bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sequential Development among Dimensions of Job Burnout and Engagement among IT Employees
Authors: Gan Tingting , Gan Yiqun 
Published: July 2013

AbstractThe current study examined the sequential development of job burnout and job engagement and their related antecedents (job demands, job resources and personality) using a three‐wave longitudinal design. We collected usable responses from 160 Information Technology employees in China. Using M‐plus 5.0, we compared four models: the exhaustion–cynicism–inefficacy model of burnout and the vigour–dedication–absorption model of engagement, the exhaustion–cynicism–inefficacy model of burnout and the dedication–absorption–vigour model of engagement, the cynicism–inefficacy–exhaustion model of burnout and the dedication–absorption–vigour model of engagement and the cynicism–inefficacy–exhaustion model of burnout and the vigour–dedication– absorption model of engagement. The results of the model comparisons revealed that the last model had the best fit with the data. In addition, we found that job demands, job resources and personality influenced burnout and engagement in different ways. The results showed that the pathways from job demands/job resources to burnout/engagement were robust and direct, whereas personality had both a direct influence and an indirect influence (through job demands/resources) on burnout/engagement. Copyright © 2013 John Wiley & Sons, Ltd.
Der eiserne Dachstuhl der Walhalla – ein herausragendes Zeugnis des frühen Stahlbaus
Authors: Veihelmann Karen 
Published: July 2013

AbstractHoch über der Donau erhebt sich die Walhalla bei Regensburg. Auf den ersten Blick ein klassizistischer, dorischer Peripteros, erschließt sich dem Bauingenieur erst bei näherem Hinsehen ein herausragendes Beispiel des frühen Stahlbaus: Der komplexe eiserne Dachstuhl ist in seiner Feingliedrigkeit und in seinen Details eines der sehr selten gewordenen, heute noch erhaltenen Zeugnisse aus einer Zeit, da sich der damals neue Werkstoff erst etablieren sollte. Der folgende Artikel beleuchtet den historischen Kontext des Prestigebaus und zeichnet ein Bild des Konstrukteurs Johann Michael Mannhardt. Anhand bei Untersuchungen des Dachstuhls aufgenommener Befunde werden danach Abläufe während Fertigung und Montage rekonstruiert.The iron roof truss of the Valhalla – an outstanding testimonial of early steelworks. High above the Danube River soars the Valhalla near Regensburg. At first glance a neo‐classical peripteros, the Valhalla is on closer inspection an outstanding example of early steel construction, as revealed by the civil engineer. The complex iron roof truss is in both intricacy and detail one of the very rare, still preserved examples of a time when new material should have been established. The following paper examines the historical context of this prestigious building and presents a portrait of the engineer Johann Michael Mannhardt. Based upon on‐site findings, the processes during manufacturing and assembling will then be reconstructed.
Wirtschaftliche Verbundbauweisen im Brückenbau – Bauweisen mit Verbunddübelleisten
Authors: Seidl Günter , Stambuk Mislav , Lorenc Wojciech , Kołakowski Tomasz , Petzek Edward 
Published: July 2013

AbstractVerbunddübelleisten bieten im Brückenbau ein breites Einsatzspektrum. Sie sind einfach herzustellen und stellen bei der Übertragung der Schubkräfte in der Verbundfuge eine dauerhafte und robuste Lösung dar. Aus der neuartigen Wirkungsweise ergeben sich neue Konstruktionen im Verbundbrückenbau. Der Aufsatz gibt einen Überblick über Konstruktion und Wirtschaftlichkeit ausgeführter Bauwerke mit Verbunddübelleisten.Economic composite constructions for bridges ‐ Construction methods implementing composite dowel strips. Composite dowel strips find a wide range of application in bridges. They are easy to manufacture and the transmission of shear forces of the composite action is long lasting and robust. Beside the innovative composite action new construction methods for composite bridges are established. The article summarizes already executed bridge structures implementing composite dowel strips due to construction details and economic aspects.
IGF-1-mediated osteoblastic niche expansion enhances long-term hematopoietic stem cell engraftment after murine bone marrow transplantation
Authors: Caselli Anna , Olson Timothy S. , Otsuru Satoru , Chen Xiaohua , Hofmann Ted J. , Nah Hyun-Duck , Grisendi Giulia , Paolucci Paolo , Dominici Massimo , Horwitz Edwin M. 
Published: July 2013

Abstract
The efficiency of hematopoietic stem cell (HSC) engraftment after bone marrow (BM) transplantation depends largely on the capacity of the marrow microenvironment to accept the transplanted cells. While radioablation of BM damages osteoblastic stem cell niches, little is known about their restoration and mechanisms governing their receptivity to engraft transplanted HSCs. We previously reported rapid restoration and profound expansion of the marrow endosteal microenvironment in response to marrow radioablation. Here, we show that this reorganization represents proliferation of mature endosteal osteoblasts which seem to arise from a small subset of high-proliferative, relatively radio-resistant endosteal cells. Multiple layers of osteoblasts form along the endosteal surface within 48 hours after total body irradiation, concomitant with a peak in marrow cytokine expression. This niche reorganization fosters homing of the transplanted hematopoietic cells to the host marrow space and engraftment of long-term-HSC. Inhibition of insulin-like growth factor (IGF)-1-receptor tyrosine kinase signaling abrogates endosteal osteoblast proliferation and donor HSC engraftment, suggesting that the cytokine IGF-1 is a crucial mediator of endosteal niche reorganization and consequently donor HSC engraftment. Further understanding of this novel mechanism of IGF-1-dependent osteoblastic niche expansion and HSC engraftment may yield clinical applications for improving engraftment efficiency after clinical HSC transplantation.
Aberrant splicing in neurological diseases
Authors: Feng Dairong , Xie Jiuyong 
Published: July 2013

Splicing of precursor messenger RNA (pre‐mRNA) removes the intervening sequences (introns) and joins the expressed regions (exons) in the nucleus, before an intron‐containing eukaryotic mRNA transcript can be exported and translated into proteins in the cytoplasm. While some sequences are always included or excluded (constitutive splicing), others can be selectively used (alternative splicing) in this process. Particularly by alternative splicing, up to tens of thousands of variant transcripts can be produced from a single gene, which contributes greatly to the proteomic diversity for such complex cellular functions as ‘wiring’ neurons in the nervous system. Disruption of this process leads to aberrant splicing, which accounts for the defects of up to 50% of mutations that cause certain human genetic diseases. In this review, we describe the different mechanisms of aberrant splicing that cause or have been associated with neurological diseases. WIREs RNA 2013, 4:631–649. doi: 10.1002/wrna.1184This article is categorized under:

RNA Processing > Splicing Regulation/Alternative Splicing
RNA in Disease and Development > RNA in Disease
RNA in Disease and Development > RNA in Development
Hydrothermal Synthesis of Two Zinc Coordination Polymers with 1‐(1H‐Tetrazol‐5‐ylmethyl)‐1H‐benzotriazole Ligands
Authors: Sun Su‐Wen , Jin Lei , Shi Ping‐Ping , Liu Ming‐Liang , Kong Li‐Hui , Ye Qiong 
Published: July 2013

AbstractThe direct reaction of ZnBr2 with H‐1‐mbtz [1‐mbtz = 1‐(1H‐tetrazol‐5‐ylmethyl)‐1H‐benzotriazole] gives the two‐dimensional complex [Zn(Br)(1‐mbtz)] (1), whereas the reaction of benzotriazol‐1‐yl‐acetonitrile with NaN3 in the presence of water and a Lewis acid (ZnBr2) affords the 2D coordination polymer [Zn2(OH)(1‐mbtz)3H2O] (2). The central zinc atom in 1 is bonded to one terminal bromine atom and three different nitrogen atoms from two tetrazole ligands and one BTA group (BTA = benzotriazole), and each 1‐mbtz ligand is coordinated to three zinc atoms forming a 2D framework. The coordination polyhedron around the metal atom in 2 is a slightly distorted trigonal bipyramid made up by one zinc atom, four nitrogen atoms as well as one oxygen atom, two of the 1‐mbtz ligands coordinated to three zinc atoms and the third 1‐mbtz ligand acts in a bidentate fashion, which leads to the formation of a complicated 2D network. The syntheses and solid‐state structures of the two coordination polymers are reported.
[Ti8O10(OOCR)12] [R = CH(CH3)2 and CCl3] Carboxylate Titanium Oxo‐Clusters: Potential SBUs for the Synthesis of Metal‐Organic Frameworks
Authors: Frot Théo , Marrot Jérôme , Sanchez Clément , Rozes Laurence , Sassoye Capucine 
Published: July 2013

AbstractThe synthesis and the characterization of a new octanuclear carboxylated titanium oxo‐cluster [Ti8O10(OOCR)12] [R = CH(CH3)2 and CCl3] is reported. The structure was characterized by single‐crystal X‐ray diffraction. It consists in four vertices‐linked pairs of edge‐sharing TiO6 octahedra, presenting μ2 and μ3 oxygen atoms. 17O and 13C liquid state NMR was performed with results in full accordance with the structure determined by X‐ray diffraction. During synthesis, solvothermal conditions and a large excess of carboxylic acid allow to remove all alkoxo ligands of the titanium alkoxide precursor and lead to stable purely carboxylate clusters. This family of clusters can therefore be considered as interesting SBUs to elaborate new metal‐organic frameworks.
Synthesis and Characterization of New 2D Coordination Polymers based on Mn(NCS)2 and Ni(NCS)2 with 1, 2‐Bis(4‐pyridyl)‐ethane as Co‐Ligand
Authors: Wöhlert Susanne , Fink Lothar , Schmidt Martin U. , Näther Christian 
Published: July 2013

AbstractReaction of manganese(II) and nickel(II) thiocyanate with 1, 2‐bis(4‐pyridyl)‐ethane (bpa) leads to the formation of literature known compounds of composition M(NCS)2(bpa)2 with M = Mn (1‐Mn) and Ni (1‐Ni). On heating 1‐Mn and 1‐Ni transform into new compounds of composition M(NCS)2(bpa) with M = Mn (2‐Mn) and Ni (2‐Ni). These compounds can also be prepared in solution. In both synthetic routes only microcrystalline powders are obtained with crystals too small for single‐crystal X‐ray diffraction. Therefore, the structures of both compounds were solved and refined from X‐ray powder data. In the crystal structure the transition metal cations are coordinated by two bpa co‐ligands and four thiocyanato anions within slightly distorted octahedra. The metal cations are linked by μ‐1, 3‐bridging thiocyanato anions into chains, that are further connected into layers by the bpa ligands. Magnetic measurements on 2‐Ni shows only Curie‐Weiss paramagnetism. In contrast, for 2‐Mn an antiferromagnetic ordering is observed but on further cooling the susceptibility curves increase indicating for canted antiferromagnetism. Further measurements prove that the increase at lower temperatures can be traced back to a small contamination with 1‐Mn, which is always present independent if this compound is prepared by thermal decomposition or by crystallization from solution. In the course of the crystallization experiments a few single crystals of two additional compounds of composition Mn(NCS)2(bpa)(H2O)2 (3‐Mn) and [Mn(NCS)2]2(bpa)3(CH3OH)2 (4‐Mn) were accidently obtained and characterized by single crystal structure analysis. The results of the magnetic measurements are compared with those for related compounds with different neutral N‐donor ligands.
Suboptimal event‐triggered control for networked control systems
Authors: Molin A. , Hirche S. 
Published: July 2013

AbstractThe advent of networked control systems urges the digital control design to incorporate communication constraints efficiently. In order to accommodate this requirement, this article studies the joint design of controller and event‐trigger for linear stochastic systems in the presence of a resource‐limited communication channel which exhibits packet dropouts and time‐delay. The event‐trigger situated at the sensor decides at every sampling instance, whether to send information over the communication channel to the controller. The design approach is formulated as a stochastic average‐cost optimization problem, where the communication constraints are reflected as an additional cost penalty of the average transmission rate. Different conditions on the communication model are given where the joint optimal design can be split into a separate control and event‐trigger design. Based on these results, two suboptimal design approaches are developed. By using drift criteria, stability guarantees of the closed‐loop system for both approaches are derived in terms of bounded moment stability. Numerical simulations illustrate the efficacy of the event‐triggered approach compared with optimal time‐triggered controllers.
Nonlinear stability analysis of functionally graded shells using the invariant‐based triangular finite element
Authors: Levyakov S.V. , Kuznetsov V.V. 
Published: July 2013

AbstractThe paper discusses a finite‐element approach for nonlinear analysis of thermal buckling and postbuckling behaviors of plates and shells fabricated of functionally graded materials. The triangular finite‐element is formulated using representation of the strain energy as a function of invariants of the membrane, bending, and transverse shear strains. The invariants are expressed in terms of the strain tensor components determined in the direction of the element edges, which provides some computational benefits. Numerical examples are given to demonstrate the application of the finite element in the investigation of nonlinear deformation and stability of functionally graded plates and shells with temperature dependent properties.
Negative Pressure Induced Cavity Formation During Cocoa Butter Crystallization
Authors: Lencki Robert W. , Craven R. John 
Published: July 2013

AbstractNegative pressure effects appear to play an important role during crystallization of complex TAG mixtures such as cocoa butter. Crystallization conditions influence the final macroscopic sample density and the resulting gaseous phase void structure. Well‐tempered cocoa butter had a relatively smooth surface, higher macroscopic density, and a closed‐pore void structure. In contrast, over‐tempered samples were rougher, less dense, and contained large continuous gas‐filled pores. Under‐tempered cocoa butter had properties between these two treatments, with a continuous, yet very fine pore structure. Since cocoa butter is the continuous phase in chocolate, negative pressure phenomena will likely have a significant influence on chocolate density and thus how it de‐molds during processing.
Eight plate should not be used for treating leg length discrepancy
Authors: Lauge-Pedersen Henrik , Hägglund Gunnar 
Published: July 2013

Purpose The Blount staple has been widely used for treating angular deformities and leg length discrepancy (LLD) of the lower limbs. In recent years, the Eight plate has replaced the Blount staple for treating angular deformities in many centres. Although not described in the literature, it has been proposed that the Eight plate could also be used for treating LLD. We studied the effectiveness of the device for this indication. Methods Ten patients with LLD were included prospectively. Medial and lateral plates were inserted for symmetrical growth reduction and the patients were followed by radiostereometric analysis (RSA) 0, 3, 6, 9, 12, 24, 52 and 80 weeks postoperatively. The error of measurement with this technique is less than 0.05 mm. Results Case 1 continued to grow an average of 0.08 mm per week (6.7 mm longitudinal growth in 1.5 years) postoperatively, while Case 2 showed 0.07 mm longitudinal growth per week (5.6 mm longitudinal growth in 1.5 years). The longitudinal growth, in both children, showed only slight growth retardation throughout the follow-up period. The study was interrupted and no further subjects were included after the results indicated that only minor growth reduction had occurred in both patients. Conclusion The Eight plate does not significantly reduce growth when applied both medially and laterally in a symmetrical way at the proximal tibial physis.
Religiousness and hazardous alcohol use: A conditional indirect effects model
Authors: Jankowski Peter J. , Hardy Sam A. , Zamboanga Byron L. , Ham Lindsay S. 
Published: July 2013

ABSTRACTThe current study examined a conditional indirect effects model of the association between religiousness and adolescents' hazardous alcohol use. In doing so, we responded to the need to include both mediators and moderators, and the need for theoretically informed models when examining religiousness and adolescents' alcohol use. The sample consisted of 383 adolescents, aged 15–18, who completed an online questionnaire. Results of structural equation modeling supported the proposed model. Religiousness was indirectly associated with hazardous alcohol use through both positive alcohol expectancy outcomes and negative alcohol expectancy valuations. Significant moderating effects for alcohol expectancy valuations on the association between alcohol expectancies and alcohol use were also found. The effects for alcohol expectancy valuations confirm valuations as a distinct construct to that of alcohol expectancy outcomes, and offer support for the protective role of internalized religiousness on adolescents' hazardous alcohol use as a function of expectancy valuations.
In vivo evaluation of optic nerve development in non‐human primates by using diffusion tensor imaging
Authors: Yan Yumei , Nair Govind , Li Longchuan , Patel Sudeep , Wilson Mark , Hu Xiaoping , Sanchez Mar , Zhang Xiaodong 
Published: July 2013

AbstractDevelopmental abnormalities of optic nerve are the leading cause of child blindness. The goal of this study was to use diffusion tensor imaging (DTI) to characterize the optic nerve development of non‐human primates during the normal maturation from birth to adulthood. Forty healthy rhesus monkeys aged from 2 weeks to 6 years old were scanned with a clinical 3 T scanner. It was demonstrated that the DTI parameters followed an exponential pattern during optic nerve maturation. The time constants of mean diffusivity (MD), fractional anisotropy (FA), axial diffusivity (λ∥) and radial diffusivity (λ⊥) were 16, 14, 18 and 15 months in rhesus monkeys, respectively. Significant decrease in RD was observed firstly at 12 months after birth (p < 0.05). No significant differences were observed between the left and right optic nerves in any age group. The in vivo imaging results reveal the normal evolution patterns of DTI parameters during optic nerve maturation in primates. The data might be used as a reference in the examination of optic nerve developmental abnormalities or injury in children or preclinical studies.
REGULATING FALLIBILITY IN REGISTERED LAND TITLES
Authors: Cooper Simon 
Published: July 2013

AbstractThis paper explores the circumstances in which a change in the land register should be stigmatised as a mistake and thereby introduce the discretionary power to correct it. Recognising the importance of clarifying the concept of mistake, due to its role in controlling the reliability of the register, the paper reviews and rejects various possible determinants for mistake. It proposes an account of mistake which rests on a set of rigid legal constructs about entitlement and registration and which pays respect to various traditional attributes of property.
Physiological response of temperate microphytobenthos to freezing temperatures
Authors: Lee Shi Hong , McMinn Andrew 
Published: July 2013

Microphytobenthos (MPB) contributes up to half the primary production of estuaries. These microorganisms are sensitive to changes in sediment temperatures, particularly the extreme temperatures during exposure periods. This study investigates the physiological responses of MPB to freezing temperatures at two locations near Hobart, Tasmania during winter. Photosynthetic parameters were measured at 2 mm intervals to a depth of 10 mm. FV/FM values at three different distances from the shoreline at Kings Beach and Browns River in winter were between 0.584 and 0.617. rETRmax values were between 24.696 and 20.773. Maximum α values peaked in the subsurface rather than at the sediment surface.In vitrolaboratory experiments (down to −5°C) showed little difference in response between the control and treatment groups, indicating no apparent effects of short term freezing on the MPB. Little change in photosynthetic parameters in response to freezing was probably associated with the resistance of light-harvesting reactions to freezing temperatures, recovery of the plasmalemma integrity or cryoprotection. Sediment composition and species composition were similar at both sampling sites. Therefore, responses of MPB were not due to species and grain size composition.
Biological threats and environmental pollutants, a lethal mixture for mediterranean cetaceans?
Authors: Lauriano Giancarlo , Di Guardo Giovanni , Marsili Letizia , Maltese Silvia , Fossi Maria Cristina 
Published: July 2013

The possible existence of any cause–effect relationships between the concentrations of organochlorines (OCs) and the presence ofMorbillivirusandToxoplasma gondiiinfections was investigated in both free-living and stranded specimens ofStenella coeruleoalba,Tursiops truncatus,Globicephala melas,Balaenoptera physalusandPhyseter macrocephalusfrom the Mediterranean Sea. High blubber concentrations of polychlorinated biphenyls (PCBs) and dichlorodiphenyltrichloroethane (DDT) were recorded in free-rangingG. melas. Tissue concentrations of PCBs and DDT in strandedT. truncatus(367 lipid weight (l.w.) and 143.7 mg/kg l.w., respectively) andS. coeruleoalba(139.9 l.w.; 92.9 mg/kg l.w.) were beyond the PCB threshold value for the appearance of adverse effects in marine mammals. Evidence ofT. gondiiinfection was molecularly detected in threeS. coeruleoalbaand sixT. truncatus.
Advances in the investigation of shock-induced reflectivity of porous carbon
Authors: Batani Dimitri , Paleari Stefano , Vinci Tommaso , Benocci Roberto , Shigemori Keisuke , Hironaka Yoichiro , Kadono Toshihiko , Shiroshita Akiyuki 
Published: July 2013

AbstractWe studied the behavior of porous carbon compressed by laser-generated shock waves. In particular, we developed a new design for targets, optimized for the investigation of carbon reflectivity at hundred-GPa pressures and eV/k temperatures. Specially designed “two-layer-two materials” targets, comprising porous carbon on transparent substrates, allowed the probing of carbon reflectivity and a quite accurate determination of the position in the P, T plane. This was achieved by the simultaneous measurement of shock breakout times, sample temperature (by optical pyrometry) and uid velocity. The experiments proved the new scheme is reliable and appropriate for reflectivity measurements of thermodynamical states lying out of the standard graphite or diamond hugoniot. An increase of reflectivity in carbon has been observed at 260 GPa and 14,000 K while no increase in reflectivity is found at 200 GPa and 20,000 K. We also discuss the role of numerical simulations in the optimization of target parameters and in clarifying shock dynamics.