检索结果-内蒙古大学图书馆

10th Asian Physics Symposium 2023, APS 2023

作者： Firdausyi, Alya Mutiara Dini, Septian Ulan Nurafni, Sevi Viridi, Sparisoma Master Program in Computational Science Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung40132 Indonesia Master Program in Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung40132 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung 40132 Indonesia

Good emergency management is essential in planning events that have the potential to endanger lives, one of which is preparing for an effective and efficient evacuation. Evacuation evaluation using a fire drill is not optimal because it does not describe the emergency. Therefore, agent-based modeling is carried out to see interactions between individuals and their environment during evacuation. ABM (Agent-Based Modeling) is combined with a social-force model, which is the source of the agent's movement style toward goals and avoiding obstacles. The simulation is carried out using NetLogo 6.3.0 software, which can represent agents spread across a 2-dimensional room with variations in room size, exits, and the number of agents involved. Several characteristics are given to the agent to cause heterogeneity, including age categories in the form of children, adults, people over 70, and people with disabilities, which will determine the agent's walking speed. The measurements observed were the average duration of evacuation and the average speed of agents. From the simulation results, it can be concluded that using the social force model will lead to the emergence of collective behavior, such as clogging and arching in agents. The exact population density in different room areas will affect the evacuation duration, whereas a larger room area will cause the agent to travel a greater distance to the exit. An increase in evacuation duration will accelerate rapidly at low densities and slow down as density increases. © Published under licence by IOP Publishing Ltd.

关键词： Population statistics

来源：评论

学校读者我要写书评

暂无评论

Spectroscopic Observations of Ten Galactic Wolf-Rayet Stars at Bosscha Observatory:Determination of Stellar Parameters and Mass-loss Rates

引用

Research in Astronomy and Astrophysics 2024年第9期24卷 7-27页

作者： Hakim Luthfi Malasan Bakuh Danang Setyo Budi Department of Astronomy Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungBandung 40132Indonesia Bosscha Observatory Institut Teknologi BandungLembang 40391Indonesia Master Program in Astronomy Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia

We present optical spectra of 10 Galactic Wolf-Rayet(WR)stars that consist of five WN and five WC *** optical observation was conducted using a low-resolution spectrograph NEO-R1000(λ/Δλ~1000)at GAO-ITB RTS(27.94 cm,F/10.0),Bosscha Observatory,*** implemented stellar atmosphere Postdam Wolf-Rayet(PoWR)grid modeling to derive stellar *** normalized optical spectrum can be used to find the best model from the available PoWR grid,then we could derive stellar temperature and transformation *** derive luminosity,stellar radius and color excess,we conducted a Spectral Energy Distribution(SED)analysis with additional data on the near-ultraviolet spectrum from the International Ultraviolet Explorer(IUE)database,and UBV and 2MASS JHK broadband filter *** analysis to derive asymptotic terminal wind velocity was conducted from the P-Cygni profile analysis of the high-resolution IUE ultraviolet *** previously derived parameters,we could determine the mass loss rate of the WR ***,we compared our results with previous work that used PoWR code and the differences are not more than 20%.We conclude that the PoWR spectral grid is sufficient to derive WR stellar parameters quickly and could provide more accurate initial parameter input to the PoWR program code.

关键词： stars:massive stars:mass-loss stars:Wolf-Rayet stars:atmospheres stars:winds outflows

来源：评论

学校读者我要写书评

暂无评论

Workshop on Young Crescent Moon: Visibility Limit and Digital Image Contrast

Workshop on Young Crescent Moon: Visibility Limit and Digita...

引用

2023 International Symposium From the Universe Back to Earth: Developing Astronomy to Meet Today's Natural Challenges

作者： Hasan Faadillah, M. Kurniasari, Martha Asmoro, Cahyo P. Ikbal Arifyanto, M. Mahasenaputra Herdiwijaya, Dhani Irfan Hakim, M. Hidayat, Taufiq Jaelani, Anton T. Mulki, Fargiza A. M. Master Program in Astronomy Facullty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Astronomy Research Group Institut Teknologi Bandung Indonesia

The Institut Teknologi Bandung's Astronomy Research Group hosted a workshop centered on understanding the young crescent moon (Hilal) phenomenon in Islamic astronomy. The primary focus was disseminating cutting-edge research, particularly a methodology for measuring digital image contrast to determine the young crescent's visibility threshold. Participants included lecturers from Islamic Universities, private observatory administrators/observers, and astronomy enthusiasts. The workshop covered image processing fundamentals, hands-on activities involving digital image capture, and practical use of AstroImageJ software. Comprehensive feedback assessment measured its effectiveness. Additionally, the workshop aimed to promote research relevant to Islamic religious practices and introduce prospective students to Astronomy master's and doctoral programs, fostering a crucial link between research and education in Islamic astronomy. © Published under licence by IOP Publishing Ltd.

关键词： Visibility

来源：评论

学校读者我要写书评

暂无评论

Spatial and Time Series Modelling for the Groundwater Level of Peatlands in Riau and Central Kalimantan, Indonesia 1

引用

4th International Conference on mathematics, Statistics, and Computing Technology, ICMSCT 2023

作者： Mukhaiyar, Utriweni Mahdiyasa, Adilan Widyawan Prastoro, Tarasinta Suherlan, Bagas Caesar Pasaribu, Udjianna Sekteria Indratno, Sapto Wahyu Statistics Research Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Indonesia Master Program in Actuarial Science Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Indonesia

ISBN: (数字)9789819734504

ISBN: (纸本)9789819734498

Peatlands serve as vital carbon reservoirs, exhibiting two stability conditions. In a stable state, they absorb CO2 with slow decomposition. In contrast, an unstable state causes faster decomposition, leading to increased carbon emissions and a higher risk of peatland fires. Studies have found that carbon emissions positively correlate with lower water table depths, resulting in a higher emission rate. Considering peatlands’ behaviour, an autoregressive integrated moving average (ARIMA) model was used to predict the groundwater level in order to anticipate the risk of the unstable condition. The data taken was in Indragiri Hilir, Riau, and Pulang Pisau, Central Kalimantan, from 27 February 2021 to 18 March 2023. Furthermore, the Ordinary Kriging (OK) was used to estimate the groundwater level in the unobserved locations. Thus, the potential risk map of peatlands could be obtained. The forecasts showed that the groundwater level area decreased from March to May 2023, in line with the season change. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Carbon sequestration

来源：评论

学校读者我要写书评

暂无评论

The Vertex Degree of Relative G-Noncommuting Graph of the Dihedral Groups 8th

The Vertex Degree of Relative G-Noncommuting Graph of the...

引用

8th International Conference on mathematics: Pure, Applied and Computation, ICoMPAC 2023

作者： Supu, Nur’Ain Muchtadi Alamsyah, Intan Suwastika, Erma Master’s Program in Mathematics Institut Teknologi Bandung Bandung Indonesia Algebra Research Group Institut Teknologi Bandung Bandung Indonesia Combinatorial Mathematics Research Group Institut Teknologi Bandung Bandung Indonesia

ISBN: (纸本)9789819721351

Let G be a finite group, H be a subgroup of G, and g be a fixed element of G. The relative g-noncommuting graph Γg,H,G of G is defined as a graph with the vertex set G where two distinct vertices x and y are adjacent if [x,y]≠g and [x,y]≠g-1, and at least one of x or y belongs to H. This paper will discuss the vertex degree of the relative g-noncommuting graph for the dihedral group D2n, focusing specifically on cases where n is an even number. In this dihedral group, only two types of subgroups will be discussed, namely H=⟨a⟩ and H={e,ajb∣a,b∈G} for some j=0,1,⋯,n-1. Additionally, we will examine several topological indices of the relative g-noncommuting graph, including the first Zagreb index, the Wiener index, the edge Wiener index, the Hyper Wiener index, and the Harary index. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Graph theory

来源：评论

学校读者我要写书评

暂无评论

Neutronic and Proliferation Resistance Analysis of Small Modular Pressurized Water Reactor with Various Fuel Types using SRAC 2006 10

Neutronic and Proliferation Resistance Analysis of Small Mod...

引用

10th Asian Physics Symposium 2023, APS 2023

作者： Amatullah, Amila Permana, Sidik Pramuditya, Syeilendra Master Program in Nuclear Science and Engineering Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Ganesha No. 10 Bandung Indonesia Graduate Program in Nuclear Science and Engineering Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Ganesha No. 10 Bandung Indonesia Graduate Program in Physics Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Ganesha No. 10 Bandung Indonesia

One strategy for emission reduction in Indonesia is the dedieselization program, replacing diesel power plants with renewables. Pressurized Water Reactor (PWR) type Small Modular Reactor (SMR) is also a consideration. This study aims to compare fuel performance in SMRs. Four fuel types with varying fissile and fertile nuclides but equal fissile mass percentages were assessed: U235- U238, U235-Th232, U233-U238, and U233-Th232, using PIJ SRAC 2006 and JENDL 4.0. Parameters include neutron multiplication factor, conversion ratio, and isotope production. Results indicated that U233-U238 has a highest initial neutron multiplication factor, 1.55. Substituting uranium-238 with thorium-232 boosts neutron flux and conversion, reducing nuclear proliferation risk. While initial neutron multiplication may not be highest, thorium-232 can produce uranium-233 with high initial neutron multiplication factor. This research aids fuel selection for Indonesia SMR dedieselization program. © Published under licence by IOP Publishing Ltd.

关键词： Thorium

来源：评论

学校读者我要写书评

暂无评论

Bibliometric Analysis: Research Trends in Leaf Image Segmentation and Classification

Bibliometric Analysis: Research Trends in Leaf Image Segment...

引用

2024 International Conference on Artificial Intelligence and Mechatronics System, AIMS 2024

作者： Agustini, Eka Puji Gernowo, Rahmad Kurnianingsih Wibowo, Adi Warsito, Budi Doctoral Program of Information System School of Postgraduated Studies Diponegoro University Semarang Indonesia Doctoral Program of Information System Diponegoro University Semarang Indonesia Master of Applied Science Program Polytechnic Semarang Indonesia Diponegoro University Faculty of Science and Mathematics Department of Informatics Semarang Indonesia Faculty of Science and Mathematics Diponegoro Universitty Department of Statistics Semarang Indonesia

ISBN: (纸本)9798350350524

Exploring various phenomena and issues related to leaf images is paramount, particularly in segmentation and classification of such images. This study employs bibliometric analysis to delve into two overarching themes: The trends in publication and the evolution of publications, along with a keyword-based analysis. The research methodology unfolds in two stages: (1) data collection and (2) analysis. The dataset comprises 1,248 articles sourced from the Scopus database, covering the period from 1988 to 2023. The research findings unveil a noteworthy surge in publication trends, peaking at 231 documents in 2023. An in-depth examination of journal names demonstrates that studies on the segmentation and classification of leaf images are predominantly featured in computer science journals, exemplified by the publication of 589 documents. Furthermore, an analysis of frequently used keywords highlights 'Extraction' as the predominant term, employed a total of 364 times. This underscores that the research focus on leaf image segmentation and classification presents ample opportunities for researchers to delve more profoundly into the subject. © 2024 IEEE.

关键词： Image segmentation

来源：评论

学校读者我要写书评

暂无评论

A Moving Average Genetic Algorithm (MA-GA) for Estimating the COVID-19 Dynamic Based on a Stochastic SIRD Model 8th

A Moving Average Genetic Algorithm (MA-GA) for Estimating t...

引用

8th International Conference on mathematics: Pure, Applied and Computation, ICoMPAC 2023

作者： Putri, Endah R. M. Widianto, Aldi E. W. Hakam, Amirul Tjahjono, Venansius R. Susanto, Hadi Department of Mathematics Sepuluh Nopember Institute of Technology Sukolilo Surabaya60111 Indonesia Master’s Program in Actuarial Science Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Bandung40132 Indonesia Department of Mathematics Khalifa University Abu Dhabi Campus Abu Dhabi United Arab Emirates

ISBN: (纸本)9789819721351

In this study, we examine the transmission of the COVID-19 outbreak using a constructed SIRD stochastic model. To determine the most appropriate model parameters, three stochastic models are proposed, and genetic algorithms (GA) are employed. However, the standard GA has proven inadequate in obtaining suitable parameters for the model, leading to occasional discrepancies in tracking trends from actual case data. To overcome this limitation, we propose a novel modification of the genetic algorithm, termed the Moving Average Genetic Algorithm (MA-GA). Unlike the standard GA, our MA-GA continuously updates the parameters at predetermined intervals, resulting in significantly improved accuracy. By applying this method, we achieve higher precision in providing solutions for the stochastic SIRD model, thereby enhancing its ability to accurately reflect the real-world dynamics of the COVID-19 outbreak. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Determination of the tourist route in Malang Raya by using ant colony optimization 21st

Determination of the tourist route in Malang Raya by using a...

引用

21st IFAC World Congress 2020

作者： Rozidi, A. Anam, S. Habibah, U. Master of Mathematics Study Program Mathematics Department Brawijaya University Indonesia

Malang Raya is one of the most popular tourist destinations in Indonesia and has many interesting tourist attractions. Tourists need much time to visit all the tourist attractions. It is not possible to visit all the tourist attractions since vacation time is limited. Therefore, the method for determining the tourist route with the minimum time and satisfy the constraint is needed. The problem is Vehicle Routing Problem (VRP) and can be solved by meta-heuristic. There are several meta-heuristics that can be used to solve VRP, for example Genetic Algorithm (GA), Particle Swarm Optimization (PSO), and Ant Colony Optimization (ACO). ACO has the advantage of a good positive feedback mechanism when compared to GA and PSO. For this reasons, this paper presents the determination of tourist route in Malang Raya by using ACO. However, ACO tends to solution stagnation. In this paper, the solution stagnation of ACO will be solved by applying the dual pheromone tables. The results show that ACO with dual pheromone tables can solve the problem of determining tourist routes in Malang Raya well in terms of quality of solution because ACO with dual pheromone tables can obtain better results in the time cost of the route than standard ACO. © Published under licence by IOP Publishing Ltd.

关键词： Ant colony optimization

来源：评论

学校读者我要写书评

暂无评论

Modelling of Motion of a Volvox Colony using Many-Body System and Its Qualitative Comparison with Observations 9

Modelling of Motion of a Volvox Colony using Many-Body Syste...

引用

9th Asian Physics Symposium 2021, APS 2021

作者： Dini, Septian Ulan Nurafni, Sevi Fairuza, Achmad Zacky Taufik, Intan Master Program in Physics Faculty of Mathematics and Natural Science InstitutTeknologi Bandung Bandung40132 Indonesia Master Program in Computational Science Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung40132 Indonesia Master Program in Nanotechnology Graduate School Institut Teknologi Bandung Bandung40132 Indonesia School of Life Science and Technology Institut Teknologi Bandung40132 Indonesia

Approximately 500-60,000 volvox cells constructed a colony with a spherical or elliptical hollow form. Each cell can use its flagella to move. For a colony of hundred cells to perform a direct motion, there must be a coordination of the flagella. In this work, we assume that the cells already form the spherical colony and can perform some simple motion types, i.e., translational (TRAN), roll (ROLL), spin (SPIN), and superposition of the motions, and neglect detail of each flagellum. It is possible to map each cell in the colony using angular positions with a constant radius R and different θ _i and φ_i, where i = 1, 2,..., N with N is the number of cells constructing a colony. The center of the colony is R = (x, y, z). The TRAN mode can be obtained, wherex(t) = x(0) + vxt, y(t) = y(0) + vyt, z(t) = z(0) +vzt, ROLLmode with θ(t) = ω(0) + ωθt and SPIN with φ(t) = ω(0) + ωφt. Through the available observation video, the model of volvox colony motion is also shown to have a qualitative agreement. © Published under licence by IOP Publishing Ltd.

关键词： Cells

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：