abs Abstentionniste, dois tu fermer ta gueule ? By marc-vasseur.over-blog.com Published On :: Thu, 22 Jun 2017 18:15:00 +0200 Non, Fred, t’es pas tout seul… toi et tes copains abstentionnistes, vous êtes 27.125.535… soit 57,36% des français en âge de voter pour les législatives. Une paille quoi. Ce chiffre affolant permet à certains de dire que, les nouveaux députés ne sont... Full Article
abs Student's classroom behaviour recognition method based on abstract hidden Markov model By www.inderscience.com Published On :: 2024-07-04T23:20:50-05:00 In order to improve the standardisation of mutual information index, accuracy rate and recall rate of student classroom behaviour recognition method, this paper proposes a student's classroom behaviour recognition method based on abstract hidden Markov model (HMM). After cleaning the students' classroom behaviour data, improve the data quality through interpolation and standardisation, and then divide the types of students' classroom behaviour. Then, in support vector machine, abstract HMM is used to calculate the output probability density of support vector machine. Finally, according to the characteristic interval of classroom behaviour, we can judge the category of behaviour characteristics. The experiment shows that normalised mutual information (NMI) index of this method is closer to one, and the maximum AUC-PR index can reach 0.82, which shows that this method can identify students' classroom behaviour more effectively and reliably. Full Article
abs Valuing IS/IT Resources as an Antecedent of Absorptive Capacity: An RBV Perspective By Published On :: Full Article
abs The Absorption Experience of Gen Y Beginning Teachers in Elementary Schools, From the Point of View of the Beginning Teachers and Their Mentors By Published On :: 2024-07-08 Aim/Purpose . The present study aimed to understand in depth the experience of identity formation of beginning teachers (BTs), members of Gen Y, in their first year at elementary school, teaching students of Gen Alpha, from the perspective of BTs and their teacher mentors (TMs). Background. The purpose of the study was to compare the aspects described by BTs and their mentor teachers of the initial experience of teaching and of shaping the professional identity of BTs, members of Gen Y, in elementary schools, from the perspective of BTs and teacher mentors (TMs). Methodology. This was a qualitative study. Two groups participated in the study: (a) 75 BTs, members of Gen Y, and (b) 40 mentors of beginning teachers. Contribution. The findings of this study indicate that the creation of an emotionally and professionally supportive community led to a fruitful discussion on issues related to the process of absorption and integration of BTs in the school. This process advanced their professional development, expanding knowledge, abilities, strategies, and innovative pedagogical practices for classroom management, and meaningful teaching and learning in the classroom. The supportive community provided an emotional, professional, social-organizational, and evaluative-reflective response to the needs of BTs, facilitating meaningful interactions between the BTs and their students. It created for students a space for emotional training, organizing and managing behavior, regulating emotions and behavior, reducing feelings of anger, and arousing a feeling of optimism. Findings. The findings show that there was a conflict between the BTs’ and TMs’ perceptions of school reality. The mentors expected the BTs to adapt to the existing system, whereas the BTs perceived the process as one of formation of their identity as teachers. It turned out that parameters that were important to Gen Y teachers, such as knowing the school organization and being an influential factor that brings about change, were less important to their mentors. The findings of the present study reinforce those of previous studies that investigated the employment characteristics of Gen Y. Recommendations for Practitioners. A supportive community at school is likely to increase the level of mental well-being of Gen Y teachers. To this end, support communities of teachers by form and by discipline of study should be created. In the community, emphasis should be placed on reflection and mental resilience in all situations and challenging events that happen to the BTs to help them cope with the accumulated stress. Recommendations for Researchers. Students need a sensitive environment that is appropriate for Gen Alpha children. This environment must allow for emotional training and regulation, behavior organization and management to arouse a feeling of optimism and reduce anger. To develop students’ emotional, social, and cognitive abilities, teachers must teach with love, sensitivity, affectivity, and empathy. Impact on Society. To retain BTs and prevent them from quitting their career, schools must ensure that members of Gen Y understand the school organization and are satisfied with the way the organization is managed. They must have a sense of being significant partners in the life of the school. Under optimal working conditions, Gen Y teachers may greatly contribute to the values of education and equal opportunity, maximizing the personal potential of each student and the classroom as a whole, and making the school relevant. Future Research. Future studies should examine the characteristics of students belonging to Gen Alpha. One of the difficulties mentioned by BTs was a misunderstanding of the characteristics of Gen Alpha, which created problems in the interactions within the teaching staff and between the teachers and the students, and pre-vented gaining authority with other teachers and with students. Full Article
abs Information Quality and Absorptive Capacity in Service and Product Innovation Processes By Published On :: Full Article
abs The Effects of Knowledge Sharing and Absorption on Organizational Innovation Performance – A Dynamic Capabilities Perspective By Published On :: Full Article
abs A Model for Mandatory Use of Software Technologies: An Integrative Approach by Applying Multiple Levels of Abstraction of Informing Science By Published On :: Full Article
abs McAfee Labs Stinger 12.1.0.3218 Antivirus for PC Windows By filehippo.com Published On :: Fri, 28 Jun 2019 09:01:07 GMT Stinger is a quick and installation-free standalone tool for detecting and removing prevalent malware and threats, ideal if your PC is already infected. While not a replacement for full fledged antivirus software, Stinger is updated multiple times a ... Full Article
abs Judge In Absolute Bullshit Copyright Case Against Mariah Carey Signals She’s Leaning Carey’s Way By www.techdirt.com Published On :: Wed, 13 Nov 2024 03:54:58 +0000 As the saying goes, the arc of morale judgment is long, but it does bend towards justice. And even if we accept such an optimistic worldview is relevant in this year of our lord, 2024, that certainly doesn’t mean we can’t bitch about how long that damned arc is. It’s been over two years since […] Full Article 1 all i want for christmas is you andy stone christmas songs copyright mariah carey vince vance
abs Eugene Vindman grabs victory for Democrats in Virginia House race By www.washingtontimes.com Published On :: Wed, 06 Nov 2024 18:51:21 -0500 Democratic House candidate Eugene Vindman was victorious Wednesday over his Republican opponent for Virginia's 7th District. Full Article
abs Special issue of Biodiversity: Call for abstracts By www.eubon.eu Published On :: Thu, 27 Nov 2014 11:33:00 +0200 Connecting the dots: Integrating Biodiversity Observations to Better Track the CBD 2020 Targets. Biodiversity: Journal of Life on Earth invites authors to share their experiences using systematic observations - including remote sensing observations - for monitoring change in biodiversity. The journal envisions submissions focusing on models for blending in-situ and remotely sensed data to fill gaps in the understanding of biodiversity status and trends.Biodiversity would welcome papers from members of the Biodiversity Indicators Partnership, working in the wider landscape of data and observation, and from contributors to the Group on Earth Observations Biodiversity Observation Network (GEO BON) exploring how Essential Biodiversity Variables could provide a framework for integrating biodiversity data. The journal also welcomes papers related to support offered by the Global Biodiversity Information Facility for implementing the Aichi Targets. This special double issue will be published in September 2015, the midpoint of the 2020 mandate of the CBD, and following the release of the 4th edition of the Global Biodiversity Outlook at the October 2014 12th meeting of the CBD’s Conference of the Parties (COP-12) in Pyeongchang, Republic of Korea. Prospective authors may wish to refer to UNEP/CBD/SBSTTA/17/2, Facilitating the Implementation of the Strategic Plan for Biodiversity 2011-2020 and the Aichi Biodiversity Targets through Scientific and Technical Means, prepared for the Seventeenth meeting of the CBD’s Subsidiary Body on Scientific, Technical and Technological Advice (SBSTTA-17); the SBSTTA-17 report (http://www.cbd.int/doc/?meeting=SBSTTA-17); and meeting documents for the Expert Workshop on Enhancing Biodiversity Data and Observing Systems in Support of the Implementation of the Strategic Plan for Biodiversity 2011–2020 (http://www.cbd.int/doc/?meeting=WS-BDOBS). Please submit abstracts (250 words or less) in Times New Roman 12 pt. by 27 November 2014 to the Managing Editor, Vanessa Reid. A special board of editors will review the submitted abstracts. Only approved abstracts will be asked to proceed to final draft (4000-5000 words plus references and figures). Publication will be subject to peer review via Scholar One manuscripts online. Full Article News
abs ESA Living Planet Symposium 2016: Abstract Submission is Open By www.eubon.eu Published On :: Thu, 24 Sep 2015 16:55:00 +0300 The 2016 European Space Agency Living Planet Symposiumwill be held in Prague, Czech Republic from 9-13 May 2016 and is organised with the support of the Ministry of Transport, Ministry of Environment and Ministry of Education, Youth and Sports of the Czech Republic. The event follows previous successful symposia held in Edinburgh (2013), Bergen (2010), Montreux (2007) and Salzburg (2004). The first announcement has been now released, with a deadline for abstract submission on 16 October 2015. All received abstracts will be reviewed by a Scientific Committee, notification of acceptance will be provided in early February 2016. Registration to attend the event (free of charge) will be opened in February 2016, after the publication of the preliminary programme. The objectives of the ESA Living Planet Symposium are to: Present the progress and plans for the implementation of ESA Earth Observation strategy and the relevance of ESA's EO Programme to societal challenges, science and economy. Provide an international forum to scientists, researchers and users to present and share state of the art results based on ESA's Earth Observation and third-party mission data. Review the development of Earth Observation applications. Present the Copernicus space component and operational services. Report on ESA’s Exploitation Programmes (i.e. Climate Change Initiative, SEOM, DUE, VAE, STSE). Introduce the current and future planned Earth Observation missions. Outline ESA’s international cooperation in the field of Earth Observation. Provide dedicated thematic tutorials and demonstrations. For more information, please visit: http://lps16.esa.int Full Article News
abs 1st GLOBAQUA International Conference: Deadline for abstracts extended By www.eubon.eu Published On :: Sat, 31 Oct 2015 10:28:00 +0200 The 1st GLOBAQUA International Conference will be held on 11-12 January 2016 in Freising, Germany. The interdisciplinary conference will go under the motto "Managing The Effects Of Multiple Stressors On Aquatic Ecosystems Under Water Scarcity". The conference will serve as a platform for exchange and discussion of innovative scientific findings and methods in aquatic ecosystems research. It will focus on novel methods of environmental monitoring and modeling of various scopes, scales and structural complexity to improve process understanding the interconnectivity and feedback mechanisms of climate (regional), land use (regional), economy, hydrology and hydraulics (catchment and river), water quality (river), biology and aquatic ecosystems (reach scale). Further, the conference builds the bridge to the scientific assessment of implications on policy and management. The deadine for submitting an abstract for the conference has been now extended until 7 Nov 2015. More information on the conference, registration, abstract submitting is available on the GLOBAQUA website. Full Article News
abs New EU ABS Regulation Workshops - Stockholm, Warsaw, Leiden, Budapest By www.eubon.eu Published On :: Sat, 10 Sep 2016 15:13:00 +0300 The EU is a party to the Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilisation. The EU ABS Regulation1, which transposes into the EU legal order the compliance pillar of the Protocol, became applicable as of 12 October 2014. The principal obligations of the Regulation – i.e. Article 4 on due diligence, Article 7 on monitoring user compliance and Article 9 on checks on user compliance – will become applicable as of 12 October 2015. In this context it is important that those who utilise genetic resources (i.e. conduct research and development on the genetic and/or biological composition of genetic resources, including through the application of biotechnology) are aware of the obligations arising from the Regulation, and that they can take the necessary measures to ensure their activities are compliant. What's in it for you? The EU ABS Regulation workshop aims at providing the participants with knowledge about their obligations under the EU ABS Regulation and what they practically imply for their everyday work. In the first part of the workshop, the new legal framework will be explained, providing insight into the main provisions of the EU ABS Regulation. In the second part of the workshop, participants will have a chance to put the knowledge gained into practice through interactive case studies, based on real-life examples and realistic scenarios. The workshop should allow participants to better understand their obligations under the EU law, and to establish which steps they need to follow and which practical measures they should take when dealing with genetic resources originating from Parties to the Nagoya Protocol. Planning and location of the workshops: Feel free to apply for registration to one of the following workshops: 18 October: Stockholm 17 November: Warsaw 21 November: Leiden Date to be determined: Budapest The workshop is targeted at senior academics and experienced researchers conducting research and development on genetic resources who have an interest in gaining an essential understanding of the new legal framework in the EU, in view of the ABS Regulation becoming fully operational later this year. Registration page: http://www.euconf.eu/abs/en/registration/index.html Full Article News
abs EU ABS Regulation Workshop - Stockholm By www.eubon.eu Published On :: Sat, 10 Sep 2016 15:31:00 +0300 The EU ABS Regulation workshop aims at providing the participants with knowledge about their obligations under the EU ABS Regulation and what they practically imply for their everyday work. In the first part of the workshop, the new legal framework will be explained, providing insight into the main provisions of the EU ABS Regulation. In the second part of the workshop, participants will have a chance to put the knowledge gained into practice through interactive case studies, based on real-life examples and realistic scenarios. Registration page: http://www.euconf.eu/abs/en/registration/index.html Full Article Events
abs ABS Regulation Training Workshop - Warsaw By www.eubon.eu Published On :: Sat, 10 Sep 2016 15:41:00 +0300 The EU ABS Regulation workshop aims at providing the participants with knowledge about their obligations under the EU ABS Regulation and what they practically imply for their everyday work. In the first part of the workshop, the new legal framework will be explained, providing insight into the main provisions of the EU ABS Regulation. In the second part of the workshop, participants will have a chance to put the knowledge gained into practice through interactive case studies, based on real-life examples and realistic scenarios. Registration page: http://www.euconf.eu/abs/en/registration/index.html Full Article Events
abs EU ABS Regulation Workshop - Leiden By www.eubon.eu Published On :: Sat, 10 Sep 2016 15:46:00 +0300 The EU ABS Regulation workshop aims at providing the participants with knowledge about their obligations under the EU ABS Regulation and what they practically imply for their everyday work. In the first part of the workshop, the new legal framework will be explained, providing insight into the main provisions of the EU ABS Regulation. In the second part of the workshop, participants will have a chance to put the knowledge gained into practice through interactive case studies, based on real-life examples and realistic scenarios. Registration page: http://www.euconf.eu/abs/en/registration/index.html Full Article Events
abs Manager support helps reduce absenteeism among depressed workers: study By www.safetyandhealthmagazine.com Published On :: Wed, 05 Sep 2018 00:00:00 -0400 London — Workers who experience depression may be less prone to miss work when managers show greater sensitivity to their mental health and well-being, recent research from the London School of Economics and Political Science shows. Full Article
abs Absorbent-lined single-use gloves By www.safetyandhealthmagazine.com Published On :: Sun, 26 Feb 2017 00:00:00 -0500 Megaman Absorbent-Lined Single-Use Gloves have an absorbent inner layer that controls perspiration, promotes skin health and features a durable multilayer construction for increased barrier protection. Full Article
abs Spill containment/absorbents By www.safetyandhealthmagazine.com Published On :: Mon, 27 Apr 2015 00:00:00 -0400 Does the color of an absorbent tell you anything about what it will safely absorb? Full Article
abs Granular absorbents By www.safetyandhealthmagazine.com Published On :: Sun, 23 Apr 2017 00:00:00 -0400 What does the updated OSHA silica regulation mean for spill control? Full Article
abs Absorbent floor mats By www.safetyandhealthmagazine.com Published On :: Sun, 27 May 2018 00:00:00 -0400 TaskBrand SureGrip Absorbent Adhesive Floor Mats offer superior absorption and an impermeable adhesive backing. Full Article
abs ASSA ABLOY’s Shielded Openings Absorb Radio & Magnetic Waves By www.sdmmag.com Published On :: Tue, 24 Sep 2024 12:00:00 -0400 Electromagnetic and radio frequency interference (EMI-RFI) can disrupt the performance of sensitive communications systems and devices, potentially compromising confidential data. Full Article
abs Head protection: ‘An absolute must’ By www.safetyandhealthmagazine.com Published On :: Sun, 27 Nov 2022 00:05:00 -0500 Experts share tips and trends to help safety pros keep workers safe. Full Article
abs Chemical Safety Board reminds schools of hazards in chemistry labs By www.safetyandhealthmagazine.com Published On :: Fri, 18 Nov 2022 00:00:00 -0500 Washington — In response to a recent fire in a high school chemistry laboratory that resulted in multiple injuries, the Chemical Safety Board is calling on schools and educators to review agency guidance for lab and classroom work involving flammable liquids. Full Article
abs Kh?rijite Ab? Mu?ammad Al-Maqdis?: Absolution in Takf?r on the Issue of Obedience to Scholars and Rulers By www.salaf.com Published On :: Thu, 06 Oct 2016 14:52:17 GMT Full Article
abs Absolute Systems Strengthens Kansas City Foothold With Eclipse Integration Buy By www.sdmmag.com Published On :: Tue, 05 Nov 2024 09:02:43 -0500 Absolute Systems of Kansas City has acquired Eclipse Integration, expanding its commercial security solutions and presence in the metropolitan market. Full Article
abs Absorbent wipes By www.safetyandhealthmagazine.com Published On :: Sun, 23 Jun 2024 00:00:00 -0400 The multipurpose T500 wiper is part of the Toolbox WaterWeave line. This light-duty wipe is solvent resistant; contaminant free; and combines strength, durability and absorbency. Full Article
abs Wheeled trash bins lower sanitation workers’ MSD-related absences: study By www.safetyandhealthmagazine.com Published On :: Mon, 30 Sep 2019 00:00:00 -0400 London — Use of wheeled waste collection bins – instead of bags, boxes or baskets – may reduce musculoskeletal injuries and lost worktime among sanitation workers, according to a recent study out of the United Kingdom. Full Article
abs Sellars Absorbent Materials By www.safetyandhealthmagazine.com Published On :: Sun, 24 Mar 2024 00:00:00 -0400 Sellars Absorbent Materials has been recognized as a 2024 Top Impact Company by Real Leaders, an organization dedicated to inspiring the future of business. Full Article
abs Sellars Absorbent Materials By www.safetyandhealthmagazine.com Published On :: Sun, 22 Sep 2024 00:00:00 -0400 October is Manufacturing Month. To celebrate, Milwaukee-based manufacturer Sellars Absorbent Materials will conduct an “I Spy” game. Full Article
abs ‘Micro-exercise’ during work hours may help prevent long-term sickness absences By www.safetyandhealthmagazine.com Published On :: Sat, 26 Feb 2022 00:00:00 -0500 Copenhagen, Denmark — Performing “simple and brief strengthening exercises designed to strengthen the primary muscles used during work” – known as micro-exercise – while on the job may help prevent long-term sickness absences, according to a recent study out of Denmark. Full Article
abs Study of worker absenteeism points to need for employer support of drug treatment programs, researchers say By www.safetyandhealthmagazine.com Published On :: Mon, 05 Dec 2022 00:00:00 -0500 Boston — Employees who use illicit substances have increased absenteeism – a “compelling argument” for employers to promote employee treatment programs, results of a recent Boston University study show. Full Article
abs As date for DOT rule on oral fluid drug testing nears, will labs be certified? By www.safetyandhealthmagazine.com Published On :: Tue, 12 Nov 2024 00:00:00 -0500 Washington — Although oral fluid drug testing is a federally approved alternative for truck drivers and other transportation workers in safety-sensitive positions, a key hurdle stands in the way. Full Article
abs R&D Abstracts: Showcasing Breading, Batter Ingredients By www.preparedfoods.com Published On :: Fri, 22 Nov 2019 00:00:00 -0500 Discover new breading and batter ingredients for food formulations. Full Article
abs Oil-absorbent pad By www.safetyandhealthmagazine.com Published On :: Sun, 23 Oct 2016 00:00:00 -0400 Oil Eater’s new Tuff Rug is an absorbent pad for use in high-traffic areas. Tough enough for use in maintenance departments, forklift aisles, manufacturing plants and warehouse walkways, Tuff Rug pads soak up oil, grime and dirt. Full Article
abs Maximum Marmi Porcelain Slabs Make U.S. Debut By www.floortrendsmag.com Published On :: Wed, 23 Mar 2022 00:00:00 -0400 Debuting for the first time in the U.S., these new high tech architectural surfaces include the latest in Iris Ceramica Group’s advanced technology and manufacturing capabilities and years of continuous research. Full Article
abs Kano Labs Introduces Kroil Clear Penetrating Oil By www.foodengineeringmag.com Published On :: Tue, 17 Sep 2024 09:18:00 -0400 This new odorless and non-staining food grade penetrating oil features the performance of Kroil’s original formula, with the added benefit of meeting NSF-H1 and Kosher food-safe standards. Full Article
abs How Low-Temperature Absorption Chillers Can Optimize Food and Beverage Processing By www.foodengineeringmag.com Published On :: Mon, 05 Feb 2024 00:00:00 -0500 As food and beverage manufacturers seek solutions to reduce operational costs and decarbonize, they may be surprised to find the answer in a solution that’s nearly a century old: absorption cooling. Full Article
abs Fort Partners nabs $111M construction loan for oceanfront Surfside condos By therealdeal.com Published On :: Tue, 12 Nov 2024 21:30:00 +0000 Fort Partners is forging ahead with plans for another oceanfront condo development in Surfside. The Fort Lauderdale-based firm, led by Nadim Ashi, secured a $110.7 million construction loan for Surf House, an 11-story, 17-unit building planned for 8995 Collins Avenue, property records show. Athene Annuity & Life Company, managed by its investment adviser Apollo Global […] The post Fort Partners nabs $111M construction loan for oceanfront Surfside condos appeared first on The Real Deal. Full Article Condo Market Condos Construction Loans Financing Fort Partners Miami-Dade County Surfside
abs Evidence & Policy | CfP – Exploring the Role of Youth-led Research in Policy Change (Interested authors should send a 300-word abstract by 30 Nov) By ifp.nyu.edu Published On :: Sun, 13 Oct 2024 22:33:39 +0000 The post Evidence & Policy | CfP – Exploring the Role of Youth-led Research in Policy Change (Interested authors should send a 300-word abstract by 30 Nov) was curated by information for practice. Full Article Calls & Consultations
abs Youth activism in schools: transforming education for social change (Abstract due by 30 Nov) By ifp.nyu.edu Published On :: Wed, 16 Oct 2024 23:03:59 +0000 The post Youth activism in schools: transforming education for social change (Abstract due by 30 Nov) was curated by information for practice. Full Article Calls & Consultations
abs Moscow: Trump's peace plan for Ukraine is very abstract By english.pravda.ru Published On :: Thu, 07 Nov 2024 15:47:00 +0300 Kremlin spokesman Dmitry Peskov commented on The Wall Street Journal (WSJ) article, which said that the Donald Trump team was discussing a new plan to end the conflict in Ukraine. According to Peskov, the WSJ article about Trump's peace plan was abstract. Peskov believes that the article is more like the WSJ plan. "Everything is impersonal there," he said. Full Article World
abs Endor Labs releases report on Open Source Software Dependency Management By www.retailtechnologyreview.com Published On :: Mon, 13 Nov 3600 17:26:56 +0000 Endor Labs, the open source software security solutions provider, has released The 2024 Dependency Management Report, which consolidates extensive original and third-party research into the current state of security in the software dependency lifecycle that represents the foundation for all application development. Full Article Surveillance and Security Critical Issues
abs Study: Student Absenteeism Crisis May Be Hurting Teacher Job Satisfaction By www.newswise.com Published On :: Tue, 12 Nov 2024 09:30:00 EST As student absenteeism reaches record highs in schools across the United States, new research finds that student absences are linked to lower teacher job satisfaction, raising concerns that this may exacerbate growing teacher shortages. Full Article
abs Medical Students to be Allowed to Take Leave of Absence for Personal Reasons By world.kbs.co.kr Published On :: Tue, 29 Oct 2024 17:40:17 +0900 [Domestic] : Medical students will be allowed to take a leave of absence as long as the request is for personal reasons. The education ministry revealed the decision on Tuesday after holding a closed-door meeting with the presidents of 40 universities that have medical schools. Previously, medical students were ...[more...] Full Article Domestic
abs Han Kang ‘Surprised,’ ‘Absolutely Honored’ to Win Nobel Prize By world.kbs.co.kr Published On :: Fri, 11 Oct 2024 14:35:57 +0900 [Culture] : South Korea's first Nobel laureate in literature, Han Kang, said she is surprised and absolutely honored to have won the prestigious prize. In a phone interview with the Swedish Academy, which awards the Nobel prizes, Han expressed appreciation for all the support she’s received. Asked for a comment ...[more...] Full Article Culture
abs Parameterized absorptive electron scattering factors By journals.iucr.org Published On :: 2024-01-25 In electron diffraction, thermal atomic motion produces incoherent scattering over a relatively wide angular range, which appears as a diffuse background that is usually subtracted from measurements of Bragg spot intensities in structure solution methods. The transfer of electron flux from Bragg spots to diffuse scatter is modelled using complex scattering factors f + if' in the Bloch wave methodology. In a two-beam Einstein model the imaginary `absorptive' scattering factor f' can be obtained by the evaluation of an integral containing f over all possible scattering angles. While more sophisticated models of diffuse scatter are widely used in the electron microscopy community, it is argued in this paper that this simple model is appropriate for current structure solution and refinement methods. The two-beam model is a straightforward numerical calculation, but even this simplistic approach can become time consuming for simulations of materials with large numbers of atoms in the unit cell and/or many incident beam orientations. Here, a parameterized form of f' is provided for 103 elements as neutral, spherical atoms that reduces calculation time considerably. Full Article text
abs Universal simulation of absorption effects for X-ray diffraction in reflection geometry By journals.iucr.org Published On :: 2024-06-07 Analytical calculations of absorption corrections for X-ray powder diffraction experiments on non-ideal samples with surface roughness, porosity or absorption contrasts from multiple phases require complex mathematical models to represent their material distribution. In a computational approach to this problem, a practicable ray-tracing algorithm is formulated which is capable of simulating angle-dependent absorption corrections in reflection geometry for any given rasterized sample model. Single or multiphase systems with arbitrary surface roughness, porosity and spatial distribution of the phases in any combination can be modeled on a voxel grid by assigning respective values to each voxel. The absorption corrections are calculated by tracing the attenuation of X-rays along their individual paths via a modified shear-warp algorithm. The algorithm is presented in detail and the results of simulated absorption corrections on samples with various surface modulations are discussed in the context of published experimental results. Full Article text
abs AnACor2.0: a GPU-accelerated open-source software package for analytical absorption corrections in X-ray crystallography By journals.iucr.org Published On :: AnACor2.0 significantly accelerates the calculation of analytical absorption corrections in long-wavelength crystallography, achieving up to 175× speed improvements. This enhancement is achieved through innovative sampling techniques, bisection and gridding methods, and optimized CUDA implementations, ensuring efficient and accurate results. Full Article text