Indonesian Journal of Science and Technology最新文献_第9页

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.15807

Melani Mediayani, Yudi Wibisono, L. Riza, A. Pérez

{"title":"Determining Trending Topics in Twitter with a Data-Streaming Method in R","authors":"Melani Mediayani, Yudi Wibisono, L. Riza, A. Pérez","doi":"10.17509/IJOST.V4I1.15807","DOIUrl":"https://doi.org/10.17509/IJOST.V4I1.15807","url":null,"abstract":"Trending topics in Twitter is a collection of certain topics that are widely discussed by users. This study aims to design a model and strategy for finding trending topics from data streams on Twitter. The research approach was carried out in four stages, namely twitter data collection, preprocessing data, data analysis with sequential K-Means clustering and information processing. Sequential K-Means is used because it can receive input data sequentially and the cluster center can be updated. Testing of the model is carried out in three scenarios where each scenario is distinguished between the amount of data, time and parameter values. After that, evaluation of the results of clustering will be done using the Dunn Index method. Trending topics twitter application were created using the R language and produce output in the form of histograms. There are five topics being the trending topics in New York before the new year. The topic of \"Times\" relates to the presence of a new year's celebration night concert in Times Square. The \"Hours\" topic deals with the calculation of time and seconds towards 2017. \"Eve\" and \"Party\" topics relate to celebrations and the topic \"Resolution\" relating to hope and change for New Yorkers in in 2017.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84261188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Advanced Green Technologies Toward Future Sustainable Energy Systems 面向未来可持续能源系统的先进绿色技术

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.15805

M. Aziz

{"title":"Advanced Green Technologies Toward Future Sustainable Energy Systems","authors":"M. Aziz","doi":"10.17509/IJOST.V4I1.15805","DOIUrl":"https://doi.org/10.17509/IJOST.V4I1.15805","url":null,"abstract":"Currently, the usable energy is basically harvested from the fossil energy sources, including coal, oil, and gas, which are believed to harm the environment due to the emitted GHGs. The awareness to the climate change and limited reserve of fossil energy sources has led to a strong motivation to develop a new energy system which can facilitate three important pillars: security, clean environment, and economic opportunity. This future energy system is strongly expected to be able to blend both fossil and renewable energy sources, while minimize its environmental impacts. To realize it, the primary energy sources are converted to the efficient secondary energy sources, including electricity and hydrogen. These two kinds of secondary energy source are considered very promising in the future, following a high demand in many sectors. In transportation sector, both electricity and hydrogen are believed to become the future fuels as the deployment of electric and fuel cell vehicles is increasing rapidly. In this paper, several potential technologies to produce the energy cleanly from primary energy sources are introduced and evaluated. In addition, clean and efficient technologies in storage and utilization are also described.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87094355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Utilization & Quality of Information System for Administration Services Based on ICT In Patehan, Kraton, Yogyakarta 基于ICT的管理服务信息系统的利用与质量

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.12680

A. A. Rohmah, R. Rachmawati

{"title":"Utilization & Quality of Information System for Administration Services Based on ICT In Patehan, Kraton, Yogyakarta","authors":"A. A. Rohmah, R. Rachmawati","doi":"10.17509/IJOST.V4I1.12680","DOIUrl":"https://doi.org/10.17509/IJOST.V4I1.12680","url":null,"abstract":"Development of technology and application of e-government at city, sub-district, and village become the factor of emergence of Information and Communication Technology-based information service system innovation. Yogyakarta has implemented e-government as one of the strategies used to achieve the slogan of Yogyakarta Smart City. One of the areas that have implemented the concept is Patehan, Kraton, Yogyakarta. This research aims to describe the system of online administrative services, identify of utilization by the community, and measure the quality of its services. The research method used was qualitative and quantitative methods. Data collected are primary data and secondary data with analytical technique used is descriptive qualitative and quantitative. Based on the results of the research can be seen that the administrative service system in Patehan (SiWarga Patehan) is a system made by citizens, for citizens, and from citizens to take care of online certificate from RT, RW until the village that serve as one alternative for the community has high mobility. Based on 60 respondents, it can be concluded that the administrative system of SiWarga Patehan included into the category of good with the service index of 79.97.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90552083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Harvesting Cooling Effect on LPG-Fueled Vehicles for Mini Cooler: A Lab-Scale Investigation 用于小型冷却器的液化石油气燃料汽车的收集冷却效果:实验室规模的研究

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.12834

M. Setiyo, N. Widodo, B. Purnomo, S. Munahar, Muhammad Andi Rahmawan, A. Luthfi

引用次数: 5

Meta-analysis of Student Performance Assessment Using Fuzzy Logic 基于模糊逻辑的学生成绩评价元分析

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.15804

N. Amelia, A. Abdullah, Y. Mulyadi

引用次数: 27

Process Simulation on Fast Pyrolysis of Palm Kernel Shell for Production of Fuel 棕榈仁壳快速热解生产燃料的过程模拟

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.15803

Mangala Nayaggy, Z. Putra

引用次数: 7

How to Read and Interpret FTIR Spectroscope of Organic Material 如何解读有机材料的FTIR光谱

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.15806

A. Nandiyanto, R. Oktiani, R. Ragadhita

引用次数: 884

Carbon Nano Fibre Reinforcements In Concrete 混凝土中的碳纳米纤维增强材料

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.4140

M. S. Awan, Arshad Ali, Perviz S, Yousaf S Awan

引用次数: 4

Identifying the Factor that Promotes Vertical Partner-ships: Empirical Evidence from Tier-1 and Tier-2 Compa-nies in Jabodetabek-Indonesia 识别促进垂直伙伴关系的因素:来自印度尼西亚jabodetabek的一级和二级公司的经验证据

Indonesian Journal of Science and Technology Pub Date : 2019-03-07 DOI: 10.17509/IJOST.V4I1.14427

D. Syah

{"title":"Identifying the Factor that Promotes Vertical Partner-ships: Empirical Evidence from Tier-1 and Tier-2 Compa-nies in Jabodetabek-Indonesia","authors":"D. Syah","doi":"10.17509/IJOST.V4I1.14427","DOIUrl":"https://doi.org/10.17509/IJOST.V4I1.14427","url":null,"abstract":"Indonesian automotive sector played an important role to Indonesian GDPs; it contributes 28% in manufacturing composition. The goal of this research is to examine the vertical partnership between tier-1 and tier-2 automotive component companies in Jabodetabek, Indonesia, as concerns technology transfer, technical exchange, government role, and supplier performance. 93 companies, consisting of 59 tier-1 companies and 34 tier-2 companies became respondents in this study. The research was conducted by visiting sites and interviewing companies, based on Likert-scale questionnaires. Interviewees were persons at the middle management level or higher who understood or were responsible for measuring product quality (purposive sampling). The results of questionnaires were proceeded and analyzed by Structural Equation Model Partial Least Square (SEM-PLS) path modeling using smart-PLS 3.2.7 software. The results showed that there is a significant relationship between the government’s role and technology transfer, as well as between technology transfer and supplier performance improvement. However, there was no significant relationship between government role and supplier performance improvement, nor between technical exchange and supplier performance improvement.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87880552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Limitation in Fabricating PSf/ZIF-8 Hollow Fiber Membrane for CO2/CH4 Separation 制备用于CO2/CH4分离的PSf/ZIF-8中空纤维膜的局限性

Indonesian Journal of Science and Technology Pub Date : 2018-08-30 DOI: 10.17509/IJOST.V3I2.12757

N. Nordin, A. Ismail, Surya Murali Racha, N. B. Cheer, M. Bilad, Z. Putra, M. D. H. Wirzal

引用次数: 3