bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of electronic and optical properties of BiTaO4 for photocatalysis
Authors: Nisar Jawad , Almeida Silva Luciana , Gomes Almeida Cristiane , Santos Mascarenhas Artur José , Wang Baochang , Moysés Araújo Carlos , Ahuja Rajeev , Pepe Iuri , Souza de Almeida Jailton , Ferreira da Silva Antonio 
Published: May 2012

AbstractWe present the optical absorption spectrum of BiTaO4 using the photo acoustic spectroscopy (PAS) technique and first principles approach. Band gap have been estimated 2.65 and 2.45 eV using PAS method and DFT calculations, respectively. Position of reduction and oxidation level with respect to vacuum level are identified, which shows that BiTaO4 can be used as photocatalyst for hydrogen production. Electronic structure is explained by plotting total density of states (TDOS) (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Thermal annealing effect on the properties of GaBiAs
Authors: Butkutė Renata , Pačebutas Vaidas , Čechavičius Bronius , Adomavičius Ramūnas , Koroliov Anton , Krotkus Arūnas 
Published: May 2012

AbstractThe influence of thermal annealing on optical properties and carrier lifetime of dilute GaBixAs1‐x layers was investigated. Thick (0.5‐1.5 μm) relaxed and thin (30‐100 nm) strained bismide layers were grown onto semi‐insulating (100)‐oriented GaAs substrates by molecular beam epitaxy (MBE) using As4 and As2, respectively. The post‐growth annealing was carried out in the rapid thermal annealing (RTA) oven at the temperatures ranging from 550 °C to 750 °C under nitrogen atmosphere. The high resolution X‐ray diffraction (HRXRD), photoluminescence (PL) and optical pump‐THz probe measurements revealed two different GaBixAs1‐x anneal mechanisms. The annealing at temperatures higher than 600 °C caused a significant reduction of carrier lifetime of relaxed bismide layers with x > 0.05. Meanwhile, thick layers with a smaller content of Bi (x < 0.05) and thin strained layers annealed up to 600 °C still exhibited long carrier lifetimes. On the other hand, the significant photoluminescence signal increase at room and liquid nitrogen temperatures was observed for the GaBiAs layers grown using As2 (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Photovoltaic properties of Si–NiO structure
Authors: Paranichev Daniil , Velichko Andrey , Putrolaynen Vadim , Grishin Alex 
Published: May 2012

AbstractThe investigation of the photovoltaic properties of a Si‐NiO structure was carried out. NiO films were prepared by thermal oxidation of metallic nickel at different temperatures. The load and luminous characteristics were obtained, and on the basis of these measurements the efficiency, fill factor, short circuit current and open‐circuit voltage were determined. Finally, possible mechanisms of the observed phenomena, as well as the possibility of their use for optoelectronic devices, are briefly discussed (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Aluminum diffusion in ZnTe films grown on GaSb substrates for n‐type doping
Authors: DiNezza Michael J. , Zhang Qiang , Ding Ding , Fan Jin , Liu Xinyu , Furdyna Jacek K. , Zhang Yong‐Hang 
Published: May 2012

AbstractZnTe PN homojunctions are fabricated using thermal diffusion of Al into a ZnTe film grown on lattice‐matched GaSb substrates by molecular beam epitaxy. Rectifying J‐V characteristics and the photovoltaic effect are observed which suggests that n‐type ZnTe has been successfully achieved. The reverse bias breakdown voltage is found to be dependent on annealing condition and acceptor concentration, and the trend agrees with PN junction theory. Secondary ion mass spectrometer depth profiles of the Al film show that Zn and Te out‐diffuse into the Al film during annealing. This out‐diffusion is undesirable because it may result in Zn vacancies which compensate Al donor atoms. Photoluminescence measurements of annealed ZnTe samples without the Al diffusion layer show strong band‐edge luminescence at room temperature. Midgap luminescence also appears for annealed samples but the intensity is lower than the band‐edge peak. This technique may lead to a better understanding of the n‐type doping problem for ZnTe, and could lead to in‐situdoping techniques and treatments. Successful n‐type doping of ZnTe with low resistivity will enable high‐efficiency optoelectronic devices operating at pure‐green wavelengths (550 nm) (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Thermal instability of HfO2 on InP structure with ultrathin Al2O3 interface passivation layer
Authors: An Chee‐Hong , Byun Young‐Chul , Cho Mann‐Ho , Kim Hyoungsub 
Published: May 2012

AbstractWe studied the thermal stability of HfO2 on an InP structure when an Al2O3 interface passivation layer (PL) was introduced. In contrast to the thick (∼4 nm) Al2O3‐PL, an almost complete disappearance of the thin (∼1 nm) Al2O3‐PL was observed after a post‐deposition anneal at 600 °C. Based on various chemical and electrical analyses, this was attributed to the intermixing of the thin Al2O3‐PL with HfO2, which might have been accompanied by the out‐diffusion of a substantial amount of substrate elements. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Set membership state estimation with improved zonotopic description of feasible solution set
Authors: Chai Wei , Sun Xianfang , Qiao Junfei 
Published: May 2012

SUMMARYThis paper proposes an improved zonotopic method to set membership state estimation for nonlinear discrete‐time systems with a bounded description of noise and parameters. According to the previous method, a zonotope containing the uncertain trajectory of the system is computed using interval arithmetic in the time update. In the observation update, an improved intersection algorithm of zonotope and strip is used to obtain a zonotope bounding the intersection of the uncertain trajectory with the region of the state space consistent with the observed output. This obtained zonotope is used to describe the feasible solution set of state. It is proven that the zonotope obtained by the improved algorithm can be tighter than the one obtained by the previous algorithm. Simulation experiments are conducted showing the performance of the improved state estimation method as compared with the previous one. Two types of noise distribution are considered. The results expose the weakness of the previous method and illustrate the effectiveness of the improvement. Copyright © 2012 John Wiley & Sons, Ltd.
Almost sure exponential convergence to consensus of random gossip algorithms
Authors: Picci Giorgio , Taylor Thomas J. 
Published: May 2012

SUMMARYIn this paper, we provide a proof of almost sure exponential convergence to consensus for a general class of ergodic edge selection processes. The proof is based on the multiplicative ergodic theorem of Oseledec and also applies to continuous time gossip algorithms. An example of exponential convergence in a non ergodic case is also discussed. Copyright © 2012 John Wiley & Sons, Ltd.
Top management team functional diversity and organizational innovation in China: The moderating effects of environment
Authors: Qian Cuili , Cao Qing , Takeuchi Riki 
Published: May 2012

AbstractWhile conflicts (cognitive and affective) have been considered as important process variables to better understand the mixed findings on the relationship between top management team functional diversity and organizational innovation, such an input‐process‐outcome model is still incomplete without considering the environmental factors. This study was formulated to assess the importance of both competitive and institutional environments in moderating such upper echelon effects within a transition economy. The chief executive officers and chief technology officers of 122 Chinese firms were surveyed and both competitive uncertainty and institutional support were found to shape top management team decision making processes and their outcomes. Copyright © 2012 John Wiley & Sons, Ltd.
Maternal hemodynamics at 11–13 weeks of gestation and preterm birth
Authors: Khalil A. , Elkhouli M. , Garcia‐Mandujano R. , Chiriac R. , Nicolaides K. H. 
Published: May 2012

AbstractObjectiveWomen who experience preterm birth (PTB) are at increased risk of cardiovascular morbidity and mortality in the subsequent decades. Individuals with cardiovascular disorders have increased central aortic systolic blood pressure (SBPAo) and arterial stiffness, assessed by pulse wave velocity (PWV) and augmentation index (AIx). The aim of this screening study was to evaluate SBPAo, PWV and AIx at 11–13 weeks' gestation in women who delivered preterm.MethodsThis was a prospective study in singleton pregnancies at 11 + 0 to 13 + 6 weeks' gestation. Maternal history and characteristics were recorded, and PWV, AIx and SBPAo were measured. We compared these parameters in women who had spontaneous (n = 244) or iatrogenic (n = 110) PTB before 37 weeks' gestation and before 34 weeks with those in women who had term delivery (n = 7489).ResultsCompared with women who had term delivery, women who had iatrogenic PTB had significantly higher AIx (1.08 (interquartile range (IQR), 0.91–1.27) multiples of the median (MoM), vs. 1.00 (IQR, 0.86–1.16) MoM) and SBPAo (1.06 (IQR, 0.98–1.15) MoM vs. 1.00 (IQR, 0.93–1.07) MoM). However, there was no significant difference in AIx, PWV or SBPAo between those who had spontaneous PTB and those who had term delivery. These findings were similar for those who had PTB at < 34 and < 37 weeks' gestation.ConclusionWomen who had iatrogenic PTB, but not those who had spontaneous PTB, have increased SBPAo and arterial stiffness that is apparent from as early as the first trimester of pregnancy. Copyright © 2012 ISUOG. Published by John Wiley & Sons, Ltd.
Compensatory enlargement of a solitary functioning kidney during fetal development
Authors: van Vuuren S. H. , van der Doef R. , Cohen‐Overbeek T. E. , Goldschmeding R. , Pistorius L. R. , de Jong T. P. V. M. 
Published: May 2012

ABSTRACTObjectiveTo determine the degree of compensatory enlargement, and its time of onset, of the solitary functioning kidney (SFK) in fetuses with unilateral renal agenesis (URA) or unilateral multicystic kidney dysplasia (MCKD).methodsThis was a retrospective study of fetuses with URA or MCKD diagnosed prenatally and confirmed postnatally in the period from January 1999 to May 2011. Fetuses with any other congenital anomalies were excluded. Measurements of kidney length were retrieved from our prenatal ultrasound database and a nomogram was established and compared with that for normal kidney length.resultsIn total, 67 fetuses were identified, 60 with MCKD and seven with URA, for which we obtained 147 kidney length measurements from our database. Mean gestational age at time of measurement was 29.7 (range, 18.4–36.7) weeks. Compensatory enlargement, defined as renal length >95th percentile for gestational age, was demonstrated in 87% of the MCKD cases and 100% of the URA cases (88% of cases overall). We estimated the mean enlargement for an SFK (defined as difference from 50th percentile for normal renal length) at 36 weeks' gestation to be 23.1% (9.25 mm), with the mean value being 11.4% (5.04 mm) greater than the 95th percentile for a normal kidney at this gestational age. Compensatory enlargement of SFKs was evident from the 20th week of gestation onwards.ConclusionCompensatory enlargement of SFKs occurs in almost 90% of fetuses with MCKD or URA, and may be observed from the 20th week of gestation onwards.
Tetranuclear Homo‐ and Heterometallic Manganese(III) and Nickel(II) Complexes: Synthesis, Structure, and Magnetic Studies
Authors: Nayak Sanjit , Novitchi Ghenadie , Muche Simon , Luneau Dominique , Dehnen Stefanie 
Published: May 2012

AbstractThree new polynuclear cluster complexes were synthesized and characterized using single‐crystal X‐ray measurements, infrared spectroscopy, and elemental analyses. A Schiff‐base, 2‐{[(1‐hydroxybutan‐2‐yl)imino]methyl}phenol (himpH2), synthesized in situ from the reaction of salicylaldehyde and (±)‐2‐aminobutanol, was used as ligand. Reactions of the ligand with different MnII and NiII salts led to two homometallic complexes and a heterometallic complex with [MnIII4] (1), [NiII4] (2), and [MnIII2NiII2] (3) cores exhibiting square, cubane‐type, or butterfly arrangement, respectively. Analysis of the temperature dependence of the magnetic susceptibility of compounds 1–3, using appropriate spin Hamiltonians, indicated that the [MnIII4] and [NiII4] compounds show dominant ferromagnetic coupling of the spin carriers, whereas the [Mn2Ni2] compound has antiferromagnetic MnIII–NiII and ferromagnetic NiII–NiII interactions, with a spin ground state St = 2. Analyses of the magnetization data in 0–5 T fields at 2 K indicate the presence of positive zero‐field splitting (ZFS) values, which is consistent with the absence of slow magnetic relaxation.
Learning Curve of Thoracoscopic Repair of Esophageal Atresia
Authors: van der Zee David C. , Tytgat Stefaan H. A. J. , Zwaveling Sander , van Herwaarden Maud Y. A. , Vieira‐Travassos Daisy 
Published: May 2012

AbstractBackgroundThoracoscopic repair of esophageal atresia is considered to be one of the more advanced pediatric surgical procedures, and it undoubtedly has a learning curve. This is a single‐center study that was designed to determine the learning curve of thoracoscopic repair of esophageal atresia.MethodsThe study involved comparison of the first and second five‐year outcomes of thoracoscopic esophageal atresia repair.ResultsThe demographics of the two groups were comparable. There was a remarkable reduction of postoperative leakage or stenosis, and recurrence of fistulae, in spite of the fact that nowadays the procedure is mainly performed by young staff members and fellows.ConclusionsThere is a considerable learning curve for thoracoscopic repair of esophageal atresia. Centers with the ambition to start up a program for thoracoscopic repair of esophageal atresia should do so with the guidance of experienced centers.
Contact-free cold atmospheric plasma treatment of Deinococcus radiodurans
Authors: Maisch Tim , Shimizu Tetsuji , Mitra Anindita , Heinlin Julia , Karrer Sigrid , Li Yang-Fang , Morfill Gregor , Zimmermann Julia L 
Published: May 2012

Abstract
In this study we investigated the sensitivity of Deinococcus radiodurans to contact-free cold atmospheric plasma treatment as part of a project to establish new efficient procedures for disinfection of inanimate surfaces. The Gram-positive D. radiodurans is one of the most resistant microorganisms worldwide. Stationary phases of D. radiodurans were exposed to cold atmospheric plasma for different time intervals or to ultraviolet C (UVC) radiation at dose rates of 0.001–0.0656 J cm−2, respectively. A methicillin-resistant Staphylococcus aureus strain (MRSA) served as control for Gram-positive bacteria. The surface microdischarge plasma technology was used for generation of cold atmospheric plasma. A plasma discharge was ignited using ambient air. Surprisingly, D. radiodurans was sensitive to the cold atmospheric plasma treatment in the same range as the MRSA strain. Survival of both bacteria decreased with increasing plasma exposure times up to 6 log10 cycles (&gt;99.999 %) within 20 s of plasma treatment. In contrast, UVC radiation of both bacteria demonstrated that D. radiodurans was more resistant to UVC treatment than MRSA. Cold atmospheric plasma seems to be a promising tool for industrial and clinical purposes where time-saving is a critical point to achieve efficient disinfection of inanimate surfaces and where protection from corrosive materials is needed.
Problématique des anéjaculations psychogènes au Sénégal : à propos de quatre cas
Authors: Sylla A. , Ndiaye-Ndongo N. -D. , Fall L. , Guèye S. M. , Guèye M. 
Published: May 2012

Résumé
Au Sénégal, les troubles sexuels posent un réel problème de diagnostic et surtout de prise en charge, en rapport avec le manque d’informations des patients, les tabous sexuels et la rareté supposée de ces affections.
Des patients présentant une anéjaculation sans étiologie organique ou iatrogène ont été adressés au service de psychiatrie en consultation de soutien psychologique. Les entretiens réalisés ont permis de déceler des facteurs psychosociaux communs par rapport aux circonstances précédant et entretenant l’anéjaculation psychogène.
Le premier facteur commun est la précocité des relations sexuelles avant la puberté chez tous les patients.
Par ailleurs, nous avons noté la crainte d’un inceste éventuel avec un sentiment de culpabilité, et une certaine valorisation de l’anéjaculation par les partenaires qui pourraient être des facteurs intervenant dans le renforcement du trouble.
La mise à disposition d’un espace d’écoute associé à des réaménagements s’inspirant de l’approche cognitivocomportementale a pu apporter un soulagement aux patients.
A pictorial review of traumatic pericardial injuries
Authors: Adams Ashok , Fotiadis Nicos , Chin Jann Yee , Sapsford Wayne , Brohi Karim 
Published: May 2012

Abstract
Background
Thoracic injuries are the third most common injuries in trauma patients with cardiac injuries amongst the most lethal. Imaging is essential in diagnosis and triage of patients with pericardial injuries, and this review aims to highlight the spectrum of imaging findings of pericardial trauma. Focussed assessment with sonography for trauma (FAST) is the preferred initial examination, being rapid and accurate. Sensitivity of FAST for pericardial fluid detection is high with reported sensitivities of 97–100%. Plain chest radiography has low sensitivity for pericardial injuries but is useful in the evaluation of associated injuries. Computed tomography (CT) is the modality of choice for stable patients and can accurately diagnose traumatic pathology of the pericardium being especially useful in identification of cardiac herniation. The spectrum of CT findings includes pericardial fluid collections, focal pericardial defects and pneumopericardium.

Methods
A selection of cases of pericardial trauma encountered at a level one trauma centre is presented. Operative findings were correlated with the FAST scan, plain radiography and computed tomography imaging.

Conclusion
The imaging findings of pericardial trauma with various imaging modalities (ultrasound, plain radiography and computed tomography) are presented in order to aid interpretation during the acute trauma setting.
Interstate Migration Has Fallen Less Than You Think: Consequences of Hot Deck Imputation in the Current Population Survey
Authors: Kaplan Greg , Schulhofer-Wohl Sam 
Published: May 2012

Abstract
We show that much of the recent reported decrease in interstate migration is a statistical artifact. Before 2006, the Census Bureau’s imputation procedure for dealing with missing data in the Current Population Survey inflated the estimated interstate migration rate. An undocumented change in the procedure corrected the problem starting in 2006, thus reducing the estimated migration rate. The change in imputation procedures explains 90% of the reported decrease in interstate migration between 2005 and 2006, and 42% of the decrease between 2000 (the recent high-water mark) and 2010. After we remove the effect of the change in procedures, we find that the annual interstate migration rate follows a smooth downward trend from 1996 to 2010. Contrary to popular belief, the 2007–2009 recession is not associated with any additional decrease in interstate migration relative to trend.
Single nucleotide polymorphism barcoding to evaluate oral cancer risk using odds ratio‐based genetic algorithms
Authors: Yang Cheng‐Hong , Chuang Li‐Yeh , Cheng Yu‐Huei , Lin Yu‐Da , Wang Chun‐Lin , Wen Cheng‐Hao , Chang Hsueh‐Wei 
Published: May 2012

AbstractCancers often involve the synergistic effects of gene–gene interactions, but identifying these interactions remains challenging. Here, we present an odds ratio‐based genetic algorithm (OR‐GA) that is able to solve the problems associated with the simultaneous analysis of multiple independent single nucleotide polymorphisms (SNPs) that are associated with oral cancer. The SNP interactions between four SNPs—namely rs1799782, rs2040639, rs861539, rs2075685, and belonging to four genes (XRCC1, XRCC2, XRCC3, and XRCC4)—were tested in this study, respectively. The GA decomposes the SNPs sets into different SNP combinations with their corresponding genotypes (called SNP barcodes). The GA can effectively identify a specific SNP barcode that has an optimized fitness value and uses this to calculate the difference between the case and control groups. The SNP barcodes with a low fitness value are naturally removed from the population. Using two to four SNPs, the best SNP barcodes with maximum differences in occurrence between the case and control groups were generated by GA algorithm. Subsequently, the OR provides a quantitative measure of the multiple SNP synergies between the oral cancer and control groups by calculating the risk related to the best SNP barcodes and others. When these were compared to their corresponding non‐SNP barcodes, the estimated ORs for oral cancer were found to be great than 1 [approx. 1.72–2.23; confidence intervals (CIs): 0.94–5.30, p < 0.03–0.07] for various specific SNP barcodes with two to four SNPs. In conclusion, the proposed OR‐GA method successfully generates SNP barcodes, which allow oral cancer risk to be evaluated and in the process the OR‐GA method identifies possible SNP–SNP interactions.
Towards a transnational industrial-hazard history: charting the circulation of workplace dangers, debates and expertise
Authors: SELLERS CHRISTOPHER , MELLING JOSEPH 
Published: May 2012

AbstractWe argue that industrial hazards have remained an integral feature of the international and ‘global’ economy since the early modern period, and invite historians of science into the study of their history. The growth and dissemination of knowledge about these hazards, as well as the production and trade that generate them, continue to generate deep inequalities in just who is exposed to them, as illustrated by the shifting impact of the asbestos-related disease plague in the past half-century. Exposure levels in poorer countries have risen as those in affluent societies have fallen, the latter due as much to popular protest and media exposure as to scientific expertise. We suggest that the best way to understand the formation of knowledge about these hazards is not to return to the epistemological battlegrounds of the ‘science wars’ of the 1990s but to seek more interdisciplinary integration of the multifaceted ways that material bodies, environments and interests contribute to an understanding of such hazards and injuries. We propose the framework of ‘industrial-hazard regimes’ as an avenue into the ways in which knowledge about risks and dangers at work are created, translated and contested in different countries and times. While urging a return, in some respects, to the early models of ‘progressive enlightenment’ devised by radical commentators and pioneering historians of the industrial hazard in the early twentieth century, we would revise these early approaches, and also offer some sceptical commentary on the difficulties raised, more recently, by narratives of ‘heroic populism’ or ‘anti-science epidemiology’. The critical standpoints for which we argue recognize the diverse social and political identities and loyalties not only of past contributors to the controversies on industrial hazard, but also of historians of science and medicine themselves.