cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Partwise model predictive control for interactive contact-guided motion synthesis
Creators: name: Khoshsiyar, Niloofar
Publisher: name: University of British Columbia
Year: 2024

description: We propose a contact-centred approach for synthesizing physics-based character animation. Rather than using target keyframe poses to help guide a motion, our framework uses sparse keyframes based on a small number of pairwise contacts between the body and the environment or between two parts of the body. These serve as loose specifications of motion strategies, which can then be solved online at interactive rates, using a model predictive control (MPC) framework. This allows for motion generalization across environment variations as well as producing diverse output motions due to the stochastic nature of the MPC solver. We demonstrate the advantage of this method in contrast to deep reinforcement learning methods which can require hours or days to compute a new control policy after modifications to the reward functions or the environment properties. Moreover, our framework exploits partwise motion planning results when this proves beneficial, i.e. in less coordinated tasks, while defaulting to whole-body motion planning when that proves to be more effective, i.e. in motions that require full-body coordination. Our results present a range of challenging contact-rich motions and everyday tasks that can be synthesized using this framework, showcasing both motion diversity and generalization capabilities.
Additional file 4 of Transcriptome analysis reveals key genes involved in the resistance to Cryphonectria parasitica during early disease development in Chinese chestnut
Creators: name: Nie, Xinghua
name: Zhao, Shuqing
name: Hao, Yaqiong
name: Gu, Si
name: Zhang, Yu
name: Qi, Baoxiu
name: Xing, Yu
name: Qin, Ling
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 4: Fig. S3. Differentially expressed genes (DEGs) at different trend characteristics at Mock0h-T3 h-T9 h. a: The genes showing an upward trend were annotated in KEGG; b: The genes showing an downward trend were annotated in KEGG.
Perceived abuse in undergraduate medical students of Lahore, Pakistan: a cross-sectional study
Creators: name: Haq, Izhar Ul
name: Adeel, Muhammad
name: Abbas, Asad
name: Saddique, Naveen
name: Ahsan Waheed Qazi
name: Iqbal, Shahid
name: Waqas, Ahmed
name: Waqas Ahmad
Publisher: name: figshare
Year: 2021
Subjects: subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 220106 Medical Ethics

description: Background: Abuse is any unwanted act which causes distress to someone either physically or mentally. Studies have shown that medical students from all over the world experience abuse on daily basis but such studies are lacking in Pakistan.Methodology: A cross-sectional study design was employed to conduct this study. 385 students took part in the study from all the undergraduate years at CMH Lahore Medical College, Lahore Cantonment. Questionnaire containing questions about perceived abuse and demographics were given to the students after their verbal consent.Results: 358 students formed the final sample. Male and female students equally participated in the study. 2nd and 3rd year medical students largely contributed to the study. More than 90% of the students identified themselves to have been abused at least once during their medical school. 9.7% students stated that they have never experienced any form of abuse. 11% of students experienced sexual harassment with males leading females. Pre-clinical faculty were the largest source of mistreatment. Linear regression revealed male gender and being a student from 3rd, 4th and 5th year to be a positive predictor of medical student abuse.Conclusion: Medical student abuse is rampant in Pakistan. Abuse has serious impact on the view of medical students and make them cynical. It is something which requires active interventions of the institutions to weed out to make a comfortable environment for the doctors of tomorrow.
Additional file 6 of Transcriptome analysis reveals key genes involved in the resistance to Cryphonectria parasitica during early disease development in Chinese chestnut
Creators: name: Nie, Xinghua
name: Zhao, Shuqing
name: Hao, Yaqiong
name: Gu, Si
name: Zhang, Yu
name: Qi, Baoxiu
name: Xing, Yu
name: Qin, Ling
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 6: Fig. S4. The related genes expression thermogram of plant hormone signal transduction pathway.
QCD matrix elements and truncated showers
Creators: name: Hoeche, Stefan
name: Krauss, Frank
name: Schumann, Steffen
name: Siegert, Frank
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive an improved prescription for the merging of matrix elements with parton showers, extending the CKKW approach. A flavour-dependent phase space separation criterion is proposed. We show that this new method preserves the logarithmic accuracy of the shower, and that the original proposal can be derived from it. One of the main requirements for the method is a truncated shower algorithm. We outline the corresponding Monte Carlo procedures and apply the new prescription to QCD jet production in e+e- collisions and Drell-Yan lepton pair production. Explicit colour information from matrix elements obtained through colour sampling is incorporated in the merging and the influence of different prescriptions to assign colours in the large N_C limit is studied. We assess the systematic uncertainties of the new method.
description: 31 pages, 9 figures, 2 tables; revised version, accepted for publication in JHEP
Prospects for the Measurement of the Unitarity Triangle Angle gamma from B0 to DK+pi- Decays
Creators: name: Gershon, Tim
name: Williams, Mike
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The potential for a precise measurement of the Unitarity Triangle angle $γ$ in future experiments from the decay $B^0 \to DK^{*0}$ is well-known. It has recently been suggested that the sensitivity can be significantly enhanced by analysing the $B^0 \to DK^+π^-$ Dalitz plot to extract amplitudes relative to those of the flavour-specific decay $B^0 \to D_2^{*-}K^+$. An extension to this method which includes the case where the neutral $D$ meson is reconstructed in suppressed final states is presented. The sensitivity to $γ$ is estimated using this method and compared to that obtained using the $B^0 \to DK^{*0}$ decay alone. Experimental effects, such as background contamination, are also considered. This approach appears to be a highly attractive addition to the family of methods that can be used to determine $γ$.
description: 12 pages, 10 figures. v2 as published
Supplementary Information from Responsiveness to inhibitory signals changes as a function of colony size in honeybees (Apis mellifera)
Creators: name: Bell, Heather C.
name: Hsiung, Kevin
name: Pasberg, Patrick
name: Broccard, Frédéric D.
name: Nieh, James C.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60114 Systems Biology
subject: FOS: Biological sciences
subject: 60199 Biochemistry and Cell Biology not elsewhere classified
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: Supplementary methods for video analysis and stop signal analysis
... einschließlich inklusiver Pädagogik
Creators: name: Dworschak, Wolfgang
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: Sonderpädagogik, Inklusion, Pädagogik bei geistiger Behinderung, Lehrkräftebildung
subject: 370 Erziehung, Schul- und Bildungswesen

description: Die meisten der jüngst eingerichteten Professuren für Sonderpädagogik in Bayern tragen die Teildenomination ‚einschließlich inklusiver Pädagogik‘. Damit sind sie die ersten mit dieser Denomination in Bayern. Im folgenden Beitrag wird der Frage nachgegangen, welche Bedeutung die Teildenomination ‚einschließlich inklusiver Pädagogik‘ aus Sicht der, im hier vorliegenden Fall, Hauptdenomination ‚Pädagogik bei geistiger Behinderung‘ hat.
Additional file 1 of Combined use of CA125, neutrophil/lymphocyte ratio and platelet/lymphocyte ratio for the diagnosis of borderline and malignant epithelial ovarian tumors
Creators: name: Huang, Ke
name: Xu, Shengjie
name: Wang, Jiatong
name: Ge, Lili
name: Xu, Juan
name: Jia, Xuemei
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: Additional file 1: Supplementary data 1. No significant differences in laboratory parameters between serous and mucinous BEOT patients.
Modeling The Star Forming Universe at z=2: Impact of Cold Accretion Flows
Creators: name: Khochfar, S.
name: Silk, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of a semi-analytic model (SAM) that includes cold accretion and a porosity-based prescription for star formation. We can recover the puzzling observational results of low $V/σ$ seen in various massive disk or disk-like galaxies, if we allow 18 % of the accretion energy from cold flows to drive turbulence in gaseous disks at $z=2$. The increase of gas mass through cold flows is by itself not sufficient to increase the star formation rate sufficiently to recover the number density of $\dot{M}_*>120$ M$_{\odot}$ yr$^{-1}$ galaxies in our model. In addition, it is necessary to increase the star formation efficiency. This can be achieved naturally in the porosity model, where star formation efficiency scales $\propto σ$, which scales as cloud velocity dispersion. As cold accretion is the main driver for gas velocity dispersion in our model, star formation efficiency parallels cold accretion rates, and allows fast conversion into stars. At $z\sim 2$, we find a space density $~10^{-4}$ Mpc$^{-3}$ in star-forming galaxies with $\dot{M}_*>120$ M$_{\odot}$ yr$^{-1}$, in better agreement than earlier estimates form SAMs. However, the fundamental relation between $\dot{M}_*$ and $M_*$ is still offset from the observed relation, indicating the need for possibly more efficient star formation at high z perhaps associated with a role for AGN triggering.
description: Replaced by ApJL accepted version, includes various comments from the referee, high-resolution figures available from sadeghk@mpe.mpg.de
LABOUR DYNAMICS IN THE INFORMAL SECTOR: EVIDENCE FROM ZIMBABWE'S URBAN METAL INDUSTRY
Creators: name: Tendai, Joseph Moyo
name: Alice, Nomsa Ndlovu
Publisher: name: AMERICAN SERIAL
Year: 2024
Subjects: Informal sector
Economic structural adjustment program (ESAP)
Zimbabwe
Economic crisis
Employment opportunities

description: The informal sector plays a vital role in the economic development of many countries, particularly in job creation, income generation, and poverty alleviation. In Zimbabwe, the informal sector has experienced significant growth, fueled by economic challenges such as the structural adjustment program (ESAP) and subsequent crises. ESAP led to job losses in both the public and private sectors, while the recent economic and political crisis saw a decline in formal employment opportunities and plummeting real wages due to hyperinflation. Consequently, the expansion of Zimbabwe's informal sector can be attributed to the increasing need to supplement formal incomes amidst dwindling employment prospects. This review examines the dynamics of Zimbabwe's informal sector, exploring its evolution in response to economic changes and its implications for livelihoods and economic resilience.
Search for the Rare Leptonic Decays \boldmath{\Blnu} ($\ell=e,μ$)
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have performed a search for the rare leptonic decays \Bp \to \ellp \nul ($l=e,μ$), using data collected at the \FourS resonance by the \babar\ detector at the \pep2 storage ring. In a sample of 468 million \BB pairs we find no evidence for a signal and set an upper limit on the branching fractions $\BR(\bmunu) < 1.0\times10^{-6}$ and $\BR(\benu) < 1.9\times10^{-6}$ at the 90% confidence level, using a Bayesian approach.
description: 8 pages, 4 figures
Equimetrics -- Applying HAR principles to equestrian activities
Creators: name: Pöhler, Jonas
name: Van Laerhoven, Kristof
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: This paper presents the Equimetrics data capture system. The primary objective is to apply HAR principles to enhance the understanding and optimization of equestrian performance. By integrating data from strategically placed sensors on the rider's body and the horse's limbs, the system provides a comprehensive view of their interactions. Preliminary data collection has demonstrated the system's ability to accurately classify various equestrian activities, such as walking, trotting, cantering, and jumping, while also detecting subtle changes in rider posture and horse movement. The system leverages open-source hardware and software to offer a cost-effective alternative to traditional motion capture technologies, making it accessible for researchers and trainers. The Equimetrics system represents a significant advancement in equestrian performance analysis, providing objective, data-driven insights that can be used to enhance training and competition outcomes.
description: 5 pages, 6 figures, Additional materials can be found at: https://zenodo.org/records/13367775
PART I: MODELING WITH PREDICTION OF BURST PRESSURE OF ELLIPTICAL CORRODED PIPELINE
Creators: name: AICHA METEHRI
name: BELAID MECHAB
name: BEL ABBES BACHIR BOUADJRA
Publisher: name: Zenodo
Year: 2024
Subjects: Modeling, Burst pressure, Pipeline, Corrosion, Steel, FE.

description: Abstract

The objective of this study is to develop a new model predicting the burst pressure of an elliptical defect in a corroded pipe under internal pressure. The effects of geometric parameters on the pipeline performance were analyzed. The results of our analytical model were compared with those of the well-known LPC model for unrepaired corroded pipes, and there is a good agreement between the two models. For the corroded steel pipe, the comparison between the newly developed model and finite element (FE) calculations also showed a good agreement.
Additional file 2: of Recombinant CTRP9 administration attenuates neuroinflammation via activating adiponectin receptor 1 after intracerebral hemorrhage in mice
Creators: name: Zhao, Lianhua
name: Chen, Shengpan
name: Sherchan, Prativa
name: Ding, Yan
name: Zhao, Wei
name: Guo, Zaiyu
name: Yu, Jing
name: Tang, Jiping
name: Zhang, John
Publisher: name: figshare
Year: 2018
Subjects: subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Table S1. Summary of experimental groups and mortality rate in the study. (DOCX 21Â kb)
Accreting White Dwarfs as Supersoft X-ray Sources
Creators: name: Kato, Mariko
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: I review various phenomena associated with mass-accreting white dwarfs (WDs) in the view of supersoft X-ray sources. When the mass-accretion rate is low (\dot M_{acc} < a few \times 10^{-7} M_\sun yr^{-1}), hydrogen nuclear burning is unstable and nova outbursts occur. A nova is a transient supersoft X-ray source (SSS) in its later phase which timescale depends strongly on the WD mass. The X-ray turn on/off time is a good indicator of the WD mass. At an intermediate mass-accretion rate an accreting WD becomes a persistent SSS with steady hydrogen burning. For a higher mass-accretion rate, the WD undergoes "accretion wind evolution" in which the WD accretes matter from the equatorial plane and loses mass by optically thick winds from the other directions. Two SSS, namely RX J 0513-69 and V Sge, are corresponding objects to this accretion wind evolution. We can specify mass increasing WDs from light-curve analysis based on the optically thick wind theory using multiwavelength observational data including optical, IR, and supersoft X-rays. Mass estimates of individual objects give important information for the binary evolution scenario of type Ia supernovae.
description: 6 pages including 10 figures, conference proceedings of "Supersoft X-ray Sources - New Developments" (18th - 20th May 2009, European Space Astronomy Centre (ESAC), Villafranca del Castillo, Madrid, Spain)
Electronic Supplementary Materials from Three-dimensional surface morphometry differentiates behaviour on primate stone tools
Creators: name: Proffitt, Tomos
name: Reeves, Jonathan S.
name: Benito-Calvo, Alfonso
name: Sánchez-Romero, Laura
name: Arroyo, Adrián
name: Malaijivitnond, Suchinda
name: Luncz, Lydia V.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Document containing all supplementary materials, including workflows, github link to custom scripts, electronic supplementary figure S1-S5, and electronic supplementary tables S1 - S11
Media representations of the Colten Boushie case : a critical discourse analysis of property, rural crime, and laissez-faire racism
Creators: name: Mudde, Laura
Publisher: name: University of British Columbia
Year: 2024

description: This dissertation analyzes the media’s portrayal of the Colten Boushie case, who was killed by Gerald Stanley in Saskatchewan, Canada. This case and its media representations sparked debates about race, property, and rural crime. Despite some research delving into this case and the controversies it triggered, a substantive analysis of the media’s role is missing. Such an analysis is relevant, as it sheds light on how media framing impacts public discourse and policy to deepen our understanding of Indigenous-settler relations in Canada. An inductive and iterative frame analysis of sources published between August 2016 and April 2020 informed my critical discourse analysis of prominent themes. I problematize the media’s framing as promoting oppositional interpretations of events that reflect a group positioning, polarizing ambivalent and contingent frames along Indigenous-settler and rural-urban interpretations of the case. This research reveals the roles of the media in affirming and challenging specific legal and political orders in Canada. A frame analysis of the sources renders visible the normative ideas that perpetuate the power dynamics of settler-colonial discourse. This research emphasizes the significance of frame analysis as a method to examine how ideas are conveyed and disseminated to different publics. It problematizes the diverse attitudes that are circulated in different provinces with attention to differences evident in small, medium, and larger population centres. Contradictory patterns emerge that point to both an awareness of settler colonial realities and continued negative colonial attitudes toward Indigenous people in Canada. I address these contradictions by testing my frame analysis results against the theory of laissez-faire racism. Laissez-faire racism is informed by group position theory and refers to contemporary constructs of racial prejudice that continue Indigenous disadvantage as a legacy of colonial discrimination. I use the theory of laissez-faire racism to interpret the overt and covert racial ideologies discerned in my frame analysis of the Colten Boushie case and Indigenous-settler relations in Canada.
The nucleon's octet axial-charge g_A^8 with chiral corrections
Creators: name: Bass, Steven D.
name: Thomas, Anthony W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The value of the nucleon's flavour-singlet axial-charge extracted from polarised deep inelastic scattering is sensitive to the value of the octet axial-charge g_A^8 which is usually taken from an analysis of hyperon beta-decays within the framework of SU(3) symmetry, namely 0.58 \pm 0.03. Using the Cloudy Bag model we find that the value of g_A^8 is reduced by as much as 20% below the usual phenomenological value. This increases the value of the flavour singlet axial charge (g_A^0|_inv) derived from deep inelastic data and significantly reduces the difference between it and g_A^8.
description: 12 pages
Additional file 2 of Combined use of CA125, neutrophil/lymphocyte ratio and platelet/lymphocyte ratio for the diagnosis of borderline and malignant epithelial ovarian tumors
Creators: name: Huang, Ke
name: Xu, Shengjie
name: Wang, Jiatong
name: Ge, Lili
name: Xu, Juan
name: Jia, Xuemei
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: Additional file 2: Supplementary data 2. Comparison of AUC of single and combined use of CA125, NLR and PLR.
Quantum thermodynamics of a charged magneto-oscillator coupled to a heat bath
Creators: name: Bandyopadhyay, Malay
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Explicit results for various quantum thermodynamic function (QTF) of a charged magneto-oscillator coupled to a heat bath at arbitrary temperature are demonstrated in this paper. Discernible expressions for different QTF in the two limits of very low and very high temperatures are presented for three popular heat bath models : Ohmic, single relaxation time and blackbody radiation. The central result is that the effect of magnetic field turns out to be important at low temperatures yet crucial at high temperatures. It is observed that the dissipation parameter, $γ$, and the cyclotron frequency, $ω_c$, affect the decaying or rising behaviour of various QTF in just the opposite way to each other at low temperatures. In the high temperature regime, the effect of $γ$ is much pronounced than that of $ω_c$.
description: 26 Pages, 18 Figures
Development of a microfluidic human airway-on-a-chip with cell-laden hydrogel for studying aerosol inhalation exposure with application demonstrated using whole wood smoke
Creators: name: Bennet, Tanya Jane
Publisher: name: University of British Columbia
Year: 2024

description: Over the years climate change has led to an increase in the occurrence and frequency of forest fires worldwide. As these events create smoke containing harmful particulates and gases that are difficult to avoid and can travel long distances, they can have a tremendous impact on public health. For those with pre-existing respiratory diseases the risks associated with exposure are heightened as exposure can exacerbate symptoms resulting in hospitalization and disease progression. To advance our understanding of smoke related risks to respiratory health, there is a need for more physiologically relevant in vitro models, especially those compatible with realistic aerosol-based exposures. Current microfluidic lung-on-a-chip technologies have emerged as promising tools for exposures, however their lack of a realistic 3D ECM and/or vasculature limits their ability to capture cell-cell and cell-ECM interactions. The work in this dissertation focuses on the development of a tri-culture microfluidic in vitro model of the human small conducting airways compatible with aerosolized wood smoke exposure. The airway-on-a-chip leverages a compartmentalized microchannel design in combination with a lumen patterned, cell-laden hydrogel to mimic the airways. The combination of photopolymerizable hydrogel and sacrificial molding enables the device to replicate the airway’s 3D ECM and microarchitecture including the microvasculature which is achieved by using the lumen structure as a vessel template. The hydrogel selection process in which potential hydrogels were assessed by comparing their properties to the native lung ECM is described within this dissertation. Integration of the hydrogel into the microdevice was validated by ensuring that the cells that make up the airway-on-a-chip were healthy and viable, as well were able to recapitulate key biological responses. A controllable dynamic microenvironment and recapitulation of physiological flows and flow-related shear stresses was achieved via two pump-based flow systems. Novel wood smoke exposures performed on the airway-on-a-chip demonstrated the microdevices ability to mimic in vivo-like exposure and recapitulate wood smoke-induced cell damage and inflammation. The dissertation also demonstrates that using a biodegradable film to separate vertically stacked microchannels rather than a traditional synthetic membrane enables direct epithelial-ECM interactions and creates a model free of non-physiological materials at cell-cell and cell-ECM interfaces.
A UV Sensitive Integrated Micromegas with Timepix Readout
Creators: name: Melai, Joost
name: Breskin, Amos
name: Cortesi, Marco
name: Bilevych, Yevgen
name: Fransen, Martin
name: van der Graaf, Harry
name: Visschers, Jan
name: Carballo, Victor Blanco
name: Salm, Cora
name: Schmitz, Jurriaan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: This article presents a detector system consisting of three components, a CMOS imaging array, a gaseous-detector structure with a Micromegas layout and a UV-photon sensitive CsI reflective photocathode. All three elements have been monolithically integrated using simple post-processing steps. The Micromegas structure and the CMOS imaging chip are not impacted by the CsI deposition. The detector operated reliably in He/isobutane mixtures and attained charge gains with single photons up to a level of 6 \cdot 10^4. The Timepix CMOS array permitted high resolution imaging of single UV-photons. The system has an MTF50 of 0.4 lp/pixel which corresponds to app. 7 lp/mm.
description: 4 pages with 8 figures. Submitted to Nucl. Instr. and Meth. A (Elsevier) for proceedings of VCI 2010.
An optical device for ultra-cold neutrons - Investigation of systematic effects and applications
Creators: name: Plonka-Spehr, C.
name: Kraft, A.
name: Iaydjiev, P.
name: Klepp, J.
name: Nesvizhevsky, V.
name: Geltenbort, P.
name: Lauer, Th.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We developed an optical device for ultra-cold neutrons and investigated the influence of a tilt of its guiding components. A measurement of the time-of-flight of the neutrons through the device by means of a dedicated chopper system was performed and a light-optical method for the alignment of the guiding components is demonstrated. A comparative analysis of former experiments with our results shows the potential of such a device to test the electrical neutrality of the free neutron on the $10^{-22} q_{\rm e}$ level and to investigate the interaction of neutrons with gravity.
Gamma Rays from Annihilations at the Galactic Center in a Physical Dark Matter Distribution
Creators: name: Lapi, A.
name: Paggi, A.
name: Cavaliere, A.
name: Lionetto, A.
name: Morselli, A.
name: Vitale, V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss the gamma-ray signal to be expected from dark matter (DM)annihilations at the Galactic Center. To describe the DM distribution in the Galactic halo we base on the Jeans equation for self-gravitating, anisotropic equilibria. In solving the Jeans equation, we adopt the specific correlation between the density ρ(r) and the velocity dispersion σ^2_r(r) expressed by the powerlaw behavior of the DM `entropy' K= σ_r^2/ρ^{2/3} ~ r^αwith α~ 1.25-1.3. Indicated (among others) by several recent N-body simulations, this correlation is privileged by the form of the radial pressure term in the Jeans equation, and yields a main body profile consistent with the classic self-similar development of DM halos. In addition, we require the Jeans solutions to satisfy regular boundary conditions both at the center (finite pressure, round gravitational potential) and in the outskirts (finite overall mass). With these building blocks we derive physical solutions, dubbed `α-profiles'. We find the one with α=1.25, suitable for the Galaxy halo, to be intrinsically flatter at the center relative to the empirical NFW formula, yet steeper than the empirical Einasto profile. So on scales of 10^{-1} deg it yields annihilation fluxes lower by a factor 5 than the former yet higher by a factor 10 than the latter; such fluxes will eventually fall within the reach of the Fermi satellite. We show the effectiveness of the α-profile in relieving the astrophysical uncertainties related to the macroscopic DM distribution, and discuss its expected performance as a tool instrumental to interpret the upcoming gamma-ray data in terms of DM annihilation.
description: 7 pages, 2 figures, uses aa.cls. Accepted by A&A
Control of the entanglement of a two-level atom in a dissipative cavity via a classical field
Creators: name: Zhang, Jian-Song
name: Xu, Jing-Bo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the entanglement dynamics and purity of a two-level atom, which is additionally driven by a classical field, interacting with a coherent field in a dissipative environment. It is shown that the amount of entanglement and the purity of the system can be improved by controlling the classical field.
description: 5 pages, 4 figures
Sensor Based on Extending the Concept of Fidelity to Classical Waves
Creators: name: Taddese, Biniyam Tesfaye
name: Hart, James
name: Antonsen, Thomas M.
name: Ott, Edward
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We propose and demonstrate a remote sensor scheme by applying the quantum mechanical concept of fidelity loss to classical waves. The sensor makes explicit use of time-reversal invariance and spatial reciprocity in a wave chaotic system to sensitively and remotely measure the presence of small perturbations. The loss of fidelity is measured through a classical wave-analog of the Loschmidt echo by employing a single-channel time-reversal mirror to rebroadcast a probe signal into the perturbed system. We also introduce the use of exponential amplification of the probe signal to partially overcome the effects of propagation losses and to vary the sensitivity.
description: 4 pages, 2 figures
title: SIMULATION OF INVERSE HALL-PETCH RELATION IN NANOCRYSTALLINE CERAMICS BY DISCRETE DISLOCATION DYNAMICS METHOD
Creators: name: Bobylev, S.V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2020

description: A theoretical model of plastic deformation of nanocrystalline ceramics in the
region of small grain sizes is proposed. In the framework of the model, deformation is
described as the combined action of grain boundary sliding and emission of lattice
dislocations from triple junctions of grain boundaries. Using the method of discrete
dislocation dynamics we obtained an inverse Hall-Petch relation, which qualitatively
coincides with the experimentally measured dependences of microhardness in nanocrystalline
ceramics with extremely small grain sizes.
A modular quintic Calabi-Yau threefold of level 55
Creators: name: Lee, Edward
Publisher: name: arXiv
Year: 2009
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14J32; 14J15

description: In this note we search the parameter space of Horrocks-Mumford quintic threefolds and locate a Calabi-Yau threefold which is modular, in the sense that the L-function of its middle-dimensional cohomology is associated to a classical modular form of weight 4 and level 55.
The role of chaos in quantum communication through a dynamical dephasing channel
Creators: name: Lemos, Gabriela Barreto
name: Benenti, Giuliano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In this article we treat the subject of chaotic environments with few degrees of freedom in quantum communication by investigating a conservative dynamical map as a model of a dephasing quantum channel. When the channel's dynamics is chaotic, we investigate the model's semi-classical limit and show that the entropy exchange grows at a constant rate which depends on a single parameter (the interaction strength), analogous to stochastic models of dephasing channels. We analyze memory effects in the channel and present strong physical arguments to support that the present model is forgetful in the chaotic regime while memory effects in general cannot be ignored when channel dynamics is regular. In order to render the non-chaotic channel forgetful, it becomes necessary to apply a reset to the channel and this reset can efficiently be modeled by application of a chaotic map. We may then refer to encoding theorems (valid in the case of forgetful channels) to present evidence of a transition from noiseless to noisy channel due to the environment's transition from regular to chaotic dynamics.
description: 11 pages, 6 figures.
Supplementary document for Vacuum-deposited Rb3CeI6 for Deep Blue Light Emitting Diodes - 6368420.pdf
Creators: name: Du, Hainan
name: Yang, Longbo
name: Pang, Jincong
name: Shen, Zixi
name: Li, jinghui
name: Dong, Xiaohua
name: Luo, Yiqi
name: Luo, Jiajun
name: Tang, Jiang
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: The supplemental document describes the details of Rb3CeI6 film and ReLEDs device preparations, exhibits supplementary characterization on the elementary compositions and morphologies of Rb3CeI6 film (SEM, ICP, XPS) and ReLEDs device (AFM), further a
Nucleation of superconductivity under rapid cycling of electric field
Creators: name: Bandyopadhyay, Malay
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The effect of an externally applied high frequency oscillating electric field on the critical nucleation field of superconductivity in the bulk as well as at the surface of a superconductor is investigated in details in this work. Starting from the linearized time dependent Ginzburg-Landau (TDLG) theory and using the variational principle we have shown the analogy between a quantum harmonic oscillator with that of the nucleation of superconductivity in bulk and a quantum double oscillator with that of the nucleation at the surface of a finite sample. The effective Hamiltonian approach of Cook {\it et al} \cite{cook} is employed to incorporate the effect of an externally applied highly oscillating electric field. The critical nucleation field ratio is also calculated from the ground state energy method. The results obtained from these two approximated theories agree very well with the exact results for the case of undriven system which establishes the validity of these two approximated theories. It is observed that the highly oscillating electric field actually increases the bulk critical nucleation field ($H_{c_2}$) as well as the surface critical nucleation field ($H_{c_3}$) of superconductivity as compared to the case of absence of electric field ($\varepsilon_0=0$). But the externally applied rapidly oscillating electric field accentuates the surface critical nucleation field more than the bulk critical nucleation field i.e. the increase of $H_{c_3}$ is 1.6592 times larger than that of $H_{c_2}$.
description: 7 double column pages, 3 figures
Transcriptome and Metagenome data of P. indicus
Creators: name: Jangam, Ashok Kumar
Publisher: name: figshare
Year: 2021
Subjects: subject: 70401 Aquaculture
subject: FOS: Agriculture, forestry and fisheries
subject: 60408 Genomics
subject: FOS: Biological sciences
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Aim of this study was to understand primarily the gene content of juvenile Indian white shrimps along with the intestinal microbial communities, which would act as a useful resource for the future studies This Project contains the list of data including fasta file, figures tables, annotations reports and annotation summary.
Real-time tracking of surgical tissue
Creators: name: Schmidt, Adam
Publisher: name: University of British Columbia
Year: 2024

description: This thesis addresses the problem of tracking surgical tissue using camera data in robotically assisted minimally invasive surgery. Millions of robotically assisted surgeries are performed yearly. These surgeries are performed by a surgeon who uses a teleoperation console. This console gives the surgeon a 3D view of their environment as they perform surgery. If we would like to overlay preoperative scans onto the surgeon's field of view using augmented reality, we must understand where the tissue is and where it is moving. Additionally, to enable automation of tasks, or remembering measurements made at tissue locations, such as a biopsy, we require robust tracking. In this thesis, we first perform an in-depth review of the field. We then propose multiple interlocking pieces to enable tissue tracking. To enable tracking salient features, we design a real-time keypoint descriptor that is trained in an unsupervised manner, demonstrating improved performance over classical methods. Afterwards, we propose a novel method that uses these keypoints to parameterize motion in 2D space using graph neural networks. We demonstrate the efficiency of this graph interpolation method. We then incorporate a temporal model into this graph interpolation paradigm. Finally, we extend our graph interpolation algorithm into 3D. In developing our methodology, we realized that there is an acute need for more datasets for quantification. We develop a novel and complete dataset for tissue tracking and mapping and release our dataset for public use by researchers. We close with a summary of important future work.
Calculus with a Quaternionic Variable
Creators: name: Schwartz, Charles
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Most of theoretical physics is based on the mathematics of functions of a real or a complex variable; yet we frequently are drawn to try extending our reach to include quaternions. The non-commutativity of the quaternion algebra poses obstacles for the usual manipulations of calculus; but we show in this paper how many of those obstacles can be overcome. The surprising result is that the first order term in the expansion of F(x+delta) is a compact formula involving both F'(x) and [F(x) - F(x*)]/(x-x*). This advance in the differential calculus for quaternionic variables also leads us to some progress in studying integration.
description: 16 pages
Magnetism and orbital-ordering in an interacting three band model: a dynamical mean field study
Creators: name: Chan, Ching-Kit
name: Werner, Philipp
name: Millis, Andrew J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Single-site dynamical mean field theory is used to determine the magnetic and orbital-ordering phase diagram for a model of electrons moving on a lattice with three orbital states per site and with the fully rotationally invariant Slater-Kanamori on-site interactions. The model captures important aspects of the physics of transition metal oxides with partially filled $t_{2g}$ shells, and of electron-doped C$_{60}$. We introduce an unbiased, computationally simple and inexpensive method for estimating the presence of two sublattice order, determine the regimes in which spatially uniform and two-sublattice spin and orbital orderings are present and give physical arguments for the origins of the different phases. Guidelines are determined for optimizing the presence of ferromagnetism, which may be desirable in applications
Molecular vibrational cooling by Optical Pumping with shaped femtosecond pulses
Creators: name: Sofikitis, Dimitris
name: Weber, Sebastien
name: Fioretti, Andréa
name: Horchani, Ridha
name: Allegrini, Maria
name: Chatel, Béatrice
name: Comparat, Daniel
name: Pillet, Pierre
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Some of us have recently reported in Science 321 232 (2008) vibrational cooling of translationally cold Cs_2 molecules into the lowest vibrational level v=0 of the singlet X 1Sigma_g ground electronic state. Starting from a sample of cold molecules produced in a collection of vibrational levels of the ground state, our method was based on repeated optical pumping by laser light with a spectrum broad enough to excite all populated vibrational levels but frequency-limited in such a way to eliminate transitions from v=0 level, in which molecules accumulate. In this paper this method is generalized to accumulate molecules into an arbitrary selected "target" vibrational level. It is implemented by using ultrashort pulse shaping techniques based on Liquid Crystal spatial light modulator. In particular a large fraction of the initially present molecule is transferred into a selected vibrational level such as v=1, 2 and 7. Limitations of the method as well as the possible extension to rotational cooling are also discussed.
description: TO be published in New Journal of Physics
Effective time-reversal symmetry breaking in the spin relaxation in a graphene quantum dot
Creators: name: Struck, P. R.
name: Burkard, Guido
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the relaxation of a single electron spin in a circular gate-tunbable quantum dot in gapped graphene. Direct coupling of the electron spin to out-of-plane phonons via the intrinsic spin-orbit coupling leads to a relaxation time T_1 which is independent of the B-field at low fields. We also find that Rashba spin-orbit induced admixture of opposite spin states in combination with the emission of in-plane phonons provides various further relaxation channels via deformation potential and bond-length change. In the absence of valley mixing, spin relaxation takes place within each valley separately and thus time-reversal symmetry is effectively broken, thus inhibiting the van Vleck cancellation at B=0 known from GaAs quantum dots. Both the absence of the van Vleck cancellation as well as the out-of-plane phonons lead to a behavior of the spin relaxation rate at low magnetic fields which is markedly different from the known results for GaAs. For low B-fields, we find that the rate is constant in B and then crosses over to ~B^2 or ~B^4 at higher fields.
description: 5 pages, 2 figures, 1 table
Berry-phase theory of polar discontinuities at oxide-oxide interfaces
Creators: name: Stengel, Massimiliano
name: Vanderbilt, David
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the framework of the modern theory of polarization, we rigorously establish the microscopic nature of the electric displacement field D. In particular, we show that the longitudinal component of D is preserved at a coherent and insulating interface. To motivate and elucidate our derivation, we use the example of LAO/STO interfaces and superlattices, where the validity of the above conservation law is not immediately obvious. Our results generalize the "locality principle" of constrained-D density functional theory to the first-principles modeling of charge-mismatched systems.
description: 4 pages, 2 figures
Thermal hadron production in relativistic nuclear collisions: the hadron mass spectrum, the horn, and the QCD phase transition
Creators: name: Andronic, A.
name: Braun-Munzinger, P.
name: Stachel, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present, using the statistical model, a new analysis of hadron production in central collisions of heavy nuclei. This study is motivated by the availability of final measurements both for the SPS (beam energies 20-160 AGeV) and for the RHIC energies ($\sqrt{s_{NN}}$=130 and 200 GeV) and by updates in the hadron mass spectrum, which is a crucial input for statistical models. Extending previous studies by inclusion of very high-mass resonances (m> 2 GeV), and the up-to-now neglected scalar $σ$ meson leads to an improved description of the data. In particular, the hitherto poorly reproduced energy dependence of the $K^+/π^+$ ratio at SPS energies ("the horn") is now well described through the connection to the hadronic mass spectrum and, implicitly, Hagedorn's limiting temperature. We thereby demonstrate the intimate connection between the horn and the QCD phase transition.
description: 9 pages, 4 figures, accepted in Phys. Lett. B (v2: estimate of possible effects of higher mass resonances, correction in Fig.1, ref. added; v3: typo in Eq.(1) corrected)
Electrogastrography: An Overview with Applications
Creators: name: Miljković, Nadica
Publisher: name: Zenodo
Year: 2021
Subjects: electrophysiology
biosignal
biomedical signal processing
signal processing
electrohysterography
electrogastrography
cybersickness
motion sickness
gut feeling
nausea
feature extraction
noise elimination
brain-stomach coupling

description: IEEE ED/IM/SSC and SP/EMB invited lecture held online at the Ss. Cyril and Methodius University in Skopje on April 20, 2021 in English by Associate Professor Nadica Miljković from University of Belgrade - School of Electrical Engineering. The announcement is also available on the Facebook page of IEEE Republic of Macedonia Section. ABSTRACT Exploration of electrical potentials in the human body has been subject of extensive scientific work and, among others, resulted in diverse clinical applications. Commonly known methods such as electrocardiography, electromyography, and electroencephalography have been studied at a large scale, whilst a body of knowledge of properties and application of electrical biosignals such as electrohysterogram and electrogastrogram remains scarce. In this talk, origin, development, and current state of methods and applications for electrogastrography will be presented and discussed. The ability to measure and analyze electrical activity originating from the smooth stomach muscles non-invasively (surface electrogastrography) makes this method a good candidate for scientific studies and diagnostics. However, the main barriers are its low amplitude (~ 100 μV) and low frequency (~0.05 Hz) content, making the surface electrogastrogram complex to record and analyze due to its vulnerability to noise. Recently published results showed that the electrogastrogram might be measured in a dynamic environment for assessment of cybersickness making it a promising technique for further investigation and utilization. This talk will also address interesting approaches such as procedures for studying brain-stomach coupling and gut feeling as well as clinical applications.
description: The second version contains a smaller file size with compressed images.