cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tail Dependence in REITs Returns / Kridsda Nimmanunta, Kanak Patel. - (SEC Working Paper Forum; 9)
Creators: name: Patel, Kanaklata
Publisher: name: SEC Working Paper Forum
Year: 2015
Subjects: REITs
Dependence Structure
Tail Dependence
Conditional Copula

description: This study investigates the dependence structure of returns of different sectors of equity REITs: Industrial & Office, Residential, Retail, and Hotel & Lodging. The sample covers the daily returns of the U.S. REITs from January 2000 to December 2011. Copulas, which provide a tractable way of modelling non-linear dependency among random variables, are employed under a financial time series framework. The model consists of two parts: the marginal part, which represents the dynamic behaviour of each individual marginal, and the copula part, which represents the joint dependence among those individual components. Specifically, the REITs returns are fitted using GJR-t-GARCH models and then analysed using time-varying conditional copulas to ascertain if tail dependence exists. The study tests a number of well-known copulas, i.e., Gaussian, Student t, Frank, Gumbel, Clayton, and Symmetrised Joe-Clayton, to identify the most suitable one. For Student t copula, the time path of the tail dependence is characterised to see how the dynamics of the tail dependency evolves, and then seek to examine the effects of tail dependence on optimal portfolios. Keywords: REITS, Dependence Structure, Tail Dependence, Conditional Copula JEL Classification: G10, C51, C12, C13, C32
CEDAR: tools for event generator tuning
Creators: name: Buckley, Andy
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I describe the work of the CEDAR collaboration in developing tools for tuning and validating Monte Carlo event generator programs. The core CEDAR task is to interface the Durham HepData database of experimental measurements to event generator validation tools such as the UCL JetWeb system - this has necessitated the migration of HepData to a new relational database system and a Java-based interaction model. The "number crunching" part of JetWeb is also being upgraded, from the Fortran HZTool library to the new C++ Rivet system and a generator interfacing layer named RivetGun. Finally, I describe how Rivet is already being used as a central part of a new generator tuning system, and summarise two other CEDAR activities, HepML and HepForge.
description: 13 pages, prepared for XI International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Amsterdam, April 23-27 2007
Estimating and abstracting the 3D structure of feline bones using neural networks on X-ray (2D) images
Creators: name: Čavojská, Jana
name: Petrasch, Julian
name: Mattern, Denny
name: Lehmann, Nicolas Jens
name: Voisard, Agnès
name: Böttcher, Peter
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Image processing
subject: Machine learning
subject: Software
subject: X-ray tomography
subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik

description: Computing 3D bone models using traditional Computed Tomography (CT) requires a high-radiation dose, cost and time. We present a fully automated, domain-agnostic method for estimating the 3D structure of a bone from a pair of 2D X-ray images. Our triplet loss-trained neural network extracts a 128-dimensional embedding of the 2D X-ray images. A classifier then finds the most closely matching 3D bone shape from a predefined set of shapes. Our predictions have an average root mean square (RMS) distance of 1.08 mm between the predicted and true shapes, making our approach more accurate than the average achieved by eight other examined 3D bone reconstruction approaches. Each embedding extracted from a 2D bone image is optimized to uniquely identify the 3D bone CT from which the 2D image originated and can serve as a kind of fingerprint of each bone; possible applications include faster, image content-based bone database searches for forensic purposes.
Morphence: Moving Target Defense Against Adversarial Examples
Creators: name: Amich, Abderrahmen
name: Eshete, Birhanu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Robustness to adversarial examples of machine learning models remains an open topic of research. Attacks often succeed by repeatedly probing a fixed target model with adversarial examples purposely crafted to fool it. In this paper, we introduce Morphence, an approach that shifts the defense landscape by making a model a moving target against adversarial examples. By regularly moving the decision function of a model, Morphence makes it significantly challenging for repeated or correlated attacks to succeed. Morphence deploys a pool of models generated from a base model in a manner that introduces sufficient randomness when it responds to prediction queries. To ensure repeated or correlated attacks fail, the deployed pool of models automatically expires after a query budget is reached and the model pool is seamlessly replaced by a new model pool generated in advance. We evaluate Morphence on two benchmark image classification datasets (MNIST and CIFAR10) against five reference attacks (2 white-box and 3 black-box). In all cases, Morphence consistently outperforms the thus-far effective defense, adversarial training, even in the face of strong white-box attacks, while preserving accuracy on clean data.
Infinitely generated free nilpotent groups: completeness of the automorphism groups
Creators: name: Tolstykh, Vladimir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 20F28, 20F18, 03C60

description: Baumslag conjectured in the 1970s that the automorphism tower of a finitely generated free nilpotent group must be very short. Let F_{n,c} denote a free nilpotent group of finite rank n at least two and of nilpotency class c at least two. In 1976 Dyer and Formanek proved that the automorphism group of F_{n,2} is even complete (and hence the height of the aumorphism tower of F_{n,2} is two) provided that n is not three; in the case when n=3, the height of the automorphism tower of F_{n,2} is three. The author proved in 2001 that the automorphism group of any infinitely generated free nilpotent of class two is complete. In his Ph. D. thesis (2003) Kassabov found an upper bound u(n,c) (a natural number) for the height of the automorphism tower of F_{n,c} in terms of n and c, thereby finally proving Baumslag's conjecture. By analyzing the function u(n,c), one can conclude that if c is small compared to n, then the height of the automorphism tower of F_{n,c} is at most three. The main result of the present paper states that the automorphism group of any infinitely generated free nilpotent group of nilpotency class at least two is complete. Thus the automorphism tower of any free nilpotent group terminates after finitely many steps.
description: Revised version
Rapid onset of molecular friction in liquids bridging between the atomistic and hydrodynamic pictures
Creators: name: Straube, Arthur V.
name: Kowalik, Bartosz G.
name: Netz, Roland R.
name: Höfling, Felix
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Coarse-grained models
subject: Soft materials
subject: Statistical physics
subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Friction in liquids arises from conservative forces between molecules and atoms. Although the hydrodynamics at the nanoscale is subject of intense research and despite the enormous interest in the non-Markovian dynamics of single molecules and solutes, the onset of friction from the atomistic scale so far could not be demonstrated. Here, we fill this gap based on frequency-resolved friction data from high-precision simulations of three prototypical liquids, including water. Combining with theory, we show that friction in liquids emerges abruptly at a characteristic frequency, beyond which viscous liquids appear as non-dissipative, elastic solids. Concomitantly, the molecules experience Brownian forces that display persistent correlations. A critical test of the generalised Stokes–Einstein relation, mapping the friction of single molecules to the visco-elastic response of the macroscopic sample, disproves the relation for Newtonian fluids, but substantiates it exemplarily for water and a moderately supercooled liquid. The employed approach is suitable to yield insights into vitrification mechanisms and the intriguing mechanical properties of soft materials.
Dynamic palmitoylation events following T-cell receptor signaling
Creators: name: Morrison, Eliot
name: Wegner, Tatjana
name: Zucchetti, Andres Ernesto
name: Álvaro-Benito, Miguel
name: Zheng, Ashley
name: Kliche, Stefanie
name: Krause, Eberhard
name: Brügger, Britta
name: Hivroz, Claire
name: Freund, Christian
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Chemical modification
subject: Enzymes
subject: Lipids
subject: Proteomics
subject: Signal transduction
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::547 Organische Chemie

description: Palmitoylation is the reversible addition of palmitate to cysteine via a thioester linkage. The reversible nature of this modification makes it a prime candidate as a mechanism for regulating signal transduction in T-cell receptor signaling. Following stimulation of the T-cell receptor we find a number of proteins are newly palmitoylated, including those involved in vesicle-mediated transport and Ras signal transduction. Among these stimulation-dependent palmitoylation targets are the v-SNARE VAMP7, important for docking of vesicular LAT during TCR signaling, and the largely undescribed palmitoyl acyltransferase DHHC18 that is expressed in two isoforms in T cells. Using our newly developed On-Plate Palmitoylation Assay (OPPA), we show DHHC18 is capable of palmitoylating VAMP7 at Cys183. Cellular imaging shows that the palmitoylation-deficient protein fails to be retained at the Golgi and to localize to the immune synapse upon T cell activation.
Personalizing Performance Regression Models to Black-Box Optimization Problems
Creators: name: Eftimov, Tome
name: Jankovic, Anja
name: Popovski, Gorjan
name: Doerr, Carola
name: Korošec, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Accurately predicting the performance of different optimization algorithms for previously unseen problem instances is crucial for high-performing algorithm selection and configuration techniques. In the context of numerical optimization, supervised regression approaches built on top of exploratory landscape analysis are becoming very popular. From the point of view of Machine Learning (ML), however, the approaches are often rather naive, using default regression or classification techniques without proper investigation of the suitability of the ML tools. With this work, we bring to the attention of our community the possibility to personalize regression models to specific types of optimization problems. Instead of aiming for a single model that works well across a whole set of possibly diverse problems, our personalized regression approach acknowledges that different models may suite different types of problems. Going one step further, we also investigate the impact of selecting not a single regression model per problem, but personalized ensembles. We test our approach on predicting the performance of numerical optimization heuristics on the BBOB benchmark collection.
description: To appear in the Proceedings of Genetic and Evolutionary Computation Conference (GECCO 2021), ACM
Unmanned Aerial Vehicle Instrumentation for Rapid Aerial Photo System
Creators: name: Adiprawita, Widyawardana
name: Ahmad, Adang Suwandi
name: Semibiring, Jaka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: B.7.2

description: This research will proposed a new kind of relatively low cost autonomous UAV that will enable farmers to make just in time mosaics of aerial photo of their crop. These mosaics of aerial photo should be able to be produced with relatively low cost and within the 24 hours of acquisition constraint. The autonomous UAV will be equipped with payload management system specifically developed for rapid aerial mapping. As mentioned before turn around time is the key factor, so accuracy is not the main focus (not orthorectified aerial mapping). This system will also be equipped with special software to post process the aerial photos to produce the mosaic aerial photo map
description: Uploaded by ICIUS2007 Conference Organizer on behalf of the author(s). 8 pages, 9 figures
The ATLAS discovery potential for MSSM neutral Higgs bosons decaying to a mu+mu- pair in the mass range up to 130 GeV
Creators: name: Gentile, S.
name: Bilokon, H.
name: Chiarella, V.
name: Nicoletti, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are presented on the discovery potential for MSSM neutral Higgs bosons in the Mh-{max}scenario. The region of large tan beta, between 15 and 50, and mass between ~ 95 and 130 GeV is considered in the framework of the ATLAS experiment at the Large Hadron Collider (LHC), for a centre-of-mass energy = 14 TeV. This parameter region is not fully covered by the present data either from LEP or from Tevatron. The h/A bosons, supposed to be very close in mass in that region, are studied in the channel h/A -> mu+mu- accompanied by two b-jets. The study includes a method to control the most copious background, Zo -> mu+mu- accompanied by two b-jets. A possible contribution of the H boson to the signal is also considered.
Attosecond Intramolecular-Scattering and Vibronic Delay
Creators: name: Ghomashi, Bejan
name: Douguet, Nicolas
name: Argenti, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The photoionization of the CO molecule from the C$-1s$ orbital does not obey the Franck-Condon approximation, as a consequence of the nuclear recoil that accompanies the direct emission and intra-molecular scattering of the photoelectron. We use an analytical model to investigate the temporal signature of the entangled nuclear and electronic motion in this process. We show that the photoelectron emission delay can be decomposed into its localization and resonant-confinement components. Finally, photoionization by a broadband soft-x-ray pulse results in a coherent vibrational ionic state with a tunable delay with respect to the classical sudden-photoemission limit.
description: 5 pages, 4 figures, to be presented at DAMOP 2021 in the focus session on the application of XFEL light
title: UNE STATION THERMALE QUI NE VIT JAMAIS LE JOUR : BIDART (PYRÉNÉES-ATLANTIQUES)
title: A spa resort which never was born : Bidart (Pyrénées-Atlantiques)
Creators: name: Raynal, Cécile
name: Lefebvre, Thierry
Publisher: name: Société française de médecine thermale
Year: 2017

description: Bidart, station balnéaire voisine de Biarritz, ne doit pas sa renommée à ses eaux minérales. Pourtant, plusieurs ouvrages d’hydrologie y annoncèrent, au début des années 1930, la création d’une station thermale. Le pharmacien biarrot André Cussac (1863-1946), commença par créer les Laboratoires de thérapeutique marine de Biarritz et leur produit phare, le Marinol. Il soutint une thèse de doctorat de pharmacie sur la thérapeutique marine et rencontra, à cette occasion, plusieurs spécialistes en hydrologie. Devenu membre de la Société d’hydrologie de Paris, il conçut le projet d’exploiter comme eau minérale la source Royale, propriété de la commune de Bidart. Il s’associa avec la municipalité pour exploiter cette eau qu’il baptisa Contresta, mais divers obstacles empêchèrent l’aboutissement de cette utopie thermale.
description: Bidard, seaside resort near Biarritz (France), does not owe its reputation to its mineral waters.
However, the city almost became a spa in the 1930’s, on the initiative of the pharmacist André Cussac (1863-1946), founder of the Biarritz “Laboratoires de thérapeutique marine”. Also a member of the “Société d’hydrologie de Paris”, he planned to exploit, with the help of the muni- cipality of Bidart, a local source (source Royale, renamed Contresta). He unfortunately failed in his project.
Spatiotemporal Imaging of Thickness-Induced Band Bending Junctions
Creators: name: Wong, Joeson
name: Davoyan, Artur R.
name: Liao, Bolin
name: Krayev, Andrey
name: Jo, Kiyoung
name: Rotenberg, Eli
name: Bostwick, Aaron
name: Jozwiak, Chris
name: Jariwala, Deep
name: Zewail, Ahmed
name: Atwater, Harry A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Van der Waals materials exhibit naturally passivated surfaces and can form versatile heterostructures, enabling observation of carrier transport mechanisms not seen in three-dimensional materials. Here we report observation of a "band bending junction", a new type of semiconductor homojunction whose surface potential landscape depends solely on a difference in thickness between the two semiconductor regions atop a buried heterojunction interface. Using MoS2 on Au to form a buried heterojunction interface, we find that lateral surface potential differences can arise in MoS2 from the local extent of vertical band bending in thin and thick MoS2 regions. Using scanning ultrafast electron microscopy, we examine the spatiotemporal dynamics of photogenerated charge carriers and find that lateral carrier separation is enabled by a band bending junction, which is confirmed with semiconductor transport simulations. Band bending junctions may therefore enable new electronic and optoelectronic devices in Van der Waals materials that rely on thickness variations rather than doping to separate charge carriers.
description: 16 pages, 4 figures
Virus Assembly Pathways inside a Host Cell
Creators: name: Panahandeh, Sanaz
name: Li, Siyu
name: Dragnea, Bogdan
name: Zandi, Roya
Publisher: name: arXiv
Year: 2022
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Simple RNA viruses self-assemble spontaneously and encapsulate their genome into a shell called the capsid. This process is mainly driven by the attractive electrostatic interaction between the positive charges on capsid proteins and the negative charges on the genome. Despite its importance and many decades of intense research, how the virus selects and packages its native RNA inside the crowded environment of a host cell cytoplasm in the presence of an abundance of non-viral RNA and other anionic polymers, has remained a mystery. In this paper, we perform a series of simulations to monitor the growth of viral shells and find the mechanism by which cargo-coat protein interactions can impact the structure and stability of the viral shells. We show that coat protein subunits can assemble around a globular nucleic acid core by forming non-icosahedral cages, which have been recently observed in assembly experiments involving small pieces of RNA. We find that the resulting cages are strained and can easily be split into fragments along stress lines. This suggests that such metastable non-icosahedral intermediates could be easily re-assembled into the stable native icosahedral shells if the larger wild-type genome becomes available, despite the presence of myriad of non-viral RNAs.
First Principle Approach to Modeling of Small Scale Helicopter
Creators: name: Budiyono, A.
name: Sudiyanto, T.
name: Lesmana, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: I.6.1

description: The establishment of global helicopter linear model is very precious and useful for the design of the linear control laws, since it is never afforded in the published literatures. In the first principle approach, the mathematical model was developed using basic helicopter theory accounting for particular characteristic of the miniature helicopter. No formal system identification procedures are required for the proposed model structure. The relevant published literatures however did not present the linear models required for the design of linear control laws. The paper presents a step by step development of linear model for small scale helicopter based on first-principle approach. Beyond the previous work in literatures, the calculation of the stability derivatives is presented in detail. A computer program is used to solve the equilibrium conditions and then calculate the change in aerodynamics forces and moments due to the change in each degree of freedom and control input. The detail derivation allows the comprehensive analysis of relative dominance of vehicle states and input variables to force and moment components. Hence it facilitates the development of minimum complexity small scale helicopter dynamics model.
description: Uploaded by ICIUS2007 Conference Organizer on behalf of the author(s). 11 pages, 22 figures, 16 tables
Trade Policy Trends: COVID-19, the Great Trade Collapse, and Canadian Trade Policy
Creators: name: Beaulieu, Eugene
name: Klemen, Dylan
Publisher: name: The School of Public Policy Publications
Year: 2021

description: COVID-19 led to a marked decline in global trade. Canadian trade also dropped significantly. This led commentators to compare the COVID-19 pandemic to the Great Trade Collapse of 2008. This paper compares both crises and finds that Canada’s total trade (imports + exports) has almost entirely recovered since COVID-19 began. In contrast, Canada took much longer to recover from the collapse caused by the Great Trade Collapse.
description: The School of Public Policy Publications, Vol. 14 (2021)
Mechanisms of Size Control and Polymorphism in Viral Capsid Assembly
Creators: name: Elrad, Oren M.
name: Hagan, Michael F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We simulate the assembly dynamics of icosahedral capsids from subunits that interconvert between different conformations (or quasi-equivalent states). The simulations identify mechanisms by which subunits form empty capsids with only one morphology but adaptively assemble into different icosahedral morphologies around nanoparticle cargoes with varying sizes, as seen in recent experiments with brome mosaic virus (BMV) capsid proteins. Adaptive cargo encapsidation requires moderate cargo-subunit interaction strengths; stronger interactions frustrate assembly by stabilizing intermediates with incommensurate curvature. We compare simulation results to experiments with cowpea chlorotic mottle virus empty capsids and BMV capsids assembled on functionalized nanoparticles and suggest new cargo encapsidation experiments. Finally, we find that both empty and templated capsids maintain the precise spatial ordering of subunit conformations seen in the crystal structure even if interactions that preserve this arrangement are favored by as little as the thermal energy, consistent with experimental observations that different subunit conformations are highly similar.
Behavior and limitations of molecular and population-level models of evolution
Creators: name: Sydykova, Dariya
name: 0000-0002-9016-5081
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Protein evolution
Molecular evolution
Population genetics
Measurement theory

description: Numerous models of molecular evolution have been developed over the years. Our knowledge of these models, while extensive in some aspects, is limited in others. Often models were developed independently of other models resulting in a lack of an understanding about how one model's parameters relate to the parameters in a different model. For example, some models work with codon sequences and others work with amino acid sequences. How the site-wise rates in an amino acid based model translate to the site-wise rates in a codon based model is unknown. It is also unclear how different parameters relate to the underlying evolutionary processes. For example, what physical quantities are measured by the site-wise rate of evolution is unclear. In Chapter 1, I introduce the concepts of modeling evolution and the principles of the inference of site-specific rates of evolution in a protein coding sequence. In Chapter 2, I determine the relationship between amino acid models and codon models of evolution. This relationship demonstrates how site-specific rates from a codon model relate to an amino acid model, and the deviations between the two estimates. This relationship also benchmarks empirical amino acid models against more mechanistic codon models. In Chapter 3, I establish how model choice affects maximum likelihood inference of site-specific rate of evolution. I analytically derive the site-wise rate under the assumptions of different substitution models. For the models where an analytically derived solution is not possible, I assess their effect on site-wise rates numerically. In Chapter 4, I demonstrate that when mutation can change epistatic interactions, small populations tend to evolve towards one of the two fixed points of epistasis. Our theory demonstrates that these points can be identified with mutation or drift robustness. Finally, in Chapter 5, I place these results in context, and I discuss future avenues to improve current models of evolution.
Labour relations in Japan's postwar coal industry : the 1960 Miike lockout
Creators: name: Price, John
Publisher: name: University of British Columbia
Year: 2010

description: The essay explores the events and background of the 1960 lockout at the Miike colleries of the Mitsui Mining Co. in Kyushu, Japan. The dispute, one of the longest and most violent in postwar labour history, occurred at the same time as the anti-U.S.-Japan security treaty struggle and the two events capped 15 years of social turbulence after the war. At issue in the Miike case was the designated dismissal of 1200 miners. In analyzing the events at Miike the author challenges current assumptions about the so-called three pillars of Japanese labour-management relations (lifetime employment, enterprise unions, and seniority-based wages). Couterposed are four factors—capitalist rationalism, worker egalitarianism, enterprise corporatism, and liberal democracy—the combination of which lend Japanese labour-management relations their specific character in any given instance. The essay also explores the particular role of the Japan Federation of Employers Organizations (Nikkeiren) in other labour disputes in the 1950s as well as at Miike. The economic background to the Miike strike is also analyzed, in particular, the political aspects of the rationalization of the coal industry. The final chapter deals with relief measures for unemployed coal miners and coal companies during the 1960s.
Exposure to the heated tobacco product IQOS generates apoptosis-mediated pulmonary emphysema in murine lungs
Creators: name: Nitta, Naoko
name: Sato, Tadashi
name: Komura, Moegi
name: Yoshikawa, Hitomi
name: Suzuki, Yohei
name: Mitsui, Aki
name: Kuwasaki, Eriko
name: Takahashi, Fumiyuki
name: Kodama, Yuzo
name: Seyama, Kuniaki
name: Takahashi, Kazuhisa
Publisher: name: figshare
Year: 2021
Subjects: subject: 110203 Respiratory Diseases
subject: FOS: Clinical medicine

description: This is the additional data of the manuscript "Exposure to the heated tobacco product IQOS generates apoptosis-mediated pulmonary emphysema in murine lungs".
Effects of VR Gaming and Game Genre on Player Experience
Creators: name: Carroll, Michael
name: Osborne, Ethan
name: Yildirim, Caglar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: With the increasing availability of modern virtual reality (VR) headsets, the use and applications of VR technology for gaming purposes have become more pervasive than ever. Despite the growing popularity of VR gaming, user studies into how it might affect the player experience (PX) during the gameplay are scarce. Accordingly, the current study investigated the effects of VR gaming and game genre on PX. We compared PX metrics for two game genres, strategy (more interactive) and racing (less interactive), across two gaming platforms, VR and traditional desktop gaming. Participants were randomly assigned to one of the gaming platforms, played both a strategy and racing game on their corresponding platform, and provided PX ratings. Results revealed that, regardless of the game genre, participants in the VR gaming condition experienced a greater level of sense of presence than did those in the desktop gaming condition. That said, results showed that the two gaming platforms did not significantly differ from one another in PX ratings. As for the effect of game genre, participants provided greater PX ratings for the strategy game than for the racing game, regardless of whether the game was played on a VR headset or desktop computer. Collectively, these results indicate that although VR gaming affords a greater sense of presence in the game environment, this increase in presence does not seem to translate into a more satisfactory PX when playing either a strategy or racing game.
description: 2019 IEEE Games, Entertainment, Media Conference (GEM)
A Gaussian approximation to the effective potential
Creators: name: Morgan, David C.
Publisher: name: University of British Columbia
Year: 2010

description: This thesis investigates some of the properties of a variational approximation to scalar field theories: a trial wavefunctional which has a gaussian form is used as a ground state ansatz for an interacting scalar field theory - the expectation value of the Hamiltonian in this state is then minimized. This we call the Gaussian Approximation; the resulting effective potential we follow others by calling the Gaussian Effective Potential (GEP). An equivalent but more general finite temperature formalism is then reviewed and used for the calculations of the GEP in this thesis. Two scalar field theories are described: ϕ⁴ theory in four dimensions (ϕ⁴₄) and ϕ⁶ theory in three dimensions (ϕ⁶₃). After showing what the Gaussian Approximation does in terms of Feynman diagrams, renormalized GEP's are calculated for both theories. Dimensional Regularization is used in the renormalization and this this is especially convenient for the GEP in ϕ⁶₃ theory because it becomes trivially renor-malizable. It is noted that ϕ⁶₃ loses its infrared asymptotic freedom in the Gaussian Approximation. Finally, it is shown how a finite temperature GEP can be calculated by finding low and high temperature expansions of the temperature terms in ϕ⁶₃ theory.
Towards the social innovation lighthouse: European ecosystems addressing the innovation divide
Creators: name: Dantas, Carina
name: Caro-Gonzalez, Antonia
name: Cabrita, Miriam
name: Machado, Natália
name: van Staalduinen, Willeke
name: Machowska, Monika
name: Włodarczyk-Gebik, Agnieszka
name: Vallejo, Olatz
Publisher: name: Zenodo
Year: 2023
Subjects: European Innovation Agenda
Social Innovation
ecosystem
SHAFE
stakeholder engagement

description: The new European Innovation Agenda foresees as one of its flagships the aim of “Accelerating and strengthening innovation in  European Innovation Ecosystems across the EU and addressing the innovation divide”. Two European Innovation Ecosystems funded  Actions, SIRENE and INTEGER, are working towards this goal: SIRENE works to improve wellbeing and housing conditions by  empowering social and private entrepreneurs, while INTEGER is focused on developing more robust, sustainable, and inclusive  ecosystems for healthy living and wellbeing.
On Asymptotics of $q$-Gamma Functions
Creators: name: Zhang, Ruiming
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 45M05;33D45

description: In this paper we derive some asymptotic formulas for the $q$-Gamma function $Γ_{q}(z)$ for $q$ tending to 1.
description: 10 pages
Mediated Homogenization
Creators: name: Burgarth, Daniel
name: Giovannetti, Vittorio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Homogenization protocols model the quantum mechanical evolution of a system to a fixed state independently from its initial configuration by repeatedly coupling it with a collection of identical ancillas. Here we analyze these protocols within the formalism of "relaxing" channels providing an easy to check sufficient condition for homogenization. In this context we describe mediated homogenization schemes where a network of connected qudits relaxes to a fixed state by only partially interacting with a bath. We also study configurations which allow us to introduce entanglement among the elements of the network. Finally we analyze the effect of having competitive configurations with two different baths and we prove the convergence to dynamical equilibrium for Heisenberg chains.
description: 6 pages, 6 figures
A novel background reduction strategy for high level triggers and processing in gamma-ray Cherenkov detectors
Creators: name: Cabras, G.
name: De Angelis, A.
name: De Lotto, B.
name: De Maria, M. M.
name: De Sabata, F.
name: Mansutti, O.
name: Frailis, M.
name: Persic, M.
name: Bigongiari, C.
name: Doro, M.
name: Mariotti, M.
name: Peruzzo, L.
name: Saggion, A.
name: Scalzotto, V.
name: Paoletti, R.
name: Scribano, A.
name: Turini, N.
name: Moralejo, A.
name: Tescaro, D.
name: Collaboration, the MAGIC
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma ray astronomy is now at the leading edge for studies related both to fundamental physics and astrophysics. The sensitivity of gamma detectors is limited by the huge amount of background, constituted by hadronic cosmic rays (typically two to three orders of magnitude more than the signal) and by the accidental background in the detectors. By using the information on the temporal evolution of the Cherenkov light, the background can be reduced. We will present here the results obtained within the MAGIC experiment using a new technique for the reduction of the background. Particle showers produced by gamma rays show a different temporal distribution with respect to showers produced by hadrons; the background due to accidental counts shows no dependence on time. Such novel strategy can increase the sensitivity of present instruments.
description: 4 pages, 3 figures, Proc. of the 9th Int. Syposium "Frontiers of Fundamental and Computational Physics" (FFP9), (AIP, Melville, New York, 2008, in press)
Avoider robot design to dim the fire with dt basic mini system
Creators: name: Prasetyo, Eri
name: R., Wahyu K.
name: Prabowo, Bumi Prabu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Avoider robot is mean robot who is designed to avoid the block in around. Except that, this robot is also added by an addition application to dim the fire. This robot is made with ultrasonic sensor PING. This sensor is set on the front, right and left from robot. This sensor is used robot to look for the right street, so that robot can walk on. After the robot can look for the right street, next accomplished the robot is looking for the fire in around. And the next, dim the fire with fan. This robot is made with basic stamp 2 micro-controller. And that micro-controller can be found in dt-basic mini system module. This robot is made with servo motor on the right and left side, which is used to movement.
description: 5 pages, 5 figures, IES Conference
The Efficacy of a Virtual Reality-Based Mindfulness Intervention
Creators: name: Yildirim, Caglar
name: OGrady, Tara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Mindfulness can be defined as increased awareness of and sustained attentiveness to the present moment. Recently, there has been a growing interest in the applications of mindfulness for empirical research in wellbeing and the use of virtual reality (VR) environments and 3D interfaces as a conduit for mindfulness training. Accordingly, the current experiment investigated whether a brief VR-based mindfulness intervention could induce a greater level of state mindfulness, when compared to an audio-based intervention and control group. Results indicated two mindfulness interventions, VR-based and audio-based, induced a greater state of mindfulness, compared to the control group. Participants in the VR-based mindfulness intervention group reported a greater state of mindfulness than those in the guided audio group, indicating the immersive mindfulness intervention was more robust. Collectively, these results provide empirical support for the efficaciousness of a brief VR-based mindfulness intervention in inducing a robust state of mindfulness in laboratory settings.
description: 2020 IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR)
Optimal Tracking Controller Design for a Small Scale Helicopter
Creators: name: Budiyono, Agus
name: Wibowo, Singgih S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: C.3

description: A model helicopter is more difficult to control than its full scale counterparts. This is due to its greater sensitivity to control inputs and disturbances as well as higher bandwidth of dynamics. This works is focused on designing practical tracking controller for a small scale helicopter following predefined trajectories. A tracking controller based on optimal control theory is synthesized as part of the development of an autonomous helicopter. Some issues in regards to control constraints are addressed. The weighting between state tracking performance and control power expenditure is analyzed. Overall performance of the control design is evaluated based on its time domain histories of trajectories as well as control inputs.
description: Uploaded by ICIUS2007 Conference Organizer on behalf of the author(s). 9 pages, 12 figures, 3 tables, 1 appendix
Gas and dust spectra of the D' type symbiotic star HD330036
Creators: name: Angeloni, R.
name: Contini, M.
name: Ciroi, S.
name: Rafanelli, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a comprehensive and self-consistent modelling of the D' type symbiotic star (SS) HD330036 from radio to UV. Within a colliding-wind scenario, we analyse the continuum, line and dust spectra by means of SUMA, a code that simulates the physical conditions of an emitting gaseous cloud under the coupled effect of ionization from an external radiation source and shocks. We find that the UV lines are emitted from high density gas between the stars downstream of the reverse shock, while the optical lines are emitted downstream of the shock propagating outwards the system. As regards with the continuum SED, three shells are identified in the IR, at 850K, 320 K and 200 K with radii r = 2.8 10^13 cm, 4 10^14$ cm, and 10^15 cm, respectively, adopting a distance to Earth d=2.3 kpc: interestingly, all these shells appear to be circumbinary. The analysis of the unexploited ISO-SWS spectrum reveals that both PAHs and crystalline silicates coexist in HD330036, with PAHs associated to the internal shell at 850 K, and crystalline silicates stored into the cool shells at 320 K and 200 K. Strong evidence that crystalline silicates are shaped in a disk-like structure is derived on the basis of the relative band strengths. Finally, we suggest that shocks can be a reliable mechanism in activating the annealing and the consequent crystallization processes. We show that a consistent interpretation of gas and dust spectra emitted by SS can be obtained by models which accounts for the coupled effect of the photoionizing flux and of shocks. The VLTI/MIDI proposal recently accepted by ESO aims to verify and better constrain some of our results by means of IR interferometric observations.
description: 11 pages, 5 figures, accepted for publication in A&A on 10th May 2007
title: CO-CONSTRUIRE UN PROJET CULTUREL AUTOUR DE L’EAU EN BIBLIOTHÈQUE UNIVERSITAIRE OU UNE DÉMARCHE À PLUSIEURS PARTENAIRES
title: Co-construct a cultural project around water in an university library or a multi- partner approach
Creators: name: Peguiron, Frédérique
Publisher: name: Société française de médecine thermale
Year: 2017

description: Les fonctions des bibliothèques universitaires évoluent. Il leur appartient de faire preuve d’imagination pour rendre vivant leurs fonds documentaires imprimés et numériques. Cet article propose de mettre l’acteur-créateur au centre des préoccupations pour construire un évènement culturel à plusieurs autour du sujet des eaux thermales. La définition des acteurs selon leurs activités d’apprenant, d’enseignant, de recherche ou d’artiste autour de l’eau, permet d’avancer une méthode de travail pour proposer un modèle de co-construction du projet culturel Memoria Aquae.
description: The functions of university libraries are changing. They have to be imaginative, to make their printed and digital holdings alive. This article proposes to put “the actor-creator” at the center of the preoccupations. The goal is to build a cultural event for several, around the subject of “thermal waters”. Defining the actors according to their activities as learner, teacher, research or artist around water, makes it possible to advance a working method to propose a model of “co-construction” of the cultural project Memoria Aquae.
Two problems in discrete mathematics
Creators: name: Chiarelli, John
Publisher: name: No Publisher Supplied
Year: 2020

description: This thesis centers around two major projects that I have undertaken in the subject of discrete mathematics. The first project, discussed in Chapters 3-7, pertains to the stable matching problem, and puts particular focus on a relaxation of the notion of stability that we call S-stability. The second project, which appears in Chapters 8 and 9, looks at the properties of boolean functions as polynomials.The stable matching problem is a well-known problem in discrete mathematics; a full background on the topic appears in Chapter 2. Our investigations into the stable matching problem center around the operation psi:E(G(I))ightarrow E(G(I)), which we establish a framework for in Chapter 3 and define in Chapter 4; we show that for sufficiently large k, psi_I^k maps everything to a set of edges that we call the hub, and give algorithms for evaluating psi_I(S) for specific values of S. In later chapters, we extend results on the lattice structure of stable matchings to the discussed weaker notions of stability (Chapter 5) and consider the polytope of fractional matchings for these same weaker notions (Chapter 6). We also reflect on graphs represented by instances with every edge in the hub (Chapter 7).It is well known that any boolean function f:{0,1}^nightarrow{0,1} can be represented as a unique multilinear polynomial. In Chapter 8, we consider a sensitivity measure that we call the maxonomial hitting set size, and apply it in order to improve a result by Nisan and Szegedy on the maximum number of variables in a low degree boolean polynomial (Cref{thm:main}).footnote{This section was previously published on ArXiv in 2018, and was published in Combinatorica earlier this year cite{CHS19}.} In Chapter 9, we focus on expanding our understanding of the largest possible maxonomial hitting set size for a degree d boolean function.
TA'LIM OLISH HUQUQI INSONNING ASOSIY HUQUQ VA ERKINLIKLARI YIGʻINDISI SIFATIDA
Creators: name: Sharapov, Shuxrat
Publisher: name: Zenodo
Year: 2023

description: Ta’lim olish huquqi insonning asosiy huquqi boʻlib, shaxs erkinligi va imkoniyatlarining asosiy tarkibiy qismidir. Shunday qilib, bu shaxslar va jamiyatlarning umumiy rivojlanishi va farovonligi uchun zarurdir. Ushbu baholashda biz asosiy inson huquqi sifatida ta’lim olish huquqining ahamiyatini va uning erkinlik va imkoniyatlarni rivojlantirishga ta’sirini oʻrganamiz.
Observation of room-temperature ferroelectricity in tetragonal strontium titanate thin films on SrTiO3 (001) substrates
Creators: name: Kim, Yong Su
name: Kim, D. J.
name: Kim, T. H.
name: Noh, T. W.
name: Choi, J. S.
name: Park, B. H.
name: Yoon, J. -G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the ferroelectric properties of strontium titanate (STO) thin films deposited on SrTiO3 (001) substrate with SrRuO3 electrodes. The STO layer was grown coherently on the SrTiO3 substrate without in-plane lattice relaxation, but its out-of-plane lattice constant increased with a decrease in the oxygen pressure during deposition. Using piezoresponse force microscopy and P-V measurements, we showed that our tetragonal STO films possess room-temperature ferroelectricity. We discuss the possible origins of the observed ferroelectricity.
Tsallis distribution from minimally selected order statistics
Creators: name: Wilk, G.
name: Wlodarczyk, Z.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate that selection of the minimal value of ordered variables leads in a natural way to its distribution being given by the Tsallis distribution, the same as that resulting from Tsallis nonextensive statistics. The possible application of this result to the multiparticle production processes is indicated.
description: Presented by G.Wilk at the Int. Conf. on Complexity, Metastability and Nonextensivity, Dept. of Physics and Astronomy, Univ. of Catania, Catania, 1-5 July 2007, Italy. To appear in the proceedings
IZAZOV 2020 - Pravila i zadaci
Creators: name: Miljković, Nadica
name: Badnjarević, Bogdan
name: Radojković, Pavle
name: Valzorio, Nikola
Publisher: name: Zenodo
Year: 2021
Subjects: electrical measurements
project assignments
Python
Arduino
microcontroller

description: This is a list of assignments i.e. challenges for course on Measurements in electrical and computer engineering (in Serbian: Merni sistemi u računarstvu, http://automatika.etf.rs/sr/13e053msr) covering traditional (e.g. application of oscilloscope) and modern (e.g. application of microcontrollers) electrical measurements.
High-Frequency Properties of a Graphene Nanoribbon Field-Effect Transistor
Creators: name: Ryzhii, M.
name: Satou, A.
name: Ryzhii, V.
name: Otsuji, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose an analytical device model for a graphene nanoribbon field-effect transistor (GNR-FET). The GNR-FET under consideration is based on a heterostructure which consists of an array of nanoribbons clad between the highly conducting substrate (the back gate) and the top gate controlling the dc and ac source-drain currents. Using the model developed, we derive explicit analytical formulas for the GNR-FET transconductance as a function of the signal frequency, collision frequency of electrons, and the top gate length. The transition from the ballistic and to strongly collisional electron transport is considered.
description: 7 pages, 7 figures