cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Progress with All-Silicon Tandem Cells on Glass Using Silicon Quantum Dots in Silicon-Based Dielectric Matrices
Creators: name: Green, M.A.
name: Conibeer, G.
name: König, D.
name: Perez-Wurfl, I.
name: Gentle, A.
name: Huang, S.
name: Song, D.
name: Hao, X.
name: Gao, F.
name: Park, S.
name: Flynn, C.
name: So, Y.
name: Zhang, B.
name: Di, D.
name: Campbell, P.
name: Huang, Y.
name: Puzzer, T.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
New Materials, Cells and Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 15-18
description: Photovoltaics is destined to push to ever increasing performance due to the cost leverage provided by high
efficiency. Although a range of “third generation” techniques have been suggested for improving cell efficiency beyond
that of a single cell, so far the tandem cell approach is the only one to give improved performance in practice. Silicon
wafer-based modules have shown high levels of reliability. However, there are no obvious candidates for high-bandgap
compound semiconductors to use with silicon in tandem cells that would not compromise this reliability and stability, to
some extent, or depend upon toxic or scarce elements. This work seeks to engineer wide-bandgap, Si-compatible
materials by using quantum-confinement in silicon quantum dots (QDs) dispersed in a matrix of silicon carbide, nitride or
oxide.
ALICE overview
Creators: name: Räsänen, Sami S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent results from the ALICE experiment are presented with a particular emphasis on particle identification, the nuclear modification factor ($R_{AA}$) and azimuthal anisotropy ($v_2$). Comparison of lead-lead and proton-lead results reveals evidence of collectivity in small systems.
description: Proceedings of ICFNP 2015, 13 pages, 9 figures
The impact of enteric coating of aspirin on aspirin responsiveness in patients with suspected or newly diagnosed ischemic stroke: prospective cohort study: results from the (ECASIS) study
Creators: name: Elshafei, Mohamed Nabil
name: Imam, Yahia
name: Alsaud, Arwa Ebrahim
name: Chandra, Prem
name: Parray, Aijaz
name: Abdelmoneim, Mohamed S.
name: Obeidat, Khaldun
name: Saeid, Razan
name: Ali, Mohammad
name: Ayadathil, Raheem
name: Mohamed, Mouhand F. H.
name: Abdallah, Ibtihal M.
name: Mohammed, Shaban
name: Akhtar, Naveed
name: Danjuma, Mohammed Ibn-Masoud
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Pharmacology and pharmaceutical sciences

description: Background and purpose Uncertainty remains regarding the impact of enteric-coated aspirin (EC-ASA) on secondary prevention of ischemic stroke compared to plain aspirin (P-ASA). Hence, this study was designed to investigate the effect of EC formulation on ASA response via evaluating thromboxane B2 (TXB2) levels in patients with suspected or newly diagnosed stroke. Methods A prospective cohort study on suspected or newly diagnosed ischemic stroke patients who are aspirin-naive was conducted. Patients were received either EC aspirin or plain aspirin for at least 3 days. The primary outcome was the proportion of aspirin non-responsiveness between two groups (level of residual serum TXB2 associated with elevated thrombotic risk (< 99.0% inhibition or TXB2 > 3.1 ng/ml) within 72 h after three daily aspirin doses, while secondary outcomes were the incidence of early gastrointestinal tract (GIT) bleeding with the various aspirin preparations. (Trial registration: Clinicaltrials.gov NCT04330872 registered on 02 April 2020). Results Of 42 patients, ischemic strokes were confirmed in both P-ASA (81%) and EC-ASA (67%) arms. ASA non-responsiveness showed no significant difference between the two formulations (P-ASA vs. EC-ASA; 28.6% vs 23.8%; P = 0.726). Univariate and multivariate logistic regression analysis showed that patients treated with EC-ASA were more likely to have a lower rate of non-responders compared to P-ASA (unadjusted OR 0.78; 95% CI 0.20, 3.11); with the risk highest in type 2 diabetic patients with HBA1c > 6.5% (adjusted OR 6; 95% CI 1.02, 35.27; P = 0.047). No incidence of GIT bleeding observed throughout the study. Conclusion A significant proportion of ASA non-responsiveness was recorded regardless of ASA formulation administered. The increased risk of ASA non-responsiveness in diabetic patients needs further exploration by larger prospective studies.Other Information Published in: European Journal of Clinical Pharmacology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00228-022-03391-2
Viscous and Gravitational Fingering in Multiphase Compositional and Compressible Flow
Creators: name: Moortgat, Joachim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Viscous and gravitational fingering refer to flow instabilities in porous media that are triggered by adverse mobility or density ratios, respectively. These instabilities have been studied extensively in the past for 1) single-phase flow (e.g., contaminant transport in groundwater, first-contact-miscible displacement of oil by gas in hydrocarbon production), and 2) multi-phase immiscible and incompressible flow (e.g., water-alternating-gas (WAG) injection in oil reservoirs). Fingering in multiphase compositional and compressible flow has received much less attention, perhaps due to its high computational complexity. However, many important subsurface processes involve multiple phases that exchange species. Examples are carbon sequestration in saline aquifers and enhanced oil recovery (EOR) by gas or WAG injection below the minimum miscibility pressure. In multiphase flow, relative permeabilities affect the mobility contrast for a given viscosity ratio. Phase behavior can also change local fluid properties, which can either enhance or mitigate viscous and gravitational instabilities. This work presents a detailed study of fingering behavior in compositional multiphase flow in two and three dimensions and considers the effects of 1) Fickian diffusion, 2) mechanical dispersion, 3) flow rates, 4) domain size and geometry, 5) formation heterogeneities, 6) gravity, and 7) relative permeabilities. Results show that fingering in compositional multiphase flow is profoundly different from miscible conditions and upscaling techniques used for the latter case are unlikely to be generalizable to the former.
description: 32 pages, 20 figures, 2 tables
Medication errors in hospitals in the Middle East: a systematic review of prevalence, nature, severity and contributory factors
Creators: name: Thomas, Binny
name: Paudyal, Vibhu
name: MacLure, Katie
name: Pallivalapila, Abdulrouf
name: McLay, James
name: El Kassem, Wessam
name: Al Hail, Moza
name: Stewart, Derek
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Pharmacology and pharmaceutical sciences

description: The aim was to critically appraise, synthesise and present the evidence of medication errors amongst hospitalised patients in Middle Eastern countries, specifically prevalence, nature, severity and contributory factors. CINAHL, Embase, Medline, Pubmed and Science Direct were searched for studies published in English from 2000 to March 2018, with no exclusions. Study selection, quality assessment (using adapted STROBE checklists) and data extraction were conducted independently by two reviewers. A narrative approach to data synthesis was adopted; data related to error causation were synthesised according to Reason’s Accident Causation model. Searching yielded 452 articles, which were reduced to 50 following removal of duplicates and screening of titles, abstracts and full-papers. Studies were largely from Iran, Saudi Arabia, Egypt and Jordan. Thirty-two studies quantified errors; definitions of ‘medication error’ were inconsistent as were approaches to data collection, severity assessment, outcome measures and analysis. Of 13 studies reporting medication errors per ‘total number of medication orders’/ ‘number of prescriptions’, the median across all studies was 10% (IQR 2–35). Twenty-four studies reported contributory factors leading to errors. Synthesis according to Reason’s model identified the most common being active failures, largely slips (10 studies); lapses (9) and mistakes (12); error-provoking conditions, particularly lack of knowledge (13) and insufficient staffing levels (13) and latent conditions, commonly heavy workload (9). There is a need to improve the quality and reporting of studies from Middle Eastern countries. A standardised approach to quantifying medication errors’ prevalence, severity, outcomes and contributory factors is warranted.Other Information Published in: European Journal of Clinical Pharmacology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00228-019-02689-y
Demand Driven Integrated PV-System with Lithium-Ion Batteries for Storage to Boost Self Consumption
Creators: name: Dittmer, M.
name: Schmiegel, A.U.
name: Cousseau, J.-F.
name: Lippert, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3280-3284
description: The objective of the BMU funded R&D project “Sol-ion” is to develop an integrated system which
maximizes self consumption: Self produced PV power which exceeds simultaneous consumption is
stored in an appropriate local storage medium and injected into the grid only, if power is needed.
This paper presents the Sol-ion approach to develop a demand driven energy management system to
make use of PV generated energy by storage, feed-in and self consumption in a single system. We
will explain the concept and architecture of an integrated PV system with storage and first results
from simulation and prototype testing and its market impact potential.
Site-Specific Colloidal Crystal Nucleation by Template-enhanced Particle Transport
Creators: name: Mishra, Chandan K
name: Sood, A K
name: Ganapathy, Rajesh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The monomer surface mobility is the single most important parameter that decides the nucleation density and morphology of islands during thin film growth. During template-assisted surface growth in particular, low surface mobilities can prevent monomers from reaching target sites and this results in a partial to complete loss of nucleation control. While in atomic systems a broad range of surface mobilities can be readily accessed, for colloids, owing to their large size, this window is substantially narrow and therefore imposes severe restrictions in extending template-assisted growth techniques to steer their self-assembly. Here, we circumvented this fundamental limitation by designing templates with spatially varying feature sizes, in this case moire patterns, which in the presence of short-range depletion attraction presented surface energy gradients for the diffusing colloids. The templates serve a dual purpose, first, directing the particles to target sites by enhancing their surface mean free paths and second, dictating the size and symmetry of the growing crystallites. Using optical microscopy, we directly followed the nucleation and growth kinetics of colloidal islands on these surfaces at the single-particle level. We demonstrate nucleation control, with high fidelity, in a regime that has remained unaccessed in theoretical, numerical and experimental studies on atoms and molecules as well. Our findings pave the way for fabricating non-trivial surface architectures composed of complex colloids and nanoparticles.
description: 12 pages, 3 figures
Sliver Cell and Conventional Monocrystalline Silicon Modules: A Performance Comparison
Creators: name: Stocks, M.
name: Balla, C.
name: McCaffrey, P.
name: Seymour, J.
name: Kerr, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3206-3210
description: Modules built with SLIVER technology have a number of performance advantages compared to
conventional solar modules. The outdoor performance of Series II SLIVER modules (SVR92) is compared to
conventional monocrystalline silicon modules over 10 months. The energy yield (harvest) of the Series II SLIVER
modules was 8.6% higher than the conventional system. The SLIVER module demonstrated significant advantages
in warmer months when illumination levels were high due to lower operating temperatures and lower power
temperature coefficients and outperformed the conventional modules at low light levels due to superior shunt
resistance. SLIVER modules are also tolerant of partial shading due to the series/parallel layout and have
demonstrated excellent reliability during accelerated testing.
Competition and microcredit interest rates: international evidence
Creators: name: Al-Azzam, Moh’d
name: Parmeter, Christopher
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Applied economics
subject: Sociology
subject: FOS: Sociology

description: The limited number of existing papers that link competition among microfinance institutions (MFIs) and microcredit interest rates, provide inconclusive and counterintuitive results. This paper uses data from 1997 MFIs operating in 109 countries between the years 2003 and 2016 to construct three measures of competition and evaluate their impacts on interest rates. These measures reflect three different aspects of competition: geographical expansion, market concentration, and the marginal pricing. While the results for market concentration are inconclusive, the results for both geographical expansion and marginal pricing show an economically strong impact of competition on interest rates. Specifically, regardless of whether an MFI is a for-profit or nonprofit, we find meaningful evidence that competition reduces interest rates. Our findings evince that lower interest rates are needed if the microfinance movement is to continue to be relied on as an effective means to alleviate poverty.Other Information Published in: Empirical Economics
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00181-019-01766-6
Anterior ankle impingment syndrome is less frequent, but associated with a longer absence and higher re-injury rate compared to posterior syndrome: a prospective cohort study of 6754 male professional soccer players
Creators: name: D’Hooghe, Pieter
name: Waldén, Markus
name: Hägglund, Martin
name: Bengtsson, Håkan
name: Ekstrand, Jan
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Purpose To study the epidemiology and return to play characteristics of anterior and posterior ankle impingement syndromes (AAIS and PAIS) over 18 consecutive seasons in male professional soccer players. Methods Between the 2001–2002 and 2018–2019 seasons, 120 European soccer teams were followed prospectively for various seasons. Time loss injuries and player exposures were recorded individually in 6754 unique players. Injury incidence and burden were reported as the number of injuries and days absence per 1000 h with 95% confidence intervals (CIs). Injury severity was reported as median absence in days with the interquartile range (IQR). Results Out of 25,462 reported injuries, 93 (0.4%) were diagnosed as AAIS (38%) or PAIS (62%) in 77 players. AAIS and PAIS were similar regarding injury characteristics except for a greater proportion of AAIS having a gradual onset (69% vs.47%; P = 0.03) and being re-injuries (31% vs. 9%; P = 0.01). Impingement syndromes resulted in an overall incidence of 0.03 injuries (95% CI 0.02–0.03) per 1000 h and an injury burden of 0.4 absence days per 1000 h. PAIS incidence was significantly higher than that for AAIS [0.02 (95% CI 0.002–0.03) vs. 0.01 (95% CI 0.005–0.01) injuries per 1000 h (RR = 1.7). The absence was significantly longer in AAIS than in PAIS [10 (22) vs. 6 (11) days; P = 0.023]. Impingement syndromes that presented with a gradual onset had longer absences in comparison to impingement with an acute onset [8 (22) vs. 5 (11) days; P = 0.014]. Match play was associated with a higher incidence and greater injury burden than training: 0.08 vs. 0.02 injuries per 1000 h (RR 4.7), respectively, and 0.9 vs. 0.3 days absence per 1000 h (RR 2.5). Conclusion Ankle injuries are frequent in men’s professional soccer and ankle impingement is increasingly recognized as a common source of pain, limited range of motion, and potential time loss. In our study, ankle impingement was the cause of time loss in less than 0.5% of all injuries. PAIS was more frequently reported than AAIS, but AAIS was associated with more absence days and a higher re-injury rate than PAIS. The findings in this study can assist the physician in best practice management on ankle impingment syndromes in professional football. Level of evidence II.Other Information Published in: Knee Surgery, Sports Traumatology, Arthroscopy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00167-022-07004-4
Chiral Random Matrix Model at Finite Chemical Potential: Characteristic Determinant and Edge Universality
Creators: name: Liu, Yizhuang
name: Nowak, Maciej A.
name: Zahed, Ismail
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We derive an exact formula for the stochastic evolution of the characteristic determinant of a class of deformed Wishart matrices following from a chiral random matrix model of QCD at finite chemical potential. In the WKB approximation, the characteristic determinant describes a sharp droplet of eigenvalues that deforms and expands at large stochastic times. Beyond the WKB limit, the edges of the droplet are fuzzy and described by universal edge functions. At the chiral point, the characteristic determinant in the microscopic limit is universal. Remarkably, the physical chiral condensate at finite chemical potential may be extracted from current and quenched lattice Dirac spectra using the universal edge scaling laws, without having to solve the QCD sign problem.
description: 16 pages, 4 figures
A systematic review evaluating the clinimetric properties of the Victorian Institute of Sport Assessment (VISA) questionnaires for lower limb tendinopathy shows moderate to high-quality evidence for sufficient reliability, validity and responsiveness—part II
Creators: name: Korakakis, Vasileios
name: Whiteley, Rod
name: Kotsifaki, Argyro
name: Stefanakis, Manos
name: Sotiralis, Yiannis
name: Thorborg, Kristian
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Purpose The evaluation of measurement properties such as reliability, measurement error, construct validity, and responsiveness provides information on the quality of the scale as a whole, rather than on an item level. We aimed to synthesize the measurement properties referring to reliability, measurement error, construct validity, and responsiveness of the Victorian Institute of Sport Assessment questionnaires (Achilles tendon—VISA-A, greater trochanteric pain syndrome—VISA-G, proximal hamstring tendinopathy—VISA-H, patellar tendon—VISA-P). Methods A systematic review was conducted according to Consensus-based Standards for the Selection of Health Measurement Instruments methodology (COSMIN). PubMed, Cochrane, CINAHL, EMBASE, Web of Science, SportsDiscus, grey literature, and reference lists were searched. Studies assessing the measurement properties concerning reliability, validity, and responsiveness of the VISA questionnaires in patients with lower limb tendinopathies were included. Two reviewers assessed the methodological quality of studies assessing reliability, validity, and responsiveness using the COSMIN guidelines and the evidence for these measurement properties. A modified Grading of Recommendations Assessment Development and Evaluation (GRADE) approach was applied to the evidence synthesis. Results There is moderate-quality evidence for sufficient VISA-A, VISA-G, and VISA-P reliability. There is moderate-quality evidence for sufficient VISA-G and VISA-P measurement error, and high-quality evidence for sufficient construct validity for all the VISA questionnaires. Furthermore, high-quality evidence exists with regard to VISA-A for sufficient responsiveness in patients with insertional Achilles tendinopathy following conservative interventions. Conclusions Sufficient reliability, measurement error, construct validity and responsiveness were found for the VISA questionnaires with variable quality of evidence except for VISA-A which displayed insufficient measurement error. Level of evidence IV. Registration details Prospero (CRD42018107671); PROSPERO reference—CRD42019126595.Other Information Published in: Knee Surgery, Sports Traumatology, Arthroscopy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00167-021-06557-0
All-terrain vehicle (ATV)-related injuries among different age groups: insights from a 9-year observational study
Creators: name: Abdelrahman, Husham
name: Khan, Naushad Ahmad
name: El-Menyar, Ayman
name: Consunji, Rafael
name: Asim, Mohammad
name: Alani, Mushrek
name: Shunni, Adam
name: Al-Aieb, Abubaker
name: Al-Thani, Hassan
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Purpose To describe the epidemiology, patterns, seasonality and outcome of all-terrain vehicle-related injuries (ATVRIs) among different age groups in Qatar. Methods A retrospective analysis of all patients hospitalized with ATVRI from 2010 to 2018 was conducted. Data were analyzed by age, gender, seasonality, and Injury severity Score (ISS). Chi-square, Student t and ANOVA tests were used for analysis. Multivariate regression analysis was performed to find out predictors of head injury and severe injury among ATV users. Results Out of 15,000 trauma admissions, 521 had ATVRI (4%) with a mean age of 23.3 ± 12.3. The male-to-female ratio was 4:1 and the pediatric population represented 40%. The compliance with helmet use was 3.6%. The most injured regions were chest (29.8%), upper extremities (28.8%) and the head (25.9%). The mean ISS was 10.6 ± 7.7. Fracture fixation was the most operative intervention. Among hospitalized patients, 7.7% were transferred to rehabilitation . ATVRIs occurred more frequently between October and April and a large proportion (57.8%) occurred during weekends. The overall ATV-related hospital mortality rate was 2.1%. Young and older ATV users were more likely to suffer spine injuries than the pediatric population (p = 0.001). The mean ISS was greater in the older groups (p = 0.03). There were no statistically significant differences regarding the use of protective devices, mortality, or length of hospital stay between the different age groups. On multivariate analysis, young age and ISS were predictors of head injury among ATV users after adjusting for gender and helmet use. Conclusion This is a nationwide study looking at all age groups who sustained ATVRI in Qatar. ATVRIs were observed in all age groups following leisure and recreational use. It follows a seasonal pattern with poor protective measures compliance. There is a need to reinforce helmet use and raise public awareness.Other Information Published in: European Journal of Trauma and Emergency Surgery
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00068-022-01984-1
Ferromagnetism and particle collisions: applications to protoplanetary disks and the meteoritical record
Creators: name: Hubbard, Alexander
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The meteoritical record shows both iron partitioning and tungsten isotopic partitioning between matrix and chondrules. Tungsten is not abundant enough to have driven its own isotopic partitioning, but if tungsten were correlated with iron, then ferromagnetic interactions grains could help explain both observations. We derive a practical parameterization for the increase in particle-particle collision rates caused by mutually attracting particle magnetic dipole moments. While the appropriate magnetic parameters remain uncertain, we show that ambient magnetic fields in protoplanetary disks are expected to be strong enough to magnetize iron metal bearing dust grains sufficiently to drive large increases in their collision rates. Such increased collision rates between iron metal rich grains could help preserve primordial iron and W isotopic inhomogeneities; and would help explain why the meteoritical record shows their partitioning in the solar nebula. The importance of magnetic interactions for larger grains whose growth is balanced by fragmentation is less clear, and will require future laboratory or numerical studies.
description: 9 pages, 4 figures, accepted, ApJ
Analysis of PV Modules by Electroluminescence and IR Thermography
Creators: name: Hoyer, U.
name: Burkert, A.
name: Auer, R.
name: Buerhop, C.
name: Vodermayer, C.
name: Mayer, M.
name: Wotruba, G.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3262-3266
description: Methods for the interpretation of the combination of different image guided infrared measurements of
PV modules are introduced. It is shown how certain defects that influence the series resistance or the short circuit
current, manifest themselves in the illuminated thermographic image for different loads corresponding to certain
states on the I-V characteristic. The thermal behavior of cells in a module in short circuit condition is explained. For
the verification of the methods 8 modules of a 4.5 year old PV generator were demounted and analyzed. Four of them
did show thermal aberrations during operation, while the other four did not. The defects were identified as shunts and
defects in the interconnection.
Prevalence and patterns of maxillofacial trauma: a retrospective descriptive study
Creators: name: Al-Hassani, Ammar
name: Ahmad, Khalid
name: El-Menyar, Ayman
name: Abutaka, Ahmad
name: Mekkodathil, Ahammed
name: Peralta, Ruben
name: Al Khalil, Moustafa
name: Al-Thani, Hassan
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Introduction We aimed to describe the prevalence and pattern of maxillofacial trauma in Qatar. Methods This is a retrospective study of trauma registry data at Hamad General Hospital during the period from January 2011 to December 2014. The study included all traumatic maxillofacial patients who underwent CT scan and were admitted during the study period. Results A total of 1187 patients with maxillofacial injuries were included in the study and 18.5% of all trauma admissions were related to maxillofacial injuries. Young age and males were predominantly affected. Mechanisms of injury were mainly traffic-related and fall. Orbital injuries were the commonest followed by maxillary injuries. The median and range face abbreviated injury score (AIS) was 2 [1–3] with 66% had a score of 2. Maxillofacial fractures were frequently associated with traumatic brain injuries. One out of five patients was managed with surgery and had median length of stays in ICU and hospital 5 and 7 days, respectively. Overall, in-hospital mortality was 8.3%. Mortality in isolated maxillofacial was low (0.3%) in comparison to 15% in polytrauma patients (p = 0.001). Multivariable regression analysis showed that Injury Severity Score, face AIS and Glasgow Coma Scale were predictors of mortality with age-adjusted odd ratio of 1.15, 2.48 and 0.82; respectively. Conclusions Maxillofacial trauma requiring admission is not uncommon in our trauma center and mostly it is mild to moderate in severity. Associated injuries are present in most of the maxillofacial injured patients and further diagnostic investigations should be part of the assessment in maxillofacial injuries.Other Information Published in: European Journal of Trauma and Emergency Surgery
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00068-019-01174-6
Increasing consultant-level staffing as a proportion of overall physician coverage improves emergency department length of stay targets
Creators: name: Jenkins, Dominic
name: Thomas, Sarah A.
name: Pathan, Sameer A.
name: Thomas, Stephen H.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Objectives One goal of Emergency Department (ED) operations is achieving an overall length of stay (LOS) that is less than four hours. The goal of the current study was to assess for association between increasing number of on-duty EM Consultants and LOS, while adjusting for overall (all-grade) on-duty emergency doctors’ numbers and other operational factors. Methods This was a retrospective analysis of three years (2016–2019) of data, employing a unit of analysis of 3276 eight-hour ED shifts. The study was conducted using a prospectively populated ED database in a busy (annual census 420,000) Middle Eastern ED with staffing by Consultants and multiple non-Consultant grades (Specialists, fellows, and residents). Using logistic regression, the main predictor variable of “on-duty Consultant n” was assessed for association with the study’s primary (dichotomous) endpoint: whether a shift’s median LOS met the target of < 240 min. Linear regression was used to assess for association between on-duty Consultant n and the study’s secondary (continuous) endpoint: median LOS for the ED shift. Results Multivariate logistic regression adjusting for a number of operations factors (including total EP on-duty complement) identified an association between increasing n of on-duty Consultants and the likelihood of a shift’s meeting the 4-h ED LOS target (OR 1.27, 95% CI 1.20 to 1.34, p < .0001). Multiple linear regression, which also adjusted for total on-duty EP n and other operational factors, also indicated LOS benefit from more on-duty Consultants: each additional on-duty Consultant was associated with a shift’s median LOS improving by 5.4 min (95% CI 4.3 to 6.5, p < .0001). Conclusions At the study site, in models that adjusted for overall on-duty EP numbers as well as myriad other operational factors, increasing numbers of on-duty Consultants was associated with a statistically and operationally significant reduction in ED LOS.Other Information Published in: BMC Emergency Medicine
 License: http://creativecommons.org/licenses/by/4.0/
See article on publisher's website: http://dx.doi.org/10.1186/s12873-020-00399-8
Key Aspects of Module Design that Influence Energy Generation
Creators: name: Cunningham, D.W.
name: Amin, D.
name: Miller, J.
name: Nguyen, A.M.
name: Parr, A.
name: Wohlgemuth, J.H.
name: Xia, Z.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3217-3221
description: Within the Solar Industry the drive to guaranteeing long term performance of PV systems has led to a
growing interest in products with improved energy efficiency. This has been driven by defined energy purchases as
described in power purchase agreements. In the past, the performance metric for solar systems was based on STC
performance or rated power alone. More and more, PV systems especially at the utility scale need to determine the
competitiveness of their energy generation cost with that of other sources. In determining the total levelized cost of
electricity (LCOE), system design aspects such as component reliability, power plant capacity factor, depreciation
benefit, etc, will affect the overall cost of electricity. However, the single most important driver for the performance
of any system is its energy production when deployed in a real world scenario. This paper describes the approach BP
Solar has taken to maximize the energy output from their products by tailoring module electrical, optical, and thermal
properties. By reducing series resistance losses, reducing light reflection from the glass surface, and improving heat
flow through the module back, energy production of the assembly package has been increased by 7%. As a result, the
impact of these improvements on the total lifetime energy yield and on the total efficiency of the product is very
significant.
Chemical abundance gradients from open clusters in the Milky Way disk: results from the APOGEE survey
Creators: name: Cunha, Katia
name: Frinchaboy, Peter M.
name: Souto, Diogo
name: Thompson, Benjamin
name: Zasowski, Gail
name: Prieto, Carlos Allende
name: Carrera, Ricardo
name: Chiappini, Cristina
name: Donor, John
name: Garcia-Hernandez, Anibal
name: Perez, Ana Elia Garcia
name: Hayden, Michael R.
name: Holtzman, Jon
name: Jackson, Kelly M.
name: Johnson, Jennifer A.
name: Majewski, Steven R.
name: Meszaros, Szabolcs
name: Meyer, Brianne
name: Nidever, David L.
name: O'Connell, Julia
name: Schiavon, Ricardo P.
name: Schultheis, Mathias
name: Shetrone, Matthew
name: Simmons, Audrey
name: Smith, Verne V.
name: Zamora, Olga
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Metallicity gradients provide strong constraints for understanding the chemical evolution of the Galaxy. We report on radial abundance gradients of Fe, Ni, Ca, Si, and Mg obtained from a sample of 304 red-giant members of 29 disk open clusters, mostly concentrated at galactocentric distances between ~8 - 15 kpc, but including two open clusters in the outer disk. The observations are from the APOGEE survey. The chemical abundances were derived automatically by the ASPCAP pipeline and these are part of the SDSS III Data Release 12. The gradients, obtained from least squares fits to the data, are relatively flat, with slopes ranging from -0.026 to -0.033 dex/kpc for the alpha-elements [O/H], [Ca/H], [Si/H] and [Mg/H] and -0.035 dex/kpc and -0.040 dex/kpc for [Fe/H] and [Ni/H], respectively. Our results are not at odds with the possibility that metallicity ([Fe/H]) gradients are steeper in the inner disk (R_GC ~7 - 12 kpc) and flatter towards the outer disk. The open cluster sample studied spans a significant range in age. When breaking the sample into age bins, there is some indication that the younger open cluster population in our sample (log age < 8.7) has a flatter metallicity gradient when compared with the gradients obtained from older open clusters.
description: 4 pages, 3 figures, To appear in Astronomische Nachrichten, special issue "Reconstruction the Milky Way's History: Spectroscopic surveys, Asteroseismology and Chemo-dynamical models", Guest Editors C. Chiappini, J. Montalb\'an, and M. Steffen, AN 2016 (in press)"
Quantitative Analysis of PV-Modules by Electroluminescence Images for Quality Control
Creators: name: Köntges, M.
name: Siebert, M.
name: Hinken, D.
name: Eitner, U.
name: Bothe, K.
name: Potthof, T.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3226-3231
description: We present a non-destructive measurement technique to determine the operating voltage of individual
solar cells in industrial manufactured photovoltaic (PV) module. This technique is based on electroluminescence
imaging and makes use of two physical observations. First, the highest electroluminescence signal of each solar cell
is proportional to its operating voltage and second, the sum of all operating voltages equals the externally applied PV
module voltage. Thus, the measurement of the peak signals in the electroluminescence image for each cell provides
the operating cell voltages. The reliability of this relation is verified by applying the method to a specially prepared
PV module where we measure the individual operating cell voltages directly on exposed interconnectors. The cell
voltages experimentally measured by EL are determined with a high accuracy of ± 0.6%. Moreover, the operating
cell voltages determined from the electroluminescence image are used to calculate the PV module series resistance.
We call this method “voltage imaging of the PV module” (VIM). Furthermore we present image pre-processing
methods to reduce the impact of a number of artificial effects to our VIM approach.
Occurrence of Electric Arcs in Crystalline Silicon PV Modules
Creators: name: Reil, F.
name: Herrmann, W.
name: Vaaßen, W.
name: Zornikau, J.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3232-3236
description: This scientific work reflects experiments that were conducted to estimate the material-specific, thermal
and electrical requirements that are necessary to allow electric arcs in PV modules to occur. Furthermore, different
conductors on module level were prepared and intentionally cut to force the occurrence of electric arcs and evaluate
the resulting damage on material site. Following these experiments, carried out at TÜV Rheinland laboratories, a risk
analysis was given for separate sections of a PV module. Dependant on the awareness of these results and recognition
of the outcome of such electric arcs, this paper finally points at the possibilities and existing concepts for arc prevention.
The difficulty in finding a standardized test method is rooted in the complexity of this topic. Also relating to the
requirements for arc ignition, proposals and guidelines for manufacturers are given that should be taken up as production
line and quality assurance measures to prevent the occurrence of electric arcs.
Diversifying relationships: Russian policy toward GCC
Creators: name: Issaev, Leonid
name: Kozhanov, Nikolay
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Political science
subject: FOS: Political science

description: The interaction between Russia and Gulf countries represents the story of ups and downs, severe conflicts and sharp warmings that can largely be explained by the permanently changing role and place of each of these players at the global and Middle Eastern political arenas. After Russia's “return” to the Middle East in 2012–2015, Moscow's foreign policy towards the Gulf can be explained in terms of a bargaining strategy. On the one hand, Russia is trying to underline its importance and relevance to the GCC by putting forward diplomatic and political initiatives. The Kremlin uses its direct or indirect presence in the key regional conflicts such as the Syrian, Libyan and Yemeni civil wars as well as the Israeli-Palestinian conflict and Iran’s nuclear issue. On the other hand, Russia is interested in building up stronger economic cooperation with the GCC, drawing bigger volumes of investments from the Gulf to Russia’s broken economy, as well as coordinating efforts with Saudi Arabia in the global oil market. While, in the near future, the qualitative evolution of Russia’s relations with the GCC is hardly possible, there are still options for their deepening within the current level of interaction between Moscow and the Gulf.Other Information Published in: International Politics
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1057/s41311-021-00286-4
Density modulation-induced absolute laser-plasma-instabilities: simulations and theory
Creators: name: Li, J.
name: Yan, R.
name: Ren, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Fluid simulations show that when a sinusoidal density modulation is superimposed on a linear density profile, convective instabilities can become absolutely unstable. This conversion can occur for two-plasmon-decay and stimulated Raman Scattering instabilities under realistic direct-drive inertial confinement fusion conditions and can affect hot electron generation and laser energy deposition. Analysis of the three-wave model shows that a sufficiently large change of the density gradient in a linear density profile can turn convective instabilities into absolute ones. An analytical expression is given for the threshold of the gradient change, which depends on the convective gain only.
description: 5 pages, 2 figures
Accelerated Ageing of Seven Different Thin-Film Module Types by Sequential Exposure to Damp Heat or Damp Heat with either Additional Applied Voltage or Ultraviolet Light
Creators: name: Sample, T.
name: Skoczek, A.
name: Field, M.
name: Köhl, M.
name: Geyer, D.
name: Herrmann, W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3241-3247
description: In this paper we have investigated the accelerated ageing of seven different thin-film module types
through the use of sequential damp heat (85oC/85% RH) or damp heat tests with additional stress factors such as
applied voltage or ultraviolet light. The module types [a-Si, tandem a-Si/a-Si micro-morph a-Si/μ-Si, triple junction
a-Si, CIS (x2) and CdTe] were selected to cover a range of thin-film devices, materials and construction types.
Sequential damp heat tests for cumulative exposure times of 250, 1000, 2000, 3000 and 4000h have been achieved to
date, with the modules subjected to visual inspection, electrical insulation measurements and electrical performance
measurements (IV curves). A wide range of performance losses (Pmax), from practically zero to -88%, were evident
for the different technologies.
The damp heat tests with applied voltage provoked very fast (<500h) degradation of some modules, with the critical
factor being the use of glass in the module construction rather than the semi-conductor type of thin-film technology.
Initial exposure, up to 500h, to a combined ultraviolet light and damp heat test has yet to provoke any significant
damage.
Sequential damp heat exposure tests can be used to induce accelerated aging on thin-film modules. However, it is not
possible to equate loss of power to a number of years of outdoor exposure due to the lack of knowledge of the
acceleration factors for each PV module type.
Supplementary document for All-optical organic photochemical integrated nanophotonic memory: low-loss, continuously-tunable, non-volatile - 7118893.pdf
Creators: name: Bilodeau, Simon
name: Doris, Eli
name: Wisch, Jesse
name: Gui, Manting
name: Rand, Barry
name: Shastri, Bhavin
name: Prucnal, Paul
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Supplements
Open Superstring Field Theory on the Restricted Hilbert Space
Creators: name: Konopka, Sebastian
name: Sachs, Ivo
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently an action for open superstring field theory was proposed where the Neveu-Schwarz sector is formulated in the large Hilbert space while the Ramond sector lives in a restriction of the small Hilbert space. The purpose of this note is to clarify the relation of the restricted Hilbert space with other approaches and to formulate open superstring field theory entirely in the small Hilbert space.
description: 10 pages
A pulsed multiband UWB transmitter and receiver with beamforming for high data-rate WPAN applications
Creators: name: Ko, Jaegan
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Ultra wideband communication
Pulsed multiband transmitter
Beamforming
Mixers
Frequency hopping
LNA
Phase locked loops
Receiver
CMOS integrated circuits
Sinusoidal synthesis

description: Personal devices for recording high-quality video and photographs, and display systems for their playback are ubiquitous. Currently, the resolution for ultra high definition (UHD) video format is more than 33 megapixels (7680x4320), while cameras for mobile phones have reached the range of 40 megapixels. The media files used or generated in such devices can be very large. Sharing and using these files across devices such as smartphones, personal computers, and external storage drives, requires fast-transfer capability, which can be of the order of Gbps or higher. Additionally, high-resolution monitors and televisions also require streaming of display data at similar rates unless video compression is employed, which may not be desirable since it can cause noticeable latency or visual defects. With the popularity of smartphones and mobile devices, it is preferable to perform the tasks of transferring files and display streaming by employing power-efficient wireless data links, in order to ensure a good user experience. This dissertation presents an ultra-wideband (UWB) wireless communication system for such high data-rate and short-range applications. The proposed pulsed, multiband signaling with frequency hopping complies with the UWB regulation in Europe. This regulation is chosen merely for the purpose of demonstration. The approach itself can be easily adapted to different frequency bands, and hence is inherently flexible. It enables low-power implementation by adopting a low-complexity architecture, that allows for pulse-based signaling with subband channelization. Moreover, dividing the target spectrum into multiple narrow subbands reduces the power overhead in implementing beamforming at the receiver. Beamforming helps to increase the signal-to-noise ratio (SNR) and provides directivity in the receiver for immunity against multipath and interference, which enhances overall link robustness. A 1-Gbps wireless communication link is demonstrated over a range of 2-meters, as part of this research, employing prototype integrated transceiver ICs that were implemented in a 65-nm CMOS technology. The transmitter IC consumes 221 mW, and the receiver IC with 4-element beamforming dissipates 211 mW. The system employs UWB spectrum from 6-8.5 GHz
How does internal governance affect banks’ financial stability? Empirical evidence from Egypt
Creators: name: Marie, Mohamed
name: Kamel, Hany
name: Elbendary, Israa
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Strategy, management and organisational behaviour
Applied economics

description: This paper investigates whether internal governance mechanisms were associated with the financial stability of Egyptian banks over the period 2010–2019. To this end, a GMM regression analysis was employed using 252 firm-year observations. The results, in general, indicate that the level of banks’ financial stability is positively associated with board size, board meetings, and board gender. In contrast, the results show that board education and the ownership of shares by directors are negatively associated with banks’ financial stability. More interestingly, our results demonstrate that higher financial stability is significantly associated with lower board independence, the presence of CEO duality, and fewer audit committee meetings. These striking results can be attributed to the argument that the presence of independent directors on the board may reduce the CEO’s willingness to share information with board members, causing a high level of uncertainty in the decision-making process, which ultimately leads to a reduction in the financial stability of their bank.Other Information Published in: International Journal of Disclosure and Governance
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1057/s41310-021-00110-8