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Identification of spatial potential flood-prone area using topographic wetness index under the digital elevation model of Kr. Keureuto watershed, North Aceh. 5

Identification of spatial potential flood-prone area using t...

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5th Aceh International Symposium on Civil engineering 2024, AISCE 2024

作者： Rizalihadi, Maimun Meilianda, Ella Yulianur, Alfiansyah Away, Yuwaldi Doctoral Program Post Graduate Program Syiah Kuala University Banda Aceh Indonesia Civil Engineering Department Syiah Kuala University Banda Aceh Indonesia Electro and Computer Engineering Department Syiah Kuala University Banda Aceh Indonesia

Floods are the most frequent disaster events in Lhoksukon, resulting in significant losses and community and environmental damage. Floods are generated by several factors, consisting of hydrometeorological, topographical, geological, soil, and human activities. Topography is a key controlling factor in flood initiation. Topographic analysis for detecting flood susceptibility, especially flood inundation, can be conducted using the TWI. The research aims to identify the potential spatial distribution of flood-prone areas based on TWI and assess the model accuracy using the ROC-AUC method. A case study was conducted in the Kr. Keureuto watershed. of North Aceh. TWI analysis is based on the topography of an area denoted by extracting DEM using GIS to create slope, flow direction, and flow accumulation. Higher TWI values are associated with higher flood susceptibility. The results show that the value of TWI is approximately 1.571-27.147, showing that more than 20% of area are potentially flood inundations with high and very hight rating of flood susceptibility. Furthermore, based on the analysis using field observation flood is obtained the AUC value of 71,60%. It can be concluded that the spatial model of flood-prone using TWI is good and effective for determining flood prone region in the Kr. Keureuto River basin © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Watersheds

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Influence of Project and Affected Local Community Interests Level on Social Conflicts in Indonesian Infrastructure Projects

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International Journal of engineering, Transactions A: Basics 2022年第7期35卷 1217-1226页

作者： Sanggoro, H.B. Alisjahbana, S.W. Mohamad, D. Civil Engineering Doctoral Program University of Tarumanagara Jakarta Indonesia

Poor economic growth due to Covid-19 pandemic in the last two years has resulted in a decline in indicators of public welfare. The construction industry sector also experienced a severe decline in productivity;thus, adjustments had to be made to survive the crisis situation. In addition, environmental problems due to development activities also threaten the lives and incomes of people who depend on natural products. These conditions encourage the escalation of interests that affect infrastructure projects in Indonesia. This study aimed to predict the influence of project and affected local community's interests on infrastructure projects social conflicts. Data were obtained by questionnaire from 68 project managers as respondents and analyzed using PLS-SEM. The findings of this study are that the influence of affected community is more dominant than that of project interests on project social conflicts. This shows the important role of communities in the concept of sustainable development with environmental and social perspectives. The results of this study will be useful in drafting the concept of an integrated and standardized environmental and social safeguard framework. To achieve an appropriate framework, further research is needed to examine the framework concept as a moderation of the relationship between interests and project social conflicts. © 2022 Materials and Energy Research Center. All rights reserved.

关键词： Construction industry

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Support vector machine and neural network algorithm approach to classifying facial expression recognition 5

Support vector machine and neural network algorithm approach...

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5th International Conference on Informatics and Computing, ICIC 2020

作者： Fatchan, Muhamad Hery Purnomo, Mauridhi Affandy Zainul Fanani, Ahmad Marlinda, Linda Doctoral Program of Computer Science Universitas Dian Nuswantoro Semarang Indonesia Institut Teknologi Sepuluh Nopember Computer Engineering Department Surabaya Indonesia

ISBN: (纸本)9781728180472

One of the obstacles to detecting facial emotions is the lack of analysis in the process of emotional expression on human faces based on a photo camera. Identifying features and implementing different feature combinations can improve accuracy, in most cases. Trial detection through the use of feature vectors with higher dimensions that contain facial emotions can provide a lot of information on the accuracy of the data. The purpose of this study is to determine the highest accuracy results from the comparison of Support Vector Machine and Neural Network Algorithms. It can be seen that the Support Vector Machine has the highest accuracy value, which is 87%, while the Neural Network algorithm only has an accuracy of 85%. The results of the ROC Curve show that the Support Vector Machine achieves the best AUC value, namely 0.97. Comparison between Neural Network algorithm and Support Vector Machine for prediction of emotions using data types with many variations of emotions including anger, sadness, happy and surprise. The Support Vector Machine method is an accurate algorithm and this method is also very dominant over other methods. Based on the Accuracy, AUC, and T-test method, this method falls into the best classification. © 2020 IEEE.

关键词： Face recognition

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6th International Conference on Complex Medical engineering, CME 2012

作者： Hirayama, Taichi Shoji, Hiroaki Ozaki, Hisaki Doctoral Program of Science and Engineering Ibaraki University Hitachi Ibaraki Japan Laboratory of Physiology College of Education Ibaraki University Mito Ibaraki Japan

ISBN: (纸本)9781467316163

Audio-visual neural interaction was examined by using ERPs. Eleven male volunteers participated in this study. EEGs were recorded from 19 locations. Japanese vowels (/a/ or /i/) or white-noise (/noise/) were used as auditory stimuli. The face images pronouncing vowel ([a] or [i]) were used as visual stimuli. This study was composed of three conditions, i.e., (1) audio-visual condition (AV condition) due to bimodal stimulus presentation, (2) auditory condition (A condition) due to only auditory stimulus presentation, and (3) visual condition (V condition) due to only visual stimulus presentation. In the AV condition, audio-visual stimuli pairs were phonetically congruent (audio/a/, visual[a]), incongruent (audio/a/, visual[i]), and deviant (/noise/, visual[a]). The participants were instructed to press a button for vowel/a/ or /noise/ stimulus. Audio-visual interaction was examined by subtracting ERPs in the A or V condition from ERPs in the AV condition. Cross-modal facilitatory effects were not observed in auditory perception. On the other hand, topographical changes occurred in face-specific negative components around 170 ms depending on audio and visual informational congruency, i.e., the center of negative activity shifted towards the left hemisphere for "incongruent" stimulus. This result might be concerned with suppression of incongruent visual information. © 2012 IEEE.

关键词： White noise

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The Population Growth and Carrying Capacity in Semarang City 2

The Population Growth and Carrying Capacity in Semarang City

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2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Hariyanto Hadi, Sudharto P. Buchori, Imam Doctoral Program at Environment Science Post Graduate School Diponegoro University Indonesia Department of Urban Plannung Engineering Faculty Diponegoro University Indonesia

Population growth and development of city activities take some lands to carry them. As a result, land use competition happens among persons, society or sector. Land necessity for settlement, industry, or sector has taken over farm land, therefore farm land has been converted intensively and massively. Chronologically, population growth will cause land necessity increase. Unproductive land, especially farm land will be converted. Furthermore, farm land conversion will cause carrying capacity change. Carrying capacity has certain bio capacity. With the population growth, it will increase resource consumption;on the other side, farm land conversion will decrease carrying capacity. The objective of the study is to know about the influence of population growth towards carrying capacity (bio capacity) in Semarang city. Land consumption per capita is indeed influenced by city population, the higher the population is, the lower the land consumption per capita. With the population growth, it will influence carrying capacity. Carrying capacity here is the ratio of area to population. Analytical descriptive method is applied in the study with all sub-districts in Semarang city as the analysis unit. Population here is sub-district area and population per sub-district in Semarang city. Population growth data period is from 2000 until 2015. Main variables of the study are area per sub-district, population, population growth, carrying capacity. Result of the study shows significant influence of carrying capacity decrease, especially some outskirts in Semarang city. This condition happens because the outskirts in Semarang city tend to have dense population growth. Range of carrying capacity in Semarang city is from 0,007 to 0,117 of 0 to 1. Almost all sub-districts in Semarang city show miserable condition, except Mijen and Tugu. The conclusion of the study is that population will decrease carrying capacity. Therefore, the government should control population growth by paying atten

关键词： Population statistics

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Adversarial Search Algorithms Performance in the Yote Game 25

Adversarial Search Algorithms Performance in the Yote Game

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2022 IEEE International Conference on Automation/25th Congress of the Chilean Association of Automatic Control, ICA-ACCA 2022

作者： Torres, Luis I. Barriga, Nicolas A. University of Talca Doctoral Program in Engineering Systems Faculty of Engineeering Campus Curicó Chile University of Talca School of Videogames Development and Vr Engineering Faculty of Engineering Campus Talca Chile

ISBN: (纸本)9781665494083

The performance of several adversarial search algorithms is very dependent on the move generation and ordering procedure, as well as on the transposition table characteristics. In this work we compare Alpha-beta, MTD-f and NegaScout performance in the presence and absence of the following features: transposition table, Hash Move heuristic and move ordering using the evaluation function. We found that NegaScout did not yield major improvements over Alpha-Beta, which is likely due to the move ordering performed using a weak evaluation function. In most cases, MTD-f examines fewer nodes, and completes fixed depth searches in less time than Alpha-beta and NegaScout. This is consistent with the literature when using coarse grained evaluation functions. Finally, we found that enabling move ordering leads to fewer nodes examined than enabling the Hash Move heuristic, but, as sorting is time consuming, search is slower. Best results overall are found using MTD-f with all enhancements enabled. These results, in a previously unexplored game, are consistent with existing literature. This enables us to make predictions of algorithm and heuristics' performance in novel games, based on an analysis of the games' features, without having to implement all techniques. © 2022 IEEE.

关键词： Function evaluation

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Channel Modeling for 6G Communications: A Survey

Channel Modeling for 6G Communications: A Survey

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2021 International Conference on Computer System, Information Technology, and Electrical engineering, COSITE 2021

作者： Walidainy, Hubbul Adriman, Ramzi Away, Yuwaldi Nasaruddin, Nasaruddin Univerisity of Syiah Kuala Doctoral Program School of Engineering Banda Aceh Indonesia Univerisity of Syiah Kuala Dept. Electrical and Computer Engineering Banda Aceh Indonesia

ISBN: (纸本)9781665425094

The development of communications technology is overgrowing, making disseminating information so fast, widespread, and massive. A network of communication systems starting from the first generation to the current sixth-generation (6G). Fifth-generation communication systems have been implemented in several places in the world today. However, research continues to develop the sixth-generation communication system. This paper aims to survey and design a channel modeling for a 6G communication system. Moreover, the channel model has also simulated the system in Banda Aceh city as a case study, using the NYUSIM simulator. In this paper, the channel model is considered in the form of Urban Microcell (Umi) and Line of Sight (LOS) with a frequency of 90 GHz. Based on the simulation, this paper found that the path loss value is 124.7 dB, and the received power is -45.5 dBm. The simulation result has also shown that the maximum distance from the transmitter to the receiver for 6G communication is 123.5 m with a delay of 6.4 ns on directional power delay profile (PDP). While on omnidirectional PDP, the delay is 21.9 ns. Thus, the resulting attenuation is relatively high for 6G communication systems due to high rainfall in Banda Aceh. © 2021 IEEE.

关键词： Surveys

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Optimization of Struvite Batch Crystallization Reactor for Recovery Process from Urea Fertilizer Plant Wastewater 2nd

Optimization of Struvite Batch Crystallization Reactor for R...

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

作者： Ulfa, R. Machdar, I. Suhendrayatna, S. Yunardi, Y. Doctoral Program School of Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia

ISBN: (纸本)9789811607356

The present paper reports removal of ammonium nitrogen concentration from a urea fertilizer plant wastewater through struvite crystal (NH4MgPO4.6H2O) formation. The aim of this research was to obtain the optimum conditions of mole ratio, pH value, and crystallization time in NH4+–N recovery by producing slow release fertilizer material (struvite crystal). In this work, a source of Mg and P was magnesium chloride (MgCl2) and potassium dihydrogen phosphate (KH2PO4) solution, respectively. Experiment was designed in a batch crystallizer-reactor at different mole ratio of Mg2+, NH4+, and PO43−. The reactor volume was 500 ml equipped with an agitator. The study was conducted at a room temperature. The effect of Mg2+:NH4+ :PO43− mole ratio was studied, it was found that at a molar ratio of Mg2+:NH4+ :PO43− (1:1:1) and pH of 9, the ammonium removal was obtained around of 90.48%. Recovery for NH4+ increased with increasing Mg2+ concentration. The removal achieved around 93.66% at the ratio Mg2+:NH4+ :PO43− of 1.2:1:1. Moreover, the obtained struvite crystals were analyzed using a SEM to indicate that the shape and the size of struvite crystal. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Shape Effects on Shear Behavior of Superdisk Systems Studied by Level Set Discrete Element Method 6th

Shape Effects on Shear Behavior of Superdisk Systems Studied...

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6th International Conference on Advances in Civil engineering, ICACE 2022

作者： Jiang, Haoran Kawamoto, Reid Matsushima, Takashi Doctoral Program in Engineering Mechanics and Energy University of Tsukuba Tsukuba Japan Independent Scholar Tsukuba Japan Department of Engineering Mechanics and Energy University of Tsukuba Tsukuba Japan

ISBN: (纸本)9789819938254

This paper investigates the shear behavior of superdisk particles using the 2D level set discrete element method (LS-DEM). Specifically, dense samples of various superdisk shapes (blockiness in [2, 4]) were prepared through isotropic compression tests, and the prepared samples were then subjected to simple shear tests under different shearing speeds. We find the following. Firstly, it is observed that the final compression state is strongly influenced by the particle shapes. Larger surface blockiness leads to more ordered packing structures, resulting in higher solid fractions and mean coordination numbers in larger values of n. Secondly, the quasi-static shear response shows significant differences for different values of n. The stress ratios q/p and solid fractions in the peak and critical state increase monotonically with all blockiness values explored. Finally, the study tests the constitutive rheological model of steady flows, and the findings indicate that (Forumala presented). relations can be well captured by power-law functions for all samples. Furthermore, the fitted exponents are found to be nearly independent of the shape of the samples. The results of this study provide deeper insights into the particle shape effects on granular materials. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Numerical methods

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A Real-time Affordance-based Object Pose Estimation Approach for Robotic Grasp Pose Estimation

A Real-time Affordance-based Object Pose Estimation Approach...

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2023 International Conference on System Science and engineering, ICSSE 2023

作者： Wong, Shang-Wen Chiu, Yu-Chen Tsai, Chi-Yi Tamkang University Doctoral Program in Robotics College of Engineering New Taipei City Taiwan Tamkang University Department of Electrical and Computer Engineering New Taipei City Taiwan

ISBN: (纸本)9798350322941

This paper proposes a pose estimation system for robot grasping based on a novel Object Affordance Detection and Segmentation (OADS) network. The proposed system consists of four modules: (1) OADS network;(2) point cloud extraction;(3) object pose estimation;(4) grasp pose estimation. Based on the OADS network, the proposed system achieves affordance-based object pose estimation results. The proposed grasp pose estimation system is evaluated on a laboratory-made dual-arm robot. Experimental results show that the proposed system achieves high detection rate and high accuracy in affordance detection and segmentation tasks, leading to a high success rate in object grasping tasks with lab-made dual-arm robot. © 2023 IEEE.

关键词： Object detection

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