bluuebunny/crossref_metadata_2025_split huggingface dataset:
First principles studies of structural, electrical and magnetic properties of semiconductor nanowires
Authors: Galicka Marta , Buczko Ryszard , Kacman Perla , Lima Erika N. , Schmidt Tome M. , Shtrikman Hadas 
Published: August 2013

Abstractmagnified imageThis article reviews recent advances in theoretical description of the properties of various III–V and IV–VI nanowires, which have been obtained using simple ab initio methods. The impact of crystal structure, lateral surfaces, passivation of the dangling bonds and quantum confinement on the stability of the nanowires is discussed. The second part of the paper is devoted to the analysis of III–V and IV–VI nanowires doped with various, in particular magnetic, ions. The influence of the crystal structure of the wire on the segregation and formation energies of different dopants and thus on the electric and magnetic properties of the nanowires is shown. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Atomic hydrogen cleaning of In0.53Ga0.47As studied using synchrotron radiation photoelectron spectroscopy
Authors: Brennan Barry , Kumarappan Kumar , Hughes Greg 
Published: August 2013

AbstractThe removal of the native oxides from the In0.53Ga0.47As surface by exposure to atomic hydrogen has been investigated by highly surface sensitive synchrotron radiation based photoelectron spectroscopy. This shows that it is possible to fully remove the arsenic oxides at low temperatures, while still leaving a low concentration of stable Ga2O and In2O at the surface, and no evidence of indium loss from the substrate. The removal of surface carbon contamination is also seen, however full removal is only detected in the absence of prior substrate annealing. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Monocular Vision for Long‐term Micro Aerial Vehicle State Estimation: A Compendium
Authors: Weiss Stephan , Achtelik Markus W. , Lynen Simon , Achtelik Michael C. , Kneip Laurent , Chli Margarita , Siegwart Roland 
Published: August 2013

The recent technological advances in Micro Aerial Vehicles (MAVs) have triggered great interest in the robotics community, as their deployability in missions of surveillance and reconnaissance has now become a realistic prospect. The state of the art, however, still lacks solutions that can work for a long duration in large, unknown, and GPS‐denied environments. Here, we present our visual pipeline and MAV state‐estimation framework, which uses feeds from a monocular camera and an Inertial Measurement Unit (IMU) to achieve real‐time and onboard autonomous flight in general and realistic scenarios. The challenge lies in dealing with the power and weight restrictions onboard a MAV while providing the robustness necessary in real and long‐term missions. This article provides a concise summary of our work on achieving the first onboard vision‐based power‐on‐and‐go system for autonomous MAV flights. We discuss our insights on the lessons learned throughout the different stages of this research, from the conception of the idea to the thorough theoretical analysis of the proposed framework and, finally, the real‐world implementation and deployment. Looking into the onboard estimation of monocular visual odometry, the sensor fusion strategy, the state estimation and self‐calibration of the system, and finally some implementation issues, the reader is guided through the different modules comprising our framework. The validity and power of this framework are illustrated via a comprehensive set of experiments in a large outdoor mission, demonstrating successful operation over flights of more than 360 m trajectory and 70 m altitude change.
Über Energieverfahren in der praktischen Baustatik
Authors: Rosemeier Gustav‐Erich 
Published: August 2013

AbstractEnergetisch begründete Gesetze der Baustatik sind unabhängig vom System. Es ist deshalb möglich bei Linien‐ und Flächentragwerken z. B. mit Hilfe von Biegemomentengelenken und des Prinzips der virtuellen Arbeiten zwangläufig kinematisch verschiebliche Gelenkketten einzuführen, deren Ergebnisse mit Lösungen der exakten Theorien praktisch übereinstimmen.Energetic methods in practical statics. Energetic based laws of statics are independent variables of systems. That is why it is possible for line and plane load‐bearing structures e. g. to introduce bending moment joints in non‐rigid chain links by means of the principle of virtual work. The results of the approximate systems correspond to exact theories.
Tragverhalten und Gebrauchseigenschaften von kaltgefertigten rechteckigen Stahlbau‐Hohlprofilen
Authors: Ritakallio Pekka O. 
Published: August 2013

AbstractStahlbau‐Hohlprofile können entweder kalt‐ oder warmgefertigt werden. Aufgrund unterschiedlicher Herstellungsverfahren haben beide Typen unterschiedliche technische Eigenschaften. Mit Hinweis auf die Kaltumformung und die Inhomogenität des Querschnitts wird mitunter die Anwendbarkeit, Schweißbarkeit oder Zuverlässigkeit von kaltgefertigten Hohlprofilen ganz in Frage gestellt. Um eine technisch und wirtschaftlich sinnvolle Produktauswahl zu ermöglichen, werden deshalb verschiedene Einflüsse aus dem Herstellungsverfahren auf die Profileigenschaften und auf die Qualität und Zuverlässigkeit der daraus zu fertigenden Stahlkonstruktion näher beleuchtet. Festzustellen ist, dass gemäß DIN EN 10219 und nach Stand der Technik fachgerecht hergestellte kaltgefertigte Hohlprofile die Anforderungen nach Eurocode 3 an Tragfähigkeit und Dauerhaftigkeit ebenso sicher erfüllen wie warmgefertigte Hohlprofile nach DIN EN 10210. Für eine Vielzahl von Einsatzmöglichkeiten stellen kaltgefertigte Hohlprofile ein wirtschaftliches und zuverlässiges Bauprodukt dar.Structural performance of cold formed rectangular structural hollow sections. Structural hollow sections can be either cold formed or hot finished. The manufacturing methods of these two products are different and consequently the technical characteristics also vary. The applicability, weldability and reliability of cold formed hollow sections are sometimes questioned because of the consequences of cold forming and inhomogenous cross sections. In order to enable a technically and economically purposeful product selection, various influences of the manufacturing process on the quality and structural performance of the hollow sections are specifically described. It is established that properly manufactured cold formed structural hollow sections according to DIN EN 10219 and the State of the Art fulfil the requirements of Eurocode 3 for static strength and durability just as reliably as hot finished hollow sections according to DIN EN 10210. Cold formed hollow sections offer an economical and reliable structural product for a wide range of applications.
Ein angepasstes Ermüdungslastmodell für stählerne Stabbogenbrücken mit freistehenden Bögen
Authors: Bransch Martin , Priebe Jürgen , Starossek Uwe 
Published: August 2013

AbstractBei vorhandenen stählernen Stabbogenbrücken mit freistehenden Bögen werden häufig seitliche Bogenschwingungen festgestellt. Diese resultieren aus kritischen Achsfolgeimpulsen überfahrender Lkw und Resonanz. Vielfach wird ein langes Nachschwingen beobachtet. Hieraus folgt eine große Ermüdungsbeanspruchung für den Bogen und die angrenzenden Bauteile, welche mit den Ermüdungslastmodellen aus den aktuell gültigen DIN‐Fachberichten unzureichend erfasst wird. Um bei Neuplanungen solcher Brücken die große Ermüdungsbeanspruchung zu berücksichtigen, wird hier ein erweitertes Ermüdungslastmodell zur Bemessung vorgeschlagen. Dieses wird ELM 3a genannt und in Anlehnung an die DIN‐Fachberichte aufgestellt. Für das ELM 3a werden ein anpassbarer Achsabstand und eine anpassbare Geschwindigkeit eingeführt, um die Bogenschwingung zu maximieren. In diesem Zusammenhang wird eine vereinfachte Impulsform für die Radlasten angegeben, die z. B. in einer FEM‐Berechnung verwendet werden kann.An adjustable fatigue load model for steel bowstring bridges with free standing arches. Lateral arch vibrations are frequently observed at existing steel bowstring bridges. These result from critical axle arrangement loads of crossing trucks and resonance. A long post oscillation is often detected. Hence, a large fatigue load for the arch and the adjacent construction components exists, which is included in the actual standards insufficiently. An extended fatigue load model for structural design is presented to incorporate the large fatigue load while planning such bridges. It is called ELM 3a and is based on the fatigue load model 3 given in DIN Fachbericht 101. An adjustable distance between axles and an adjustable speed are introduced for the ELM 3a to maximize the lateral arch vibrations. A simplified impulse form is given for the wheel loads in this context, which can be used in an FEM calculation for example.
Frames with unique global and local imperfection in the shape of the elastic buckling mode (Part 1)
Authors: Chladný Eugen , Stujberová Magdalena 
Published: August 2013

AbstractThe principles and applications of the procedure using the equivalent unique global and local imperfection hinit,m (x) in the shape of the elastic buckling mode given in EN1993‐1‐1:2005, 5.3.2(11) and EN1999‐1‐1:2005 are presented here. The maximum amplitude of such an imperfection is determined from the fundamental requirement: the buckling resistance of the frame structure with axially loaded members only should be equal to the flexural buckling resistance of the equivalent member. The buckling resistance of such a frame is determined by the resistance of its critical cross‐section m with allowance for second‐order effects.In this paper basic formulas defining the equivalent unique global and local imperfection are established and other formulas useful for easier calculations in practical cases are shown too. Numerical examples provide guidance on the proper application of the procedure presented. The verification of the buckling resistance for the continuous frame in a numerical example shows good agreement with other methods from EN 1993‐1‐1:2005, 5.2.2(3) with application of imperfections according to EN 1993‐1‐1:2005, 5.3.2(3). Full agreement with the method 5.2.2(3)c) of EN 1993‐1‐1:2005 is always reached for individual uniform members with constant axial force along their whole length.Stabwerke mit einmaliger globaler und lokaler Imperfektion in der Form der elastischen Knickfigur (Teil 1). Die Prinzipen und Anwendungen des Verfahrens, welches die äquivalente, einmalige globale und lokale Imperfektion hinit,m (x) in der Form der elastischen Knickfigur für das gesamte Stabwerk verwendet, wie in EN 1993‐1‐1:2005, 5.3.2(11) und EN 1999‐1‐1:2005, werden hier vorgestellt. Die maximale Amplitude solch einer Imperfektion wird durch folgende grundlegende Bedingung bestimmt: Die Biegeknicktragfähigkeit des nur durch Axialkräfte beanspruchten Stabwerkes soll gleich der Biegeknicktragfähigkeit des Ersatzstabes sein. Die Biegeknicktragfähigkeit dieses Stabwerkes ist durch den Widerstand seines kritischen Querschnitts, unter Berücksichtigung der II. Ordnung‐Effekte, bestimmt.In diesem Beitrag werden grundsätzliche sowie auch für praktische Anwendung nützliche Formeln abgeleitet und dargestellt. Der Nachweis der Biegeknicktragfähigkeit des Tragwerkes mit steifen Anschlüssen in einem numerischen Beispiel bestätigt gute Übereinstimmung mit anderen Methoden aus EN 1993‐1‐1:2005, 5.2.2(3) unter Anwendung der Imperfektionen nach EN 1993‐1‐1:2005, 5.3.2(3). Volle Übereinstimmung mit der Methode 5.2.2(3)c) der EN 1993‐1‐1:2005 ist immer erreicht bei individuellen Stäben mit konstantem Querschnitt und gleichmäßiger Druckkraft.
NürnbergMesse – neuer Eingang Mitte
Authors: Stumpf Martin , Reinhardt Achim 
Published: August 2013

AbstractDer ehemalige Eingang Mitte der NürnbergMesse wurde seiner Rolle als Haupteingang nicht gerecht. Von außen schwer ablesbar, führte der niedrige Eingangsraum in eine unübersichtliche Gebäudestruktur. Anstatt der seit den 60er Jahren mehrfach ergänzten Messelandschaft lediglich einen weiteren additiven Baustein hinzuzufügen, schafft der Entwurf von kadawittfeldarchitektur mit dem 250 m langen und 57 m breiten Lamellendach ein neues Superzeichen, das mehrere Funktionen gleichzeitig erfüllt: Es ordnet die verschiedenen Bauteile der Messe, gibt ihr eine eindeutige Adresse, verbindet Innen‐ und Außenräume und definiert ein urbanes Foyer, das sich von der Zufahrt über den Vorplatz, den Eingang und das Hauptfoyer bis in den neuen Messepark erstreckt.Trade fair centre of Nuremberg – new main entrance. The entrance called “Mitte” of Nuremberg’s trade fair centre did not do justice to its purpose as the main entrance. Barely perceptible from the outside, the low‐ceilinged lobby led into building structure. Instead of simply adding another module to the existing trade fair compound built in the 1960s, the draft of kadawittfeldarchitektur sets up a new super‐feature: The 20 m high steel slat roof measuring 256 by 57 m spans the forecourt of the trade fair and forms the roof of the new entrance building.
Mehrgeschossiger Leichtbau: Aufstockung des Fahrzeug‐Logistic‐Centers Galliker
Authors: Brux Gunther 
Published: August 2013

AbstractEine bestehende Fahrzeughalle sollte bei Nutzung der vorhandenen Struktur in sehr kurzer Zeit wesentlich vergrößert werden. Dabei wurden innovative Systeme von der Planung bis zur Umsetzung genutzt, wie das Verbunddeckensystem ArcelorMittal und die neue Brandschutztechnologie Sika Unitherm platinum sowie angepasste Parkdeckbeschichtungen für dauerhafte Nutzungen.
Concise review: Combining human leukocyte antigen G and mesenchymal stem cells for immunosuppressant biotherapy
Authors: Naji Abderrahim , Rouas-Freiss Nathalie , Durrbach Antoine , Carosella Edgardo D. , Sensébé Luc , Deschaseaux Frédéric 
Published: August 2013

Abstract
Both human leukocyte antigen G (HLA-G) and multipotential mesenchymal stem/stromal cells (MSCs) exhibit immunomodulatory functions. In allogeneic tranplantation, the risks of acute and chronic rejection are still high despite improvement in immunosuppressive treatments, and the induction of a state of tolerance to alloantigens is not achieved. Immunomodulatory properties of MSCs and HLA-G in human allogeneic tranplantation to induce tolerance appears attractive and promising. Interestingly, we and others have demonstrated that MSCs can express HLA-G. In this review, we focus on the expression of HLA-G by MSCs and discuss how to ensure and improve the immunomodulatory properties of MSCs by selectively targeting MSCs expressing HLA-G (MSCsHLA-G+). We also discuss the possible uses of MSCsHLA-G+ for therapeutic purposes, notably, to overcome acute and chronic immune rejection in solid-organ allogeneic transplantation in humans. Since MSCs are phenotypically and functionally heterogeneous, it is of primary interest to have specific markers ensuring that they have strong immunosuppressive potential and HLA-G may be a valuable candidate.
Molecular Functions of the LIM-Homeobox Transcription Factor Lhx2 in Hematopoietic Progenitor Cells Derived from Mouse Embryonic Stem Cells
Authors: Kitajima Kenji , Kawaguchi Manami , Iacovino Michelina , Kyba Michael , Hara Takahiko 
Published: August 2013

Abstract
We previously demonstrated that hematopoietic stem cell (HSC)-like cells are robustly expanded from mouse embryonic stem cells (ESCs) by enforced expression of Lhx2, a LIM-homeobox domain (LIM-HD) transcription factor. In this study, we analyzed the functions of Lhx2 in that process using an ESC line harboring an inducible Lhx2 gene cassette. When ESCs are cultured on OP9 stromal cells, hematopoietic progenitor cells (HPCs) are differentiated and these HPCs are prone to undergo rapid differentiation into mature hematopoietic cells. Lhx2 inhibited differentiation of HPCs into mature hematopoietic cells and this effect would lead to accumulation of HSC-like cells. LIM-HD factors interact with LIM domain binding (Ldb) protein and this interaction abrogates binding of LIM-only (Lmo) protein to Ldb. We found that one of Lmo protein, Lmo2, was unstable due to dissociation of Lmo2 from Ldb1 in the presence of Lhx2. This effect of Lhx2 on the amount of Lmo2 contributed into accumulation of HSC-like cells, since enforced expression of Lmo2 into HSC-like cells inhibited their self-renewal. Expression of Gata3 and Tal1/Scl was increased in HSC-like cells and enforced expression of Lmo2 reduced expression of Gata3 but not Tal1/Scl. Enforced expression of Gata3 into HPCs inhibited mature hematopoietic cell differentiation, whereas Gata3-knockdown abrogated the Lhx2-mediated expansion of HPCs. We propose that multiple transcription factors/cofactors are involved in the Lhx2-mediated expansion of HSC-like cells from ESCs. Lhx2 appears to fine-tune the balance between self-renewal and differentiation of HSC-like cells. Stem Cells 2013;31:2680–2689
Kalibrierung von Schnüffel‐Testlecks
Authors: Jitschin Wolfgang , Farangis Baker 
Published: August 2013

AbstractIn speziellen Anwendungen wird eine Dichtheitsprüfung gegen Atmosphäre mit hoher Empfindlichkeit gefordert. Für diesen Zweck werden Leckschnüffler von der Industrie angeboten, deren Zuverlässigkeit nur dann gewährleistet ist, wenn der Leckschnüffler zum Zeitpunkt seines Einsatzes ordnungsgemäß arbeitet und richtig misst. Zur Kontrolle der Leckschnüffler werden Testlecks mit bekanntem Leckagestrom eingesetzt. Die vorliegende Veröffentlichung beschäftigt sich mit dem Aufbau und der Kalibrierung dieser Testlecks insbesondere für sehr kleine Leckagen.
Complete and Partial Organizing for Corporate Social Responsibility
Authors: Rasche Andreas , de Bakker Frank G. A. , Moon Jeremy 
Published: August 2013

AbstractThis paper investigates different modes of organizing for corporate social responsibility (CSR). Based on insights from organization theory, we theorize two ways to organize for CSR. “Complete” organization for CSR happens within businesses and depends on the availability of certain organizational elements (e.g., membership, hierarchy, rules, monitoring, and sanctioning). By contrast, “partial” organization for CSR happens when organizers do not have direct access to all these organizational elements. We discuss partial organization for CSR by analyzing how standards and cross-sector partnerships make selective use of organizational elements. We maintain that an important feature of the increasing institutionalization of CSR—not only within businesses but also among non-governmental, governmental, and professional actors—is the rise of partial forms of organization. We discuss the contributions to this Special Issue in the context of our theorization of complete/partial organization for CSR and outline avenues for further research.
Reintroduction of Imatinib in GIST
Authors: Reid T. 
Published: August 2013

Abstract

Purpose
This review examines the clinical evidence showing that imatinib can be prescribed to treat recurrence or progression of gastrointestinal stromal tumors (GIST) in patients who interrupted first-line imatinib therapy in the adjuvant or advanced/metastatic setting.

Methodology
A literature search was performed in PubMed, Web of Knowledge, and Google using the following keywords: rechallenge/reinitiation/reintroduction + gastrointestinal + imatinib and rechallenge/reinitiation/reintroduction + imatinib.

Results
The evidence indicates that the reintroduction of imatinib can benefit patients who experience GIST progression after interrupting treatment of advanced/metastatic disease, as well as patients who experience GIST recurrence after completing prescribed neoadjuvant and/or adjuvant therapy. Although reintroduction of imatinib may lead to suboptimal outcomes, as evidenced by higher rates of progressive disease compared to initial treatment, imatinib discontinuation does not appear to favor development of imatinib resistance, leaving dose escalation and third- or fourth-line imatinib treatment as viable options for patients.

Conclusion
Results indicate that after initial start and interruption of imatinib therapy, reintroduction of imatinib therapy is efficacious and provides continued survival benefit in patients with GIST.
Understanding the joint effects of family and other developmental contexts on the sense of coherence (SOC): A person‐focused analysis using the Classification Tree
Authors: García‐Moya Irene , Moreno Carmen , Jiménez‐Iglesias Antonia 
Published: August 2013

ABSTRACTUsing a person‐focused approach, the present study sought to identify meaningful constellations of contextual factors that led to predominantly high and low levels of sense of coherence (SOC). Specifically, the contributions of the quality of parent–child relationships, teacher and classmate support, models of behaviour in the peer group, and neighbourhood assets were examined in a representative sample of Spanish adolescents aged 13 to 18 that had taken part in the 2010 edition of the study Health Behaviour in School‐aged Children. The quality of parent–child relationships emerged as the main predictor of SOC for the whole sample, but the remaining factors also made significant contributions, which underlines the importance of the simultaneous analysis of the main contexts in adolescents' lives. Additionally, the identified constellations usually included compensatory effects, so no factor should be considered to be completely determining. Interestingly, the role of support at school was different depending on contextual profiles.
Frequency and clinical correlates of bipolar features in acute coronary syndrome patients
Authors: Pini S. , Abelli M. , Gesi C. , Lari L. , Cardini A. , Di Paolo L. , Felice F. , Di Stefano R. , Mazzotta G. , Oligeri C. , Bovenzi F.M. , Borelli L. , Bertoli D. , Michi P. , Muccignat A. , Micchi J. , Balbarini A. 
Published: August 2013

AbstractBackground:Depression and acute coronary syndrome (ACS) are both extremely prevalent diseases. Studies aimed at evaluating whether depression is an independent risk factor for cardiac events provided no definitive results. In most of these studies, depression has been broadly defined with no differentiation between unipolar (MDD) versus bipolar forms (BD). The aim of this study was to evaluate the frequency of DSM-IV BD (bipolar I and bipolar II subtypes, cyclothymia), as well as temperamental or isolated bipolar features in a sample of 171 patients hospitalized for ACS. We also explored whether these psychopathological conditions were associated with some clinical characteristics of ACS.Methods:Patients with ACS admitted to three neighboring Cardiac Intensive Care Units (CICUs) in a 12-month continuative period of time were eligible for inclusion if they met the criteria for either acute myocardial infarct with or without ST-segment elevation or unstable angina, verified by standard ACS criteria. All patients underwent standardized cardiological and psychopathological evaluations.Results:Of the 171 ACS patients enrolled, 37 patients (21.7%) were found to have a DSM-IV mood disorder. Of these, 20 (11.7%) had bipolar type I or type II or cyclothymia, while 17 (10%) were the cases of MDD. Rapid mood switches ranged from 11% of ACS patients with no mood disorders, to 47% of those with MDD to 55% of those with BD. Linear regression analysis showed that a diagnosis of BD (p = .023), but not that of MDD (p = .721), was associated with a significant younger age at the index episode of ACS. A history of previous coronary events was more frequent in ACS patients with BD than in those with MDD.Conclusions:Our data indicate that bipolar features and diagnosis are frequent in ACS patients. Bipolar disorder has a negative impact on cardiac symptomatology. Further research in this area is warranted.