cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Sustainable management of wood for charcoal manufacturing activity in the Northern Pyrenees : dendro-anthracological study of charcoal kilns in the Bernadouze forest (Suc-et-Sentenac, Haut-Vicdessos) .
Creators: name: Fouedjeu Foumou, Léonel
name: Paradis-Grenouillet, S.
name: Cunill, Raquel
name: Saulnier, Mélanie
name: Buscaino, Sandrine
name: Py, Vanessa
Publisher: name: UMR 5602 CNRS/UT2J GEODE Géographie De l'Environnement 5 All. A. Machado 31058 Toulouse France
Year: 2019
Subjects: subject: FOS: History and archaeology
valueUri: http://www.oecd.org/science/inno/38235147.pdf
subject: FOS: Humanities
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: This poster presents the results of the dendro-anthracological analysis of charcoals collected in 16 charcoal kilns (CKs) located between 1300 and 1500 m ASL in the Bernadouze forest (Suc-et-Sentenac valley, French Pyrenees) (Fig. 1 and 3) and dated from the 11th to the 20th century. This study aims to restitute the minimum initial diameter of wood collected by charcoal burners in order to provide new insights into wood harvesting strategies, charcoal manufacturing and sylvicultural practices for charcoal products on intended to iron industry. This activity had been on a strong upward trend between the 14th to the 19th centuries.
Jet-like structures from PSR J1135-6055
Creators: name: Bordas, Pol
name: Zhang, Xiying
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Pulsar wind nebulae (PWNe) produced from supersonic runaway pulsars can render extended X-ray structures in the form of tails and prominent jets. In this Letter we report on the analysis of $\sim$130 ks observations of the PWN around PSR$\,$J1135-6055 obtained with the Chandra satellite. The system displays bipolar jet-like structures of uncertain origin, a compact nebula around the pulsar likely formed by the bow shock ahead of it, and a trailing tail produced by the pulsar fast proper motion. The spectral and morphological properties of these structures reveal strong similarities with the PWNe in other runaway pulsars like PSR J1509-5850 and Geminga. We discuss their physical origin considering both canonical PWN and jet formation models as well as alternative scenarios that can also yield extended jet-like features following the escape of high-energy particles into the ambient magnetic field.
description: Accepted for publication in A&A
Wartenberg-Potter, Bärbel: Anfängerin - Zeitgeschichten meines Lebens
Creators: name: Hinz, Rudolf
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 63 Nr. 2 (2014): Ökumenische Rundschau, Band 63, Heft 2
Event Camera Calibration of Per-pixel Biased Contrast Threshold
Creators: name: Wang, Ziwei
name: Ng, Yonhon
name: van Goor, Pieter
name: Mahony, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Event cameras output asynchronous events to represent intensity changes with a high temporal resolution, even under extreme lighting conditions. Currently, most of the existing works use a single contrast threshold to estimate the intensity change of all pixels. However, complex circuit bias and manufacturing imperfections cause biased pixels and mismatch contrast threshold among pixels, which may lead to undesirable outputs. In this paper, we propose a new event camera model and two calibration approaches which cover event-only cameras and hybrid image-event cameras. When intensity images are simultaneously provided along with events, we also propose an efficient online method to calibrate event cameras that adapts to time-varying event rates. We demonstrate the advantages of our proposed methods compared to the state-of-the-art on several different event camera datasets.
description: 11 pages, 7 figures, the paper has been accepted for publication at the Australian Conference on Robotics and Automation, 2019
An evaluation of an acute pain service program
Creators: name: Pesut, Barbara Kay
Publisher: name: University of British Columbia
Year: 2009

description: The Acute Pain Service (APS), a multi-disciplinary team responsible for acute postoperative pain management, has been a recent development in hospitals. The purpose of this study was to increase our understanding regarding the effectiveness of APSs, to evaluate the impact of the implementation of an APS on pain management within an acute care hospital, and to make recommendations for the improvement of the APS under study. A program evaluative method guided the study design that consisted of three phases. The objective of the first phase was to describe the implementation of the APS. Interviews and a document review provided data that was then analyzed to identify the forces and challenges that shaped three eras in the historical development of the service. The objective of the second phase was to assess the nursing and medical staff satisfaction with the APS through surveys and interviews. Analysis of the data revealed that while the staff was generally satisfied with the program, there were several areas identified for improvement. The objective of the third phase was to assess the impact of the APS on the control of acute pain. A retrospective chart review comparing two groups of abdominal surgery patients using patient-controlled analgesia failed to show any significant difference between acute pain outcomes before and after the implementation of the service. The development of an APS, and its ultimate effectiveness, is dependent upon a number of resources: education, clinical support and adequate communication structures. Control issues surrounding pain management may arise as a result of the implementation of an APS. Immediate recommendations for this program included increasing the visibility of the APS, decreasing the workload associated with the APS modalities, establishing an effective communication network and increasing clinical support to the program. Recommendations for future improvement included strengthening collaboration with the surgeons, promoting more efficient bed utilization by expanding the epidural local anesthesia program and repeating the program evaluation once changes are implemented. Several areas for further research surrounding acute pain outcomes and patient-controlled analgesia were identified.
Deep optical study of the mixed-morphology supernova remnant G 132.7+1.3 (HB3)
Creators: name: Boumis, P.
name: Chiotellis, A.
name: Fragkou, V.
name: Akras, S.
name: Derlopa, S.
name: Kopsacheili, M.
name: Leonidaki, I.
name: Alikakos, J.
name: Palaiologou, E. V.
name: Harvey, E.
name: Souropanis, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present optical ccd images of the large supernova remnant (SNR) G132.7$+$1.3 (HB3) covering its full extent for the first time, in the emission lines of H$α+$[N II], [S II] and [O III], where new and known filamentary and diffuse structures are detected. These observations are supplemented by new low-resolution long-slit spectra and higher-resolution images in the same emission lines. Both the flux-calibrated images and spectra confirm that the optical emission originates from shock-heated gas since the [S II]/H$α$ $>$ 0.4. Our findings are also consistent with the recently developed emission line ratio diagnostics for distinguishing SNRs from H II regions. A multi-wavelength comparison among our optical data and relevant observations in radio, X-rays, $γ$-rays and CO bands, provided additional evidence on the interaction of HB3 with the surrounding clouds and clarified the borders of the SNR and the adjacent cloud. We discuss the supernova (SN) properties and evolution that led to the current observables of HB3 and we show that the remnant has most likely passed at the pressure driven snowplow phase. The estimated SN energy was found to be $\left(3.7 \pm 1.5\right) \times 10^{51}$ erg and the current SNR age $\left(5.1 \pm 2.1\right) \times 10^4$ yrs. We present an alternative scenario according to which the SNR evolved in the wind bubble cavity excavated by the progenitor star and currently is interacting with its density walls. We show that the overall mixed morphology properties of HB3 can be explained if the SN resulted by a Wolf-Rayet progenitor star with mass $\sim 34 \rm~M_{\rm\odot}$.
description: 20 pages, 8 figures, accepted for publication in MNRAS
Desambiguação de nomes de autores: um desafio para os repositórios
Creators: name: Pereira Rodrigues, Maria Eduarda
name: Moitinho Rodrigues, António
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Pecha Kucha III, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
A comprehensive Nbody study of mass segregation in star clusters: Energy equipartition and escape
Creators: name: Khalisi, Emil
name: Amaro-Seoane, Pau
name: Spurzem, Rainer
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We address the dynamical evolution of an isolated self--gravitating system with two stellar mass groups. We vary the individual ratio of the heavy to light bodies, $μ$ from 1.25 to 50 and alter also the fraction of the total heavy mass $\MH$ from 5% to 40% of the whole cluster mass. Clean-cut properties of the cluster dynamics are examined, like core collapse, the evolution of the central potential, as well as escapers. We present in this work collisional $N$-body simulations, using the high--order integrator NBODY6++ with up to ${\cal N}_{\star}=2\cdot 10^4$ particles improving the statistical significancy of the lower--${\cal N}_{\star}$ simulations by ensemble averages. Equipartition slows down the gravothermal contraction of the core slightly. Beyond a critical value of $μ\approx 2$, no equipartition can be achieved between the different masses; the heavy component decouples and collapses. For the first time the critical boundary between Spitzer--stable and --unstable systems is demonstrated in direct $N$-body models.
description: 21 pages, minor changes, accepted for publication MNRAS, needs mn2e.bst and mn2e.cls (included)
Quantum Shot Noise
Creators: name: Beenakker, C. W. J.
name: Schonenberger, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: 1. Types of electrical noise 2. Measuring the unit of transferred charge 3. Quiet electrons 4. Detecting open transmission channels 5. Distinguishing particles from waves 6. Entanglement detector
description: legacy review (7 pages, 5 figures)
Thermal Properties of Deng-Fan-Eckart Potential model using Poisson Summation Approach
Creators: name: Edet, C. O.
name: Okorie, U. S.
name: Osobonye, G.
name: Ikot, A. N.
name: Rampho, G. J.
name: Sever, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Deng-Fan-Eckart (DFE) potential is as good as the Morse potential in studying atomic interaction in diatomic molecules. By using the improved Pekeris-type approximation, to deal with the centrifugal term, we obtain the bound-state solutions of the radial Schrödinger equation with this adopted molecular model via the Factorization Method. With the energy equation obtained, the thermodynamic properties of some selected diatomic molecules(H2 , CO , and ScN ) were obtained using Poisson summation method.. The unnormalized wave function is also derived. The energy spectrum for a set of diatomic molecules for different values of the vibrational n and rotational l are obtained. To show the accuracy of our results, we discuss some special cases by adjusting some potential parameters and also compute the numerical eigenvalue of the Deng-Fan potential for comparison sake. However, it was found out that our results agree excellently with the results obtained via other methods.
description: 29 pages, 18 figures, 4 tables, 4902 words
Vibrational angular momentum level densities of linear molecules
Creators: name: Hansen, Klavs
name: Ferrari, Piero
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: While linear molecules in their vibrational ground state cannot carry angular momentum around their symmetry axis, the presence of vibrational excitations can induce deformations away from linearity and therefore also allow angular momentum along the molecular axis. In this work, a recurrence relation is established for the calculation of the vibrational level densities (densities of states) of linear molecules, specified with respect to both energy and angular momentum. The relation is applied to the carbon clusters of sizes $n=4,6,7$ as a case study.
Trimming of Graphs, with Application to Point Labeling
Creators: name: Erlebach, Thomas
name: Hagerup, Torben
name: Jansen, Klaus
name: Minzlaff, Moritz
name: Wolff, Alexander
Publisher: name: arXiv
Year: 2008
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: For $t,g>0$, a vertex-weighted graph of total weight $W$ is $(t,g)$-trimmable if it contains a vertex-induced subgraph of total weight at least $(1-1/t)W$ and with no simple path of more than $g$ edges. A family of graphs is trimmable if for each constant $t>0$, there is a constant $g=g(t)$ such that every vertex-weighted graph in the family is $(t,g)$-trimmable. We show that every family of graphs of bounded domino treewidth is trimmable. This implies that every family of graphs of bounded degree is trimmable if the graphs in the family have bounded treewidth or are planar. Based on this result, we derive a polynomial-time approximation scheme for the problem of labeling weighted points with nonoverlapping sliding labels of unit height and given lengths so as to maximize the total weight of the labeled points. This settles one of the last major open questions in the theory of map labeling.
Producing cluster states in charge qubits and flux qubits
Creators: name: Tanamoto, Tetsufumi
name: Liu, Yu-xi
name: Fujita, Shinobu
name: Hu, Xuedong
name: Nori, Franco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a method to efficiently generate cluster states in charge qubits, both semiconducting and superconducting, as well as flux qubits. We show that highly-entangled cluster states can be realized by a `one-touch' entanglement operation by tuning gate bias voltages for charge qubits. We also investigate the robustness of these cluster states for non-uniform qubits, which are unavoidable in solid-state systems. We find that quantum computation based on cluster states is a promising approach for solid-state qubits.
description: 4 pages, 1 figures
Hardhats and Bungaloos: Comparing Crowdsourced Design Feedback with Peer Design Feedback in the Classroom
Creators: name: Oppenlaender, Jonas
name: Kuosmanen, Elina
name: Lucero, Andrés
name: Hosio, Simo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: K.3; J.6; J.m

description: Feedback is an important aspect of design education, and crowdsourcing has emerged as a convenient way to obtain feedback at scale. In this paper, we investigate how crowdsourced design feedback compares to peer design feedback within a design-oriented HCI class and across two metrics: perceived quality and perceived fairness. We also examine the perceived monetary value of crowdsourced feedback, which provides an interesting contrast to the typical requester-centric view of the value of labor on crowdsourcing platforms. Our results reveal that the students (N=106) perceived the crowdsourced design feedback as inferior to peer design feedback in multiple ways. However, they also identified various positive aspects of the online crowds that peers cannot provide. We discuss the meaning of the findings and provide suggestions for teachers in HCI and other researchers interested in crowd feedback systems on using crowds as a potential complement to peers.
description: 14 pages. CHI Conference on Human Factors in Computing Systems (CHI '21), May 8-13, 2021
O'ZBEKISTONDA IJTIMOIY SOHANING MUHIM YO'NALISHLARI
Creators: name: Rashidova, Aziza
Publisher: name: Zenodo
Year: 2024

description: Ushbu ish ijtimoiy sohani rivojlantirishga yo’naltirilgan ijtimoiy masalalar aholi bandligi va real daromadlarini izchil oshirib borish, ijtimoiy himoyasi va sog’lig’ini saqlash tizimini takomillashtirish, xotin-qizlarning ijtimoiy-siyosiy faolligini oshirish, arzon uy-joylar barpo etish, yo’l-transport, muhandislik-kommunikatsiya va ijtimoiy infratuzilmalarni rivojlantirish hamda modernizatsiya qilish bo’yicha maqsadli dasturlarni amalga oshirish, ta’lim, madaniyat, ilm-fan, adabiyot, san’at va sport sohalarini rivojlantirish, yoshlarga oid davlat siyosatini takomillashtirish kabi ustuvor masalalarni qisman bo’lsada yoritishga bag’ishlanadi.
Richter, Manfred: Johann Amos Comenius und das Colloquium Charitativum von Thorn 1645
Creators: name: Weber, Friedrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 63 Nr. 2 (2014): Ökumenische Rundschau, Band 63, Heft 2
Notebook (1969-1970, 1978, and 1979)
Creators: name: Hutchison, Alexander
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Theology
valueUri: http://id.worldcat.org/fast/1149559
subject: Poets, Scottish
valueUri: http://id.worldcat.org/fast/1068037
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Literature
valueUri: http://id.worldcat.org/fast/999953
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: College teachers
valueUri: http://id.worldcat.org/fast/868114
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Poetry, Modern
valueUri: http://id.worldcat.org/fast/1067769

description: Alexander ("Sandy") Hutchison (1943-2015) was a Scottish poet who taught at various colleges and universities on Vancouver Island between the 1960s-80s, including the Department of English at the University of Victoria in 1966. These notebooks contain content ranging from notes about/from various philosophers, to personal correspondence, to drafts of his poetry.
Coding Theorem for a Class of Quantum Channels with Long-Term Memory
Creators: name: Datta, Nilanjana
name: Dorlas, Tony
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we consider the transmission of classical information through a class of quantum channels with long-term memory, which are given by convex combinations of product channels. Hence, the memory of such channels is given by a Markov chain which is aperiodic but not irreducible. We prove the coding theorem and weak converse for this class of channels. The main techniques that we employ, are a quantum version of Feinstein's Fundamental Lemma and a generalization of Helstrom's Theorem.
description: Some typos corrected
The spin-spin model and the capture into the double synchronous resonance
Creators: name: Misquero, Mauricio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The aim of this article is to propose a model, that is a planar version of the Full Two-Body Problem, and discuss the existence and stability of a relevant periodic solution. Consider two homogeneous ellipsoids orbiting around each other in fixed coplanar Keplerian orbits. Moreover, their respective spin axes are assumed to be perpendicular to the orbital plane, that is also a common equatorial plane. The spin-spin model deals with the coupled rotational dynamics of both ellipsoids. For a non-zero orbital eccentricity, it has the structure of a non-autonomous system of coupled pendula. This model is a natural extension of the classical spin-orbit problem for two extended bodies. In addition, we consider dissipative tidal torques, that can trigger the capture of the system into spin-orbit and spin-spin resonances. In this paper we give some theoretical results for both the conservative model and the dissipative one. The conservative model has a Hamiltonian structure. We use properties of Hamiltonian systems to give some sufficient conditions in the space of parameters of the model, that guarantee existence, uniqueness and linear stability of an odd periodic solution. This solution represents a double synchronous resonance in the conservative regime. Such solution can be continued to the dissipative regime, where it becomes asymptotically stable. We see asymptotic stability as a dynamical mechanism for the capture into the double synchronous resonance. Finally we apply our results to several cases including the Pluto-Charon binary system and the Trojan binary asteroid 617 Patroclus, target of the LUCY mission.
Kallis, Anastasios: Auf dem Weg zu einem Heiligen und Großen Konzil
Creators: name: Basdekis, Athanasios
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 63 Nr. 2 (2014): Ökumenische Rundschau, Band 63, Heft 2
A Triple Inequality with Series and Improper Integrals
Creators: name: Smarandache, Florentin
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 26D15, 40-xx, 65Dxx

description: As a consequence of the Integral Test we find a triple inequality which bounds up and down both a series with respect to its corresponding improper integral, and reciprocally an improper integral with respect to its corresponding series.
description: 4 pages
Mothers who have left an abusive relationship : the effect of their participation in a parenting support group
Creators: name: Petersen, Karin Anne
Publisher: name: University of British Columbia
Year: 2009

description: Abuse of women in intimate relationships has gained international recognition as an important social phenomenon which has significant physical and psychological implications for those exposed to it (Heise, Pitanguy, & Germain, 1994). History has repeatedly shown that abuse does not end with separation or divorce but, rather, often increases at these times. This reality, in combination with the deleterious effects of the physical and emotional abuse within the relationship, affects the abused woman's ability to cope with the challenges faced when she leaves the abusive relationship. One of these challenges is to parent the children she may have. The role of mothering is of primary importance to these women. However, the competing issues associated with the abusive relationship and establishing a new life away from the abuser often leaves the women unprepared for the role of a single parent. One intervention that is available to assist women during this period in their lives is a parenting support group. A research study was initiated to evaluate the effect of one particular parenting support group on mothers who had left an abusive relationship. The methodology of this study was guided by a feminist perspective. Data collection involved the use of focus groups. Participants were drawn from a pool of 16 women subjects who had participated in the parenting support group program. Participants were divided into two focus group sessions. Giorgi's (1975) four stage method of phenomenological analysis was used to analyze the data. The findings of this study showed that women valued the parenting support group intervention and utilized the insight and skills they gained to move forward in their lives. The description of their experiences resulted in the development of four themes: 1) CONNECTION; 2) CONFIDENCE; 3) REFRAMING; and, 4) SELF-EFFICACY. The areas within these themes warranting further discussion were highlighted, and the implications for nursing in terms of practice, education and research were identified.
Computing Minimum Spanning Trees with Uncertainty
Creators: name: Erlebach, Thomas
name: Hoffmann, Michael
name: Krizanc, Danny
name: Mihal'ák, Matús
name: Raman, Rajeev
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We consider the minimum spanning tree problem in a setting where information about the edge weights of the given graph is uncertain. Initially, for each edge $e$ of the graph only a set $A_e$, called an uncertainty area, that contains the actual edge weight $w_e$ is known. The algorithm can `update' $e$ to obtain the edge weight $w_e \in A_e$. The task is to output the edge set of a minimum spanning tree after a minimum number of updates. An algorithm is $k$-update competitive if it makes at most $k$ times as many updates as the optimum. We present a 2-update competitive algorithm if all areas $A_e$ are open or trivial, which is the best possible among deterministic algorithms. The condition on the areas $A_e$ is to exclude degenerate inputs for which no constant update competitive algorithm can exist. Next, we consider a setting where the vertices of the graph correspond to points in Euclidean space and the weight of an edge is equal to the distance of its endpoints. The location of each point is initially given as an uncertainty area, and an update reveals the exact location of the point. We give a general relation between the edge uncertainty and the vertex uncertainty versions of a problem and use it to derive a 4-update competitive algorithm for the minimum spanning tree problem in the vertex uncertainty model. Again, we show that this is best possible among deterministic algorithms.
A Study on Factors Influencing Employees Engagement at  Metroflex  Matters, Karur
Creators: name: Mr. Sibikumar S
name: Dr.K. Ramprathap
Publisher: name: Zenodo
Year: 2025
Subjects: Employee Engagement, Job Satisfaction, Leadership, Work Environment, Organizational Culture

description: Employee engagement plays a crucial role in organizational success, impacting productivity, job satisfaction, and overall business performance. This study explores the key factors influencing employee engagement at Metroflex Mattress, Karur. The research examines work environment, leadership, job satisfaction, training and development opportunities, and organizational culture. A structured questionnaire was used to collect data from employees, alongside observational analysis to understand workplace dynamics. The findings aim to provide  recommendations for enhancing employee engagement, thereby improving overall organizational efficiency and employee retention.
Energy spectra and thermal properties of diatomic molecules in the presence of magnetic and AB fields with improved Kratzer potential
Creators: name: Rampho, G. J.
name: Ikot, A. N.
name: Edet, C. O.
name: Okorie, U. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the present study, the improved screened Kratzer potential (ISKP) is investigated in the presence of external magnetic and Aharanov-Bohm (AB) fields within the framework of non-relativistic quantum mechanics. The Schrodinger equation is solved via the Nikiforov-Uvarov Functional Analysis (NUFA) method and the energy spectra and the corresponding wave function for the ISKP in the presence of external magnetic fields are obtained in a closed form. The obtained energy spectra are used to study three selected diatomic molecules (H2, HCl and LiH). It is observed that the present of the magnetic and AB fields removes the degeneracy for different values of the control parameter. The thermodynamic and magnetic properties of the ISKP in the present of the magnetic and AB fields are also evaluated. The effects of the control potential parameter on the thermodynamic and magnetic properties of the selected diatomic molecules are discussed.
description: 37 pages, 15 figures,12 tables and 5373 words
Neutral Hydrogen Clouds near Early-Type Dwarf Galaxies of the Local Group
Creators: name: Bouchard, A.
name: Carignan, C.
name: Staveley-Smith, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Parkes neutral hydrogen 21 cm line (HI) observations of the surroundings of 9 early-type Local Group dwarfs are presented. We detected numerous HI clouds in the general direction of those dwarfs and these clouds are often offset from the optical center of the galaxies. Although all the observed dwarfs, except Antlia, occupy phase-space regions where the High-Velocity Cloud (HVC) density is well above average, the measured offsets are smaller than one would expect from a fully random cloud distribution. Possible association is detected for 11 of the 16 investigated clouds, while, for two galaxies, Sextans and Leo I, no HI was detected. The galaxies where HI clouds were found not to coincide with the optical, yet have a significant probability of being associated are: Sculptor dSph, Tucanna, LGS3, Cetus, and Fornax. If the clouds are indeed associated, these galaxies have HI masses of $M_{HI} = 2\times10^5 M_{\odot}$, $M_{HI} = 2\times10^6 M_{\odot}$, $M_{HI} = 7\times10^5 M_{\odot}$, $M_{HI} = 7\times10^5 M_{\odot}$, and $M_{HI} = 1\times10^5 M_{\odot}$, respectively. However, neither ram pressure nor tidal stripping can easily explain the offsets. In some cases, large offsets are found where ram pressure should be the least effective.
description: Accepted in AJ, June 2006
General Relativity effects and line emission
Creators: name: Matt, Giorgio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: General Relativity effects (gravitational redshift, light bending, ...) strongly modify the characteristics of the lines emitted close to the Black Hole in Active Galactic Nuclei and Galactic Black Hole systems. These effects are reviewed and illustrated, with particular emphasis on line emission from the accretion disc. Methods, based on the iron line, to measure the two astrophysically relevant parameters of a Black Hole, the mass and spin, are briefly discussed.
description: to appear in Astronomische Nachrichten, Proceedings of the ESAC Workshop "Variable and broad lines around black holes"
Effect of Compensation Structure and Distributive Justice on Employees' Job Satisfaction in Higher Educational Institutions in Gombe State
Creators: name: M. Abdullahi
name: Babangida M. M.
name: Isyaka M. S.
Publisher: name: gjrpublication
Year: 2024

description: The main purpose of the study is to examine the effect of Compensation Structure and Distributive Justice on Employee Job Satisfaction. Two research hypotheses were formulated from literature to capture the essence of this study. The research was conducted among teaching and non-teaching staff from two of the Gombe State owned Higher Educational Institutions (HEIs)that is; Gombe State Polytechnic, Bajoga and College of Education, Billiri. Convenient sampling technic was used to reach out to the 250 respondents, derived out of the entire 673 staff of the two institutions based on Krejcie and Morgan sampling size table of 1970. Data was collected through the use of adapted structured questionnaire. The toolsused for analyzing the descriptive statistics and reliability was the Statistical Package for the Social Sciences (SPSS) version 23, while the SEM was aided by Analysis of Moment Structure (AMOS) software, version 23. The study is influenced by the theoretical framework of Equity theory. Findings from the study indicated that, Distributive justiceand Compensation structure were reported to have significant and negative relation with job satisfaction. These results suggest that Government should pay much emphasis to the compensation structure which has to do with their remuneration, allowances and to the larger extent, the welfareof the institutions’ employees. The management of the institutions should be open and fair in duty offerings, equitable chances in carrier development which has to do with seminars, conferences, workshops and more so furtherance of education (higher degrees). In addition, there should be appropriate rules and regulations in order to have fairness of decision making.
CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
Creators: name: Bevis, Neil
name: Hindmarsh, Mark
name: Kunz, Martin
name: Urrestilla, Jon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the first field-theoretic calculations of the contribution made by cosmic strings to the temperature power spectrum of the cosmic microwave background (CMB). Unlike previous work, in which strings were modeled as idealized one-dimensional objects, we evolve the simplest example of an underlying field theory containing local U(1) strings, the Abelian Higgs model. Limitations imposed by finite computational volumes are overcome using the scaling property of string networks and a further extrapolation related to the lessening of the string width in comoving coordinates. The strings and their decay products, which are automatically included in the field theory approach, source metric perturbations via their energy-momentum tensor, the unequal-time correlation functions of which are used as input into the CMB calculation phase. These calculations involve the use of a modified version of CMBEASY, with results provided over the full range of relevant scales. We find that the string tension $μ$ required to normalize to the WMAP 3-year data at multipole $\ell = 10$ is $Gμ= [2.04\pm0.06\textrm{(stat.)}\pm0.12\textrm{(sys.)}] \times 10^{-6}$, where we have quoted statistical and systematic errors separately, and $G$ is Newton's constant. This is a factor 2-3 higher than values in current circulation.
description: 23 pages, 14 figures; further optimized figures for 1Mb size limit, appendix added before submission to journal, matches accepted version
Linear confinement of generalized KG-oscillator with a uniform magnetic field in Kaluza-Klein theory and Aharonov-Bohm effect
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we solve generalized KG-oscillator interacts with a uniform magnetic field in five-dimensional space-time background produced by topological defects under a linear confining potential using the Kaluza-Klein theory. We solve this equation and analyze an analogue of the Aharonov-Bohm effect for bound states. We observe that the energy levels for each radial mode depends on the global parameters characterizing the space-time, the confining potential, and the magnetic field which shows a quantum effect
description: 23 pages, accepted in Scientific Reports journal. arXiv admin note: text overlap with arXiv:2008.04745
Convergence Thresholds of Newton's Method for Monotone Polynomial Equations
Creators: name: Esparza, Javier
name: Kiefer, Stefan
name: Luttenberger, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Information Theory (cs.IT)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Monotone systems of polynomial equations (MSPEs) are systems of fixed-point equations $X_1 = f_1(X_1, ..., X_n),$ $..., X_n = f_n(X_1, ..., X_n)$ where each $f_i$ is a polynomial with positive real coefficients. The question of computing the least non-negative solution of a given MSPE $\vec X = \vec f(\vec X)$ arises naturally in the analysis of stochastic models such as stochastic context-free grammars, probabilistic pushdown automata, and back-button processes. Etessami and Yannakakis have recently adapted Newton's iterative method to MSPEs. In a previous paper we have proved the existence of a threshold $k_{\vec f}$ for strongly connected MSPEs, such that after $k_{\vec f}$ iterations of Newton's method each new iteration computes at least 1 new bit of the solution. However, the proof was purely existential. In this paper we give an upper bound for $k_{\vec f}$ as a function of the minimal component of the least fixed-point $μ\vec f$ of $\vec f(\vec X)$. Using this result we show that $k_{\vec f}$ is at most single exponential resp. linear for strongly connected MSPEs derived from probabilistic pushdown automata resp. from back-button processes. Further, we prove the existence of a threshold for arbitrary MSPEs after which each new iteration computes at least $1/w2^h$ new bits of the solution, where $w$ and $h$ are the width and height of the DAG of strongly connected components.
description: version 2 deposited February 29, after the end of the STACS conference. Two minor mistakes corrected
ELEKTRON TIJORATDA SHARTNOMA TUZISHGA QO'YILADIGAN UMUMIY TALABLAR
Creators: name: Aliyeva, Marjona
Publisher: name: Zenodo
Year: 2024

description: O‘zbekistonda axborot-kommunikatsiya texnologiyalarini joriy etish bo‘yicha amalga oshirilayotgan chora-tadbirlar iqtisodiyot tarmoqlarini raqamlashtirishda, shu jumladan elektron tijoratni rivojlantirishda muayyan natijalarga erishish imkonini berdi. Shunga qaramay, mamlakatda elektron tijoratning to‘laqonli bozorini yaratishga, tovarlar, xizmatlar ishlab chiqaruvchi mahalliy korxonalarning tashqi bozorlarga chiqishiga to‘siq bo‘layotgan qator muammo va kamchiliklar saqlanib qolmoqda.
Phase Transitions in Ultra-Cold Two-Dimensional Bose Gases
Creators: name: Hutchinson, D. A. W.
name: Blakie, P. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We briefly review the theory of Bose-Einstein condensation in the two-dimensional trapped Bose gas and, in particular the relationship to the theory of the homogeneous two-dimensional gas and the Berezinskii-Kosterlitz-Thouless phase. We obtain a phase diagram for the trapped two-dimensional gas, finding a critical temperature above which the free energy of a state with a pair of vortices of opposite circulation is lower than that for a vortex-free Bose-Einstein condensed ground state. We identify three distinct phases which are, in order of increasing temperature, a phase coherent Bose-Einstein condensate, a vortex pair plasma with fluctuating condensate phase and a thermal Bose gas. The thermal activation of vortex-antivortex pair formation is confirmed using finite-temperature classical field simulations.
SHREC 2020 track: 6D Object Pose Estimation
Creators: name: Yuan, Honglin
name: Veltkamp, Remco C.
name: Albanis, Georgios
name: Zioulis, Nikolaos
name: Zarpalas, Dimitrios
name: Daras, Petros
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: 6D pose estimation is crucial for augmented reality, virtual reality, robotic manipulation and visual navigation. However, the problem is challenging due to the variety of objects in the real world. They have varying 3D shape and their appearances in captured images are affected by sensor noise, changing lighting conditions and occlusions between objects. Different pose estimation methods have different strengths and weaknesses, depending on feature representations and scene contents. At the same time, existing 3D datasets that are used for data-driven methods to estimate 6D poses have limited view angles and low resolution. To address these issues, we organize the Shape Retrieval Challenge benchmark on 6D pose estimation and create a physically accurate simulator that is able to generate photo-realistic color-and-depth image pairs with corresponding ground truth 6D poses. From captured color and depth images, we use this simulator to generate a 3D dataset which has 400 photo-realistic synthesized color-and-depth image pairs with various view angles for training, and another 100 captured and synthetic images for testing. Five research groups register in this track and two of them submitted their results. Data-driven methods are the current trend in 6D object pose estimation and our evaluation results show that approaches which fully exploit the color and geometric features are more robust for 6D pose estimation of reflective and texture-less objects and occlusion. This benchmark and comparative evaluation results have the potential to further enrich and boost the research of 6D object pose estimation and its applications.
Conversion of second class constraints by deformation of Lagrangian local symmetries
Creators: name: Deriglazov, A. A.
name: Kuznetsova, Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For a theory with first and second class constraints, we propose a procedure for conversion of second class constraints based on deformation the structure of local symmetries of the Lagrangian formulation. It does not require extension or reduction of configuration space of the theory. We give examples in which the initial formulation implies a non linear realization of some global symmetries, therefore is not convenient. The conversion reveals hidden symmetry presented in the theory. The extra gauge freedom of conversed version is used to search for a parameterization which linearizes the equations of motion. We apply the above procedure to membrane theory (in the formulation with world-volume metric). In the resulting version, all the metric components are gauge degrees of freedom. The above procedure works also in a theory with only second class constraints presented. As an examples, we discuss arbitrary dynamical system of classical mechanics subject to kinematic constraints, O(N)-invariant nonlinear sigma-model, and the theory of massive vector field with Maxwell-Proca Lagrangian.
description: 23 pages, misprints corrected. Slightly compactified version is published in Phys. Lett. B 646 (2007) 47
Microwave photonic crystals as an experimental realization of a combined honeycomb-kagome lattice
Creators: name: Maimaiti, Wulayimu
name: Dietz, Barbara
name: Andreanov, Alexei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In 2015 experiments were performed with superconducting microwave photonic crystals emulating artificial graphene B. Dietz, T. Klaus, M. Miski-Oglu, and A. Richter, Phys. Rev. B 91, 035411 (2015)]. The associated density of states comprises two Dirac points with adjacent bands including van Hove singularities, thus exhibiting the characteristic features originating from the extraordinary electronic band structure of graphene. They are separated by a narrow region of particularly high resonance density corresponding to a nearly flatband in the band structure, which is reminiscent of that of a honome lattice -- a combination of two sublattices: honeycomb and kagome. We demonstrate that, indeed, the density of states, and also the eigenmode properties and the fluctuations in the resonance-frequency spectra are well reproduced by a tight-binding model based on the honome lattice. A good description was achieved by means of the reverse Monte-Carlo approach, thereby confirming our intepretation of the microwave photonic crystal as an experimental realization of a honome lattice and providing an answer to longstanding problem, namely the understanding of the origin of the flatband bordered by two Dirac points, generally observed in microwave photonic crystals of different shapes.
Lower bounds for adaptive linearity tests
Creators: name: Lovett, Shachar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Linearity tests are randomized algorithms which have oracle access to the truth table of some function f, and are supposed to distinguish between linear functions and functions which are far from linear. Linearity tests were first introduced by (Blum, Luby and Rubenfeld, 1993), and were later used in the PCP theorem, among other applications. The quality of a linearity test is described by its correctness c - the probability it accepts linear functions, its soundness s - the probability it accepts functions far from linear, and its query complexity q - the number of queries it makes. Linearity tests were studied in order to decrease the soundness of linearity tests, while keeping the query complexity small (for one reason, to improve PCP constructions). Samorodnitsky and Trevisan (Samorodnitsky and Trevisan 2000) constructed the Complete Graph Test, and prove that no Hyper Graph Test can perform better than the Complete Graph Test. Later in (Samorodnitsky and Trevisan 2006) they prove, among other results, that no non-adaptive linearity test can perform better than the Complete Graph Test. Their proof uses the algebraic machinery of the Gowers Norm. A result by (Ben-Sasson, Harsha and Raskhodnikova 2005) allows to generalize this lower bound also to adaptive linearity tests. We also prove the same optimal lower bound for adaptive linearity test, but our proof technique is arguably simpler and more direct than the one used in (Samorodnitsky and Trevisan 2006). We also study, like (Samorodnitsky and Trevisan 2006), the behavior of linearity tests on quadratic functions. However, instead of analyzing the Gowers Norm of certain functions, we provide a more direct combinatorial proof, studying the behavior of linearity tests on random quadratic functions...
Guides within the circle : aboriginal counsellors’ experiences with aboriginal families affected by fetal alcohol syndrome
Creators: name: Robert, Renee
Publisher: name: University of British Columbia
Year: 2009

description: This research explores the experiences of six Aboriginal counsellors who provide services to Aboriginal families affected by Fetal Alcohol Syndrome. The focus of this research is on the experience and skill which First Nations counsellors employ with Aboriginal families affected by the disease. As well, literature on Fetal Alcohol Syndrome and counsellors' prevention and intervention strategies are explored. The current F.A.S. literature and Canadian Aboriginal history explored in the literature review roots the counsellors' present day experiences in the "Constructions" chapter. Within this qualitative research project, transcribed in-depth interviews of six Aboriginal counsellors' experiential knowledge were explored through the use of narrative analysis techniques. Analysis of the data revealed various themes. The themes indicated that Aboriginal counsellors' concerns regarding F.A.S. included: Aboriginal identity (for themselves and their clients); counselling work issues; as well as acknowledgement of the strengths and weaknesses in agencies and professional practice that currently influence Aboriginal families affected by F.A.S. There was also a theme regarding emotions and feelings running throughout all the interviews. The themes reveal that the experience and perspective of Aboriginal counsellors is unique and valuable. The thesis concludes with recommendations about treatment offered to families affected by Fetal Alcohol Syndrome.