Refine
Year of publication
- 2024 (15)
- 2023 (112)
- 2022 (125)
- 2021 (111)
- 2020 (80)
- 2019 (81)
- 2018 (80)
- 2017 (65)
- 2016 (56)
- 2015 (29)
- 2014 (43)
- 2013 (42)
- 2012 (37)
- 2011 (42)
- 2010 (37)
- 2009 (36)
- 2008 (31)
- 2007 (16)
- 2006 (13)
- 2005 (13)
- 2004 (6)
- 2003 (17)
- 2002 (10)
- 2001 (9)
- 2000 (8)
- 1999 (5)
- 1998 (4)
- 1997 (2)
- 1996 (3)
- 1995 (4)
- 1994 (12)
- 1993 (19)
- 1992 (15)
- 1991 (12)
- 1990 (20)
- 1989 (13)
- 1988 (12)
- 1987 (9)
- 1986 (12)
- 1985 (10)
- 1984 (5)
- 1983 (3)
- 1981 (5)
- 1980 (5)
- 1979 (3)
- 1978 (1)
- 1977 (4)
- 1976 (5)
- 1975 (8)
Document Type
- Article (525)
- Conference Proceeding (162)
- Bachelor Thesis (149)
- Report (102)
- Working Paper (85)
- Book (73)
- Master's Thesis (66)
- Part of a Book (40)
- Periodical Part (38)
- Study Thesis (25)
Is part of the Bibliography
- no (1322)
Keywords
- Bibliothek (44)
- Digitalisierung (38)
- Milchwirtschaft (36)
- E-Learning (27)
- Molkerei (27)
- Ausbildung (23)
- Euterentzündung (23)
- Informationsmanagement (22)
- Computersicherheit (21)
- Herbarium (20)
One of the main concerns of this publication is to furnish a more rational basis for discussing bioplastics and use fact-based arguments in the public discourse. Furthermore, “Biopolymers – facts and statistics” aims to provide specific, qualified answers easily and quickly for decision-makers in particular from public administration and the industrial sector. Therefore, this publication is made up like a set of rules and standards and largely foregoes textual detail. It offers extensive market-relevant and technical facts presented in graphs and charts, which means that the information is much easier to grasp. The reader can expect comparative market figures for various materials, regions, applications, process routes, agricultural land use, water use or resource consumption, production capacities, geographic distribution, etc.
Der Bachelorstudiengang „Bibliotheks- und Informationsmanagement“ der Hochschule für den öffentlichen Dienst in Bayern (HföD) zeichnet sich durch seinen starken Praxisbezug aus. Mit der spezifischen Ausrichtung auf die wissenschaftlichen Bibliotheken, dem mehrstufigen Auswahlverfahren der Studierenden, der Gestaltung der beiden Praxismodule, der Konzeption des theoretischen Unterrichts und den begleitenden Veranstaltungen sowie den Strukturen, in die der Studiengang eingebunden ist, werden in dem vorliegenden Aufsatz die wichtigsten Elemente für diese starke Praxisbezogenheit vorgestellt.
This paper presents a cascaded methodology for enhancing the path accuracy of industrial robots by using advanced control schemes. It includes kinematic calibration as well as dynamic modeling and identification. This is followed by a centralized model-based compensation of robot dynamics. The implemented feed-forward torque control shows the expected improvements of control accuracy. However, external measurements show the influence of joint elasticities as systematic path errors. To further increase the accuracy an iterative learning controller (ILC) based on external camera measurements is designed. The implementation yields to significant improvements of path accuracy. By means of a kind of automated ”Teach-In”, an overall effective concept for the automated calibration and optimization of the accuracy of industrial robots in high-dynamic path-applications is realized.
The adsorption of O atoms on the Fe(1 1 0) surface has been investigated by density functional theory for increasing degrees of oxygen coverage from 0.25 to 1 monolayer, to follow the evolution of the Osingle bondFe(1 1 0) system into an FeO(1 1 1)-like monolayer. We found that the quasi-threefold site is the most stable adsorption site for all coverages, with adsorption energies of ∼2.8–4.0 eV per O atom. Oxygen adsorption results in surface geometrical changes such as interlayer relaxation and buckling, the latter of which decreases with coverage. The calculated vibrational frequencies range from 265 to 470 cm−1 for the frustrated translational modes and 480–620 cm−1 for the stretching mode, and hence are in good agreement with the experimental values reported for bulk FeO wüstite. The hybridization of the oxygen 2p and iron 3d orbitals increases with oxygen coverage, and the partial density of states for the Osingle bondFe(1 1 0) system at full coverage resembles the one reported in the literature for bulk FeO. These results at full oxygen coverage point to the incipient formation of an FeO(1 1 1)-like monolayer that would eventually lead to the bulk FeO oxide layer.
Molecular hydrogen production from amorphous solid water during low energy electron irradiation
(2017)
This work investigates the production of molecular hydrogen isotopologues (H2, HD, and D2) during low energy electron irradiation of layered and isotopically labelled thin films of amorphous solid water (ASW) in ultrahigh vacuum. Experimentally, the production of these molecules with both irradiation time and incident electron energy in the range 400 to 500 eV is reported as a function of the depth of a buried D2O layer in an H2O film. H2 is produced consistently in all measurements, reflecting the H2O component of the film, though it does exhibit a modest reduction in intensity at the time corresponding to product escape from the buried D2O layer. In contrast, HD and D2 production exhibit peaks at times corresponding to product escape from the buried D2O layer in the composite film. These features broaden the deeper the HD or D2 is formed due to diffusion. A simple random-walk model is presented that can qualitatively explain the appearance profile of these peaks as a function of the incident electron penetration.
The use of vibrational sum-frequency spectroscopy (VSFS) to study transferred graphene, produced by chemical vapour deposition, is presented. The VSF spectrum shows a clear CeH stretching mode at ~2924 cm⁻¹, which is attributed to residue of the polymer used for the transfer. This makes VSFS a powerful tool to identify adsorbates and contaminants affecting the properties of graphene.
The paper presents a comprehensive model of a banking system that integrates network effects, bankruptcy costs, fire sales, and cross-holdings. For the integrated financial market we prove the existence of a price-payment equilibrium and design an algorithm for the computation of the greatest and the least equilibrium. The number of defaults corresponding to the greatest price-payment equilibrium is analyzed in several comparative case studies. These illustrate the individual and joint impact of interbank liabilities, bankruptcy costs, fire sales and cross-holdings on systemic risk. We study policy implications and regulatory instruments, including central bank guarantees and quantitative easing, the significance of last wills of financial institutions, and capital requirements.
Objective
We aimed to investigate the proportion of young patients not returning to work (NRTW) at 1 year after ischemic stroke (IS) and during follow-up, and clinical factors associated with NRTW.
Methods
Patients from the Helsinki Young Stroke Registry with an IS occurring in the years 1994–2007, who were at paid employment within 1 year before IS, and with NIH Stroke Scale score ≤15 points at hospital discharge, were included. Data on periods of payment came from the Finnish Centre for Pensions, and death data from Statistics Finland. Multivariate logistic regression analyses assessed factors associated with NRTW 1 year after IS, and lasagna plots visualized the proportion of patients returning to work over time.
Results
We included a total of 769 patients, of whom 289 (37.6%) were not working at 1 year, 323 (42.0%) at 2 years, and 361 (46.9%) at 5 years from IS. When adjusted for age, sex, socioeconomic status, and NIH Stroke Scale score at admission, factors associated with NRTW at 1 year after IS were large anterior strokes, strokes caused by large artery atherosclerosis, high-risk sources of cardioembolism, and rare causes other than dissection compared with undetermined cause, moderate to severe aphasia vs no aphasia, mild and moderate to severe limb paresis vs no paresis, and moderate to severe visual field deficit vs no deficit.
Conclusions
NRTW is a frequent adverse outcome after IS in young adults with mild to moderate IS. Clinical variables available during acute hospitalization may allow prediction of NRTW.
Wir führen schrittweise in den Einsatz einer Java-Bibliothek ein, um Variationspunkte und deren Wertemengen in automatisiert bewerteten Programmieraufgaben zu spezifizieren und als XML-Datei zu exportieren. Solche Variationspunkte kommen bei individualisierbaren Programmieraufgaben zum Einsatz, bei denen jede Studentin und jeder Student eine eigene Variante einer Programmieraufgabe erhält.
In dieser Bachelorarbeit wird die Konzeption, Entwicklung und Evaluierung einer Web-Oberfläche der wissenschaftlichen Bildersuchmaschine NOA durchgeführt. Ziel ist es, eine hohe Benutzerfreundlichkeit zu erreichen. NOA ist ein von der DFG gefördertes Projekt mit dem Ziel, Bilder aus Open-Access-Veröffentlichungen nutzbar zu machen. Der theoretische Teil behandelt die Grundlagen der Web-Usability, weiterhin werden Methoden der Evaluation dargestellt. Der praktische Teil der vorliegenden Arbeit beinhaltet die Konzeption und deren Umsetzung mittels aktueller Auszeichnungs- und Skriptsprachen. Auf die Präsentation der entwickelten Web-Oberfläche folgt die Evaluation der Usability mittels der heuristischen Evaluation und dem Usability-Testing, welches von der Thinking-Aloud-Methode begleitet wird. Daraufhin werden Empfehlungen zur Verbesserung der Benutzerfreundlichkeit benannt. Die Arbeit bildet einen vollständigen Prozess zur Erstellung einer Website ab. So gibt sie Interessierten des Berufsfeldes Konzeption bzw. der Front-End-Entwicklung einen Einblick in übliche Tätigkeiten.