ari Symmetries and symmetry-generated averages of elastic constants up to the sixth order of nonlinearity for all crystal classes, isotropy and transverse isotropy By journals.iucr.org Published On :: 2024-10-15 Algebraic expressions for averaging linear and nonlinear stiffness tensors from general anisotropy to different effective symmetries (11 Laue classes elastically representing all 32 crystal classes, and two non-crystalline symmetries: isotropic and cylindrical) have been derived by automatic symbolic computations of the arithmetic mean over the set of rotational transforms determining a given symmetry. This approach generalizes the Voigt average to nonlinear constants and desired approximate symmetries other than isotropic, which can be useful for a description of textured polycrystals and rocks preserving some symmetry aspects. Low-symmetry averages have been used to derive averages of higher symmetry to speed up computations. Relationships between the elastic constants of each symmetry have been deduced from their corresponding averages by resolving the rank-deficient system of linear equations. Isotropy has also been considered in terms of generalized Lamé constants. The results are published in the form of appendices in the supporting information for this article and have been deposited in the Mendeley database. Full Article text
ari Similarity score for screening phase-retrieved maps in X-ray diffraction imaging – characterization in reciprocal space By journals.iucr.org Published On :: 2024-01-01 X-ray diffraction imaging (XDI) is utilized for visualizing the structures of non-crystalline particles in material sciences and biology. In the structural analysis, phase-retrieval (PR) algorithms are applied to the diffraction amplitude data alone to reconstruct the electron density map of a specimen particle projected along the direction of the incident X-rays. However, PR calculations may not lead to good convergence because of a lack of diffraction patterns in small-angle regions and Poisson noise in X-ray detection. Therefore, the PR calculation is still a bottleneck for the efficient application of XDI in the structural analyses of non-crystalline particles. For screening maps from hundreds of trial PR calculations, we have been using a score and measuring the similarity between a pair of retrieved maps. Empirically, probable maps approximating the particle structures gave a score smaller than a threshold value, but the reasons for the effectiveness of the score are still unclear. In this study, the score is characterized in terms of the phase differences between the structure factors of the retrieved maps, the usefulness of the score in screening the maps retrieved from experimental diffraction patterns is demonstrated, and the effective resolution of similarity-score-selected maps is discussed. Full Article text
ari Protocol using similarity score and improved shrink-wrap algorithm for better convergence of phase-retrieval calculation in X-ray diffraction imaging By journals.iucr.org Published On :: 2024-01-01 In X-ray diffraction imaging (XDI), electron density maps of a targeted particle are reconstructed computationally from the diffraction pattern alone using phase-retrieval (PR) algorithms. However, the PR calculations sometimes fail to yield realistic electron density maps that approximate the structure of the particle. This occurs due to the absence of structure amplitudes at and near the zero-scattering angle and the presence of Poisson noise in weak diffraction patterns. Consequently, the PR calculation becomes a bottleneck for XDI structure analyses. Here, a protocol to efficiently yield realistic maps is proposed. The protocol is based on the empirical observation that realistic maps tend to yield low similarity scores, as suggested in our prior study [Sekiguchi et al. (2017), J. Synchrotron Rad. 24, 1024–1038]. Among independently and concurrently executed PR calculations, the protocol modifies all maps using the electron-density maps exhibiting low similarity scores. This approach, along with a new protocol for estimating particle shape, improved the probability of obtaining realistic maps for diffraction patterns from various aggregates of colloidal gold particles, as compared with PR calculations performed without the protocol. Consequently, the protocol has the potential to reduce computational costs in PR calculations and enable efficient XDI structure analysis of non-crystalline particles using synchrotron X-rays and X-ray free-electron laser pulses. Full Article text
ari Measuring magnetic hysteresis curves with polarized soft X-ray resonant reflectivity By journals.iucr.org Published On :: 2024-04-10 Calculations and measurements of polarization-dependent soft X-ray scattering intensity are presented during a magnetic hysteresis cycle. It is confirmed that the dependence of the intensity on the magnetic moment can be linear, quadratic or a combination of both, depending on the polarization of the incident X-ray beam and the direction of the magnetic moment. With a linearly polarized beam, the scattered intensity will have a purely quadratic dependence on the magnetic moment when the magnetic moment is parallel to the scattering plane. However, with the magnetic moment perpendicular to the scattering plane, there is also a linear component. This means that, when measuring the hysteresis with linear polarization during a hysteresis cycle, the intensity will be an even function of the applied field when the change in the magnetic moment (and field) is confined within the scattering plane but becomes more complicated when the magnetic moment is out of the scattering plane. Furthermore, with circular polarization, the dependence of the scattered intensity on the moment is a combination of linear and quadratic. With the moment parallel to the scattering plane, the linear component changes with the helicity of the incident beam. Surprisingly, in stark contrast to absorption studies, even when the magnetic moment is perpendicular to the scattering plane there is still a dependence on the moment with a linear component. This linear component is completely independent of the helicity of the beam, meaning that the hysteresis loops will not be inverted with helicity. Full Article text
ari High-throughput and high-resolution powder X-ray diffractometer consisting of six sets of 2D CdTe detectors with variable sample-to-detector distance and innovative automation system By journals.iucr.org Published On :: 2024-06-20 The demand for powder X-ray diffraction analysis continues to increase in a variety of scientific fields, as the excellent beam quality of high-brightness synchrotron light sources enables the acquisition of high-quality measurement data with high intensity and angular resolution. Synchrotron powder diffraction has enabled the rapid measurement of many samples and various in situ/operando experiments in nonambient sample environments. To meet the demands for even higher throughput measurements using high-energy X-rays at SPring-8, a high-throughput and high-resolution powder diffraction system has been developed. This system is combined with six sets of two-dimensional (2D) CdTe detectors for high-energy X-rays, and various automation systems, including a system for automatic switching among large sample environmental equipment, have been developed in the third experimental hutch of the insertion device beamline BL13XU at SPring-8. In this diffractometer system, high-brilliance and high-energy X-rays ranging from 16 to 72 keV are available. The powder diffraction data measured under ambient and various nonambient conditions can be analysed using Rietveld refinement and the pair distribution function. Using the 2D CdTe detectors with variable sample-to-detector distance, three types of scan modes have been established: standard, single-step and high-resolution. A major feature is the ability to measure a whole powder pattern with millisecond resolution. Equally important, this system can measure powder diffraction data with high Q exceeding 30 Å−1 within several tens of seconds. This capability is expected to contribute significantly to new research avenues using machine learning and artificial intelligence by utilizing the large amount of data obtained from high-throughput measurements. Full Article text
ari Demonstration of full polarization control of soft X-ray pulses with Apple X undulators at SwissFEL using recoil ion momentum spectroscopy By journals.iucr.org Published On :: 2024-08-09 The ability to freely control the polarization of X-rays enables measurement techniques relying on circular or linear dichroism, which have become indispensable tools for characterizing the properties of chiral molecules or magnetic structures. Therefore, the demand for polarization control in X-ray free-electron lasers is increasing to enable polarization-sensitive dynamical studies on ultrafast time scales. The soft X-ray branch Athos of SwissFEL was designed with the aim of providing freely adjustable and arbitrary polarization by building its undulator solely from modules of the novel Apple X type. In this paper, the magnetic model of the linear inclined and circular Apple X polarization schemes are studied. The polarization is characterized by measuring the angular electron emission distributions of helium for various polarizations using cold target recoil ion momentum spectroscopy. The generation of fully linear polarized light of arbitrary angle, as well as elliptical polarizations of varying degree, are demonstrated. Full Article text
ari Comparing single-shot damage thresholds of boron carbide and silicon at the European XFEL By journals.iucr.org Published On :: 2024-08-25 Xray free-electron lasers (XFELs) enable experiments that would have been impractical or impossible at conventional X-ray laser facilities. Indeed, more XFEL facilities are being built and planned, with their aim to deliver larger pulse energies and higher peak brilliance. While seeking to increase the pulse power, it is quintessential to consider the maximum pulse fluence that a grazing-incidence FEL mirror can withstand. To address this issue, several studies were conducted on grazing-incidence damage by soft X-ray FEL pulses at the European XFEL facility. Boron carbide (B4C) coatings on polished silicon substrate were investigated using 1 keV photon energy, similar to the X-ray mirrors currently installed at the soft X-ray beamlines (SASE3). The purpose of this study is to compare the damage threshold of B4C and Si to determine the advantages, tolerance and limits of using B4C coatings. Full Article text
ari Absolute structure determination of Berkecoumarin by X-ray and electron diffraction By journals.iucr.org Published On :: 2024-04-10 X-ray and electron diffraction methods independently identify the S-enantiomer of Berkecoumarin [systematic name: (S)-8-hydroxy-3-(2-hydroxypropyl)-6-methoxy-2H-chromen-2-one]. Isolated from Berkeley Pit Lake Penicillium sp., Berkecoumarin is a natural product with a light-atom composition (C13H14O5) that challenges in-house absolute structure determination by anomalous scattering. This study further demonstrates the utility of dynamical refinement of electron-diffraction data for absolute structure determination. Full Article text
ari Synthesis, spectroscopic and crystallographic characterization of various cymantrenyl thioethers [Mn{C5HxBry(SMe)z}(PPh3)(CO)2] By journals.iucr.org Published On :: 2024-07-05 Starting from [Mn(C5H4Br)(PPh3)(CO)2] (1a), the cymantrenyl thioethers [Mn(C5H4SMe)(PPh3)(CO)2] (1b) and [Mn{C5H4–nBr(SMe)n}(PPh3)(CO)2] (n = 1 for compound 2, n = 2 for 3 and n = 3 for 4) were obtained, using either n-butyllithium (n-BuLi), lithium diisopropylamide (LDA) or lithium tetramethylpiperidide (LiTMP) as base, followed by electrophilic quenching with MeSSMe. Stepwise consecutive reaction of [Mn(C5Br5)(PPh3)(CO)2] with n-BuLi and MeSSMe led finally to [Mn{C5(SMe)5}(PPh3)(CO)2] (11), only the fifth complex to be reported containing a perthiolated cyclopentadienyl ring. The molecular and crystal structures of 1b, 3, 4 and 11 were determined and were studied for the occurrence of S⋯S and S⋯Br interactions. It turned out that although some interactions of this type occurred, they were of minor importance for the arrangement of the molecules in the crystal. Full Article text
ari Coordination variety of phenyltetrazolato and dimethylamido ligands in dimeric Ti, Zr, and Ta complexes By journals.iucr.org Published On :: 2024-08-23 Three structurally diverse 5-phenyltetrazolato (Tz) Ti, Zr, and Ta complexes, namely, (C2H8N)[Ti2(C7H5N4)5(C2H6N)4]·1.45C6H6 or (Me2NH2)[Ti2(NMe2)4(2,3-μ-Tz)3(2-η1-Tz)2]·1.45C6H6, (1·1.45C6H6), [Zr2(C7H5N4)6(C2H6N)2(C2H7N)2]·1.12C6H6·0.382CH2Cl2 or [Zr2(Me2NH)2(NMe2)2(2,3-μ-Tz)3(2-η1-Tz)2(1,2-η2-Tz)]·1.12C6H6·0.38CH2Cl2 (2·1.12C6H6·0.38CH2Cl2), and (C2H8N)2[Ta2(C7H5N4)8(C2H6N)2O]·0.25C7H8 or (Me2NH2)2[Ta2(NMe2)2(2,3-μ-Tz)2(2-η1-Tz)6O]·0.25C7H8 (3·0.25C7H8), where TzH is 5-phenyl-1H-tetrazole, have been synthesized and structurally characterized. All three complexes are dinuclear; the Ti center in 1 is six-coordinate, whereas the Zr and Ta atoms in 2 and 3 are seven-coordinate. The coordination environments of the Ti centers in 1 are similar, and so are the ligations of the Ta centers in 3. In contrast, the two Zr centers in 2 bear a different number of ligands, one of which is a bidentate η2-5-phenyltetrazolato ligand that has not been observed previously for d-block elements. The dimethylamido ligand, present in the starting materials, remained unchanged, or was converted to dimethylamine and dimethylammonium during the synthesis. Dimethylamine coordinates as a neutral ligand, whereas dimethylammonium is retained as a hydrogen-bonded entity bridging Tz ligands. Full Article text
ari Multivalent hydrogen-bonded architectures directed by self-complementarity between [Cu(2,2'-biimidazole)] and malonate building blocks By journals.iucr.org Published On :: 2024-08-19 The synthesis and structural characterization of four novel supramolecular hydrogen-bonded arrangements based on self-assembly from molecular `[Cu(2,2'-biimidazole)]' modules and malonate anions are presented, namely, tetrakis(2,2'-biimidazole)di-μ-chlorido-dimalonatotricopper(II) pentahydrate, [Cu3(C3H2O4)2Cl2(C6H6N4)4]·5H2O or [Cu(H2biim)2(μ-Cl)Cu0.5(mal)]2·5H2O, aqua(2,2'-biimidazole)malonatocopper(II) dihydrate, [Cu(C3H2O4)(C6H6N4)(H2O)]·2H2O or [Cu(H2biim)(mal)(H2O)]·2H2O, bis[aquabis(2,2'-biimidazole)copper(II)] dimalonatodiperchloratocopper(II) 2.2-hydrate, [Cu(C6H6N4)2(H2O)]2[Cu(C3H2O4)(ClO4)2]·2.2H2O or [Cu(H2biim)2(H2O)]2[Cu(mal)2(ClO4)2]·2.2H2O, and bis(2,2'-biimidazole)copper(II) bis[bis(2,2'-biimidazole)(2-carboxyacetato)malonatocopper(II)] tridecahydrate, [Cu(C6H6N4)2][Cu(C3H2O4)(C3H3O4)(C6H6N4)2]·13H2O or [Cu(H2biim)2][Cu(H2biim)2(Hmal)(mal)]2·13H2O. These assemblies are characterized by self-complementary donor–acceptor molecular interactions, demonstrating a recurrent and distinctive pattern of hydrogen-bonding preferences among the carboxylate, carboxylic acid and N—H groups of the coordinated 2,2'-biimidazole and malonate ligands. Additionally, coordination of the carboxylate group with the metallic centre helps sustain remarkable supramolecular assemblies, such as layers, helices, double helix columns or 3D channeled architectures, including mixed-metal complexes, into a single structure. Full Article text
ari Characterization of novel mevalonate kinases from the tardigrade Ramazzottius varieornatus and the psychrophilic archaeon Methanococcoides burtonii By journals.iucr.org Published On :: 2024-02-27 Mevalonate kinase is central to the isoprenoid biosynthesis pathway. Here, high-resolution X-ray crystal structures of two mevalonate kinases are presented: a eukaryotic protein from Ramazzottius varieornatus and an archaeal protein from Methanococcoides burtonii. Both enzymes possess the highly conserved motifs of the GHMP enzyme superfamily, with notable differences between the two enzymes in the N-terminal part of the structures. Biochemical characterization of the two enzymes revealed major differences in their sensitivity to geranyl pyrophosphate and farnesyl pyrophosphate, and in their thermal stabilities. This work adds to the understanding of the structural basis of enzyme inhibition and thermostability in mevalonate kinases. Full Article text
ari Comparison of two crystal polymorphs of NowGFP reveals a new conformational state trapped by crystal packing By journals.iucr.org Published On :: 2024-09-02 Crystal polymorphism serves as a strategy to study the conformational flexibility of proteins. However, the relationship between protein crystal packing and protein conformation often remains elusive. In this study, two distinct crystal forms of a green fluorescent protein variant, NowGFP, are compared: a previously identified monoclinic form (space group C2) and a newly discovered orthorhombic form (space group P212121). Comparative analysis reveals that both crystal forms exhibit nearly identical linear assemblies of NowGFP molecules interconnected through similar crystal contacts. However, a notable difference lies in the stacking of these assemblies: parallel in the monoclinic form and perpendicular in the orthorhombic form. This distinct mode of stacking leads to different crystal contacts and induces structural alteration in one of the two molecules within the asymmetric unit of the orthorhombic crystal form. This new conformational state captured by orthorhombic crystal packing exhibits two unique features: a conformational shift of the β-barrel scaffold and a restriction of pH-dependent shifts of the key residue Lys61, which is crucial for the pH-dependent spectral shift of this protein. These findings demonstrate a clear connection between crystal packing and alternative conformational states of proteins, providing insights into how structural variations influence the function of fluorescent proteins. Full Article text
ari Cocrystals of a coumarin derivative: an efficient approach towards anti-leishmanial cocrystals against MIL-resistant Leishmania tropica By journals.iucr.org Published On :: 2024-03-01 Leishmaniasis is a neglected parasitic tropical disease with numerous clinical manifestations. One of the causative agents of cutaneous leishmaniasis (CL) is Leishmania tropica (L. tropica) known for causing ulcerative lesions on the skin. The adverse effects of the recommended available drugs, such as amphotericin B and pentavalent antimonial, and the emergence of drug resistance in parasites, mean the search for new safe and effective anti-leishmanial agents is crucial. Miltefosine (MIL) was the first recommended oral medication, but its use is now limited because of the rapid emergence of resistance. Pharmaceutical cocrystallization is an effective method to improve the physicochemical and biological properties of active pharmaceutical ingredients (APIs). Herein, we describe the cocrystallization of coumarin-3-carboxylic acid (CU, 1a; 2-oxobenzopyrane-3-carboxylic acid, C10H6O4) with five coformers [2-amino-3-bromopyridine (1b), 2-amino-5-(trifluoromethyl)-pyridine (1c), 2-amino-6-methylpyridine (1d), p-aminobenzoic acid (1e) and amitrole (1f)] in a 1:1 stoichiometric ratio via the neat grinding method. The cocrystals 2–6 obtained were characterized via single-crystal X-ray diffraction, powder X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis, as well as Fourier transform infrared spectroscopy. Non-covalent interactions, such as van der Waals, hydrogen bonding, C—H⋯π and π⋯π interactions contribute significantly towards the packing of a crystal structure and alter the physicochemical and biological activity of CU. In this research, newly synthesized cocrystals were evaluated for their anti-leishmanial activity against the MIL-resistant L. tropica and cytotoxicity against the 3T3 (normal fibroblast) cell line. Among the non-cytotoxic cocrystals synthesized (2–6), CU:1b (2, IC50 = 61.83 ± 0.59 µM), CU:1c (3, 125.7 ± 1.15 µM) and CU:1d (4, 48.71 ± 0.75 µM) appeared to be potent anti-leishmanial agents and showed several-fold more anti-leishmanial potential than the tested standard drug (MIL, IC50 = 169.55 ± 0.078 µM). The results indicate that cocrystals 2–4 are promising anti-leishmanial agents which require further exploration. Full Article text
ari Structural characterization of a new samarium–sodium heterometallic coordination polymer By journals.iucr.org Published On :: 2024-02-06 Lanthanide-containing materials are of interest in the field of crystal engineering because of their unique properties and distinct structure types. In this context, a new samarium–sodium heterometallic coordination polymer, poly[tetrakis(μ2-2-formyl-6-methoxyphenolato)samarium(III)sodium(I)], {[SmNa(C8H7O3)4]·solvent}n (Sm-1), was synthesized and crystallized via slow evaporation from a mixture of ethanol and acetonitrile. The compound features alternating SmIII and NaI ions, which are linked by ortho-vanillin (o-vanillin) ligands to form a mono-periodic chain-like coordination polymer. The chains propagate along the [001] direction. Residual electron density of disordered solvent molecules in the void space could not be reasonably modeled, thus the SQUEEZE function was applied. The structural, vibrational, and optical properties are reported. Full Article text
ari Synthesis and crystal structures of three organoplatinum(II) complexes bearing natural arylolefin and quinoline derivatives By journals.iucr.org Published On :: 2024-05-21 Three organoplatinum(II) complexes bearing natural arylolefin and quinoline derivatives, namely, [4-methoxy-5-(2-methoxy-2-oxoethoxy)-2-(prop-2-en-1-yl)phenyl](quinolin-8-olato)platinum(II), [Pt(C13H15O4)(C9H6NO)], (I), [4-methoxy-5-(2-oxo-2-propoxyethoxy)-2-(prop-2-en-1-yl)phenyl](quinoline-2-carboxylato)platinum(II), [Pt(C15H19O4)(C10H6NO2)], (II), and chlorido[4-methoxy-5-(2-oxo-2-propoxyethoxy)-2-(prop-2-en-1-yl)phenyl](quinoline)platinum(II), [Pt(C15H19O4)Cl(C9H7N)], (III), were synthesized and structurally characterized by IR and 1H NMR spectroscopy, and by single-crystal X-ray diffraction. The results showed that the cycloplatinated arylolefin coordinates with PtII via the carbon atom of the phenyl ring and the C=Colefinic group. The deprotonated 8-hydroxyquinoline (C9H6NO) and quinoline-2-carboxylic acid (C10H6NO2) coordinate with the PtII atom via the N and O atoms in complexes (I) and (II) while the quinoline (C9H7N) coordinates via the N atom in (III). Moreover, the coordinating N atom in complexes (I)–(III) is in the cis position compared to the C=Colefinic group. The crystal packing is characterized by C—H⋯π, C—H⋯O [for (II) and (III)], C—H⋯Cl [for (III) and π–π [for (I)] interactions. Full Article text
ari Three-dimensional alkaline earth metal–organic framework poly[[μ-aqua-aquabis(μ3-carbamoylcyanonitrosomethanido)barium] monohydrate] and its thermal decomposition By journals.iucr.org Published On :: 2024-08-30 In the structure of the title salt, {[Ba(μ3-C3H2N3O2)2(μ-H2O)(H2O)]·H2O}n, the barium ion and all three oxygen atoms of the water molecules reside on a mirror plane. The hydrogen atoms of the bridging water and the solvate water molecules are arranged across a mirror plane whereas all atoms of the monodentate aqua ligand are situated on this mirror plane. The distorted ninefold coordination of the Ba ions is completed with four nitroso-, two carbonyl- and three aqua-O atoms at the distances of 2.763 (3)–2.961 (4) Å and it is best described as tricapped trigonal prism. The three-dimensional framework structure is formed by face-sharing of the trigonal prisms, via μ-nitroso- and μ-aqua-O atoms, and also by the bridging coordination of the anions via carbonyl-O atoms occupying two out of the three cap positions. The solvate water molecules populate the crystal channels and facilitate a set of four directional hydrogen bonds. The principal Ba–carbamoylcyanonitrosomethanido linkage reveals a rare example of the inherently polar binodal six- and three-coordinated bipartite topology (three-letter notation sit). It suggests that small resonance-stabilized cyanonitroso anions can be utilized as bridging ligands for the supramolecular synthesis of MOF solids. Such an outcome may be anticipated for a broader range of hard Lewis acidic alkaline earth metal ions, which perfectly match the coordination preferences of highly nucleophilic nitroso-O atoms. Thermal analysis reveals two-stage dehydration of the title compound (383 and 473 K) followed by decomposition with release of CO2, HCN and H2O at 558 K. Full Article text
ari Crystal structures of two different multi-component crystals consisting of 1-(3,4-dimethoxybenzyl)-6,7-dimethoxyisoquinoline and fumaric acid By journals.iucr.org Published On :: 2024-10-11 Two different multi-component crystals consisting of papaverine [1-(3,4-dimethoxybenzyl)-6,7-dimethoxyisoquinoline, C20H21NO4] and fumaric acid [C4H4O4] were obtained. Single-crystal X-ray structure analysis revealed that one, C20H21NO4·1.5C4H4O4 (I), is a salt co-crystal composed of salt-forming and non-salt-forming molecules, and the other, C20H21NO4·0.5C4H4O4 (II), is a salt–co-crystal intermediate (i.e., in an intermediate state between a salt and a co-crystal). In this study, one state (crystal structure at 100 K) within the salt–co-crystal continuum is defined as the ‘intermediate’. Full Article text
ari Review and experimental comparison of speckle-tracking algorithms for X-ray phase contrast imaging By journals.iucr.org Published On :: This review focuses on low-dose near-field X-ray speckle phase imaging in the differential mode introducing the existing algorithms with their specifications and comparing their performances under various experimental conditions. Full Article text
ari A workflow for single-particle structure determination via iterative phasing of rotational invariants in fluctuation X-ray scattering By journals.iucr.org Published On :: 2024-03-15 Fluctuation X-ray scattering (FXS) offers a complementary approach for nano- and bioparticle imaging with an X-ray free-electron laser (XFEL), by extracting structural information from correlations in scattered XFEL pulses. Here a workflow is presented for single-particle structure determination using FXS. The workflow includes procedures for extracting the rotational invariants from FXS patterns, performing structure reconstructions via iterative phasing of the invariants, and aligning and averaging multiple reconstructions. The reconstruction pipeline is implemented in the open-source software xFrame and its functionality is demonstrated on several simulated structures. Full Article text
ari Pinhole small-angle neutron scattering based approach for desmearing slit ultra-small-angle neutron scattering data By journals.iucr.org Published On :: 2024-09-25 Presented here is an effective approach to desmearing slit ultra-small-angle neutron scattering (USANS) data, based on complementary small-angle neutron scattering (SANS) measurements, leading to a seamless merging of these data sets. The study focuses on the methodological aspects of desmearing USANS data, which can then be presented in the conventional manner of SANS, enabling a broader pool of data analysis methods. The key innovation lies in the use of smeared SANS data for extrapolating slit USANS, offering a self-consistent integrand function for desmearing with Lake's iterative method. The proposed approach is validated through experimental data on porous anodized aluminium oxide membranes, showcasing its applicability and benefits. The findings emphasize the importance of accurate desmearing for merging USANS and SANS data in the crossover q region, which is particularly crucial for complex scattering patterns. Full Article text
ari FilmWeek: ‘Tina,’ ‘The Marijuana Conspiracy,’ ‘The Vault’ And More By www.scpr.org Published On :: Fri, 26 Mar 2021 08:57:00 -0700 Tina Turner performing, used in the documentary "Tina." ; Credit: Dave Hogan/Getty Images/HBO FilmWeek MarqueeLarry Mantle and KPCC film critics Wade Major, Claudia Puig, Peter Rainer and Charles Solomon review this weekend’s new movie releases.This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari CAAM exhibits the diversity of the disappearing black woman By www.scpr.org Published On :: Thu, 15 Jun 2017 14:17:26 -0700 "Dispersion" (detail). Acrylic ink and paint on canvas. (Courtesy of Kenyatta A.C. Hinkle); Credit: Rosalie Atkinson | Off-Ramp®Kenyatta A.C. Hinkle's "The Evanesced" was inspired by the #SayHerName movement against police violence, as well as Los Angeles's Grim Sleeper serial killer. Hinkle depicts black women in the nude, twisting and writhing, as though they're sinking back into the canvas. Or are they reemerging from it? Deputy Director of the California African American Museum Naima Keith says Hinkle's exhibit looks at the "historical present," the way in which history still affects us today, harkening back to slavery and Jim Crow. Keith says the main issue Hinkle is addressing is the invisibility of black women, especially those who are abused or in danger. Hinkle was particularly inspired by the South LA serial killer "The Grim Sleeper." He is accused of murdering over one hundred women from the 1980's onward, until being captured in 2007. Many of his victims were women of color according to the Los Angeles Police Department. "He had been killing prostitutes and runaways and drug addicted women," says Keith, noting that some saw these deaths as occupational hazards. Most of Hinkle's subjects in the paintings and sketches in "The Evanesced" are clearly nude. This was a deliberate choice to showcase femininity, according to Keith. She says: She’s talking about being women... There’s love, there’s joy, there’s pain. All things we experience as all women... But [nudity], I think, allows us to focus on the female form, not necessarily get caught up on what they are wearing or what they’re doing. In the artwork, viewers can see that every face, body, and hair style is completely unique to each sketch or painting. Keith says this helps the viewer appreciate the diversity amongst women of color. She says: You have women that are smiling. You have women that are looking at you- you know- lovingly, shyly. Not every one, not every image in the show is about negativity, disappearance, or sadness. There is a bit of celebration. There’s interaction between multiple women. That’s what makes the body of work so interesting: it’s not just seeing women of color through one lens. There’s the possibility of seeing them through, like I said, disappearance, and also the freedom to have a wide range of emotions. There is one painting that continues to draw Naima Keith back to it. It is called "Uproot 2017" and it features a feminine figure with three exposed breasts. She says this painting speaks to her about motherhood and the connection women have with their changing bodies. Keith says: I asked Kenyatta why she depicts women with multiple [extra] breasts and we had a conversation about being moms. Kenyatta and I are both mothers of young children... As moms, we just kinda talked about how things aren't what they used to be, in terms of where they used to be. Like I said, becoming mothers, you have this different relationship with your body in relation to someone else. Kenyatta A.C. Hinkle's "The Evanesced" runs at the California African American Museum through June 25, 2017. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Scientists recover the first genetic data from an extinct bird in the Caribbean By news.science360.gov Published On :: 2019-09-03T07:00:00Z Full Text:Scientists have recovered the first genetic data from an extinct bird in the Caribbean, thanks to the remarkably preserved bones of a Creighton's caracara in a flooded sinkhole on Great Abaco Island in the Bahamas. Studies of ancient DNA from tropical birds have faced two formidable obstacles. Organic material quickly degrades when exposed to heat, light and oxygen. And birds' lightweight, hollow bones break easily, accelerating the decay of the DNA within. But the dark, oxygen-free depths of a 100-foot blue hole known as Sawmill Sink provided ideal preservation conditions for the bones of Caracara creightoni, a species of large carrion-eating falcon that disappeared soon after humans arrived in the Bahamas about 1,000 years ago. Florida Museum of Natural History researcher Jessica Oswald and her colleagues extracted and sequenced genetic material from the 2,500-year-old C. creightoni femur. Because ancient DNA is often fragmented or missing, the team had modest expectations for what they would find –- maybe one or two genes. But instead, the bone yielded 98.7% of the bird's mitochondrial genome, the DNA most living things inherit from their mothers. The mitochondrial genome showed that C. creightoni is closely related to the two remaining caracara species alive today: the crested caracara and the southern caracara. The three species last shared a common ancestor between 1.2 and 0.4 million years ago. "This project enhanced our understanding of the ecological and evolutionary implications of extinction, forged strong international partnerships, and trained the next generation of researchers," says Jessica Robin, a program director in National Science Foundation's Office of International Science and Engineering, which funded the study.Image credit: Florida Museum photo by Kristen Grace Full Article
ari SuperSum, In Defense of Floating Point Arithmetic By blogs.mathworks.com Published On :: Thu, 27 Jun 2024 17:54:38 +0000 Floating point arithmetic doesn't get the respect it deserves. Many people consider it mysterious, fuzzy, unpredictable. These misgivings often occur in discussion of vector sums. Our provocatively named SuperSum is intended to calm these fears.... read more >> Full Article Numerical Analysis Performance Precision Symbolic
ari Delta Variant Of The Coronavirus Could Dominate In U.S. Within Weeks By www.scpr.org Published On :: Tue, 22 Jun 2021 04:20:19 -0700 Rob Stein | NPRThe dangerous Delta variant of the coronavirus is spreading so quickly in the United States that it's likely the mutant strain will become predominant in the U.S. within weeks, according to a new analysis. The variant, first identified in India, is the most contagious yet and, among those not yet vaccinated, may trigger serious illness in more people than other variants do, say scientists tracking the spread of infection. The Delta variant apparently already accounts for at least 14% of all new infections, according to the research analysis posted online Monday of more than 242,000 infections nationwide over the last six months. Another reason to get vaccinated "It definitely is of concern," says William Lee, the vice president of science at Helix, which is under contract with the Centers for Disease Control and Prevention to help track the variants. "Just the fact that it's so transmissible means that it's it's dangerous," Lee says, "and so I think you'll see outbreaks of Delta around the country and more people will get sick from it." Helix launched the study when researchers spotted a drop in the prevalence of the Alpha variant, a contagious strain first spotted in the U.K. that had quickly become the dominant variant in that country and the U.S. The researchers discovered the drop in relative frequency of the Alpha variant in their spot checks of strains circulating in the U.S. was due to a rapid increase in two other variants: the Gamma variant, first spotted in Brazil, and the Delta variant. The Gamma variant may be slightly better than the original strain at outmaneuvering the vaccines, researchers say. "It looks like both of them are going to slowly push out Alpha," says Lee, whose study has not yet been peer-reviewed but has been posted on a pre-print server. How Delta could prompt another U.S. COVID-19 surge All the vaccines authorized for use in the U.S. appear, in general, to provide powerful protection against all the variants, including Delta. But the rapid spread of the variants is still raising concern because of the large number of people who remain unvaccinated. "There still are big portions of the country where the rates of vaccination are quite low," notes Dr. Jeremy Luban, a virologist at the University of Massachusetts Medical School. "And, in fact, the Helix paper shows that this Delta variant is increasing in frequency — the speed at which it's increasing in frequency is greatest in those areas where vaccination rates are lowest." The Delta variant could trigger yet another moderate surge of infections through many parts of the U.S. because of these pockets of unvaccinated people, according to a recent set of projections from the COVID-19 Scenario Modeling Hub, which is helping the CDC plot the future course of the pandemic. The projections indicate that infections could start to rise again as soon as some time in July, especially if the vaccination campaign continues to stall. "For the most part, it's a moderate resurgence," says Justin Lessler, an epidemiologist at Johns Hopkins University who is helping coordinate the hub. "We're not having massive epidemics at a national level, but we have this kind of continuation of the virus just sticking around and keeping us on our toes," Lessler says. "And in specific places there could be substantial epidemics still." Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Moderna Says Studies Show Its Vaccine Is Effective Against The Delta Variant By www.scpr.org Published On :: Wed, 30 Jun 2021 10:40:10 -0700 Moderna says recently completed studies have found its vaccine to have a neutralizing effect against all COVID-19 variants tested, including the delta variant.; Credit: Fred Tanneau/AFP via Getty Images Laurel Wamsley | NPRStudies have found that Moderna's COVID-19 vaccine is effective against several variants of concern, including the delta variant, the biotech company announced. Moderna said Tuesday that recently completed studies have found the vaccine to have a neutralizing effect against all COVID-19 variants tested, including the beta, delta, eta and kappa variants. While still highly effective against the delta variant, the study showed the vaccine was less effective against it and certain other variants than against the original strain of the virus. The antibody response against the delta variant was about two times weaker than against the ancestral strain of the virus. The news echoes other findings that the Moderna and Pfizer vaccines are highly effective against the delta variant. A study published this month in Nature found that Pfizer's vaccine was able to neutralize variants including delta, though at somewhat reduced strength. "These new data are encouraging and reinforce our belief that the Moderna COVID-19 Vaccine should remain protective against newly detected variants," Stéphane Bancel, Moderna's chief executive officer, said in a statement. "These findings highlight the importance of continuing to vaccinate populations with an effective primary series vaccine." The company also said it is developing a booster candidate: a 50-50 mix of its currently authorized COVID-19 vaccine and another messenger RNA vaccine it has developed. The delta variant is spreading fast The delta variant is the fast-moving form of the coronavirus that is now found in 96 countries, including the United States. Last week, Dr. Anthony Fauci of the National Institutes of Health said the delta variant is "currently the greatest threat in the U.S. to our attempt to eliminate COVID-19," noting that the proportion of infections being caused by the variant is doubling every two weeks. The delta variant is now infecting at least 1 out of every 5 people who get the virus in the United States. In some sections of the country, the variant is already far more common, particularly in parts of the Midwest and West. At its current pace, the delta variant is expected to be the dominant virus in the U.S. within weeks. Dr. Maria Van Kerkhove, an infectious disease expert at the World Health Organization, called the delta variant "incredibly transmissible." "These viruses are becoming more fit. The virus is evolving, and this is natural," she told NPR's Morning Edition. "It's more transmissible than the alpha variant, so we need to just do all we can to prevent as many infections as we can and do what we can do to reduce the spread." Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari COVID-19 AMA: J&J Says Its Vaccine Is Effective Against Delta Variant, WHO Says All Authorized Vaccines Should Be Recognized By The West And More By www.scpr.org Published On :: Fri, 02 Jul 2021 09:23:15 -0700 Detail of boxes with the U.S. donated Johnson & Johnson vaccine against Covid-19 at Universidad de Baja California on June 17, 2021 in Tijuana, Baja California. ; Credit: Francisco Vega/Getty Images James Chow | AirTalkIn our continuing series looking at the latest medical research and news on COVID-19, Larry Mantle speaks with Dr. Annabelle De St. Maurice from University of California Los Angeles/Mattel Children’s hospital. Topics today include: J&J says its vaccine is effective against Delta variant J&J vaccine lasts at least 8 months WHO says all vaccines it authorized should be recognized by reopening countries White House says it will miss July 4 vaccination goal Postpartum depression on the rise during the pandemic Experts believe Novavax may play a role in combating vaccine hesitancy Delta variant is not driving a surge in hospitalization rates in England Guest: Annabelle De St. Maurice, M.D., assistant professor of pediatrics in the division of infectious diseases and the co-chief infection prevention officer at University of California Los Angeles/Mattel Children’s hospital; she tweets @destmauricemd This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari COVID-19 AMA: National Vaccination Campaign, Variants And Vaccinating Animals By www.scpr.org Published On :: Tue, 06 Jul 2021 09:17:18 -0700 A passenger wearing a protective face covering to combat the spread of the coronavirus, checks her phone while travelling on a bus along Oxford Street in central London on July 5, 2021.; Credit: DANIEL LEAL-OLIVAS/AFP via Getty Images AirTalkIn our continuing series looking at the latest medical research and news on COVID-19, Larry Mantle speaks with Professor Kristen Choi of UCLA. Topics today include: Biden to announce new efforts on vaccination campaign as Delta variant spreads Hospitalization rates getting worse for black residents of L.A. County Which parts of the U.S. could be breeding grounds for variants? New Israeli data about effectiveness of Pfizer against Delta variant England to lift mask restrictions Cases on rise in immigration detention centers in the U.S. Bay area zoo is vaccinating big cats and some other animals Guest: Kristen R. Choi, professor of nursing and public health at UCLA; registered nurse practicing at Gateways Hospital, based in Echo Park This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Marine Mineral Formations in the Arctic Ocean Challenge Existing Geologic Theories By www.usgs.gov Published On :: Tue, 12 Nov 2024 14:02:54 EST A new study from USGS describes a previously unknown process of marine mineral formation in the Arctic Ocean, driven by frictional heating along tectonic faults rather than by hydrothermal activity. Full Article
ari Arizona Republicans Strip Some Election Power From Democratic Secretary Of State By www.scpr.org Published On :: Wed, 30 Jun 2021 19:00:09 -0700 "This is a petty, partisan power grab that is absolutely retaliation towards my office," Arizona Democratic Secretary of State Katie Hobbs says of the new law.; Credit: Ross D. Franklin/AP Ben Giles | NPRArizona Republicans have stripped the secretary of state's office — currently held by a Democrat — of the right to defend the state's election laws in court, or choose not to, a change enacted as part of Arizona's newly signed budget. The spending blueprint that Gov. Doug Ducey signed into law Wednesday declares that the attorney general — currently a position occupied by Republican Mark Brnovich — has sole authority over election-related litigation. If the secretary of state and attorney general were to disagree over a legal strategy when Arizona election laws are challenged, the new law states that "the authority of the attorney general to defend the law is paramount." Republicans also adopted language stating it's their intent for the law to apply through Jan. 2, 2023, coinciding with the end of Democrat Katie Hobbs' term as secretary of state. Hobbs, the top election official in Arizona who's now running for governor, says her lawyers are looking at whether this change violates the Arizona Constitution. "This is a petty, partisan power grab that is absolutely retaliation towards my office," Hobbs said. "It's clear by the fact that it ends when my term ends. ... It is at best legally questionable, but at worst, likely unconstitutional." Republicans have generally cast the law as a cost-saving measure, citing Hobbs and Brnovich's frequent disagreements over how to defend state election laws that have been challenged in court. In 2020, Hobbs filed complaints with the state bar against Brnovich and other lawyers in his office. Other election provisions in the budget The budget includes a number of other election provisions, and it comes weeks after Republicans enacted new restrictions on early voting in the state, and as a controversial review of 2020 election results in Maricopa County continues. Here are some of the other election-related measures in the budget: New laws could soon require watermarks, QR codes and other security measures to be printed on ballots. There's a new mandate to inspect state and county voter registration databases and create a report on voters who cast federal-only ballots — an option available to Arizonans who don't show proof of citizenship to register to vote in the state, but are still allowed to register under federal law. And a new task force would investigate alleged social media bias as an unreported in-kind political contribution. The ballot security measures, though not mandated by law in the budget, have the potential to be the most cumbersome and costly requirement for county election officials to implement. The budget amendment provides a list of 10 "ballot fraud countermeasures" for counties to choose from — features like holographic foil, background designs similar to those found on banknotes and ultraviolet or infrared ink. If mandated, counties would have to implement any combination of at least three features from the list on their ballots. The budget provides $12 million to pay for those features, to be split among Arizona's 15 counties. "By everyone's admission, there is only one company that can do any of this," said Jennifer Marson, executive director of the Arizona Association of Counties. "And so now, we can't have a competitive bid process or a traditional procurement process at the county or state level to use these countermeasures because we're locked into one company." That company is Authentix, a Texas-based firm that provided Republican Rep. Mark Finchem with a sample ballot that included watermarks, QR codes and other security measures. Finchem had the sample ballot on display at the Capitol in March. According to the Yellow Sheet Report, it could be five times more expensive to print ballots with those security measures as it is to print paper ballots currently in use. Marson said Finchem has acknowledged the security levels required of companies in the budget amendment could only be met by Authentix, and has vowed to mandate the ballot security measures in the "very near future." Finchem defended the company in a brief email. He wrote that Authentix "offers these countermeasures to governments around the world for document and tax stamp security." As the budget was being considered, Democrats like Sen. Tony Navarrete said the amendment is part of a broad effort to solidify conspiracy theories of election fraud. "It's important for us to make sure we vote down conspiracy-laced amendments that are going to hurt the integrity of our election system in the state of Arizona and encourage other states to have these bad copycat laws spread like wildfire," he said. Copyright 2021 KJZZ. To see more, visit KJZZ. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari 5 Findings From A New NPR/PBS NewsHour/Marist Poll On COVID-19 And The Economy By www.scpr.org Published On :: Thu, 01 Jul 2021 04:40:08 -0700 A waitress wears a face mask while serving at Langer's Delicatessen-Restaurant in Los Angeles on June 15.; Credit: Frederic J. Brown/AFP via Getty Images Domenico Montanaro | NPRNormal is not easily defined. The past 15 months, though, have certainly been anything but. Americans are starting to believe a "sense of normal" is approaching fairly soon, however, according to a new NPR/PBS NewsHour/Marist survey. The poll also found that with the coronavirus receding in this country, mask-wearing is declining and Americans are going out more. But they remain cautious about being in large crowds. As the country continues to open up, more focus turns to the economy, which cratered during the beginning of the pandemic last year. And Americans are split by race, gender and politics on whether President Biden's ambitious policies are helping or not. Race, gender, party divides on Biden and the economy Three months ago, in a similar survey, 49% of adults said the president's policies were strengthening the economy, while 44% said they were weakening it. Now, that's declined a net of 6 points, as 44% of respondents in the new poll say Biden's policies have strengthened the economy and 45% say the opposite. The percentage who were unsure also jumped 4 points. It's all a little bit of a warning sign for Biden, as he pushes for two large — and expensive — spending packages. There are significant splits by race and gender: Just 39% of whites said Biden's policies have strengthened the economy, but 52% of people of color say they have. 54% of independent men say his policies have weakened the economy, while 56% of independent women say they've strengthened it. 45% of white male college grads say Biden has strengthened the economy, but a significantly higher 64% of white women with college degrees said so. Inflation vs. wages by party A quarter of Americans rank inflation as the U.S. economy's top concern. That's followed by wages, unemployment, housing costs, labor shortages, gas prices and interest rates. But there's a sharp political divide on the question. Republicans and independents rank inflation as their top concern, while for Democrats, it was wages. Just 4% of Republicans said wages were their top concern. Return to "normal" Americans are growing increasingly optimistic about when life will return to a "sense of normal," as the survey labels it. In April, three-quarters of Americans said they believe it will take six months or more. Now, it's just half. About a quarter (27%) say it will be less than six months, up from 15% two months ago. People are also growing more comfortable doing certain things, saying they're: dining out at restaurants (78%) and visiting unvaccinated friends and family (75%). But they are not as comfortable doing others: almost 7-in-10 are not going out to bars; about two-thirds are not attending live concerts or sporting events (65%); and a majority have also not resumed going to in-person religious services (54%). COVID-19 vaccines and going back to work While half say they are concerned about another coronavirus surge, almost 9-in-10 U.S. adults with jobs say they are at least somewhat comfortable returning to work. Notably, a majority (57%) of those with jobs do not believe employers should require COVID-19 vaccines as a condition to return to in-person work. More than a quarter of Americans say they will not get vaccinated. The most resistant to getting vaccinated continue to be supporters of former President Donald Trump. Half of them say they won't get the shot, the highest of any group surveyed. Trump has touted the vaccine and got it himself. Since Centers for Disease Control and Prevention guidelines came out, noting that Americans who have been vaccinated can largely set masks aside, there's been a double-digit decline in those saying they wear a mask even when it's not required. There's also been a double-digit increase in those saying they generally do not wear a mask. In May, 49% said they wore masks even when it was not required. Now, that's just 36%. One-in-five said they generally do not wear masks. Two months ago, it was less than one-in-10. Affordability, not coronavirus, limiting vacations Speaking of getting back to normal, a majority of Americans say they plan to take a vacation this summer. But of the significant minority (45%) who say they aren't taking one, almost three times as many cited affordability (35%) as the main reason for not going, as opposed to concerns about COVID-19 (12%). Methodology: The poll of 1,115 U.S. adults was conducted using live telephone interviewers from June 22 through June 29. Survey questions were available in English or Spanish. The full sample has a margin of error of plus or minus 3.7 percentage points, with larger margins of error for smaller group subsets. Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Jr. Miner Set to Resume Pursuit of Placer Gold-Bearing Channel By www.streetwisereports.com Published On :: Thu, 07 Nov 2024 00:00:00 PST Omineca Mining and Metals Ltd. (OMM:TSX.V; OMMSF:OTCMKTS) announced it is set to restart mining and gravel extraction at its Wingdam placer gold project in British Columbia's historic Cariboo Mining District. Read why one expert thinks its new methods are a key to possible success. Full Article OMM:TSX.V; OMMSF:OTCMKTS
ari White House Is Preparing To Give Back California's Smog-Busting Powers By www.scpr.org Published On :: Mon, 26 Apr 2021 17:00:09 -0700 Cars make their way toward downtown Los Angeles on April 22. California could regain the right to set its own vehicle emissions standards after the Environmental Protection Agency announced it was moving to curb a Trump-era policy that sought to erode the state's previously-held power.; Credit: Mario Tama/Getty Images Camila Domonoske | NPRThe Environmental Protection Agency (EPA) said on Monday it is preparing to restore California's right to set its own vehicle emissions standards, in a widely anticipated reversal of Trump-era policies. The decision, which will take several months to be finalized, reaffirms the Golden State's powerful position as an environmental regulator after the Trump administration had in 2019 sought to remove California's powers to set its own emissions standards. It also sets the stage for negotiations over how strict federal vehicle standards will be under President Biden. "I am a firm believer in California's long-standing statutory authority to lead," EPA administration Michael Regan said in a statement. "The 2019 decision to revoke the state's waiver to enforce its greenhouse gas pollution standards for cars and trucks was legally dubious and an attack on the public's health and wellbeing," he added. The EPA will be accepting public comment until July 6 as part of the process of reversing the Trump-era rule. The populous, car-loving state has been waging a battle against smog for decades. And in recognition of that history, the EPA has long granted a waiver giving the state the authority to set its own standards for vehicle emissions, as long as they're more stringent than the national regulations. That's an unusual exemption — other states can't set their own policies, although they can choose to adopt California's standards as their own. Between California and the states that follow suit, about a third of the U.S. new car market is covered by the Golden State's policies, giving California regulators a remarkable amount of sway over the auto industry. However, when the Trump administration weakened federal clean car standards, it also sought to revoke the waiver allowing California to set a higher bar. That triggered a legal battle and divided the auto industry, with some carmakers choosing to side with California and voluntarily accept somewhat stricter vehicle emissions standards while the rest backed the Trump administration. After Biden won the White House, every major automaker eventually dropped their support for the now-doomed Trump position. The EPA has now started the process of reversing Trump's decision. The Department of Transportation last week also proposed to "wipe clean the regulatory slate," indicating that the National Highway Traffic Safety Administration would no longer seek to block state emissions standards, as it had under Trump. It's still not clear what federal regulations on vehicle emissions and fuel economy will be under the Biden administration. Some environmental groups and progressive lawmakers are pushing for the reinstatement of the Obama-era standards, with more ambitious targets to follow. The auto industry, meanwhile, is calling for standards midway between the Obama-era and Trump-era policies. The EPA says it will propose new fuel economy rules in July. Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Alasdair Harris: How Can Coastal Conservation Save Marine Life And Fishing Practices? By www.scpr.org Published On :: Fri, 25 Jun 2021 09:20:19 -0700 ; Credit: /Courtesy of TED Manoush Zomorodi, Matthew Cloutier, and SANAZ MESHKINPOUR | NPRPart 3 of TED Radio Hour episode: An SOS From The Ocean In 1998, Alasdair Harris went to Madagascar to research coral reefs. He's worked there ever since. He explains the true meaning of conservation he learned from the island's Indigenous communities. About Alasdair Harris Alasdair Harris is a marine biologist and the founder of the organization Blue Ventures. His organization seeks to catalyze and sustain locally-led marine conservation in coastal communities around the world. His work focuses on rebuilding tropical fisheries and working with coastal people to increase their sources of income. Harris holds a PhD in tropical marine ecology, and an honorary doctorate of science from the University of Edinburgh. This segment of TED Radio Hour was produced by Matthew Cloutier and edited by Sanaz Meshkinpour. You can follow us on Twitter @TEDRadioHour and email us at TEDRadio@npr.org. Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari New Librarian serving Conover and Claremont branches of County Library By www.catawbacountync.gov Published On :: Wed, 16 Nov 2011 09:55:00 EST Catawba County Library System has hired a librarian to serve both the Conover and Claremont branches. Siobhan Loendorf will add preschool Ready to Learn sessions, computer classes and adult programming for Conover and Claremont branch libraries. Full Article News Release FYI Please Choose
ari Borrowing privileges at Lenoir-Rhyne U. Library for users of Hickory Public & Catawba County Libraries By www.catawbacountync.gov Published On :: Wed, 24 Oct 2012 13:45:00 EST A new agreement extends borrowing privileges at Lenoir-Rhyne University Library to registered users of Hickory Public and Catawba County Libraries. Full Article Please Choose Please Choose Please Choose
ari In A Court Hearing, Britney Spears Asks For Conservatorship To End By www.scpr.org Published On :: Wed, 23 Jun 2021 15:20:05 -0700 Britney Spears performing onstage in Las Vegas in 2016.; Credit: Christopher Polk/Getty Images Andrew Limbong | NPR Updated June 23, 2021 at 6:05 PM ET Addressing a Los Angeles Superior Court judge today via a remote connection, Britney Spears on Wednesday afternoon made her most public statement to date about her long-running conservatorship. For over a decade, the pop star's life has been ruled by an atypical court-dictated legal arrangement that removes practically all autonomy from her life. Until now, the pop star has remained mostly quiet on the subject. Today, in a passionate statement, she plead for the conservatorship to end. According to tweets sent by observers on the scene, Spears was open and outspoken about her situation. She said her life was being exploited, and she can't sleep, is depressed and cries every day. She stated that she wants another baby, but is forced by the agreement to keep an IUD in place. Before today, after a recent New York Times and FX documentary, Framing Britney Spears, reignited interest in her story and the wider #FreeBritney movement, she has shied away from public comment, but did share some thoughts on social media. "I didn't watch the documentary but from what I did see of it I was embarrassed by the light they put me in," she wrote in an Instagram caption in March. "I cried for two weeks and well .... I still cry sometimes !!!!" But on Tuesday, The New York Times, citing recently obtained confidential court records, reported that Spears has been trying to fight her conservatorship for years. "She articulated she feels the conservatorship has become an oppressive and controlling tool against her," a court investigator wrote in a 2016 report. The system had "too much control," Ms. Spears said, according to the investigator's account of the conversation. "Too, too much!" Ms. Spears informed the investigator that she wanted the conservatorship terminated as soon as possible. "She is 'sick of being taken advantage of' and she said she is the one working and earning her money but everyone around her is on her payroll," the investigator wrote. In 2019, Ms. Spears told the court that she had felt forced by the conservatorship into a stay at a mental health facility and to perform against her will. You can find more details about the history of her conservatorship here, but these are the broad strokes: In 2008, Britney Spears' father, Jamie Spears, gained control of all aspects of his daughter's life after the singer publicly struggled with her mental health. (As the Framing Britney Spears documentary brought new attention to her case, it also started some soul-searching among media types who farmed her mental health issues for tabloid headlines.) Everything from her performances to her finances to her relationships with her two now-teenage sons was under her father's control. The pop star's fans began to question the ethics and legality of the arrangement, and under the banner #FreeBritney they have sustained a lengthy campaign to see it end. During this time, Britney Spears continued working — putting out platinum-selling albums, doing TV gigs and mounting a hugely successful four-year residency in Las Vegas. She had no control over the financial arrangements of any of these projects. In a 2020 court filing, Spears asked the court to suspend her father from his role as conservator and refused to perform if he remained in charge of her career. As a result, a wealth-management company became a co-conservator for her finances, but her father presently remains the main conservator for all other aspects of Spears' life. Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
ari Read Britney Spears' Statement To The Court In Her Conservatorship Hearing By www.scpr.org Published On :: Thu, 24 Jun 2021 12:40:08 -0700 Britney Spears arrives for a movie premier in Hollywood, Calif., on July 22, 2019. On Wednesday, the singer asked a judge to end her conservatorship.; Credit: Valerie Macon/AFP via Getty Images NPR Staff | NPRBritney Spears is asking a Los Angeles Superior Court judge to end her 13-year conservatorship, saying she is being exploited, bullied and feeling "left out and alone." Below is a transcript from a leaked audio recording of part of Spears' court statement Wednesday posted on YouTube and verified by NPR. Britney Spears: I will be honest with you, I haven't been back to court in a long time because I don't think I was heard on any level when I came to court the last time. I brought four sheets of paper in my hands and wrote in length what I had been through the last four months before I came there. The people who did that to me should not be able to walk away so easily. I'll recap: I was on tour in 2018; I was forced to do. My management said if I don't do this tour I will have to find an attorney. Los Angeles Superior Court Judge Brenda Penny: Ms. Spears, Ms. Spears. I hate to interrupt you, but my court reporter is taking down what you're saying. Spears: OK. Penny: And so you have to speak a little more slowly. Spears: Oh, of course. Yes. OK. I apologize. Great. Penny: So we hear and make a record of everything you're saying. Spears: The people who did this to me should not get away and be able to walk away so easily. Recap: I was on tour in 2018. I was forced to do. My management said if I don't do this tour, I will have to find an attorney and by contract my own management could sue me if I didn't follow through with the tour. He handed me a sheet of paper as I got off the stage in Vegas and said I had to sign it. It was very threatening and scary and with the conservatorship, I couldn't even get my own attorney. So out of fear, I went ahead and I did the tour. When I came off that tour, a new show in Las Vegas was supposed to take place. I started rehearsing early, but it was hard cause I'd been doing Vegas for four years and I needed a break in between. But no, I was told this is the timeline and this is how it's gonna go. I rehearsed four to four days a week, half of the time in the studio and a half of the other time in a Westlake studio. I was basically directing most of the show with my whereabouts, where I preferred to rehearse and actually did most of the choreography, meaning I taught my dancers my new choreography myself. I take everything I do very seriously. There's tons of video with me at rehearsals. I wasn't good. I was great. I led a room of 16 new dancers in rehearsals. It's funny to hear my manager's side of the story. They all said I wasn't participating in rehearsals and I never agreed to take my medication, which my medication is only taken in the mornings, never at rehearsal. They don't even see me. So why are they even claiming that? When I said no to one dance move into rehearsals, it was as if I planted a huge bomb somewhere and I said, no, I don't want to do it this way. After that, my management, my dancers and my assistant of the new people that were supposed to do the new show all went into a room, shut the door and didn't come out for at least 45 minutes. Ma'am, I'm not here to be anyone's slave. I can say no to a dance move. I was told by my — at the time — therapist, Dr. Benson, who died, that my manager called him and then that moment and told him I wasn't cooperating or following the guidelines in rehearsals. And he also said I wasn't taking my medication, which is so dumb because I've had the same lady every morning for the past eight years give me my same medication and I'm nowhere near these stupid people. It made no sense at all. There was a week period where they — they were nice to me and they said, "I don't want to do —" And I told them, "I don't want to do the —" They, wait, no — they were nice to me. They said, if I don't want to do the new Vegas show, I don't have to cause I was getting really nervous. I said, "I can wait." It was like, they told me I could wait. It was like lifting literally 200 pounds off of me when they said I don't have to do the show anymore cause it was — I was really, really hard on myself and it was too much. I couldn't take it anymore. So I remember telling my assistant, "But you know what, I feel weird if I say no. I feel like they're going to come back and be mean to me or punish me or something." Three days later, after I said no to Vegas, my therapist sat me down in a room and said he had a million phone calls about how I was not cooperating in rehearsals and I haven't been taking my medication. All of this was a false. He — he immediately the next day put me on lithium out of nowhere. He took me off my normal meds I'd been on for five years. And lithium is a very, very strong and completely different medication compared to what I was used to. You can go mentally impaired if you take too much, if you stay on it longer than five months. But he put me on that and I felt drunk. I really couldn't even take up for myself. I couldn't even have a conversation with my mom or dad really about anything. I told them I was scared and my doctor had me on — six different nurses with this new medication come to my home, stay with me to monitor me on this new medication, which I never wanted to be on to begin with. There were six different nurse — nurses in my homes and they wouldn't let me get in my car to go anywhere for — for a month. Not only did my family not do a goddamn thing, my dad was all for it. Anything that happened to me had to be approved by my dad. And my dad only — he acted like he didn't know that I was told I had to be tested over the Christmas holidays before they sent me away when my kids went home to Louisiana. He was the one who approved all of it. My whole family did nothing. Over the two-week holiday, a lady came into my home for four hours a day, sat me down and did a psych test on me. It took forever, but I was — I was told I had to then — after that I got off — Wait. I was told — I had to then after I got a phone call from my dad saying after I did the psych test with this lady, basically saying I had failed the test or whatever — whatever. "I'm sorry, Britney, you have to listen to your doctors. They are planning to send you to a small home in Beverly Hills to do a small rehab program that we're going to make up for you. You're gonna pay $60,000 a month for this." I cried on the phone for an hour and he loved every minute of it. The control he had over someone as powerful as me as he loved the control to hurt his own daughter, 100,000%. He loved it. I packed my bags and went to that place. I worked seven days a week, no days off — which in California, the only similar thing to this is called sex trafficking, making anyone work — work against their will. Taking all their possessions away — credit card, cash, phone, passport card — and placing them in a home where they — they work with the people who live with them. They offer — they all lived in the house with me, the nurses, the 24/7 security. There — there was one chef that came there and cooked for me daily during the weekdays. They watched me change every day, naked. Morning, noon and night. My body — I had no privacy door for my — for my room. I gave eight gallons of blood a week. If I didn't do any of my meetings and work from 8 to 6 at night — which is 10 hours a day, seven days a week, no days off — I wouldn't be able to see my kids or my boyfriend. I never had a say in my schedule. They always told me I had to do this. And ma'am, I will tell you, sitting in a chair 10 hours a day, seven days a week, it ain't fun. And especially when you can't walk out the front door. And that's why I'm telling you this again two years later, after I've lied and told the whole world I'm OK and I'm happy. It's a lie. I thought I just — maybe I said that enough, maybe I might become happy because I've been in denial. I've been in shock. I am traumatized, you know, fake it till you make it. But now I'm telling you the truth, OK? I'm not happy. I can't sleep. I'm so angry. It's insane and I'm depressed. I cry every day. And the reason I'm telling you this is because I don't think how the state of California can have all this written in the court documents from the time I showed up and do absolutely nothing. Just hire — with my money — another person to keep — and keep my dad on board. Ma'am, my dad and anyone involved in this conservatorship and my management who played a huge role in punishing me when I said, "No, ma'am, they should be in jail." Their cruel tactics working for Miley Cyrus. If she smokes on joints and stage at the VMAs, nothing is ever done to this generation for doing wrong things. But my precious body, whose work for my dad for the past f***ing 13 years, trying to be so good and pretty. So perfect when he works me so hard, when I do everything I'm told, and the state of California allowed my ignorant father to take his own daughter, who only has a role with me if I work with him. They set back the whole course and allowed him to do that to me? That's given these people I've worked for way too much control. They also threatened me and said if I don't go, then I have to go to court and it will be more embarrassing me if the judge publicly makes you go, "The evidence we have, you have to go." I was advised for my image. I need to go ahead and just go and get it over with. They said that to me. I don't — I don't even drink alcohol. I — I should drink alcohol, considering what they put my heart through. Also, the Bridges Facility they sent me to none of the kids — I was doing this program for four months. So the last two months I went to a Bridges Facility. None of the kids there did the — did the program. They never showed up for any of them. You didn't have to do anything if you didn't want to. How come they always made me go? How come I was always threatened by my dad and anybody that persisted in this conservatorship? If I don't do this, what they tell me — enslave me to do, they're going to punish me. The last time I spoke to you about just keeping the conservatorship going and also keeping my dad in the loop made me feel like I was dead. Like I didn't matter. Like nothing had been done to to me. Like you thought I was lying or something. I'm telling you again, because I'm not lying. I want to feel heard and I'm telling you this again so maybe you can understand the depth and the degree and the damage that they did to me back then. I want changes and I want changes going forward. I deserve changes. I was told I have to sit down and be evaluated — again — if I want to end the conservatorship. Ma'am, I didn't know I could petition the conservatorship to end it. I'm sorry for my ignorance, but I honestly didn't know that. But honestly, which I don't think I owe anyone to be evaluated. I've done more than enough. I don't feel like I should even be in a room with anyone to offend me by trying to question my capacity of intelligence, whether I need to be in this stupid conservatorship or not. I've done more than enough. I don't owe these people anything. Especially me, the one that is roofed and fed tons of people on tour on the road. It's embarrassing and demoralizing what I've been through. And that's the main reason I've never said it openly. And mainly I didn't want to say it openly because I honestly don't think anyone would believe me. To be honest with you, the Paris Hilton story on what they did to her, at that school, I didn't believe any of it. I'm sorry, I'm an outsider. And I'll just be honest, I didn't believe it. And maybe I'm wrong. And that's why I didn't want to say any of this to anybody, to the public, because people would make fun of me or laugh at me and say, "She's lying. She's got everything. She's Britney Spears." I'm not lying. I just want my life back. And it's been 13 years and it's enough. It's been a long time since I've owned my money and it's my wish and my dream for all of this to end without being tested. Again, it makes no sense whatsoever for the state of California to sit back and literally watch me with their own two eyes, make a living for so many people and pay so many people — trucks and buses on tour on the road with me — and be told I'm not good enough. But I'm great at what I do. And I allow these people to control what I do, ma'am, and it's enough, it makes no sense at all. Now, going forward, I'm not willing to meet or see anyone. I've met with enough people against my will. I'm done. All I want is to own my money, for this to end, and my boyfriend to drive me in his f***ing car. And I would honestly like to sue my family, to be totally honest with you. I also would like to be able to share my story with the world and what they did to me instead of it being a hush hush secret to benefit all of them. I want to be able to be heard on what they did to me by making me keep this in for so long is not good for my heart. I've been so angry and I cry every day. It concerns me I'm told I'm not allowed to expose the people who did this to me. For my sanity, I need you to the judge to approve me to do an interview where I can be heard and what they did to me. And actually, I have the right to use my voice and take up for myself. My attorney says I can't. It's not good. I can't let the public know anything they did to me. And by not saying anything is saying it's OK. I don't know what I said here. It's not OK. I would actually — I don't want to interview. I'd much rather just have an open call to you for the press to hear, which I didn't know today we're doing, so thank you. Instead of having an interview, honestly, I need that to get it off my heart. The anger and all of it. That — that — that's — that's been happening. It's not fair they're telling me lies about me openly. Even my family. They do interviews to anyone they want on news stations, my own family doing interviews and talking about the situation and making me feel so stupid. And I can't say one thing. And my own people say I can't say anything. It's been two years. I want a recorded call to you — actually, we're doing this now, which I didn't know that we were doing this — until the public knows what they did me. I told my — I know my lawyer Sam has been very scared for me to go forward because he's saying if I speak up, I'm being overworked in that facility, that rehab place that the rehab place will see me. He told me I should keep it to myself. I would personally like to — actually, I know I've had grown with a personal relationship with Sam, my lawyer. I've been talking to him like three times a week now. We've kind of built a relationship, but I haven't really had the opportunity by my own self to actually handpick my own lawyer by myself. And I would like to be able to do that. I would like to also — the main reason why I'm here is because I want to end the conservatorship without having to be evaluated. I've done a lot of research, ma'am, and there is a lot of judges who do end conservatorships for people without them having to be evaluated all the time. The only times they don't is if a concerned family member says something's wrong with this person and consider an other — otherwise. And considering my family has lived off of my conservatorship for 13 years, I won't be surprised if one of them has has something to say. Go forward and say, "We don't think this should end. We have to help her." Especially if I get my fair serve and turn in exposing what they did to me. Also I want to speak to you about at the moment my obligations, which I personally don't think at the very moment, I owe anybody anything. I have three meetings a week I have to attend no matter what. I just don't like feeling like I work for the people whom I pay. I don't like being told I have to, no matter what, even if I'm sick, Jodi, the conservator says I have to see my Coach Ken even when I'm sick. I would like to do one meeting a week with a therapist. I've never in — before — even before they sent me to that place, had two therapy sessions. A therapy, one, a therapy session and one therapy session with my — I have a doctor and then a therapy person. What I've been forced to do illegal in my life, I shouldn't be told I have to be available three times a week to these people I don't know. I'm talking to you today because I feel again, yes, even Jodi is starting to kind of take it too far with me. They have me going to therapy twice a week and a psychiatrist. I've never in the past had — they had me going yeah, twice a week and my doctor goal. So that's three times a week. I've never in the past went to see a therapist more than once a week. It takes too much out of me going to this man I don't know. Number one, I'm scared of people. I don't trust people with what I've been through. And the clever set up of being in what's like, one of the most exposed places in Westlake, which today — yesterday paparazzi showed me coming out of the place, literally crying in there. It's embarrassing and it's demoralizing. I deserve privacy when I go. I deserve privacy when I go and have therapy either at my home, like I've done for eight years — they've always come to my home — or when the Dr. Benson, the guy — the man that died — I went to a place similar to what I went to in Westlake, which was very exposed and really bad. OK, so wait, where was I? It was like, it was identical to Dr. Benson who died. The one who illegally — yes, 100% — abused me by the treatment he gave me to. And to be totally honest with you, I was so — Penny: Ms. Spears, excuse me for interrupting you. But my reporter says if you could just slow down a little bit because she's trying to make sure she gets everything that you're saying. Spears: OK, cool. Penny: And so if you just —. Spears: OK. Penny: So that would be great. Spears: I have been through — and the clever set up in Westlake is identical to Dr. Benson who died, the one who illegally — yes, 100% — abused me by the treatment he gave me. And to be totally honest with you, when he passed away, I got on my knees and thanked God. In other words, my team is pushing — pushing it with me again. I have trapped phobias being in small rooms because the trauma locked me up for four months in that place is not OK for them to send me — sorry, I'm going fast — to that small room like that twice a week with another new therapist I pay that I never even approved. I don't like it. I don't want to do that. And I haven't done anything wrong to deserve this treatment. It's not OK to force me to do anything I don't want to do. By law — by law, Jodi and this so-called team should honestly — I should be able to sue them for threatening me and saying if I don't go and do these meetings twice a week, we — we can't let you have your money and go to Maui on your vacations. You have to do what you're told for this program and then you will be able to go. But it was very clever. They picked one of the most exposed places in Westlake knowing I have the hot topic of the conservatorship, that over five paparazzi are going to show up and get me crying coming out of that place. I begged them to make sure that they did this at my home so I would have privacy. I deserve privacy. The whole conservatorship from the beginning — once — the conservatorship — the conservatorship from the beginning, once you see someone, whoever it is in the conservatorship, making money, making them money and myself money and working, that whole, that whole statement right there, the conservatorship should end. There should be no — I shouldn't be in a conservatorship if I can work and provide money and work for myself and pay other people. It makes no sense. The laws need to change. What state allows people to own another person's money and account and threaten them and saying, "You can't spend your money unless you do what we want you to do." And I'm paying them. Ma'am, I've worked since I was 17 years old. You have to understand how thin that is for me. Every morning I get up to know, I can't go on somewhere unless I meet people I don't know every week in an office identical to the one where the therapist was very abusive to me. I truly believe this conservatorship is abusive. And now we can sit here all day and say, "Oh, conservatorships are here to help people." But ma'am, there's a thousand conservatorships that are abusive as well. I don't feel like I can live a full life. I don't — I don't owe them to go see a man I don't know and share him my problems. I don't even believe in therapy. I always think you take it to God. I want to end the conservatorship without being evaluated. In the meantime, I want this therapist once a week. He can either come to my home — no, I just want him to come to my home. I'm not willing to go to Westlake and be embarrassed by all these paparazzi, these scummy paparazzi laughing at my faces while I'm crying, coming out and taking my pictures as all these white, nice dinners where people drinking wine at restaurants, watching me from these places. They set me up by sending me to the most exposed places, places. And I told them I didn't want to go there because I knew paparazzi would show up there. They only gave me two options for therapist, and I'm not sure how you make your decisions, ma'am, but this is the only chance for me to talk to you for a while. I need your your help. So if you can just kind of let me know where your head is, I don't really honestly know what to say, but my requests just are to end the conservatorship without being evaluated. I want to petition, basically, to end the conservatorship, but I want to — I want it to be petitioned. And if I don't want to be evaluated, to be sat in a room with people for hours a day like they did me before, and they made it even worse for me after that happened. So I just — I'm honestly new at this and I'm doing research on all these things. I do know common sense and the method that things can end, it — for people, it has ended without them being evaluated. So I just want you to take that into consider — consideration. I've also done research and wait — also took a year during COVID to get me any self-care methods during COVID. She said there were no services available. She's lying, ma'am. My mom went to the spa twice in Louisiana during COVID. For a year, I didn't have my nails done. No hair styling and no massages, no acupuncture, nothing. For a year. I saw the maids in my home each week with their nails done different each time. She made me feel like my dad does — very similar, her behavior. And my dad, but just a different dynamic. Team wants me to work and stay home instead of having longer vacations. They — they are used to me sort of doing a weekly routine for them and I'm over it. I don't feel like I owe them anything at this point. They need to be reminded they actually work for me. They trick me by sending me to the — OK, I repeated myself there. OK. Also, I was supposed to be able to have a friend that I used to do AA meetings with. I did AA for two years, I have like, you know — I did three meetings a week and met a bunch of women there. And I'm not able to see my friends that live eight minutes away from me, which I find extremely strange. I feel like they're making me feel like I live in a rehab program. This is my home. I'd like for my boyfriend to be able to drive me in his car. And I want to meet with the therapist once a week, not twice a week. And I want him to come to my home because I actually know I do need a little therapy. I was told, hold on — I think that's — oh, and I would like to progressively move forward and I want to have the real deal. I want to be able to get married and have a baby. I was told right now in the conservatorship, I'm not able to get married or have a baby. I have an IUD inside of myself right now, so I don't get pregnant. I wanted to take the IUD out so I could start trying to have another baby. But this so-called team won't let me go to the doctor to take it out because they they don't want me to have children — any more children. So basically this conservatorship is doing me way more harm than good. I — I deserve to have a life. I've worked my whole life. I deserve to have a two- to three-year break and just, you know, do what I want to do. But I do feel like there is a crutch here and I feel like I feel open and I'm OK to talk to you today about it. But I — I wish I could stay with you on the phone forever, because when I get off the phone with you, all of a sudden all I hear — I hear all these no's. No, no, no. And then all of a sudden I get — I feel ganged up on and I feel bullied and I feel left out and alone. And I'm tired of feeling alone. I deserve to have the same rights as anybody does by having a child, a family, any of those things. And more so. And that's all I wanted to say to you. And thank you so much for letting me speak to you today. Copyright 2021 NPR. To see more, visit https://www.npr.org. This content is from Southern California Public Radio. View the original story at SCPR.org. Full Article
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