cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamics of the Chiral Magnetic Effect in a weak magnetic field
Creators: name: Warringa, Harmen J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the real-time dynamics of the chiral magnetic effect in quantum electrodynamics (QED) and quantum chromodynamics (QCD). We consider a field configuration of parallel (chromo)electric and (chromo)magnetic fields with a weak perpendicular electromagnetic magnetic field. The chiral magnetic effect induces an electromagnetic current along this perpendicular magnetic field, which we will compute using linear response theory. We discuss specific results for a homogeneous sudden switch-on and a pulsed (chromo)electric field in a static and homogeneous (chromo)magnetic field. Our methodology can be easily extended to more general situations. The results are useful for investigating the chiral magnetic effect with heavy ion collisions and with lasers that create strong electromagnetic fields. As a side result we obtain the rate of chirality production for massive fermions in parallel electric and magnetic fields that are static and homogeneous.
description: 13 pages, 7 figures, revtex
Chordless Cycle Packing Is Fixed-Parameter Tractable
Creators: name: Marx, Dániel
Publisher: name: CISPA
Year: 2023

description: A chordless cycle or hole in a graph G is an induced cycle of length at least 4. In the Hole Packing problem, a graph G and an integer k is given, and the task is to find (if exists) a set of k pairwise vertex-disjoint chordless cycles. Our main result is showing that Hole Packing is fixed-parameter tractable (FPT), that is, can be solved in time f(k)n^O(1) for some function f depending only on k.
Accelerated Multiplicative Updates and Hierarchical ALS Algorithms for Nonnegative Matrix Factorization
Creators: name: Gillis, Nicolas
name: Glineur, François
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Nonnegative matrix factorization (NMF) is a data analysis technique used in a great variety of applications such as text mining, image processing, hyperspectral data analysis, computational biology, and clustering. In this paper, we consider two well-known algorithms designed to solve NMF problems, namely the multiplicative updates of Lee and Seung and the hierarchical alternating least squares of Cichocki et al. We propose a simple way to significantly accelerate these schemes, based on a careful analysis of the computational cost needed at each iteration, while preserving their convergence properties. This acceleration technique can also be applied to other algorithms, which we illustrate on the projected gradient method of Lin. The efficiency of the accelerated algorithms is empirically demonstrated on image and text datasets, and compares favorably with a state-of-the-art alternating nonnegative least squares algorithm.
description: 17 pages, 10 figures. New Section 4 about the convergence of the accelerated algorithms; Removed Section 5 about efficiency of HALS. Accepted in Neural Computation
Incompressibility of H-Free Edge Modification Problems: Towards a Dichotomy
Creators: name: Marx, Dániel
name: Sandeep, R. B.
Publisher: name: CISPA
Year: 2023

description: Given a graph G and an integer k, the H-free Edge Editing problem is to find whether there exist at most k pairs of vertices in G such that changing the adjacency of the pairs in G results in a graph without any induced copy of H. The existence of polynomial kernels for H-free Edge Editing (that is, whether it is possible to reduce the size of the instance to k^O(1) in polynomial time) received significant attention in the parameterized complexity literature. Nontrivial polynomial kernels are known to exist for some graphs H with at most 4 vertices (e.g., path on 3 or 4 vertices, diamond, paw), but starting from 5 vertices, polynomial kernels are known only if H is either complete or empty. This suggests the conjecture that there is no other H with at least 5 vertices were H-free Edge Editing admits a polynomial kernel. Towards this goal, we obtain a set ℋ of nine 5-vertex graphs such that if for every H ∈ ℋ, H-free Edge Editing is incompressible and the complexity assumption NP ⊈ coNP/poly holds, then H-free Edge Editing is incompressible for every graph H with at least five vertices that is neither complete nor empty. That is, proving incompressibility for these nine graphs would give a complete classification of the kernelization complexity of H-free Edge Editing for every H with at least 5 vertices. We obtain similar result also for H-free Edge Deletion. Here the picture is more complicated due to the existence of another infinite family of graphs H where the problem is trivial (graphs with exactly one edge). We obtain a larger set ℋ of nineteen graphs whose incompressibility would give a complete classification of the kernelization complexity of H-free Edge Deletion for every graph H with at least 5 vertices. Analogous results follow also for the H-free Edge Completion problem by simple complementation.
Biologically motivated controllers for robotic eyes
Creators: name: Lesmana, Martin
Publisher: name: University of British Columbia
Year: 2011

description: We present the development of computational models of biological motor control used in two different types of eye movements --- gaze shifting and gaze stabilization. They are then implemented and tested on robotic systems. The thesis also investigates the application of these biological motor control strategies in robotics applications. We describe and test a non-linear control algorithm inspired by the behaviour of motor neurons in humans during extremely fast saccadic eye movements involved in gaze shifting. The algorithm is implemented on a robotic eye connected with a stiff camera cable, similar to the optic nerve. This adds a complicated non-linear stiffness to the plant. For high speed movement, our "pulse-step" controller operates in open-loop using an internal model of the eye plant learned from past measurements. We show that the controller approaches the performance seen in the human eye, producing fast movements with little overshoot. Interestingly, the controller reproduces the main sequence relationship observed in animal eye movements. We also model the control of eye movements that serve to stabilize its gaze direction. To test and evaluate this stabilization algorithm, we use a camera mounted on a robotic test platform that can have unknown perturbations in the horizontal plane. We show that using models of the vestibulo-ocular and optokinetic reflexes to control the camera allows the camera to be effectively stabilized using an inertial sensor and a single additional motor, without the need for a joint position sensor. The algorithm uses an adaptive controller based on a model of the vertebrate Cerebellum for velocity stabilization, with additional drift correction. A resolution-adaptive retinal slip algorithm that is robust to motion blur was also developed. We show that the resulting system can reduce camera image motion to about one pixel per frame on average even when the platform is rotated at 200 degrees per second. As a practical robotic application, we also demonstrate how the common task of face detection benefits from active gaze stabilization.
Increasing World Grain Market Fluctuations: Implications for U.S. Agriculture
Creators: name: Miller, Thomas A.
name: Sharples, Jerry A.
name: House, Robert M.
name: Moore, Charles V.
name: Miller, Thomas A.
name: Sharples, Jerry A.
name: House, Robert M.
name: Moore, Charles V.
Publisher: name: Unknown
Year: 1985
Subjects: subject: Agricultural and Food Policy
subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Risk and Uncertainty
subject: market fluctuations
subject: price variability
subject: grain export variability
subject: uncertainty
subject: risk aversion
subject: structure and organization
subject: policy

description: Domestic and foreign import and export policies which restrict trade, along with increasing variability in exchange rates, are causing increased fluctuations in U.S. grain exports and are making U.S. farmers increasingly uncertain about the prices they can expect and about what they should produce. Farmer uncertainty reduces production, raises prices for consumers, and may accelerate structural changes in the farm sector. These problems may worsen over the next 20 years if other countries further insulate their domestic markets from variations in the world market. As export markets grow in coming decades, U.S. grain policies can be tailored to mitigate such impacts; but the alternatives may also involve undesirable side effects.
99%-fidelity ballistic quantum-state transfer through long uniform channels
Creators: name: Apollaro, T. J. G.
name: Banchi, L.
name: Cuccoli, A.
name: Vaia, R.
name: Verrucchi, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum-state transfer with fidelity higher than 0.99 can be achieved in the ballistic regime of an arbitrarily long one-dimensional chain with uniform nearest-neighbor interaction, except for the two pairs of mirror symmetric extremal bonds, say x (first and last) and y (second and last-but-one). These have to be roughly tuned to suitable values x ~ 2 N^{-1/3} and y ~ 2^{3/4} N^{-1/6}, N being the chain length. The general framework can describe the end-to-end response in different models, such as fermion or boson hopping models and XX spin chains.
description: 12 pages, 11 figures, 1 table
Genetic liability between COVID-19 and pre-eclampsia/eclampsia: a Mendelian randomization study
Creators: name: Xing, Yuhang
name: Wang, Zhen
name: Qi, Xiaohua
name: Xu, Qunli
name: Pu, Rui
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: The aim of this study was to investigate the possible causal relationship between COVID-19 and the risk of pre-eclampsia/eclampsia using a Mendelian randomized (MR) design. We estimated their genetic correlations and then performed two-sample Mendelian randomization analyses using pooled statistics from the COVID-19 susceptibility/hospitalization genome-wide association study and the pre-eclampsia/eclampsia datasets. The main analyses were performed using the inverse variance weighting method, supplemented by the weighted median method and the MR-Egger method. We identified a significant and positive genetic correlation between COVID-19 susceptibility and pre-eclampsia/eclampsia [OR = 1.23 (1.01–1.51), p = 0.043]. Meanwhile, hospitalization of COVID-19 was significantly associated with a higher risk of pre-eclampsia/eclampsia [OR = 1.15 (1.02–1.30), p = 0.024]. Consistently, hospitalization of COVID-19 were nominally associated with higher risk of pre-eclampsia [OR = 1.14, (1.01–1.30), p = 0.040]. The results were robust under all sensitivity analyses. These results suggest that COVID-19 may increase the risk of pre-eclampsia/eclampsia. Future development of preventive or therapeutic interventions should emphasize this to mitigate the complications of COVID-19.
Mindfulness-based stress reduction, blood pressure, and acute stress responses in women with cancer
Creators: name: Van Wielingen, Laura
Publisher: name: University of Calgary
Year: 2006

description: Bibliography: p. 26-36
description: A longitudinal waitlist-controlled trial was conducted to investigate the impact of a Mindfulness-Based Stress Reduction (MBSR) program on blood pressure (BP), acute stress responses, and psychological functioning in women with cancer. Twenty nine women with a diagnosis of cancer (mostly breast) were either registered for immediate MBSR participation (n=18), or were waiting for the next program (n=l 1). Resting BP was assessed Jeekly at home over the 8-week study period. Physiological responses to stress were assessed before and after MBSR program participation, or the 8-week waiting period. Analyses revealed that for participants with relatively high levels of baseline systolic BP, participation in the MBSR program was associated with a significant decrease in resting systolic BP over the 8-weeks relative to the control group. Analyses of acute stress responses revealed no significant differences between treatment and control groups from pre- to post-intervention. MBSR participation was associated with improvements in psychological functioning.
Modular Black-box Runtime Verification of Security Protocols
Creators: name: Morio, Kevin
name: Jackson, Dennis
name: Vassena, Marco
name: Künnemann, Robert
Publisher: name: CISPA
Year: 2023

description: Verification techniques have been applied to the design of secure protocols for decades. However, relatively few efforts have been made to ensure that verified designs are also implemented securely. Static code verification techniques offer one way to bridge the verification gap between design and implementation, but require substantial expertise and manual labor to realize in practice. In this short paper, we propose black-box runtime verification as an alternative approach to extend the security guarantees of protocol designs to their implementations. Instead of instrumenting the complete protocol implementation, our approach only requires instrumenting common cryptographic libraries and network interfaces with a runtime monitor that is automatically synthesized from the protocol specification. This lightweight technique allows the effort for instrumentation to be shared among different protocols and ensures security with presumably minimal performance overhead.
Broadening in Medium-induced QCD Radiation off a $q {\bar q}$ Antenna
Creators: name: Armesto, Néstor
name: Ma, Hao
name: Mehtar-Tani, Yacine
name: Salgado, Carlos A.
name: Tywoniuk, Konrad
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this contribution, the one-gluon radiation spectrum off a massive quark-antiquark ($q {\bar q}$) antenna traversing a QCD medium is calculated in the eikonal approximation. The interference between emissions from the quark and the antiquark is considered. The gluon spectrum computed at first order in the opacity expansion is collinear finite but infrared divergent, which is in contrast with the result obtained from an independent emitter which is both infrared and collinear finite. Phenomenological consequences on the broadening of the emitted gluon are investigated. In the soft gluon emission limit, the interference between emitters causes a different broadening style from the typical {\bf k}-broadening in the case of an independent emitter.
description: 3 pages, 1 figure, Proceedings of PANIC 2011, MIT, Cambridge, USA
The X-ray properties of high-z FRI candidates in the COSMOS field
Creators: name: Tundo, Elena
name: Tozzi, Paolo
name: Chiaberge, Marco
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the X-ray analysis of a sample of candidate high-redshift (1
description: 11 pages, 5 figures, MNRAS accepted; added co-author affiliation
Direct Measurements of Magnetic Twist in the Solar Corona
Creators: name: Malanushenko, A.
name: Yusuf, M. H.
name: Longcope, D. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In the present work we study evolution of magnetic helicity in the solar corona. We compare the rate of change of a quantity related to the magnetic helicity in the corona to the flux of magnetic helicity through the photosphere and find that the two rates are similar. This gives observational evidence that helicity flux across the photosphere is indeed what drives helicity changes in solar corona during emergence. For the purposes of estimating coronal helicity we neither assume a strictly linear force-free field, nor attempt to construct a non-linear force-free field. For each coronal loop evident in Extreme Ultraviolet (EUV) we find a best-matching line of a linear force-free field and allow the twist parameter alpha to be different for each line. This method was introduced and its applicability was discussed in Malanushenko et. al. (2009). The object of the study is emerging and rapidly rotating AR 9004 over about 80 hours. As a proxy for coronal helicity we use the quantity averaged over many reconstructed lines of magnetic field. We argue that it is approximately proportional to "flux-normalized" helicity H/Phi^2, where H is helicity and Phi is total enclosed magnetic flux of the active region. The time rate of change of such quantity in the corona is found to be about 0.021 rad/hr, which is compatible with the estimates for the same region obtained using other methods Longcope et. al. (2007), who estimated the flux of normalized helicity of about 0.016 rad/hr.
Implications of World Sugar Markets, Policies, and Production Costs for U.S. Sugar
Creators: name: Hoff, Frederic L.
name: Lawrence, Max
name: Hoff, Frederic L.
name: Lawrence, Max
Publisher: name: Unknown
Year: 1985
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: International Relations/Trade
subject: Production Economics
subject: Sugar
subject: price supports
subject: production costs
subject: policies
subject: sugarcane
subject: sugarbeets
subject: corn sweeteners

description: Most of the major sugar producing and exporting countries, including the United States, have adopted national policies to protect domestic producers from the periodic price depressions. U.S. sugar production costs are above both current world sugar prices and the prices at which the major cane sugar exporters can operate profitably. Consequently, the U.S. sugar industry cannot now compete in an open domestic sweetener market without upheaval in its production and processing sectors, unless it receives Government assistance on a continuing basis.
XMM-Newton observation of the persistent Be/NS X-ray binary pulsar RX J0440.9+4431
Creators: name: La Palombara, N.
name: Sidoli, L.
name: Esposito, P.
name: Tiengo, A.
name: Mereghetti, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many X-ray accreting pulsars have a soft excess below 10 keV. This feature has been detected also in faint sources and at low luminosity levels, suggesting that it is an ubiquitous phenomenon. In the case of the high luminosity pulsars (Lx > 10^36 erg/s), the fit of this component with thermal emission models usually provides low temperatures (kT < 0.5 keV) and large emission regions (R > a few hundred km); for this reason, it is referred to as a `soft' excess. On the other hand, we recently found that in persistent, low-luminosity (Lx ~ 10^34 erg/s) and long-period (P > 100 s) Be accreting pulsars the observed excess can be modeled with a rather hot (kT > 1 keV) blackbody component of small area (R < 0.5 km), which can be interpreted as emission from the NS polar caps. In this paper we present the results of a recent XMM-Newton observation of the Galactic Be pulsar RX J0440.9+4431, which is a poorly studied member of this class of sources. We have found a best-fit period P = 204.96(+/-0.02) s, which implies an average pulsar spin-down during the last 13 years, with dP/dt ~ 6x10^(-9) s/s. The estimated source luminosity is Lx ~ 8x10^(34) erg/s: this value is higher by a factor < 10 compared to those obtained in the first source observations, but almost two orders of magnitude lower than those measured during a few outbursts detected in the latest years. The source spectrum can be described with a power law plus blackbody model, with kTbb = 1.34(+/-0.04) keV and Rbb = 273(+/-16) m, suggesting a polar-cap origin of this component. Our results support the classification of RX J0440.9+4431 as a persistent Be/NS pulsar, and confirm that the hot blackbody spectral component is a common property of this class of sources.
description: 8 pages, 6 figures, 2 tables. Accepted for publication by Astronomy and Astrophysics
Probabilistic Hyperproperties of Markov Decision Processes
Creators: name: Dimitrova, Rayna
name: Finkbeiner, Bernd
name: Torfah, Hazem
Publisher: name: CISPA
Year: 2023

description: Hyperproperties are properties that describe the correctness of a system as a relation between multiple executions. Hyperproperties generalize trace properties and include information-flow security requirements, like noninterference, as well as requirements like symmetry, partial observation, robustness, and fault tolerance. We initiate the study of the specification and verification of hyperproperties of Markov decision processes (MDPs). We introduce the temporal logic PHL (Probabilistic Hyper Logic), which extends classic probabilistic logics with quantification over schedulers and traces. PHL can express a wide range of hyperproperties for probabilistic systems, including both classical applications, such as probabilistic noninterference, and novel applications in areas such as robotics and planning. While the model checking problem for PHL is in general undecidable, we provide methods both for proving and for refuting formulas from a fragment of the logic. The fragment includes many probabilistic hyperproperties of interest.
Caracterización de las diferencias de sexo en la enfermedad de Alzheimer, mediante estrategias basadas en el análisis masivo de datos de célula única (Anexos)
Creators: name: Alejo, Almudena Neva
Publisher: name: Zenodo
Year: 2021
Subjects: Enfermedad de Alzheimer
transcriptómica de célula única
transcriptómica de núcleo único
perspectiva de sexo
microglía
astrocitos

description: Anexos del Trabajo de Fin de Máster. Titulación: Máster Universitario en Bioinformática (Universitat de València). Tutores: María Pascual Mora, Francisco García García, María de la Iglesia Vayá. Grupo de investigación: Unidad de Bioinformática y Bioestadística (CIPF). Anexo I: tablas suplementarias. Anexo II: scripts desarrollados para el análisis bioinformático individual de los estudios de snRNA-seq. Concretamente para el estudio GSE157827. Los mismos scripts con ligeros cambios fueron utilizados para el análisis del resto de estudios. (Lenguaje de programación: R). Anexo III: figuras suplementarias. Anexo IV: Listas de genes obtenidas en el análisis de intersección de los genes significativos de los estudios individuales. Los resultados se integraron por tipo celular (microglía y astrocitos), contraste (Mujer EA – Mujer Control; Hombre EA – Hombre Control; (Mujer EA – Mujer Control) - (Hombre EA – Hombre Control)) y signo del logFC, generando 12 listas de genes comunes.
Dependence on pseudorapidity and centrality of charged hadron production in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A measurement is presented of the charged hadron multiplicity in hadronic PbPb collisions, as a function of pseudorapidity and centrality, at a collision energy of 2.76 TeV per nucleon pair. The data sample is collected using the CMS detector and a minimum-bias trigger, with the CMS solenoid off. The number of charged hadrons is measured both by counting the number of reconstructed particle hits and by forming hit doublets of pairs of layers in the pixel detector. The two methods give consistent results. The charged hadron multiplicity density dN(ch)/d eta, evaluated at eta=0 for head-on collisions, is found to be 1612 +/- 55, where the uncertainty is dominated by systematic effects. Comparisons of these results to previous measurements and to various models are also presented.
Magnetic and quantum entanglement properties of the distorted diamond chain model for azurite
Creators: name: Ananikian, Nerses
name: Lazaryan, Hrachya
name: Nalbandyan, Mikayel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present the results of magnetic properties and entanglement of the distorted diamond chain model for azurite using pure quantum exchange interactions. The magnetic properties and concurrence as a measure of pairwise thermal entanglement have been studied by means of variational mean-field like treatment based on Gibbs-Bogoliubov inequality. Such a system can be considered as an approximation of the natural material azurite, Cu3(CO3)2(OH)2. For values of exchange parameters, which are taken from experimental results, we study the thermodynamic properties, such as azurite specific heat and magnetic susceptibility. We also have studied the thermal entanglement properties and magnetization plateau of the distorted diamond chain model for azurite.
Improving Recommendation Quality by Merging Collaborative Filtering and Social Relationships
Creators: name: De Meo, Pasquale
name: Ferrara, Emilio
name: Fiumara, Giacomo
name: Provetti, Alessandro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Social and Information Networks (cs.SI)
subject: Information Retrieval (cs.IR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Matrix Factorization techniques have been successfully applied to raise the quality of suggestions generated by Collaborative Filtering Systems (CFSs). Traditional CFSs based on Matrix Factorization operate on the ratings provided by users and have been recently extended to incorporate demographic aspects such as age and gender. In this paper we propose to merge CFS based on Matrix Factorization and information regarding social friendships in order to provide users with more accurate suggestions and rankings on items of their interest. The proposed approach has been evaluated on a real-life online social network; the experimental results show an improvement against existing CFSs. A detailed comparison with related literature is also present.
description: 6 pages, Proceedings of the 11th International Conference on Intelligent Systems Design and Applications
Usability and the effects of interruption in C-TOC : self-administered cognitive testing on a computer
Creators: name: Brehmer, Matthew Michael
Publisher: name: University of British Columbia
Year: 2011

description: Cognitive Testing on a Computer (C-TOC) is a self-administered web-based computerised cognitive assessment battery. C-TOC's intended scenario of use involves an older adult, who has presented a concern regarding his or her cognitive health, completing the test independently at home, as directed by their family physician or a specialty clinic. This thesis presents the results of two studies aimed to address the viability of older adults completing the C-TOC test battery in a home setting, first to identify usability issues, and second to understand the effects of interruptions on C-TOC performance. In Study 1, an initial standard evaluation of C-TOC's usability was conducted with representative users and a cross-cultural advisory panel of health professionals. Based on our own observations of participants' interactions with C-TOC, together with subjective reporting measures (interviews, questionnaires, & focus group discussion), several user interface design issues were identified. Given these issues, this thesis presents a list of recommendations for improving C-TOC's usability in subsequent versions. The bulk of the novel contributions presented in this thesis arise from Study 2. In this study, we report the findings of a laboratory experiment to investigate the effects of increasingly demanding interrupting tasks on older adults' C-TOC testing performance. Related work has reported interruptions having a range of inhibitory and facilitatory effects on primary task performance. Cognitive ageing literature has suggested that increased interruption workload demand should have greater detrimental effects on older adults' performance, when compared to younger adults. With 36 participants from 3 age groups (19-54, 55-69, and 70+), we found divergent effects of increased interruption demand on two primary tasks. Results suggest that older and younger adults experience interruptions differently, that increased interruption demand can incur a task resumption cost. However, at no age is test performance, in terms of accuracy, compromised by demanding interruptions. This finding is reassuring with respect to the success of C-TOC, and is promising for other applications used by older adults. It is our hope that what was learned from both studies will contribute to the development of a usable and valid cognitive assessment test.
Up2Dep: Android Tool Support to Fix Insecure Code Dependencies
Creators: name: Nguyen, Duc Cuong
name: Derr, Erik
name: Backes, Michael
name: Bugiel, Sven
Publisher: name: CISPA
Year: 2023

description: Third-party libraries, especially outdated versions, can introduce and multiply security & privacy related issues to Android applications. While prior work has shown the need for tool support for developers to avoid libraries with security problems, no such a solution has yet been brought forward to Android. It is unclear how such a solution would work and which challenges need to be solved in realizing it. In this work, we want to make a step forward in this direction. We propose Up2Dep, an Android Studio extension that supports Android developers in keeping project dependencies up-to-date and in avoiding insecure libraries. To evaluate the technical feasibility of Up2Dep, we publicly released Up2Dep and tested it with Android developers (N=56) in their daily tasks. Up2Dep has delivered quick-fixes that mitigate 108 outdated dependencies and 8 outdated dependencies with security problems in 34 real projects. It was perceived by those developers as being helpful. Our results also highlight technical challenges in realizing such support, for which we provide solutions and new insights. Our results emphasize the urgent need for designated tool support to detect and update insecure outdated third-party libraries in Android apps. We believe that Up2Dep has provided a valuable step forward to improving the security of the Android ecosystem and encouraging results for tool support with a tangible impact as app developers have an easy means to fix their outdated and insecure dependencies.
Dicke-like quantum phase transition and vacuum entanglement with two coupled atomic ensembles
Creators: name: Zheng, Shi-Biao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the coherent cooperative phenomena of the system composed of two interacting atomic ensembles in the thermodynamic limit. Remarkably, the system exhibits the Dicke-like quantum phase transition and entanglement behavior although the governing Hamiltonian is fundamentally different from the spin-boson Dicke Hamiltonian, offering the opportunity for investigating collective matter-light dynamics with pure matter waves. The model can be realized with two Bose-Einstein condensates or atomic ensembles trapped in two optical cavities coupled to each other. The interaction between the two separate samples is induced by virtual photon exchange.
Novel Is Not Always Better:On the Relation between Novelty and Dominance Pruning
Creators: name: Groß, Joschka
name: Torralba, Àlvaro
name: Fickert, Maximilian
Publisher: name: CISPA
Year: 2023

description: Novelty pruning is a planning technique that focuses on exploring states that are novel, i.e., those containing facts that have not been seen before. This seemingly simple idea has had a huge impact on the state of the art in planning though its effectiveness is not entirely understood yet. We relate novelty to dominance pruning, which compares states to previously seen states to eliminate those that are provably worse in terms of goal distance. Novelty can be interpreted as an unsafe approximation of dominance, where states containing novel facts are relevant because they enable new paths to the goal and, therefore, they are less likely to be dominated by others. This provides a framework to understand the success of novelty, resulting in new variants that combine both techniques.
Survey on Security Issues in Cloud Computing and Associated Mitigation Techniques
Creators: name: Bhadauria, Rohit
name: Sanyal, Sugata
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Cloud Computing holds the potential to eliminate the requirements for setting up of high-cost computing infrastructure for IT-based solutions and services that the industry uses. It promises to provide a flexible IT architecture, accessible through internet for lightweight portable devices. This would allow multi-fold increase in the capacity or capabilities of the existing and new software. In a cloud computing environment, the entire data reside over a set of networked resources, enabling the data to be accessed through virtual machines. Since these data-centers may lie in any corner of the world beyond the reach and control of users, there are multifarious security and privacy challenges that need to be understood and taken care of. Also, one can never deny the possibility of a server breakdown that has been witnessed, rather quite often in the recent times. There are various issues that need to be dealt with respect to security and privacy in a cloud computing scenario. This extensive survey paper aims to elaborate and analyze the numerous unresolved issues threatening the cloud computing adoption and diffusion affecting the various stake-holders linked to it.
description: 20 pages, 2 Figures, 1 Table. arXiv admin note: substantial text overlap with arXiv:1109.5388
Differing Effects of Farm Commodity Programs on Land Returns and Land Values
Creators: name: Gertel, Karl
name: Gertel, Karl
Publisher: name: Unknown
Year: 1985
Subjects: Agricultural and Food Policy
Agricultural Finance
Land Economics/Use
Research Methods/ Statistical Methods

description: Excerpt from the Report: This study examines the likely effects of discontinuing farm programs in 1986. Such a change is unlikely. While this study deals with a hypothetical change rather than an actual policy proposal, it illustrates the relative effect of farm commodity programs on returns and value of land producing major commodities.
High-dimensional Gaussian fields with isotropic increments seen through spin glasses
Creators: name: Klimovsky, Anton
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary: 60K35, Secondary: 82B44, 82D30, 60G15, 60G60, 60F10

description: We study the free energy of a particle in (arbitrary) high-dimensional Gaussian random potentials with isotropic increments. We prove a computable saddle-point variational representation in terms of a Parisi-type functional for the free energy in the infinite-dimensional limit. The proofs are based on the techniques developed in the course of the rigorous analysis of the Sherrington-Kirkpatrick model with vector spins.
description: 13 pages
Cross-Origin State Inference (COSI) Attacks: Leaking Web Site States through XS-Leaks
Creators: name: Sudhodanan, Avinash
name: Khodayari, Soheil
name: Caballero, Juan
Publisher: name: CISPA
Year: 2023

description: In a Cross-Origin State Inference (COSI) attack, an attacker convinces a victim into visiting an attack web page, which leverages the cross-origin interaction features of the victim's web browser to infer the victim's state at a target web site. Multiple instances of COSI attacks have been found in the past under different names such as login detection or access detection attacks. But, those attacks only consider two states (e.g., logged in or not) and focus on a specific browser leak method (or XS-Leak). This work shows that mounting more complex COSI attacks such as deanonymizing the owner of an account, determining if the victim owns sensitive content, and determining the victim's account type often requires considering more than two states. Furthermore, robust attacks require supporting a variety of browsers since the victim's browser cannot be predicted apriori. To address these issues, we present a novel approach to identify and build complex COSI attacks that differentiate more than two states and support multiple browsers by combining multiple attack vectors, possibly using different XS-Leaks. To enable our approach, we introduce the concept of a COSI attack class. We propose two novel techniques to generalize existing COSI attack instances into COSI attack classes and to discover new COSI attack classes. We systematically apply our techniques to existing attacks, identifying 40 COSI attack classes. As part of this process, we discover a novel XS-Leak based on window.postMessage. We implement our approach into Basta-COSI, a tool to find COSI attacks in a target web site. We apply Basta-COSI to test four stand-alone web applications and 58 popular web sites, finding COSI attacks against each of them.
Spin-orbit interaction in a two-dimensional electron gas: a SU(2) formulation
Creators: name: Raimondi, R.
name: Schwab, P.
name: Gorini, C.
name: Vignale, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-orbit interaction is usefully classified as extrinsic or intrinsic depending on its origin: the potential due to random impurities (extrinsic), or the crystalline potential associated with the band or device structure (intrinsic). In this paper we will show how by using a SU(2) formulation the two sources of spin-orbit interaction may be described in an elegant and unified way. As a result we obtain a simple description of the interplay of the two types of spin-orbit interaction, and a physically transparent explanation of the vanishing of the d.c. spin Hall conductivity in a Rashba two-dimensional electron gas when spin relaxation is neglected, and its reinstatement when spin relaxation is allowed. Furthermore, we obtain an explicit formula for the transverse spin polarization created by an electric current, which generalizes the standard formula obtained by Edelstein and Aronov and Lyanda-Geller by including extrinsic spin-orbit interaction and spin relaxation.
description: 9 pages
Energy and U.S. Agriculture: Irrigation Pumping, 1974-83
Creators: name: Sloggett, Gordon
name: Sloggett, Gordon
Publisher: name: Unknown
Year: 1985
Subjects: subject: Crop Production/Industries
subject: Resource /Energy Economics and Policy
subject: Irrigation
subject: energy
subject: water use

description: U.S. land irrigated with onfarm pumped water increased by 9.5 million acres to 44.5 million acres from 1974 to 1983. Higher energy prices increased energy pumping costs from $551 million to $2.5 billion. Pump irrigators applied energy-saving technologies such as low-pressure center pivots, which alone saved about $72 million in 1983. Favorable economic conditions could lead to 3 to 4 million additional pump-irrigated acres in the water-short Great Plains by the year 2020 and significant increases in the more humid Eastern States. This report, the fourth in a series, updates the 1980 irrigation estimates and focuses on 1983 pump-irrigated farmland, prospects for irrigation, and fuel costs.
One-component plasma on a spherical annulus and a random matrix ensemble
Creators: name: Fischmann, Jonit
name: Forrester, Peter J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The two-dimensional one-component plasma at the special coupling β= 2 is known to be exactly solvable, for its free energy and all of its correlations, on a variety of surfaces and with various boundary conditions. Here we study this system confined to a spherical annulus with soft wall boundary conditions, paying special attention to the resulting asymptotic forms from the viewpoint of expected general properties of the two-dimensional plasma. Our study is motivated by the realization of the Boltzmann factor for the plasma system with β= 2, after stereographic projection from the sphere to the complex plane, by a certain random matrix ensemble constructed out of complex Gaussian and Haar distributed unitary matrices.
description: v2, typos and references corrected, 24 pages, 1 figure
Biofield Energy Healing Treatment Based Herbomineral Formulation on Pro-Inflammatory Cytokines Expression in Murine Dendritic and Splenocyte cells
Creators: name: Schmitz, Ronald David
Publisher: name: SMN - The ScienceMedia Network
Year: 2019
Subjects: Natural Sciences

description: The utilization and demand of self-medication with herbomineral-based formulations have increased day-by-day across the globe over the last decade. A new proprietary herbomineral formulation was prepared with the mixture of minerals (zinc, magnesium, and selenium) and the herbal root extract of ashwagandha. The current study was undertaken to evaluate the Biofield Energy Healing (The Trivedi Effect®) on the test herbomineral formulation using murine dendritic cells (DCs) and splenocytes in vitro. The formulation was divided into two parts, one part was control without any Biofield Energy Treatment, while the other part was defined as the Biofield Energy Treated sample, which received the Biofield Energy Healing Treatment remotely from eighteen renowned Biofield Energy Healers. The effect of the Biofield Energy Treated formulation in murine cells was monitored with an estimation of pro-inflammatory cytokines levels such as tumor necrosis factor (TNF-α), macrophage inflammatory protein-1α (MIP-1α) and interleukin (IL-1β) in cell culture supernatants along with estimations of non-cytotoxic concentrations of the test formulation by MTT assay. The Biofield Treated formulation showed 114.2%, 122.6%, 141.2%, 127.8%, and 114.1% cell viability at concentrations 1.05, 5.2, 10.5, 25.6, and 51.2 µg/mL, respectively in DCs. Similarly, the Biofield Energy Treated and untreated formulations showed more than 100% cell viability in mice splenocytes at 5 µg/mL. The level of TNF-α in DCs was significantly (p≤0.05) inhibited by 19.21% in the Biofield Treated formulation at concentration 5.2 µg/mL as compared to the untreated test formulation. The level of MIP-1α in LPS induced mice splenocyte cells was reduced by 15.35% in the Biofield Energy Treated formulation at 0.0105 µg/mL as compared to the untreated formulation. Similarly, the level of IL-1β in LPS induced mice splenocyte cells was significantly (p≤0.05) reduced by 31.59% in the Biofield Treated formulation at 1.05 µg/mL as compared to the untreated formulation. Altogether, the results suggest that The Trivedi Effect® (Biofield Energy Healing Treatment) showed significant down-regulation of the tested pro-inflammatory cytokines expression and potentiated the immunosuppressive effect of the treated formulation to modulate the immune system. These data also suggest that the Biofield Treated test formulation can be used for autoimmune and inflammatory diseases, stress management and anti-aging by improving overall health.
The Wendelstein Calar Alto Pixellensing Project (WeCAPP): the M31 Nova catalogue
Creators: name: Lee, C. -H.
name: Riffeser, A.
name: Seitz, S.
name: Bender, R.
name: Fliri, J.
name: Hopp, U.
name: Ries, C.
name: Baernbantner, O.
name: Goessl, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present light curves from the novae detected in the long-term, M31 monitoring WeCAPP project. The goal of WeCAPP is to constrain the compact dark matter fraction of the M31 halo with microlensing observations. As a by product we have detected 91 novae benefiting from the high cadence and highly sensitive difference imaging technique required for pixellensing. We thus can now present the largest CCD and optical filters based nova light curve sample up-to-date towards M31. We also obtained thorough coverage of the light curve before and after the eruption thanks to the long-term monitoring. We apply the nova taxonomy proposed by Strope et al. (2010) to our nova candidates and found 29 S-class novae, 10 C-class novae, 2 O-class novae and 1 J-class nova. We have investigated the universal decline law advocated by Hachichu and Kato (2006) on the S-class novae. In addition, we correlated our catalogue with the literature and found 4 potential recurrent novae. Part of our catalogue has been used to search for optical counter-parts of the super soft X-ray sources detected in M31 (Pietsch et al. 2005). Optical surveys like WeCAPP, and coordinated with multi-wavelength observation, will continue to shed light on the underlying physical mechanism of novae in the future.
description: 15 pages, 15 figures, 7 tables, A&A accepted for publication. The appendix is stored in the Data Conservancy
Rising motion controllers for physically simulated characters
Creators: name: Jones, Benjamin James
Publisher: name: University of British Columbia
Year: 2011

description: The control of physics-based simulated characters is an important open problem with potential applications in film, games, robotics, and biomechanics. While many methods have been developed for locomotion and quiescent stance, the problem of returning to a standing posture from a sitting or fallen posture has received much less attention. In this thesis, we develop controllers for biped sit-to-stand, quadruped getting-up, and biped prone-to-stand motions. These controllers are created from a shared set of simple components including pose tracking, root orientation correction, and virtual force based control. We also develop an optimization strategy that generates fast, dynamic rising motions from an initial statically stable motion. This strategy is also used to generalize controllers to sloped terrain and characters of varying size.