bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bestimmung der Knicklängen von vier ausgewählten Systemen für die praktische Anwendung mit Tabellenkalkulationsprogrammen
Authors: Strehl Ch. , Roth M. , Strehl G. 
Published: March 2013

AbstractFür die Stabilitätsnachweise von Tragwerken nach dem Ersatzstabverfahren werden die Knicklängen der Stäbe benötigt. Die exakte Bestimmung der Knicklängen ist auch für einfache Systeme mit einem erheblichen Rechenaufwand verbunden. Auf der Basis von Tabellenkalkulationsprogrammen (z.B. MS‐Excel) werden für vier charakteristische Tragsysteme die Eigenwertmatrizen erstellt. Ziel dieser Aufbereitung ist, Näherungslösungen und Abschätzungen von Knicklängen entbehrlich zu machen.
Synthesis, Structure, and Catalytic Behavior of Ytterbium Complexes Derived from a Linked Bis(β‐ketoiminato) Ligand
Authors: Fan Lingling , Wang Yaorong , Yao Yingming , Wu Bing , Shen Qi 
Published: March 2013

AbstractYtterbium complexes supported by a linked bis(β‐ketoiminato) ligand,N,N′‐ethylenebis(benzoylacetoimine) (H2L), were synthesized and their catalytic behavior was explored. The reaction of YbCl3with 1 equiv. of LLi2afforded the mononuclear ytterbium chloride LYbCl(THF)2(1) in high yield. Complex1can be used as starting material to prepare β‐ketoiminate‐ytterbium derivatives. Treatment of complex1with NaN(SiMe3)2produced the dimeric ytterbium amide {LYb[N(SiMe3)2]}2(2), while the similar reaction of complex1with NaOAr (ArO = 2, 6‐tBu‐4‐MeC6H2O) led to the mononuclear ytterbium aryloxide LYbOAr(THF) (3). The three complexes were well detected by elemental analysis and single‐crystal X‐ray analysis. It was found that complexes2and3can initiate the ring‐opening polymerization of ϵ‐caprolactone with moderate activity.
Searching for Vanadium‐Based Prospective Agents against Trypanosoma cruzi: Oxidovanadium(IV) Compounds with Phenanthroline Derivatives as Ligands
Authors: Benítez Julio , Correia Isabel , Becco Lorena , Fernández Mariana , Garat Beatriz , Gallardo Hugo , Conte Gilmar , Kuznetsov Maxim L. , Neves Ademir , Moreno Virtudes , Costa Pessoa João , Gambino Dinorah 
Published: March 2013

AbstractSearching for new promising metal‐based drugs for the treatment of parasitic diseases against Trypanosoma cruzi, three related oxidovanadium(IV) complexes, [VIVO(SO4)(H2O)2(NN)], with the phenanthroline derivatives (NN) 1,2,5thiadiazolo[3,4‐f]1,10phenanthroline (tdzp), 1,10‐phenanthroline‐5, 6‐dione (phendione), and 5,6‐epoxy‐5,6‐dihydro‐1,10‐phenanthroline (epoxyphen) are synthesized, characterized, and evaluated in vitro as anti‐T. cruzi agents. The compounds are characterized in the solid state and in solution by elemental analysis, electrospray ionization mass spectrometry (ESI‐MS), conductimetric measurements, and infrared (FTIR), UV/Vis, and electronic paramagnetic resonance (EPR) spectroscopy. EPR spectroscopy suggests that the ligands act as bidentate, binding through both nitrogen donor atoms in an axial‐equatorial mode. DFT calculations corroborate the structural assignments. The stability of the complexes in solution is evaluated by EPR and 51V‐ NMR spectroscopy and all complexes show reasonable stability. The anti‐T. cruzi activity of the complexes was tested by measuring the growth inhibitory effect on the epimastigote life cycle form of the parasite (Dm28c strain). All complexes show IC50 values in the micromolar range against T. cruzi and display activities of the same order of that of Nifurtimox, but lower than that of the previously reported analogue [VIVO(SO4)(H2O)2(dppz)] (dppz = dipyrido[3, 2‐a:2′,3′‐c]phenazine). Furthermore, DNA was evaluated as a potential target by using atomic force microscopy (AFM), showing that the complexes display ability to interact with this biomolecule.
Lipocalin‐2 is Associated With a Good Prognosis and Reversing Epithelial‐to‐Mesenchymal Transition in Pancreatic Cancer
Authors: Xu Bin , Jin Da‐Yong , Lou Wen‐Hui , Wang Dan‐Song 
Published: March 2013

AbstractBackgroundLipocalin‐2 is a multifaceted modulator in cancer progression. Its clinical significance is not clear in pancreatic cancer. The purpose of this study was to investigate whether lipocalin‐2 is associated with good prognosis by reversing epithelial‐to‐mesenchymal transition (EMT) in pancreatic cancer.MethodsLipocalin‐2, E‐cadherin, or vimentin expression was detected in 60 pancreatic adenocarcinoma specimens. Correlations between lipocalin‐2 expression and EMT, the clinicopathologic characteristics, and prognosis were investigated. Whether pancreatic cancer cells’ migration and invasion (some characteristics of EMT) were affected by lipocalin‐2 was also explored.ResultsHigh lipocalin‐2 expression was significantly associated with a good prognosis in pancreatic cancer (p < 0.05). Overexpression of lipocalin‐2 correlated with a lower extent of EMT (p < 0.05), increased E‐cadherin expression (p < 0.05), decreased vimentin expression (p < 0.05), and reduced cancer cell migration and invasion in pancreatic cancer.ConclusionsLipocalin‐2 may be considered an epithelial inducer, which may reverse EMT and predict a good prognosis in pancreatic cancer.
Nano-mechanical mapping of the interactions between surface-bound RC-LH1-PufX core complexes and cytochrome c
2 attached to an AFM probe
Authors: Vasilev Cvetelin , Brindley Amanda A. , Olsen John D. , Saer Rafael G. , Beatty J. T. , Hunter C. N. 
Published: March 2013

Abstract
Electron transfer pathways in photosynthesis involve interactions between membrane-bound complexes such as reaction centres with an extrinsic partner. In this study, the biological specificity of electron transfer between the reaction centre-light-harvesting 1-PufX complex and its extrinsic electron donor, cytochrome c
2, formed the basis for mapping the location of surface-attached RC-LH1-PufX complexes using atomic force microscopy (AFM). This nano-mechanical mapping method used an AFM probe functionalised with cyt c
2 molecules to quantify the interaction forces involved, at the single-molecule level under native conditions. With surface-bound RC-His12-LH1-PufX complexes in the photo-oxidised state, the mean interaction force with cyt c
2 is approximately 480 pN with an interaction frequency of around 66 %. The latter value lowered 5.5-fold when chemically reduced RC-His12-LH1-PufX complexes are imaged in the dark to abolish electron transfer from cyt c
2 to the RC. The correspondence between topographic and adhesion images recorded over the same area of the sample shows that affinity-based AFM methods are a useful tool when topology alone is insufficient for spatially locating proteins at the surface of photosynthetic membranes.
Beta diversity reconsidered
Authors: Bacaro Giovanni , Gioria Margherita , Ricotta Carlo 
Published: March 2013

AbstractA simple analytical procedure to test for differences in beta diversity among sets of plots has been recently presented. Here, we describe an improved randomization procedure that replaces the one previously proposed. This procedure consists of shuffling within‐group dissimilarities among groups and disregarding between‐group dissimilarities. By repeating this operation many times, a distribution of the test statistics under the null hypothesis of no differences in the mean plot‐to‐plot dissimilarities within groups is obtained. This procedure ensures that the correct null model is selected. To describe this new procedure, we used plant and water beetle (Coleoptera) data collected from 45 permanent ponds. Beta diversity was compared between plant and water beetle (Coleoptera) assemblages.
Opening a donor's wallet: The influence of appeal scales on likelihood and magnitude of donation
Authors: De Bruyn Arnaud , Prokopec Sonja 
Published: March 2013

AbstractWe examine the influence of appeal scales on the likelihood and magnitude of donation in a large field experiment. We argue and show that the leftmost anchor on the appeal scale most strongly influences the likelihood of donating; the lower the anchor, the higher the donation likelihood. Furthermore, our findings indicate that increasing the steepness of the amounts on the appeal scale increases the magnitude of donations. Both effects are stronger for infrequent than for frequent donors. Our results demonstrate that by using what a charity knows about past donor behavior, it can alter appeal scales to change donation behavior.
Electrodiagnostics and Clinical Correlates in Acquired Polyneuropathies
Authors: Karvelas Kristopher , Rydberg Leslie , Oswald Matthew 
Published: March 2013

AbstractPeripheral neuropathies result from a variety of inherited and acquired pathologies. They display an assortment of clinical signs and symptoms and present with a broad range of severity. Electrodiagnosis can play a key role in the evaluation of a suspected peripheral neuropathy. A peripheral nerve disorder is first suspected on the basis of history and physical examination findings. Electrodiagnosis is then used to confirm the diagnosis and to characterize the peripheral neuropathy, providing information about its distribution, pathophysiologic process (demyelinating vs axonal), and chronicity.
ON PERMUTATION BINOMIALS OVER FINITE FIELDS
Authors: AYAD MOHAMED , BELGHABA KACEM , KIHEL OMAR 
Published: March 2013

AbstractLet ${ \mathbb{F} }_{q} $ be the finite field of characteristic $p$ containing $q= {p}^{r} $ elements and $f(x)= a{x}^{n} + {x}^{m} $, a binomial with coefficients in this field. If some conditions on the greatest common divisor of $n- m$ and $q- 1$ are satisfied then this polynomial does not permute the elements of the field. We prove in particular that if $f(x)= a{x}^{n} + {x}^{m} $ permutes ${ \mathbb{F} }_{p} $, where $n\gt m\gt 0$ and $a\in { \mathbb{F} }_{p}^{\ast } $, then $p- 1\leq (d- 1)d$, where $d= \gcd (n- m, p- 1)$, and that this bound of $p$, in terms of $d$ only, is sharp. We show as well how to obtain in certain cases a permutation binomial over a subfield of ${ \mathbb{F} }_{q} $ from a permutation binomial over ${ \mathbb{F} }_{q} $.
Rice protein ameliorates the progression of diabetic nephropathy in Goto–Kakizaki rats with high-sucrose feeding
Authors: Kubota Masatoshi , Watanabe Reiko , Kabasawa Hideyuki , Iino Noriaki , Saito Akihiko , Kumagai Takehisa , Fujimura Shinobu , Kadowaki Motoni 
Published: March 2013

The effect of rice protein (RP) on diabetic nephropathy in non-obese, spontaneous type 2 diabetic Goto–Kakizaki (GK) rats was investigated. GK rats at 7 weeks of age were fed 20 % RP or casein (C) in standard or high-sucrose diets for 10 weeks. Plasma total cholesterol, TAG, alkaline phosphatase (ALP), adiponectin, creatinine and urinary albumin excretion (UAE) were measured and renal histology was evaluated. Compared with C, RP lowered plasma TAG and improved plasma adiponectin levels in GK rats fed the standard diet (P< 0·05), and also lowered total cholesterol and ALP in high-sucrose-fed GK rats (P< 0·05). RP markedly suppressed the sharp increase in UAE when GK rats were fed high-sucrose diets (P< 0·05), and prevented glomerular mesangial matrix expansion in the deep renal cortex near the corticomedullary junction (P< 0·05). These results strongly indicate that dietary RP can ameliorate the progression of diabetic nephropathy at an early stage compared with C.
A microbiologically clean strategy for access to the Whillans Ice Stream subglacial environment
Authors: Priscu John C. , Achberger Amanda M. , Cahoon Joel E. , Christner Brent C. , Edwards Robert L. , Jones Warren L. , Michaud Alexander B. , Siegfried Matthew R. , Skidmore Mark L. , Spigel Robert H. , Switzer Gregg W. , Tulaczyk Slawek , Vick-Majors Trista J. 
Published: March 2013

AbstractThe Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) project will test the overarching hypothesis that an active hydrological system exists beneath a West Antarctic ice stream that exerts a major control on ice dynamics, and the metabolic and phylogenetic diversity of the microbial community in subglacial water and sediment. WISSARD will explore Subglacial Lake Whillans (SLW, unofficial name) and its outflow toward the grounding line where it is thought to enter the Ross Ice Shelf seawater cavity. Introducing microbial contamination to the subglacial environment during drilling operations could compromise environmental stewardship and the science objectives of the project, consequently we developed a set of tools and procedures to directly address these issues. WISSARD hot water drilling efforts will include a custom water treatment system designed to remove micron and sub-micron sized particles (biotic and abiotic), irradiate the drilling water with germicidal ultraviolet (UV) radiation, and pasteurize the water to reduce the viability of persisting microbial contamination. Our clean access protocols also include methods to reduce microbial contamination on the surfaces of cables/hoses and down-borehole equipment using germicidal UV exposure and chemical disinfection. This paper presents experimental data showing that our protocols will meet expectations established by international agreement between participating Antarctic nations.
One-year records from automatic snow stations in western Dronning Maud Land, Antarctica
Authors: Järvinen Onni , Leppäranta Matti , Vehviläinen Juho 
Published: March 2013

AbstractTwo automatic snow stations were deployed for one year (from December 2009–January 2011) in western Dronning Maud Land. The purposes of the experiment were: 1) to build a working snow station to measure the snow surface layer temperature, and 2) to use the data for snow heat and mass balance investigations. The data collection was successful and lasted about 400 days (9 December 2009–21 January 2011). The annual net snow accumulation at snow station 2 (continental ice sheet) was 86 cm (345 mm water equivalent) and at snow station 1 (ice shelf) more than 150 cm. The power spectra revealed daily cycle, synoptic scale variability, and variability in a low-frequency band of 60–120 days at a depth of 54 cm. The snow-air heat flux was estimated from the data, resulting in negative values (from snow to air) during autumn and winter and positive values (from air to snow) in spring and summer. The physical characterization of snow stratigraphy was done during installation and retrieval of the snow stations, including density, hardness (hand test), stratigraphy, and grain size and shape.
Population status of the Madagascar Fish EagleHaliaeetus vociferoidesin 2005–2006
Authors: RAZAFIMANJATO GILBERT , SAM THE SEING , RAKOTONDRATSIMA MARIUS , RENE DE ROLAND LILY-ARISON , THORSTROM RUSSELL 
Published: March 2013

SummaryCoastal and inland surveys for the endemic and “Critically Endangered” Madagascar Fish EagleHaliaeetus vociferoideswere conducted in western Madagascar from Antsiranana in the north to Manja in the south during the 2005 and 2006 breeding seasons (May–October). Surveys covered typical Madagascar Fish Eagle habitat: lakes, rivers, mangroves, estuaries, and marine islands within their known distribution. In total, 287 individuals were encountered, including 98 breeding pairs (196 individuals), 23 breeding trios (69 individuals), 15 single adults and seven immature birds. Of these 287 birds, 128 individuals (44.6%) were observed on lakes; 116 (40.4%) in coastal areas, consisting of 103 (35.9%) in mangroves and 13 (4.5%) in estuaries; 32 (11.2%) on marine islands and 11 (3.8%) on rivers. There was an increase between surveys in 1995 and this study in the number of Madagascar Fish Eagles counted, from 222 to 287, and in the number of pairs from 99 to 121. This study confirms that the Madagascar Fish Eagle population is still low due to human persecution (hunting, collection of eggs and nestlings), overfishing and habitat destruction. We recommend monitoring fish eagles annually at the higher concentration sites to evaluate human activities and conducting a population survey every five years throughout western and northern Madagascar.
Serving Limited English Proficient Callers: A Survey of 9-1-1 Police Telecommunicators
Authors: Carroll Lauren N. , Calhoun Rebecca E. , Subido Cleo C. , Painter Ian S. , Meischke Hendrika W. 
Published: March 2013

AbstractIntroductionThe emergency telephone number 9-1-1 serves as a lifeline to the public during emergencies, and first responders rely on information gathered by 9-1-1 telecommunicators who speak with callers. Timely, accurate information from the telecommunicators is essential for providing appropriate care on scene. Language barriers can hamper these efforts and result in less efficient information exchange. Although 9-1-1 telecommunicators may access over-the-phone interpreter (OPI) services to facilitate communication, managing three-way communication during an emergency is challenging.ProblemThere is little published on the relationship between limited English proficient (LEP) callers and 9-1-1 police telecommunicators, and the role of OPI services during these calls. Further, little is known about effective strategies to manage such calls.MethodsIn King County, Washington, 9-1-1 police telecommunicators were surveyed about their experiences handling LEP calls and managing three-way communication with OPI services. The survey contained 13 multiple-choice and three open-response questions addressing communication strategies, challenges with LEP callers, and three-way communication with OPI services. Goodman-Kruskal Gamma and chi-square tests were conducted with OPI use as the dependent variable. Additional analyses were conducted using stress levels as the dependent variable.ResultsOf 123 respondents, 69 (56.5%) 9-1-1 telecommunicators reported utilizing OPI services at least 75% of the time when receiving a call from an LEP caller. Further, 35 (28.7%) of these telecommunicators reported calls with LEP individuals as more stressful than calls with fluent English speakers. Dispatcher stress level during LEP calls compared with stress during calls with fluent English speakers was positively associated with use of OPI services (P < .01). Further, stress level was also positively associated with telecommunicator difficulties in assessing the situation with respect to officer safety (P < .01). Sixty-three (58.3%) of the telecommunicators described difficulties assessing the situation to determine the appropriate response as the biggest challenge with LEP callers. Additionally, 62 (53%) identified knowing their location in English as information LEP callers need to know prior to calling 9-1-1.ConclusionThese results highlight intervention opportunities for both 9-1-1 telecommunicators and LEP communities. Together, interventions such as working with LEP communities to educate them on best communication practices during 9-1-1 calls, and with 9-1-1 telecommunicators to help them manage three-way communication and reduce stress associated with concern for officer safety may improve emergency communication during 9-1-1 calls.CarrollLN, CalhounRE, SubidoCC, PainterIS, MeischkeHW. Serving limited English proficient callers: a survey of 9-1-1 police telecommunicators. Prehosp Disaster Med. 2013;28(3):1-6.
Publishing as a Graduate Student: A Quick and (Hopefully) Painless Guide to Establishing Yourself as a Scholar
Authors: Rich Timothy S. 
Published: March 2013

AbstractGraduate students seldom know how to navigate the publishing process, yet a growing expectation is that new hires are capable of immediately producing publishable research as well as teaching. Considering the current state of the job market, graduate students should plan early to take advantage of the opportunities to publish early in their graduate career. This article provides suggestions for beginning the publishing process.
Expectant and Nursing Academics: The Interview Experience of Moms in Political Science
Authors: Lewis Angela K. 
Published: March 2013

AbstractThe challenges that women in academia face are well documented. However, there is a dearth of research on the experiences of female academics particularly on job interviews as expectant or nursing mothers. This study sought to document the experiences of these women. Considering the grueling nature of the academic job interview, do expectant or nursing mothers ask for accommodations on the interview, and if so, how do departments respond to their request? We find that women refrain from job interviews as expectant mothers while others suggest using the “hidden pregnancy phenomenon.” Nursing mothers had more positive experiences, although experiences were less than desirable. Based on the findings, we offer a list of recommendations to departments to help improve this critical step in starting a career in academe.
Chapters, Volumes, Editors! Oh My! Reassessing the Role of Edited Volumes in the Social Sciences
Authors: Leal David L. 
Published: March 2013

AbstractMany scholars discount the value of edited volumes and book chapters to the social science enterprise. Nevertheless, these unique formats advance scholarship, help faculty and graduate students achieve their goals, and enhance teaching and learning. This article therefore assesses the criticisms of volumes and chapters, reconsiders the contributions of these publications, and makes recommendations for improving their accessibility and status.
Predicting percentage body fat through waist-to-height ratio (WtHR) in Spanish schoolchildren
Authors: Marrodán MD , Álvarez JR Martínez , de Espinosa M González-Montero , Carmenate MM , López-Ejeda N , Cabañas MD , Pacheco JL , Mesa MS , Romero-Collazos JF , Prado C , Villarino A 
Published: March 2013

AbstractObjectiveTo analyse the association between waist-to-height ratio (WtHR) and body fat and to develop predictive adiposity equations that will simplify the diagnosis of obesity in the paediatric age group.DesignCross-sectional study conducted in Spain during 2007 and 2008. Anthropometric dimensions were taken according to the International Biology Program. The children were classified as underweight, normal weight, overweight or obese according to national standards of percentage body fat (%BF). WtHR differences among nutritional status categories were evaluated using ANOVA. Correlation analysis and regression analysis were carried out using WtHR as a predictor variable for %BF. A t test was applied to the results obtained by the regression model and by the Siri equation. The degree of agreement between both methods was evaluated by estimating the intra-class correlation coefficient.SettingElementary and secondary schools in Madrid (Spain).SubjectsGirls (n 1158) and boys (n 1161) from 6 to 14 years old.ResultsWtHR differed significantly (P < 0·001) depending on nutritional status category. This index was correlated (P < 0·001) with all adiposity indicators. The mean %BF values estimated by the regression model (boys: %BF = 106·50 × WtHR – 28·36; girls: %BF = 89·73 × WtHR – 15·40) did not differ from those obtained by the Siri equation. The intra-class correlation coefficient (0·85 in boys, 0·79 in girls) showed a high degree of concordance between both methods.ConclusionsWtHR proved to be an effective method for predicting relative adiposity in 6–14-year-olds. The developed equations can help to simplify the diagnosis of obesity in schoolchildren.
Effects of scheme default insurance on decisions and financial outcomes in defined benefit pension schemes
Authors: Butt Adam 
Published: March 2013

AbstractA simulation investigation of the effect of default insurance on the optimal equity allocation and deficit spread period of a model defined benefit pension scheme is performed, using the old and new frameworks of the Pension Protection Fund in the U.K. as a starting point. The old default insurance levy framework encourages an increase in the allocation to equities, creating an indirect effect of increased deficits. The new framework reverses the effect to a reduction in the allocation to equities, thus reducing deficits. In addition the gaming element of default insurance is investigated and found to significantly increase optimal equity allocation and deficit spread period, leading to a significant increase in deficits.