54 research outputs found
Further development of the ergonomics assessment model EAWS for the ergonomic assessment of the use of augmented reality glasses in the workplace.
Get PDFDie potenziellen Chancen durch die Digitalisierung am Arbeitsplatz durch beispielsweise den Einsatz von Augmented Reality (AR)-Brillen und der bedeutenden, gesundheitspolitischen Aufgabe eines Unternehmens gesunde beziehungsweise (bzw.) ergonomische Arbeitsplätze für MitarbeiterInnen zu schaffen, zeigen die Notwendigkeit der ergonomischen Bewertung von möglichen Belastungen durch den Einsatz von AR-Brillen im Arbeitsalltag auf. Aus diesem Grund befasst sich diese Arbeit mit einer Möglichkeit Belastungen durch die Anwendungen von AR-Brillen in das geläufige Ergonomiebewertungsmodell Ergonomic Assessment Worksheet(EAWS) zu integrieren. Nach einer Literaturrecherche zu diesem Thema, wurden ausgewählte Studien beschrieben. Weiterführend befasst sich diese Arbeit mit einer Möglichkeit wie in der aktuellen Version von EAWS Belastungen durch eine AR-Brille berücksichtigt werden können. Als mögliche Herangehensweise wird die Zuteilung im Bereich Lasten zu den Händen überprüft. Dafür wurde eine Arbeitstätigkeit mit Einsatz einer AR-Brille aus der Praxis definiert und beschrieben. Dieser Arbeitsablauf wurde einerseits in einem technischen Umfeld praktisch umgesetzt sowie andererseits mittels EMA Work Designer in einem virtuellen Arbeitsplatz simuliert. Unter beiden Rahmenbedingungen erfolgte eine Ergonomiebewertung mittels EAWS. Die beiden resultierenden Ergebnisse wurden weiterführend verglichen, analysiert und potenzielle Schlussfolgerungen daraus abgeleitet. Die mögliche Berücksichtigung der Belastungen durch AR-Brillen in der aktuellen Version von EAWS über die Zuteilung zu den Lasten der Hände scheint aufgrund der Ergebnisse unzureichend. Folglich wird eine weitere Herangehensweise über den Bereich „Extra“ beschrieben, sowie auf verschiedene relevante Aspekte, die für die ergonomische Bewertung von AR-Brillen Relevanz haben, eingegangen.The potential opportunities through digitalization in the workplace, for example using augmented reality (AR)-glasses, and the important health policy task of a company to create healthy or ergonomic workplaces for employees, highlight the need for an ergonomic assessment of stress caused by using AR-glasses in work. For this reason, this master thesis deals with a possibility to integrate physical stress caused by using AR-glasses into the common ergonomics assessment model Ergonomic Assessment Worksheet (EAWS). After literature research on this topic, selected studies were described. Further on, this master thesis deals with a possibility how loads caused by AR-glasses can be considered in the actual version of EAWS. As a possible approach, the allocation to the area of loads to the hands is reviewed. For this purpose, a work activity using AR-glasses from practice was defined and described. This work process was implemented in a practical, technical environment and was simulated in a virtual workplace using EMA Work Designer. Under both conditions, an ergonomics evaluation was done by using EAWS. Both results were compared, analyzed and possible conclusions were derived. The possible consideration of the loads of ARglasses in the current version of EAWS by the allocation to the area of loads to the hands seems insufficient due to the results. Consequently, a further approach using the “Extra” section is described, as well as various relevant aspects that have relevance for the ergonomic evaluation of AR-glasses
An erasure-resilient and compute-efficient coding scheme for storage applications
No full textDriven by rapid technological advancements, the amount of data that is created, captured, communicated, and stored worldwide has grown exponentially over the past decades. Along with this development it has become critical for many disciplines of science and business to being able to gather and analyze large amounts of data. The sheer volume of the data often exceeds the capabilities of classical storage systems, with the result that current large-scale storage systems are highly distributed and are comprised of a high number of individual storage components. As with any other electronic device, the reliability of storage hardware is governed by certain probability distributions, which in turn are influenced by the physical processes utilized to store the information. The traditional way to deal with the inherent unreliability of combined storage systems is to replicate the data several times. Another popular approach to achieve failure tolerance is to calculate the block-wise parity in one or more dimensions. With better understanding of the different failure modes of storage components, it has become evident that sophisticated high-level error detection and correction techniques are indispensable for the ever-growing distributed systems. The utilization of powerful cyclic error-correcting codes, however, comes with a high computational penalty, since the required operations over finite fields do not map very well onto current commodity processors. This thesis introduces a versatile coding scheme with fully adjustable fault-tolerance that is tailored specifically to modern processor architectures. To reduce stress on the memory subsystem the conventional table-based algorithm for multiplication over finite fields has been replaced with a polynomial version. This arithmetically intense algorithm is better suited to the wide SIMD units of the currently available general purpose processors, but also displays significant benefits when used with modern many-core accelerator devices (for instance the popular general purpose graphics processing units). A CPU implementation using SSE and a GPU version using CUDA are presented. The performance of the multiplication depends on the distribution of the polynomial coefficients in the finite field elements. This property has been used to create suitable matrices that generate a linear systematic erasure-correcting code which shows a significantly increased multiplication performance for the relevant matrix elements. Several approaches to obtain the optimized generator matrices are elaborated and their implications are discussed. A Monte-Carlo-based construction method allows it to influence the specific shape of the generator matrices and thus to adapt them to special storage and archiving workloads. Extensive benchmarks on CPU and GPU demonstrate the superior performance and the future application scenarios of this novel erasure-resilient coding scheme
Accelerating Galois Field Arithmetic for Reed-Solomon Erasure Codes in Storage Applications
No full textVergleich einer neuen Zweinutzungs- mit einer Legehybride bzgl. Tiergerechtheit und Legeleistung
No full textAim of the study was to compare a new dual purpose hybrid strain (Lohmann dual, LD) with a layer strain (Lohmann Brown plus, LB) under organic conditions. 400 Laying hens were kept in 2 mobile houses (2 x 4 groups of 50 hens). Egg production
and egg weight were higher in LBP. LBP hens used the pasture more than LD. However, foraging was the main activity in both strains. LD hens showed less behavioral activity within the hen house. Plumage condition was better in LBP
The "Notariatsaktgesetz" de lege lata et ferenda
No full text(von der Verfasserin) Die Pflicht, bestimmte Verträge und Rechtshandlungen in der Form eines Notariatsaktes vorzunehmen, ist im Notariatsaktsgesetz geregelt. Bei der Notariatsaktspflicht handelt es sich um eine unabdingbare Formvorschrift, die beim Abschluss gewisser Rechtsgeschäfte eingehalten werden muss. In den ersten beiden Kapiteln der Arbeit wird eine Einführung in die Thematik des Notariats gegeben, in der vor allem die historischen Hintergründe sowie die Rechte und Pflichten eines Notars genauer betrachtet werden. Das dritte Kapitel beleuchtet die Stellung von blinden Personen bei Vertragsabschlüssen und ob die bestehenden Formvorschriften, die Blinde zu ihrem Schutz zu beachten haben, noch notwendig sind oder nicht. Anschließend werden die einzelnen Regelungstatbestände des Notariatsaktsgesetzes dargestellt und analysiert. In diesem Zusammenhang wird auch die Frage gestellt ob der Weiterbestand der Pflicht, Rechtsgeschäfte nur in Form eines Notariatsaktes abschließen zu können, auch de lege ferenda sinnvoll ist, oder ob eine Aufhebung bzw. Modernisierung der Tatbestände in Betracht zu ziehen wäre. Weiters wird eine mögliche Eingliederung des Inhalts des Notariatsaktsgesetzes in das ABGB und eine damit einhergehende mögliche Aufhebung des Notariatsaktsgesetzes diskutiert. Im letzten Kapitel wird eine Zusammenfassung des Inhalts der Diplomarbeit vorgenommen und ein Ausblick in eine mögliche Zukunft des Notariatsaktsgesetzes gegeben.(from the Author) The obligation to conclude certain contracts and legal acts in form of a notarial act is regulated in the Notariatsaktsgesetz. The notarial act obligation is an indispensable formal requirement that must be adhered to when closing certain legal acts. The first two chapters will provide an introduction to the topic of the notary with special regard to the historical background and the rights and duties of a notary. The third chapter will deal with the position of blind people when closing a contract and whether the existing formal requirements, which blind people have to bear in mind for safety reasons, are still necessary or not. Furthermore, the individual elements of regulation of the notarial act will be presented and analysed. In this context, the question of whether maintaining the obligation of concluding certain legal acts exclusively in the form of a notarial act is reasonable de lege ferenda or if a repeal or modernisation of the matters of facts should be considered will be raised. Moreover, a possible integration of the notarial act into the ABGB and hence the repeal of the Notariatsaktsgesetz are discussed. The final chapter provides a summary of this paper and presents a possible amendment of the Notariatsaktsgesetz.von Lydia Elena KalcherAbweichender Titel laut Übersetzung des Verfassers/der VerfasserinDiplomarbeit Karl-Franzens-Universität Graz 2021 R1005
Low Cost Hydrogen Peroxide Sensor from Manganese Oxides Modified Pencil Graphite Electrode
No full textAbstractElectrodeposition of manganese oxides film onto the cheap pencil graphite electrode using potassium permanganate precursor provides the good alternative method of fabrication the low cost hydrogen peroxide sensor. Effect of deposition potential, deposition time and concentration of potassium permanganate were investigated. The modified electrode displayed electrocatalytic activity towards the oxidation of hydrogen peroxide in alkaline medium. Amperometric detection of hydrogen peroxide in ammonium buffer pH 9.0 is possible at the operation potential of +0.50V vs Ag/AgCl instead of over +0.80V vs Ag/AgCl with unmodified electrode. Linear concentration range between 0.50-138ppm of hydrogen peroxide was obtained with a detection limit of 0.28ppm
Neutral pion production at midrapidity in pp and Pb–Pb collisions at √ sNN TeV
No full textInvariant yields of neutral pions at midrapidity in the transverse momentum range (Formula presented.)c measured in Pb–Pb collisions at (Formula presented.) TeV are presented for six centrality classes. The pp reference spectrum was measured in the range (Formula presented.)c at the same center-of-mass energy. The nuclear modification factor, (Formula presented.), shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about (Formula presented.) for (Formula presented.) ≲(Formula presented.)c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations. © 2014, The Author(s)
Suppression of ψ(2S) production in p-Pb collisions at √sNN = 5.02 TeV
No full textAbstract: The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy (formula presented.) = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production.[Figure not available: see fulltext. © 2014, The Author(s)
ALICE HLT high speed tracking on GPU
No full textThe on-line event reconstruction in ALICE is performed by the High Level Trigger, which should process up to 2000 events per second in proton-proton collisions and up to 300 central events per second in heavy-ion collisions, corresponding to an inp ut data stream of 30 GB/s. In order to fulfill the time requirements, a fast on-line tracker has been developed. The algorithm combines a Cellular Automaton method being used for a fast pattern recognition and the Kalman Filter method for fitting of found trajectories and for the final track selection. The tracker was adapted to run on Graphics Processing Units (GPU) using the NVIDIA Compute Unified Device Architecture (CUDA) framework. The implementation of the algorithm had to be adjusted at many points to allow for an efficient usage of the graphics cards. In particular, achieving a good overall workload for many processor cores, efficient transfer to and from the GPU, as well as optimized utilization of the different memories the GPU offers turned out to be critical. To cope with these problems a dynamic scheduler was introduced, which redistributes the workload among the processor cores. Additionally a pipeline was implemented so that the tracking on the GPU, the initialization and the output process ed by the CPU, as well as the DMA transfer can overlap. The GPU tracking algorithm significantly outperforms the CPU version for large events while it entirely maintains its efficiency
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