cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraining the mass of the black hole GX 339-4 using spectro-temporal analysis of multiple outbursts
Creators: name: H., Sreehari
name: Iyer, Nirmal
name: D., Radhika
name: Nandi, Anuj
name: Mandal, Samir
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We carried out spectro-temporal analysis of the archived data from multiple outbursts spanning over the last two decades from the black hole X-ray binary GX 339-4. In this paper, the mass of the compact object in the X-ray binary system GX 339-4 is constrained based on three indirect methods. The first method uses broadband spectral modelling with a two component flow structure of the accretion around the black hole. The broadband data are obtained from {\it RXTE (Rossi X-ray Timing Explorer)} in the range 3.0 to 150.0 keV and from {\it Swift} and {\it NuSTAR (Nuclear Spectroscopic Telescope Array)} simultaneously in the range 0.5 to 79.0 keV. In the second method, we model the time evolution of Quasi-periodic Oscillation (QPO) frequencies, considering it to be the result of an oscillating shock that radially propagates towards or away from the compact object. The third method is based on scaling a mass dependent parameter from an empirical model of the photon index ($Γ$) - QPO ($ν$) correlation. We compare the results at 90 percent confidence from the three methods and summarize the mass estimate of the central object to be in the range $8.28 - 11.89~ M_{\odot}$.
description: 14 pages, 8 figures
Matrix Factor Analysis: From Least Squares to Iterative Projection*
Creators: name: He, Yong
name: Kong, Xinbing
name: Yu, Long
name: Zhang, Xinsheng
name: Zhao, Changwei
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: In this article, we study large-dimensional matrix factor models and estimate the factor loading matrices and factor score matrix by minimizing square loss function. Interestingly, the resultant estimators coincide with the Projected Estimators (PE) in Yu et al. (2022), which was proposed from the perspective of simultaneous reduction of the dimensionality and the magnitudes of the idiosyncratic error matrix. In other word, we provide a least-square interpretation of the PE for the matrix factor model, which parallels to the least-square interpretation of the PCA for the vector factor model. We derive the convergence rates of the theoretical minimizers under sub-Gaussian tails. Considering the robustness to the heavy tails of the idiosyncratic errors, we extend the least squares to minimizing the Huber loss function, which leads to a weighted iterative projection approach to compute and learn the parameters. We also derive the convergence rates of the theoretical minimizers of the Huber loss function under bounded fourth or even (2+ϵ)-th moment of the idiosyncratic errors. We conduct extensive numerical studies to investigate the empirical performance of the proposed Huber estimators relative to the state-of-the-art ones. The Huber estimators perform robustly and much better than existing ones when the data are heavy-tailed, and as a result can be used as a safe replacement in practice. An application to a Fama-French financial portfolio dataset demonstrates the empirical advantage of the Huber estimator.
Bounded Engel elements in residually finite groups
Creators: name: Bastos, Raimundo
name: Silveira, Danilo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: Let $q$ be a prime. Let $G$ be a residually finite group satisfying an identity. Suppose that for every $x \in G$ there exists a $q$-power $m=m(x)$ such that the element $x^m$ is a bounded Engel element. We prove that $G$ is locally virtually nilpotent. Further, let $d,n$ be positive integers and $w$ a non-commutator word. Assume that $G$ is a $d$-generator residually finite group in which all $w$-values are $n$-Engel. We show that the verbal subgroup $w(G)$ has $\{d,n,w\}$-bounded nilpotency class.
description: 9 pages. arXiv admin note: text overlap with arXiv:1505.04468
Matrix Factor Analysis: From Least Squares to Iterative Projection
Creators: name: He, Yong
name: Kong, Xinbing
name: Yu, Long
name: Zhang, Xinsheng
name: Zhao, Changwei
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: In this article, we study large-dimensional matrix factor models and estimate the factor loading matrices and factor score matrix by minimizing square loss function. Interestingly, the resultant estimators coincide with the Projected Estimators (PE) in Yu et al. which was proposed from the perspective of simultaneous reduction of the dimensionality and the magnitudes of the idiosyncratic error matrix. In other word, we provide a least-square interpretation of the PE for the matrix factor model, which parallels to the least-square interpretation of the PCA for the vector factor model. We derive the convergence rates of the theoretical minimizers under sub-Gaussian tails. Considering the robustness to the heavy tails of the idiosyncratic errors, we extend the least squares to minimizing the Huber loss function, which leads to a weighted iterative projection approach to compute and learn the parameters. We also derive the convergence rates of the theoretical minimizers of the Huber loss function under bounded fourth or even (2+ϵ) th moment of the idiosyncratic errors. We conduct extensive numerical studies to investigate the empirical performance of the proposed Huber estimators relative to the state-of-the-art ones. The Huber estimators perform robustly and much better than existing ones when the data are heavy-tailed, and as a result can be used as a safe replacement in practice. An application to a Fama-French financial portfolio dataset demonstrates the empirical advantage of the Huber estimator.
Shape-Memory Polymers in Dentistry: Systematic Review and Patent Landscape Report
Creators: name: Bruni, Alessandro
name: Deregibus, Andrea
name: Castroflorio, Tommaso
name: Serra, Francesca Giulia
Publisher: name: figshare
Year: 2019
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91209 Polymers and Plastics
subject: FOS: Materials engineering
subject: 110599 Dentistry not elsewhere classified
subject: FOS: Clinical medicine

description: ObjectiveTo perform a Systematic Review (SR) of all existing literature and a Patent Landscape Report (PLR) regarding the potential applications of Shape-Memory Polymers (SMPs) in dentistry. Search strategyClinical and Biomedical online databases (Pubmed, Medline/Embase, Scopus, LILACS, Web of Science), Materials Science and Engineering databases (IEEE Explore, Compendexand Proquest), Material Science and Chemical database (Reaxys) so as Patents databases (Questel-Orbit, Espacenet, Patentscope) were consulted as recently as January 2019 to identify all peer-reviewed papers and patents potentially relevant to the review. ResultsAfter duplicate selection and extraction procedures, 6 relevant full-texts articles from the initial 292 and 45 relevant patents from 497 were selected. A Modified CONSORT checklist of 14 items for reporting pre-clinical in-vitro studies was used to rate the methodological quality of the selected papers. The overall quality was judged low. ConclusionsIt was possible to achieve a scientific and technological overview of the use of Shape-Memory Polymers in dentistry. Emphasis is given to the versatility of this class of materials underlining their limitless possibilities. These findings indicate that SMPs are promising materials in dentistry, suggesting the importance of furtherly pursuing this line of research.
The Transition from Inspiral to Plunge for a Compact Body in a Circular Equatorial Orbit Around a Massive, Spinning Black Hole
Creators: name: Ori, Amos
name: Thorne, Kip S.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There are three regimes of gravitational-radiation-reaction-induced inspiral for a compact body with mass mu, in a circular, equatorial orbit around a Kerr black hole with mass M>>mu: (i) The "adiabatic inspiral regime", in which the body gradually descends through a sequence of circular, geodesic orbits. (ii) A "transition regime", near the innermost stable circular orbit (isco). (iii) The "plunge regime", in which the body travels on a geodesic from slightly below the isco into the hole's horizon. This paper gives an analytic treatment of the transition regime and shows that, with some luck, gravitational waves from the transition might be measurable by the space-based LISA mission.
description: 8 Pages and 3 Figures; RevTeX; submitted to Physical Review D
Exploring the role of gut microbiota in migraine risk: a two-sample Mendelian randomization study
Creators: name: Meng, Xiangyue
name: Li, Quan
name: Wang, Delong
name: Li, Jinting
name: Cui, Yang
name: Sun, Zhongren
name: Yin, Hongna
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: The presence of intestinal flora in the gut has been linked to migraines in recent studies, but whether the association is causal or due to bias remains to be clarified. We aimed to explore whether there is a potential causal relationship between gut microbiota and migraine risk with this study. We conducted a two-sample Mendelian randomized analysis study to explore whether gut microbiota has a causal relationship with migraine using publicly available data from large-scale genome-wide association studies. The inverse variance weighting was used as the main method, and weighted median and MR-Egger were used as supplementary methods for causal inference. Sensitivity analyses, including leave-one-out analysis, Cochran Q test, and MR-Egger intercept test, were used to verify the robustness of the results. After rigorous quality control of the results, we identified that genetic predisposition towards a higher abundance of genus.Lactobacillus was causally associated with higher of migraine (IVW OR = 1.10, 95% CI = 1.03 − 1.18, p = .004), whereas the higher abundance of family.Prvotellaceae predicted a decreased risk of migraine (IVW OR = 0.89, 95% CI = 0.80 − 0.98, p = .02). Sensitivity analyses indicated the results were not biased by pleiotropy. According to our research, there is evidence showing that gut microbiota may be involved in migraine development, which suggested that a stool examination might be helpful to recognize those with a higher risk of migraine. Further mechanisms remained to be elucidated in future studies.
On the extension of the Obukhov theorem in non-Riemannian gravity I
Creators: name: Scipioni, Roberto
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This is a first paper of a series in which we give some generalizations of the Obukhov theorem in the Tucker-Wang approach to Metric- Affine gravity in which we consider more general actions containing scalar and in general fields which do not depend on the metric or connection.
description: 12 pages, no figures, final version for J. Math. Phys
Study on Reading and Writing Abilities of Thai and Migrant Students on the Use of Phonics Method
Creators: name: Rungarun Rojrattanadamrong Chaisri
Publisher: name: Zenodo
Year: 2021
Subjects: Reading
writing
Thai students
migrant students
phonics method

description: This study examined reading and writing ability of Thai and immigrant students using phonics method. The sample group used in this study consisted of Grade 1 Thai and immigrant students in Wat Sirimongkol School, Samut Sakorn Province. The sampled students were selected by purposive sampling. The research tools used in this study were pretest and post-test reading and writing ability examination forms. The collected data was analyzed using Multivariate analysis of variance or MANOVA. The study found that Grade 1 Thai and migrant students with Phonics training had higher reading and writing ability in the first and second post-tests compared to pre-tests, with statistical significance of .01. Phonics method provides opportunities to practice reading and writing from the beginning to the end, with more chances to rehearse each sound and practice reading and writing, and hence, it has significant positive impact on students learning.
Low Temperature Phase of Asymmetric Spin Glass Model in Two Dimensions
Creators: name: Shirakura, Takayuki
name: Matsubara, Fumitaka
Publisher: name: arXiv
Year: 1997
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate low temperature properties of a random Ising model with $+J$ and $-aJ (a \neq 1)$ bonds in two dimensions using a cluster heat bath method. It is found that the Binder parameters $g_L$ for different sizes of the lattice come together at almost the same temperature implying the occurrence of the spin glass(SG) phase transition. From results of finite size scaling analyses, we suggest that the SG phase really occurs at low temperatures which is characterized by a power law decay of spin correlations.
description: 9 pages, 5 Postscript figures, REVtex
Increasing the transplant dose and repeating faecal microbiota transplantation results in the responses of male patients with IBS reaching those of females
Creators: name: El-Salhy, Magdy
name: Gilja, Odd Helge
name: Hatlebakk, Jan Gunnar
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Faecal microbiota transplantation (FMT) performed with a proper protocol is a safe treatment for IBS that has high efficacy and durable effects. Females have been reported to respond better than males to FMT. The present study aimed at determining whether increasing the transplant dose or repeating FMT improve the responses of males to FMT. This study included 186 IBS patients (131 females and 55 males) who were randomized at a 1:1:1 ratio to receive 90 g of donor faeces once into the large intestine, once into the small intestine or twice into the small intestine. Patients completed five questionnaires that assessed their symptoms and quality of life, and provided faecal samples at baseline and at 3, 6 and 12 months after FMT. The faecal bacterial profile and dysbiosis index were determined using 16S rRNA gene PCR DNA amplification covering variable genes V3–V9. The response rates to FMT at all observation times did not differ significantly between females and males regardless of the transplant administration route or whether it was repeated. Faecal Alistipes levels were higher in females than in males at baseline and increased in both females and males after FMT. In the repeated group, the Alistipes levels did not differ between females and males after FMT. Increasing the transplant dose and repeating FMT results in the responses of male IBS patients to FMT reaching those of females regardless of the administration route. Alistipes spp. levels appear to play a role in this improvement. www.clinicaltrials.gov (NCT04236843).
Equilibrium basal-plane magnetization of superconductive YNi(2)B(2)C - the influence of non-local electrodynamics
Creators: name: Thompson, J. R.
name: Silhanek, A. V.
name: Civale, L.
name: Song, K. J.
name: Tomy, C. V.
name: Paul, D. McK.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: For a single crystal of YNi(2)B(2)C superconductor, the equilibrium magnetization M in the square basal plane has been studied experimentally as a function of temperature and magnetic field. While the magnetization M(H) deviates from conventional London predictions, a recent extension of London theory (to include effects of non-local electrodynamics) describes the experiments accurately. The resulting superconductive parameters are well behaved. These results are compared with corresponding findings for the case with M perpendicular to the basal plane.
description: 7 pages, 5 Postscript Figures, 2 tables
Reliability Assessment of the Digital Relay Protection System
Creators: name: Uspensky, Michael
Publisher: name: Reliability: Theory & Applications
Year: 2019
Subjects: relay protection
digital system
reliability
availability.

description: The quantitative assessment attempt of reliability indicators for the specific digital structure of the relay protection system by analogy with an assessment of similar digital systems in other industries is given in this work. The reliability models of system components are provided. The calculation sequence is shown. Calculation results give an optimistic evaluation of such protection creation and indicate the influence of the number of autonomous protection blocks reserved by the central protection and recovery time on the system availability.
Cotunneling and renormalization effects for the single-electron transistor
Creators: name: König, Jürgen
name: Schoeller, Herbert
name: Schön, Gerd
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study electron transport through a small metallic island in the perturbative regime. Using a diagrammatic real-time technique, we calculate the occupation of the island as well as the conductance through the transistor at arbitrary temperature and bias voltage in forth order in the tunneling matrix elements, a process referred to as cotunneling. Our formulation does not require the introduction of a cutoff. At resonance we find significant modifications of previous theories and quantitative agreement with recent experiments. We determine the renormalization of the system parameters and extract the arguments of the leading logarithmic terms (which can not be derived from usual renormalization group analysis). Furthermore, we perform the low- and high-temperature limits. In the former, we find a behavior characteristic for the multichannel Kondo model.
description: 30 pages, RevTex, 12 eps-figures
Locally U(1)*U(1) Symmetric Cosmological Models: Topology and Dynamics
Creators: name: Tanimoto, Masayuki
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show examples which reveal influences of spatial topologies to dynamics, using a class of spatially {\it closed} inhomogeneous cosmological models. The models, called the {\it locally U(1)$\times$U(1) symmetric models} (or the {\it generalized Gowdy models}), are characterized by the existence of two commuting spatial {\it local} Killing vectors. For systematic investigations we first present a classification of possible spatial topologies in this class. We stress the significance of the locally homogeneous limits (i.e., the Bianchi types or the `geometric structures') of the models. In particular, we show a method of reduction to the natural reduced manifold, and analyze the equivalences at the reduced level of the models as dynamical models. Based on these fundamentals, we examine the influence of spatial topologies on dynamics by obtaining translation and reflection operators which commute with the dynamical flow in the phase space.
description: 32 pages, 1 figure, LaTeX2e, revised Introduction slightly. To appear in CQG
Research on Real Time Implementation of Fuzzy Based Buck Boost Converter Using LabVIEW
Creators: name: M. Chelliah
name: C. Mari Muthu
Publisher: name: Zenodo
Year: 2021
Subjects: Fuzzy logic controller (FLC)
LabVIEW
NI DAQ
buck boost converter
duty cycle
MOSFET

description: Virtual instrumentation is defined as the combination of measurement and control the hardware and software with industry-standard computer technology to create user-defined instrumentation systems. In this paper, the two-input fuzzy logic controller (FLC) for buck boost converter output-voltage regulation is proposed by using LabVIEW. Here the output voltage has been used as a closed loop feedback to determine the output error (e) and the change in error (Δe) as two inputs to the controller. The elements of the buck boost converter as inductance and capacitor have been selected to insure continuous operating mode (CCM) and low output voltage ripple. The experimental results show that the FLC has a good output voltage response compared with PID controller response. This research has successfully showed that LabVIEW and Fuzzy Logic controller can be applied to develop a system for selecting the modes of controller.
Victoria triplaga Prout L. B 1915
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Geometridae
Victoria
Victoria triplaga

description: Victoria triplaga Prout L.B, 1915
COMMON NAME(S): Geometer moth.
SYNONYM(S): None.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Ethiopia, Kenya, Mozambique, Namibia, South Africa, Tanzania, Zambia, Zimbabwe.
LOCALITY IN ZAMBIA: Petauke, in Eastern Province.
LARVAL HOSTPLANT(S): Larval foodplants include the Loranthaceae species Plicosepalus curviflorus Tiegh. (African Moths 2019).
SOURCES: African Moths 2019; De Prins & De Prins 2022.
Genus Xenochroma Warren, 1902
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on pages 244-245, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
Serum remnant cholesterol is a potential predictor of liver stiffness in patients with nonalcoholic fatty liver disease
Creators: name: Wang, Ya
name: Song, Wanhan
name: Yuan, Qianhua
name: Mai, Meiqing
name: Luo, Mengliu
name: Fan, Jiahua
name: Zhang, Peiwen
name: Guo, Honghui
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Virology

description: Nonalcoholic fatty liver disease (NAFLD) is associated with dyslipidemia, and the connection between dyslipidemia and remnant cholesterol (RC), a component of triglyceride-rich lipoproteins, remains enigmatic. In this cross-sectional study, our primary aim was to investigate the role of RC in the progression of NAFLD and to provide robust evidence of RC’s involvement in the pathogenesis of NAFLD. We enrolled 2800 NAFLD patients from the National Health and Nutrition Examination Survey (NHANES). Logistic regression was employed to examine the relationship between serum RC levels and liver stiffness, while receiver operating characteristic (ROC) curve analysis was used to assess the diagnostic capability of RC. RC exhibited an independent correlation with the extent of liver stiffness, with odds ratios (OR) of 1.02 for liver steatosis (p = 0.014) and 1.02 for liver fibrosis (p = 0.014). To predict NAFLD, the optimal RC thresholds were 17.25 mg/dL for males and 15.25 mg/dL for females in the case of liver steatosis. For advanced liver fibrosis, the best thresholds were 17.25 mg/dL for males and 16.25 mg/dL for females. RC demonstrated a positive correlation with the degree of liver stiffness and exhibited superior diagnostic efficacy for liver steatosis and fibrosis compared to other cholesterol indicators. Elevated serum remnant cholesterol (RC) levels may serve as a potential indicator of metabolic diseases, including nonalcoholic fatty liver disease (NAFLD). The connection between serum RC and NAFLD has been previously undervalued. In our investigation, we examined 2800 NAFLD patients from the National Health and Nutrition Examination Survey (NHANES). Our cross-sectional study has revealed a more distinct relationship between RC and the degree of liver stiffness, especially concerning liver steatosis when compared to other cholesterol indicators. Recognizing RC’s significant role in metabolic disorders may lead to innovative approaches for diagnosing and treating NAFLD patients.
A superradiance resonance cavity outside rapidly rotating black holes
Creators: name: Andersson, Nils
name: Glampedakis, Kostas
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the late-time behaviour of a dynamically perturbed Kerr black hole. We present analytic results for near extreme Kerr black holes that show that the large number of virtually undamped quasinormal modes that exist for nonzero values of the azimuthal eigenvalue m combine in such a way that the field oscillates with an amplitude that decays as 1/t at late times. This prediction is verified using numerical time-evolutions of the Teukolsky equation. We argue that the observed behaviour may be relevant for astrophysical black holes, and that it can be understood in terms of the presence of a ``superradiance resonance cavity'' immediately outside the black hole.
description: 4 pages, 2 postscript figures
title: Ð¡Ð¸ÑÑÐµÐ¼Ð° ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð´Ð»Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð¸Ð½ÑÐµÑÐ½ÐµÑÐ° Ð²ÐµÑÐµÐ¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Speech recognition system for devices of the internet of things
Creators: name: ÐÐ¸ Ð®Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐÐµÐ¹ÑÐ¾Ð½Ð½ÑÐµ ÑÐµÑÐ¸
ÐÐ°ÑÐ¸Ð½Ð½Ð¾Ðµ Ð¾Ð±ÑÑÐµÐ½Ð¸Ðµ
Ð ÐµÑÑ

description: ÐÐ±ÑÐµÐºÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ â ÑÐ¸ÑÑÐµÐ¼Ð° ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð´Ð»Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð¸Ð½ÑÐµÑÐ½ÐµÑÐ° Ð²ÐµÑÐµÐ¹. Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ â ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð´Ð»Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð¸Ð½ÑÐµÑÐ½ÐµÑÐ° Ð²ÐµÑÐµÐ¹. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¾Ð±Ð¾Ð±ÑÐµÐ½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸, Ð²ÑÐ»ÐµÐ´ÑÑÐ²Ð¸Ðµ ÑÐµÐ³Ð¾ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ Ð½Ð¾Ð²ÑÐµ Ð¸Ð´ÐµÐ¸ Ð¸ Ð¿Ð¾Ð´ÑÐ¾Ð´Ñ Ðº ÑÐµÑÐµÐ½Ð¸Ñ Ð·Ð°Ð´Ð°ÑÐ¸ ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð´Ð»Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð² ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°Ñ Ð¸Ð½ÑÐµÑÐ½ÐµÑÐ° Ð²ÐµÑÐµÐ¹. ÐÐ»Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð¾Ð² ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð¾ Ð¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¾ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ðµ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾-Ð¼Ð°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ Ð´Ð»Ñ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ð¸ ÑÐµÑÐµÐ½Ð¸Ñ Ð·Ð°Ð´Ð°Ñ ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð´Ð»Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð¸Ð½ÑÐµÑÐ½ÐµÑÐ° Ð²ÐµÑÐµÐ¹ Ð½Ð° ÑÐ·ÑÐºÐµ Python Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸ÐµÐ¼ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½ÑÑ ÑÑÐµÐ´ÑÑÐ² Ð¸ Ð±Ð¸Ð±Ð»Ð¸Ð¾ÑÐµÐº Ð¼Ð°ÑÐ¸Ð½Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° Ð´Ð²ÑÑÐºÐ°ÑÐµÐ³Ð¾ÑÐ¸Ð¹Ð½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ ÑÐµÑÐ¸ Ð¸Ð¼ÐµÐµÑ ÑÐ¾ÑÐ½Ð¾ÑÑÑ Ð¾ÐºÐ¾Ð»Ð¾ 90%. ÐÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½ÑÐµ Ð¸ Ð°Ð¿Ð¿Ð°ÑÐ°ÑÐ½ÑÐµ Ð¼ÐµÑÐ¾Ð´Ñ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÑÐ¸ÑÑÐµÐ¼Ñ.
description: Object of study is speech recognition system for Internet of Things devices. The aim is to develop a speech recognition system for Internet of Things devices. The paper generalizes speech recognition methods, as a result of which new ideas and approaches to solving the problem of speech recognition for use in Internet of things devices are proposed. To implement the proposed approaches, specialized software and mathematical software has been developed and applied to carry out research and solve speech recognition problems for IoT devices in the Python language using software tools and machine learning libraries. The developed two-category speech recognition system, has an accuracy of about 90%. Software and hardware methods for increasing system performance are proposed.
Method of Conversion of Double Fed Machine Into Synchronous Operation Mode and its Simulation
Creators: name: L. H. Hasanova
Publisher: name: Reliability: Theory & Applications
Year: 2019
Subjects: double fed machine
synchronous operation mode
simulation
method of conversion.

description: Double fed induction machines, made on the base of wound rotor machines, thanks to the rapid progress in the converter equipment (due to widespread use of fully controlled thyristors and power transistors) nowadays are widely used as generators (wind power and small hydropower) as well as the motor-where relatively small speed adjustment range (30-40%) is required, by restrictions of the frequency inverter on the installed capacity. There are cases when the technology of their application as a generator and motor mode imposes their long-term operation in sub-synchronous rotational speed, i.e, without speed control. In this case, it is proposed to use only the rectifier side of the frequency inverter feeding the rotor winding of a double fed induction machines, switch into a synchronous mode of operation. This will greatly increase the delivery of reactive power into the grid and use the generator more efficiently. Presented a developed mathematical model of double fed induction machines, which allows to study of all operation modes of double fed induction machines in single set-up–by immediate designation (suband super-synchronous speed control); in synchronous generator mode with a significant reactive power output into the grid, as well as in squirrel cage induction generator mode.
СОВРЕМЕННЫЕ ТЕНДЕНЦИИ ПРИМЕНЕНИЯ ЦИФРОВЫХ ТЕХНОЛОГИЙ В ОБЛАСТИ ДЕФЕКТОЛОГИИ
Creators: name: Норбаева, Нафиса
name: Махмудова, Нодира
Publisher: name: Zenodo
Year: 2024

description: Статья посвящена современным тенденциям применения цифровых технологий в дефектологии — науке, которая изучает отклонения в психофизическом развитии человека. В последние годы цифровизация в сфере образования и реабилитации открывает новые возможности для диагностики, коррекции и социальной адаптации людей с ограниченными возможностями здоровья. В статье рассмотрены основные направления использования цифровых технологий, включая мультимедийные тесты, системы нейрофизиологического мониторинга, искусственный интеллект, а также инновационные методы обучения с применением адаптивных образовательных платформ, виртуальной и дополненной реальности. Также обсуждаются важные аспекты социальной адаптации и инклюзии через онлайн-платформы, группы поддержки и мобильные приложения. Использование робототехники и искусственного интеллекта в коррекционной работе с детьми с особыми потребностями, таких как роботы-ассистенты и анализ данных с помощью ИИ, значительно улучшает результаты реабилитации. В статье также отмечены вызовы и проблемы, связанные с подготовкой специалистов и доступом к современным технологиям в некоторых регионах. Цифровые технологии в дефектологии способствуют созданию инклюзивного общества и улучшению качества жизни людей с ограниченными возможностями.
Learning partial differential equations for biological transport models from noisy spatiotemporal data
Creators: name: Lagergren, John
name: Nardini, John T.
name: Lavigne, G. Michael
name: Rutter, Erica M.
name: Flores, Kevin B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We investigate methods for learning partial differential equation (PDE) models from spatiotemporal data under biologically realistic levels and forms of noise. Recent progress in learning PDEs from data have used sparse regression to select candidate terms from a denoised set of data, including approximated partial derivatives. We analyze the performance in utilizing previous methods to denoise data for the task of discovering the governing system of partial differential equations (PDEs). We also develop a novel methodology that uses artificial neural networks (ANNs) to denoise data and approximate partial derivatives. We test the methodology on three PDE models for biological transport, i.e., the advection-diffusion, classical Fisher-KPP, and nonlinear Fisher-KPP equations. We show that the ANN methodology outperforms previous denoising methods, including finite differences and polynomial regression splines, in the ability to accurately approximate partial derivatives and learn the correct PDE model.
Risk and prediction of kidney failure early after liver transplantation
Creators: name: Innanen, Tuija
name: Sallinen, Ville
name: Helanterä, Ilkka
name: Eerola, Verner
name: Nordin, Arno
name: Åberg, Fredrik
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Science Policy
subject: Virology

description: Kidney disease is common after liver transplantation (LT), but postoperative kidney failure is difficult to predict. Current guidelines recommend simultaneous liver-kidney transplantation (SLKT) in patients with pre-LT estimated glomerular filtration rate (eGFR) below 30–40 mL/min, which might be too liberal. The aim of this study was to evaluate the risk of kidney failure after LT. We also assessed the predictive ability of pretransplantation eGFR using various equations. This single-center study included patients undergoing primary LT 2006–2020. Patients undergoing simultaneous liver-kidney transplantations or on dialysis before LT were analysed separately. We calculated 5 different eGFR equations measured just before LT and assessed their predictive ability using Kaplan-Meier cumulative incidence estimates. Among 556 LT patients with a median follow-up of 5.0 years (IQR 2.0–8.5), 20 developed kidney failure during follow-up, 7 of them within 1-year post LT. Six of these 7 suffered from major perioperative complications. Depending on the eGFR equation used, the incidence of kidney failure within 1-year was 3.9–6.7% at pre-LT eGFR-values <30 mL/min, 1.2–3.1% at eGFR 30–60 mL/min, and 0.6–0.9% at eGFR >60 mL/min. Kidney failure within 1-year post-LT could not be reliably predicted by pre-LT eGFR. However, kidney failure was uncommon even in patients with severely reduced pre-LT glomerular filtration rate (eGFR <30 mL/min), and extremely rare in patients unaffected by major perioperative complications. Our data prompts further consideration regarding the guidelines for SLKT in patients with a reduced preoperative eGFR.
Maintenance of Reliability of Methodical Support of the Management of Objects EPS
Creators: name: Farhadzadeh E., M.
name: Muradaliyev A., Z.
name: Rafiyeva T., K.
name: Rustamova A., A.
Publisher: name: Reliability: Theory & Applications
Year: 2019
Subjects: Reliability
faultlessness
statistical data
methods
fiducially approach
abnormal realizations
the importance.

description: One of the basic problems of development of intellectual control systems of maintenance service and repair of the equipment and devices of electro power systems is increase of reliability of methodical recommendations. The risk of the erroneous decision exists, first of all, because of presence among statistical data of operation of gross blunders, abnormal values. If to that still to add difference not casual samples statistical data of operation from theoretical representative samples random variables from a general data set, to consider multivariate character of statistical data of operation and absence of methods of the analysis small samples multivariate data, difficulty of the decision of this problem becomes obvious. The method which on the basis of fiducially the approach and theories of check of statistical hypotheses is capable to reveal abnormal realizations is developed. And application the express train-methods of calculation of critical fiducially values an interval for the chosen significance value, allows to solve this problem without special tables and the COMPUTER.
Finite Temperature and Dynamical Properties of the Random Transverse-Field Ising Spin Chain
Creators: name: Young, A. P.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study numerically the paramagnetic phase of the spin-1/2 random transverse-field Ising chain, using a mapping to non-interacting fermions. We extend our earlier work, Phys. Rev. 53, 8486 (1996), to finite temperatures and to dynamical properties. Our results are consistent with the idea that there are ``Griffiths-McCoy'' singularities in the paramagnetic phase described by a continuously varying exponent $z(δ)$, where $δ$ measures the deviation from criticality. There are some discrepancies between the values of $z(δ)$ obtained from different quantities, but this may be due to corrections to scaling. The average on-site time dependent correlation function decays with a power law in the paramagnetic phase, namely $τ^{-1/z(δ)}$, where $τ$ is imaginary time. However, the typical value decays with a stretched exponential behavior, $\exp(-cτ^{1/μ})$, where $μ$ may be related to $z(δ)$. We also obtain results for the full probability distribution of time dependent correlation functions at different points in the paramagnetic phase.
description: 10 pages, 14 postscript files included. The discussion of the typical time dependent correlation function has been greatly expanded. Other papers of APY are available on-line at http://schubert.ucsc.edu/peter
Study of Stochastic Model of a Two Unit System with Inspection and Replacement Under Multi Failure
Creators: name: Sharma, Neha
name: J P Singh Joorel
Publisher: name: Reliability: Theory & Applications
Year: 2019
Subjects: inspection
preparation time
replacement
minor failure
major failure.

description: The present paper studies a two non-identical units system model arranged in parallel with inspection and preparation time for replacement under multi failures. Initially, first unit (A) is in operative mode and other unit (B) is kept as warm standby. The first unit is subjected to two types of failures, i.e. minor failure and major failure. On failure of the first unit, it will be sent for inspection to check the type of failure i.e. whether minor or major failure. If some minor failure is found, it will be repaired and on major failure, the unit will be replaced by the new unit. However, the system will take some preparation time for replacement. Further, the standby unit may also fail during the standby mode. There is a single repairman which is always available with the system. Different measures of reliability have been obtained to study the effectiveness of the system such as transition probabilities, mean time to system failure, availability, busy period of repairman and net profit incurred and various system parameters are analysed graphically.
Manually Operated Onion Bulblet Planter over a Traditional Method of Planting: A Comparative Study
Creators: name: Falguni Rathore
name: Chaturvedi, Shalini
name: N. K. Khandelwal
Publisher: name: Zenodo
Year: 2021
Subjects: Onion planter
field efficiency
chisel type furrow opener

description: The study was conducted that the comparison between the planting of onion by manually operated onion bulblet planter over a hand planting method (Traditional method of planting) in the college of Agricultural Engineering JNKVV Jabalpur. A manually operated onion bulblet planter was developed with an inclined plate metering device. The performance evaluation of developed planter in term of field efficiency and missing hill percentage. And it also compares the cost and time of operation of developed planter over a hand planting. The results showed that the field efficiency was 83.33% with chisel type furrow opener and the missing index percentage was 2.22%. It observed that the cost of planting by manually operated onion bulblet planter was Rs. 1790.81 per hectare of land as compared to the hand planting method for one hectare of land was required 65 man days and cost of Rs. 9300. Time and labour can be saved with the planter compared to the traditional method of planting.
Crossovers in the Two Dimensional Ising Spin Glass with ferromagnetic next-nearest-neighbor interactions
Creators: name: Parisi, G.
name: Ruiz-Lorenzo, J. J.
name: Stariolo, D.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: By means of extensive computer simulations we analyze in detail the two dimensional $\pm J$ Ising spin glass with ferromagnetic next-nearest-neighbor interactions. We found a crossover from ferromagnetic to ``spin glass'' like order both from numerical simulations and analytical arguments. We also present evidences of a second crossover from the ``spin glass'' behavior to a paramagnetic phase for the largest volume studied.
description: 19 pages with 9 postscript figures also available at http://chimera.roma1.infn.it/index_papers_complex.html. Some changes in captions of figures 1 and 2
Reliability Modelling and Assessment of Multi Standby Hybrid System
Creators: name: Yusuf, Ibrahim
name: Surajo Mahmud Umar
Publisher: name: Reliability: Theory & Applications
Year: 2019
Subjects: Availability
mean time to failure
supporting device
single unit

description: Systems connected to an external supporting device for their operations viewed as hybrid systems have been manufactured to meet the demand of industries, economic growth and populace in general. Companies and organizations heavily rely on these systems to conduct their business. The paper deals with the reliability and availability characteristics of four different systems requiring external supporting device for their operation. The system consists of main unit connected to the cold standby supporting devices. The failure and time of both main unit and supporting device are assumed to be exponentially distributed. Markov models are developed and differential difference equations are derived to obtain explicit expressions for the steady-state availability and mean time to failure and perform analytical and numerical comparisons. Comparisons show that system with five cold standby supporting devices is the most reliable system.
$\textit{Ab initio}$ derivation of effective Hamiltonian for La$_{2}$CuO$_{4}$/La$_{1.55}$Sr$_{0.45}$CuO$_{4}$ heterostructure
Creators: name: Tadano, Terumasa
name: Nomura, Yusuke
name: Imada, Masatoshi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We formulate a method of deriving effective low-energy Hamiltonian for nonperiodic systems such as interfaces for strongly correlated electron systems by extending conventional multi-scale $\textit{ab initio}$ scheme for correlated electrons (MACE). We apply the formalism to copper-oxide high $T_{\rm c}$ superconductors in an example of the interface between overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ and Mott insulating La$_{2}$CuO$_{4}$ recently realized experimentally. We show that the parameters of the $E_g$ Hamiltonian derived for the La$_{2}$CuO$_{4}$/La$_{1.55}$Sr$_{0.45}$CuO$_{4}$ superlattice differ considerably from those for the bulk La$_{2}$CuO$_{4}$, particularly significant in the partially-screened Coulomb parameters and the level offset between the $d_{x^{2}-y^{2}}$ and $d_{z^{2}}$ orbitals, $ΔE$. In addition, we investigate the effect of the lattice relaxation on the $E_g$ Hamiltonian by carefully comparing the parameters derived before and after the structure optimization. We find that the CuO$_{6}$ octahedra distort after the relaxation as a consequence of the Madelung potential difference between the insulator and metal sides, by which the layer dependence of the hopping and Coulomb parameters becomes more gradual than the unrelaxed case. Furthermore, the structure relaxation dramatically changes the $ΔE$ value and the occupation number at the interface. This study not only evidences the importance of the ionic relaxation around interfaces but also provides a set of layer-dependent parameters of the $E_g$ Hamiltonian, which is expected to provide further insight into the interfacial superconductivity when solved with low-energy solvers.
description: 13 pages, 11 figures, with supplemental materials (3 pages, 3 figures). Fixed MathJaX formatting issues in the title and abstract. The main text is not updated
Dataset for Everyday Childhoods research project. Everyday Childhoods DOI 10.25377/sussex.7977296
Creators: name: Berriman, Liam
Publisher: name: University of Sussex
Year: 2019
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Digital Humanities

description: The DOI for Everyday Childhoods dataset. This item belongs to the Everyday Childhoods project dataset. For more information, click on the project or collection link.
Expenditure and survival of adult patients with intestinal failure due to short bowel syndrome: real-world evidence from Southern Finland
Creators: name: Ukkola-Vuoti, Liisa
name: Tuominen, Samuli
name: Pohju, Anne
name: Kovac, Bianca
name: Lassenius, Mariann Ida
name: Merras-Salmio, Laura
name: Pakarinen, Mikko P.
name: Sallinen, Ville
name: Pikkarainen, Sampsa
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Computational Biology

description: Comprehensive follow-up data from the largest hospital district in Finland was used to assess hospital-based healthcare resource utilization (HCRU) and expenses, incidence and prevalence, survival, and effect of comorbidities/complications on survival of adult patients with intestinal failure due to short bowel syndrome (SBS-IF). This study utilized electronic healthcare data covering all ≥18-year-old patients with SBS-IF at the Hospital District of Helsinki and Uusimaa in Finland between 2010 and 2019. Patients were followed from SBS-IF onset until the end of 2020 or death and compared to birth year and sex-matched control patients without SBS-IF. The study included 77 patients with SBS-IF (cases) and 363 controls. Cases had high HCRU; the cumulative expenses were about tenfold compared to the controls, at the end of the study (€123,000 vs. €14,000 per patient). The expenses were highest during the first year after SBS-IF onset (€53,000 per patient). Of the cases with a median age 62.5 years, 51.9% died during study time. The median survival was 4.4 years from SBS-IF onset and cases died 13.5 times more likely during the follow-up compared to controls. Mortality risk was lower in female cases (hazard ratio (HR) 0.46; 95% confidence intervals (CI) 0.24, 0.9) and higher with presence of comorbidities (Charlson comorbidity index HR 1.55; 95% CI 1.2, 2.0) and mesenteric infarction (HR 4.5; 95% CI 1.95, 10.36). The incidence of adult SBS-IF was 0.6 per 100,000 adults. Our study demonstrates a high demand for healthcare support and elevated mortality in adult SBS-IF-patients. Our results suggest that the presence of comorbidities is a key driver for mortality.