cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Approximate filtering via discrete dual processes
Creators: name: King, Guillaume Kon Kam
name: Pandolfi, Andrea
name: Piretto, Marco
name: Ruggiero, Matteo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider the task of filtering a dynamic parameter evolving as a diffusion process, given data collected at discrete times from a likelihood which is conjugate to the marginal law of the diffusion, when a generic dual process on a discrete state space is available. Recently, it was shown that duality with respect to a death-like process implies that the filtering distributions are finite mixtures, making exact filtering and smoothing feasible through recursive algorithms with polynomial complexity in the number of observations. Here we provide general results for the case of duality between the diffusion and a regular jump continuous-time Markov chain on a discrete state space, which typically leads to filtering distribution given by countable mixtures indexed by the dual process state space. We investigate the performance of several approximation strategies on two hidden Markov models driven by Cox-Ingersoll-Ross and Wright-Fisher diffusions, which admit duals of birth-and-death type, and compare them with the available exact strategies based on death-type duals and with bootstrap particle filtering on the diffusion state space as a general benchmark.
Evaluating the Effectiveness of Height Visualizations for Improving Gestural Communication at Distributed Tables
Creators: name: Genest, A. M.
name: Gutwin, C.
Publisher: name: ACM
Year: 2012

description: In co-located collaboration, people use the space above the table for deictic gestures, and height is an important part of these gestures. However, when collaborators work at distributed tables, we know little about how to convey information about gesture height. A few visualizations have been proposed, but these have not been evaluated in detail. To better understand how remote embodiments can show gesture height, we developed several visualizations and evaluated them in three studies. First, we show that touch visualizations significantly improve people's accuracy in identifying the type and target of a gesture. Second, we show that visualizations of height above the table help to convey gesture qualities such as confidence, emphasis, and specificity. Third, we show that people quickly make use of height visualizations in realistic collaborative tasks, and that height-enhanced embodiments are strongly preferred. Our work illustrates several designs for effective visualization of height, and provides the first comprehensive evidence of the value of height information as a way to improve gestural communication in distributed tabletop groupware.
Перетворення аеропортів на об'єкти туристичного інтересу та суспільні туристичні ресурси
Creators: name: Galyna, Agieieva
Publisher: name: Zenodo
Year: 2022
Subjects: містобудування
аеропорт
архітектурне середовище
приаеродромна територія
туристичний інтерес
туристичні дестинації
суспільні туристичні ресурси
архітектурні ресурси
культурологічні ресурси

description: Транзитний потенціал України, попри розгорнуту Росією агресію, має бути відновлений і значно збільшений активізацією вітчизняного та міжнародного туризму. Первинною проблемою при цьому стане розвинення вітчизняної транспортної інфраструктури, зокрема, її авіаційної складової. Не зважаючи на сьогоденну кризисну ситуацію, авіація, авіаційні перевезення залишаються високо конкурентною галуззю, тісно пов’язаною з індустрією туризму. Наземна складова авіаційних перевезень – аеропорти та приаеродромні території, мають, з одного боку, статус територій з обмеженою забудовою, з іншого – потенціал для пошуку та реалізації нових підходів до перетворення аеропорту та його складових на об’єкти туристичного інтересу, а окремих зон аеропорту – на суспільні туристичні ресурси.
Spin moment formation and reduced orbital polarization in LaNiO$_3$/LaAlO$_3$ superlattice: LDA+U study
Creators: name: Han, Myung Joon
name: van Veenendaal, Michel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Density functional band calculations have been performed to study LaNiO$_3$/LaAlO$_3$ superlattices. Motivated by recent experiments reporting the magnetic and metal-insulator phase transition as a function of LaNiO$_3$ layer thickness, we examined the electronic structure, magnetic properties, and orbital occupation depending on the number of LaNiO$_3$ layers. Calculations show that the magnetic phase is stabler than the nonmagnetic for finite and positive $U$ values. The orbital polarization is significantly reduced by $U$ even in the magnetic regions. The implications of the results are discussed in comparison to recent experimental and theoretical studies within the limitations of the LDA$+U$ method.
description: 5+ pages, 5 figures
The influence of plant functional groups on ecosystem functions in a grassland in northern Canada
Creators: name: McLaren, Jennie Renée
Publisher: name: University of British Columbia
Year: 2010

description: Human development, climate change, diseases and habitat degradation and loss are resulting in species extinction rates up to a thousand times faster than pre‐human levels. Biodiversity ecosystem functioning research examines how this loss of species and changes in the composition of plant communities are likely to influence numerous ecosystem functions. The effects of biodiversity loss on ecosystem properties may also be highly dependent on the identity of the organisms lost. I investigated the influence of plant functional group identity in determining ecosystem properties. I established a removal experiment in a grassland in northern Canada in 2003 with four treatments: a no‐removal control and independent removal of forbs, graminoids and legumes. As biodiversity loss is occurring in concert with environmental change, I crossed removals with a fertilizer and a mycorrhizal reduction (fungicide) treatment to determine the context dependency of effects. I showed that graminoids have the largest influence on ecosystem properties in this community, despite not being the most abundant group. Short‐term (4 years) biomass compensation for the removals showed no compensation for graminoid removal, but after 7 years there was full biomass compensation for this treatment. Light interception, soil moisture, and soil nutrients were all largely determined by the presence of graminoids in the plant community, and surprisingly legumes had very few effects on any ecosystem property. Graminoids also showed plant‐driven environmental effects on leaf decomposition, although no removal treatment resulted in changes in the decomposition of roots. Graminoids promoted decomposition of leaf litter through 2 mechanisms: influence on the decomposition microenvironment and changes in the litter composition. Finally, I have demonstrated that very few of the effects of functional group identity were context dependent on either fertilization or fungicide treatments. These results highlight the importance of considering plant functional group identity when predicting the effects of species loss, and indicate that plant identity, more so than dominance, determines effects on ecosystem properties.
A Comparative Analysis on Widely used Web Frameworks to Choose the Requirement based Development Technology
Creators: name: Anjum, Nirjhor
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 461204
subject: Programming languages
classificationCode: 461301
subject: Coding, information theory and compression
classificationCode: 460611
subject: Performance evaluation
classificationCode: 461299
subject: Software engineering not elsewhere classified

description: In this modern world of technology there are hundreds of programming languages that are being used in the IT industry for building website and software. It is not a standard practice to use raw programming codes, rather everyone prefers to use Framework which is nothing but a big collection of ready libraries, packages and modules for making the development quicker. For this reason, experts have developed different Frameworks based on different popular programming languages. Now, it becomes really a confusing and challenging matter for companies, developers and managers while they want to choose a framework for developing their software products. As there are variety of frameworks of different programming languages, the technology decision makers get confused while choosing a framework. Considering this as a big problem of the software industry our aim is to test, analyze, assess, and propose a set of guidelines for choosing a framework based on the requirement of a software product.
Comparative stability of cloned and non-cloned code: an empirical study
Creators: name: Mondal, Manishankar
name: Roy, Chanchal K.
name: Rahman, Md. Saidur
name: Saha, Ripon K.
name: Krinke, Jens
name: Schneider, Kevin A.
Publisher: name: ACM
Year: 2012

description: Code cloning is a controversial software engineering practice due to contradictory claims regarding its effect on software maintenance. Code stability is a recently introduced measurement technique that has been used to determine the impact of code cloning by quantifying the changeability of a code region. Although most of the existing stability analysis studies agree that cloned code is more stable than non-cloned code, the studies have two major flaws: (i) each study only considered a single stability measurement (e.g., lines of code changed, frequency of change, age of change); and, (ii) only a small number of subject systems were analyzed and these were of limited variety. In this paper, we present a comprehensive empirical study on code stability using three different stability measuring methods. We use a recently introduced hybrid clone detection tool, NiCAD, to detect the clones and analyze their stability in four dimensions: by clone type, by measuring method, by programming language, and by system size and age. Our four-dimensional investigation on 12 diverse subject systems written in three programming languages considering three clone types reveals that: (i) Type-1 and Type-2 clones are unstable, but Type-3 clones are not; (ii) clones in Java and C systems are not as stable as clones in C# systems; (iii) a system's development strategy might play a key role in defining its comparative code stability scenario; and, (iv) cloned and non-cloned regions of a subject system do not follow a consistent change pattern.
Overlapping cortical regions for reading and temporal processing in developmental dyslexia
Creators: name: Partanen, Marita Helmi
Publisher: name: University of British Columbia
Year: 2010

description: Children with developmental dyslexia have difficulty learning to read. These children may also have deficits in temporal processing, which is the perception and integration of rapidly presented stimuli. Behavioural research indicates a link between reading and temporal processing ability; however, the cortical relationship between these two skills has not been established. This thesis examined whether tasks of reading and temporal processing activate similar cortical regions in children with average reading ability and in children with dyslexia. Using functional magnetic resonance imaging (fMRI), activity for two reading tasks (phonological and orthographic) and two temporal processing tasks (dichotic pitch and global motion perception) was assessed. Three regions of interest were established in each participant: the lateral occipital cortex (LOC) and areas engaged by dichotic pitch and global motion tasks. Results demonstrated that both groups had increased activity in bilateral LOC during reading. In average readers, left LOC was more active than right regions during the phonological task, while dyslexic readers showed equivalent activity between left and right LOC for both reading tasks. The dichotic pitch regions did not show any evidence of activation during reading in either group. However, children with dyslexia exhibited significant activity in right global motion regions during the phonological task, but only on the difficult word condition. Average readers did not illustrate activation in global motion areas during reading. The current results suggest that LOC is involved with the reading process and children with dyslexia may have a deficit in left LOC. It was hypothesized that dyslexic readers may have increased attentional processing and recruitment from additional cortical regions during difficult tasks, which may explain the similar activity between global motion and phonological reading. Since there were no similar regions between dichotic pitch and reading, this suggests that these may not be directly related through cortical activity. The current results provide novel evidence that reading and visual temporal processing may involve some of the same cortical areas, at least in children with dyslexia. Future research will investigate links between reading and temporal processing in younger children and will examine differences in white matter connectivity.
Quark energy loss in semi-inclusive deep inelastic scattering of leptons on nuclei
Creators: name: Song, Li-Hua
name: Duan, Chun-Gui
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Semi-inclusive deep inelastic scattering on nuclear targets is an ideal tool to study the energy loss effect of an outgoing quark in a nuclear medium. By means of the short hadron formation time, the experimental data with quark hadronization occurring outside the nucleus are picked out. A leading-order analysis is performed for the hadron multiplicity ratios as a function of the energy fraction on helium, neon, and copper nuclei relative to deuteron for the various identified hadrons. It is shown that the nuclear effects on parton distribution functions can be neglected. It is found that the theoretical results considering the nuclear modification of fragmentation functions due to quark energy loss are in good agreement with the experimental data. Whether the quark energy loss is linear or quadratic with the path length is not determined. The obtained energy loss per unit length is 0.38 \pm 0.03 GeV/fm for an outgoing quark by the global fit.
Muon spin relaxation and neutron diffraction investigations of quadrupolar and magnetically ordered states of YbRu2Ge2
Creators: name: Jeevan, H. S.
name: Adroja, D. T.
name: Hillier, A. D.
name: Hossain, Z.
name: Ritter, C.
name: Geibel, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic and quadrupolar ordered states of polycrystalline YbRu2Ge2 have been investigated using zero-field muon spin relaxation (μSR) and neutron diffraction measurements. Specific heat measurements show three successive phase transitions, with decreasing temperature from a paramagnetic to a quadrupolar state at T0 ~ 10 K, from the quadrupolar to a magnetic state at T1 ~ 6.5 K and a possible change in the magnetic ground state at T2 ~ 5.5 K. Clear evidence for the magnetic transition below 7 K (spectrum at 8 K reveals paramagnetic state) and a likely change in the magnetic structure near 5.8 K is observed in the zero-field μSR measurements. The μSR data, however, do not reveal any signature of magnetic order in the temperature range 8 - 45 K. This result is further supported by neutron diffraction measurements, where clear magnetic Bragg peaks have been observed below 8 K, but not above it. Below 8 K, the magnetic Bragg peaks can be characterized by an incommensurate antiferromagnetic ordering with the propagation vector q = [0.352, 0, 0] and the magnetic moment 2.9(3) μB of Yb along the b-axis. These results are discussed in terms of quadrupolar ordered and magnetically ordered states.
description: 16 pages, 8 figures, PRB-accepted-2011
Ultra-broadband and compact 2$\times$2 3-dB silicon adiabatic coupler based on supermode-injected adjoint shape optimization
Creators: name: Chen, Hongliang
name: Su, Guangchen
name: Fu, Xin
name: Yang, Lin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The 2$\times$2 3-dB couplers are one of the most widely used and important components in silicon photonics. We propose an ultra-broadband and compact 2$\times$2 3-dB adiabatic coupler defined by b-splines and optimized with an efficient supermode-injected adjoint shape optimization. By employing mode adiabatic evolution and mode coupling at two different wavelength ranges, respectively, we achieve an ultra-broad bandwidth of 530 nm from 1150nm to1680nm with a power imbalance below $\pm$0.76 dB in a compact coupling length of 30 $μm$ according to our simulation results. The supermode-injected adjoint shape optimization can also be applied to the design of other photonic devices based on supermode manipulation.
GPGPU Processing in CUDA Architecture
Creators: name: Ghorpade, Jayshree
name: Parande, Jitendra
name: Kulkarni, Madhura
name: Bawaskar, Amit
Publisher: name: arXiv
Year: 2012
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The future of computation is the Graphical Processing Unit, i.e. the GPU. The promise that the graphics cards have shown in the field of image processing and accelerated rendering of 3D scenes, and the computational capability that these GPUs possess, they are developing into great parallel computing units. It is quite simple to program a graphics processor to perform general parallel tasks. But after understanding the various architectural aspects of the graphics processor, it can be used to perform other taxing tasks as well. In this paper, we will show how CUDA can fully utilize the tremendous power of these GPUs. CUDA is NVIDIA's parallel computing architecture. It enables dramatic increases in computing performance, by harnessing the power of the GPU. This paper talks about CUDA and its architecture. It takes us through a comparison of CUDA C/C++ with other parallel programming languages like OpenCL and DirectCompute. The paper also lists out the common myths about CUDA and how the future seems to be promising for CUDA.
description: 16 pages, 5 figures, Advanced Computing: an International Journal (ACIJ) 2012
SimCad: An extensible and faster clone detection tool for large scale software systems
Creators: name: Uddin, M.S.
name: Roy, C.K.
name: Schneider, K.A.
Publisher: name: IEEE
Year: 2013

description: Code cloning is an inevitable phenomenon in evolution of software systems. To reduce the harmful effects of clones in software evolution, they need to be identified correctly as well in a time efficient way. There might be various types of clones in a software system. Earlier research shows detection of near-miss clones in large datasets appears to be costly in terms of time and memory. Among the clone detection tools available in practice, not very many of them are found effective in that regard. In this paper we present a standalone clone detection tool SimCad. It is based on a highly scalable and faster clone detection algorithm designed to detect both exact and near-miss clones in large-scale software systems. One of the potential aspects of SimCad is that its clone detection function is made more portable by packaging it into a library called SimLib. Thus, SimLib now can be used as an off-the-shelf clone detection library that can be easily integrated into other applications that are designed to work based on detected clones. For example, a standalone tool or an Integrated Development Environment (IDE) plugin can use SimLib for realtime clone detection while providing its own services like clone visualization and/or clone management functionalities. We hope that both researchers and developers would enjoy and utilize the benefit of using these tools in different aspects of detection and management of clones in software.
Insight into a method co-change pattern to identify highly coupled methods: An empirical study
Creators: name: Mondal, M.
name: Roy, C.K.
name: Schneider, K.A.
Publisher: name: IEEE
Year: 2013

description: In this paper, we describe an empirical study of a unique method co-change pattern that has the potential to pinpoint design deficiency in a software system. We automatically identify this pattern by inspecting the method co-change history using reasonable constraints on method association rules. We also investigate the effect of code clones on the method co-changes identified according to the pattern, because there is a common intuition that clone fragments from the same clone class often require corresponding changes to ensure they remain consistent with each other. According to our in-depth investigation on hundreds of revisions of seven open-source software systems considering three types of clones (Type 1, Type 2, Type 3), our identified pattern helps us detect methods that are logically coupled with multiple other methods and that exhibit a significantly higher modification frequency than other methods. We call the methods detected by the pattern MMCGs (Methods appearing in Multiple Commit Groups) considering the pattern semantic. MMCGs can be considered as the candidates for restructuring in order to minimize coupling as well as to reduce the change-proneness of a software system. According to our observation, code clones have a significant effect on method co-changes as well as on MMCGs. We believe that clone refactoring can help us minimize evolutionary coupling among methods.
Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
Creators: name: Arseyev, P. I.
name: Maslova, N. S.
name: Mantsevich, V. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigated the peculiarities of non-equilibrium charge states and spin configurations in the system of two strongly coupled quantum dots (QDs) weakly connected to the electrodes in the presence of Coulomb correlations. We analyzed the modification of non-equilibrium charge states and different spin configurations of the system in a wide range of applied bias voltage and revealed well pronounced ranges of system parameters where negative tunneling conductivity appears due to the Coulomb correlations.
description: 10 pages, 6 figures
On the Effectiveness of Simhash for Detecting Near-Miss Clones in Large Scale Software Systems
Creators: name: Uddin, M.S.
name: Roy, C.K.
name: Schneider, K.A.
name: Hindle, A.
Publisher: name: IEEE
Year: 2011

description: Clone detection techniques essentially cluster textually, syntactically and/or semantically similar code fragments in or across software systems. For large datasets, similarity identification is costly both in terms of time and memory, and especially so when detecting near-miss clones where lines could be modified, added and/or deleted in the copied fragments. The capability and effectiveness of a clone detection tool mostly depends on the code similarity measurement technique it uses. A variety of similarity measurement approaches have been used for clone detection, including fingerprint based approaches, which have had varying degrees of success notwithstanding some limitations. In this paper, we investigate the effectiveness of simhash, a state of the art fingerprint based data similarity measurement technique for detecting both exact and near-miss clones in large scale software systems. Our experimental data show that simhash is indeed effective in identifying various types of clones in a software system despite wide variations in experimental circumstances. The approach is also suitable as a core capability for building other tools, such as tools for: incremental clone detection, code searching, and clone management.
COOPERATIVE LEARNING IN PRIMARY SCHOOL ENGLISH LANGUAGE TEACHING
Creators: name: Saytieva, Gulmira
Publisher: name: Zenodo
Year: 2024

description: Cooperative learning is an effective pedagogical approach in primary school English Language Teaching (ELT), emphasizing collaboration and communication. This article explores the benefits and strategies of implementing cooperative learning in the ELT context. It discusses how cooperative learning enhances language development, communication skills, and creates a positive classroom environment. The article also emphasizes the importance of social skills, cultural awareness, and inclusive practices in cooperative learning. Strategies such as varied activities, technology integration, and clear learning objectives are highlighted. The article concludes by stressing the long-term impact of cooperative learning on language proficiency and essential life skills.
Spectral properties of thermal fluctuations on simple liquid surfaces below shot noise levels
Creators: name: Aoki, Kenichiro
name: Mitsui, Takahisa
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the spectral properties of thermal fluctuations on simple liquid surfaces, sometimes called ripplons. Analytical properties of the spectral function are investigated and are shown to be composed of regions with simple analytic behavior with respect to the frequency or the wave number. The derived expressions are compared to spectral measurements performed orders of magnitude below shot noise levels, which is achieved using a novel noise reduction method. The agreement between the theory of thermal surface fluctuations and the experiment is found to be excellent.
description: 9 pages, 5 figures
A short-time drift propagator approach to the Fokker-Planck equation
Creators: name: Mangthas, Wisit
name: Ngamsaad, Waipot
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The Fokker-Planck equation is a partial differential equation that describes the evolution of a probability distribution over time. It is used to model a wide range of physical and biological phenomena, such as diffusion, chemical reactions, and population dynamics. Solving the Fokker-Planck equation is a difficult task, as it involves solving a system of coupled nonlinear partial differential equations. In general, analytical solutions are not available and numerical methods must be used. In this research, we propose a novel approach to the solution of the Fokker-Planck equation in a short time interval. The numerical solution to the equation can be obtained iteratively using a new technique based on the short-time drift propagator. This new approach is different from the traditional methods, as the state-dependent drift function has been removed from the multivariate Gaussian integral component and is instead presented as a state-shifted element. We evaluated our technique employing a fundamental Wiener process with constant drift components in both one- and two-dimensional space. The results of the numerical calculation were found to be consistent with the exact solution. The proposed approach offers a promising new direction for research in this area.
description: 6 pages, 2 figures, accepted for publication in J. Korean Phys. Soc
Influence of gravitational waves on quantum multibody states
Creators: name: Yan, Jiatong
name: Zhang, Baocheng
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Based on the freely-falling Unruh-Dewitt model, we study the influence of gravitational waves on the quantum multibody states, i.e. the twin-Fock (TF) state and the mixture of Dicke states. The amount of entanglement of quantum many-body states decreases first and then increases with increasing frequency of gravitational waves. In particular, for some fixed frequencies of gravitational waves, entanglement will increase with the increasing amplitude of gravitational waves, which is different from the usual thought of gravity-induced decoherence and could provide a novel understanding for the quantum property of gravitational waves.
description: accepted by Phys. Rev. D
Maternal and fetal methionine metabolism and the implications on programming of the hypothalamic pituitary adrenal axis by prenatal alcohol exposure
Creators: name: O'Neill, Ryan Patrick
Publisher: name: University of British Columbia
Year: 2010

description: Chronic ethanol exposure is known to disrupt the methionine cycle in liver of adult rats. Alterations in the methionine cycle are associated with changes in tissue methylation capacity and may affect DNA and histone methylation thereby altering epigenetic regulation of gene expression, causing long-term phenotypic changes. Data from our lab and others have shown that prenatal alcohol exposure (PAE) reprograms the hypothalamic-pituitary-adrenal (HPA) axis such that HPA tone is increased throughout life. That is, PAE animals show increased HPA responsiveness and/or delayed or deficient recovery to basal levels following exposure to stressors. These alterations persist into adulthood, can have negative consequences for health, and may be mediated by metabolic changes induced by prenatal ethanol exposure. To explore this hypothesis, mass-spectrometry and real time PCR were used to quantify several of the primary metabolites and enzymes involved in methionine metabolism using plasma and liver samples from pregnant dams and fetuses from ethanol (E), pair-fed (PF) and ad lib fed control (C) groups on gestation day 21. Mass spectrometry analysis of plasma revealed increases (p<0.05) in homocysteine levels in E dams and increases (p<0.02) in methionine levels in both E dams and fetuses compared to their PF and C counterparts. Quantification of hepatic enzymes by real-time PCR showed significantly decreased mRNA levels (p≤0.05) of maternal methionine adenosyltransferase (MAT) 1A, MAT2A, methionine synthase (MS), and phosphatidylethanolamine N-methyl transferase (PEMT)in addition to decreased fetal MAT1A mRNA. Together these data demonstrate marked alterations in methionine metabolism during prenatal exposure to ethanol.
A generative layout approach for rooted tree drawings
Creators: name: Schulz, H.-J.
name: Akbar, Z.
name: Maurer, F.
Publisher: name: IEEE
Year: 2013

description: In response to the large number of existing tree layouts, generic “meta-layouts” have recently been proposed. These generic approaches utilize layout design spaces to pinpoint a tree drawing with desired characteristics in the wealth of available drawing options and parameters. While design-space-based generic layouts work well for the confined set of implicit space-filling tree layouts, they have so far eluded their extension to explicit node-link diagrams. In order to produce both, implicit and explicit tree layouts, this paper parts with the descriptive nature of the design spaces and instead takes a generative approach based on operators. As these operators can be combined into operator sequences and be used at different stages of the layout process, a small operator set already suffices to yield a large number of different tree layouts. To this end, we present a generic tree layout pipeline and give examples of suitable layout operators to plug into the pipeline. A prototypical implementation of our pipeline and operators is presented, and it is illustrated with space-filling and node-link examples. Furthermore, the paper presents results from a user study evaluating our generative approach as it is realized by the prototype.
On an Optimal Stopping Problem with a Discontinuous Reward
Creators: name: Mackay, Anne
name: Vachon, Marie-Claude
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Computational Finance (q-fin.CP)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: 91G80, 62P05, 60G40, 35R35

description: We study an optimal stopping problem with an unbounded, time-dependent and discontinuous reward function.This problem is motivated by the pricing of a variable annuity contract with guaranteed minimum maturity benefit, under the assumption that the policyholder's surrender behaviour maximizes the risk-neutral value of the contract. We consider a general fee and surrender charge function, and give a condition under which optimal stopping always occurs at maturity. Using an alternative representation for the value function of the optimization problem, we study its analytical properties and the resulting surrender (or exercise) region. In particular, we show that the non-emptiness and the shape of the surrender region are fully characterized by the fee and the surrender charge functions, which provides a powerful tool to understand their interrelation and how it affects early surrenders and the optimal surrender boundary. Under certain conditions on these two functions, we develop three representations for the value function; two are analogous to their American option counterpart, and one is new to the actuarial and American option pricing literature.
Dark Matter Search with sub-keV Germanium Detectors at the China Jinping Underground Laboratory
Creators: name: Yue, Qian
name: Wong, Henry T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Germanium detectors with sub-keV sensitivities open a window to search for low-mass WIMP dark matter. The CDEX-TEXONO Collaboration is conducting the first research program at the new China Jinping Underground Laboratory with this approach. The status and plans of the laboratory and the experiment are discussed.
description: 4 pages, 2 figures, Proceeding of TAUP-2011 Conference
Novel Bose-Einstein Interference in the Passage of a Fast Particle in a Dense Medium
Creators: name: Wong, Cheuk-Yin
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When an energetic particle collides coherently with many medium particles at high energies, the Bose-Einstein symmetry with respect to the interchange of the exchanged virtual bosons leads to a destructive interference of the Feynman amplitudes in most regions of the phase space but a constructive interference in some other regions of the phase space. As a consequence, the recoiling medium particles have a tendency to come out collectively along the direction of the incident fast particle, each carrying a substantial fraction of the incident longitudinal momentum. Such an interference appearing as collective recoils of scatterers along the incident particle direction may have been observed in angular correlations of hadrons associated with a high-$p_T$ trigger in high-energy AuAu collisions at RHIC.
description: 10 pages, 2 figures, invited talk presented at the 35th Symposium on Nuclear Physics, Cocoyoc, Mexico, January 3, 2012, to be published in IOP Conference Series
Workshop on Data Curation to Researchers at HKU
Creators: name: Ruolan
Publisher: name: Zenodo
Year: 2023
Subjects: Data curation, data sharing, data reuse

description: The audience of the workshop is researchers at HKU. This workshop is to improve the data curation awareness of researchers. By introducing the current data management policy and showing some usage of data repositories, researchers can use data management tools to better manage research-related data.
description: {"references": ["Abbott, D. (2008). DCC Briefing Paper: Annotation.", "Marcial, L. H., & Hemminger, B. M. (2010). Scientific data repositories on the Web: An initial survey. Journal of the American Society for Information Science and Technology, 61(10), 2029-2048.", "Wilkinson, M. D., Dumontier, M., Aalbersberg, I. J., Appleton, G., Axton, M., Baak, A., Blomberg, N., Boiten, J.-W., da Silva Santos, L. B., & Bourne, P. E. (2016). The FAIR Guiding Principles for scientific data management and stewardship. Scientific data, 3(1), 1-9."]}
Exploring Entities in Text with Descriptive Non-photorealistic Rendering
Creators: name: Chang, Meng-Wei
name: Collins, Christopher
Publisher: name: IEEE
Year: 2013

description: We present a novel approach to text visualization called descriptive non-photorealistic rendering which exploits the inherent spatial and abstract dimensions in text documents to integrate 3D non-photorealistic rendering with information visualization. The visualization encodes text data onto 3D models, emphasizing the relative significance of words in the text and the physical, real-world relationships between those words. Analytic exploration is supported through a collection of interactive widgets and direct multitouch interaction with the 3D models. We applied our method to analyze a collection of vehicle complaint reports from the National Highway Traffic Safety Administration (NHTSA), and through a qualitative study, we demonstrate how our system can support tasks such as comparing the reliability of different models, finding interesting facts, and revealing possible causal relations between car parts.
Film Thickness controlled photoluminescence Emission in ZnO:Si Nano-composites
Creators: name: Shabnam
name: Kant, Chhaya Ravi
name: Arun, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: As grown ZnO:Si nanocomposite films fabricated by thermal evaporation showed broad photoluiminescence (PL) spectra due to merging of four prominent peaks viz 370, 410, 470 and 520 nm. Investigations revealed the role of interface in contributing to the two blue peaks at 410 and 470 nm. While the 470 nm is found to vary with ZnO grain size and their density, the 410 nm peak is attributed to the volume of shell surrounding ZnO nanoparticles. This study shows the contribution of ZnO cluster size and their density, as influenced by film thickness, in the PL spectra of the samples.
Planetary Radio Interferometry and Doppler Experiment (PRIDE) of the JUICE mission
Creators: name: Gurvits, Leonid I.
name: Cimo, Giuseppe
name: Dirkx, Dominic
name: Pallichadath, Vidhya
name: Akins, Alexander
name: Altobelli, Nicolas
name: Bocanegra-Bahamon, Tatiana M.
name: Cazaux, Stephanie M.
name: Charlot, Patrick
name: Duev, Dmitry A.
name: Fayolle, Marie S.
name: Fogasy, Judit
name: Frey, Sandor
name: Lainey, Valery
name: Calves, Guifre Molera
name: Perger, Krisztina
name: Pogrebenko, Sergey V.
name: Said, N. Masdiana Md
name: Vallat, Claire
name: Vermeersen, Bert L. A.
name: Visser, Pieter N. A. M.
name: Wang, Kuo-Nung
name: Willner, Konrad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Planetary Radio Interferometry and Doppler Experiment (PRIDE) is a multi-purpose experimental technique aimed at enhancing the science return of planetary missions. The technique exploits the science payload and spacecraft service systems without requiring a dedicated onboard instrumentation or imposing on the existing instrumentation any special for PRIDE requirements. PRIDE is based on the near-field phase-referencing Very Long Baseline Interferometry (VLBI) and evaluation of the Doppler shift of the radio signal transmitted by spacecraft by observing it with multiple Earth-based radio telescopes. The methodology of PRIDE has been developed initially at the Joint Institute for VLBI ERIC (JIVE) for tracking the ESA's Huygens Probe during its descent in the atmosphere of Titan in 2005. From that point on, the technique has been demonstrated for various planetary and other space science missions. The estimates of lateral position of the target spacecraft are done using the phase-referencing VLBI technique. Together with radial Doppler estimates, these observables can be used for a variety of applications, including improving the knowledge of the spacecraft state vector. The PRIDE measurements can be applied to a broad scope of research fields including studies of atmospheres through the use of radio occultations, the improvement of planetary and satellite ephemerides, as well as gravity field parameters and other geodetic properties of interest, and estimations of interplanetary plasma properties. This paper presents the implementation of PRIDE as a component of the ESA's Jupiter Icy Moons Explorer (JUICE) mission.
description: JUICE collection, Space Science Reviews, 2023, 219:79
Testing of web services - A systematic mapping
Creators: name: Sharma, A.
name: Hellmann, T.D.
name: Maurer, F.
Publisher: name: IEEE
Year: 2012

description: Web services have been gaining popularity since the introduction of Service-oriented architecture and cloud computing. With more and more legacy systems migrating to service-oriented architectures and the cloud, an urgent need for proper testing techniques is becoming apparent. This paper provides an overview of the current state of research into testing of web services. To understand this subject, we conducted a systematic mapping. The results suggest that research into testing web services is still in its early stages. We provide recommendations about holes in existing research that need to be addressed and directions for future research that will have maximum novelty and potential for impact on the field.
Microscopic co-existence of superconductivity and magnetism in Ba1-xKxFe2As2
Creators: name: Wiesenmayer, Erwin
name: Luetkens, Hubertus
name: Pascua, Gwendolyne
name: Khasanov, Rustem
name: Amato, Alex
name: Potts, Heidi
name: Banusch, Benjamin
name: Klauss, Hans-Henning
name: Johrendt, Dirk
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is widely believed that, in contrast to its electron doped counterparts, the hole doped compound Ba1-xKxFe2As2 exhibits a mesoscopic phase separation of magnetism and superconductivity in the underdoped region of the phase diagram. Here, we report a combined high-resolution x-ray powder diffraction and volume sensitive muon spin rotation study of underdoped Ba1-xKxFe2As2 (0 \leq x \leq 0.25) showing that this paradigm is wrong. Instead we find a microscopic coexistence of the two forms of order. A competition of magnetism and superconductivity is evident from a significant reduction of the magnetic moment and a concomitant decrease of the magneto-elastically coupled orthorhombic lattice distortion below the superconducting phase transition.
description: 4 pages, 4 figures
Exploring 3D volumetric medical data using mobile devices
Creators: name: Seyed, Teddy
name: Rodrigues, Francisco Marinho
name: Maurer, Frank
name: Tang, Anthony
Publisher: name: IEEE
Year: 2014

description: Medical imaging specialists have traditionally used keyboard and mouse based techniques and interfaces for examining both 2D and 3D medical images, but with newer imaging technologies resulting in significantly larger volumes of 3D medical images, these techniques that have become increasingly cumbersome for imaging specialists. To replace traditional techniques, using mobile devices present an effective means for navigating and exploring complex 3D medical data sets, as they provide increased fluidity and flexibility, leveraging people's existing skills with tangible objects. 3D interactions using mobile devices may provide benefit for imaging specialists, but little is known about using these interactions in the medical imaging domain. In this paper, we explore the design of 3D interaction techniques using mobile devices and preliminary feedback from imaging specialists suggests that these interactions may be a viable solution for the medical imaging domain.
DiscoTech: A Plug-In Toolkit to Improve Handling of Disconnection and Reconnection in Real-Time Groupware
Creators: name: Roy, B.
name: Graham, T.
name: Gutwin, C.
Publisher: name: ACM
Year: 2012

description: Disconnection and reconnection are common problems for users of synchronous groupware, but these problems are not easy for developers to handle because of the wide range of scenarios and timeframes that must be considered. We have developed a new toolkit called DiscoTech that helps programmers deal with disconnection. The toolkit is based on five design dimensions that determine how stored information can be manipulated as the system waits for an absent user to rejoin, and how information should be replayed upon reconnection. DiscoTech provides a plug-in architecture to handle a wide variety of behaviours that developers may need during disconnection; these plug-ins range from fully generic tools to customized strategies with full knowledge of the groupware application. We present the design of the DiscoTech toolkit, show examples of its use, and provide evidence that it covers a broad range of situations, imposes minimal performance overhead, and is easy for programmers to learn. DiscoTech handles a wider range of issues than previous toolkits, without requiring undue effort, and provides a practical way to improve the real-world usability of synchronous groupware.
Magnetic transport apparatus for the production of ultracold atomic gases in the vicinity of a dielectric surface
Creators: name: Haendel, S.
name: Marchant, A. L.
name: Wiles, T. P.
name: Hopkins, S. A.
name: Cornish, S. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an apparatus designed for studies of atom-surface interactions using quantum degenerate gases of $^{85}$Rb and $^{87}$Rb in the vicinity of a room temperature dielectric surface. The surface to be investigated is a super-polished face of a glass Dove prism mounted in a glass cell under ultra-high vacuum (UHV). To maintain excellent optical access to the region surrounding the surface magnetic transport is used to deliver ultracold atoms from a separate vacuum chamber housing the magneto-optical trap (MOT). We present a detailed description of the vacuum apparatus highlighting the novel design features; a low profile MOT chamber and the inclusion of an obstacle in the transport path. We report the characterization and optimization of the magnetic transport around the obstacle, achieving transport efficiencies of 70% with negligible heating. Finally we demonstrate the loading of a hybrid optical-magnetic trap with $^{87}$Rb and the creation of Bose-Einstein condensates via forced evaporative cooling close to the dielectric surface.
description: 11 pages, 11 figures