hot Contractors Discuss Today’s Hottest Commercial Segments By www.floortrendsmag.com Published On :: Sun, 01 Jun 2014 00:00:00 -0400 Unlike the residential market, which is essentially single family housing and most often dealing with remodels, the commercial sector is a vast sea of segments, ranging anywhere from corporate offices to healthcare to education to hospitality to retail to government/military and technically anything else not handled by the typical neighborhood retailer. Full Article
hot Booking hotel apps advice? By www.flyertalk.com Published On :: Wed, 30 Oct 2024 14:54:42 GMT Hey all! Im gearing up for an upcoming trip and could really use some recommendations on the top apps or websites for finding quality hotels at budget-friendly prices. If youve had a good experience with any booking platforms in terms of cost,... Full Article Hotel Deals
hot Dunraven Arms Hotel Adare, Ireland 20 By www.flyertalk.com Published On :: Wed, 06 Nov 2024 17:35:17 GMT [size=13px]Dunraven Arms Hotel Adare, Ireland 20. Only available on 19-20 November 2024. [/size] Image: Full Article Hotel Deals
hot Carbon dioxide chiller provides ample cold for dairy and replaces propane heat for hot water By www.foodengineeringmag.com Published On :: Wed, 23 Feb 2022 15:00:00 -0500 With this carbon dioxide chiller installed at a dairy, not only does it cool the milk better, it also provides heat for washing equipment. Full Article
hot Las Vegas hotels face lawsuit over inflated room rates By www.flyertalk.com Published On :: Fri, 01 Nov 2024 16:44:02 GMT Quite interesting lawsuit which can have far-reaching consequences, I hope. "At the heart of the lawsuit, Gibson et al. v. Cendyn Group, is the claim that several prominent hotels collaborated with Cendyn, a revenue management software provider,... Full Article Travel News
hot Photo Upload Stuck at 90% By www.flyertalk.com Published On :: Wed, 23 Oct 2024 08:55:56 GMT Tried on multiple networks and multiple photos to post a single photo, but Upload Progress gets stuck at 90. Full Article Technical Support and Feedback
hot Manhattan hotel with relatively quiet rooms By www.flyertalk.com Published On :: Wed, 30 Oct 2024 10:11:08 GMT I was born a light sleeper, so unfortunately, everything wakes me up. I lived in Manhattan for years so I know quiet is tough to find, even on high floors. I was hoping for relative quiet: maybe rooms facing the a brick wall in the back or at least... Full Article Luxury Hotels and Travel
hot Identity, belonging and place attachment amongst Pacific Island children: a photographic analysis. By ezproxy.scu.edu.au Published On :: Sat, 01 Apr 2023 00:00:00 -0400 Children's Geographies; 04/01/2023(AN 163915531); ISSN: 14733285Academic Search Premier Full Article SAMOA NEW Zealand PLACE attachment (Psychology) ISLANDS POLYSEMY COMMUNITIES
hot 'This is Not a Photograph of Zuko': how agential realism disrupts child-centred notions of agency in digital play research. By ezproxy.scu.edu.au Published On :: Thu, 01 Jun 2023 00:00:00 -0400 Children's Geographies; 06/01/2023(AN 164286260); ISSN: 14733285Academic Search Premier Full Article SOUTH Africa REALISM EYE tracking SPACETIME PHOTOGRAPHS PHILOSOPHERS THEORY of knowledge
hot Where are preschoolers active in childcare centers? A hot-spot analysis using GIS, GPS and accelerometry data. By ezproxy.scu.edu.au Published On :: Tue, 01 Aug 2023 00:00:00 -0400 Children's Geographies; 08/01/2023(AN 167303410); ISSN: 14733285Academic Search Premier Full Article PRESCHOOL children GLOBAL Positioning System PHYSICAL activity ACCELEROMETRY GEOGRAPHIC information systems PLAY environments CHILD care
hot Picturing broader socioeconomic conditions: introducing demographic data to participatory photo mapping in order to help youth understand community stratification. By ezproxy.scu.edu.au Published On :: Thu, 01 Aug 2024 00:00:00 -0400 Children's Geographies; 08/01/2024(AN 178911403); ISSN: 14733285Academic Search Premier Full Article SOCIAL scientists SOCIAL perception GEOGRAPHIC information systems SOCIAL influence PARTICIPANT observation
hot Antipsychotic Drugs: A Concise Review of History, Classification, Indications, Mechanism, Efficacy, Side Effects, Dosing, and Clinical Application By ifp.nyu.edu Published On :: Sat, 12 Oct 2024 21:02:32 +0000 The post Antipsychotic Drugs: A Concise Review of History, Classification, Indications, Mechanism, Efficacy, Side Effects, Dosing, and Clinical Application was curated by information for practice. Full Article History
hot Communist psychology in Argentina: Transnional politics, scientific culture, and psychotherapy (1935‐1991) Luciano Nicolás García Springer. 2022. pp. 208. $109 (cloth). ISBN: 978‐3‐031‐15620‐5 By ifp.nyu.edu Published On :: Wed, 23 Oct 2024 20:26:58 +0000 The post Communist psychology in Argentina: Transnional politics, scientific culture, and psychotherapy (1935‐1991) Luciano Nicolás García Springer. 2022. pp. 208. $109 (cloth). ISBN: 978‐3‐031‐15620‐5 was curated by information for practice. Full Article History
hot A Fleeting Utopia: The Rise and Fall of the “Women’s Hotel” in American Cities By ifp.nyu.edu Published On :: Fri, 01 Nov 2024 13:16:04 +0000 The post A Fleeting Utopia: The Rise and Fall of the “Women’s Hotel” in American Cities was curated by information for practice. Full Article History
hot Clinical, Quality of Life, and Health Care Utilization Outcomes of Switching the Administration Route of Antipsychotic Medications Among People With Schizophrenia Spectrum Disorder: A Systematic Review and Meta-Analysis By ifp.nyu.edu Published On :: Mon, 04 Nov 2024 17:34:51 +0000 Journal of the American Psychiatric Nurses Association, Ahead of Print. Background:Using long-acting injectable (LAI) antipsychotic medications can improve the outcomes of patients with schizophrenia, such as reducing symptom severity and hospitalization risk. However, the outcomes of switching from oral to LAI antipsychotic medications are unclear.Aims:The purpose of this review is to provide a summary of […] The post Clinical, Quality of Life, and Health Care Utilization Outcomes of Switching the Administration Route of Antipsychotic Medications Among People With Schizophrenia Spectrum Disorder: A Systematic Review and Meta-Analysis was curated by information for practice. Full Article Meta-analyses - Systematic Reviews
hot Brief Eclectic Psychotherapy for PTSD (BEPP) By ifp.nyu.edu Published On :: Wed, 30 Oct 2024 14:22:32 +0000 The post Brief Eclectic Psychotherapy for PTSD (BEPP) was curated by information for practice. Full Article Guidelines Plus
hot CfP: Patient preferences in psychotherapy (Deadline for expressions of interest: Oct 31) By ifp.nyu.edu Published On :: Wed, 09 Oct 2024 22:48:34 +0000 The post CfP: Patient preferences in psychotherapy (Deadline for expressions of interest: Oct 31) was curated by information for practice. Full Article Calls & Consultations
hot IUJSOM Hot Tuesdays: Jazz Combos By indianapublicmedia.org Published On :: 13 Nov 2024 01:30:00 GMT Ford-Crawford Hall, Simon Music Center Tuesday, November 12, 2024, 8:30 – 10pm More info: events.iu.edu… Full Article 2024/11/12 (Tue)
hot Secret Aardvark Drops Hot Nut News By www.portlandmercury.com Published On :: Mon, 11 Nov 2024 16:30:00 -0800 The Portland-area hot sauce company celebrated 20 years of flavorful, spicy sauciness with a new snack. by Suzette Smith Beloved local hot sauce makers Secret Aardvark celebrated 20 years of spiciness, in both seasoning and spirit, on Saturday at the Landmark Saloon, where—between sets by two of her favorite local groups, Silver Lake 66 and Ashleigh Flynn and the Riveters—Aardvark owner Stacy Moritz introduced a new product to the crowd, Aardvarks Nuts: Habanero Hazelnuts. "Who doesn't like a hot nut?" she asked the crowd, wryly. Hazelnuts are the state nut of Oregon, but as it happens, Moritz told the Mercury she didn't enjoy them until her team made them hot. And that desire—to make the filbert something she likes—is the reasoning she gave for the snack experiment to be born. To our taste buds, the Aardvarks Nuts are more flavor-forward than they are eye-watering hot, but the spice does sneak up, thanks to the folie à deux between the nut's oil and Aardvark's secret spices. It's a nice, unique mix that transforms the sweetness we'd generally expect from a hazelnut with the carrot and chili pepper profiles we love in Aardvark's original Habanero Hot Sauce. Aardvark Nuts stay true to the company's local focus, starting out as Laurel Tree hazelnuts, which are grown in the Willamette Valley. "We took the bougiest nut we could find, and made them Aardvark habanero spicy," Moritz said. "It's fun, it's hard, it's sweaty, it's hot." Much of that sentiment can also be found on the nut packaging, which stays true to Moritz's well-documented, saucy humor. In a 2013 Mercury profile Moritz mused, "My dream is one day to have a guy in an Aardvark costume running down Hollywood Boulevard with his dick hanging out." Moritz remembered the profile and said that particular dream hasn't ever been realized, but if they were to do it now, she'd have to be the one wearing the costume. Related: Secret Aardvark Could Become a National Sensation. (So Maybe You Should Stop Stealing It?) Saturday's nut drop was a celebratory sneak peak. The company is still working to make the packaged snacks available for purchase, but they will be, at the very least, on the Secret Aardvark site by the new year. A representative from the company said they were just waiting on final approval of the product's non-GMO certification. In the meanwhile, Aardvark fans can keep their eyes peeled for other upcoming sauces the company has in the works: Moritz said we could expect a serrano ranch sauce and a spicy mayo "that will actually be spicy." Full Article Food and Drink Culture
hot Officials say rapper Nipsey Hussle shot and killed at 33 By minnesota.publicradio.orghttps Published On :: Mon, 01 Apr 2019 01:44:24 -0500 Nipsey Hussle, a respected rapper who earned a Grammy nomination this year for his major-label debut, was fatally shot outside his clothing store, authorities said. Full Article
hot "Hot Stuff" tops charts 40 years ago By minnesota.publicradio.orghttps Published On :: Mon, 24 Jun 2019 10:08:44 -0500 "Hot Stuff" by Donna Summer reached No. 1 on the Billboard pop chart 40 years ago today. The disco classic features a solo by former Doobie Brothers guitarist Jeff "Skunk" Baxter. Full Article
hot Photo emerges of woman with Steve Lawson at John MacArthur's church By www.christianpost.com Published On :: Mon, 11 Nov 2024 11:22:00 -0500 An alleged photo showing Pastor Steve Lawson next to a woman believed to be his mistress has emerged online amid new scrutiny about the role of a California megachurch in the scandal. Full Article
hot Verses from a Nation in Transition: Photo Exhibit Features the People of Ukraine By www.nhpr.org Published On :: Thu, 06 Feb 2020 15:44:41 +0000 We’ve been hearing a lot about Ukraine recently. From where it is on the map to its debunked involvement in the 2016 election. Even so, photographer Joseph Sywenkyj says we’ve heard very little about the people of Ukraine. Full Article
hot Yevgeny Prigozhin: Ace of hotdog sales, Putin's cook, military leader and mutineer By english.pravda.ru Published On :: Thu, 24 Aug 2023 14:07:00 +0300 Yevgeny Prigozhin, the founder of private military company Wagner, was killed in a plane crash on August 23. His Embraer ERJ-135BJ Legacy 600 plane crashed in the Tver region. Prigozhin was 62. Prigozhin was born in 1961 in Leningrad. He lost his father in his early childhood, and was raised by his mother and stepfather. Yevgeny Prigozhin received his first criminal record when he was 18, the second and third one followed soon afterwards. After he was released from prison, Prigozhin decided to open his own business. He and his stepfather started selling hotdogs in Leningrad. Full Article Society
hot Cyprus: From a hot frying pan into another By english.pravda.ru Published On :: Wed, 02 Aug 2023 15:15:00 +0300 My Thought of the Day A Pentagon enforcement agent twice had arrived in Cyprus to make sure our government complies with all the American instructions on sanctions against Russia in support of Ukraine and also to insist on the prosecution of Greek Cypriots and Companies who continue to disobey their instructions! The Cyprus government promised to prosecute all of those found guilty. That’s a pre-condition for purchasing arms from America! The EU on the other hand behaves in a much worse manner; not only Cyprus it’s ordered to impose EU sanctions against Russians at the detriment of its own economy, but it also demands social, judicial and economic obedience on how to run the country. If that’s not bad enough, Cyprus it’s also punished with massive fines for rule breaking! Meanwhile, Turkey is busy with the Islamization of the occupied northern part of our island! Last week it turned its attention to desecrate the most sacred Christian monastery of Apostolos Andreas and has proceeded to turn part of it into a Muslim prayer mosque. This is a blatant insult to all Orthodox Greeks and an inexcusable desecration to the Hellenic Orthodox faith. The Cyprus government has decided to make an “official complaint” to the UN, knowing it would amount to nothing! And, here we are! From one frying pan straight into another! Is Cyprus a free nation or a subservient state incapable of producing a strong decisive government to run the country and develop its own policies free from foreign meddling but instead, bows subservience to the EU—and now the United States doctrine— by showing absolute submissiveness? Is there hope for a country governed by such a mentality? Andreas C ChrysafisAuthor/Artist/WriterAugust 1 2023 Full Article Opinion
hot Yars nuclear deterrent missile designed to cool Western hot heads By english.pravda.ru Published On :: Tue, 01 Oct 2024 20:14:00 +0300 Not that long ago, the Teikovo missile unit (Guards Order of Kutuzov missile division) took mobile ground-based Yars missile systems for exercises. The manoeuvres included marches at a distance of up to 100 kilometers, dispersal and change of positions, organization of combat security and camouflage. The goal of the exercises was to improve the training and coherence of personnel of the Strategic Missile Forces. Full Article World
hot Woman downs 20 shots of strong drinks and falls into coma at Moscow bar By english.pravda.ru Published On :: Tue, 29 Oct 2024 15:02:00 +0300 A young woman fell into a coma after having 20 shots in a Moscow bar. It was said that the woman went out for a drink after her boyfriend broke up with her. On Sunday night, October 27, the 24-year-old woman named only as Tanya came to the bar at Sergei Zhukov's Ruki Vverkh Bar (Hands Up!) on Tverskaya Street in Moscow. She ordered 20 shots of various strong drinks — vodka, whiskey, rum, tequila, sambuca and absinthe — and downed them all one after another while her friend and the bartender were filming her drinking. The woman felt sick and collapsed soon afterwards. She was rushed to intensive care in serious condition. Full Article Society
hot Snapchat is the new hotspot for online shopping, according to Wethrift By www.retailtechnologyreview.com Published On :: It has recently emerged that consumer habits amongst Gen Z are changing, with many now turning to social media for retail therapy. Weighing in on this growing phenomenon of social media shopping, Nick Drewe, founder of the online discount platform Wethrift, offers his insights: Full Article Internet Retailing Retail Supply Chain Critical Issues
hot Hot war between Iran and Israel postponed, but for how long? By english.pravda.ru Published On :: Mon, 15 Apr 2024 17:33:00 +0300 The conflict between Iran and Israel did not reach a heated stage this timeб but the parties tested their level of readiness for full-fledged war. Russia could benefit from the conflict in the Middle East, but not in the long term. The market reacted weakly to Iran's attack on Israel on Sunday, April 14. Gold and oil prices showed almost no reaction. The price of gold rose by 0.8 percent to $2,379 per troy ounce, according to trading data on Monday, April 15. At the same time, Brent is trading steadily at $90.4 per barrel, WTI — at $85.6. The conflict appears to have been frozen for a short time unless Israel responds to Iran within a week. The situation is expected to aggravate, but not now — the parties have tested their combat readiness, but preferred not to go full throttle yet. Full Article Incidents
hot PPDS to unveil ‘all inclusive’ suite of hospitality display solutions at EquipHotel 2024 + new global streaming partnership announcement By www.retailtechnologyreview.com Published On :: PPDS is participating at EquipHotel 2024 (3-7 November), with the latest innovations in its portfolio of hospitality display solutions, plus the launch of a brand new ‘all inclusive’ streaming partnership for Philips MediaSuite TVs. Full Article Digital Signage Exhibitions and Events
hot KMA: Summer of 2024 Was S. Korea's Hottest Ever By world.kbs.co.kr Published On :: Thu, 05 Sep 2024 15:25:18 +0900 [Science] : This summer the country notched its highest temperatures to date. According to the Korea Meteorological Administration(KMA) on Thursday, the seasonal average temperature nationwide was 25-point-six degrees Celsius, one-point-nine degrees higher than the past yearly average for the season, and the highest ...[more...] Full Article Science
hot Unusually Hot September to Ease This Weekend By world.kbs.co.kr Published On :: Wed, 18 Sep 2024 14:00:32 +0900 [Science] : Korea is experiencing an unusually hot September, with thermometers reaching up to 38 degrees Celsius in Gokseong, South Jeolla Province, and Jinju, South Gyeongsang Province, on Tuesday. Temperatures in most regions in the south and inland areas of the Chungcheong provinces, including Gwangju; Namwon, ...[more...] Full Article Science
hot Tropical Nights, Heat Waves Mark Hottest September on Record By world.kbs.co.kr Published On :: Tue, 08 Oct 2024 14:27:11 +0900 [Science] : This past September set records both for tropical nights and unusually hot daytime weather throughout the country. According to the Korea Meteorological Administration(KMA) on Tuesday, locations across the nation experienced heat-wave-level temperatures of 33 degrees Celsius or higher over an average ...[more...] Full Article Science
hot Motel vs. Hotel: Differences in Overnight Accommodations By money.howstuffworks.com Published On :: Tue, 02 Apr 2024 16:37:12 -0400 Differentiating between most overnight accommodations can be simple, based on the building's location, layout, amenities and price, but several outliers blur the lines between these key differences. Full Article
hot The Hottest Pepper in the World Is Another Puckerbutt Creation By recipes.howstuffworks.com Published On :: Tue, 30 Jul 2024 10:10:02 -0400 Hot peppers are tasty and nutritious fruits (not vegetables!) that create a spicy sensation on your tastebuds. They have been a staple of spicy foods for thousands of years, but in the last half-century, scientists have developed advanced cross-breeding techniques to craft the hottest pepper in the world — hotter than nature would concoct on its own. Full Article
hot The Hottest Hot Sauce in the World and 16 Runners-up By recipes.howstuffworks.com Published On :: Mon, 05 Aug 2024 12:24:37 -0400 In search of the hottest hot sauce in the world, we found the bottles with the highest Scoville Heat Units (SHUs) to bring you this list of the 14 most diabolically spicy hot sauces. Full Article
hot When Fans Ask for a Photo and You're Not Wearing Makeup By world.kbs.co.kr Published On :: 2024-10-28 +09:00 Spook is in the air! [more...] Full Article Economy&It
hot Forty years and counting: new topsoil data provides most extensive snapshot of environmental pollution effects - British Geological Survey By news.google.com Published On :: Tue, 01 Oct 2024 07:00:00 GMT Forty years and counting: new topsoil data provides most extensive snapshot of environmental pollution effects British Geological Survey Full Article
hot Exploiting fourth-generation synchrotron radiation for enzyme and photoreceptor characterization By journals.iucr.org Published On :: (Time-resolved) macromolecular crystallography at the new ESRF-ID29 beamline is described. Full Article text
hot Morphological control for hollow rod crystals of a photochromic diarylethene on spherulites by surface properties of substrates By journals.iucr.org Published On :: 1,2-Bis(3,5-dimethyl-2-thienyl)perfluorocyclopentene formed its own spherulites by sublimation onto the hydrophilic surfaces of the (0001) planes of α-quartz and sapphire substrates. The formation of different morphologies of these spherulites was attributed to the surface properties of each substrate. Depending on the morphology of the spherulites, hollow rod crystals with cross sections of different sizes and shapes and branching structures were generated on the surfaces of the spherulites. Full Article text
hot Morphological control for hollow rod crystals of a photochromic diarylethene on spherulites by surface properties of substrates By journals.iucr.org Published On :: 2024-10-31 Sublimation methods utilizing the surface properties of substrates can address the challenge of controlling hollow morphologies in rod crystals. Spherulites were formed on the hydrophilic surface of the (0001) planes of α-quartz and sapphire substrates by sublimation of 1,2-bis(3,5-dimethyl-2-thienyl)perfluorocyclopentene (1a). Various types of hollow morphologies, distinguished by the size and shape of their cross sections and by the presence or absence of branching structures, were formed separately on α-quartz and sapphire substrates. Such precise control of the hollow morphologies was attributed to the wettability of each substrate, leading to the formation of spherulites of 1a. In addition, it was indicated that the formation process of the surface morphologies of spherulites was associated with the hollow morphologies of rod crystals of 1a. Full Article text
hot Expression, purification and crystallization of the photosensory module of phytochrome B (phyB) from Sorghum bicolor By journals.iucr.org Published On :: 2024-02-20 Sorghum, a short-day tropical plant, has been adapted for temperate grain production, in particular through the selection of variants at the MATURITY loci (Ma1–Ma6) that reduce photoperiod sensitivity. Ma3 encodes phytochrome B (phyB), a red/far-red photochromic biliprotein photoreceptor. The multi-domain gene product, comprising 1178 amino acids, autocatalytically binds the phytochromobilin chromophore to form the photoactive holophytochrome (Sb.phyB). This study describes the development of an efficient heterologous overproduction system which allows the production of large quantities of various holoprotein constructs, along with purification and crystallization procedures. Crystals of the Pr (red-light-absorbing) forms of NPGP, PGP and PG (residues 1–655, 114–655 and 114–458, respectively), each C-terminally tagged with His6, were successfully produced. While NPGP crystals did not diffract, those of PGP and PG diffracted to 6 and 2.1 Å resolution, respectively. Moving the tag to the N-terminus and replacing phytochromobilin with phycocyanobilin as the ligand produced PG crystals that diffracted to 1.8 Å resolution. These results demonstrate that the diffraction quality of challenging protein crystals can be improved by removing flexible regions, shifting fusion tags and altering small-molecule ligands. Full Article text
hot Performance of a photoelectron momentum microscope in direct- and momentum-space imaging with ultraviolet photon sources By journals.iucr.org Published On :: 2024-01-01 The Photoelectron-Related Image and Nano-Spectroscopy (PRINS) endstation located at the Taiwan Photon Source beamline 27A2 houses a photoelectron momentum microscope capable of performing direct-space imaging, momentum-space imaging and photoemission spectroscopy with position sensitivity. Here, the performance of this microscope is demonstrated using two in-house photon sources – an Hg lamp and He(I) radiation – on a standard checkerboard-patterned specimen and an Au(111) single crystal, respectively. By analyzing the intensity profile of the edge of the Au patterns, the Rashba-splitting of the Au(111) Shockley surface state at 300 K, and the photoelectron intensity across the Fermi edge at 80 K, the spatial, momentum and energy resolution were estimated to be 50 nm, 0.0172 Å−1 and 26 meV, respectively. Additionally, it is shown that the band structures acquired in either constant energy contour mode or momentum-resolved photoemission spectroscopy mode were in close agreement. Full Article text
hot Quantifying bunch-mode influence on photon-counting detectors at SPring-8 By journals.iucr.org Published On :: 2024-02-16 Count-loss characteristics of photon-counting 2D detectors are demonstrated for eight bunch-modes at SPring-8 through Monte Carlo simulations. As an indicator, the effective maximum count rate was introduced to signify the X-ray intensity that the detector can count with a linearity of 1% or better after applying a count-loss correction in each bunch-mode. The effective maximum count rate is revealed to vary depending on the bunch-mode and the intrinsic dead time of the detectors, ranging from 0.012 to 0.916 Mcps (megacounts per second) for a 120 ns dead time, 0.009 to 0.807 Mcps for a 0.5 µs dead time and 0.020 to 0.273 Mcps for a 3 µs intrinsic detector dead time. Even with equal-interval bunch-modes at SPring-8, the effective maximum count rate does not exceed 1 Mcps pixel−1. In other words, to obtain data with a linearity better than 1%, the maximum intensity of X-rays entering the detector should be reduced to 1 Mcps pixel−1 or less, and, in some cases, even lower, depending on the bunch-mode. When applying count-loss correction using optimized dead times tailored to each bunch-mode, the effective maximum count rate exceeds the values above. However, differences in the effective maximum count rate due to bunch-modes persist. Users of photon-counting 2D detectors are encouraged to familiarize themselves with the count-loss characteristics dependent on bunch-mode, and to conduct experiments accordingly. In addition, when designing the time structure of bunch-modes at synchrotron radiation facilities, it is essential to take into account the impact on experiments using photon-counting 2D detectors. Full Article text
hot High-pressure X-ray photon correlation spectroscopy at fourth-generation synchrotron sources By journals.iucr.org Published On :: 2024-04-10 A new experimental setup combining X-ray photon correlation spectroscopy (XPCS) in the hard X-ray regime and a high-pressure sample environment has been developed to monitor the pressure dependence of the internal motion of complex systems down to the atomic scale in the multi-gigapascal range, from room temperature to 600 K. The high flux of coherent high-energy X-rays at fourth-generation synchrotron sources solves the problems caused by the absorption of diamond anvil cells used to generate high pressure, enabling the measurement of the intermediate scattering function over six orders of magnitude in time, from 10−3 s to 103 s. The constraints posed by the high-pressure generation such as the preservation of X-ray coherence, as well as the sample, pressure and temperature stability, are discussed, and the feasibility of high-pressure XPCS is demonstrated through results obtained on metallic glasses. Full Article text
hot Development of dual-beamline photoelectron momentum microscopy for valence orbital analysis By journals.iucr.org Published On :: 2024-04-15 The soft X-ray photoelectron momentum microscopy (PMM) experimental station at the UVSOR Synchrotron Facility has been recently upgraded by additionally guiding vacuum ultraviolet (VUV) light in a normal-incidence configuration. PMM offers a very powerful tool for comprehensive electronic structure analyses in real and momentum spaces. In this work, a VUV beam with variable polarization in the normal-incidence geometry was obtained at the same sample position as the soft X-ray beam from BL6U by branching the VUV beamline BL7U. The valence electronic structure of the Au(111) surface was measured using horizontal and vertical linearly polarized (s-polarized) light excitations from BL7U in addition to horizontal linearly polarized (p-polarized) light excitations from BL6U. Such highly symmetric photoemission geometry with normal incidence offers direct access to atomic orbital information via photon polarization-dependent transition-matrix-element analysis. Full Article text
hot A new experimental setup for combined fast differential scanning calorimetry and X-ray photon correlation spectroscopy By journals.iucr.org Published On :: 2024-04-24 Synchrotron-radiation-based techniques are a powerful tool for the investigation of materials. In particular, the availability of highly brilliant sources has opened the possibility to develop techniques sensitive to dynamics at the atomic scale such as X-ray photon correlation spectroscopy (XPCS). XPCS is particularly relevant in the study of glasses, which have been often investigated at the macroscopic scale by, for example, differential scanning calorimetry. Here, we show how to adapt a Flash calorimeter to combine XPCS and calorimetric scans. This setup paves the way to novel experiments requiring dynamical and thermodynamic information, ranging from the study of the crystallization kinetics to the study of the glass transition in systems that can be vitrified thanks to the high cooling rates reachable with an ultrafast calorimeter. Full Article text
hot Operando double-edge high-resolution X-ray absorption spectroscopy study of BiVO4 photoanodes By journals.iucr.org Published On :: 2024-04-15 High energy resolution fluorescence detected X-ray absorption spectroscopy is a powerful method for probing the electronic structure of functional materials. The X-ray penetration depth and photon-in/photon-out nature of the method allow operando experiments to be performed, in particular in electrochemical cells. Here, operando high-resolution X-ray absorption measurements of a BiVO4 photoanode are reported, simultaneously probing the local electronic states of both cations. Small but significant variations of the spectral lineshapes induced by the applied potential were observed and an explanation in terms of the occupation of electronic states at or near the band edges is proposed. Full Article text
hot The effect of transport apertures on relay-imaged, sharp-edged laser profiles in photoinjectors and the impact on electron beam properties By journals.iucr.org Published On :: 2024-06-06 In a photoinjector electron source, the initial transverse electron bunch properties are determined by the spatial properties of the laser beam on the photocathode. Spatial shaping of the laser is commonly achieved by relay imaging an illuminated circular mask onto the photocathode. However, the Gibbs phenomenon shows that recreating the sharp edge and discontinuity of the cut profile at the mask on the cathode is not possible with an optical relay of finite aperture. Furthermore, the practical injection of the laser into the photoinjector results in the beam passing through small or asymmetrically positioned apertures. This work uses wavefront propagation to show how the transport apertures cause ripple structures to appear in the transverse laser profile even when effectively the full laser power is transmitted. The impact of these structures on the propagated electron bunch has also been studied with electron bunches of high and low charge density. With high charge density, the ripples in the initial charge distribution rapidly wash-out through space charge effects. However, for bunches with low charge density, the ripples can persist through the bunch transport. Although statistical properties of the electron bunch in the cases studied are not greatly affected, there is the potential for the distorted electron bunch to negatively impact machine performance. Therefore, these effects should be considered in the design phase of accelerators using photoinjectors. Full Article text
hot In situ photodeposition of ultra-small palladium particles on TiO2 By journals.iucr.org Published On :: 2024-07-15 In situ and operando investigation of photocatalysts plays a fundamental role in understanding the processes of active phase formation and the mechanisms of catalytic reactions, which is crucial for the rational design of more efficient materials. Using a custom-made operando photocatalytic cell, an in situ procedure to follow the formation steps of Pd/TiO2 photocatalyst by synchrotron-based X-ray absorption spectroscopy (XAS) is proposed. The procedure resulted in the formation of ∼1 nm Pd particles with a much narrower size distribution and homogeneous spreading over TiO2 support compared with the samples generated in a conventional batch reactor. The combination of in situ XAS spectroscopy with high-angle annular dark-field scanning transmission electron microscopy demonstrated the formation of single-atom Pd(0) sites on TiO2 as the initial step of the photodeposition process. Palladium hydride particles were observed for all investigated samples upon exposure to formic acid solutions. Full Article text