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Identification of changes in the morphological space structure of Bandar Lampung City using overlay geographic information system analysis

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IOP Conference Series: Earth and Environmental science 2021年第1期739卷

作者： A B Ghazi H A Fitra Citra Persada Urban and Regional Planning Study Program Department of Infrastructure and Regional Technology Institut Teknologi Sumatera Architecture Study Program Department of Architecture Faculty of Engineering University of Lampung

Cities are developing due to population growth, socio-economic structure changes, technology and spatial interaction with its surroundings. 'Bagian Wilayah Kota (BWK) C' or so-called 'urban zone C' of Bandar Lampung municipality comprising districts of Sukarame, Tanjung Senang, and Way Halim is currently growing both internally and externally due to the development of Trans-Sumatera highway and Institute Teknologi Sumatera (ITERA). The dynamics of development and activities have caused a growing physical urban space, affecting the changes of urban structure directly. The current development in BWK C has been considered as unmanageable and potentially caused some problems in spatial plan in the future. To prevent the chaotic of spatial plan in the future, this study aims to identify the changes of urban structure in BWK C of Bandar Lampung municipality due to the internal and external development of its area. This study benefits in providing comprehensive standpoints about the process of urban structure changes based on urban activities so that city government could gain a systematic discourse of urban development which advantages in policymaking for spatial development in Bandar Lampung municipality in the future. This study conducted several analytical methods ranging from comparative analysis, spatial analysis, and hierarchical centrality index analysis. For data collection, this study applied secondary data survey and field work observation, using data from 2010 to 2016. The findings of this study reveal that the physical development in BWK C is getting compacted as its morphology changed from ribbon shaped city to octopus shaped city.

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Analysis of tsunami hazard in the Southern Coast of West Java Province - Indonesia 2

Analysis of tsunami hazard in the Southern Coast of West Jav...

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2nd Maritime science and Advanced Technology: Marine science and Technology in Framework of The Sustainable Development Goals, MSAT 2019

作者： Windupranata, W. Hanifa, N.R. Nusantara, C.A.D.S. Aristawati, G. Arifianto, M.R. Research Group of Coastal Ocean and Maritime Engineering Faculty of Earth Sciences and Technology Institut Teknologi Bandung Indonesia Centre for Earthquake Science and Technology Research Centre for Disaster Mitigation Institut Teknologi Bandung Indonesia Research Laboratory of Hydrography Faculty of Earth Sciences and Technology Institut Teknologi Bandung Indonesia Study Program of Geodesy and Geomatics Engineering Faculty of Earth Sciences and Technology Institut Teknologi Bandung Indonesia

The Southern Coast of West Java Province in the Java Islands is one of prone and exposed area to tsunami hazard. It has about 428 kilometers coastline length, covering 5 administrational regencies (i.e. Sukabumi, Cianjur, Garut, Tasikmalaya, and Pangandaran). It is a strategic area that support many economic activities including tourism, fisheries, electricity power plants, agricultures, markets as well as social factors such as coastal villages, schools and other public facilities. The existence of this strategic area is threatened by the potential for a tsunami disaster mainly from megathrust along the Southern Coast of Java Island. On 2006, a tsunami earthquake of M7.7 occurred off Pangandaran Regency with tsunami height of 5-8 meters and inundated about 500 meters along southern coast of West and Central Java Province. The tsunami caused more than 600 casualties and damage to buildings, public facilities and insfrastructure. Yet, the Indonesia National Earthquake Source and Hazard Map suggest a bigger threat of a plausible M8.7 - M9.2 megathrust earthquake off Java island. This research aims to analyze and map potential areas affected by the tsunami in the South Coast of West Java Province based on numerical modelling carried out with Cornell Multi-grid Coupled Tsunami Model (COMCOT) v1.7 based on the several megathrust earthquake scenarios in southern off West Java. The results of tsunami modelling show that the highest impact is generated in the Sunda Straits & West Java - Central Java Megathrust Scenarios with highest tsunami inundation and the fastest travel time occurred in Cianjur Regency with 26,7 meters height and estimated arrival time of tsunami wave approximately 10 minutes after the mainshock, while the farthest inundation distance is estimated in Sukabumi Regency about 5.8 kilometers from the coast due to existence of river. © Published under licence by IOP Publishing Ltd.

关键词： Hazards

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Multi-perspective review on application of self-healing concrete and its prospect in Asia

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AIP Conference Proceedings 2022年第1期2489卷

作者： Christian Hadhinata Amalina Amira Arini Nurjanna Athalafi Ramadhan Indrasara Nu’matul Hasanah M. Mirza Abdillah Pratama 1Civil Engineering Education Study Program Department of Civil Engineering Faculty of Engineering Universitas Negeri Malang Malang Indonesia 2Biology Study Program Department of Biology Faculty of Mathematics and Natural Science Universitas Negeri Malang Malang Indonesia 3Department of Civil Engineering Faculty of Engineering Universitas Negeri Malang Malang Indonesia

Concrete is the most popular material construction which can be applied in broad construction projects. In addition, concrete is also featured with robust strength, durability, reflectivity, and versatility. However, concrete is prone to rupture that results in decreasing life span and its quality, so it requires additional cost for repair toward its damage. Self-healing concrete is one of the innovations developed by researchers to solve the cracks in concrete allowing the concrete to recover the cracks through the healing process. A self-healing concrete has more superior mechanical properties compared with normal concrete. Self-healing mechanisms can be divided into two types: autogenic and autonomic self-healing. Autogenic self-healing takes advantage of the formation of calcium carbonate crystals from unhydrated cement or mineral particles. Meanwhile, autonomic self-healing uses a healing agent capsulized into microvascular, microencapsulation, and pallets. Researchers applied self-healing concrete on a macro-scale, such as in panel walls, roof slabs, and river floodgates. This paper uses the literature review method to collect the data about self-healing concrete. This study aims to discuss self-healing concrete, its mechanical properties, durability, and analysis of the use of self-healing concrete from multi-perspective disciplines including economy, health and environment, construction, and public policy in Asia’s countries.

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Post-occupancy evaluation based on occupant behavior aspect

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IOP Conference Series: Earth and Environmental science 2021年第1期780卷

作者： Kustiani R P Khidmat Architecture Study Program Faculty of Engineering Universitas Bandar Lampung Indonesia Architecture Study Program Department of Regional and Infrastructure Technology Institut Teknologi Sumatera Bandar Lampung Indonesia

Building performance can be improved by investigating and evaluating previews of occupant behavior. Post-occupancy evaluation (POE) is a design analysis method used to direct and evaluate the physical and social elements of inhabited buildings. In recent years, the Ministry of Public Works and Public Housing grants student dormitory building to several Indonesian universities. In 2017, Institut Teknologi Sumatera (ITERA) Bandar Lampung Indonesia has been granted two of those student facilities. The building has been operated for three years. The student dormitory considered has one type of building that has a high capacity occupation. This research aims to measure user satisfaction and evaluate building facility and its implication to student learning effectively using the POE method, specifically human behavior aspects. During this time, POE is more focused on building physical behavior that includes energy and thermal aspects. In this study, the author tries to raise aspects of human behavior as an essential element supporting the sustainability of the building. The survey conducted using eight variables: territoriality, privacy, interaction, perception, crowdedness, adaptability, durability, and comfortability. This research focuses on measuring only female student dormitories. One hundred eighty-two respondents were involved in the survey. The result shows that the majority of respondents feel quite satisfied with all the variable measure. This finding can be a reference to improve the design consideration for future student dormitory design.

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Assessment of debonding failures in the sandwich plate of stern ramp door of ferry Ro-Ro using k-nearest neighbor algorithm

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AIP Conference Proceedings 2023年第1期2674卷

作者： Safri Adam Tuswan Tuswan Abdi Ismail Achmad Zubaydi Bambang Piscesa Aditya Rio Prabowo Information Technology Study Program Politeknik Aisyiyah Pontianak 78114 Pontianak Indonesia Department of Naval Architecture Institut Teknologi Sepuluh Nopember 60111 Surabaya Indonesia Department of Naval Architecture Universitas Diponegoro Semarang Indonesia Ship Machinery Study Program Faculty of Vocational Studies Indonesia Defense University Belu Indonesia Department of Civil Engineering Institut Teknologi Sepuluh Nopember 60111 Surabaya Indonesia Department of Mechanical Engineering Universitas Sebelas Maret Indonesia Surakarta Indonesia

The difficulty in controlling the proper bonding during manufacturing sandwich for ship structure is a major problem. One of the damage types that often occurs is debonding caused by the lack of the adhesive layer bond between the two faceplate materials and the sandwich core at the centre. Furthermore, the identification of damage in ship structure becomes essential to ensure the structural integrity and security issues. Based on the issues above, damage identification on the sandwich plate of Ferry Ro-Ro with several debonding ratios using the k-NN algorithm was proposed. The cross-validation method was used to check the validity of the proposed algorithm model in practice. The proposed models were analyzed with various k-fold values, k-NN values, and number of iterations to investigate the influence of the those parameters on the accuracy of the model. From the result, it can be found that increasing k-fold value is the best strategy to increase the accuracy of the model. However, increase number of neighbors (k) caused a bias so that the accuracy decreased. The tests resulted in the highest accuracy of 97.60% obtained at k-fold 11 with k=3 and 90 iterations. It can be summarized that the large number of k-folds and small k-NN parameters do not require large iterations to obtain high prediction results.

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Geochemical characterization of thermal water springs in Barasanga field, North Konawe, Southeast Sulawesi

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AIP Conference Proceedings 2023年第1期2595卷

作者： Emi Prasetyawati Umar Jamaluddin Alfian Nawir Muhammad Altin Massinai Muhammad Fauzy Ismullah Massinai Anshariah Mining Engineering Department Faculty of Industrial Technology Universitas Muslim Indonesia Makassar Indonesia Geological Engineering Study Program STT Migas Balikpapan STT Migas Balikpapan Balikpapan Indonesia Geophysics Department Faculty of Math and Natural Science Hasanuddin University Makassar Indonesia

The geochemical method is one of the methods used to know the characteristics of hot spring, and the estimation of subsurface temperature or geothermal reservoir. Analysis of chemical properties of hot springs through thermal chemistry by using trilinear diagram. The methods used are literature study and field observations such as mapping the distribution of hot water spring, titrimetric laboratory analysis, gravimetric, and spectrophotometer for the analysis of hot water spring through the geochemical approach in determining the type of hot water spring. The average temperature of 480C and pH of 7,85, clear color, smelled sulfur and taste salty. The result on the percentage value of the ion content in the hot springs samples that have been analyzed their chemical content, especially the anion content of CI, SO42−, and HCO3− CO32− indicates that hot spring type of Barasanga is a type of chloride. This is indicated by the large chloride ion content ranging from 85.486% to 90.627%.

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A comprehensive approach utilizing quantum machine learning in the study of corrosion inhibition on quinoxaline compounds

Artificial Intelligence Chemistry

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Artificial Intelligence Chemistry 2024年第2期2卷

作者： Muhamad Akrom Supriadi Rustad Hermawan Kresno Dipojono Ryo Maezono Study Program in Informatics Engineering Faculty of Computer Science Universitas Dian Nuswantoro Semarang 50131 Indonesia Research Center for Materials Informatics Faculty of Computer Science Universitas Dian Nuswantoro Semarang 50131 Indonesia Quantum and Nano Technologies Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung 40132 Indonesia School of Information Science Japan Advanced Institute of Science and Technology Ishikawa 923-1292 Japan

In this investigation, a quantitative structure-property relationship (QSPR) model coupled with a quantum neural network (QNN) was used to explore the corrosion inhibition efficiency (CIE) of quinoxaline compounds. Integrating quantum chemical properties (QCP) features reduced computational burden by strategically reducing the features from 11 to 4 while maintaining prediction accuracy. QNN models outperform traditional methods like artificial neural networks (ANN) and multilayer perceptron neural networks (MLPNN), with a coefficient of determination (R 2 ) value of 0.987, coupled with diminished root mean square error (RMSE), mean absolute error (MAE), and mean absolute deviation (MAD) values of 0.97, 0.92, and 1.10, respectively. Predictions for six newly synthesized quinoxaline derivatives: quinoxaline-6-carboxylic acid (Q1) , methyl quinoxaline-6-carboxylate (Q2) , (2 E ,3 E )-2,3-dihydrazono-1,2,3,4-tetrahydroquinoxaline (Q3) , (2 E ,3 E ) 2,3-dihydrazono-6-methyl-1,2,3,4-tetrahydroquinoxaline (Q4) , ( E )-3-(4-methoxyethyl)-7-methylquinoxalin-2(1 H)-one (Q5) , and 2-(4-methoxyphenyl)-7-methylthieno[3,2- b ] quinoxaline (Q6) , show remarkable CIE values of 95.12, 96.72, 91.02, 92.43, 89.58, and 93.63 %, respectively. This breakthrough technique simplifies testing and production procedures for new anti-corrosion materials.

关键词： Quantum neural network QSPR Corrosion inhibition Quinoxaline

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Roof greening in major Chinese cities possibly afford a large potential carbon sink

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science Bulletin 2024年第20期69卷 3216-3220页

作者： Chao Yang Yinghui Zhang Min Chen Song Zhu Yuzhi Tang Zhixin Zhang Wei Ma Huizeng Liu Junyi Chen Bohui Tang Dejin Zhang Zhengdong Huang Xuqing Wang Wei Tu Cuiling Liu Tiezhu Shi Haiying Xu Aihong Cui Fanyi Meng Tianhong Zhao Kai Guo Wenhao Guo Bi Fan Quande Qin Wuyang Hong Haishan Wu Bing Wang Jinrong Zeng Ka Wai Wu Qingquan Li Key Laboratory for Geo-Environmental Monitoring of Great Bay Area Ministry of Natural Resources&Guangdong Key Laboratory of Urban InformaticsShenzhen UniversityShenzhen 518060China School of Architecture and Urban Planning Shenzhen UniversityShenzhen 518060China Key Laboratory of Virtual Geographic Environment Ministry of EducationNanjing Normal UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China Shenzhen Zhiyuan Space Innovation Technology Co. LtdShenzhen 518060China Guangdong Laboratory of Artificial Intelligence and Digital Economy(SZ) Shenzhen 518107China School of Geography and Ocean Science Nanjing UniversityNanjing 210008China School of Geography Nanjing Normal UniversityNanjing 210023China School of Civil Engineering Chongqing Jiaotong UniversityChongqing 400074China Institute for Advanced Study&Shenzhen University Shenzhen 518060China Tiandu-Shenzhen University Deep Space Joint Laboratory Shenzhen UniversityShenzhen 518060China Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China Center for Hydrogeology and Environmental Geology China Geological SurveyBaoding 071051China Department of Landscape Architecture and Urban Planning Texas A&M UniversityTX 77840USA Department of Geography Hong Kong Baptist UniversityHong Kong 999077China College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518060China College of Big Data and Internet Shenzhen Technology UniversityShenzhen 518118China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China College of Management Shenzhen UniversityShenzhen 518060China WeBank(Shenzhen)Co. LtdShenzhen 518060China Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong Kong 100872China Esri C

China is experiencing accelerated urbanisation,with a large number of people moving from rural to urban areas[1].It has resulted in large losses in the net primary production(NPP),biodiversity and carbon stocks and an increase in environmental pollution and CO_(2)emissions[2–4].In 2015,196 countries signed the Paris Agreement and committed to setting long-term goals to jointly manage climate change and reduce their individual emissions,aiming to control the increase in global average temperature from the pre-industrial level to below 2℃and to curtail the temperature rise within 1.5℃till the end of the 21st century[5].China is bolstering its efforts to achieve the climate change mitigation goals and has announced a plan for achieving carbon neutrality by 2060[6].The carbon neutrality goal poses a challenge to the current policies promoting rapid urbanisation across China.

关键词： jointly carbon goals

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Decision Support System to Determine the Student Achievement Scholarship Recipients Using Fuzzy Multiple Attribute Decision Making (FMADM) with SAW 7

Decision Support System to Determine the Student Achievement...

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7th International Conference on Cyber and IT Service Management, CITSM 2019

作者： Kurniawan, Helmi Swondo, Ashari P. Sari, Eka Purnama Ummi, Khairul Yufrizal Agustin, Fhery Faculty of Engineering and Computer Science Universitas Potensi Utama Medan Indonesia English Education Study Program Universitas Potensi Utama Medan Indonesia Manajement Study Program Universitas Potensi Utama Medan Indonesia

ISBN: (纸本)9781728129099

Higher education is an education unit that organizes higher education. College students are called students, while college educators are called lecturers. Higher education as a place of learning and self-development Students provide facilities to improve student achievement in the form of student achievement scholarships. This scholarship program is expected to stimulate students' interest in learning to be better. In determining scholarship recipients, the student division selects prospective scholarship recipients based on existing criteria. In the selection process, the student division has difficulty choosing the data of prospective recipients. Because each type of scholarship criteria and has different criteria weights. Calculation of the value of weighting criteria requires precision. Based on the problems that occur, the author designed a decision support system to determine the recipients of achievement scholarships using the SAW method. This system can help student affairs to carry out criteria for recipients of achievement scholarships based on administrative data of prospective scholarship recipients in determining criteria for weighting value calculations. With this system, it can minimize errors to determine prospective scholarship recipients who excel. After testing the use of support systems for deciding scholarship decisions using the SAW method, it can be concluded that a decision support system can assist the student's part in carrying out their duties. © 2019 IEEE.

关键词： Decision support systems

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Effects of slurry concentration and rotational speeds of drum drier to the characteristics of pregelatinized breadfruit (Artocarpus altilis) flours 1

Effects of slurry concentration and rotational speeds of dru...

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1st International Conference on Mechanical Electronic and Biosystem engineering, MEBSE 2018

作者： Sunarti, T.C. Sinaga, W.S.L. Pandji, C. Department of Agroindustrial Technology Faculty of Agricultural Engineering and Technology Bogor Agricultural University Indonesia Program Study of Food Science Faculty of Science and Technology University of Pelita Harapan Tangerang Indonesia

Breadfruit is one alternative carbohydrate source in Indonesia. However, breadfruit is seasonal and climacteric crops;it should be processed immediately to produce flour. Native breadfruit flour has many limitations since it is difficult to be solubilized and swollen in cold water. The flour is modified physically by pregelatinization to improve its properties. Pragelatinized breadfruit flour can be used as instant food, porridge, and baby food. This research is aimed to investigate the effect of slurry concentration (20 and 30%) of native breadfruit flour and rotational speeds (4, 6 and 8 rpm) of double drum drier to the chemical composition and physico-chemical properties of the pregelatinized flours. The results showed that pregelatinization did not influence to the chemical composition. Pregelatinization of the flour improved the water solubility and swelling power on room (30°C) and hot (70°C) solutions, reduced the freeze-thaw stability, caused partial gelatinization which is monitored by losing the birefringence of starch granule, and darkened the flour. The pregelatinization also reduced the gelatinization temperature and had low final viscosity. Low concentration of slurry and low rotation speed of drum increased the gelatinized part of the flour, which is influenced to the cold and hot water solubility. © Published under licence by IOP Publishing Ltd.

关键词： Solubility

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