cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the energy dissipation rate at the inner edge of circumbinary discs
Creators: name: Terquem, Caroline
name: Papaloizou, John C. B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study, by means of numerical simulations and analysis, the details of the accretion process from a disc onto a binary system. We show that energy is dissipated at the edge of a circumbinary disc and this is associated with the tidal torque that maintains the cavity: angular momentum is transferred from the binary to the disc through the action of compressional shocks and viscous friction. These shocks can be viewed as being produced by fluid elements which drift into the cavity and, before being accreted, are accelerated onto trajectories that send them back to impact the disc. The rate of energy dissipation is approximately equal to the product of potential energy per unit mass at the disc's inner edge and the accretion rate, estimated from the disc parameters just beyond the cavity edge, that would occur without the binary. For very thin discs, the actual accretion rate onto the binary may be significantly less. We calculate the energy emitted by a circumbinary disc taking into account energy dissipation at the inner edge and also irradiation arising there from reprocessing of light from the stars. We find that, for tight PMS binaries, the SED is dominated by emission from the inner edge at wavelengths between 1-4 and 10 $μ$m. This may apply to systems like CoRoT 223992193 and V1481 Ori.
description: 14 pages, 11 figures, accepted for publication in MNRAS
Traffic Analytics Development Kits (TADK): Enable Real-Time AI Inference in Networking Apps
Creators: name: Qiu, Kun
name: Chang, Harry
name: Wang, Ying
name: Yu, Xiahui
name: Zhu, Wenjun
name: Liu, Yingqi
name: Ma, Jianwei
name: Li, Weigang
name: Liu, Xiaobo
name: Dai, Shuo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Sophisticated traffic analytics, such as the encrypted traffic analytics and unknown malware detection, emphasizes the need for advanced methods to analyze the network traffic. Traditional methods of using fixed patterns, signature matching, and rules to detect known patterns in network traffic are being replaced with AI (Artificial Intelligence) driven algorithms. However, the absence of a high-performance AI networking-specific framework makes deploying real-time AI-based processing within networking workloads impossible. In this paper, we describe the design of Traffic Analytics Development Kits (TADK), an industry-standard framework specific for AI-based networking workloads processing. TADK can provide real-time AI-based networking workload processing in networking equipment from the data center out to the edge without the need for specialized hardware (e.g., GPUs, Neural Processing Unit, and so on). We have deployed TADK in commodity WAF and 5G UPF, and the evaluation result shows that TADK can achieve a throughput up to 35.3Gbps per core on traffic feature extraction, 6.5Gbps per core on traffic classification, and can decrease SQLi/XSS detection down to 4.5us per request with higher accuracy than fixed pattern solution.
description: Published in: 2022 Thirteenth International Conference on Ubiquitous and Future Networks (ICUFN)
Interkulturelle und sozial verantwortliche Technikbildung - Die Ingenieure ohne Grenzen Challenge
Creators: name: Schönefeld, Kathrin
name: Frye, Silke
name: Haertel, Tobias
name: Willicks, Freya
name: Hees, Frank
Publisher: name: Journal of Technical Education (JOTED)
Year: 2019

description: Nachhaltigkeit, Globalisierung und soziale Verantwortung bestimmen zunehmend die Gesellschaft. In technischen Studiengängen fehlen aber oft Lehr-Lernszenarien, die diese Themenbereiche explizit als Lernziele adressieren. Der Beitrag zeigt, wie Lehrende durch die Einbindung der „Ingenieure ohne Grenzen Challenge“ (IoGC) in ihren Lehrveranstaltungen „Sustainable Development Goals“ adressieren und Themen aus der Entwicklungszusammenarbeit praktisch, kreativ und kompetenzförderlich umsetzen können. Für die Evaluation wurde ein standardisierter Fragebogen entwickelt, der für eine Vor- und Nachbefragung der Studierenden eingesetzt wird. Es kann so gezeigt werden, wie die IoGC die Motivation der Studierenden fördert und sie ein Bewusstsein für soziale und globale Verantwortungen entwickeln.
description: Journal of Technical Education (JOTED), Bd. 7 Nr. 1 (2019): Journal of Technical Education (JOTED)
Electrochemical oxidation of Victorian brown coal
Creators: name: Everson, John Andrew.
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.
Using archival sources to identify battlefield sites and the fates of the missing: The First Battle of Bullecourt 1917 as a case history
Creators: name: Brooks, Brenton J
Publisher: name: British Journal for Military History
Year: 2025

description: The First Battle of Bullecourt took place in April 1917 and two study cases of the Australian missing from that event have been investigated. Firstly, the fate of Captain Allan Edwin Leane, and secondly the fate of an unaccounted group of wounded last seen in a German dugout. Australian and German unit diaries were used in conjunction with mapping and aerial photography to determine what happened and where.
description: British Journal for Military History, Vol. 11 No. 1 (2025): British Journal for Military History
RESISTIRE factsheet: Access to health services for vulnerable groups
Creators: name: Kolasinska, Agnieszka
name: Cibin, Roberto
name: Linkova, Marcela
name: Bobek, Alicja
name: Wuiame, Nathalie
Publisher: name: Zenodo
Year: 2023
Subjects: gender+
COVID-19
Inequalities
Healthcare
Vulnerable groups

description: The COVID-19 pandemic caused huge backlogs and delays in healthcare, further worsening the situation of already vulnerable groups (e.g. migrants, ethnic minorities, people with disabilities, homeless people). The interruption of services that were not considered essential (e.g. sexual and reproductive healthcare, rehabilitation, addiction treatment) took a tremendous toll on marginalised groups and communities. The lack of data on the health and wellbeing of people living outside the healthcare system is likely to result in a gross underestimation of the scale of the problem of unmet medical needs during and following the pandemic. In order to address systemic inequalities in healthcare, it is imperative to identify and recognise the categories of patients whose medical needs are most likely to be put on hold in times of crisis.
Inhale: Enabling High-Performance and Energy-Efficient In-SRAM Cryptographic Hash for IoT
Creators: name: Zhang, Jingyao
name: Sadredini, Elaheh
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences
subject: 68Mxx

description: In the age of big data, information security has become a major issue of debate, especially with the rise of the Internet of Things (IoT), where attackers can effortlessly obtain physical access to edge devices. The hash algorithm is the current foundation for data integrity and authentication. However, it is challenging to provide a high-performance, high-throughput, and energy-efficient solution on resource-constrained edge devices. In this paper, we propose Inhale, an in-SRAM architecture to effectively compute hash algorithms with innovative data alignment and efficient read/write strategies to implicitly execute data shift operations through the in-situ controller. We present two variations of Inhale: Inhale-Opt, which is optimized for latency, throughput, and area-overhead; and Inhale-Flex, which offers flexibility in repurposing a part of last-level caches for hash computation. We thoroughly evaluate our proposed architectures on both SRAM and ReRAM memories and compare them with the state-of-the-art in-memory and ASIC accelerators. Our performance evaluation confirms that Inhale can achieve 1.4x - 14.5x higher throughput-per-area and about two-orders-of-magnitude higher throughput-per-area-per-energy compared to the state-of-the-art solutions.
description: 9 pages, ICCAD 2022
Exploring the Dark Side of AI: Advanced Phishing Attack Design and Deployment Using ChatGPT
Creators: name: Begou, Nils
name: Vinoy, Jeremy
name: Duda, Andrzej
name: Korczynski, Maciej
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper explores the possibility of using ChatGPT to develop advanced phishing attacks and automate their large-scale deployment. We make ChatGPT generate the following parts of a phishing attack: i) cloning a targeted website, ii) integrating code for stealing credentials, iii) obfuscating code, iv) automating website deployment on a hosting provider, v) registering a phishing domain name, and vi) integrating the website with a reverse proxy. The initial assessment of the automatically generated phishing kits highlights their rapid generation and deployment process as well as the close resemblance of the resulting pages to the target website. More broadly, we demonstrate that recent advances in AI underscore the potential risks of its misuse in phishing attacks, which can lead to their increased prevalence and severity. This highlights the necessity for enhanced countermeasures within AI systems.
Lifshitz Transitions in the Ferromagnetic Superconductor UCoGe
Creators: name: Bastien, Gaël
name: Gourgout, Adrien
name: Aoki, Dai
name: Pourret, Alexandre
name: Sheikin, Ilya
name: Seyfarth, Gabriel
name: Flouquet, Jacques
name: Knebel, Georg
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present high field magnetoresistance, Hall effect and thermopower measurements in the Ising-type ferromagnetic superconductor UCoGe. Magnetic field is applied along the easy magnetization $c$ axis of the orthorhombic crystal. In the different experimental probes we observed five successive anomalies at $H \approx 4$, 9, 12, 16, and 21~T. Magnetic quantum oscillations were detected both in resistivity and thermoelectric power. At most of the anomalies, significant changes of the oscillation frequencies and the effective masses have been observed indicating successive Fermi surface instabilities induced by the strong magnetic polarization under magnetic field.
description: 7 pages, 5 figures, including supplemental material
RUEL: Retrieval-Augmented User Representation with Edge Browser Logs for Sequential Recommendation
Creators: name: Wu, Ning
name: Gong, Ming
name: Shou, Linjun
name: Pei, Jian
name: Jiang, Daxin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Online recommender systems (RS) aim to match user needs with the vast amount of resources available on various platforms. A key challenge is to model user preferences accurately under the condition of data sparsity. To address this challenge, some methods have leveraged external user behavior data from multiple platforms to enrich user representation. However, all of these methods require a consistent user ID across platforms and ignore the information from similar users. In this study, we propose RUEL, a novel retrieval-based sequential recommender that can effectively incorporate external anonymous user behavior data from Edge browser logs to enhance recommendation. We first collect and preprocess a large volume of Edge browser logs over a one-year period and link them to target entities that correspond to candidate items in recommendation datasets. We then design a contrastive learning framework with a momentum encoder and a memory bank to retrieve the most relevant and diverse browsing sequences from the full browsing log based on the semantic similarity between user representations. After retrieval, we apply an item-level attentive selector to filter out noisy items and generate refined sequence embeddings for the final predictor. RUEL is the first method that connects user browsing data with typical recommendation datasets and can be generalized to various recommendation scenarios and datasets. We conduct extensive experiments on four real datasets for sequential recommendation tasks and demonstrate that RUEL significantly outperforms state-of-the-art baselines. We also conduct ablation studies and qualitative analysis to validate the effectiveness of each component of RUEL and provide additional insights into our method.
description: CIKM 2023 ADS
Editorial: Bizarre digitization: Handymen in the future of the 3D printer
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Woddy Allen allegedly once jokingly complained, "Not only is there no God, but try to find a plumber on a Sunday." He wanted to comment less on his faith or the depths of his existence and that of his fellow human beings, but rather about the many mundane things that affect him and us all on a daily basis and thus continually prevent us from worrying about "the essentials"...
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Counterfactual Reasoning about Intent for Interactive Navigation in Dynamic Environments
Creators: name: Bordallo, A.
name: Previtali, F.
name: Nardelli, N.
name: Ramamoorthy, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many modern robotics applications require robots to function autonomously in dynamic environments including other decision making agents, such as people or other robots. This calls for fast and scalable interactive motion planning. This requires models that take into consideration the other agent's intended actions in one's own planning. We present a real-time motion planning framework that brings together a few key components including intention inference by reasoning counterfactually about potential motion of the other agents as they work towards different goals. By using a light-weight motion model, we achieve efficient iterative planning for fluid motion when avoiding pedestrians, in parallel with goal inference for longer range movement prediction. This inference framework is coupled with a novel distributed visual tracking method that provides reliable and robust models for the current belief-state of the monitored environment. This combined approach represents a computationally efficient alternative to previously studied policy learning methods that often require significant offline training or calibration and do not yet scale to densely populated environments. We validate this framework with experiments involving multi-robot and human-robot navigation. We further validate the tracker component separately on much larger scale unconstrained pedestrian data sets.
MSE-Based Transceiver Designs for RIS-Aided Communications With Hardware Impairments
Creators: name: Zhao, Jingwen
name: Chen, Ming
name: Pan, Cunhua
name: Li, Zhiyang
name: Zhou, Gui
name: Chen, Xiao
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: It is challenging to precisely configure the phase shifts of the reflecting elements at the reconfigurable intelligent surface (RIS) due to inherent hardware impairments (HIs). In this paper, the mean square error (MSE) performance is investigated in an RIS-aided single-user multiple-input multipleoutput (MIMO) communication system with transceiver HIs and RIS phase noise. We aim to jointly optimize the transmit precoder, linear received equalizer, and RIS reflecting matrices to minimize the MSE. To tackle this problem, an iterative algorithm is proposed, wherein the beamforming matrices are alternately optimized. Specifically, for the beamforming optimization subproblem, we derive the closed-form expression of the optimal precoder and equalizer matrices. Then, for the phase shift optimization subproblem, an efficient algorithm based on the majorization-minimization (MM) method is proposed. Simulation results show that the proposed MSE-based RIS-aided transceiver scheme dramatically outperforms the conventional system algorithms that do not consider HIs at both the transceiver and the RIS.
description: Accepted by IEEE Communications Letters
Editorial: Digitalisierung bizarr: Handwerker zukünftig aus dem 3D-Drucker
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Woddy Allen hat angeblich einmal scherzhaft beklagt: „Not only is there no God, but try finding a plumber on Sunday“. Damit wollte er wohl weniger über seinen Glauben oder die Tiefen seiner Existenz und der seiner Mitmenschen äußern, als vielmehr über die vielen profanen Dinge die ihn und uns alle tagtäglich betreffen und damit fortlaufend davon abhalten, uns um „Das Wesentliche“ zu kümmern...
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Assessment of forest treatment effects on runoff
Creators: name: Goh, Seng Pau.
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.
A study of the low-luminosity Type II-Plateau supernova 2008bk
Creators: name: Lisakov, Sergey
name: Dessart, Luc
name: Hillier, D. John
name: Waldman, Roni
name: Livne, Eli
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supernova (SN) 2008bk is a well observed low-luminosity Type II event visually associated with a low-mass red-supergiant progenitor. To model SN 2008bk, we evolve a 12Msun star from the main sequence until core collapse, when it has a total mass of 9.88Msun, a He-core mass of 3.22Msun, and a radius of 502Rsun. We then artificially trigger an explosion that produces 8.29Msun of ejecta with a total energy of 2.5x10^50erg and ~0.009Msun of 56Ni. We model the subsequent evolution of the ejecta with non-Local-Thermodynamic-Equilibrium time-dependent radiative transfer. Although somewhat too luminous and energetic, this model reproduces satisfactorily the multi-band light curves and multi-epoch spectra of SN 2008bk, confirming the suitability of a low-mass massive star progenitor. As in other low-luminosity SNe II, the structured Halpha profile at the end of the plateau phase is probably caused by BaII 6496.9A rather than asphericity. We discuss the sensitivity of our results to changes in progenitor radius and mass, as well as chemical mixing. A 15% increase in progenitor radius causes a 15% increase in luminosity and a 0.2mag V-band brightening of the plateau but leaves its length unaffected. An increase in ejecta mass by 10% lengthens the plateau by ~10d. Chemical mixing introduces slight changes to the bolometric light curve, limited to the end of the plateau, but has a large impact on colours and spectra at nebular times.
description: Accepted for publication in MNRAS
Two Hundred Years of British Army Casualties and Statistics
Creators: name: Bricknell, Martin
name: Bergman, Beverly
Publisher: name: British Journal for Military History
Year: 2025

description: This paper covers the evolution of medical statistics on the Army from the early nineteenth Century to the present day. Although several policies during this period described the importance of medical statistics for the planning and management of military health services, there have been problems with collecting and analysing medical data at the beginning of the First World War, the Second World War, and the campaigns in Iraq and Afghanistan. The paper considers the key features and analytical reports that have been shown necessary to report on the health of the Army and activities of the medical services in peace and war.
description: British Journal for Military History, Vol. 11 No. 1 (2025): British Journal for Military History
Modeling many-body physics with Slave-Spin Mean-Field: Mott and Hund's physics in Fe-superconductors
Creators: name: Medici, Luca de'
name: Capone, Massimo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Slave-spin mean-field theory, a light and accurate technique to model electronic correlations in Fermi-liquid phases of multi-orbital materials, is pedagogically exposed in this chapter, with a focus on its recent successful application to the physics of Iron-based superconductors. Beside introducing electronic correlations and recalling the Fermi-liquid phenomenology, the manuscript accompanies the step-by-step explanation of the slave-spin technique with a set of useful complements providing analytical insight into Mott and Hund's physics, which are at the heart of the physics of strongly correlated materials. Some original research material is also exposed, such as the Hund-induced shrinking of the Hubbard bands flanking the gap of the half-filled Mott insulator, and the low-energy description of the "orbital-decoupling" mechanism.
description: 58 pages, 19 figures. Original research material on Hund's physics (see abstract) is presented in the manuscript, supplementing the main subject about the lectures prepared for the "XIX Training Course in the Physics of Strongly Correlated Systems", Vietri sul Mare, Italy - October 2015
Entwicklung technikdidaktischer Kompetenzfacetten im Verlauf schulpraktischer Studien
Creators: name: Straub, Friederike
name: Geißel, Bernd
name: Rehm, Markus
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Der Anspruch einer stärkeren berufspraktischen Orientierung und Aufwertung von schulpraktischen Lerngelegenheiten im Rahmen der Lehrer/-innenausbildung resultierte im rein quantitativen Ausbau des zeitlichen Umfangs sowie qualitativ in neuen Ansätzen der investierten Lernbegleitung seitens der Hochschulen (vgl. Gröschner & Seidel 2012). Bislang fehlt es jedoch an geeigneten Testinstrumenten sowie empirischer Evidenz, ob Praxisphasen die gewünschten Förderwirkungen bei angehenden Lehrpersonen auch einlösen. In einem ersten Schritt widmet sich daher der vorliegende Beitrag einer Instrumentenprüfung mittels einer im Längsschnitt angelegten Untersuchung dieser Forschungsaufgabe: Inwieweit ist das umfassend validierte und auf Unterrichtsvignetten basierende Testinstrument PCK-T in der Lage, die allgemein unterstellte Entwicklung fachdidaktischer Kompetenzfacetten im Verlauf schulpraktischen Studien von Studierenden im allgemein bildenden Fach Technik[1] erfassen zu können? [1] Es wird lediglich die Erfassung zentraler technikdidaktischer Kompetenzfacetten von angehenden Lehrkräften des allgemein bildend ausgerichteten Technikunterrichts beansprucht. Für angehende Lehrkräfte gewerblich-technischer berufsbildender Schulen wäre das Instrument in der hier vorliegenden Ausgestaltungin der Verwendung ungeeignet.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Professionalism and Ethics in Military Leadership: Lessons from Pre-colonial Africa
Creators: name: Alumbugu, Esson
Publisher: name: British Journal for Military History
Year: 2025

description: This paper examines the role of professionalism and ethics in military leadership using examples from pre-colonial Africa. The Maasai warriors of East Africa provided professional military service to their society which rose to the position of hegemony in the region. Shaka developed a professional army which, through military might, placed the Zulu in a position of hegemony in Southern Africa. However, the undermining of military ethics resulted in the decline of professionalism and eventual failure in both the Maasai military and in Shaka’s military leadership. The paper concludes that military ethics must be consistently upheld to ensure professionalism and successful military leadership.
description: British Journal for Military History, Vol. 11 No. 1 (2025): British Journal for Military History
A family of permutation groups with exponentially many non-conjugated regular elementary abelian subgroups
Creators: name: Evdokimov, Sergei
name: Muzychuk, Mikhail
name: Ponomarenko, Ilia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20B99

description: Given a prime $p$, we construct a permutation group containing at least $p^{p-2}$ non-conjugated regular elementary abelian subgroups of order $p^3$. This gives the first example of a permutation group with exponentially many non-conjugated regular subgroups.
description: 6 pages
Problemlösen im Bereich der Automatisierungstechnik - Entwicklung und Evaluation eines Lehrerfortbildungskonzepts
Creators: name: Schäfer, Pia
name: Walker, Felix
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: In diesem Beitrag wird ein Fortbildungskonzept zur Förderung der analytischen Problemlösefähigkeit von Lehrpersonen an berufsbildenden Schulen vorgestellt. Für die Förderung der analytischen Problemlösefähigkeit von Auszubildenden hat sich der Cognitive Apprenticeship Ansatz als wirksam erwiesen. Der Ansatz wurde bisher noch nicht in die Lehrerbildung, in Form von Fortbildungen, überführt. Im Zentrum der entwickelten Lehrerfortbildung steht die Förderung des fachdidaktischen Wissens von Lehrpersonen im Bereich der analytischen Problemlösefähigkeit. Dabei kommen Ansätze, wie der Cognitive Apprenticeship und das informatives tutorielle Feedback zum Einsatz. Der theoretische Rahmen sowie das Erhebungsinstrument basieren auf dem TPACK-Modell zum Professionswissen von Lehrkräften.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
title: Raccontare il mondo, descrivere la natura. L’opera di Alexander von Humboldt tra letteratura e scienza
Creators: name: Tanca, Marcello
name: Serra, Valentina
Publisher: name: UNICApress
Year: 2023

description: Descritto dai suoi contemporanei come uno degli uomini più celebri della sua epoca, Alexander von Humboldt (1769-1859) è stato uno dei personaggi più ammirati del XIX secolo. Fratello minore di Wilhelm, Alexander fu insieme e nello stesso tempo botanico, naturalista, esploratore e geografo. Nel 1799 si imbarcò insieme ad Aimé Jacques Alexandre Bonpland (1773-1858) in un viaggio che li condusse prima a Tenerife, quindi in Venezuela, Colombia, Cuba, Ecuador, Perù e Messico. Frutto di questo e di altri avventurosi viaggi è una nutrita produzione letteraria e scientifica che in questo volume viene indagata unitamente alle numerose sfaccettature della figura di Humboldt e ai molteplici influssi della sua opera e del suo pensiero in ambito storico, geografico, letterario e linguistico.
Artificial stochastic neural network on the base of double quantum wells
Creators: name: Pavlovsky, O. V.
name: Dorozhinsky, V. I.
name: Mostovoy, S. D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a model of an artificial neural network based on quantum-mechanical particles in $W$ potential. These particles play the role of neurons in our model. To simulate such a quantum-mechanical system the Monte-Carlo integration method is used. A form of the self-potential of a particle as well as two interaction potentials (exciting and inhibiting) are proposed. Examples of simplest logical elements (such as AND, OR and NOT) are shown. Further we show an implementation of the simplest convolutional network in framework of our model.
description: 20 pages, 16 figures. arXiv admin note: substantial text overlap with arXiv:1806.09664
Understanding and addressing the resistance towards autonomous vehicles (AVs)
Creators: name: Nordhoff, Sina
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Autonomous vehicles (AVs) are expected to bring major benefits to transport and society. To exploit this potential, their acceptance by society is a necessary condition. However, AV acceptance is currently at stake: AVs face resistance by bystanders and local communities. Resistance can prevent the implementation and use of AVs, threatening road safety and efficiency. The present study performed a qualitative and quantitative text analysis of comments submitted by locals in San Francisco (SF) to the California Public Utilities Commission (CPUC) on the fared deployment of AVs. The results of the analysis are synthesized, and a conceptual framework explaining and predicting resistance is proposed. The framework posits that the occurrence of resistance is a direct result of the perception of threats, which is determined by individual and system characteristics, direct and indirect consequences of system use, reactions of others, and external events. AVs as threat to safety was associated with their unpredictable, and illegal driving behavior, as well as producing conflict situations. The lack of explicit communication between AVs and other road users due to the absence of a human driver behind the steering wheel negatively contributed to perceived safety and trust, especially for vulnerable populations in crossing situations. Respondents reported a negative impact on road capacity, congestion, and traffic flow, with AVs blocking other road users, such as emergency vehicles. Inaccessible vehicle design contributed to the exclusion of vulnerable groups with disabilities. The scientific dialogue on acceptance of AVs needs to shift towards resistance as the 'other' essential element of acceptance to ensure that we live up to our promise of transitioning towards more sustainable mobility that is inclusive, equitable, fair, just, affordable, and available to all.
description: 33 pages, 3 figures
‘The Presiding Spirit of this Tempest’: A Profile of General Sir James Leith (1763–1816)
Creators: name: Thompson, Paul
Publisher: name: British Journal for Military History
Year: 2025

description: This article assesses the life, career, and character of Peninsular War General Sir James Leith (1763–1816). Compared with many of his peers, Leith is an overlooked figure, whose episodes in the forefront of events are punctuated by periods of obscurity. Hitherto he has been portrayed without depth, complexity, or nuance solely as an archetypal Napoleonic-era warrior. The latter part of General Leith’s career, however, found him in a more equivocal situation, that of soldier-turned-colonial administrator. Recent scholarship has begun to pursue a more comprehensive approach to figures of Leith’s ilk. Nevertheless, a narrowly myopic, or ‘Victorian’, approach to military historiography has died hard. Numerous Wellingtonian lieutenants who evolved into architects of empire, including Benjamin D’Urban, John Colborne, Harry Smith, and Stapleton Cotton, to name just a few, lack modern, multi-dimensional reassessments, and James Leith is of their number. This article aims to bring facets of both General Leith’s soldiering and his colonial governing into clearer, contemporary focus.
description: British Journal for Military History, Vol. 11 No. 1 (2025): British Journal for Military History
Die technische Mündigkeit von Schüler/-innen zum Ende der Sek. I im internationalen Vergleich
Creators: name: Fletcher, Stefan
name: De Vries, Marc J.
name: Max, Charles
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: In internationaler Zusammenarbeit hat eine Forschergruppe ein Aufgaben-Entwicklungsmodell konzeptualisiert, auf dessen Basis ein Testinstrument zur Erfassung der technischen Mündigkeit von Schüler/-innen zum Ende der Sekundarstufe I abgeleitet wurde. Mit diesem Testinstrument wurden 270 Schülerinnen und Schülern aus Deutschland, der Schweiz, Luxemburg, den Niederlanden und England getestet. Die Ergebnisse zeigen, dass die technische Mündigkeit von Schüler/-innen im Alter von 13-16 Jahren nur mäßig ausgeprägt ist. Der durchschnittliche Anteil von 25 % der Aufgaben, die mit hoher Sicherheit falsch beantwortet wurden, lässt den Schluss zu, dass sich neben fehlendem Wissen auch eine relativ hohe Anzahl von Misskonzepten bei den Schüler/-innen verfestigt hat. Interessanterweise zeigen sich dabei keine großen Unterschiede in Bezug auf die einzelnen Länder und das Geschlecht. Schlüsselwörter: Technische Mündigkeit, Testinstrument, international
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Fatigue and creep behaviour of aged alloys based on Al-4%Cu-0.3%Mg
Creators: name: Arumalla, Somi Reddy.
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.
2D Constrained Navier-Stokes Equations
Creators: name: Brzeźniak, Zdzisław
name: Dhariwal, Gaurav
name: Mariani, Mauro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study 2D Navier-Stokes equations with a constraint on $L^2$ energy of the solution. We prove the existence and uniqueness of a global solution for the constrained Navier-Stokes equation on $\R^2$ and $\T$, by a fixed point argument. We also show that the solution of constrained Navier-Stokes converges to the solution of Euler equation as viscosity $ν$ vanishes.
Comparative study of low-temperature opacities with GARSTEC models
Creators: name: Reeve, Pedro Diaz
name: Serenelli, Aldo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a comparative study of the effect of low-temperature opacities on stellar models up to the Red Giant branch (RGB), computed with the GARching STellar Evolution Code. We have used two sets of low-temperature opacities; ÆSOPUS (Æ) from the University of Padova and those from the Wichita State University group (F05). In the relevant range of temperatures for this study, log \k{appa}Æ < log \k{appa}F 05. Therefore, to compare stellar evolutionary tracks, we performed a solar calibration of the αmlt, for each set of low-temperature opacities. After carrying such a calibration, we find that stellar evolutionary tracks are almost unaffected by the choice of low-temperature opacities, with largest variations of 25-30 K at the latest evolutionary stages of the RGB phase.
Reconstruction of Sub-Surface Velocities from Satellite Observations Using Iterative Self-Organizing Maps
Creators: name: Chapman, Christopher
name: Charantonis, Anastase Alexandre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In this letter a new method based on modified self-organizing maps is presented for the reconstruction of deep ocean current velocities from surface information provided by satellites. This method takes advantage of local correlations in the data-space to improve the accuracy of the reconstructed deep velocities. Unlike previous attempts to reconstruct deep velocities from surface data, our method makes no assumptions regarding the structure of the water column, nor the underlying dynamics of the flow field. Using satellite observations of surface velocity, sea-surface height and sea-surface temperature, as well as observations of the deep current velocity from autonomous Argo floats to train the map, we are able to reconstruct realistic high--resolution velocity fields at a depth of 1000m. Validation reveals extremely promising results, with a speed root mean squared error of ~2.8cm/s, a factor more than a factor of two smaller than competing methods, and direction errors consistently smaller than 30 degrees. Finally, we discuss the merits and shortcomings of this methodology and its possible future applications.
description: Submitted to IEEE geoscience and remote sensing letters
Maximum range of a projectile thrown from constant-speed circular motion
Creators: name: Poljak, Nikola
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The problem of determining the angle at which a point mass launched from ground level with a given speed is a standard exercise in mechanics. Similar, yet conceptually and calculationally more difficult problems have been suggested to improve student proficiency in projectile motion. The problem of determining the maximum distance of a rock thrown from a rotating arm motion is presented and analyzed in detail in this text. The calculational results confirm several conceptually derived conclusions regarding the initial throw position and provide some details on the angles and the way of throwing (underhand or overhand) which produce the maximum throw distance.
description: 9 pages, 5 figures, to be published in The Physics Teacher
Doping of Ga in antiferromagnetic semiconductor alpha-Cr2O3oxide and its effects on modified magnetic and electronic properties
Creators: name: Bhowmik, R. N.
name: Siva, K. Venkata
name: Ranganathan, R.
name: Mazumdar, Chandan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The samples of Ga doped Cr2O3 oxide have been prepared using chemical co-precipitation route. X-ray diffraction pattern and Raman spectra have confirmed rhombohedral crystal structure with space group R3-C. Magnetic measurement has indicated the dilution of antiferromagnetic (AFM) spin order in Ga doped alpha-Cr2O3 system oxide, where the AFM transition temperature of bulk alpha-Cr2O3 oxide at about 320 K has been suppressed and ferrimagnetic behavior is observed from the analysis of the temperature dependence of magnetization data below 350 K. Apart from Ga doping effect, the spin freezing (50 K-70 K) and superparamagnetic behavior of the surface spins at lower temperatures, typically below 50 K, have been exhibited due to nano-sized grains of the samples. All the samples showed non-linear current-voltage (I-V) characteristics. However, I-V characteristics of the Ga doped samples are remarkably different from alpha-Cr2O3 sample. The I-V curves of Ga doped samples have exhibited many unique electronic properties, e.g., bi-stable (low resistance- LR and high resistance-HR) electronic states and negative differential resistance (NDR). Optical absorption spectra revealed three electronic transitions in the samples associated with band gap energy at about 2.67-2.81 eV, 1.91-2.11 eV, 1.28-1.35 eV, respectively.
Lehramtsstudierende mit dem Unterrichtsfach Technik. Eine ausbildungsstandortübergreifende Analyse
Creators: name: Bünning, Frank
name: Haverkamp, Henrike
name: Lang, Martin
name: Pohl, Marion
name: Röben, Peter
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Im Hinblick auf den hohen Bedarf an Technik-Lehrkräften werden Studierende an den Ausbildungsstandorten Magdeburg, Oldenburg und Duisburg-Essen zu ihrem Studium befragt. Es wird untersucht, welche Spezifika die Studierenden aufweisen und welche Beweggründe für die Aufnahme des Studiums ausschlaggebend sind. Methodisch wird dabei auf eine Dokumenten- bzw. Sekundäranalyse und eine Fragebogenuntersuchung zurückgegriffen (n= 108). Es können standortübergreifende Charakteristika und standortspezifische Besonderheiten ausgemacht werden. Die Studierenden haben mehrheitlich selber keinen Technikunterricht besucht, sind an Technik interessiert und wissen von den sehr guten Berufsaussichten ihres Faches. Standortspezifische Unterschiede liegen im Alter der Studierenden, den beruflichen Vorerfahrungen, der Absicht den Studiengang zu wechseln und dem Geschlecht.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Achieve Fully Decentralized End to End Encryption Meeting via Blockchain
Creators: name: Yang
name: Tan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Zoom Meeting is an enterprise online video conferencing solution with real-time messaging and content sharing. However, it's lack of privacy protection since centralized Zoom servers are capable of monitoring user's messages. Thereby, to solve the privacy problem, in May 2020, Zoom acquired Keybase so that Keybase's team can help it to build end-to-end encryption meeting while remaining Zoom's current scalability and high-performance. Nonetheless, according to the latest released Zoom's whitepaper, even with the new design of E2E (end to end) encryption meeting, the security threats can't be erased completely since the new design is not fully decentralized. In this paper, we introduce a fully decentralized design of E2E encryption meeting via blockchain technology. With this new design, Zoom's E2E meeting privacy can be further improved.
Technologieakzeptanz von virtuellen Lern- und Arbeitsumgebungen in technischen Domänen
Creators: name: Pletz, Carolin
name: Zinn, Bernd
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Im beruflichen Aus- und Weiterbildungsbereich werden mit der Nutzung virtueller Umgebungen (Virtual Reality, kurz VR) vielfältige Potentiale verbunden, um Lern- und Arbeitsprozesse zu optimieren. Bislang ist aber noch wenig über die tatsächliche Akzeptanz der VR Technologie in technischen Domänen bekannt. Die vorliegende hypothesenprüfende Studie geht hierzu der Frage nach, inwiefern die theoretischen Annahmen des „Technology Acceptance Model“ (TAM) die Nutzungsintention zur VR Technologie von Beschäftigten in technischen Domänen erklärt. Die Befunde des aufgestellten Strukturgleichungsmodells zur Aufklärung der Varianz der Nutzungsintention (RÂ² = 0.354) belegen erwartungskonform positive Zusammenhänge zwischen der wahrgenommenen Nützlichkeit und der Nutzungsintention sowie der wahrgenommenen Benutzerfreundlichkeit und der Nutzungsintention. Weiterhin zeigen die Studienergebnisse, dass Personen, die Erfahrung mit der VR Technologie haben, die wahrgenommene Nützlichkeit und die Nutzungsintention signifikant höher bewerten als Personen ohne Erfahrung mit der VR Technologie.
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 4 (2018): Journal of Technical Education (JOTED)
Properties of interstellar dust responsible for extinction laws with unusually low total-to-selective extinction ratios of Rv=1-2
Creators: name: Nozawa, Takaya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is well known that the extinction properties along lines of sight to Type Ia supernovae are described by steep extinction curves with unusually low total-to-selective extinction ratios of Rv = 1.0-2.0. In order to reveal the properties of interstellar dust that causes such peculiar extinction laws, we perform the fitting calculations to the measured extinction curves by applying a two-component dust model composed of graphite and silicate. As for the size distribution of grains, we consider two function forms of the power-law and lognormal distributions. We find that the steep extinction curves derived from the one-parameter formula by Cardelli et al. (1989) with Rv = 2.0, 1.5, and 1.0 can be reasonably explained even by the simple power-law dust model that has a fixed power index of -3.5 with the maximum cut-off radii of a_{max} = 0.13 um, 0.094 um, and 0.057 um, respectively. These maximum cut-off radii are smaller than a_{max} ~ 0.24 um considered to be valid in the Milky Way, clearly demonstrating that the interstellar dust responsible for steep extinction curves is highly biased to smaller sizes. We show that the lognomal size distribution can also lead to good fits to the extinction curves with Rv = 1.0-3.1 by taking the appropriate combinations of the relevant parameters. We discuss that the extinction data at ultraviolet wavelengths are essential for constraining the composition and size distribution of interstellar dust.
description: 16 pages, 7 figures, 7 tables, accepted for publication in Planetary and Space Science (special issue for Cosmic Dust VIII)
A system architecture for real-time application software
Creators: name: Mutabazi, Steven L.
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.
Berufliche oder akademische Bildung - Übergangsverhalten im Rahmen der Fachschule Technik
Creators: name: Siegel, Stefanie
name: Wyrwal, Matthias
name: Zinn, Bernd
Publisher: name: Journal of Technical Education (JOTED)
Year: 2018

description: Der Beitrag beschäftigt sich erstens mit den Motiven und Interessen von Schülerinnen und Schülern der Fachschule Technik im Spannungsfeld zwischen postsekundärer Berufsbildung und akademischer Weiterbildung. Die Untersuchung geht der Frage nach, warum sich trotz bestehender akademischer Bildungsoptionen beruflich Qualifizierte aus dem gewerblich-technischen Bereich für einen beruflichen Bildungsweg und nicht für ein Studium entscheiden. Im Rahmen der Untersuchung werden die motivationalen und interessenbezogenen Merkmale von Schülerinnen und Schülern der Fachschule Technik (N = 716) mit den Schwerpunkten Bau- und Maschinenbautechnik analysiert (Studie 1). Da davon auszugehen ist, dass entsprechende Bildungswahlentscheidungen auch vom aktuellen Arbeitsmarkt beeinflusst sind, wird zweitens in einer Stellenanzeigenanalyse (Studie 2) und einer Arbeitsmarktdatenanalyse in den Bundesländern Baden-Württemberg, Bayern und Hessen (Studie 3) systematisch untersucht, wie sich die berufliche Konkurrenz- und Beschäftigungssituation von Technikern darstellt. Schlüsselwörter: Postsekundäre Weiterbildung, Wiedereinstieg, Übergangsverhalten, Techniker, Fachschule
description: Journal of Technical Education (JOTED), Bd. 6 Nr. 3 (2018): Journal of Technical Education (JOTED)