bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geklebte Verbundbauteile aus Glas
Authors: Koschecknick Kai , Menkenhagen Jochen 
Published: April 2013

AbstractDer Fachbeitrag befasst sich mit der Betrachtung numerischer Untersuchungen zu geklebten Verbundbauteilen aus Glas. In diesem Zusammenhang wird insbesondere auf das Erforschen benötigter Materialparameter von Klebstoffen und das Implementieren dieser Materialeigenschaften in ein FE‐Programm näher eingegangen. Da der Klebstoff im Verbund mit den Fügebauteilen meist als schwächstes Glied das recht komplexe Verformungsverhalten des Verbundsystems beeinflusst und gleichzeitig diesem auch unterliegt, ist eine wirklichkeitsnahe Abbildung der Materialeigenschaften nur über die Generierung eines angepassten Datensets experimenteller Versuche möglich.Bonded composite components of glass. Subject of this technical paper is the numerical analysis of bonded composite components of glass. In this context especially within the research of required material properties of adhesives and the implementation of these characteristics into a FE‐software is gone into detail. As in most cases the adhesive in combination with the other components as the weakest part takes influence on the very complex deformation behaviour of the composite system and at the same time is also subject to it, the most realistic mapping of material characteristics can only be achieved by a generation of an adjusted data set resulting from experimental tests.
Untersuchungen zum Ermüdungsverhalten von gezielt vorgeschädigtem Floatglas aus Kalk‐Natron‐Silikatglas bei zyklischer Belastung
Authors: Hilcken Jonas , Boxheimer Kaja , Schneider Jens , Wörner Johann‐Dietrich 
Published: April 2013

AbstractBauteile, die zeitlich veränderlichen und periodisch wiederkehrenden Lasten ausgesetzt sind, müssen häufig auch hinsichtlich ihres Ermüdungsverhaltens eingestuft und bemessen werden. Im Glasbau fehlen hierzu noch Grundlagen auf der Widerstandsseite, denn das zyklische Ermüdungsverhalten von Glas für Anwendungen und Einwirkungen im Bauwesen ist im Unterschied zum statischen und dynamischen Ermüdungsverhalten bisher wenig untersucht. Der vorliegende Beitrag zeigt die Ergebnisse mehrerer Versuchsserien mit zyklischen Biegeversuchen von planmäßig vorgeschädigten Floatgläsern aus handelsüblichem Kalk‐Natron‐Silikatglas im Doppelring‐Biegeversuch und bei verschiedenen Frequenzen. Die Ergebnisse werden mit gängigen theoretischen Modellen zum Risswachstumsverhalten von Glas aus der Bruchmechanik verglichen.Investigation of the fatigue behavior of systematically pre‐damaged soda‐lime float glass under cyclic loading. Structural components subjected to fluctuating and cyclic loading frequently have to be classified and designed considering cyclic fatigue. For the design of glass elements in structural engineering, fundamental knowledge about the resistance of glasses exposed to cyclic loading is limited. This article subsumes the results of several tests series with commercial annealed float glass (soda‐lime‐silica glass) that was specifically impaired and then tested cyclically with different frequencies using the double‐ring bending test. The results are compared to common theoretical models from fracture mechanics for the crack propagation in glass.
Bewegung in der Gebäudehülle? Gegenüberstellung passiver und aktiver Konzepte
Authors: Heusler Winfried 
Published: April 2013

AbstractBei Gebäudehüllen lassen sich gegenwärtig zwei gegensätzliche Trends beobachten: Passive und aktive Konzepte. Passive Gebäudehüllen schotten den Innenraum so weit wie möglich gegen äußere Einflüsse ab. Zeitgemäße Gebäudetechnik sorgt für behagliche Raumbedingungen. Im zweiten Fall reagieren aktive Komponenten der Gebäudehülle zielgerichtet auf wechselnde äußere und innere Bedingungen. Dabei wird angestrebt, den Einsatz der Gebäudetechnik zu minimieren. Es zeigt sich, dass rein passive Gebäudehüllen gegenüber aktiven Konzepten nur dann Vorteile bieten, wenn der Standort, die Höhe oder die Nutzung des Gebäudes die natürliche Lüftung sowie Solarenergie‐ und Tageslichtnutzung in mindestens zwei Dritteln des Jahres ausschließen.Motion in the building envelope? Comparison of passive and active concepts. Two opposing trends can currently be observed with building envelopes: passive and active concepts. Passive building envelopes seal off the interior from external factors as far as possible. Contemporary building technology ensures a comfortable interior environment. Conversely, active components of the building envelope respond specifically to changing internal and external conditions. The aim here is to minimise the use of building technology. It shows that purely passive building envelopes are only advantageous when compared to active components if the location, the height or the use of the building excludes natural ventilation, as well as solar energy and use of natural light for at least two‐thirds of the year.
Zwischenbericht aus dem Arbeitskreis ‘Kantenfestigkeit‘ im Fachverband Konstruktiver Glasbau e.V. (FKG)
Authors: Ensslen Frank 
Published: April 2013

AbstractDer Arbeitskreis ‘Kantenfestigkeit‘ im Fachverband Konstruktiver Glasbau e.V. wurde im Oktober 2009 gegründet und setzt sich aus Vertretern von Universitäten und der Glasindustrie zusammen. Er hat sich zur Aufgabe gesetzt, die Kantenfestigkeit bzw. ‐qualität in Abhängigkeit der Bearbeitungsarten KG (geschnitten), KGS (gesäumt) und KGN (geschliffen) anhand der Glasdicken 4, 6, 8 mm (Floatglas) experimentell zu untersuchen. Herausforderung dabei ist, aussagekräftige Zusammenhänge und statistisch abgesicherte Ergebnisse zu ermitteln. Der vorliegende Beitrag ist ein Zwischenbericht des seit drei Jahren tätigen Arbeitskreises. Es werden Einzelheiten zum Versuchsprogramm und dessen Vorbereitungen erläutert sowie die einzelnen Projektphasen. Fundierte Ergebnisse können voraussichtlich ab Sommer/Herbst 2013 gezeigt werden.Interim report of the research group ‘Edge Strength’ at Fachverband Konstruktiver Glasbau. This working group was founded in October 2009. Representatives from universities and glass industry take part. The job is to investigate experimentally on the edge strength resp. edge quality dependent on the processing KG (cut), KGS (seamed), and KGN (Ground) for glass thicknesses 4, 6, 8 mm (Floatglass). The main challenge is to identify significant relations and to determine statistically assured results. This article is an interim report of three years work. The testing program and corresponding preparations are illustrated as well as the single project phases. Substantiated results are expected in summer/autumn 2013.
Load alleviation of wind turbines by yaw misalignment
Authors: Kragh Knud A. , Hansen Morten H. 
Published: April 2013

ABSTRACTVertical wind shear is one of the dominating causes of load variations on the blades of a horizontal axis wind turbine. To alleviate the varying loads, wind turbine control systems have been augmented with sensors and actuators for individual pitch control. However, the loads caused by a vertical wind shear can also be affected through yaw misalignment. Recent studies of yaw control have been focused on improving the yaw alignment to increase the power capture at below rated wind speeds. In this study, the potential of alleviating blade load variations induced by the wind shear through yaw misalignment is assessed. The study is performed through simulations of a reference turbine. The study shows that optimal yaw misalignment angles for minimizing the blade load variations can be identified for both deterministic and turbulent inflows. It is shown that the optimal yaw misalignment angles can be applied without power loss for wind speeds above rated wind speed. In deterministic inflow, it is shown that the range of the steady‐state blade load variations can be reduced by up to 70%. For turbulent inflows, it is shown that the potential blade fatigue load reductions depend on the turbulence level. In inflows with high levels of turbulence, the observed blade fatigue load reductions are small, whereas the blade fatigue loads are reduced by 20% at low turbulence levels. For both deterministic and turbulent inflows, it is seen that the blade load reductions are penalized by increased load variations on the non‐rotating turbine parts. Copyright © 2013 John Wiley & Sons, Ltd.
Global sensitivity analysis of wind turbine power output
Authors: McKay Phillip M. , Carriveau Rupp , Ting David S‐K. , Johrendt Jennifer L. 
Published: April 2013

ABSTRACTThe dynamics of wind turbine behavior are complex and a critical area of study for the wind industry. Identification of factors that cause changes in turbine performance can sometimes prove to be challenging, whereas other times, it can be intuitive. The quantification of the effect that these factors have is valuable for making improvements to both power performance and turbine health. In commercial farms, large quantities of meteorological and performance data are commonly collected to monitor daily operations. These data can also be used to analyze the relationship between each parameter in order to better understand the interactions that occur and the information contained within these signals. In this global sensitivity analysis, a neural network is used to model select wind turbine supervisory control and data acquisition system parameters for an array of turbines from a commercial wind farm that exhibit signs of wake interaction. An extended Fourier amplitude sensitivity test is then performed for 2 years of 10‐min averaged data. The study examines the primary and combined sensitivities of power output to each selected parameter for two turbines in the array. The primary sensitivities correspond to single parameter interactions, whereas combined sensitivities account for interactions between multiple parameters simultaneously. Highly influential parameters such as wind speed and rotor rotation frequency produce expected results; the extended Fourier amplitude sensitivity test method proved effective at quantifying the sensitivity of a wide range of more subtle inputs. These include blade pitch, yaw position, main bearing and ambient temperatures as well as wind speed and yaw position standard deviation. The technique holds promise for application in full‐scale wake studies where it might be used to determine the benefits of emerging power optimization strategies such as active wake management. The field of structural health monitoring can also benefit from this method. Copyright © 2013 John Wiley & Sons, Ltd.
Identifying streamgage networks for maximizing the effectiveness of regional water balance modeling
Authors: Fry L. M. , Hunter T. S. , Phanikumar M. S. , Fortin V. , Gronewold A. D. 
Published: April 2013

Key Points
Some gages are better than others for extrapolation of streamflow.
Increased gaged area is not necessarily better for extrapolation.
Similarity in some key physical properties increases ARM skill.
Prophylactic Lymph Node Dissection in Papillary Thyroid Carcinoma: Is There a Place for Lateral Neck Dissection?
Authors: Ducoudray Romain , Trésallet Christophe , Godiris‐Petit Gaelle , Tissier Frédérique , Leenhardt Laurence , Menegaux Fabrice 
Published: April 2013

AbstractBackgroundCervical lymph node (LN) metastases are common in patients with papillary thyroid carcinoma (PTC), and they have a negative impact on recurrence. The management of preoperatively node‐negative (N0) PTC is still controversial. The aim of our study was to describe the results of a prophylactic bilateral lymph node dissection (LND) and to investigate its impact on recurrence.MethodsFrom 2003 to 2011, we analyzed 603 consecutive preoperatively N0 PTC patients. For each patient, we reviewed demographics data, tumor characteristics, pattern and risk factors of LN metastasis, and outcome.ResultsLymph node metastases were found in 23 % of patients: 19 % in the central compartment and 8 % in the lateral compartment, including 1 % in the lateral compartment on the opposite side from the tumor. Multivariate analysis showed that hyperthyroidism and extrathyroidal invasion of the tumor were significantly associated with LN metastasis. Further analysis showed that localization of the tumor in the upper third of the thyroid lobe and metastatic LN in the central compartment were independent risk factors for lateral LN metastasis. During the 4.3‐year follow‐up, 23 recurrences were observed (4 %), including 5 in the central compartment. Recurrence rates were 2 % in the N0 group, 5 % in N1a patients, and 22 % in N1b patients (p < 0.001).ConclusionsIn preoperatively N0 PTC patients, LN metastases are frequent in central and ipsilateral lateral compartments. Prophylactic LND in the central and ipsilateral lateral compartments should therefore be recommended in the presence of PTC to identify high‐risk patients.
Microwave complex permeability of Fe3O4 nanoflake composites with and without magnetic field-induced rotational orientation
Authors: Liu Xianguo , Wing Or Siu , Ming Leung Chung , Ho S. L. 
Published: April 2013

Magnetite (Fe3O4) nanoflakes with widths of 100–200 nm and thicknesses of 10–80 nm were prepared by a hydrothermal synthesis method. Fe3O4 nanoflake composites with and without magnetic field-induced rotational orientation of flake planes of Fe3O4 nanoflakes in paraffin binder were fabricated using 35 wt. % Fe3O4 nanoflakes. The rotationally oriented composite showed higher permeability and resonance frequency than the nonoriented one, and its value of (μ0−1)fr reached 214.8 GHz and exceeded the Snoek's limit. Considering a uniform and a random distribution of flake planes of Fe3O4 nanoflakes in the oriented and nonoriented composites, respectively, the complex permeability of both composites was calculated using the Landau–Lifshitz–Gilbert equation and the Bruggeman's effective medium theory in the 2–18 GHz microwave frequency range.
Harnessing the value of beneficial micro-organisms: role of regulatory landscapes - Mini Review.
Authors: Sundh I. , Wilcks A. , Goettel M. S. 
Published: April 2013

Abstract
Beneficial micro-organisms, isolated from various environments, can be 'domesticated' and used in agriculture, food and biotechnology. An analysis is required for new microbial strains and applications to ensure safety. Various regulatory frameworks apply and in some instances registration is required before marketing. Regulatory demands must be tuned to actual risk. 'Overregulation' could hamper the implementation of useful products, whereas the lack of appropriate oversight could negatively affect public health or the environment. There is a need for further development and consolidation of safety assessment of beneficial micro-organisms as a unique research discipline and of risk-benefit analysis where risks are weighed against benefits.
The Feasibility of Telephone Follow-Up Interviews for Monitoring Treatment Outcomes of Australian Residential Drug and Alcohol Treatment Programs
Authors: Deane Frank P. , Kelly Peter J. , Crowe Trevor P. , Lyons Geoffrey C. B. , Cridland Elizabeth K. 
Published: April 2013

Background Telephone follow-up interviewing is one method of monitoring treatment outcomes of individuals involved in drug and alcohol treatment programs. The present study is the first to examine the feasibility and generalizability of data obtained from telephone follow-up interviews after drug and alcohol treatment in Australia. Methods Participants attended 1 of 8 Salvation Army Recovery Service Centres where staff administered outcome measures at intake. Three-month postdischarge telephone follow-up interviews were conducted by researchers from the Illawarra Institute for Mental Health, University of Wollongong. Results A sample of 700 clients was obtained for follow-up (582 males; 118 females). A 51% follow-up rate was achieved at a cost of US$82 per completed interview. No significant differences in baseline characteristics between responding and nonresponding participants were found. Conclusions Overall, the telephone methodology was shown to be feasible and relatively inexpensive. However, the introduction of outcome measures at the service level in parallel with follow-up data collection procedures complicated the collection of response data. The burden of introducing outcome measures in residential services may be reduced by utilizing a phased implementation strategy.
A tool for RNA sequencing sample identity check
Authors: Huang Jinyan , Chen Jun , Lathrop Mark , Liang Liming 
Published: April 2013

Abstract
Summary: RNA sequencing data are becoming a major method of choice to study transcriptomes, including the mapping of gene expression quantitative trait loci (eQTLs). RNA sample contamination or swapping is a serious problem for downstream analysis and may result in false discovery and lose power to detect the true biological relationships. When genetic data are available, for example, in eQTL studies or samples have been previously genotyped or DNA sequenced, it is possible to combine genetic data and RNA-seq data to detect sample contamination and resolve sample swapping problems. In this article, we introduce a tool (IDCheck) that allows easy assessment of concordance between genotype (from SNP arrays or DNA sequencing) and gene expression (RNA-seq) samples. IDCheck compares the identity of RNA-seq reads and SNP genotypes using a likelihood-based method. Based on maximum likelihood estimates of relevant parameters, we can detect sample contamination and identify correct sample pairs when swapping occurs. Our tool provides an efficient and convenient way to evaluate and resolve these problems.
Availability: A complete description of the software is included on the application home page. The software is freely available in the public domain at http://eqtl.rc.fas.harvard.edu/idcheck/.
Contact: lliang@hsph.harvard.edu
Supplementary information: Supplementary data are available at Bioinformatics online.
Twin enigmatic microseismic sources in the Gulf of Guinea observed on intercontinental seismic stations
Authors: Xia Yingjie , Ni Sidao , Zeng Xiangfang 
Published: April 2013

AbstractBased on studies of continuous waveform data recorded on broad-band seismograph stations in Africa, Europe and North America, we report evidences for two temporally persistent and spatially localized monochromatic vibrating sources (around 0.036 and 0.038 Hz, respectively) in the Gulf of Guinea, instead of just one source (0.038 Hz or 26 s) found 50 yr ago. The location of the 0.036 Hz source is close to the Sao Tome Volcano, therefore it may be related to volcano processes. However, the 0.038 Hz source cannot be explained with known mechanisms, such as tectonic or oceanic processes. The most likely mechanism is volcano processes, but there is no reported active volcano in source region. Such repetitive vibration sources may provide valuable tools for detecting temporal variation of crustal structure of the Earth.
Retaining the thin blue line
Authors: Gächter Martin , Savage David A. , Torgler Benno 
Published: April 2013

PurposeThe purpose of this paper is to investigate the relationship between workplace factors and the intentions of police officers to quit their current department.Design/methodology/approachData from a survey of Baltimore officers, designed to examine the relationship between police stress and domestic violence in police families were used. Using multivariate regression analysis, the authors focus on the officers' stated intentions to look for alternative employment, with proxies for social and workplace factors.FindingsHigher levels of cooperation (trust), interactional justice and work‐life‐balance reduce police officers' intentions to quit. While high levels of physical and psychological strain and trauma are not correlated with intentions to quit.Research limitations/implicationsA discernible limitation of this study is the age of the data analyzed and that many changes have occurred in recent times (policing and social). It would be of great interest to repeat this study to gauge the true effect.Practical implicationsThere are policy implications for retention and recruitment: it may possible to decrease the ethnic and gender gaps, through identifying officers at risk and creating programs to hold existing minorities, recruit more, whilst maintaining a strong, happy and healthy department.Originality/valueThis study examines the impact of workplace factors on quitting intention for police officers. It is demonstrated that social capital, fairness and work‐life balance are moderators for quitting, adding to the literature on worker retention, as little research has been done using multivariate analysis on quitting intentions.
Friedman, Schumpeter, and Greenspan's financial policies
Authors: Leathers Charles G. , Patrick Raines J. 
Published: April 2013

PurposeIn speeches and testimonies, Alan Greenspan claimed intellectual links between his financial policies and the ideas of Milton Friedman and Joseph A. Schumpeter on banks, central banks, and financial crises. As the financial crisis deepened in 2008, Greenspan admitted that his policies had been shockingly wrong. The purpose of this paper is to explain why his claims of intellectual links between those policies and the ideas of Friedman and Schumpeter were also wrong.Design/methodology/approachBeginning with representative examples of Greenspan's citations of Friedman and of Schumpeter as supporting his financial policies, the authors review the economic ideas of Friedman and Schumpeter on banks, central banks, and financial crises. In each case, we contrast Greenspan's financial policies with those ideas, demonstrating the spurious nature of his claims of intellectual links.FindingsWhile expanding the role of the Federal Reserve in the financial markets, Greenspan's financial policies were based on the declaration that deregulation and financial innovations were providing flexibility and stability for the entire financial system. In his financial policies, Greenspan rejected Friedman's recommendations for changes in the powers and functioning of the Federal Reserve that featured a monetary policy rule and the 100 percent reserve requirement for deposits that would involve the separation of depository banking from loans and investments. From a Schumpeterian perspective, Greenspan's policies encouraged and facilitated the massive “reckless” finance that was responsible for the financial crisis of 2007‐2009.Originality/valueGreenspan's legacy as Chairman of the Federal Reserve Board is one of policies that first contributed to recurring financial crises of increasing severity and were then followed by an extraordinary policy expansion of the Federal Reserve in attempts to cope with the crises. On that basis, it is important to have a clear understanding of the lack of intellectual support for those policies from the influential economists with whom he claimed intellectual links.
Issues in mobile learning technology
Authors: Little Bob 
Published: April 2013

PurposeThis paper aims to outline some key issues in mobile learning technology.Design/methodology/approachThe paper discusses the impact of mobile learning technology, based on the author's experience in the field.FindingsDecide, design, develop and deploy is the standard four‐step process relating to technology. The drivers for adopting new technologies in learning include not only the suppliers and the customers (the buyers) but also the consumers (users) – in other words, everyone. Increasingly – since about 2006 – consumers want to use mobile devices for learning and for the less formal “performance support”. Initially, there can a high cost of ownership (of the latest mobile devices). So the key issue for HR and learning & development (L&D) professionals is how to get the maximum value from, and use of, this technology.Originality/valueThe paper outlines key issues in mobile learning technology facing HR and L&D professionals, in particular how to get the maximum value from, and use of, this technology.