检索结果-内蒙古大学图书馆

Determinants of Cybercrime Victimization: Experiences and Multi-stage Recommendations from a Survey in Cameroon 14th

Determinants of Cybercrime Victimization: Experiences and Mu...

引用

14th EAI International Conference on Towards new e-Infrastructure and e-Services for Developing Countries, AFRICOMM 2022

作者： Ntsama, Jean Emmanuel Tchakounte, Franklin Tchakounte Tchuimi, Dimitri Faissal, Ahmadou Fotso Kuate, Franck Arnaud Effa, Joseph Yves Udagepola, Kalum Priyanath Atemkeng, Marcellin Department of Mathematics and Computer Science Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon Yaoundé Cameroon Department of Human Resource Economics Faculty of Economics and Management University of Yaoundé II SOA Yaoundé Cameroon Department of Physics Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon Department of Information and Computing Sciences Scientific Research Development Institute of Technology Loganlea Australia Department of Mathematics Rhodes University Makhanda South Africa

ISBN: (纸本)9783031348952

Cybercrimes are multiplying and spreading at an elusive speed commensurate with the emerging technologies of the fourth revolution. Their sophistication and user’s vulnerability to attacks catalyze their success. Several surveys have been conducted to determine the factors favoring victimization. However, they can only be applied within a contextual framework since each ecosystem has particularities. Attempts in this direction are unavailable in Cameroon where cybercrimes cost 12.2 billion CFA in 2021. This work consists of a semi-direct survey conducted in Cameroon in 2021 to provide the determinants explaining the most frequent cybercriminal techniques, the vulnerabilities left by the users, the most targeted population segments, and the socio-demographic and economic factors justifying this security fragility. The results relate to 370 questionnaires collected throughout the territory. According to descriptive statistics and the chi-square test, the explanatory variables of cybercrime victimization are gender, age, intellectual level, level of digital knowledge, level of Information and Communication technology (ICT) proficiency, type of equipment used, the mobile and desktop operating system used, the possession of an anti-virus/anti-spam and the marital status. Within this work, we have identified threats and their drivers and a theoretical framework has been provided with several stages that could be followed to contain cybercrime. © 2023, ICST Institute for computer sciences, Social Informatics and Telecommunications Engineering.

关键词： Statistical tests

来源：评论

学校读者我要写书评

暂无评论

MIRROR MATTER IN ORTHO-POSITRONIUM DECAY SEARCHES USING THE J-PET DETECTOR

Acta Physica Polonica B, Proceedings Supplement

引用

Acta Physica Polonica B, Proceedings Supplement 2024年第7期17卷

作者： Mędrala-Sowa, Justyna Perez del Rio, Elena Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Theranostics Jagiellonian University Kraków31-501 Poland

Positronium (Ps), governed by Quantum Electrodynamics (QED), provides a rich domain for exploring fundamental physics. Monte Carlo simulations of its decay provide insights into various aspects of particle physics. The development of J-PET, an innovative tomography system at the Jagiellonian university using high-resolution scintillator detectors, facilitates interdisciplinary studies encompassing fundamental physics tests, medical research, and quantum entanglement measurements but also enhances our capacity to investigate positronium decays in pursuit of potential dark matter (DM) candidates, a lingering enigma within the current Standard Model (SM) framework. In our research, we employ the J-PET detector to study ortho-positronium (o-Ps) decays as a part of our ongoing quest for the discovery of DM. Our primary goal is to explore mirror matter, which seeks to restore parity invariance and is proposed as a candidate for the Universe’s DM. Our study aims to push the boundaries of precision measurement in the decay width of o-Ps to three gamma quanta, contributing to our understanding of the elusive nature of dark matter. The article presents the preliminary lifetime distribution of o-Ps as a search for mirror matter obtained from data collected during a portion of a long-term measurement conducted with the J-PET detector in 2020. The long-term aim of the study is to achieve 10−6 lifetime sensitivity. © 2024 Jagiellonian university. All rights reserved.

关键词： Mirrors

来源：评论

学校读者我要写书评

暂无评论

TOWARDS STUDIES OF RARE DECAYS OF POSITRONIUM WITH J-PET

Acta Physica Polonica B, Proceedings Supplement

引用

Acta Physica Polonica B, Proceedings Supplement 2024年第1期17卷 1A91-1A98页

作者： Tanty, Pooja del Rio, Elena Perez Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Theranostics Jagiellonian University Kraków31-501 Poland

The positronium system, a bound state of an electron and a positron, is suitable for testing the predictions of quantum electrodynamics (QED) as well as symmetry invariance. The Ps triple state, the ortho-Positronium (o-Ps), which mainly decays to three photons, is further studied to search for decays into 4γ and 5γ, the former C-violating decay and the latter never observed. The J-PET is a multi-purpose detector optimized for the detection of photons from positron–electron annihilation and can be used in a broad scope of interdisciplinary investigation. The large acceptance and high angular resolution of the J-PET detector will push the present limits in these forbidden and rare decays. The aim is to reach a sensitivity below O(10−6) while reducing the uncertainties, thus increasing the sensitivity. © 2024 Jagiellonian university. All rights reserved.

关键词： Positrons

来源：评论

学校读者我要写书评

暂无评论

Antiferromagnetic hysteresis above the spin-flop field

引用

Physical Review B 2023年第6期107卷 L060403-L060403页

作者： M. J. Grzybowski C. F. Schippers O. Gomonay K. Rubi M. E. Bal U. Zeitler A. Kozioł-Rachwał M. Szpytma W. Janus B. Kurowska S. Kret M. Gryglas-Borysiewicz B. Koopmans H. J. M. Swagten Department of Applied Physics Eindhoven University of Technology PO Box 513 5600 MB Eindhoven The Netherlands Faculty of Physics University of Warsaw ul. Pasteura 5 PL-02-093 Warsaw Poland Institute of Physics Johannes Gutenberg-University Mainz 55128 Mainz Germany High Field Magnet Laboratory (HFML-EMFL) Radboud University 6525 ED Nijmegen The Netherlands Faculty of Physics and Applied Computer Science AGH University of Science and Technology 30-059 Kraków Poland Institute of Physics Polish Academy of Sciences Al. Lotników 32/46 PL-02-668 Warsaw Poland

Magnetocrystalline anisotropy is essential in the physics of antiferromagnets and commonly treated as a constant, not depending on an external magnetic field. However, we demonstrate that in CoO the anisotropy should necessarily depend on the magnetic field, which is shown by the spin Hall magnetoresistance of the CoO|Pt device. Below the Néel temperature CoO reveals a spin-flop transition at 240 K at 7.0 T, above which a hysteresis in the angular dependence of magnetoresistance unexpectedly persists up to 30 T. This behavior is shown to agree with the presence of the unquenched orbital momentum, which can play an important role in antiferromagnetic spintronics.

关键词： Antiferromagnetism Spin Hall magnetoresistance Spin-orbit coupling Spintronics Antiferromagnets Thin films Transition metal oxides Angular momentum Resistivity measurements Transport techniques

来源：评论

学校读者我要写书评

暂无评论

Improvement of subjective time perception and work efficiency in isolation via dedicated biofeedback Android application mSTPA (mobile Subjective Time Perception Analysis) 73

Improvement of subjective time perception and work efficienc...

引用

73rd International Astronautical Congress, IAC 2022

作者： Daniol, Mateusz Kolodziejczyk, Agata Grzelak, Wojtek Singh, Apoorva Harasymczuk, Mateusz Department of Metrology and Electronics Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Mickiewicza Ave. 30 Krakow30-059 Poland Space Technology Centre AGH University of Science and Technology Mickiewicza Ave. 30 Krakow30-059 Poland Analog Astronaut Training Center Kolo Strzelnicy 8A Krakow30-219 Poland

Time perception is one of the factors that affect work efficiency and performance at work, especially during isolation, especially in space. In this study we present an idea of improvement of time perception measurement using Android OS based app for time perception measurement and work efficiency evaluation. The app was implemented using MVVM architecture and offered two tasks - passive and active time perception. In both tasks simple shape appeared and disappeared on the screen after given amount of time. In the first task, user had to guess and type how much time passed when the shape has been visible, in the second he was asked to hold the button for the same amount of time. Each analog astronaut had to perform a time perception test each day during their mission. All the results have been sent and analysed on the server. Authors propose also methods for work efficiency measurement - using the questionnaire or specially designed app. Work efficiency and subjective time perception also depended on analog astronauts physical activity which we observed based on the results. Finally, the role of Mission Control Center crew has been discussed, as well as its impact on work efficiency and time perception. Copyright © 2022 by the International Astronautical Federation (IAF). All rights reserved.

关键词： Efficiency

来源：评论

学校读者我要写书评

暂无评论

Holes in Convex and Simple Drawings 32

Holes in Convex and Simple Drawings

引用

32nd International Symposium on Graph Drawing and Network Visualization, GD 2024

作者： Bergold, Helena Orthaber, Joachim Scheucher, Manfred Schröder, Felix Institute of Computer Science Freie Universität Berlin Germany TUM School of Computation Information and Technology Technische Universität München Germany Institute of Software Technology Graz University of Technology Austria Institut Für Mathematik Technische Universität Berlin Germany Department of Applied Mathematics Faculty of Mathematics and Physics Charles University Prague Czech Republic Institute of Mathematics Technische Universität Berlin Germany

ISBN: (纸本)9783959773430

Gons and holes in point sets have been extensively studied in the literature. For simple drawings of the complete graph a generalization of the Erdos-Szekeres theorem is known and empty triangles have been investigated. We introduce a notion of k-holes for simple drawings and study their existence with respect to the convexity hierarchy. We present a family of simple drawings without 4-holes and prove a generalization of Gerken's empty hexagon theorem for convex drawings. A crucial intermediate step will be the structural investigation of pseudolinear subdrawings in convex drawings. © Helena Bergold, Joachim Orthaber, Manfred Scheucher, and Felix Schröder.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

Forward γ +jet production in proton-proton and proton-lead collisions at LHC within the FoCal calorimeter acceptance

引用

European Physical Journal C 2023年第9期83卷 868页

作者： Ganguli, Ishita Hameren, Andreas van Kotko, Piotr Kutak, Krzysztof Faculty of Physics and Applied Computer Science AGH University of Krakow al. Mickiewicza 30 Kraków30-059 Poland Institute of Nuclear Physics Polish Academy of Sciences Radzikowskiego 152 Kraków31-342 Poland

Using the small-x improved transverse momentum dependent factorization (ITMD), which, for a general two-to-two massless scattering can be proved within the color glass condensate (CGC) theory for transverse momenta of particles greater than the saturation scale, we provide predictions for isolated forward photon and jet production in proton-proton and proton-nucleus collisions within the planned ALICE FoCal detector acceptance. We study azimuthal correlations, pT spectra, as well as normalized ratios of proton-proton cross sections for different energies. The only TMD distribution needed for that process is the "dipole" TMD gluon distribution, which in our computations is based on HERA data and undergoes momentum space BK evolution equation with DGLAP corrections and Sudakov resummation. We conclude, that the process provides an excellent probe of the dipole TMD gluon distribution in saturation regime. © 2023, The Author(s).

关键词： Forward scattering

来源：评论

学校读者我要写书评

暂无评论

AAK24: Global QCD analysis on polarized parton distribution in the presence of A2 asymmetry measurements

arXiv

引用

arXiv 2024年

作者： Arbabifar, Fatemeh Tehrani, Shahin Atashbar Khanpour, Hamzeh Department of Physics Education Farhangian University P.O.Box 14665-889 Tehran Iran P.O.Box 19395-5531 Tehran Iran Department of Physics Faculty of Nano and Bio Science and Technology Persian Gulf University Bushehr75169 Iran AGH University Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-055 Poland Department of Physics University of Science and Technology of Mazandaran P.O.Box 48518-78195 Behshahr Iran

This article introduces AAK24, a Next-to-Leading Order (NLO) QCD analysis of polarized data from both polarized Deep Inelastic Scattering (DIS) and Semi-Inclusive Deep Inelastic Scattering (SIDIS) experiments on the nucleon. The AAK24 QCD analysis incorporates SU(2) and SU(3) symmetry breaking, specifically δū ≠ δd¯ ≠ δs¯, while assuming δs¯ and δs are equal. Emphasizing the significance of the semi-inclusive data, the study explores the determination of polarized sea quark distributions. Recent experimental data from JLAB17, COMPASS16, and COMPASS17, including the A2 asymmetry measurements along with SIDIS observables, are thoroughly examined for their impact on the central values of polarized PDFs, their uncertainties, and overall fit quality. Additionally, we include the nonperturbative target mass corrections (TMC) as well as higher-twist terms (HT) which are particularly important. In this work, the uncertainties are quantified using the standard Hessian method. The main results and findings of the AAK24 QCD analysis show overall good agreement with the analyzed experimental data, aligning well with other polarized PDF determinations, particularly DSSV14, LSS10, JAM17, and AKS14, all considering SU(2) and SU(3) symmetry breaking. © 2024, CC BY.

关键词： Polarization

来源：评论

学校读者我要写书评

暂无评论

Kolmogorov–Arnold neural network for identification of functional groups from FTIR spectra

引用

Chemometrics and Intelligent Laboratory Systems 2025年 263卷

作者： Urbańczyk, Tomasz Bożek, Jakub Mirczak, Szymon Koperski, Jaroslaw Krośnicki, Marek Smoluchowski Institute of Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Lojasiewicza 11 Kraków 30-348 Poland Institute of Theoretical Physics and Astrophysics Faculty of Mathematics Physics and Informatics University of Gdansk Wita Stwosza 57 Gdańsk 80-308 Poland

New architecture of a deep neural network for identification of functional groups of molecules based on FTIR spectra is presented. The architecture employs the innovative Kolmogorov–Arnold layers. Instead of a single weight, each input in neurons belonging to these layers, possesses an independent learnable activation function. The article analyzes the quality of the neural network prediction for convolutional network containing Kolmogorov–Arnold layers in comparison with a classic convolutional neural network for 22 functional groups. The obtained results are compared with the results available from other studies. © 2025 Elsevier B.V.

关键词： Convolutional neural networks

来源：评论

学校读者我要写书评

暂无评论

Modelling in-device inference and classification of binary digits using nonlinear dynamics of spin Hall oscillator

Modelling in-device inference and classification of binary d...

引用

2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Mohan, John Rex Yamanaka, Chisato Feng, Ryoyan Mathew, Arun Jacob Nakamura, Yoji Medwal, Rohit Gupta, Surbhi Rawat, Rajdeep Singh Fukuma, Yasuhiro Kyushu Institute of Technology Faculty of Computer Science and Systems Engineering Department of Physics and Information Technology Iizuka820-8592 Japan Indian Institute of Technology Kanpur Department of Physics Kanpur208016 India National Institute of Education Nanyang Technological University Natural Sciences and Science Education 637616 Singapore Kyushu Institute of Technology Research Center for Neuromorphic AI Hardware Kitakyushu808-0196 Japan

ISBN: (纸本)9798350338362

In this work, we employ micromagnetic modelling of a spin Hall oscillator for a direct inference and classification of binary digit inputs. The spectral characteristics of the oscillation is utilized for the classification. We observed a direct inference of binary digit inputs up to a sequence of four binary digits. Subsequently, handwritten digit image recognition is tested with the Modified National Institute of Standards and Testing (MNIST) handwritten digit database and acquired an accuracy of 88.6% with a linear classifier network. © 2023 IEEE.

关键词： Classification (of information)

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：