cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First law and second law analysis of processes
Creators: name: Wadsley, Michael Wright.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
How can we get technology taught in schools?
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: "How do we get technology taught in schools" is a question that is increasingly being asked by those parts of our educational system which impart technical skills, i.e. vocational schools, businesses and technical colleges. It is not only because of demographic changes that technology-oriented areas of post-school education are faced with quantitative but also qualitative youth shortages. Fewer and fewer young people are choosing a technical education while the basic technical skills of future generations are decreasing. To quote an instructor of a large company: "half of the trainees we chose to have this year for the job of industrial mechanic could not even perform simple repairs to a bike"...
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 1 (2016): Journal of Technical Education (JOTED)
Work Empowerment and Job Satisfaction Among Nurse Managers in a Military Hospital in the Kingdom of Saudi Arabia
Creators: name: Alcudia, Danna Mae
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Nursing
subject: FOS: Health sciences
subject: Health and Medical Services in Society

description: This study aimed to determine the work empowerment and its relationship to job satisfaction by the nurse managers in a tertiary government hospital in Riyadh, Saudi Arabia. The descriptive-correlational research design was employed in the study. The respondents were 98 nurse managers chosen through purposive sampling. Data were gathered using the adopted questionnaire-checklist. The statistical tools used were frequency, percentages, mean, standard and Pearson’s r set at .05 alpha levels. All statistical computations were availed of Statistical Package for the Social Sciences (SPSS) software version 25. Results revealed that majority of the respondents were female, Filipino, charge nurse, ages 30-49 years old, with bachelor’s degree, and with less than or equal to 5 years in service. As to work empowerment, nurse managers have moderate levels in terms of access to support, resources, information, and formal power. While in terms of access to opportunity and informal power, nurse managers have high levels of empowerment. Overall, nurse managers have moderate levels of work empowerment. Likewise, Nurse Managers were moderately satisfied on their job in terms of task requirements, interaction, organizational policies, autonomy, and remuneration and they were highly satisfied in terms of professional status. Overall, nurse managers were moderately satisfied with their job. In addition, there is no significant relationship existed between all factors in work empowerment and sex and nationality. As to age, significant relationship existed on access to information, but no significant relationship on the rest of the factors in work empowerment. Likewise, there is significant relationship between length of service and access to opportunity, but no significant relationship on the rest of the factors in work empowerment. Further, there is no significant relationship existed between job satisfaction and sex and length of service. In the same manner, significant relationship existed between job satisfaction and professional status, but the rest of the factors showed no relationship. Furthermore, no significant relationships existed between nationality and task requirements, autonomy, and professional status, interaction, organizational policies, and remuneration. Moreover, there is enough evidence to conclude that the nurse manager’s perceived work empowerment is associated with its job satisfaction.
description: Masters Thesis
Soliton mechanics
Creators: name: Gunasekaran, Sharmila
name: Hussain, Uzair
name: Kunduri, Hari K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The domain of outer communication of five-dimensional asymptotically flat stationary spacetimes may possess non-trivial 2-cycles (bubbles). Spacetimes containing such 2-cycles can have non-zero energy, angular momenta, and charge even in the absence of horizons. A mass variation formula has been established for spacetimes containing bubbles and possibly a black hole horizon. This `first law of black hole and soliton mechanics' contains new intensive and extensive quantities associated to each 2-cycle. We consider examples of such spacetimes for which we explicitly calculate these quantities and show how regularity is essential for the formulae relating them to hold. We also derive new explicit expressions for the angular momenta and charge for spacetimes containing solitons purely in terms of fluxes supporting the bubbles.
description: 18 pages, 3 figures
Controllable Majorana vortex states in iron-based superconducting nanowires
Creators: name: Li, Chuang
name: Luo, Xun-Jiang
name: Chen, Li
name: Liu, Dong E.
name: Zhang, Fu-Chun
name: Liu, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: There has been experimental evidence for the Majorana zero modes (MZMs) in solid state systems, which are building blocks for potential topological quantum computing. It is important to design devices, in which MZMs are easy to manipulate and possess a broad topological non-trivial parameter space for fusion and braiding. Here, we propose that the Majorana vortex states in iron-based superconducting nanowires fulfill these desirable conditions. This system has a radius-induced topological phase transition, giving a lower limit to the radius of the nanowire. In the topological phase, there is only one pair of MZMs in the nanowire over a wide range of radius, chemical potential, and external magnetic field. The wavefunction of the MZM has a sizable distribution at the side edge of the nanowire. This property enables one to control the interaction of the MZMs in neighboring vortex nanowires, and paves the way for Majorana fusion and braiding.
description: 13 pages and 7 figures
Adjustable straight-line linkages and walking vehicle legs
Creators: name: Ryan, Allan David.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
End-to-End Video-To-Speech Synthesis using Generative Adversarial Networks
Creators: name: Mira, Rodrigo
name: Vougioukas, Konstantinos
name: Ma, Pingchuan
name: Petridis, Stavros
name: Schuller, Björn W.
name: Pantic, Maja
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Video-to-speech is the process of reconstructing the audio speech from a video of a spoken utterance. Previous approaches to this task have relied on a two-step process where an intermediate representation is inferred from the video, and is then decoded into waveform audio using a vocoder or a waveform reconstruction algorithm. In this work, we propose a new end-to-end video-to-speech model based on Generative Adversarial Networks (GANs) which translates spoken video to waveform end-to-end without using any intermediate representation or separate waveform synthesis algorithm. Our model consists of an encoder-decoder architecture that receives raw video as input and generates speech, which is then fed to a waveform critic and a power critic. The use of an adversarial loss based on these two critics enables the direct synthesis of raw audio waveform and ensures its realism. In addition, the use of our three comparative losses helps establish direct correspondence between the generated audio and the input video. We show that this model is able to reconstruct speech with remarkable realism for constrained datasets such as GRID, and that it is the first end-to-end model to produce intelligible speech for LRW (Lip Reading in the Wild), featuring hundreds of speakers recorded entirely `in the wild'. We evaluate the generated samples in two different scenarios -- seen and unseen speakers -- using four objective metrics which measure the quality and intelligibility of artificial speech. We demonstrate that the proposed approach outperforms all previous works in most metrics on GRID and LRW.
description: Published in IEEE Transactions on Cybernetics (April 2022)
Kompetenzförderung im Naturwissenschaft- und Technik-Unterricht durch den Bau von Aufwindkraftwerksmodellen
Creators: name: Jannack, Verena
name: Knemeyer, Jens-Peter
name: Marmé, Nicole
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: Naturwissenschaftlich-technische Grundbildung und Kompetenzförderung sind zwei Ziele des Naturwissenschaft- und Technik-Unterrichts. Um diese zu erreichen, integriert das UnterrichtsÂ­Â­konzept Lucycity Problembasiertes Lernen in den Unterricht. Neben dem Konzept wird eine Unterrichtseinheit vorgestellt, bei der die Schülerinnen und Schüler die Aufgabe erhalten ein funktionierendes Modell eines Aufwindkraftwerks zu bauen, eine Versuchsreihe zur OptiÂ­mierung durchzuführen und die Ergebnisse in einem Fachartikel darzustellen. Die Antworten einer begleitenden Befragung der Schülerinnen und Schüler stärken die Vermutung, dass das interdisziplinäre Projekt naturwissenschaftliche Arbeitsweisen, Teamarbeit und die Arbeit mit wissenschaftlichen Texten - teilweise auch geschlechtsÂ­spezifisch - fördert. Schlüsselwörter: NwT-Unterricht, Kompetenzförderung, naturwissenschaftlich-technische ArbeitsÂ­Â­weisen, Problembasiertes Lernen
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 1 (2016): Journal of Technical Education (JOTED)
Minimal and Reduced Reversible Automata
Creators: name: Lavado, Giovanna J.
name: Pighizzini, Giovanni
name: Prigioniero, Luca
Publisher: name: arXiv
Year: 2016
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.1.1; F.4.3
subject: 68Q45

description: A condition characterizing the class of regular languages which have several nonisomorphic minimal reversible automata is presented. The condition concerns the structure of the minimum automaton accepting the language under consideration. It is also observed that there exist reduced reversible automata which are not minimal, in the sense that all the automata obtained by merging some of their equivalent states are irreversible. Furthermore, a sufficient condition for the existence of infinitely many reduced reversible automata accepting a same language is given. It is also proved that, when the language is accepted by a unique minimal reversible automaton (that does not necessarily coincide with the minimum deterministic automaton), then no other reduced reversible automata accepting it can exist.
description: Preliminary version presented at DCFS 2016 --- Descriptional Complexity of Formal Systems, Bucharest, Romania, Jul 5-8, 2016
Government Support and Export: A DID Approach
Creators: name: Regassa, Eyerusalem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: The government of Ethiopia have been trying to create a good environment for investors and exporters of non-traditional product by providing different export and investment incentives. Among these are the Export Trade Duty Incentives and Export Credit Guarantee Scheme. This study investigates the impact of these schemes on export. A Difference -in-Difference methodology was used to estimate effects of the two export incentives adopted in Ethiopia. With data for individual exporters of the year 2000and 2002 , the DID estimation shows significant impact of export incentives on export .But this should not be over emphasised ,one has to look at the costs for the government either in terms of foreign exchange or opportunity cost of the funds to the country. The government have been providing substantial amount of support to exporter up on their demand to hit the intended target with out no cross checking of whether the subsidy have been used properly or not as long as the firm export the targeted amount. Hence thinking of what this funds could do in other sector or areas of investment. As well thinking of how little variation of export is explained by subsidy as it shown in the DID methodology. The government should consider the cost of subsidy hand in hand with the gain from this subsidy.
Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at $\sqrt{s} =$ 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is presented for long-lived particles produced in pairs in proton-proton collisions at the LHC operating at a center-of-mass energy of 13 TeV. The data were collected with the CMS detector during the period from 2015 through 2018, and correspond to a total integrated luminosity of 140 fb$^{-1}$. This search targets pairs of long-lived particles with mean proper decay lengths between 0.1 and 100 mm, each of which decays into at least two quarks that hadronize to jets, resulting in a final state with two displaced vertices. No significant excess of events with two displaced vertices is observed. In the context of $R$-parity violating supersymmetry models, the pair production of long-lived neutralinos, gluinos, and top squarks is excluded at 95% confidence level for cross sections larger than 0.08 fb, masses between 800 and 3000 GeV, and mean proper decay lengths between 1 and 25 mm.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-19-013 (CMS Public Pages)
Non-signaling deterministic models for non-local correlations have to be uncomputable
Creators: name: Bendersky, Ariel
name: Senno, Gabriel
name: de la Torre, Gonzalo
name: Figueira, Santiago
name: Acin, Antonio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum mechanics postulates random outcomes. However, a model making the same output predictions but in a deterministic manner would be, in principle, experimentally indistinguishable from quantum theory. In this work we consider such models in the context of non-locality on a device independent scenario. That is, we study pairs of non-local boxes that produce their outputs deterministically. It is known that, for these boxes to be non-local, at least one of the boxes' output has to depend on the other party's input via some kind of hidden signaling. We prove that, if the deterministic mechanism is also algorithmic, there is a protocol which, with the sole knowledge of any upper bound on the time complexity of such algorithm, extracts that hidden signaling and uses it for the communication of information.
description: 5 pages, 2 figures
Practical Channel Estimation and Phase Shift Design for Intelligent Reflecting Surface Empowered MIMO Systems
Creators: name: Kim, Sucheol
name: Lee, Hyeongtaek
name: Cha, Jihoon
name: Kim, Sung-Jin
name: Park, Jaeyong
name: Choi, Junil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, channel estimation techniques and phase shift design for intelligent reflecting surface (IRS)-empowered single-user multiple-input multiple-output (SU-MIMO) systems are proposed. Among four channel estimation techniques developed in the paper, the two novel ones, single-path approximated channel (SPAC) and selective emphasis on rank-one matrices (SEROM), have low training overhead to enable practical IRS-empowered SU-MIMO systems. SPAC is mainly based on parameter estimation by approximating IRS-related channels as dominant single-path channels. SEROM exploits IRS phase shifts as well as training signals for channel estimation and easily adjusts its training overhead. A closed-form solution for IRS phase shift design is also developed to maximize spectral efficiency where the solution only requires basic linear operations. Numerical results show that SPAC and SEROM combined with the proposed IRS phase shift design achieve high spectral efficiency even with low training overhead compared to existing methods.
Wind pressure distribution on cylindrical grain storage silos
Creators: name: Sabransky, Ian James.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Ultra-broadband polarization beam splitter and rotator based on 3D-printed waveguides
Creators: name: Nesic, Aleksandar
name: Blaicher, Matthias
name: Marin-Palomo, Pablo
name: Füllner, Christoph
name: Randel, Sebastian
name: Freude, Wolfgang
name: Koos, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Multi-photon lithography has emerged as a powerful tool for photonic integration, allowing to complement planar photonic circuits by 3D-printed freeform structures such as waveguides or micro-optical elements. These structures can be fabricated with high precision on the facets of optical devices and lend themselves to highly efficient package-level chip-chip-connections in photonic assemblies. However, plain light transport and efficient coupling is far from exploiting the full geometrical design freedom that is offered by 3D laser lithography. Here, we extend the functionality of 3D-printed optical structures to manipulation of optical polarization states. We demonstrate compact ultra-broadband polarization beam splitters (PBS) that can be combined with polarization rotators (PR) and mode-field adapters into a monolithic 3D-printed structure, fabricated directly on the facets of optical devices. In a proof-of-concept experiment, we demonstrate measured polarization extinction ratios beyond 11 dB over a bandwidth of 350 nm at near-infrared (NIR) telecommunication wavelengths around 1550 nm. We demonstrate the viability of the device by receiving a 640 Gbit/s dual-polarization data signal using 16-state quadrature amplitude modulation (16QAM), without any measurable optical-signal-to-noise-ratio (OSNR) penalty compared to a commercial PBS.
description: 11 pages and 4 figures in the main part + 7 pages and 4 figures in the supplementary
An Electro-Photonic System for Accelerating Deep Neural Networks
Creators: name: Demirkiran, Cansu
name: Eris, Furkan
name: Wang, Gongyu
name: Elmhurst, Jonathan
name: Moore, Nick
name: Harris, Nicholas C.
name: Basumallik, Ayon
name: Reddi, Vijay Janapa
name: Joshi, Ajay
name: Bunandar, Darius
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: The number of parameters in deep neural networks (DNNs) is scaling at about 5$\times$ the rate of Moore's Law. To sustain this growth, photonic computing is a promising avenue, as it enables higher throughput in dominant general matrix-matrix multiplication (GEMM) operations in DNNs than their electrical counterpart. However, purely photonic systems face several challenges including lack of photonic memory and accumulation of noise. In this paper, we present an electro-photonic accelerator, ADEPT, which leverages a photonic computing unit for performing GEMM operations, a vectorized digital electronic ASIC for performing non-GEMM operations, and SRAM arrays for storing DNN parameters and activations. In contrast to prior works in photonic DNN accelerators, we adopt a system-level perspective and show that the gains while large are tempered relative to prior expectations. Our goal is to encourage architects to explore photonic technology in a more pragmatic way considering the system as a whole to understand its general applicability in accelerating today's DNNs. Our evaluation shows that ADEPT can provide, on average, 5.73$\times$ higher throughput per Watt compared to the traditional systolic arrays (SAs) in a full-system, and at least 6.8$\times$ and $2.5\times$ better throughput per Watt, compared to state-of-the-art electronic and photonic accelerators, respectively.
ServiceLernLab - Ein Lern- und Transferkonzept für (angehende) Servicetechniker im Maschinen- und Anlagenbau
Creators: name: Zinn, Bernd
name: Güzel, Emre
name: Walker, Felix
name: Nickolaus, Reinhold
name: Sari, Duygu
name: Hedrich, Matthias
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: Unternehmen im Maschinen- und Anlagenbau stehen vor dem Hintergrund der zunehmenden Bedeutung des Dienstleistungssektors und den Effekten des demografischen Wandels vor zentralen Herausforderungen in der Personalentwicklung. Sie müssen dem wachsenden Bedarf an hoch qualifizierten Servicetechnikern nachkommen - neue qualifizierte Fachkräfte für den Servicebereich gewinnen, betriebsspezifisch weiterbilden und eine systematische Sicherung zum Erhalt des spezifischen Erfahrungswissens ausscheidender Servicetechniker im Unternehmen betreiben. An der Universität Stuttgart entwickelte und erprobte das Institut für Erziehungswissenschaft ein technikdidaktisches Konzept zur Kompetenzentwicklung bzw. zum Kompetenztransfer für Servicetechniker im Maschinen- und Anlagenbau (ServiceLernLab). Transfer bezieht sich dabei einerseits auf den Transfer zwischen erfahreneren und weniger erfahrenen Personen und andererseits auf den Anspruch, das Konzept so anzulegen, dass ein Transfer der in spezifischen Anforderungssituationen erworbenen Kompetenzen auf andere Anforderungskotexte wahrscheinlicher wird. Zentrale Elemente dieses technikdidaktischen Konzepts sind zwei Schulungseinheiten: a) eine Einheit für die Kompetenzentwicklung im technischen Anforderungsbereich und b) eine Einheit zur sozialen Kompetenzentwicklung, speziell zur Perspektivenübernahme. Der Beitrag bietet (1.) eine Beschreibung der Anforderungen und Tätigkeiten von Servicetechnikern sowie Ansatzpunkte für ein innovatives Lehr-/ Lernkonzept (ServiceLernLab), (2.) eine Dokumentation der Umsetzung des ServiceLernLab bei (angehenden) Servicetechnikern des Maschinen- und Anlagenbaus und (3.) die Darstellung der erzielten Effekte des Lehr-/ Lernkonzeptes auf die Fachkompetenz (Fachwissen und Fehlerdiagnosekompetenz) sowie einen Vergleich von Selbst-, Fremdeinschätzungen und objektiven Fachkompetenzleistungen. Schlüsselwörter: Servicetechniker, Dienstleistungssektor, Lernfabrik, Fehlerdiagnosekompetenz, Erfahrungswissen
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
Monetary Policy And Exchange Rate Shock On Ethiopian Trade Balance: Using SVAR Approach
Creators: name: Abinet, Chalachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This paper investigates monetary and exchange rate policy shock on Ethiopian trade balance. Trade balance is the most important macroeconomic variable in every country due to its importance for economic growth and it is affected by monetary and exchange rate policy. To accomplish this study the researcher used Structural Vector Autoregressive model. The time series data included for the study was quarterly data starting from quarter on 1997/98 to quarter four 2012/13. The variables included under study was trade balance which is expressed as a ratio of export to import, consumption gap(foreign- domestic), consumer price index gap(foreign- domestic), reserve money and real effective exchange rate. Stationarity of time series data was tested using ADF test. To select the best lag length information criteria BIC and AIC and others were used lag two was selected as the best lag length. Johansen cointegration test was used to test the existence of long run relationship among variables. SVAR restriction approach based on theory was applied to analyze these variables. The impulse response result shows that exchange rate appreciation improves the trade balance in the short run and deteriorates in the long run which supports the J curve effect. But expansionary monetary policy does not support the existence of J curve effect rather it has cyclical pattern and it affects the trade balance through expenditure switching effect. The expansionary monetary policy dominates the exchange rate effect on explaining the Ethiopian trade balance fluctuation
Killing superalgebras for lorentzian five-manifolds
Creators: name: Beckett, Andrew
name: Figueroa-O'Farrill, José
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We calculate the relevant Spencer cohomology of the minimal Poincaré superalgebra in 5 spacetime dimensions and use it to define Killing spinors via a connection on the spinor bundle of a 5-dimensional lorentzian spin manifold. We give a definition of bosonic backgrounds in terms of this data. By imposing constraints on the curvature of the spinor connection, we recover the field equations of minimal (ungauged) 5-dimensional supergravity, but also find a set of field equations for an $\mathfrak{sp}(1)$-valued one-form which we interpret as the bosonic data of a class of rigid supersymmetric theories on curved backgrounds. We define the Killing superalgebra of bosonic backgrounds and show that their existence is implied by the field equations. The maximally supersymmetric backgrounds are characterised and their Killing superalgebras are explicitly described as filtered deformations of the Poincaré superalgebra.
description: 29 pages; LaTex errors on pages 26 and 27 fixed in v2. v3 final version to appear in JHEP
Lightlike hypersurfaces and time-minimizing geodesics in cone structures
Creators: name: Javaloyes, Miguel Ángel
name: Pendás-Recondo, Enrique
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C22, 53C50, 53C60

description: Some well-known Lorentzian concepts are transferred into the more general setting of cone structures, which provide both the causality of the spacetime and the notion of cone geodesics without making use of any metric. Lightlike hypersurfaces are defined within this framework, showing that they admit a unique folitation by cone geodesics. This property becomes crucial after proving that, in globally hyperbolic spacetimes, achronal boundaries are lightlike hypersurfaces under some restrictions, allowing one to easily obtain some time-minimization properties of cone geodesics among causal curves departing from a hypersurface of the spacetime.
description: Numbering changes to match the published version. 15 pages, 2 figures
Searching for $γ$-ray signature in WHSP blazars: Fermi-LAT detection of 150 excess signal in the 0.3-500 GeV band
Creators: name: Arsioli, Bruno
name: Chang, Yu-Ling
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A direct search of $γ$-ray emission centered on multi-frequency selected candidates is a valuable complementary approach to the standard search adopted in current $γ$-ray Fermi-LAT catalogs. Our candidates are part of the 2WHSP sample, that was assembled with the aim of providing targets for Imaging Atmospheric Cherenkov Telescopes (IACT), and is currently the largest set of high synchrotron peaked (HSP) blazars. We perform a likelihood analysis with the Fermi Science Tools using positions from 400 2WHSP blazars as seeds of tentative $γ$-ray sources. This enabled us to detect 150 $γ$-ray excess signals that have not yet been reported in previous $γ$-ray catalogs (1FGL, 2FGL, and 3FGL). By identifying new sources, we solve a fraction of the extragalactic isotropic $γ$-ray background (IGRB) composition, improving the description of the $γ$-ray sky. Our analysis considers the 0.3-500 GeV energy band, integrating over 7.2 yrs of Fermi-LAT observation and making use of the Pass 8 data release. Within the 150 2WHSPs that showed excess $γ$-ray signature: 85 are high-significance detections with test statistic (TS)$>$25, and 65 are lower-significance detections with TS between 10 to 25. We study the $γ$-ray photon spectral index distribution, the likelihood of detection according to the synchrotron peak brightness, and plot the measured $γ$-ray LogN-LogS of HSP blazars, also discussing the portion of the IGRB that has been resolved by this work. We report on four cases where we could resolve source confusion and find counterparts for unassociated 3FGL sources with the help of high-energy TS maps together with multi-frequency data. The 150 new $γ$-ray sources are named with the acronym 1BIGB for the first version of the Brazil ICRANet Gamma-ray Blazar catalog, in reference to the cooperation agreement supporting this work.
description: Accepted for publication in A&A: September 01, 2016
Learning in a Mixed Reality System in the Context of ‚Industrie 4.0‘
Creators: name: Guo, Qi
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: This contribution in the field of innovative approaches to training and education in technical subjects focuses on the potential of modern teaching and learning environments. The contribution is based on a theoretical introduction to Mixed Reality Systems and virtual teaching and learning systems, and as such provides an overview of current research regarding modern learning environments. In particular, it takes a close look at motivational effects in the context of web-based learning structures, human-object interactions, gamification and immersion. The article discusses both technical, user-relevant and pedagogical aspects as well as suggestions for further research in the context of Ausbildung 4.0. Keywords: Industry 4.0, Vocational Training 4.0, Mixed Reality System, virtual learning Acknowledgement The author would like to thank the ChinaScholarshipCouncil(CSC) for the financial support (No. 201406030091).
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
Distraction-Based Neural Networks for Document Summarization
Creators: name: Chen, Qian
name: Zhu, Xiaodan
name: Ling, Zhenhua
name: Wei, Si
name: Jiang, Hui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Distributed representation learned with neural networks has recently shown to be effective in modeling natural languages at fine granularities such as words, phrases, and even sentences. Whether and how such an approach can be extended to help model larger spans of text, e.g., documents, is intriguing, and further investigation would still be desirable. This paper aims to enhance neural network models for such a purpose. A typical problem of document-level modeling is automatic summarization, which aims to model documents in order to generate summaries. In this paper, we propose neural models to train computers not just to pay attention to specific regions and content of input documents with attention models, but also distract them to traverse between different content of a document so as to better grasp the overall meaning for summarization. Without engineering any features, we train the models on two large datasets. The models achieve the state-of-the-art performance, and they significantly benefit from the distraction modeling, particularly when input documents are long.
description: Published in IJCAI-2016: the 25th International Joint Conference on Artificial Intelligence
The effect of PMMA resins on the fusion of rigid PVC
Creators: name: Kosior, Edward I.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Economy-Wide Impacts of Export Price Changes in Ethiopia: A Recursive Dynamic Commutable General Equilibrium Analysis
Creators: name: Endalkachew, Kabtamu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Ethiopia's export is largely dominated by primary commodities characterized by a high degree of price variability. Therefore, this study investigated the economy-wide impacts of export price changes using Recursive Dynamic Computable General Equilibrium model calibrated through 2009/10 Social Accounting Matrix of Ethiopia, developed by International Food and Poverty Research Institute in collaboration with Ethiopia Development Research Institute and University of Sussex. The study reveals increase in export price appreciates domestic currency, rises import demand, but reduces export demand together that worsens Ethiopia trade balance. The increase in export price also weakens investment demand, government income and saving, the overall and sectoral economic growth. It also rises factors return and household income and welfare. Conversely, decrease in export price depreciates domestic currency, which lead to low import, but, high export demand, which in turn leads to improved trade balance. It also increases investment demand, government income and saving, and the overall economic growth. However, decrease in export price results low factors return, household income and welfare. To reduce the negative impacts of export price changes in the overall economy, it is recommended that: a) the exchange rate policy of the country should managed-floating type, b) diversification and industrialization of export sector through integrating commodity policies into the country overall development strategy, and c) harness the income gains from commodity prices to facilitate wider-economic transformations and reduction of dependence on primary commodities export.
Trajectory Planning with Deep Reinforcement Learning in High-Level Action Spaces
Creators: name: Williams, Kyle R.
name: Schlossman, Rachel
name: Whitten, Daniel
name: Ingram, Joe
name: Musuvathy, Srideep
name: Patel, Anirudh
name: Pagan, James
name: Williams, Kyle A.
name: Green, Sam
name: Mazumdar, Anirban
name: Parish, Julie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a technique for trajectory planning based on continuously parameterized high-level actions (motion primitives) of variable duration. This technique leverages deep reinforcement learning (Deep RL) to formulate a policy which is suitable for real-time implementation. There is no separation of motion primitive generation and trajectory planning: each individual short-horizon motion is formed during the Deep RL training to achieve the full-horizon objective. Effectiveness of the technique is demonstrated numerically on a well-studied trajectory generation problem and a planning problem on a known obstacle-rich map. This paper also develops a new loss function term for policy-gradient-based Deep RL, which is analogous to an anti-windup mechanism in feedback control. We demonstrate the inclusion of this new term in the underlying optimization increases the average policy return in our numerical example.
On the Tail Behaviour of Aggregated Random Variables
Creators: name: Richards, Jordan
name: Tawn, Jonathan A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In many areas of interest, modern risk assessment requires estimation of the extremal behaviour of sums of random variables. We derive the first order upper-tail behaviour of the weighted sum of bivariate random variables under weak assumptions on their marginal distributions and their copula. The extremal behaviour of the marginal variables is characterised by the generalised Pareto distribution and their extremal dependence through subclasses of the limiting representations of Ledford and Tawn (1997) and Heffernan and Tawn (2004). We find that the upper tail behaviour of the aggregate is driven by different factors dependent on the signs of the marginal shape parameters; if they are both negative, the extremal behaviour of the aggregate is determined by both marginal shape parameters and the coefficient of asymptotic independence (Ledford and Tawn, 1996); if they are both positive or have different signs, the upper-tail behaviour of the aggregate is given solely by the largest marginal shape. We also derive the aggregate upper-tail behaviour for some well known copulae which reveals further insight into the tail structure when the copula falls outside the conditions for the subclasses of the limiting dependence representations.
Struktur- und Niveaumodell des Fachwissens bei Elektronikern für Automatisierungstechnik am Ende der Ausbildung
Creators: name: Van Waveren, Leo
name: Nickolaus, Reinhold
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: In diesem Beitrag präsentieren wir Ergebnisse aus einer Untersuchung bei Elektronikern für Automatisierungstechnik, in der u.a. das Fachwissen am Ende der Ausbildung einer Analyse unterzogen wurde. Eingebettet ist diese Untersuchung in ein größeres Projekt des ASCOT Programms, in dessen Rahmen auch Modellierungen für die analytische und konstruktive Problemlösekompetenz vorgelegt wurden. Die in diesem Beitrag vorgelegten Ergebnisse dokumentieren eine mehrdimensionale Struktur des Fachwissens, die sich entlang inhaltlicher Strukturierungsmerkmale ausdifferenziert und stehen damit in Einklang mit Modellierungen des Fachwissens in anderen gewerblich-technischen Domänen. Im Anschluss an die Ergebnisse zur Struktur wird eine Niveaumodellierung vorgenommen, mit der ein transparentes Bild der erreichten Wissensstände am Ende der Ausbildung gezeichnet werden soll. Schlüsselwörter: Elektroniker für Automatisierungstechnik, Kompetenzmodellierung, Dimensionalität von Fachwissen, Strukturierung nach Inhalten, Niveaumodell
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
Finite-size effects of electron transport in PdCoO$_2$
Creators: name: Varnavides, Georgios
name: Wang, Yaxian
name: Moll, Philip J. W.
name: Anikeeva, Polina
name: Narang, Prineha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A wide range of unconventional transport phenomena have recently been observed in single-crystal delafossite metals. Here, we present a theoretical framework to elucidate electron transport using a combination of first-principles calculations and numerical modeling of the anisotropic Boltzmann transport equation. Using PdCoO$_2$ as a model system, we study different microscopic electron and phonon scattering mechanisms and establish the mean free path hierarchy of quasiparticles at different temperatures. We treat the anisotropic Fermi surface explicitly to numerically obtain experimentally-accessible transport observables, which bridge between the "diffusive", "ballistic", and "hydrodynamic" transport regime limits. We illustrate that distinction between the "quasi-ballistic", and "quasi-hydrodynamic" regimes is challenging and often needs to be quantitative in nature. From first-principles calculations, we populate the resulting transport regime plots, and demonstrate how the Fermi surface orientation adds complexity to the observed transport signatures in micro-scale devices. Our work provides key insights into microscopic interaction mechanisms on open hexagonal Fermi surfaces and establishes their connection to the macroscopic electron transport in finite-size channels.
Review on Physically Flexible Nonvolatile Memory for Internet of Everything Electronics
Creators: name: Ghoneim, Mohamed T.
name: Hussain, Muhammad M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Solid-state memory is an essential component of the digital age. With advancements in healthcare technology and the Internet of Things (IoT), the demand for ultra-dense, ultra-low-power memory is increasing. In this review, we present a comprehensive perspective on the most notable approaches to the fabrication of physically flexible memory devices. With the future goal of replacing traditional mechanical hard disks with solid-state storage devices, a fully flexible electronic system will need two basic devices: transistors and nonvolatile memory. Transistors are used for logic operations and gating memory arrays, while nonvolatile memory (NVM) devices are required for storing information in the main memory and cache storage. Since the highest density of transistors and storage structures is manifested in memories, the focus of this review is flexible NVM. Flexible NVM components are discussed in terms of their functionality, performance metrics, and reliability aspects, all of which are critical components for NVM technology to be part of mainstream consumer electronics, IoT, and advanced healthcare devices. Finally, flexible NVMs are benchmarked and future prospects are provided.
description: Electronics Journal, http://www.mdpi.com/2079-9292/4/3/424
Acoustic Power Management by Swarms of Microscopic Robots
Creators: name: Hogg, Tad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Microscopic robots in the body could harvest energy from ultrasound to provide on-board control of autonomous behaviors such as measuring and communicating diagnostic information and precisely delivering drugs. This paper evaluates the acoustic power available to micron-size robots that collect energy using pistons. Acoustic attenuation and viscous drag on the pistons are the major limitations on the available power. Frequencies around 100kHz can deliver hundreds of picowatts to a robot in low-attenuation tissue within about 10cm of transducers on the skin, but much less in high-attenuation tissue such as a lung. However, applications of microscopic robots could involve such large numbers that the robots significantly increase attenuation, thereby reducing power for robots deep in the body. This paper describes how robots can collectively manage where and when they harvest energy to mitigate this attenuation so that a swarm of a few hundred billion robots can provide tens of picowatts to each robot, on average.
Entwicklungen 4.0 - Ausblicke auf zukünftige Anforderungen an und Auswirkungen auf Arbeit und Ausbildung
Creators: name: Gebhardt, Jonas
name: Grimm, Axel
name: Neugebauer, Laura Maria
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: Wo geht es hin und wie könnte die zukünftige Arbeitswelt aussehen und wie ist darauf vorzubereiten? Technische Innovationen und Neuanordnungen, z. B. die Digitalisierung und Vernetzung von Wertschöpfungsketten, erfahren durch die Zukunftsvision „Industrie 4.0“ im zunehmenden Maße Aufmerksamkeit. Das Ziel ist ökonomischer Natur: Die Wirtschaft soll nachhaltig gestärkt werden. Parallel steigt die Notwendigkeit für Politik, Wirtschaft, Forschung und Bildung die Eingangsfragen zu beantworten. Es gilt gegenwärtige Arbeitnehmer/-innen und ihr Know-How, in Bezug auf die Arbeitsfähigkeit in der digitalisierten Arbeitswelt, herauszuzeichnen und einzuschätzen. Dieser Beitrag gestaltet eine Vorausschau auf Anforderungen an die zukünftige Arbeit 4.0 und Wirkungen auf die Aus- und Weiterbildung von Facharbeitern. Schlüsselwörter: Berufsausbildung, Zukunftsszenarien, Industrie 4.0, Digitalisierung, Kompetenzen
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
MPEC 2024-B168 : 2024 BT3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 BT3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Diffraction and interference with run-and-tumble particles
Creators: name: Maes, Christian
name: Meerts, Kasper
name: Struyve, Ward
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Run-and-tumble particles, frequently considered today for modeling bacterial locomotion, naturally appear outside a biological context as well, e.g. for producing waves in the telegraph process. Here, we use a wave function to drive their propulsion and tumbling. Such quantum-active motion realizes a jittery motion of Dirac electrons (as in the famous Zitterbewegung): the Dirac electron is a run-and-tumble particle, where the tumbling is between chiralities. We visualize the trajectories in diffraction and double slit experiments for electrons. In particular, that yields the time-of-arrival statistics of the electrons at the screen. Finally, we observe that away from pure quantum guidance, run-and-tumble particles with suitable spacetime-dependent parameters produce an interference pattern as well.
description: 25 pages, 43 figures