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3rd International Conference on Applied Sciences Mathematics and Informatics, ICASMI 2020

作者： Utami, B.H.S. Fitriani Usman, M. Warsono Daoud, J.I. Doctoral Program of Mathematics and Natural Science Faculty of Mathematics and Natural Science University of Lampung Bandar Lampung Indonesia Department of Information System Stmik Pringsewu Pringsewu Indonesia Department of Science and Engineering Faculty of Engineering International Islamic University Malaysia P.O. Box 10 Kuala Lumpur50728 Malaysia

The notion of the sub-exact sequence is the generalization of exact sequence in algebra especially on a module. A module over a ring R is a generalization of the notion of vector space over a field F. Refers to a special vector space over field F when we have a complete inner product space, it is called a Hilbert space. A space is complete if every Cauchy sequence converges. Now, we introduce the sub-exact sequence on Hilbert space which can later be useful in statistics. This paper aims to investigate the properties of the sub-exact sequence and their relation to direct summand on Hilbert space. As the result, we get two properties of isometric isomorphism sub-exact sequence on Hilbert space. © Published under licence by IOP Publishing Ltd.

关键词： Hilbert spaces

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STATISTICAL ISSUES AND PROBLEMS IN GROUND-WATER DETECTION MONITORING AT HAZARDOUS-WASTE FACILITIES

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GROUND WATER MONITORING AND REMEDIATION 1988年第4期8卷 135-150页

作者： MCNICHOLS, RJ DAVIS, CB Roger J. McNichols is a professor of industrial engineering at the University of Toledo (Department of Industrial Engineering University of Toledo Toledo OH 43606). After receiving his Ph.D in industrial engineering from The Ohio State University he joined the faculty of Texas A and M University where he directed the Maintainability Engineering Graduate Program at Red River Army Depot. At UT he has served as associate dean of engineering and as chairman of the Systems engineering doctoral program. His research and consulting interests include reliability quality control manufacturing mathematical modeling and applied statistics. Charles B. Davis is an associate professor of mathematics at the University of Toledo (Department of Mathematics University of Toledo Toledo OH 43606). After receiving his M.S. in mathematics and statistics and his Ph.D. in statistics from the University of New Mexico he joined the Mathematics Department at UT where he established the graduate program in statistics. His research and consulting interests include statistical modeling statistical computation simultaneous inference and data analysis.

Ground water monitoring presents interesting statistical challenges, including controlling the risk of entering compliance monitoring, incorporating all modes of inherent variability into the statistical model on which tests are based, and taming the detection limit problem, all while maintaining demonstrable sensitivity to real contamination. Some of these challenges exceed textbook statistics considerably, even when considered alone, and good solutions are scarce. When these challenges are combined, the task of developing good statistical procedures or good regulations can be formidable. This article presents a number of realities of ground water monitoring that should be considered when developing statistical procedures. Recommendations made for addressing these realities include the following: (1) the false positive rate should be controlled on a facility-wide basis, rather than per well or per parameter as required in the proposed regulation (40 CFR §264); (2) multiple comparisons with control procedures are preferable to analysis of variance (ANOVA) for controlling the overall false positive rate; (3) retests can be made an explicit part of the statistical procedure in order to increase power and decrease sensitivity to distribution shape assumptions; (4) commonly used simple methods of handling below detection limit data with parametric tests, including Cohen's procedure as implemented in the U.S. EPA's Technical Enforcement Guidance Document (TEGD), should probably be avoided; (5) the statistical properties of practical quantitation limits for non-naturally occurring compounds should be studied carefully; and (6) so long as the facility-wide false positive rate is controlled, better sensitivity to real contamination is obtained by monitoring fewer well-chosen parameters at a smaller number of well-chosen locations. An evaluation of the proposed revised §264 regulation with respect to these realities reveals that it seems to be a definite improvement over the

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A Study on Text Feature Selection Using Ant Colony and Grey Wolf Optimization 7

A Study on Text Feature Selection Using Ant Colony and Grey ...

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7th International Conference on Informatics and Computing, ICIC 2022

作者： Widians, Joan Angelina Wardoyo, Retantyo Hartati, Sri Universitas Gadjah Mada Doctoral Program Dept. of Computer Science and Electronics Indonesia Universitas Mulawarman Faculty of Engineering Dept. of Informatics Samarinda Indonesia Universitas Gadjah Mada Faculty of Mathematics and Natural Sciences Dept. of Computer Science and Electronics Yogyakarta Indonesia

ISBN: (纸本)9798350345711

Text classification (TC) is widely used for organizing digital documents. The issues in TC are numerous characteristics and high-element dimensions. Many pattern classification issues require feature selection (FS), which is pertinent. FS removes unneeded and redundant data from the dataset. The Ant Colony Optimization (ACO) and Grey Wolf Optimizer (GWO) for FS are the main topics of our thorough assessment of the literature on the Swarm Intelligence (SI) algorithm. Furthermore, it illustrates how the hybrid SI technique is used in FS across various sectors. The hybrid SI technique uses applicable data from various FS methods to find feature subsets with smaller sizes and better classification performance than those found by regular FS algorithms. © 2022 IEEE.

关键词： Ant colony optimization

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Experimental investigation of a cold storage box with Aceh locally produced hydrated salt as phase change materials: Effect of salt treatment 3

Experimental investigation of a cold storage box with Aceh l...

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3rd International Conference on Natural and Environmental Sciences 2019, ICONES 2019

作者： Gunawati Noor, N. Sebayang, K. Setiawan, A. Doctoral Program in Physics Faculty of Mathmatics and Natural Sciences Universitas Sumatera Utara Padang Bulan Medan20155 Indonesia Department of Physics Faculty of Mathmatics and Natural Sciences Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikussaleh Bukit Indah Lhokseumawe24352 Indonesia

This investigation aims to study heat transfer rates and temperature changes within a 5 litter cold box enveloped with water-salt solution as phase change material (PCM). The study begins with design and fabrication of a cold box followed by performance tests. Salt sample was collected from a traditional producer in Aceh Besar District, Indonesia. In order to understand the effect of pre-treatment, some of samples were heated at 400 and 600°C for 30 min and compare it with those untreated. Salt solution of each samples was prepared by adding 10 wt.% of salt into water and filled into eight PCM bottles. PCM charging procedure was performed in a refrigerator for 12 h. By placing eight bottle of PCM into the cold-box, thermal energy discharging process was monitored by using four thermocouples. The changes in temperature were recorded for eight hours. In general, result shows that pre-treatment of salt results in a positive effect on thermal energy storage capacity. The best performance of cold storage system was exhibited by PCM made of salt treated at 600 °C where the rate of temperature change within eight hours experiment is 0.055 °C/min. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Phase change materials

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Design and Calibration of Temperature Monitoring Device for a Cold Box with Hydrated Salts as Phase Change Material (PCM) 2nd

Design and Calibration of Temperature Monitoring Device for ...

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2nd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2020

作者： Gunawati Nasruddin, M.N. Setiawan, Adi Sebayang, K. Makruf, A. Zakaria Doctoral Program in Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Padang Bulan Medan20155 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikussaleh Bukit Indah Lhokseumawe24352 Indonesia

ISBN: (纸本)9789811607356

Development of Phase Change Material (PCM) for cold storage application requires devices for monitoring the changes in temperature during the charging and discharging processes. This device helps to understand the behaviour of PCM during the solidifying-liquefying process and predicts how long PCM can store the energy. The aims of this study were to design and prepare a temperature monitoring system using DS18B20 sensors for recording and displaying the temperature changes at six points within a box cooled by salt hydrate PCM. Thermistor types were used as temperature gauges due to their lower prices and flexibility. Six DS18B20 sensors were programmed with Arduino Uno as microcontroller. Output temperature measurement values in degrees Celsius were stored in a computer using PLX-DAQ software. Calibration of temperature measurement was performed by comparing the measurement results of the DS18B20 sensor and a commercial thermometer data logger using the Root Mean Square Error (RMSE) method. Results show that the first DS18B20 sensor was RMSE 1.75, the second sensor was 0.98, the third sensor was 1.2, the fourth sensor was 1.21, the fifth sensor was 1.24, and the sixth sensor was 1.7. The changes in temperature measured by the DS18B20 sensor were successfully recorded for three days without any interruption. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Design of a Multilingual Translation System with Personalized Voice Characteristics 21

Design of a Multilingual Translation System with Personalize...

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21st International System-on-Chip Design Conference, ISOCC 2024

作者： Chen, Chen-Hua Lai, Guan-Yu Lee, Chuan Wu, Chang-Yu Liu, Kuan-Lin Lai, Shin-Chi Doctoral Degree Program in Smart Industry Technology Research and Development Huwei Taiwan National Formosa University Dept. of Automation Engineering Huwei Taiwan National Yunlin University of Science and Technology Dept. Electronics Engineering Douliu Taiwan National Formosa University Dept. Automation Engineering Smart Machinery and Intelligent Manufacturing Research Center Huwei Taiwan

ISBN: (纸本)9798350377088

This study combines AI voice synthesis with IoT to create a real-time multilingual translation system. Front-end devices capture the speaker's voice, which is then played back in both original and translated forms, enabling consecutive interpreting. This system is ideal for multilingual scenarios. After digitization, audio signals undergo speech-to-text conversion, multilingual translation, and text-to-speech processing. Speech synthesis matches the speaker's voice characteristics, allowing listeners to hear the translation in the speaker's voice. Both voice-to-text conversion and translated audio playback use Wi-Fi for data transmission, facilitating future applications. In validation, the average translation and transmission time for each speech segment were 410 ms and 3.38 s, respectively. The synthesized voice similarity analysis achieved an accuracy of 88%, showcasing the method's potential for system integration and development. © 2024 IEEE.

关键词： Wi-Fi

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Develop learning methods imr (integrated material realistic) alternative mathematics learning during a pandemic 7

Develop learning methods imr (integrated material realistic)...

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7th International Conference on Mathematics, Science, and Education 2020, ICMSE 2020

作者： Rusmana, I.M. Zainuri Wardono Nulhakim, A.L. Doctoral Program Universitas Negeri Semarang Indonesia Department of Mathematic Education Faculty of Mathematics and Natural Science Universitas Indraprasta Pgri Jakarta Indonesia Department of Mathematic Education Faculty of Mathematics and Natural Science Universitas Negeri Semarang Indonesia Department of Informatics Engineering Faculty of Engineering and Computer Science Universitas Indraprasta Pgri Jakarta Indonesia

The learning methods used by teachers in schools in Serang City are very ineffective, especially during the pandemic. This is because not integrated content of material in one subject with other subjects. Never mind between subjects, sometimes the material is not well integrated. The purpose of this study is to provide an alternative learning method during a pandemic, namely a method that integrates material with the realities of life which is abbreviated as IMR (Integrated Realistic Material). The method in this research is Research and Development (RnD) with the ADDIE model. In making this learning method according to the stages from the ADDIE study. The results of this study are in the form of learning methods that are integrated with the realities of life during the pandemic. © Published under licence by IOP Publishing Ltd.

关键词： Learning systems

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A caching scheme for dynamic location management in PCS networks

A caching scheme for dynamic location management in PCS netw...

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IEEE Conference on Vehicular Technology (VTC)

作者： Chang Woo Pyo Jie Li Hisao Kameda Doctoral Program System & Information Engineering University of Tsukuba Ibaraki Japan Institute of Information Science & Elelctronics University of Tsukuba Ibaraki Japan

ISBN: (纸本)0780379543

This paper addresses caching for location management in personal communication service (PCS) networks. Caching is useful to reduce the delay of locating frequently retrial calls to a mobile user. However, the cached information may be obsolete due to the mobility of mobile users, which is the reason for the degradation of system performance. We introduce an efficient caching scheme for dynamic location management to improve the location management performance. Moreover, we establish an analytical model and perform a performance evaluation to study the performance improvement of the caching scheme over the non-caching scheme. We provide a simple and direct way of caching based on dynamic location management.

关键词： Intelligent networks Personal communication networks Databases engineering management Cities and towns Degradation System performance Systems engineering and theory Information science Delay

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Evaluation on performance of cold storage box enveloped with phase change materials 1

Evaluation on performance of cold storage box enveloped with...

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1st International Seminar on Science and Technology 2018, ISST 2018

作者： Gunawati Dongoran, A.H. Setiawan, A. Department of Physics Faculty of Mathematics and Natural Sciences Syiah Kuala University Darussalam Banda Aceh23111 Indonesia Mechanical Engineering Department Faculty of Engineering Malikussaleh University Bukit Indah Lhokseumawe24352 Indonesia Doctoral Program of Physics Faculty of Mathematics and Natural Sciences University of Sumatera Utara Padang-Bulan Medan20115 Indonesia

Retailing temperature-sensitive-products such as sausages, milk, fishes, poultry, etc. requires extra energy for cooling. It is necessary to develop an-energy-efficient-design of cold storage box to preserve these products during transportation and retailing. This research aims to study the heat flow, temperature distribution and temperature changes within a 5 litter cold box featured by phase change material (PCM). The study begins with design and fabrication of cold box followed by testing and evaluation using computational fluid dynamics (CFD) simulation. As energy storage, there are four models of 300 ml plastic-bottle filled with PCM i.e (i) plain bottles without holes and grooves, (ii) bottles with one hole, (iii) two-holes bottles with curvatures, and (iv) bottles with four holes without curvatures. There are two type of PCM was prepared to observe the temperature changes in the box, 100 % H2O and 10 vol.% NaCl in H2O. Experimental results show that adding 10 vol.% of NaCl enhances the effectiveness of energy discharging by 73% compared with pure water. CFD simulation explains in detail the temperature distribution and heat flow pattern of each PCM bottles types highlighting an important influence of the shape and number of holes on the rate of heat flow. The best performance of cold box is exhibited by 10% NaCl in H2O filled into plain bottle. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Sodium chloride

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Fuzzy Fusion for Affective State Assessment in Distance Learning Based on Image Detection

Fuzzy Fusion for Affective State Assessment in Distance Lear...

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2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)

作者： Kuoan Hwang Chiahao Yang Department of Computer Science and Information Engineering & Graduate Institute of Networking and Co Graduate Institute of Informatics Doctoral program Chaoyang University of Technology

Distance learning is a learning style that can overcome the limitation of time and space. Because of the distance, teachers can not handle the student's learning situation, and they do not know whether the student is attentive, drowsy or absent. If teachers can know the student's affective state, they can overcome the difficult. The research applies the image recognition technologies to capture the face images of students when they are learning and analyzes their face features to evaluate the student's affective state by Fuzzy Integral. Finally, teachers can monitor the student's behavior by the detection results on the system interface.

关键词： Distance learning Skin Computers Distance measurement Face Image color analysis Education

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