cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A survey and comparison of various models of gravitational dynamical friction
Creators: name: Elson, Rebecca
Publisher: name: University of British Columbia
Year: 2010

description: Under certain circumstances, a massive object travelling through a medium may experience a net average deceleration due to the gravitational interaction between it and the medium. This slowing down effect is called dynamical friction. There are a variety of ways in which dynamical friction may be modeled, depending primarily on the nature of the medium, and on what approximations are deemed to be reasonable. This thesis is devoted to reviewing the various models, with an emphasis on the assumptions underlying each, to pinpointing the source of any discrepancies between the models, and to assessing the validity of each. For this purpose the models are grouped into two categories. The first comprises those in which the medium consists of dust or gas. The models in the second describe the interaction between a test object and a medium consisting of other objects of its own mass. These latter are of two general types: those which employ the two-body approximation, and those which describe the interaction in terms of a stochastically fluctuating force arising from the varying distribution of field objects surrounding the test object. The models lead to three different expressions for the dynamical friction experienced by the object: on proportional to TlogX (X is the distance from the object), one proportional to TlogvT (v is the average velocity of the members of the system), and one finite one proportional to TlogD[sub=o], (D[sub=o] is the mean inter-object spacing). It is argued that the TlogD[sub=o] result is based on an analysis which does not take into account the long range nature of gravitational forces. The TlogX models rely on the behaviour of the medium being stationary, but it is demonstrated that it takes an infinite amount of time to establish such behaviour, so these models are not strictly applicable to any real situation.
Superconductivity in disordered locally noncentrosymmetric materials: an application to CeRh$_2$As$_2$
Creators: name: Möckli, David
name: Ramires, Aline
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Layered three-dimensional centrosymmetric crystals can exhibit characteristics of noncentrosymmetric materials. This happens when each individual layer alone lacks inversion, but, when combined, inversion symmetry is restored; hence the designation: locally noncentrosymmertic superconductors (LNCSs). In LNCSs, the effects of impurities and subdominant magnetic field induced pairing channels remain unexplored. Using a minimal model, we examine all pairing channels and show that there is always a subdominant superconducting instability that is favored at high magnetic fields, which can substantially alter the magnetic field -- temperature phase diagram. Also, we find that the phase diagram responds to disorder in a non-monotonic way, which can be subjected to experimental verification. We apply these ideas to the recently unveiled two-phase superconducting phase diagram of CeRh$_2$As$_2$. We identify the two phases as singlet-triplet mixed even- and odd-parity states at low and a high fields, respectively. Furthermore, we predict the presence of two superconducting phases also for in-plane magnetic fields in cleaner samples, since a high-field phase could have been so far hindered by impurity effects.
description: 19 pages, 10 figures
Make yourself discoverable
Creators: name: Garrido, Nuno Domingos
Publisher: name: Motricidade
Year: 2018

description: As 2017 is ending evolution does not stop, and publishing systems are getting along with this evolvement, since the “publish or perish” dictum is nowadays a way of living among the academy. In this way, in this competitive context, one must keep the publication records updated and, most of all, visible, easy to find, or discoverable.

Some questions arise related to this topic: how can publishers help to connect individuals with their contributions? How can publishers make the publishing process easier for the authors, editors, and reviewers? How can publishers improve discoverability?
description: Motricidade, Vol 13 No 4 (2017)
4-year Longitudinal Study of the Assessment of Body Posture, Back Pain, Postural and Life Habits of Schoolchildren
Creators: name: Da Rosa, Bruna Nichele
name: Furlanetto, Tássia Silveira
name: Noll, Matias
name: Sedrez, Juliana Adami
name: Schmit, Emanuelle Francine Detogni
name: Candotti, Cláudia Tarragô
Publisher: name: Motricidade
Year: 2018

description: The aim of this study was to evaluate the behaviour of postural variables and the associated factors, like back pain and life habits, in schoolchildren during a period of four years. Forty-two school children underwent a postural assessment using Digital Image-Based Postural Assessment software. They also answered the self-administered questionnaire titled, “Back Pain and Body Posture Evaluation Instrument” to evaluate their back pain and life habits. We observed a significant trend of forward head, thoracic hyper kyphosis, and lumbar hyper lordosis in the entire group, as well as a trend of cervical rectification in girls. Both boys and girls presented a constant frequency in back pain, but girls presented higher prevalence along the years. We found a high prevalence of poor sitting posture in male (between 72.2-89.5%) and female (between 73.3-100%). We also found that girls had poor posture due to the way they carried their school supplies. However, occurred a decrease of time spent in front of television for male (from 87% to 10.5%) and female (from 93.3% to 0%). Significant changes occurred in analysed variables over evaluation period.
description: Motricidade, Vol 13 No 4 (2017)
Spherically symmetric ADM gravity with variable G and Lambda(c)
Creators: name: Esposito, Giampiero
name: Rubano, Claudio
name: Scudellaro, Paolo
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper investigates the Arnowitt--Deser--Misner (hereafter ADM) form of spherically symmetric gravity with variable Newton parameter G and cosmological term Lambda(c). The Newton parameter is here treated as a dynamical variable, rather than being merely an external parameter as in previous work on closely related topics. The resulting Hamilton equations are obtained; interestingly, a static solution exists, that reduces to Schwarzschild geometry in the limit of constant G, describing a Newton parameter ruled by a nonlinear differential equation in the radial variable r. A remarkable limiting case is the one for which the Newton parameter obeys an almost linear growth law at large r. An exact solution for G as a function of r is also obtained in the case of vanishing cosmological constant. Some observational implications of these solutions are obtained and briefly discussed.
description: 16 pages, 2 figures. The presentation has been improved in all sections
Integration of the Pion-Beam Tracker into the HADES DAQ
Creators: name: Fabbietti, L.
name: Lalik, R.
name: Louis, P.
name: Maier, L.
name: Michel, J.
name: Pietraszko, J.
name: Schmitt, T.
name: Traxler, M.
name: Wirth, J.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Prevalence of Anxiety, Depression and Stress Symptoms and its Association with Neck/Shoulder Pain in Adolescents Athletes
Creators: name: Silva, Hítalo Andrade
name: Passos, Muana Pereira
name: Oliveira, Valéria Alves
name: Silva, Yslainy Araújo
name: Pitangui, Ana Carolina Rodarti
name: Araújo, Rodrigo Cappato
Publisher: name: Motricidade
Year: 2018

description: Psychological distress is among the main causes of the onset or worsening of pain symptoms in young sports people. The increasing participation of adolescents in various sports increases the need to verify the prevalence and association of these affective disorders such as anxiety, stress and depression with pain in the shoulder girdle and in the cervical region that are typical in sportspeople who use more frequently the upper limbs. The sample (n = 310; 14.16±2.12 years). Corlett's body diagram and the Brazilian short version of the anxiety, depression and stress scale (DASS-21) were used. Independent t-tests, chi-square and multiple logistic regression were used. The girls had a higher prevalence of anxiety/stress (62%, p = 0.02). The variables associated with anxiety/stress were female (OR = 2.16), aged 15 to 19 years (OR = 2.39) and individual modality (OR = 1.88). The variables associated with depression were age 15 to 19 years (OR = 1.74), individual modality (OR = 1.84) and pain in the shoulder girdle and cervical region (OR = 2.33).
description: Motricidade, Vol 13 No 4 (2017)
Figshare for Institutions and Elsevier Pure Integration: A case study from the University of Amsterdam (UvA) and Amsterdam University of Applied Sciences (AUAS)
Creators: name: Uittenbogaard, Matthieu
name: Hardeman, Megan
Publisher: name: Figshare
Year: 2019
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: This case study outlines the first one-way connection between the University of Amsterdam and Amsterdam University of Applied Sciences's instance of Elsevier Pure, a current research information system (CRIS), and their research data repository, powered by Figshare for Institutions.
Stochastic resonance in soft matter systems: combined effects of static and dynamic disorder
Creators: name: Perc, Matjaz
name: Gosak, Marko
name: Kralj, Samo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We study the impact of static and dynamic disorder on the phenomenon of stochastic resonance (SR) in a representative soft matter system. Due to their extreme susceptibility to weak perturbations soft matter systems appear to be excellent candidates for the observation of SR. Indeed, we derive generic SR equations from a polymer stabilized ferroelectric liquid crystal (LC) cell, which is a typical soft matter representative constituting one of the basic components in several electro-optic applications. We generalize these equations further in order to study an even broader class of qualitatively different systems, especially disclosing the influence of different types of static disorder and interaction ranges amongst LC molecules on the SR response. We determine the required conditions for the observation of SR in the examined system, and moreover, reveal that a random field type static disorder yields qualitatively different responses with respect to random dilution, random bond and spin glass universality classes. In particular, while the latter three decrease the level of dynamic disorder (Gaussian noise) warranting the optimal response, the former evokes exactly the opposite effect, hence increasing the optimal noise level that is needed to resonantly fine-tune the system's response in accordance with the weak deterministic electric field. These observations are shown to be independent of the system size and range of interactions, thus implying their general validity and potentially wide applicability also within other similar settings. We argue that soft matter systems might be particularly adequate as a base for different SR-based sensitive detectors and thus potent candidates for additional theoretical as well as experimental research in the presently outlined direction.
description: 11 two-column pages, 6 figures; accepted for publication in Soft Matter
Third Time's Not a Charm: Exploiting SNMPv3 for Router Fingerprinting
Creators: name: Albakour, Taha
name: Gasser, Oliver
name: Beverly, Robert
name: Smaragdakis, Georgios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we show that adoption of the SNMPv3 network management protocol standard offers a unique -- but likely unintended -- opportunity for remotely fingerprinting network infrastructure in the wild. Specifically, by sending unsolicited and unauthenticated SNMPv3 requests, we obtain detailed information about the configuration and status of network devices including vendor, uptime, and the number of restarts. More importantly, the reply contains a persistent and strong identifier that allows for lightweight Internet-scale alias resolution and dual-stack association. By launching active Internet-wide SNMPv3 scan campaigns, we show that our technique can fingerprint more than 4.6 million devices of which around 350k are network routers. Not only is our technique lightweight and accurate, it is complementary to existing alias resolution, dual-stack inference, and device fingerprinting approaches. Our analysis not only provides fresh insights into the router deployment strategies of network operators worldwide, but also highlights potential vulnerabilities of SNMPv3 as currently deployed.
description: Visit https://snmpv3.io for up-to-date SNMPv3 measurement results
ҚИШЛОҚ ХЎЖАЛИГИ МАҲСУЛОТЛРИНИ ҚУРИТИШДА ҚУЁШ ЭНЕРГИЯСИДАН ФОЙДАЛАНИБ ГЕЛИОКУРИТГИЧ ҚУРИЛМАСИНИНГ  ТЕХНОЛОГИК ИМКОНИЯТЛАРИ.
Creators: name: Axmedov, Saidolim
name: Alimov, Abdulaziz
Publisher: name: Zenodo
Year: 2023

description: Қишлоқ хўжалиги маҳсулотлрини қуритишда доривор ўсимиклaр, узум, тут ўрик, олма, қовун, кўкат энергиятежамкор ва экологик тоза технология яьни куёш энергиясидан фойдаланиш. Куёш курилмаларида куритилган махсулотларнинг сифати очик майдонларда куритилган махсулотларнинг сифатидан яхши, яъни куритилган махсулотлар тарибида витамин С купрок булиб, куритилган махсулотлар тоза булади.
Non-existence of geometrodynamical analog to electric charge
Creators: name: Davenport, Michael Richard
Publisher: name: University of British Columbia
Year: 2010

description: A "Geometrodynamical Analog to Electric Charge" (or "p-charge") is defined (as in the earlier paper by Unruh, [Gen. Rel. and Grav., 2, (1971), pp 27-33 ] to be the period on a p-cycle (p = 1, 2, or 3) of a p-form which is constructed out of only the Riemann tensor or its derivatives. A previously-unpublished proof by Unruh is briefly summarized which proves that no non-zero p-charges can exist on a completely unrestricted metric field. The metric field is then constrained to obey Einstein's equations for empty space, and sets of linearly-independent, purely-gravitational p-forms are analyzed to determine if p-charges can be defined under these conditions. A scheme is developed, based on the spin-tensor representation of the gravitational field, to generate complete sets of such p-forms, arid calculate their derivatives, with a symbolic-manipulation computer program. It is shown that no gravitational p-forms that are linear combinations of less than five Riemann tensors and less than nine derivatives will result in p-charges.
A Gemini-NIFS view of the merger remnant NGC 34
Creators: name: Motter, J. C.
name: Riffel, R.
name: Ricci, T. V.
name: Riffel, R. A.
name: Storchi-Bergmann, T.
name: Pastoriza, M. G.
name: Rodriguez-Ardila, A.
name: Ruschel-Dutra, D.
name: Dahmer-Hahn, L. G.
name: Dametto, N. Z.
name: Diniz, M. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The merger remnant NGC 34 is a local luminous infrared galaxy (LIRG) hosting a nuclear starburst and a hard X-ray source associated with a putative, obscured Seyfert~2 nucleus. In this work, we use adaptive optics assisted near infrared (NIR) integral field unit observations of this galaxy to map the distribution and kinematics of the ionized and molecular gas in its inner $\mathrm{1.2\,kpc \times 1.2\,kpc}$, with a spatial resolution of 70~pc. The molecular and ionized gas kinematics is consistent with a disc with projected major axis along a mean PA~=~$\mathrm{-9^{\circ}.2 \pm 0^{\circ}.9}$. Our main findings are that NGC~34 hosts an AGN and that the nuclear starburst is distributed in a circumnuclear star-formation ring with inner and outer radii of $\approx$~60 and 180~pc, respectively, as revealed by maps of the $\mathrm{[Fe II] / Paβ}$ and $\mathrm{H_{2} / Brγ}$ emission-line ratios, and corroborated by PCA Tomography analysis. The spatially resolved NIR diagnostic diagram of NGC~34 also identifies a circumnuclear structure dominated by processes related to the stellar radiation field and a nuclear region where $[Fe II]$ and H$_2$ emissions are enhanced relative to the hydrogen recombination lines. We estimate that the nuclear X-ray source can account for the central H$_2$ enhancement and conclude that $[Fe II]$ and H$_2$ emissions are due to a combination of photo-ionization by young stars, excitation by X-rays produced by the AGN and shocks. These emission lines show nuclear, broad, blue-shifted components that can be interpreted as nuclear outflows driven by the AGN.
description: 21 pages, 14 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal
Correlated radio--X-ray variability of Galactic Black Holes: A radio--X-ray flare in Cygnus X-1
Creators: name: Wilms, Joern
name: Pottschmidt, Katja
name: Pooley, Guy G.
name: Markoff, Sera
name: Nowak, Michael A.
name: Kreykenbohm, Ingo
name: Rothschild, Richard E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the first detection of a quasi-simultaneous radio-X-ray flare of Cygnus X-1. The detection was made on 2005 April 16 with pointed observations by the Rossi X-ray Timing Explorer and the Ryle telescope, during a phase where the black hole candidate was close to a transition from the its soft into its hard state. The radio flare lagged the X-rays by approximately 7 minutes, peaking at 3:20 hours barycentric time (TDB 2453476.63864). We discuss this lag in the context of models explaining such flaring events as the ejection of electron bubbles emitting synchrotron radiation.
description: 4 pages, 4 figures
การประมาณอายุของคราบเลือดด้วยเทคนิคโครมาโตกราฟีของเหลวสมรรถนะสูง (HPLC)
Creators: name: กฤษณะ พวงระย้า
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: นิติวิทยาศาสตร์
อายุของคราบเลือด
โปรตีนในเลือด

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 1-10
การวิเคราะห์คุณภาพและเบตาเลนจากเสมา
Creators: name: บุษราคัม สิงห์ชัย
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: เสมา
การวิเคราะห์คุณภาพ
เบตาเลน

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 11-16
title: Enhancing multiple-choice question answering with causal knowledge
Creators: name: Dalal, Dhairya
name: Arcan, Mihael
name: Buitelaar, Paul
Publisher: name: Association for Computational Linguistics
Year: 2021
Subjects: subject: Multiple-Choice Question Answering
subject: Causal Knowledge
subject: Data science

description: The task of causal question answering aims to reason about causes and effects over a provided real or hypothetical premise. Recent approaches have converged on using transformer-based language models to solve question answering tasks. However, pretrained language models often struggle when external knowledge is not present in the premise or when additional context is required to answer the question. To the best of our knowledge, no prior work has explored the efficacy of augmenting pretrained language models with external causal knowledge for multiple-choice causal question answering. In this paper, we present novel strategies for the representation of causal knowledge. Our empirical results demonstrate the efficacy of augmenting pretrained models with external causal knowledge. We show improved performance on the COPA (Choice of Plausible Alternatives) and WIQA (What If Reasoning Over Procedural Text) benchmark tasks. On the WIQA benchmark, our approach is competitive with the state-of-the-art and exceeds it within the evaluation subcategories of In-Paragraph and Out-of-Paragraph perturbations.
Occultation observation to probe the turbulence scale size in the plasma tail of comet Schwassmann-Wachmann 3-B
Creators: name: Roy, Nirupam
name: Manoharan, P. K.
name: Chakraborty, Pavan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the occultation observation of compact radio source B0019-000 through the plasma tail of comet Schwassmann-Wachmann 3-B. The observation was made with the Ooty Radio Telescope at 326.5 MHz on 2006 May 26, when the plasma tail of the comet was in front of this source. The scintillation was found to be increased significantly for the target source compared to that of a control source. The intensity fluctuation power spectra show both steepening at high spatial scales and excess power at low spatial scales. This observation can be attributed to the turbulence in the comet plasma tail. A two-regime plasma turbulence can explain the time-evolution of the power spectrum during the occultation observation.
description: 4 pages, 3 tables, 4 figures. Accepted for publication in ApJ Letters. Corrected minor typos. The definitive version is available at http://www.journals.uchicago.edu/
ผลการเสริมสมุนไพรตำรับต้มยำในอาหารต่อคุณภาพเนื้อไก่ลูกผสมพื้นเมืองทางการค้า
Creators: name: มหิศร ประภาสะโนบล
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: สมุนไพรตำรับต้มยำ
คุณภาพเนื้อ
ไก่เนื้อลูกผสมพื้นเมือง

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 17-27
Correlation decay and recurrence estimates for some robust nonuniformly hyperbolic maps
Creators: name: Varandas, Paulo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A25; 37B20; 37D20

description: We study decay of correlations, the asymptotic distribution of hitting times and fluctuations of the return times for a robust class of multidimensional non-uniformly hyperbolic transformations. Oliveira and Viana [15] proved that there is a unique equilibrium state for a large class of non- uniformly expanding transformations and Holder continuous potentials with small variation. For an open class of potentials with small variation, we prove quasi-compactness of the Ruelle-Perron-Frobenius operator in a space $V_θ$ of functions with essential bounded variation that strictly contain Holder continuous observables. We deduce that the equilibrium states have exponential decay of correlations. Furthermore, we prove exponential asymptotic distribu- tion of hitting times and log-normal fluctuations of the return times around the average given by the metric entropy.
description: 24 pages
title: Lexical sense alignment using weighted bipartite b-matching
Creators: name: Ahmadi, Sina
name: Arcan, Mihael
name: McCrae, John
Publisher: name: NUI Galway
Year: 2019
Subjects: subject: Lexical sense alignment
subject: resource alignment
subject: e-lexicography
subject: graph matching

description: In this study, we present a similarity-based approach for lexical sense alignment in WordNet and Wiktionary with a focus on the polysemous items. Our approach relies on semantic textual similarity using features such as string distance metrics and word embeddings, and a graph matching algorithm. Transforming the alignment problem into a bipartite graph matching enables us to apply graph matching algorithms, in particular, weighted bipartite b-matching (WBbM).
An Analytic Solution to the Kozai-Lidov Evolution Equations
Creators: name: Lubow, Stephen H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A test particle in a noncoplanar orbit about a member of a binary system can undergo Kozai-Lidov oscillations in which tilt and eccentricity are exchanged. An initially circular highly inclined particle orbit can reach high eccentricity. We consider the nonlinear secular evolution equations previously obtained in the quadrupole approximation. For the important case that the initial eccentricity of the particle orbit is zero, we derive an analytic solution for the particle orbital elements as a function of time that is exact within the quadrupole approximation. The solution involves only simple trigonometric and hyperbolic functions. It simplifies in the case that the initial particle orbit is close to being perpendicular to the binary orbital plane. The solution also provides an accurate description of particle orbits with nonzero but sufficiently small initial eccentricity. It is accurate over a range of initial eccentricity that broadens at higher initial inclinations. In the case of an initial inclination of pi/3, an error of 1% at maximum eccentricity occurs for initial eccentricities of about 0.1.
description: To be published in MNRAS, 8 pages, 7 figures
Uncertainty Estimation and Out-of-Distribution Detection for Counterfactual Explanations: Pitfalls and Solutions
Creators: name: Delaney, Eoin
name: Greene, Derek
name: Keane, Mark T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Whilst an abundance of techniques have recently been proposed to generate counterfactual explanations for the predictions of opaque black-box systems, markedly less attention has been paid to exploring the uncertainty of these generated explanations. This becomes a critical issue in high-stakes scenarios, where uncertain and misleading explanations could have dire consequences (e.g., medical diagnosis and treatment planning). Moreover, it is often difficult to determine if the generated explanations are well grounded in the training data and sensitive to distributional shifts. This paper proposes several practical solutions that can be leveraged to solve these problems by establishing novel connections with other research works in explainability (e.g., trust scores) and uncertainty estimation (e.g., Monte Carlo Dropout). Two experiments demonstrate the utility of our proposed solutions.
การประเมินความสัมพันธ์ของมลพิษทางอากาศบนถนนหลวงรอบมหาวิทยาลัยมหิดล ศาลายา
Creators: name: ต้องชนะ สกุลเกียรติปัญญา
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: ค่าดัชนีคุณภาพอากาศ
ฝุ่นละอองขนาดเล็กไม่เกิน10ไมครอน
แก๊สมลพิษทางอากาศ

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 28-41
Chronic effects of exhausting exercise and overtraining on the immune response: Th1 and Th2 profile
Creators: name: Guimarães, Thiago Teixeira
name: Terra, Rodrigo
name: Dutra, Patrícia Maria Lourenço
Publisher: name: Motricidade
Year: 2017

description: Although physical inactivity figures as one of the main causes attributed to mortality, the damage caused by excessive exercise is also a reality. Professional athletes, amateur or uncompetitive modalities beneficiaries are often affected by deleterious conditions resulting from excessive exercise, such as neurological, endocrine and immune origin. The thin line between losses and benefits of successive fatiguing sessions effort depends on the understanding of concepts and methodological training principles. Exercise may have a paradoxical relationship and its consistent prescription in terms of public health depends on a better understanding of their cellular mechanisms. In this sense, the purpose of this review was to explore a promising topic in sports science, able to contribute to elucidate such mechanisms: Th1 and Th2 profile of the immune response related with chronic exhausting exercise and overtraining.
description: Motricidade, Vol 13 No 3 (2017)
การวิเคราะห์ปัจจัยด้านความปลอดภัยในการให้บริการระบบเครือข่ายคอมพิวเตอร์สำหรับหน่วยงาน
Creators: name: นพดล  สายคติกรณ์
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: แบบจำลองสมการเชิงโครงสร้าง
ระบบความปลอดภัยข้อมูล
ระบบเครือข่ายคอมพิวเตอร์

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 42-51
Dispersionless limit of the noncommutative potential KP hierarchy and solutions of the pseudodual chiral model in 2+1 dimensions
Creators: name: Dimakis, Aristophanes
name: Muller-Hoissen, Folkert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The usual dispersionless limit of the KP hierarchy does not work in the case where the dependent variable has values in a noncommutative (e.g. matrix) algebra. Passing over to the potential KP hierarchy, there is a corresponding scaling limit in the noncommutative case, which turns out to be the hierarchy of a `pseudodual chiral model' in 2+1 dimensions (`pseudodual' to a hierarchy extending Ward's (modified) integrable chiral model). Applying the scaling procedure to a method generating exact solutions of a matrix (potential) KP hierarchy from solutions of a matrix linear heat hierarchy, leads to a corresponding method that generates exact solutions of the matrix dispersionless potential KP hierarchy, i.e. the pseudodual chiral model hierarchy. We use this result to construct classes of exact solutions of the su(m) pseudodual chiral model in 2+1 dimensions, including various multiple lump configurations.
description: 37 pages, 10 figures, 2nd version: some extensions (Fig 3, Appendix A, additional references), 3rd version: some minor changes, additional references
An Information-Geometric Reconstruction of Quantum Theory, I: The Abstract Quantum Formalism
Creators: name: Goyal, Philip
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper and a companion paper, we show how the framework of information geometry, a geometry of discrete probability distributions, can form the basis of a derivation of the quantum formalism. The derivation rests upon a few elementary features of quantum phenomena, such as the statistical nature of measurements, complementarity, and global gauge invariance. It is shown that these features can be traced to experimental observations characteristic of quantum phenomena and to general theoretical principles, and thus can reasonably be taken as a starting point of the derivation. When appropriately formulated within an information geometric framework, these features lead to (i) the abstract quantum formalism for finite-dimensional quantum systems, (ii) the result of Wigner's theorem, and (iii) the fundamental correspondence rules of quantum theory, such as the canonical commutation relationships. The formalism also comes naturally equipped with a metric (and associated measure) over the space of pure states which is unitarily- and anti-unitarily invariant. The derivation suggests that the information geometric framework is directly or indirectly responsible for many of the central structural features of the quantum formalism, such as the importance of square-roots of probability and the occurrence of sinusoidal functions of phases in a pure quantum state. Global gauge invariance is seen to play a crucial role in the emergence of the formalism in its complex form.
description: 26 pages
การประเมินผลสัมฤทธิ์การดำเนินงานด้านไอทีในองค์การบริหารส่วนตำบล โดยใช้กรอบการดำเนินงานโคบิต 5
Creators: name: จิรศักดิ์ ศิริรัตนพล
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: การกำกับดูแลทางด้านไอที
โคบิต5
องค์การบริหารส่วนตำบล
การประเมินผลสัมฤทธิ์ด้านไอที

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 52-65
Prevalence of Developmental Coordination Disorder signs in children 5 to 14 years in São Carlos
Creators: name: Della Barba, Patricia Carla De Souza
name: Luiz, Erika Marques
name: Pinheiro, Raquel Cristina
name: Lourenço, Gerusa Ferreira
Publisher: name: Motricidade
Year: 2017

description: This study aimed to identify the prevalence of Developmental Coordination Disorder (DCD) in children aged 5-14 years, enrolled in public preschools and elementary schools in São Carlos - SP. There were 130 participating families. Instruments were: Developmental Coordination Disorder Questionnaire – Brazil (DCDQ - Brazil), Brazil criteria and a questionnaire for the characterization of children. The prevalence of DCD found was 30%, which is overestimated when compared to data found in much of the literature, justified by the use of the instrument for detection of the DCD. No significant difference was found between the presence of signs in boys and girls and there was a higher concentration of children with DCD signs on B2, C1 and C2 socioeconomic classes. The prevalence of DCD signs was higher in children over 8 years.
description: Motricidade, Vol 13 No 3 (2017)
Hemodynamic responses to strength exercise with blood flow restriction during different phases of the menstrual cycle
Creators: name: Neto, Gabriel Rodrigues
name: Novaes, Jefferson Silva
name: Júnior, Adenilson Targino De Araújo
name: Silva, Júlio César Gomes
name: Souza, Rodrigo Poderoso
name: Cirilo-Sousa, Maria Socorro
Publisher: name: Motricidade
Year: 2017

description: The present study aimed to determine the influence of low-load (LL) resistance exercise (RE) with blood flow restriction (BFR) on systolic blood pressure (SBP), diastolic blood pressure (DBP), mean blood pressure (MBP), heart rate (HR), double product (DP) and oxygen saturation (SpO2) during the phases of the menstrual cycle (MC). Thirty untrained women were randomly and proportionally divided into three groups: HI = high-intensity exercises (80% of one-repetition maximum (1RM)); LL = low-load exercises (20% of 1RM); and LL+BFR = LL exercises combined with BFR. The exercise sessions were performed during the 3rd-4th days (follicular phase), 16th day (ovulatory phase) and the 24th-26th days (luteal phase) of the MC. Before and immediately after the exercises, SBP, DBP, HR and SpO2 were evaluated. We observed an increase in SBP, HR and DP in the three phases of the MC for all groups (p < 0.05). Groups LL and/or LL+BFR exhibited a greater increase in SBP, DBP, MBP, HR and DP when compared with the HI group (p < 0.05), and in the three groups, SpO2 was not reduced (p > 0.05). There was a significant effect of the MC phases on HR and DP (p < 0.05). We conclude that the three groups exhibited increased SBP, HR and DP; however, SpO2 was not different. Furthermore, groups LL and LL+BFR exhibited greater increases in hemodynamics, and the MC phases seem to influence only HR and DP.
description: Motricidade, Vol 13 No 3 (2017)
Radiative MHD Simulations of Photon Bubbles in Radiation-Supported Magnetized Atmospheres of Neutron Stars with Isotropic Thomson Scattering
Creators: name: Zhang, Lizhong
name: Blaes, Omer
name: Jiang, Yan-Fei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A major uncertainty in the structure and dynamics of magnetized, radiation pressure dominated neutron star accretion columns in X-ray pulsars and pulsating ultraluminous X-ray sources is that they are thought to be subject to the photon bubble instability. We present the results of two dimensional radiation relativistic magnetohydrodynamic simulations of a non-accreting, static atmosphere to study the development of this instability assuming isotropic Thomson scattering in the slow diffusion regime that is relevant to neutron star accretion columns. Photon bubbles generally grow faster toward shorter wavelengths, until a maximum growth rate is achieved at the radiation viscosity length scale, which is generally quite small and requires high numerical resolution to simulate. We confirm the consistency between our simulation results and linear theory in detail, and show that the nonlinear evolution inevitably leads to collapse of the atmosphere with the higher resolution simulation collapsing faster due to the presence of shorter length scale nonlinear structures. At least in static atmospheres with horizontally periodic boundary conditions, this resolution dependence may make simulations of the nonlinear dynamics of photon bubble instability in neutron star accretion columns challenging. It remains to be seen whether these difficulties will persist upon inclusion of an accretion flow through the top and magnetically-confined horizontal boundaries through which photons can escape. Our results here provide a foundation for such future work.
description: 21 pages, 18 figures and 3 tables, Published in MNRAS
Degrees of freedom of tongue movements in speech may be constrained by biomechanics
Creators: name: Perrier, Pascal
name: Perkell, Joseph
name: Payan, Yohan
name: Zandipour, Majid
name: Guenther, Franck
name: Khalighi, Ali
Publisher: name: arXiv
Year: 2007
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: A number of studies carried out on different languages have found that tongue movements in speech are made along two primary degrees of freedom (d.f.s): the high-front to low-back axis and the high-back to low-front axis. We explore the hypothesis that these two main d.f.s could find their origins in the physical properties of the vocal tract. A large set of tongue shapes was generated with a biomechanical tongue model using a Monte-Carlo method to thoroughly sample the muscle control space. The resulting shapes were analyzed with PCA. The first two factors explain 84% of the variance, and they are similar to the two experimentally observed d.f.s. This finding suggests that the d.f.s. are not speech-specific, and that speech takes advantage of biomechanically based tongue properties to form different sounds.
การพัฒนาเว็บแอปพลิเคชันการจัดการเวชภัณฑ์และวัสดุการแพทย์ : กรณีศึกษา แอปพลิเคชันเอ็มสต๊อก (MStock)
Creators: name: มารุต ภู่พะเนียด
Publisher: name: มหาวิทยาลัยราชภัฏเพชรบุรี
Year: 2018
Subjects: เว็บแอปพลิเคชั่น
การจัดการ
ยา
วัสดุการแพทย์

description: วารสารวิทยาศาสตร์แห่งมหาวิทยาลัยราชภัฏเพชรบุรี, 15, 1, 66-76
Fitness, cardiovascular and metabolic risk factors: A correlational study
Creators: name: Batalau, Rui Miguel
name: Cruz, Joana Mendes
name: Gonçalves, Ricardo Carmo
name: Santos, Magda Almeida
name: Leal, João
name: Palmeira, António Labisa
Publisher: name: Motricidade
Year: 2017

description: This study aimed to verify the relationship between anthropometric measures (AM), blood pressure (BP) and cardiorespiratory fitness (CRF), physical activity (PA), sedentary behaviour (SB), predicted BMI z-score, waist circumference (WC) and waist-to-height ratio (WHtR) variance. A total of 245 children (8.90 ± .80years-old) were recruited from a Portuguese school. WHtR was classified according the reference ≥ 0.5. WC was measured above iliac crest. BP was assessed using a sphygmomanometer, and CRF using 20-m run test. PA and SB were assessed by accelerometers (Actigraph GT3x) and by questionnaire. Participants did not meet recommendations on PA. CRF and vigorous PA (VPA) were inversely correlated with AM. Moderate and vigorous PA were positively correlated with CRF. CRF was inversely correlated with systolic and diastolic BP. CRF and PA explained BMI z-score variance. WC and WHtR variance was predicted by CRF. These results emphasize the importance of international recommendations for PA with the purpose of developing CRF. A new emphasis should be given to CRF and interdisciplinary approaches in international recommendations. This should provide new health implications for primary care providers and school services.
description: Motricidade, Vol 13 No 3 (2017)
Asymmetric HI 21 cm lines of fast radio burst hosts: connection with galaxy interaction
Creators: name: Michałowski, Michał J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Fast radio bursts (FRBs) are enigmatic transients with very short radio emission. Their nature is still widely debated. I provide the first analysis of atomic gas properties of a small sample of FRB hosts to constrain their nature. HI observations exist for NGC 3252, the host of FRB 181030A, M81, the host of FRB 200120E, and the Milky Way, the host of FRB 200428. I report three observables: i) all three FRB hosts are interacting galaxies; ii) the Hi spectra of both FRB hosts with such data available are highly asymmetric, several standard deviations above the general population of galaxies; iii) two FRB hosts have normal atomic gas properties and one is strongly deficient in atomic gas. This indicates that nearby and repeating FRBs are connected with a recent enhancement of star formation due to interaction. This supports fast FRB channels, for example a massive star with a short delay time so that interaction signatures giving rise to the birth of the progenitor are still visible. Long gamma-ray burst (GRB) and broad-lined type Ic supernova (SN) hosts exhibit much more symmetric spectra, even though they were claimed to experience gas inflow from the intergalactic medium. The difference can be explained by the interactions experienced by FRB hosts being more disruptive than these gas inflows, or by the mass effect, with GRB/SN hosts at lower masses having less organized gas motions, so with HI lines closer to a symmetrical Gaussian. This also suggests that the emission mechanisms of FRBs and GRBs are different.
description: ApJ Letters, in press; 7 pages, 3 figures, 1 table; v2: estimations of statistical significance and uncertainties of the results added
Advances in control of a Pyramid Single Conjugate Adaptive Optics system
Creators: name: Agapito, Guido
name: Rossi, Fabio
name: Plantet, Cedric
name: Puglisi, Alfio
name: Pinna, Enrico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Adaptive optics systems are an essential technology for the modern astronomy for ground based telescopes. One of the most recent revolution in the field is the introduction of the pyramid wavefront sensor. The higher performance of this device is payed with increased complexity in the control. In this work we report about advances in the AO system control obtained with SOULat the Large Binocular Telescope. The first is an improved Tip/Tilt temporal control able to recover the nominal correction even in presence of high temporal frequency resonances. The second one is a modal gain optimization that has been successfully tested on sky for the first time. Pyramid wavefront sensors are the key technology for the first light AO systems of all ELTs and the reported advances can be relevant contributions for such systems.
description: 12 pages, 13 figures. Fixed typos in footnote 2 and in equation 13
Effect of imagery on free throw performance in young basketball players
Creators: name: Fortes, Leonardo De Sousa
name: Carmo, Yuri Andrey Ferreira Do
name: Cruz, Rhayanne Beatriz Dos Santos Félix
name: Lima, Ewerton Thiago Pereira De
name: Mansur, Henrique Novais
Publisher: name: Motricidade
Year: 2017

description: The purpose of the present study was to analyze the effect of imaginary training on the free-throw performance in young basketball players. The sample consisted of 33 volunteers aged between 14 and 15 years, divided randomly into two groups: experimental (EG, n = 16) and control (CG, n = 17) group. Both groups underwent the same physical/technical training plan during eight weeks. The CG watched videos on the history of the Olympic Games, while the EG performed the imaginary training 3 times for week interspersed with the period of 48 hours. Performance in free-throw (hit percentage) was measured before and after 8 weeks. The results presented time (F(2, 31) = 19.65, p = .01) and group (F(2, 31) = 40.09, p = .001) effect. It was identified significant differences in free-throw performance between EG and CG after 8 weeks (F(2, 31) = 43.13, p = .01, d = .5). Thus, it was concluded that imaginary training was efficient to maximize free-throw performance in young basketball players.
description: Motricidade, Vol 13 No 3 (2017)
Quasar clustering at redshift 6
Creators: name: Greiner, J.
name: Bolmer, J.
name: Yates, R. M.
name: Habouzit, M.
name: Banados, E.
name: Afonso, P. M. J.
name: Schady, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Large-scale surveys over the last years have revealed about 300 QSOs at redshift above 6. Follow-up observations identified surprising properties, such as the very high black hole (BH) masses, spatial correlations with surrounding cold gas of the host galaxy, or high CIV-MgII velocity shifts. In particular, the discovery of luminous high-redshift quasars suggests that at least some black holes likely have large masses at birth and grow efficiently. We aim at quantifying quasar pairs at high redshift for a large sample of objects. This provides a new key constraint on a combination of parameters related to the origin and assembly for the most massive black holes: BH formation efficiency and clustering, growth efficiency and relative contribution of BH mergers. We observed 116 spectroscopically confirmed QSOs around redshift 6 with the simultaneous 7-channel imager GROND in order to search for companions. Applying identical colour-colour cuts as for those which led to the spectroscopically confirmed QSO, we perform LePHARE fits to the 26 best QSO pair candidates, and obtained spectroscopic observations for 11 of those. e do not find any QSO pair with a companion brighter than M1450(AB) < -26 mag within our 0.1-3.3 h^-1 cMpc search radius, in contrast to the serendipitous findings in the redshift range 4--5. However, a low fraction of such pairs at this luminosity and redshift is consistent with indications from present-day cosmological-scale galaxy evolution models. In turn, the incidence of L- and T-type brown dwarfs which occupy a similar colour space as z ~ 6 QSOs, is higher than expected, by a factor of 5 and 20, respectively.
description: 20 pages, 18 figures, A&A (accepted)
Contributions of body fat, fat free mass and arm muscle area in athletic performance of wheelchair basketball players
Creators: name: Oliveira, Lúcia
name: Oliveira, Saulo
name: Guimarães, Fernando
name: Costa, Manoel
Publisher: name: Motricidade
Year: 2017

description: The aims of this study were: to verify the relationship (1) and dependency (2) between body fat (BF), fat free mass (FFM) and the arm muscle area (AMA) with athletic performance of wheelchair basketball players. Twenty-two subjects were evaluated according to the following order, in 24-hour intervals: a) anthropometric measurements and the Wingate anaerobic test (day 1); b) assessment of VO2peak and threshold (2); and c) specific tests (3). The results showed satisfactory relationships of AMA with handgrip left (r=.36; p=.08), VO2peak (r=.59; p=.03), medicine ball throwing (r=.54; p=.00), absolute (r=.61; p=.00) and relative anaerobic power (r=.67; p=.00). BF with handgrip left (r= .43; p=.03), medicine ball throwing (r=.50; p=.01), absolute (r=.77; p=.00) and relative (r=.82; p=.00) anaerobic power. And FFM with handgrip (r=.44; p=.03), medicine ball throwing (r=.43; p=.03), absolute (r=.64; p=.00) and relative (r=.69; p= .00) anaerobic power. The regression analyses revealed that only predictive models by AMA presented good determination coefficients to VO2peak (r2=.35; p=.00), medicine ball throwing (r2=.29; p=.00), absolute (r2=.37; p=.00) and relative (r2=.46; p=.00) anaerobic Power. The results indicated the importance to consider some anthropometric measures, in particular muscular tissue, to sport training and athletic performance evaluation of wheelchair basketball players.
description: Motricidade, Vol 13 No 2 (2017)