cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Limiting Equivalence Principle Violation and Long-Range Baryonic Force from Neutron-Antineutron Oscillation
Creators: name: Babu, K. S.
name: Mohapatra, Rabindra N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that if the baryon number violating neutron-antineutron oscillation is discovered, it would impose strong limits on the departure from Einstein's equivalence principle at a level of one part in $10^{19}$. If this departure owes its origin to the existence of long-range forces coupled to baryon number $B$ (or $B-L$), it would imply very stringent constraints on the strength of gauge bosons coupling to baryon number current. For instance, if the force mediating baryon number has strength $α_B$ and its range is larger than a megaparsec, we find the limit to be $α_B \leq 2\times 10^{-57}$, which is much stronger than all other existing bounds. For smaller range for the force, we get slightly weaker, but still stringent bounds by considering the potential of the Earth and the Sun.
description: 8 pages and one figure
Stable lattices and the diagonal group
Creators: name: Shapira, Uri
name: Weiss, Barak
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Inspired by work of McMullen, we show that any orbit of the diagonal group in the space of lattices accumulates on the set of stable lattices. As consequences, we settle a conjecture of Ramharter concerning the asymptotic behaviour of the Mordell constant, and reduce Minkowski's conjecture on products of linear forms to a geometric question, yielding two new proofs of the conjecture in dimensions up to 7.
description: This paper was part of the paper "On stable lattices and the diagonal group" (arXiv:1309.4025) which was split into three shorter papers (now all on arXiv) following the referee's request
Die Entwicklung des technischen Systemdenkens im Übergang von der Primar- zur Sekundarstufe
Creators: name: Fletcher, Stefan
name: Kleinteich, Anja
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Zusammenfassung Welche grundlegenden technischen Denkweisen im Sachunterricht erlernt werden und wie sich diese in der Sekundarstufe weiterentwickeln, ist bisher weitgehend unerforscht. Am exemplarischen technischen System Wasserkraftwerk wird in einem querschnittlichen Vergleich untersucht, wie sich das technische Systemdenken von Schüler/-innen am Ende der Primarstufe in Klasse 7 der Gesamtschule weiterentwickelt. Zur Erfassung wird in Anlehnung an die Strukturlegetechnik von D. Wahl (2013) ein neuartiges Erhebungsinstrument entwickelt. Im Ergebnis zeigt sich ein moderater Zuwachs des technischen Systemdenkens, der dem Lernzuwachs eines Schuljahres entspricht. Bei der Entwicklung des Systemdenkens im Detail zeigen sich deutliche Unterschiede bei der Anwendung in unterschiedlichen Teilgebieten und der Art der Denkprozesse. Schlüsselwörter: Technisches Systemdenken, Entwicklung, Sachunterricht ___________ The Development of Technical System Thinking in the Transition of Elementary to Secondary School Abstract Which technical way of thinking pupils basically learn in elementary schools and how this thinking develops in secondary schools are widely unresearched until now. With this in mind, we investigated pupils’ way of thinking about the technical system hydropower plant in a cross-sectional comparison of pupils at the end of elementary school in grade 4 and grade 7 in secondary school. Therefore, we develop a new test instrument based on the structure formation technique of D. Wahl (2013) to gather pupils’ way of thinking. The results show a moderate increase in pupils’ technical way of thinking comparable with the increase in knowledge of one school year. However, in detail there are significant differences in the development of system thinking for the application in different subcategories and the way of thinking. Keywords: Technical system thinking, development, general studies (Sachunterricht)
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
Prozessorientierte Analyse von konstruktiven Problemlöseprozessen auf Basis von Eye-Tracking-Aufnahmen
Creators: name: Esau, Tatiana
name: Fletcher, Stefan
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Zusammenfassung Konstruktives Problemlösen ist eine spezifische Form des Problemlösens und eine wichtige handlungsorientierte Lernmethode im allgemeinbildenden Technikunterricht. Die damit verbundenen individuellen konstruktiven Problemlösungsprozesse sind auf der Ebene von Schülerinnen und Schülern empirisch schwer zu erfassen und bisher so gut wie unerforscht. Mithilfe mobiler Eye-Tracking-Brillen lassen sich sowohl Daten über die Informationsaufnahme als auch über die ausgeführten Handlungen eines Probanden im Detail erfassen. In Anlehnung an die Informationsverarbeitende ACT-R Theorie von J. R. Anderson und unter der Berücksichtigung von Konstruktionsphasen wurde eine neue Analysemethodik entwickelt, mit der die Lösungsprozesse von 14 Schülern analysiert und die drei Lösungsstrategien: Praktisch-orientierte, theoretisch-orientierte sowie Mischstrategie qualitativ ermittelt wurden. Schlüsselwörter: Konstruieren, Problemlösen, Lösungsstrategien, Eye-Tracking-Aufnahmen ___________ Process-oriented analysis of engineering-design problem solving processes based on the eye-tracking recording Abstract Engineering-design problem solving is a specific form of problem solving and an important action-oriented learning method in technology education in general schools. The individual, engineering-design problem-solving processes at the level of pupils are empirically difficult to explore and therefore they are so far almost not researched. Using mobile eye-tracking glasses the data about the perception of information as well as the actions of a subject can be captured. Following the ACT-R theory from J. R. Anderson and considering engineering design phases, a new analytical methodology was developed. The method was used to analyze the solution processes of 14 students and qualitatively determine the three solution strategies: practical-oriented, theoretical-oriented and mixed strategy. Keywords: Engineering-design problems, problem solving, solving strategy, eye-tracking recordings
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
A User-Centered Investigation of Personal Music Tours
Creators: name: Gabbolini, Giovanni
name: Bridge, Derek
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Streaming services use recommender systems to surface the right music to users. Playlists are a popular way to present music in a list-like fashion, ie as a plain list of songs. An alternative are tours, where the songs alternate segues, which explain the connections between consecutive songs. Tours address the user need of seeking background information about songs, and are found to be superior to playlists, given the right user context. In this work, we provide, for the first time, a user-centered evaluation of two tour-generation algorithms (Greedy and Optimal) using semi-structured interviews. We assess the algorithms, we discuss attributes of the tours that the algorithms produce, we identify which attributes are desirable and which are not, and we enumerate several possible improvements to the algorithms, along with practical suggestions on how to implement the improvements. Our main findings are that Greedy generates more likeable tours than Optimal, and that three important attributes of tours are segue diversity, song arrangement and song familiarity. More generally, we provide insights into how to present music to users, which could inform the design of user-centered recommender systems.
From bad metal to Kondo insulator: temperature evolution of the optical properties of SmB$_{6}$
Creators: name: Tytarenko, A.
name: Nakatsukasa, K.
name: Huang, Y. K.
name: Johnston, S.
name: van Heumen, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The recent rekindling of interest in the mixed valent Kondo insulator SmB$_{6}$ as candidate for a first correlated topological insulator has resulted in a wealth of new experimental observations. In particular, angle-resolved photoemission experiments have provided completely new insights into the formation of the low temperature Kondo insulating state starting from the high temperature correlated metal. Here, we report detailed temperature and energy dependent measurements of the optical constants of SmB$_6$ in order to provide a detailed study from the point of view of a bulk sensitive spectroscopic probe. We detect a previously unobserved infrared active optical phonon mode, involving the movement of the Sm ions against the boron cages. The changes taking place in the free carrier response with temperature and their connection to changes in optical transitions between different bands are discussed. We find that the free charge density starts to decrease rapidly below approximately 200 K. Below 60 K a small amount of spectral weight begins to accumulate in low lying interband transitions, indicating the formation of the Kondo insulating state; however, the total integrated spectral weight in our experimental window ($\sim 4.35$ eV) decreases. This indicates the involvement of a large Coulomb interaction ($>$ 5 eV) in the formation of the Kondo insulator.
description: 10 pages, 7 figures (including supp.). Accepted for publication in New Journal of Physics
Dynamical Quantum Phase Transitions in Spin Chains with Long-Range Interactions: Merging different concepts of non-equilibrium criticality
Creators: name: Zunkovic, Bojan
name: Heyl, Markus
name: Knap, Michael
name: Silva, Alessandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically study the dynamics of a transverse-field Ising chain with power-law decaying interactions characterized by an exponent $α$, which can be experimentally realized in ion traps. We focus on two classes of emergent dynamical critical phenomena following a quantum quench from a ferromagnetic initial state: The first one manifests in the time averaged order parameter, which vanishes at a critical transverse field. We argue that such a transition occurs only for long-range interactions $α\leq 2$ . The second class corresponds to the emergence of time-periodic singularities in the return probability to the ground state manifold (a.k.a. Loschmidt echo) which is obtained for all values of $α$ and agrees with the order parameter transition for $α\leq 2$. We characterize how the two classes of nonequilibrium criticality correspond to each other and give a physical interpretation based on the symmetry of the time-evolved quantum states.
description: 4+13 pages, 4+13 figures
Subjektorientierte Gestaltung von Unterrichtsprozessen in der dualen Berufsausbildung - zur iterativen Weiterentwicklung der Designbasierten Didaktik auf der Basis eines innovationsorientierten Forschungsdesigns
Creators: name: Diezemann, Eckart
name: Schäfer, Markus
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Zusammenfassung Das Erkenntnisinteresse des Design-Based Research Projekts fokussiert den Zusammenhang von Subjektentwicklungsprozessen und designbasierter Didaktik im Rahmen der dualen beruflichen Erstausbildung zur Kfz-Mechatronikerin bzw. zum Kfz-Mechatroniker. Der DBR-Ansatz wurde gewählt, weil er u. A. die Möglichkeit bietet, ein entwicklungs- und innovationsorientiertes Forschungsdesign zu implementieren. Der Vorteil der Verwendung des DBR-Ansatzes besteht für das vorliegende Forschungsvorhaben zudem darin, dass die Komplexität des Untersuchungskontextes in den Experimenten (Feld und Untersuchungsgegenstand) berücksichtigt werden kann. Im Beitrag werden zunächst die methodologischen und forschungsmethodischen Fragen erörtert, bevor das designbasierte Didaktische Konzept als Forschungsgegenstand, die Forschungsfragen und das konkrete Forschungsdesign beschrieben werden. Abschließend werden der Forschungsverlauf und vorliegende (Zwischen-) Ergebnisse vorgestellt. Schlüsselwörter: Design-Based Research, Designbasierte Didaktik, Subjektentwicklung, kfz4me, KFZ-Mechatronik, MediKo-Matrix __________ Subject-centered layout of education processes within dual VET - advancement of the design based didactic concept on the basis of a Design Based Research Abstract The cognitive interest of this Design-Based Research (DBR) project is to explicate in how far subject development within the scope of the dual VET (automotive mechatronics fitters/KFZ MechatrinikerIn) can be supported through the advancement of a design-based didactic concept. The developmental component of the DBR project focusses the development, implementation, and evaluation of various didactic scenarios which aim at optimising the interconnection of theory and practice. The incentive behind choosing a DBR approach is based on the possibility to implement an innovation-oriented research design. Therefore, the benefit of using the DBR approach consists in the possibility to consider the complexity of the study context (field and object). In the article, the methodological frame of reference will initially be discussed before the design-based didactic concept as a research object, the research question, and the research design in concrete terms are described. Finally, the course of research and, if applicable, (interim) results will be analysed. Keywords: Design-Based Research, automotive/car mechatronic fitters, design-based didactic concept, subject development, kfz4me.de, MediKo-Matrix
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
Inferring individual attributes from search engine queries and auxiliary information
Creators: name: Soldaini, Luca
name: Yom-Tov, Elad
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Internet data has surfaced as a primary source for investigation of different aspects of human behavior. A crucial step in such studies is finding a suitable cohort (i.e., a set of users) that shares a common trait of interest to researchers. However, direct identification of users sharing this trait is often impossible, as the data available to researchers is usually anonymized to preserve user privacy. To facilitate research on specific topics of interest, especially in medicine, we introduce an algorithm for identifying a trait of interest in anonymous users. We illustrate how a small set of labeled examples, together with statistical information about the entire population, can be aggregated to obtain labels on unseen examples. We validate our approach using labeled data from the political domain. We provide two applications of the proposed algorithm to the medical domain. In the first, we demonstrate how to identify users whose search patterns indicate they might be suffering from certain types of cancer. In the second, we detail an algorithm to predict the distribution of diseases given their incidence in a subset of the population at study, making it possible to predict disease spread from partial epidemiological data.
Deep Reinforcement Learning for RIS-aided Multiuser Full-Duplex Secure Communications with Hardware Impairments
Creators: name: Peng, Zhangjie
name: Zhang, Zhibo
name: Kong, Lei
name: Pan, Cunhua
name: Li, Li
name: Wang, Jiangzhou
Publisher: name: arXiv
Year: 2022
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, we investigate a reconfigurable intelligent surface (RIS)-aided multiuser full-duplex secure communication system with hardware impairments at transceivers and RIS, where multiple eavesdroppers overhear the two-way transmitted signals simultaneously, and an RIS is applied to enhance the secrecy performance. Aiming at maximizing the sum secrecy rate (SSR), a joint optimization problem of the transmit beamforming at the base station (BS) and the reflecting beamforming at the RIS is formulated under the transmit power constraint of the BS and the unit modulus constraint of the phase shifters. As the environment is time-varying and the system is high-dimensional, this non-convex optimization problem is mathematically intractable. A deep reinforcement learning (DRL)-based algorithm is explored to obtain the satisfactory solution by repeatedly interacting with and learning from the dynamic environment. Extensive simulation results illustrate that the DRL-based secure beamforming algorithm is proved to be significantly effective in improving the SSR. It is also found that the performance of the DRL-based method can be greatly improved and the convergence speed of neural network can be accelerated with appropriate neural network parameters.
description: 16pages,14 figures, accepted by IEEE Internet of Things Journal
title: Software Product Management: from opinions to data-driven experimentation
Creators: name: Bosch, Jan
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Software Product Management
subject: experiments
subject: data-driven

description: With the digitalization of industry and society, product management of digital technologies such as software, data and AI is rapidly becoming critically important. Digitalization offers new tools for product managers to increase the return on investment of R&D including DevOps, DataOps and MLOps. These fast feedback loops allow product managers to adopt a much more experiment- and data-driven approach, e.g. using A/B testing and other experimental approaches. Product management is at the transition point from “what to build” to “what outcomes to accomplish”. The keynote addresses this transformation, the challenges that one has to address while transitioning, the benefits as well as the new techniques available. The talk will share numerous examples from industry based on our research in the context of Software Center (www.software-center.se), a collaboration between 15 international companies and 5 Swedish universities focused on accelerating the digital transformation of the European software intensive industry.
Pilotierung eines Fragebogens zur Erhebung des Technischen Selbstkonzepts von durchschnittlich Neunjährigen
Creators: name: Adenstedt, Victoria
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Zusammenfassung Dieser Beitrag befasst sich mit dem Technischen Selbstkonzept von Grundschülern und Grundschülerinnen zum Gegenstandsbereich Technik. Im Fokus steht die Erprobung und Pilotierung eines Fragebogens zur Erfassung des Technisch-Akademischen Selbstkonzepts von durchschnittlich Neunjährigen. Das Instrument umfasst dabei 3 Subkonstrukte: Selbsteinschätzung, Fähigkeitskonzept und Selbstbild & Selbstbewertung. An der Pilotierungsstudie beteiligten sich N = 49 Schüler und Schülerinnen einer Grundschule in Nordrhein-Westfalen. Die Ergebnisse sollen Aufschlüsse über die Validität des Instruments geben. Schlüsselwörter: technisches Selbstkonzept, Technische Bildung, Primarstufe, PilotierungsÂ­studie, Messinstrument ___________ Piloting of a questionnaire to measure the technical self-concept of an average nine-year-olds Abstract This article deals with the technical self-concept of primary school pupils in the field of technology. The focus is on the testing and piloting of a questionnaire to measure the technicalacademic self-concept of average nine-year-olds. The instrument consists of 3 subconstructions: self-assessment, skills concept and self-evaluation & self-perception. N = 49 pupils from a primary school in North Rhine-Westphalia took part in the pilot study. The results should provide information on the validity of the instrument. Keywords: technological self-concept, technology education, primary school, pilot study, measuring instrument
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
Extended MHD turbulence and its applications to the solar wind
Creators: name: Abdelhamid, Hamdi M.
name: Lingam, Manasvi
name: Mahajan, Swadesh M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Extended MHD is a one-fluid model that incorporates two-fluid effects such as electron inertia and the Hall drift. This model is used to construct fully nonlinear Alfvénic wave solutions, and thereby derive the kinetic and magnetic spectra by resorting to a Kolmogorov-like hypothesis based on the constant cascading rates of the energy and generalized helicities of this model. The magnetic and kinetic spectra are derived in the ideal $\left(k < 1/λ_i\right)$, Hall $\left(1/λ_i < k < 1/λ_e \right)$, and electron inertia $\left(k > 1/λ_e\right)$ regimes; $k$ is the wavenumber and $λ_s = c/ω_{p s}$ is the skin depth of species `$s$'. In the Hall regime, it is shown that the emergent results are fully consistent with previous numerical and analytical studies, especially in the context of the solar wind. The focus is primarily on the electron inertia regime, where magnetic energy spectra with power-law indexes of $-11/3$ and $-13/3$ are always recovered. The latter, in particular, is quite close to recent observational evidence from the solar wind with a potential slope of approximately $-4$ in this regime. It is thus plausible that these spectra may constitute a part of the (extended) inertial range, as opposed to the standard `dissipation' range paradigm.
description: 15 pages; 4 figures; accepted for publication in ApJ (2016)
title: What Got You Here Won’t Get You There. A multi-case study on the challenges in the transition from traditional towards continuous data practices in the embedded systems domain
Creators: name: Olsson, Helena
name: Bosch, Jan
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Digitalization
subject: digital transformation
subject: data practices
subject: continuous practices
subject: continuous customer value delivery.

description: For decades, product data has been collected and used for quality assurance, for post-deployment defect detection and for informing the next generation of products. Across industry domains, and with the online domain leading the way, companies have adopted experimentation and data driven practices such as A/B testing to evaluate product performance, customer behaviors and for determining what adds value to customers. However, with the rapid changes that new digital technologies bring, companies are moving towards continuous value delivery and monetization models in which they offer their products as-a-service or offer services to complement and extend their existing products. In this transition, the traditional way of post-deployment data collection and use is no longer sufficient. While companies realize this, they experience difficulties in making the changes they need to transition towards continuous practices and new ways of working with data. As a result, companies risk wasting development efforts on functionality that have little or no customer value and they lose out on the competitive advantages that come with insights derived from continuous collection and use of data. In this paper, we explore the challenges companies experience in the transition from traditional towards continuous practices and the implications this shift has on their ways of working with data.
Large-scale deformed quasiparticle random-phase approximation calculations of the $γ$-ray strength function using the Gogny force
Creators: name: Martini, M.
name: Péru, S.
name: Hilaire, S.
name: Goriely, S.
name: Lechaftois, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Valuable theoretical predictions of nuclear dipole excitations in the whole chart are of great interest for different nuclear applications, including in particular nuclear astrophysics. Here we present large-scale calculations of the $E1$ $γ$-ray strength function obtained in the framework of the axially-symmetric deformed QRPA based on the finite-range Gogny force. This approach is applied to even-even nuclei, the strength function for odd nuclei being derived by interpolation. The convergence with respect to the adopted number of harmonic oscillator shells and the cut-off energy introduced in the 2-quasiparticle (2-$qp$) excitation space is analyzed. The calculations performed with two different Gogny interactions, namely D1S and D1M, are compared. A systematic energy shift of the $E1$ strength is found for D1M relative to D1S, leading to a lower energy centroid and a smaller energy-weighted sum rule for D1M. When comparing with experimental photoabsorption data, the Gogny-QRPA predictions are found to overestimate the giant dipole energy by typically $\sim$2 MeV. Despite the microscopic nature of our self-consistent Hartree-Fock-Bogoliubov plus QRPA calculation, some phenomenological corrections need to be included to take into account the effects beyond the standard 2-$qp$ QRPA excitations and the coupling between the single-particle and low-lying collective phonon degrees of freedom. For this purpose, three prescriptions of folding procedure are considered and adjusted to reproduce experimental photoabsorption data at best. All of them are shown to lead to rather similar predictions of the $E1$ strength, both at low energies and for exotic neutron-rich nuclei. Predictions of $γ$-ray strength functions and Maxwellian-averaged neutron capture rates for the whole Sn isotopic chain are also discussed and compared with previous theoretical calculations.
A microprocessor controller for anaesthesia and respiration
Creators: name: Percy, Michael Norman.
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.
Collisional heating of icy planetesimals. I. Catastrophic collisions
Creators: name: Davidsson, Björn J. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Planetesimals in the primordial disc may have experienced a collisional cascade. If so, the comet nuclei later placed in the Kuiper belt, scattered disc, and Oort Cloud would primarily be fragments and collisional rubble piles from that cascade. However, the heating associated with the collisions cannot have been strong enough to remove the hypervolatiles that are trapped within more durable ices, because comet nuclei are rich in hypervolatiles. This places constraints on the diameter of the largest bodies allowed to participate in collisional cascades, and limits the primordial disc lifetime or population size. In this paper, the thermophysical code NIMBUS is used to study the thermal evolution of planetesimals before, during, and after catastrophic collisions. The loss of CO during segregation of $\mathrm{CO_2:CO}$ mixtures and during crystallisation of amorphous $\mathrm{H_2O}$ is calculated, as well as mobilisation and internal relocation of $\mathrm{CO_2}$. If an amorphous $\mathrm{H_2O}$ host existed, and was protected by a $\mathrm{CO_2:CO}$ heat sink, only diameter $D<20\,\mathrm{km}$ (inner disc) and $D<64\,\mathrm{km}$ (outer disc) bodies could have been involved in a collisional cascade. If $\mathrm{CO_2}$ was the only CO host, the critical diameters drop to $D<20$-$32\mathrm{km}$. Avoiding disruption of larger bodies requires a primordial disc lifetime of $<9\,\mathrm{Myr}$ at $15\,\mathrm{au}$ and $<50$-$70\,\mathrm{Myr}$ at $30\,\mathrm{au}$. Alternatively, if a $450\,\mathrm{Myr}$ disc lifetime is required to associate the primordial disc disruption with the Late Heavy Bombardment, the disc population size must have been 6-60 times below current estimates.
description: 20 pages, 11 figures. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review
title: Product Ops: Understanding and Defining an Emerging Discipline
Creators: name: Moroz, Bogdan
name: Saltan, Andrey
name: Hyrynsalmi, Sami
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Software Product Management
subject: Product Ops
subject: Software Business Definition
subject: Grey Literature Review

description: Product Operations (Product Ops) is a concept gaining momentum among product management practitioners in the software domain. Practitioners share success stories and describe various benefits of implementing Product Ops in software organizations. However, there is a lack of consensus on a definition and areas of responsibility of the role, which may lead to inconsistencies and flaws in its implementation. An abundance of practitioner publications on the subject with varying descriptions of the discipline calls for standardization and the development of a systematic approach to discussing Product Ops. Moreover, only a handful of academic publications have briefly touched upon this concept. In response to this research gap, the paper reports the results of a grey literature review and proposes a definition of the Product Ops concept emerging in the software product management practitioner literature. The tasks and responsibilities of the function are described, alongside the expected positive outcomes of implementing the Product Ops. The risks of flawed implementations are also acknowledged. Furthermore, the paper outlines potential avenues for future research in this domain.
Editorial
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Am 23. und 24. November 2017 fand im Artur-Woll Haus der UniversitaÌˆt Siegen das 2. Technikdidaktik-Symposium des JOTED statt. Für uns, die Herausgeber des JOTED und gleichzeitig die Veranstalter des Symposiums, war diese Tagung im Vergleich zum 1. Symposium 2016 noch spannender, denn nun ging es nicht um ein einmaliges „Come Together“, sondern um die Etablierung eines Formats. Die Idee zur WeiterfuÌˆhrung des Technikdidaktik-Symposiums war in Gesprächen auf dem 1. Symposium sowie dessen Nachbereitung im Rahmen einer Redaktionssitzung der Zeitschrift „JOTED“ entstanden. Die neue Vision war dann, dass das Symposium im einjährigen Turnus als spezifische Ergänzung zu bestehenden Tagungsformaten unterschiedlicher Fachdisziplinen und -communities interdisziplinär Interessierten als Knotenpunkt für die wissenschaftliche Diskussion sowie den Austausch zu den vielfältigen Aspekten des technischen Lehrens und Lernens dienen sollte. Daher waren wir zunächst beruhigt, als im Vorfeld der Veranstaltung viele dem Call for Papers folgten. Insgesamt wurden fast doppelt so viele Vorträge eingereicht, wie dann tatsächlich in die Tagung eingebunden werden konnten. Um den vielen interessanten Forschungsfacetten gerecht werden zu können, implementierten wir zusätzlich zum Vortragsprogramm ein Poster-Format. Ebenfalls deutlich erhöht hatten sich die Anmeldezahlen, so dass wir sicher sein konnten, die Vorträge in einem 2-zügigen Tagungsablauf angemessen füllen zu können.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
Topological phase in oxidized zigzag stanene nanoribbons
Creators: name: Modarresi, M.
name: Kuang, W. B.
name: Kaloni, T. P.
name: Roknabadi, M. R.
name: Schreckenbach, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: First-principles and semi-empirical tight binding calculations were performed to understand the adsorption of oxygen on the surface of two dimensional (2D) and zigzag stanene nano-ribbons. The intrinsic spin-orbit interaction is considered in the Kane-Mele tight binding model. The adsorption of an oxygen atom or molecule on the 2D stanene opens an electronic energy band gap. We investigate the helical edge states and topological phase in the pure zigzag stanene nano-ribbons. The adsorption of oxygen atoms on the zigzag stanene nano-ribbons deforms the helical edge states at the Fermi level which causes topological (non-trivial) to trivial phase transition. The structural stability of the systems is checked by performing $Γ$-point phonon calculations. The adsorption of an oxygen atom or molecule on the 2D staneneSpecific arrangements of adsorbed oxygen atoms on the surface of zigzag stanene nano-ribbons conserve the topological phase which has potential applications in future nano-electronic devices.
description: 15 pages, 7 figures, and 1 Table
title: Framework für Geschäftsmodelle von Unternehmenssoftwareplattformen
Creators: name: Pietzker, Marcus
name: Schönhofen, Felix
name: Herzwurm, Georg
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Softwareplattformen
subject: Unternehmenssoftware
subject: Geschäftsmodelle

description: Megatrends like Digitization, Globalization and Customer Empowerment drive companies in the IT Industry to constantly change their business models. In particular, the term “Software Platforms” is still gaining significance in this context. This contribution suggests a fromwork for exploring business models of software platforms for enterprise software. This framework could then represent the basis for an industry comparision and a first step towards the formulation of practical recommendations.
Editorial
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: From November 23 to November 24, 2017, the second symposium on technical teaching and learning organized by the editors of the Journal of Technical Education (JOTED) and hosted by the University of Siegen took place in the Artur-Woll House. As JOTED editors and event organizers, this symposium was even more exciting to us than the first one in 2016: Rather than simply coming together for a one-time event as in 2016, this symposium was about establishing a format. The idea of continuing the symposium originated from conversations we had at the first symposium and from its wrap-up in the aftermath when we held an editorial board meeting for JOTED. It was in that meeting that a new vision was born: We intended to turn the symposium as a one-time event into an annual series so that it would add to the discipline-specific conference formats already in place. By facilitating contact points for cross-disciplinary researchers, we intended the symposium to propel scientific discussions and exchange on the diverse aspects of technical teaching and learning. We were therefore relieved about the many responses to our call for papers. In total, we had received twice as many abstracts as we could accept for the symposium. In order to meet the demand and do justice to a whole range of interesting research foci, we decided to implement a new poster-format in addition to the presentation program. As the number of registrations had doubled, too, we were sure that concurrent conference lines would help us to live up to these numbers.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
title: Perception of Social Costs of Digitalization: Profiling Top Managers, Middle Managers, and Front-line Employees
Creators: name: Bogodistov, Yevgen
name: Schwaiger, Antonia
name: Beimborn, Daniel
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Digitalization
subject: Profiling
subject: Discrete Choice Experiment
subject: Social Costs
subject: Software Solutions Perception

description: Although information technology has become advanced in profiling users, we often offer this knowledge to marketing and forget that profiling is needed for information technology implementation itself. If digitalization is introduced in a firm, it may encounter internal resistance. Top managers, middle managers, and front-line employees may have different expectations with regard to digitalization initiatives in their firms. Having different visions of what digitalization is about may result in conflicts with regard to digital solutions selection and implementation and, consequently, lead to digitalization failure. In this paper, we look at differences in digitalization cost perception using a Discrete Choice Experiment. Based on our findings, we propose to approach firms by profiling top managers, middle managers, and front-line employees.
EXTENT: Enabling Approximation-Oriented Energy Efficient STT-RAM Write Circuit
Creators: name: Seyedfaraji, Saeed
name: Daryani, Javad Talafy
name: Aly, Mohamed M. Sabry
name: Rehman, Semeen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Spin Transfer Torque Random Access Memory (STT-RAM) has garnered interest due to its various characteristics such as non-volatility, low leakage power, high density. Its magnetic properties have a vital role in STT switching operations through thermal effectiveness. A key challenge for STT-RAM in industrial adaptation is the high write energy and latency. In this paper, we overcome this challenge by exploiting the stochastic switching activity of STT-RAM cells and, in tandem, with circuit-level approximation. We enforce the robustness of our technique by analyzing the vulnerability of write operation against radiation-induced soft errors and applying a low-cost improvement. Due to serious reliability challenges in nanometer-scale technology, the robustness of the proposed circuit is also analyzed in the presence of CMOS and magnetic tunnel junction (MTJ) process variation. Compared to the state-of-the-art, we achieved 33.04% and 5.47% lower STT-RAM write energy and latency, respectively, with a 3.7% area overhead, for memory-centric applications.
Discovery of a novel 112-type iron-pnictide and La-doping induced superconductivity in Eu1-xLaxFeAs2 (x = 0 ~ 0.15)
Creators: name: Yu, Jia
name: Liu, Tong
name: Pan, Bo-Jin
name: Ruan, Bin-Bin
name: Wang, Xiao-Chuan
name: Mu, Qing-Ge
name: Zhao, Kang
name: Chen, Gen-Fu
name: Ren, Zhi-An
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with La-doping induced superconductivity in a series of Eu1-xLaxFeAs2. The polycrystalline samples were synthesized through solid state reaction method only within a very narrow temperature window around 1073 K. Small single crystals were also grown from a flux method with the size about 100 um. The crystal structure was identified by single crystal X-ray diffraction analysis as a monoclinic structure with space group of P21/m. From resistivity and magnetic susceptibility measurements, we found that the parent compound EuFeAs2 shows a Fe2+ related antiferromagnetic/structural phase transition near 110 K and a Eu2+ related antiferromagnetic phase transition near 40 K. La doping suppressed the both phase transitions and induced superconducting transition with a Tc ~ 11 K for Eu0.85La0.15FeAs2.
title: A competency model for the Product Management in Software-intensive Business
Creators: name: Wagner, Katharina
name: Schönhofen, Felix
name: Herzwurm, Georg
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Software-intensive Business
subject: competency model
subject: product management
subject: software product management

description: As digitization continues, nearly all industries have become software-developing entities. The distinction between software companies and the manufacturing industry is becoming increasingly blurred. This poses major challenges, especially for the product management of companies. Once un-disputed competencies of a company are threatening to become irrelevant, while others are becoming more significant. This contribution takes this development into account, by examining the influence of the Software-intensive Business on the necessary enterprise competencies and deriving a competency model from it. This competency model forms the basis for a competency matrix that allows practitioners to measure the specific competencies of their enterprise and can provide implications for their improvement. The competency model and the competency matrix were evaluated by experts from several industries in terms of relevance and applicability.
title: Theory vs. Practice of Product Portfolio Management – views from real life of a major corporation
Creators: name: Sickinger, Patrizia
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Product Portfolio Management
subject: Major Corporations
subject: Agile Management

description: Have you ever discussed the topic of necessarity having a comprehensive portfolio Management for classical IT products, -services and –solutions? Or still more: Implementing that task? This is the mission that Patrizia and her staff have been working on since end of 2021 – during Corona, big organizational changes and new working models like agile, scrum or right now SAFe. And not only are they working on conceptual tasks, but also implementation and future operation, additionally Marketing for the products and starting to build up more quality in their processes. This presentation shows why and how they want to do this, where there are still issues and how they try to change this: tackling the challenges to change an old traditional automotive company into a very modern innovative data-driven automotive software enterprise.
Die Fachkompetenzstruktur von Technikern für Elektrotechnik und Einflussfaktoren auf ihre Kompetenzentwicklung
Creators: name: Velten, Stefanie
name: Nitzschke, Alexander
name: Nickolaus, Reinhold
name: Walker, Felix
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Zusammenfassung Im Beitrag wird die Fachkompetenzstruktur bei angehenden Technikernam Ende ihrer zweijährigen Fortbildung sowie mögliche Einflussfaktoren auf die Fachkompetenz untersucht. Die Ergebnisse replizieren die bereits bei Auszubildenden am Ende der Ausbildung festgestellte dreidimensionale Grundstruktur des Fachwissens, wobei die Dimensionen höher miteinander korrelieren. Auch gelingt es die fachliche Problemlösefähigkeit durch eine Kombination komplexer und minimalkomplexer Aufgaben reliabel zu erfassen. Als zentrale Einflussfaktoren auf die Ausprägung des Fachwissens am Ende der Fortbildung erweist sich das fachliche Vorwissen und indirekt die kognitiven Grundfähigkeiten. Die fachspezifische Problemlösefähigkeit wird insbesondere durch das Fachwissen und die Arbeitserfahrungen erklärt. Schlüsselwörter: Fachkompetenz, Fachwissen, berufliche Fortbildung, Strukturmodellierung, fachspezifische Problemlösefähigkeit _________________ The structure of vocational competencies of technicians in electronics and determinants for their competence development Abstract This paper addresses the structure of vocational competencies in prospective technicians at the end of their two-year post-secondary training as well as possible factors influencing their vocational competencies. The results replicate a three-dimensional structure of vocational knowledge yet found in apprentices at the end of their apprenticeship. However, knowledge dimensions stronger correlate. Additionally, we succeed in reliably assessing domain-specific problem-solving by combining complex and less complex problem-solving tasks. Key determinants influencing vocational knowledge at the end of the post-secondary training are prior vocational knowledge and indirectly cognitive skills. Domain-specific problem-solving skills are mainly explained by the vocational knowledge and work experiences. Keywords: vocational competency, vocational knowledge, post-secondary VET, knowledge structure, domain-specific problem-solving skills
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 1 (2018): Journal of Technical Education (JOTED)
Multi-Pair D2D Communications Aided by An Active RIS over Spatially Correlated Channels with Phase Noise
Creators: name: Peng, Zhangjie
name: Liu, Xue
name: Pan, Cunhua
name: Li, Li
name: Wang, Jiangzhou
Publisher: name: arXiv
Year: 2022
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: This paper investigates a multi-pair device-to-device (D2D) communication system aided by an active reconfigurable intelligent surface (RIS) with phase noise and direct link. The approximate closed-form expression of the ergodic sum rate is derived over spatially correlated Rician fading channels with statistical channel state information (CSI). When the Rician factors go to infinity, the asymptotic expressions of the ergodic sum rates are presented to give insights in poor scattering environment. The power scaling law for the special case of a single D2D pair is presented without phase noise under uncorrelated Rician fading condition. Then, to solve the ergodic sum rate maximization problem, a method based on genetic algorithm (GA) is proposed for joint power control and discrete phase shifts optimization. Simulation results verify the accuracy of our derivations, and also show that the active RIS outperforms the passive RIS.
description: Accepted by IEEE Wireless Communications Letters. Keywords: Reconfigurable intelligent surface (RIS), intelligent reflecting surface (IRS), Active RIS