Serial crystallography experiments at synchrotron and X-ray free-electron laser (XFEL) sources are producing crystallographic data sets of ever-increasing volume. While these experiments have large data sets and high-frame-rate detectors (around 3520 frames per second), only a small percentage of the data are useful for downstream analysis. Thus, an efficient and real-time data classification pipeline is essential to differentiate reliably between useful and non-useful images, typically known as `hit' and `miss', respectively, and keep only hit images on disk for further analysis such as peak finding and indexing. While feature-point extraction is a key component of modern approaches to image classification, existing approaches require computationally expensive patch preprocessing to handle perspective distortion. This paper proposes a pipeline to categorize the data, consisting of a real-time feature extraction algorithm called modified and parallelized FAST (MP-FAST), an image descriptor and a machine learning classifier. For parallelizing the primary operations of the proposed pipeline, central processing units, graphics processing units and field-programmable gate arrays are implemented and their performances compared. Finally, MP-FAST-based image classification is evaluated using a multi-layer perceptron on various data sets, including both synthetic and experimental data. This approach demonstrates superior performance compared with other feature extractors and classifiers.

Processing of single-crystal X-ray diffraction data from area detectors can be separated into two steps. First, raw intensities are obtained by integration of the diffraction images, and then data correction and reduction are performed to determine structure-factor amplitudes and their uncertainties. The second step considers the diffraction geometry, sample illumination, decay, absorption and other effects. While absorption is only a minor effect in standard macromolecular crystallography (MX), it can become the largest source of uncertainty for experiments performed at long wavelengths. Current software packages for MX typically employ empirical models to correct for the effects of absorption, with the corrections determined through the procedure of minimizing the differences in intensities between symmetry-equivalent reflections; these models are well suited to capturing smoothly varying experimental effects. However, for very long wavelengths, empirical methods become an unreliable approach to model strong absorption effects with high fidelity. This problem is particularly acute when data multiplicity is low. This paper presents an analytical absorption correction strategy (implemented in new software AnACor) based on a volumetric model of the sample derived from X-ray tomography. Individual path lengths through the different sample materials for all reflections are determined by a ray-tracing method. Several approaches for absorption corrections (spherical harmonics correction, analytical absorption correction and a combination of the two) are compared for two samples, the membrane protein OmpK36 GD, measured at a wavelength of λ = 3.54 Å, and chlorite dismutase, measured at λ = 4.13 Å. Data set statistics, the peak heights in the anomalous difference Fourier maps and the success of experimental phasing are used to compare the results from the different absorption correction approaches. The strategies using the new analytical absorption correction are shown to be superior to the standard spherical harmonics corrections. While the improvements are modest in the 3.54 Å data, the analytical absorption correction outperforms spherical harmonics in the longer-wavelength data (λ = 4.13 Å), which is also reflected in the reduced amount of data being required for successful experimental phasing.

BL19U1, an energy-tunable protein complex crystallography beamline at the Shanghai Synchrotron Radiation Facility, has emerged as one of the most productive MX beamlines since opening to the public in July 2015. As of October 2023, it has contributed to over 2000 protein structures deposited in the Protein Data Bank (PDB), resulting in the publication of more than 1000 scientific papers. In response to increasing interest in structure-based drug design utilizing X-ray crystallography for fragment library screening, enhancements have been implemented in both hardware and data collection systems on the beamline to optimize efficiency. Hardware upgrades include the transition from MD2 to MD2S for the diffractometer, alongside the installation of a humidity controller featuring a rapid nozzle exchanger. This allows users to opt for either low-temperature or room-temperature data collection modes. The control system has been upgraded from Blu-Ice to MXCuBE3, which supports website-mode data collection, providing enhanced compatibility and easy expansion with new features. An automated data processing pipeline has also been developed to offer users real-time feedback on data quality.

Serial crystallography (SX) involves combining observations from a very large number of diffraction patterns coming from crystals in random orientations. To compile a complete data set, these patterns must be indexed (i.e. their orientation determined), integrated and merged. Introduced here is TORO (Torch-powered robust optimization) Indexer, a robust and adaptable indexing algorithm developed using the PyTorch framework. TORO is capable of operating on graphics processing units (GPUs), central processing units (CPUs) and other hardware accelerators supported by PyTorch, ensuring compatibility with a wide variety of computational setups. In tests, TORO outpaces existing solutions, indexing thousands of frames per second when running on GPUs, which positions it as an attractive candidate to produce real-time indexing and user feedback. The algorithm streamlines some of the ideas introduced by previous indexers like DIALS real-space grid search [Gildea, Waterman, Parkhurst, Axford, Sutton, Stuart, Sauter, Evans & Winter (2014). Acta Cryst. D70, 2652–2666] and XGandalf [Gevorkov, Yefanov, Barty, White, Mariani, Brehm, Tolstikova, Grigat & Chapman (2019). Acta Cryst. A75, 694–704] and refines them using faster and principled robust optimization techniques which result in a concise code base consisting of less than 500 lines. On the basis of evaluations across four proteins, TORO consistently matches, and in certain instances outperforms, established algorithms such as XGandalf and MOSFLM [Powell (1999). Acta Cryst. D55, 1690–1695], occasionally amplifying the quality of the consolidated data while achieving superior indexing speed. The inherent modularity of TORO and the versatility of PyTorch code bases facilitate its deployment into a wide array of architectures, software platforms and bespoke applications, highlighting its prospective significance in SX.

Conformational change mediates the biological functions of macromolecules. Crystallographic measurements can map these changes with extraordinary sensitivity as a function of mutations, ligands and time. A popular method for detecting structural differences between crystallographic data sets is the isomorphous difference map. These maps combine the phases of a chosen reference state with the observed changes in structure factor amplitudes to yield a map of changes in electron density. Such maps are much more sensitive to conformational change than structure refinement is, and are unbiased in the sense that observed differences do not depend on refinement of the perturbed state. However, even modest changes in unit-cell properties can render isomorphous difference maps useless. This is unnecessary. Described here is a generalized procedure for calculating observed difference maps that retains the high sensitivity to conformational change and avoids structure refinement of the perturbed state. This procedure is implemented in an open-source Python package, MatchMaps, that can be run in any software environment supporting PHENIX [Liebschner et al. (2019). Acta Cryst. D75, 861–877] and CCP4 [Agirre et al. (2023). Acta Cryst. D79, 449–461]. Worked examples show that MatchMaps `rescues' observed difference electron-density maps for poorly isomorphous crystals, corrects artifacts in nominally isomorphous difference maps, and extends to detecting differences across copies within the asymmetric unit or across altogether different crystal forms.

It is demonstrated that high-resolution energy-dispersive X-ray fluorescence mapping devices based on a micro-focused beam are not restricted to high-speed analyses of element distributions or to the detection of different grains, twins and subgrains in crystalline materials but can also be used for the detection of dislocations in high-quality single crystals. Si single crystals with low dislocation densities were selected as model materials to visualize the position of dis­locations by the spatially resolved measurement of Bragg-peak intensity fluctuations. These originate from the most distorted planes caused by the stress fields of dislocations. The results obtained by this approach are compared with laboratory-based Lang X-ray topographs. The presented methodology yields comparable results and it is of particular interest in the field of crystal growth, where fast chemical and microstructural characterization feedback loops are indispensable for short and efficient development times. The beam divergence was reduced via an aperture management system to facilitate the visualization of dislocations for virtually as-grown, non-polished and non-planar samples with a very pronounced surface profile.

Portland cements (PCs) and cement blends are multiphase materials of different fineness, and quantitatively analysing their hydration pathways is very challenging. The dissolution (hydration) of the initial crystalline and amorphous phases must be determined, as well as the formation of labile (such as ettringite), reactive (such as portlandite) and amorphous (such as calcium silicate hydrate gel) components. The microstructural changes with hydration time must also be mapped out. To address this robustly and accurately, an innovative approach is being developed based on in situ measurements of pastes without any sample conditioning. Data are sequentially acquired by Mo Kα1 laboratory X-ray powder diffraction (LXRPD) and microtomography (µCT), where the same volume is scanned with time to reduce variability. Wide capillaries (2 mm in diameter) are key to avoid artefacts, e.g. self-desiccation, and to have excellent particle averaging. This methodology is tested in three cement paste samples: (i) a commercial PC 52.5 R, (ii) a blend of 80 wt% of this PC and 20 wt% quartz, to simulate an addition of supplementary cementitious materials, and (iii) a blend of 80 wt% PC and 20 wt% limestone, to simulate a limestone Portland cement. LXRPD data are acquired at 3 h and 1, 3, 7 and 28 days, and µCT data are collected at 12 h and 1, 3, 7 and 28 days. Later age data can also be easily acquired. In this methodology, the amounts of the crystalline phases are directly obtained from Rietveld analysis and the amorphous phase contents are obtained from mass-balance calculations. From the µCT study, and within the attained spatial resolution, three components (porosity, hydrated products and unhydrated cement particles) are determined. The analyses quantitatively demonstrate the filler effect of quartz and limestone in the hydration of alite and the calcium aluminate phases. Further hydration details are discussed.

Small-angle X-ray tensor tomography and the related wide-angle X-ray tensor tomography are X-ray imaging techniques that tomographically reconstruct the anisotropic scattering density of extended samples. In previous studies, these methods have been used to image samples where the scattering density depends slowly on the direction of scattering, typically modeling the directionality, i.e. the texture, with a spherical harmonics expansion up until order ℓ = 8 or lower. This study investigates the performance of several established algorithms from small-angle X-ray tensor tomography on samples with a faster variation as a function of scattering direction and compares their expected and achieved performance. The various algorithms are tested using wide-angle scattering data from an as-drawn steel wire with known texture to establish the viability of the tensor tomography approach for such samples and to compare the performance of existing algorithms.

X-ray ptychography is a lensless imaging technique that visualizes the nano­structure of a thick specimen which cannot be observed with an electron microscope. It reconstructs a complex-valued refractive index of the specimen from observed diffraction patterns. This reconstruction problem is called phase retrieval (PR). For further improvement in the imaging capability, including expansion of the depth of field, various PR algorithms have been proposed. Since a high-quality PR method is built upon a base PR algorithm such as ePIE, developing a well performing base PR algorithm is important. This paper proposes an improved iterative algorithm named CRISP. It exploits subgradient projection which allows adaptive step size and can be expected to avoid yielding a poor image. The proposed algorithm was compared with ePIE, which is a simple and fast-convergence algorithm, and its modified algorithm, rPIE. The experiments confirmed that the proposed method improved the reconstruction performance for both simulation and real data.

Compared with batch and vapor diffusion methods, counter diffusion can generate larger and higher-quality protein crystals yielding improved diffraction data and higher-resolution structures. Typically, counter-diffusion experiments are conducted in elongated chambers, such as glass capillaries, and the crystals are either directly measured in the capillary or extracted and mounted at the X-ray beamline. Despite the advantages of counter-diffusion protein crystallization, there are few fixed-target devices that utilize counter diffusion for crystallization. In this article, different designs of user-friendly counter-diffusion chambers are presented which can be used to grow large protein crystals in a 2D polymer microfluidic fixed-target chip. Methods for rapid chip fabrication using commercially available thin-film materials such as Mylar, propyl­ene and Kapton are also detailed. Rules of thumb are provided to tune the nucleation and crystal growth to meet users' needs while minimizing sample consumption. These designs provide a reliable approach to forming large crystals and maintaining their hydration for weeks and even months. This allows ample time to grow, select and preserve the best crystal batches before X-ray beam time. Importantly, the fixed-target microfluidic chip has a low background scatter and can be directly used at beamlines without any crystal handling, enabling crystal quality to be preserved. The approach is demonstrated with serial diffraction of photoactive yellow protein, yielding 1.32 Å resolution at room temperature. Fabrication of this standard microfluidic chip with commercially available thin films greatly simplifies fabrication and provides enhanced stability under vacuum. These advances will further broaden microfluidic fixed-target utilization by crystallographers.

VMXm joins the suite of operational macromolecular crystallography beamlines at Diamond Light Source. It has been designed to optimize rotation data collections from protein crystals less than 10 µm and down to below 1 µm in size. The beamline has a fully focused beam of 0.3 × 2.3 µm (vertical × horizontal) with a tuneable energy range (6–28 keV) and high flux (1.6 × 1012 photons s−1 at 12.5 keV). The crystals are housed within a vacuum chamber to minimize background scatter from air. Crystals are plunge-cooled on cryo-electron microscopy grids, allowing much of the liquid surrounding the crystals to be removed. These factors improve the signal-to-noise during data collection and the lifetime of the microcrystals can be prolonged by exploiting photoelectron escape. A novel in vacuo sample environment has been designed which also houses a scanning electron microscope to aid with sample visualization. This combination of features at VMXm allows measurements at the physical limits of X-ray crystallography on biomacromolecules to be explored and exploited.

Geological samples are inherently multi-scale. Understanding their bulk physical and chemical properties requires characterization down to the nano-scale. A powerful technique to study the three-dimensional microstructure is X-ray tomography, but it lacks information about the chemistry of samples. To develop a methodology for measuring the multi-scale 3D microstructure of geological samples, correlative X-ray micro- and nanotomography were performed on two rocks followed by scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS) analysis. The study was performed in five steps: (i) micro X-ray tomography was performed on rock sample cores, (ii) samples for nanotomography were prepared using laser milling, (iii) nanotomography was performed on the milled sub-samples, (iv) samples were mounted and polished for SEM analysis and (v) SEM imaging and compositional mapping was performed on micro and nanotomography samples for complimentary information. Correlative study performed on samples of serpentine and basalt revealed multiscale 3D structures involving both solid mineral phases and pore networks. Significant differences in the volume fraction of pores and mineral phases were also observed dependent on the imaging spatial resolution employed. This highlights the necessity for the application of such a multiscale approach for the characterization of complex aggregates such as rocks. Information acquired from the chemical mapping of different phases was also helpful in segmentation of phases that did not exhibit significant contrast in X-ray imaging. Adoption of the protocol used in this study can be broadly applied to 3D imaging studies being performed at the Advanced Light Source and other user facilities.

In synchrotron X-ray radiography, achieving high image resolution and an optimal signal-to-noise ratio (SNR) is crucial for the subsequent accurate image analysis. Traditional methods often struggle to balance these two parameters, especially in situ applications where rapid data acquisition is essential to capture specific dynamic processes. For quantitative image data analysis, using monochromatic X-rays is essential. A double multilayer monochromator (DMM) is successfully used for this aim at the BAMline, BESSY II (Helmholtz Zentrum Berlin, Germany). However, such DMMs are prone to producing an unstable horizontal stripe pattern. Such an unstable pattern renders proper signal normalization difficult and thereby causes a reduction of the SNR. We introduce a novel approach to enhance SNR while preserving resolution: dynamic tilting of the DMM. By adjusting the orientation of the DMM during the acquisition of radiographic projections, we optimize the X-ray imaging quality, thereby enhancing the SNR. The corresponding shift of the projection during this movement is corrected in post-processing. The latter correction allows a good resolution to be preserved. This dynamic tilting technique enables the homogenization of the beam profile and thereby effectively reduces noise while maintaining high resolution. We demonstrate that data captured using this proposed technique can be seamlessly integrated into the existing radiographic data workflow, as it does not need hardware modifications to classical X-ray imaging beamline setups. This facilitates further image analysis and processing using established methods.

Conic sections are commonly used in reflective X-ray optics. Hyperbolic mirrors can focus a converging light source and are frequently paired with elliptical or parabolic mirrors in Wolter type configurations. This paper derives the closed-form expression for a mirror-centered hyperbolic shape, with zero-slope at the origin. Combined with the slope and curvature, such an expression facilitates metrology, manufacturing and mirror-bending calculations. Previous works consider ellipses, parabolas, magnifying hyperbolas or employ lengthy approximations. Here, the exact shape function is given in terms of the mirror incidence angle and the source and image distances.

The RSS feed for Noteworthy Chemistry has been discontinued. Questions or concerns? Email us!

Liam Neeson stars as Matthew Scudder in "A Walk Among the Tombstones." ; Credit: Universal Pictures

Screenwriter and director Scott Frank has been trying to make “A Walk Among the Tombstones” for more than a decade, but it wasn't until Liam Neeson signed on that his efforts finally came into view.

Based on the Lawrence Block novel, “Tombstones” stars Liam Neeson as Matthew Scudder, an ex-cop working as an unlicensed private investigator. He agrees to help a well-to-do drug trafficker hunt down the kidnappers who have brutally murdered his wife.

Frank wrote the screenplay and, after the departures of other attached directors, Frank decided to step behind the cameras himself. 

When he came by The Frame studio, Frank spoke with host John Horn about Neeson's great strengths as an action hero and how he convinced Neeson to sign on to the project.

Interview Highlights:

John Horn: Liam Neeson has evolved in a fascinating way as an action hero. When did you start having conversations with him about this movie, and what was it about him as an actor that made it feel like the right fit?

"Well, what's interesting is that Larry Block, the novelist, had always said, going way back to 2003 or something, that the perfect actor for this, after [he saw] 'Michael Collins'...would be Liam Neeson. Chris Andrews, who is Liam's agent, always loved the script and was always trying to find a way to put it together, and he's the one who gave it to Liam back when D.J. [Caruso] was going to direct. So the first time I met Liam to talk about the movie, I was talking to him as the writer, not as the director of the movie. And then when D.J. fell out to go do a different movie at Sony...we had a conversation about directing the movie.

JH: Was this before or after the first "Taken" had come out?

This was well after the first 'Taken,' this was right before the second 'Taken.'

JH: So Liam is...succeeding as a version of that character, and I wonder if that success cuts both ways, that maybe there's a reluctance on his part to not do something that's quite as similar? Or is that part of your conversation that you have with him? 

It absolutely cuts both ways, and that was a huge part of the conversation because there's a kidnapping in this story, and there he is on the telephone for a few minutes at the end of the movie talking to kidnappers, and there are similarities [to 'Taken']. And he knew that was the way to sell the movie, and so he was very reluctant. And I talked to him and I had him watch 'Klute,' and I said, "That's the movie we're gonna make. We're not going to make 'Taken,' we're going to make a movie that's like 'Klute,' or a little bit like 'Dirty Harry,' or one of those old-school '70s films. It's going to feel more like that than an action movie."

JH: Liam Neeson's not physically imposing, but there's something about him that really kind of makes the hair on the back of your neck stand up. What is it about him as an actor in this kind of part?

Well, there's a couple things. One: you believe him. No matter what he's talking about, it seems authentic and true...he has this thing about him that, whatever he's doing, you believe him. Two: he's one of those actors like Gene Hackman where he can convey exposition and make it feel like character. He can talk pages of exposition and make it all feel like it's character and drama — it's a great thing. The other thing about him is that he has this real gravitas, and it almost borders on sadness sometimes; it's interesting when you watch him and you feel like there's all this other life going on behind him.

JH: That he has nothing to lose, in other words.

Nothing to lose, and he says that at one point in the film, but I think it's those things that are all at work at the same time.

Source: Streetwise Reports 11/07/2024

Jericho Energy Ventures Inc. (JEV:TSX.V; JROOF:OTC; JLM:FRA) has announced a strategic move to spin off its hydrogen solutions platform into a separate entity. The new entity, to be named Hydrogen Technologies Corp. (HTC), was approved by the company's board of directors. The intention is to create two specialized companies focusing on hydrogen technology and traditional energy assets, respectively. Each Jericho Energy shareholder will retain their Jericho shares while receiving shares of the new HTC entity on a pro-rata basis in consideration of the transfer of Jericho's hydrogen assets.

The planned transaction, still subject to regulatory and shareholder approvals, aims to allow both companies to focus on their distinct markets and strategies. Jericho Energy expects this restructuring to enable each company to operate with tailored capital structures and investment plans, positioning them for growth within their specific sectors. The final terms of the spinout will be detailed in a management information circular to be shared with shareholders before they vote on the proposal.

Approval processes for the spinout include a review by the TSX Venture Exchange, shareholder consent, and possibly court approval in British Columbia if the plan proceeds via a formal arrangement. Jericho's CEO, Brian Williamson, noted in the news release, "By separating our hydrogen platform, we can create two agile, focused companies . . . positioning them for long-term growth and success."

Jericho Energy, which will continue trading on the TSX Venture Exchange under the symbol JEV, will retain its traditional oil and gas assets following the separation. The company's annual general meeting on January 15, 2025, may serve as a venue for shareholder approval, or a separate meeting may be scheduled.

Hydrogen Energy and Clean Tech

Energy Storage, in its November 5 report, underscored the growth potential for green hydrogen in the U.S. Supported by the government's US$7 billion Regional Clean Hydrogen Hubs program, this program aimed to boost clean hydrogen production and reduce costs. The report noted that the Mid-Atlantic Hydrogen Hub (MACH2) anticipated large-scale green hydrogen projects, generating over 20,000 jobs and incorporating hydrogen applications across sectors like steel, aviation, and maritime.

On November 6, Reuters reported that despite political shifts, U.S. clean energy momentum continues to be driven by federal tax credits and technology advancements. Renewable energy sources, including hydrogen, were identified as the fastest-growing segments on the power grid, benefiting from initiatives like the Inflation Reduction Act (IRA) and state mandates. Carl Fleming, a partner at McDermott Will & Emery, highlighted that "the jobs and the economic benefits have been so heavy in red states, it's hard to see an administration come in that says we don't like this." Although political challenges might impact renewable sectors like offshore wind, the trajectory of clean energy, including hydrogen, remained strong due to market demand and state-level support.

The International Energy Agency's (IEA) 2024 Global Hydrogen Review reported that global hydrogen demand reached 97 Mt (metric tons) in 2023. This demand was projected to approach 100 Mt in 2024. The IEA highlighted a rising focus on low-emissions hydrogen, particularly for refining and heavy industries. Although new applications in transport and energy storage accounted for less than 1% of global demand, industry interest grew, with chemical, refining, and shipping sectors making strides in contracting low-emissions hydrogen. The IEA also noted substantial investments in electrolyzer projects worldwide, with installed capacity expected to grow significantly.

Jericho's Catalysts

According to Jericho Energy's April 2024 investor presentation, the spinout of Hydrogen Technologies Corp. aligns with a broader strategy to drive advancements in hydrogen technology. Currently, an area experiencing significant momentum due to global energy transition efforts, the investor presentation highlights key growth drivers, including Jericho’s patented hydrogen-based boiler technology and emerging partnerships with institutions and companies across the hydrogen sector. [OWNERSHIP_CHART-7025]

The decision to separate hydrogen assets positions HTC to capture opportunities within the rapidly expanding hydrogen ecosystem, benefiting from policy support and rising market demand for green energy solutions. As part of its strategy, Jericho intends to leverage its expertise in traditional energy systems while directing resources to support innovation in hydrogen applications.

Ownership and Share Structure

Around 35% of Jericho's shares are held by management, insiders, and insider institutional investors, the company said. They include CEO Brian Williamson, who owns 1.19% or about 3.1 million shares; founder Allen Wilson, who owns 0.76% or about 1.97 million shares; and board member Nicholas Baxter, who owns 0.44%, or about 1.14 million shares, according to Refinitiv' latest research.

Around 10% of shares are held by non-insider institutions, and approximately 55% are in retail, the company said.

On March 6, 2023, JEV completed an insider-led private placement financing, above the current share price, for gross proceeds of CA$2.23 million.

JEV's market cap is CA$25.19 million, and it trades in a 52-week range of CA$0.07 and CA$0.18. It has 259.75 million shares outstanding, approx.. 189.99 million floating.

Sign up for our FREE newsletter at: www.streetwisereports.com/get-news

Important Disclosures:

1. As of the date of this article, officers and/or employees of Streetwise Reports LLC (including members of their household) own securities of Jericho Energy Ventures Inc.
2. James Guttman wrote this article for Streetwise Reports LLC and provides services to Streetwise Reports as an employee.
3. This article does not constitute investment advice and is not a solicitation for any investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Each reader is encouraged to consult with his or her personal financial adviser and perform their own comprehensive investment research. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company.

For additional disclosures, please click here.

( Companies Mentioned: JEV:TSX.V; JROOF:OTC; JLM:FRA, )

Full Text:

What an animal eats is a fundamental aspect of its biology, but surprisingly, the evolution of diet had not been studied across the animal kingdom until now. Scientists at the University of Arizona report several unexpected findings from taking a deep dive into the evolutionary history of more than one million animal species and going back 800 million years, when the first animals appeared on our planet. The study revealed several surprising key insights: Many species living today that are carnivorous, meaning they eat other animals, can trace this diet back to a common ancestor more than 800 million years ago; A plant-based, or herbivorous, diet is not the evolutionary driver for new species that it was believed to be; Closely related animals tend to share the same dietary category -- plant-eating, meat-eating, or both. This finding implies that switching between dietary lifestyles is not something that happens easily and often over the course of evolution.

Image credit: Daniel Stolte/UANews

Bill Cosby exits the Montgomery County Courthouse in Norristown, Pa., Saturday, June 17, 2017. ; Credit: Matt Rourke/AP

Pennsylvania’s highest court overturned. Bill Cosby’s sex assault conviction Wednesday after finding an agreement with a previous prosecutor prevented him from being charged in the case.

Cosby has served more than two years of a three- to 10-year sentence at a state prison near Philadelphia. He had vowed to serve all 10 years rather than acknowledge any remorse over the 2004 encounter with accuser Andrea Constand.

We dive into how this all happened, through the lens of law, celebrity and the MeToo movement. 

With files from the Associated Press

Guests: 

Ambrosio Rodriguez, former prosecutor; he is currently a criminal defense attorney at The Rodriguez Law Group in Los Angeles; he led the sex crimes team and was in the homicide unit in the Riverside D.A.’s office; he tweets at @aer_attorney

Laurie L. Levenson, professor of criminal law at Loyola Law School in Los Angeles and former federal prosecutor

This content is from Southern California Public Radio. View the original story at SCPR.org.

A homeless encampment is pictured at Venice Beach, on June 30, 2021 in Venice, California, where an initiative began this week offering people in homeless encampments a voluntary path to permanent housing.; Credit: FREDERIC J. BROWN/AFP via Getty Images

The majority of unhoused women across the nation — 57% according to recent data — say domestic violence is the direct cause of losing their permanent home. 

In L.A, almost 40% of women who are homeless say they’ve experienced abuse in the last 12 months.

The choice they’ve been forced to make: Stay in danger with their abusers — or escape, with nowhere to go.

“It’s like jumping from a burning building but there’s no net to catch you,” said Nikki Brown, a survivor and advocate.

There are many, complex reasons why survivors become homeless. Shame is one of them. Yet studies show that one in three women experience some form of intimate partner abuse in their lives. So why don’t we talk about it more?

“It's the greatest secret that's super common and nobody wants to admit it,” said Brown. “There are so many complicated circumstances that make it really hard to leave. And when you can't leave, that element of shame and blame is the thing that makes it so hard to talk about.”

Today on AirTalk, we’re learning more about reporter Julia Paskin’s series Pushed Out, on domestic violence and homelessness in Los Angeles. Do you have an experience you want to share? Give us a call at 866-893-5722.

Guests:

Julia Paskin, KPCC producer and reporter who created the “Pushed Out” series; she tweets @JuliaPaskinInc

Amy Turk, CEO of Downtown Women’s Center, which advocates and offers services for women experiencing homelessness and formerly homeless women; she tweets @AmyFTurk

Nikki Brown, staff attorney at Community Legal Aid SoCal, where she has clients that are domestic violence survivors

This content is from Southern California Public Radio. View the original story at SCPR.org.

Athletes compete during the cycling portion of the IRONMAN 70.3 Steelhead on June 27, 2021 in Benton Harbor, Michigan. ; Credit: Patrick McDermott/Getty Images for IRONMAN

Whether you’re new to running or you’ve finished your tenth triathlon, we want to hear from you about what motivates you and how that translates into pushing yourself physically. 

Guests: 

Mark Remy, longtime runner and writer in Portland, Oregon; creator of humor website dumbrunner.com; he is the author of many books, including The Runner's Rule Book: Everything a Runner Needs to Know--And Then Some (Runner's World) (Rodale Books, 2009)

Sharon McNary, infrastructure correspondent at KPCC; she finished her 11th Ironman Race last week at Coeur d’Alene; she tweets @KPCCsharon

This content is from Southern California Public Radio. View the original story at SCPR.org.

October 2024 issue of the Idaho Hydrologic Update from the USGS Idaho Water Science Center.

Edgar Wright attends the 55th Annual International Cinematographers Guild Publicists Awards at The Beverly Hilton Hotel on March 2, 2018 in Beverly Hills, California.; Credit: Tommaso Boddi/Getty Images

The joke about Sparks — if you’ve even heard of them — is that it’s the best British band to come out of America. That confusion is why Edgar Wright, the director of “Baby Driver” and “Shaun of the Dead,” wanted to make his first documentary about the group, headed by brothers Ron and Russell Mael. Quite simply, Wright was tired of explaining who the band was and why he loves them. His documentary, called “The Sparks Brothers,” premiered at this year’s Sundance Film Festival. John Horn talked with Wright after its January premiere about his personal connection to the band, how he connected with the brother, the editing process of the documentary and more. The film is in theaters now.

With guest host John Horn

Guest: 

Edgar Wright, director of the new documentary “The Sparks Brothers;” he tweets @edgarwright

This content is from Southern California Public Radio. View the original story at SCPR.org.

This Buy-rated Canadian explorer-developer is working to achieve first mover status in this emerging clean energy space. Find out what all it has done and is doing.

On-Demand Webinar >  Watch Now!>> SPONSORED BY: VM6 SoftwareWatch this FREE on-demand webinar now and you’ll discover:Why virtualization is important How to achieve a scala...

This Buy-rated Canadian explorer-developer is working to achieve first mover status in this emerging clean energy space. Find out what all it has done and is doing.

Jericho Energy Ventures Inc. (JEV:TSX.V; JROOF:OTC; JLM:FRA) has announced a strategic move to spin off its hydrogen solutions platform into a separate entity. Read more on how this transition aims to unlock growth in both hydrogen and traditional energy sectors.

Halima Aden attends the premiere of Netflix's Travis Scott: Look Mom I Can Fly at Barker Hangar on Aug. 27, 2019, in Santa Monica, Calif.; Credit: Rich Fury/Getty Images

For Halima Aden, the decision to walk away from a career as the world's first hijab-wearing supermodel was fairly clear cut. She's felt used for so long, she says — by the modeling industry and by UNICEF, the organization she was photographed by as a child in a refugee camp in Kenya and later served as an ambassador for.

Aden has been featured on the covers of Vogue, Elle and Allure magazines. And she walked the runway for Rihanna's Fenty Beauty and Kanye West's Yeezy.

She tells Morning Edition host Rachel Martin she wanted to be a role model for young girls while being true to herself, but she wasn't accomplishing either. Modeling, she realized, was in "direct conflict" with who she is.

"I'm not a cover girl, I'm Halima from Kakuma," she says. "I want to be the reason why girls have confidence within themselves, not the reason for their insecurity."

Aden was raised in the Kakuma refugee camp in northwestern Kenya. She and her family moved to Minnesota in 2004 when she was 7.

It was there her journey as a model began, competing for Miss Minnesota USA in 2016, seeking a scholarship. She finished in the semifinals, and says from there, modeling "fell from the sky" into her lap.

Interview Highlights

You saw [modeling] not just as a chance to wear gorgeous clothes and to have your photo in magazines but also as a way to help people.

Growing up in America, not seeing representation, not seeing anybody who dressed like me look like me, it did make me feel like, wow, what's wrong with me, you know? And I'm sure if I had if I would have had representation growing up, I would have been so much more confident to wear my hijab, to be myself, to be authentic. But to be that person, to grow up and be on the cover of magazines, I've covered everything from Vogue to Allure, some of the biggest publications in fashion. And yet I still couldn't relate personally to my own image because that's not who I really am. That's not how I really dress. That's not how my hijab really looks. And, you know, fashion, it can be a very creative field, and I completely appreciate that. But my hijab was just getting spread so thin that I knew I had to give it all away, give it up. I'm not a cover girl. I am Halima from Kakuma. I want to be the reason why girls have confidence within themselves, not the reason for their insecurity.

When you say your hijab was being kind of styled out of existence, what passed for a hijab as you were walking down those runways?

Everything. Oh, my goodness. I had jeans at one point on my head as a hijab. I had Gucci pants styled as a turban. It just didn't even make sense, and I felt so far removed from the image itself.

During the pandemic you decided to walk away from fashion and UNICEF. Was it a complicated decision?

I'll be honest with you, the feelings that I've had towards the fashion industry and UNICEF, it was just multiplying as the years went on, so it was just festering. You know, because the fashion industry is very known to use these young girls and boys while their young, age 14 to like 24, I think is the average career of a model. And then they just replace them and move on to a newer model. And same with UNICEF. They've been photographing me and using me since the time I was a baby in a refugee camp. I remember getting those headshots taken and it made me feel, it's very dehumanizing. And so I wanted to show UNICEF, too. How does it feel to be used? It's not a good feeling. And so let's stop using people.

What are you going to do [next]?

For me right now, I don't know what's next. And that's OK. That's OK, because I'm young and I have time to figure it out. And I'm grateful. I'm grateful to the people that I've met. I'm grateful to the agents that I worked with. I'm grateful for the experiences I was able to have these last four years. But at the same time, I just am also grateful that I don't have to do that anymore because it was in direct conflict with who I am as an individual, as a human being.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Global Analyst Adrian Day reviews results from two high-quality companies, a gold miner and a global blue chip. He also looks at changes in gold trends.

Bill Cosby gestures outside his home in Elkins Park, Pa., on June 30, 2021, after being released from prison when the Pennsylvania's supreme court overturned his sexual assault conviction. Cosby expressed support for former TV co-star Phylicia Rashad's freedom of speech after she defended him in a tweet.; Credit: Matt Rourke/AP

Bill Cosby called on Howard University to support former co-star Phylicia Rashad's freedom of speech after she expressed support for him when his sexual assault conviction was overturned.

In a statement, Cosby also lashed out at the media, comparing journalists to the rioters who stormed the Capitol in January.

"Howard University you must support ones Freedom of Speech (Ms. Rashad), which is taught or suppose to be taught everyday at that renowned law school, which resides on your campus," Cosby said in a statement provided to NPR by his spokesman Andrew Wyatt.

"This mainstream media has become the Insurrectionists, who stormed the Capitol," Cosby continued in his statement. "Those same Media Insurrectionists are trying to demolish the Constitution of these United State of America on this Independence Day."

Cosby concluded by saying, "WE THE PEOPLE STAND IN SUPPORT OF MS. PHYLICIA RASHAD" in all caps.

Cosby's support of Rashad comes after the actress, who played his TV wife in The Cosby Show, defended the comedian in a tweet. Cosby was released from prison last week when the Pennsylvania Supreme Court vacated his sexual assault conviction on the grounds that his due process rights were violated.

"FINALLY!!!! A terrible wrong is being righted- a miscarriage of justice is corrected!" Rashad said last week.

The tweet has since been removed and Rashad later backpedaled, writing that she "fully support survivors of sexual assault coming forward." She also sent a letter of apology to Howard students

Many Howard alumni had expressed disappointment at the remarks. Howard University responded with its own tweet, stating that Dean Rashad's "initial tweet lacked sensitivity towards survivors of sexual assault."

Rashad was recently named Dean of Howard University's Chadwick Boseman College of Fine Arts.

Rashad, an acclaimed stage and screen artist, graduated from Howard magna cum laude in 1970 with a bachelor's in fine arts. She returned as a guest lecturer and adjunct faculty member.

In a statement announcing her appointment in May, Provost Anthony K. Wutoh said Rashad's "passion for the arts and student success makes her a perfect fit for this role."

One of the students Rashad mentored at Howard was the late actor Chadwick Boseman, for whom the school's College of Fine Arts is named.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Children learn their habits, attitudes and beliefs from their parents and other caregivers, and that includes their willingness to try new and healthy foods. The American Dietetic Association and Catawba County Women, Infants, and Children (WIC) encourages adults to be good role models and teach children how to appreciate nutrition and enjoy healthful eating.

Area youth participating in the NC Cooperative Extension�s 4-H program helped children at Catawba County Public Health plant vegetable seeds. The activity was one of a series of visits by local North Carolina Cooperative Extension staff and volunteers to Public Health�s Women, Infants and Children (WIC) clinic designed to encourage WIC families to grow and eat fresh vegetables.

A new agreement extends borrowing privileges at Lenoir-Rhyne University Library to registered users of Hickory Public and Catawba County Libraries.

While the U.S. Environmental Protection Agencys guideline for protecting the public from a toxic form of mercury is justifiable based on the latest scientific evidence, some children of women who consume large amounts of fish and seafood during pregnancy may be at special risk of neurological problems.

No single approach -- technical, legal, economic, or educational -- will be sufficient to protect children from online pornography.

To meet the bodys daily energy and nutritional needs while minimizing risk for chronic disease, adults should get 45 percent to 65 percent of their calories from carbohydrates, 20 percent to 35 percent from fat, and 10 percent to 35 percent from protein.

A new report from the Institute of Medicine finds suggestive but limited evidence that exposure to Agent Orange and other herbicides used during the Vietnam War is associated with an increased chance of developing high blood pressure in some veterans.

A growing amount of scientific evidence indicates that how much weight women gain during pregnancy and their starting weight at conception can affect their health and that of their babies, says a new report from the Institute of Medicine and the National Research Council.

Hydraulic fracturing has a low risk for inducing earthquakes that can be felt by people, but underground injection of wastewater produced by hydraulic fracturing and other energy technologies has a higher risk of causing such earthquakes, says a new report from the National Research Council.

Rates of physical and sexual abuse of children have declined over the last 20 years, but for reasons not fully understood, says a new report from the Institute of Medicine. Yet, reports of psychological and emotional child abuse have risen in the same period, and data vary significantly as to whether child neglect is increasing, decreasing, or remaining constant.

A new report from the National Research Council has upheld the listing of formaldehyde as “known to be a human carcinogen” in the National Toxicology Program 12th Report on Carcinogens (RoC).

While scientists have made remarkable advancements in astronomy and astrophysics since the beginning of this decade – notably the first detection of gravitational waves and the discovery of distant Earth-like planets – unforeseen constraints have slowed progress toward reaching some of the priorities and goals outlined in the Academies’ 2010 decadal survey of these disciplines, says a new report from the National Academies of Sciences, Engineering, and Medicine.

Given the current state of quantum computing and the significant challenges that still need to be overcome, it is highly unlikely that a quantum computer that can compromise public-key cryptography – a basis for the security of most of today’s computers and networks – will be built within the next decade, says a new report by the National Academies of Sciences, Engineering, and Medicine.

The National Academies today released Criteria for Selecting the Leading Health Indicators for Healthy People 2030, the first of two reports that will help inform the development of Healthy People 2030 (HP2030).

Healthy People 2030 (HP2030) – which will set national objectives for improving the health of all Americans from 2020 to 2030 – should include in its Leading Health Indicators (LHIs) voting as a measure of civic engagement, the health effects of climate change, and indicators of racial and ethnic residential segregation, says a new report from the National Academies of Sciences, Engineering, and Medicine.

NASA, NSF, and NOAA have made substantial progress in implementing the programs recommended in the 2013 decadal survey on solar and space physics (heliophysics) despite a challenging budgetary landscape, says a new midterm assessment from the National Academies of Sciences, Engineering, and Medicine.

Only about 4 million people live in the Arctic, but despite its relatively small population, the region is hugely consequential.

The National Academies of Sciences, Engineering, and Medicine announced today that, following a national search, Tina Bahadori will join the organization as the new executive director of its Division on Engineering and Physical Sciences on June 22, 2020.

A new rapid expert consultation from the Societal Experts Action Network identifies promising strategies to make the adoption of protective behaviors against COVID-19, such as wearing a mask or regularly washing your hands, more likely.

In addition to jet propellant 8 (JP8), the U.S. Army should incorporate the use of diesel and renewable biodiesel as the primary sources of energy brought to the battlefield through 2035 to maximize warfighting capabilities, says a new report from the National Academies of Sciences, Engineering, and Medicine.