Indonesian Journal of Science and Technology最新文献_第5页

A Bibliometric Analysis of Management Bioenergy Research Using Vosviewer Application 利用Vosviewer应用程序对管理生物能源研究的文献计量分析

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.43328

H. Soegoto, E. S. Soegoto, S. Luckyardi, Agis Abdi Rafdhi

{"title":"A Bibliometric Analysis of Management Bioenergy Research Using Vosviewer Application","authors":"H. Soegoto, E. S. Soegoto, S. Luckyardi, Agis Abdi Rafdhi","doi":"10.17509/ijost.v7i1.43328","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.43328","url":null,"abstract":"This study aims at analyzing and demonstrating bibliometric data analysis step by step using VOSViewer systematically. Step-by-step analysis was provided to make first-time users access and utilize VOSViewers more easily. This study provides data analysis regarding management bioenergy and its development throughout five years (2017–2021) by utilizing mapping tools in the VOSViewer. The method used was qualitative descriptive to describe the bibliometric analysis performance by producing network visualization of the chosen topic. From the search results, 1000 relevant published journals were found, ranging from 2017–2021, which were then grouped into five categories according to their published year. After grouping the journal data, we discovered that the total number of articles published on the topic of bioenergy management from 2017 to 2021 was 180. As a result, it conclude that management bioenergy is a field that can be combined with another field to be studied. This way, there is a lot of opportunities to find novelties in this topic. Furthermore, this study is expected to serve as a resource for researchers conducting research and determining the research theme.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78129578","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: 25

Study of the Catecholase Activity of new catalysts Based on Copper (II) and Heterocyclic Ligands 基于铜(II)和杂环配体的新型催化剂儿茶酚酶活性研究

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.41605

R. E. Ati, H. Bouammali, M. E. Kodadi, E. B. Yousfi, R. Touzani, B. Hammouti

引用次数: 0

Crosslinked Spin-Assisted Layer-by-Layer Polyelectrolyte Nanofiltration Membrane: From Literature Review to Experiment 交联自旋辅助层状聚电解质纳滤膜:从文献综述到实验

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.45181

F. Fadhillah

{"title":"Crosslinked Spin-Assisted Layer-by-Layer Polyelectrolyte Nanofiltration Membrane: From Literature Review to Experiment","authors":"F. Fadhillah","doi":"10.17509/ijost.v7i1.45181","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.45181","url":null,"abstract":"Layer-by-Layer (LbL) assembly is considered as the most versatile and robust method in thin-film fabrication. However, its use in the preparation of desalination membrane is still in its infancy. Spin-assisted layer-by-layer assembly (SA-LbL), one of the LbL variants, was selected for the fabrication of a nanofiltration membrane due to its versatility to produce an ultra-thin film with highly controlled film properties within an incredibly short time. Branched-polyethyleneimine (PEI) and poly(sodium 4-styrenesulfonate) (PSS) were employed and alternately deposited on the top of the ultrafiltration polyethersulfone (PES) substrate. PEI/PSS film was then crosslinked using Gluteraldehyd (GA). The resulting membrane was tested at a feed concentration of 2000 ppm NaCl, a pressure of 10 bar, and a temperature of 25°C. Crosslinking time and many layers were varied to investigate the extent of crosslinking and its impact on membrane performance. The permeation test of (PEI/PSS)10 crosslinked for 6 hours showed rejection of 94.2 % and water flux of 4.2 L/h·m2 meanwhile uncrosslinked (PEI/PSS)35 showed rejection of 75.66% only. The result showed that crosslinking improved the rejection of NaCl with a smaller number of layers. This result also displayed SA-LbL method is promising and can be used to produce membrane suitable for NF or RO application.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86348735","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: 0

A New Multicarrier Sinusoidal Pulse Width Modulation (SPWM) Strategy based on Rooted Tree Optimization (RTO) Algorithm for Reducing Total Harmonic Distortion (THD) of Switched-Capacitor Nine-level Inverter in Grid-connected PV systems 基于根树优化(RTO)算法的多载波正弦脉宽调制(SPWM)策略降低并网光伏系统中开关电容九电平逆变器总谐波失真(THD

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.41716

H. Aboub, R. Mechouma, B. Azoui, C. Labiod, A. Khechekhouche

{"title":"A New Multicarrier Sinusoidal Pulse Width Modulation (SPWM) Strategy based on Rooted Tree Optimization (RTO) Algorithm for Reducing Total Harmonic Distortion (THD) of Switched-Capacitor Nine-level Inverter in Grid-connected PV systems","authors":"H. Aboub, R. Mechouma, B. Azoui, C. Labiod, A. Khechekhouche","doi":"10.17509/ijost.v7i1.41716","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.41716","url":null,"abstract":"This paper proposed a new strategy of sinusoidal pulse width modulation (SPWM) technique to control three-phase nine-level switched-capacitor inverter (9LSCI) in grid-connected PV systems. The main advantage of this inverter is high voltage gain, achieved by switching the capacitors in series and parallel to boost up the output voltage using low voltage input. To improve the quality of solar energy for injection into the electrical grid, a rooted tree optimization (RTO) algorithm is used to get optimum values of initial angles of multi carriers SPWM technique, giving the lowest possible values of the total harmonic distortion (THD). The design also can maximize the efficiency of the multi-level inverter by minimizing its size using fewer components and a single DC source and reducing the rate of THD. The higher effectiveness and accuracy of the suggested RTO-SPWM technique was tested and verified in comparison to existing classical SPWM technique from the performance of PV-grid systems that it can effectively reduce the total harmonic distortion to 0.16 %.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89625259","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

Aerodynamic Performance of Vertical and Horizontal Axis Wind Turbines: A Comparison Review 垂直轴风力机与水平轴风力机气动性能的比较研究

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.43161

Hesam Eftekhari, A. Al-Obaidi, Shahrooz Eftekhari

{"title":"Aerodynamic Performance of Vertical and Horizontal Axis Wind Turbines: A Comparison Review","authors":"Hesam Eftekhari, A. Al-Obaidi, Shahrooz Eftekhari","doi":"10.17509/ijost.v7i1.43161","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.43161","url":null,"abstract":"The need for energy and electricity has been increasing globally, and this means more power is required from the power plants. Power plants, however, will then continue harming the earth because of the greenhouse gasses produced while generating energies that contribute to global warming. Using renewable sources to produce clean energies is one of the sustainable methods to deal with such challenges. Wind energy is one of the renewable sources, which is accessible anywhere on earth, creating green energy. Wind turbines are mainly categorized into Horizontal Axis Wind Turbines (HAWT) and Vertical Axis Wind Turbines (VAWT). This paper firstly presents a general comparison between the HAWTs and VAWTs. Then, it presents mathematical modelling for the aerodynamic factors of HAWT and Darrieus VAWT to assist the researchers to understand some key design aspects of wind turbines, such as lift/drag ratio, tip speed ratio, power coefficient, and torque coefficient. Also, this paper presents a review of the aerodynamic performance of the recent VAWT designs to help researchers to identify and choose the best model among the Savonius and Darrieus rotors for further development or designing a new model at different wind conditions. This comparison review shows that for a large scale HAWT upwind 3 bladed wind turbines are the most optimum. The helical Savonius rotors perform better by having positive torque coefficient at all azimuth angles. Moreover, helical Darrieus was found to produce lesser noise and suitable for conventional areas. hybrid Savonius-Darrieus rotors can solve the self-starting challenge of the VAWTs, and they are suitable at low wind speeds. At last, this review shows some of the recent hybrid Savonius-Darrieus rotors which would help to solve the low efficiency of Savonius rotor and self-starting challenge of Darrieus rotors.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"171 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83585526","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: 3

Potential Molecular Interaction of Nutmeg’s (Myristica fragrans) Active Compound via Activation of Caspase-3 肉豆蔻(Myristica fragrans)活性化合物活化Caspase-3的潜在分子相互作用

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.45663

R. Lesmana, Filza Yulina Ade, Y. Pratiwi, Hanna Goeanawan, N. Sylviana, S. Megantara, S. Susianti, V. Tarawan, P. S. Rejeki, H. Ray, U. Supratman

引用次数: 0

Risk-Based Leak Analysis of an LPG Storage Tank: A Case Study 基于风险的LPG储罐泄漏分析:一个案例研究

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.42916

S. Munahar, B. Purnomo, Nanda Ferdiansyah, E. Widodo, M. Aman, R. Rusdjijati, M. Setiyo

引用次数: 0

Finite-Time Control of Wing-Rock Motion for Delta Wing Aircraft Based on Whale-Optimization Algorithm 基于鲸鱼优化算法的三角翼飞机翼岩运动有限时间控制

Indonesian Journal of Science and Technology Pub Date : 2021-08-21 DOI: 10.17509/ijost.v6i3.37922

Arif A. Al-Qassar, A. Al-Obaidi, Alaq F. Hasan, Amjad J. Humaidi, A. R. Nasser, A. Alkhayyat, I. Ibraheem

{"title":"Finite-Time Control of Wing-Rock Motion for Delta Wing Aircraft Based on Whale-Optimization Algorithm","authors":"Arif A. Al-Qassar, A. Al-Obaidi, Alaq F. Hasan, Amjad J. Humaidi, A. R. Nasser, A. Alkhayyat, I. Ibraheem","doi":"10.17509/ijost.v6i3.37922","DOIUrl":"https://doi.org/10.17509/ijost.v6i3.37922","url":null,"abstract":"The rise of wing-rock motion in delta-wing aircraft has an adverse effect on the manoeuvrability of aircraft and it may result in its crash. This study presents a finite-time control design to tackle the dynamic motion due to the Wing-Rock effect in delta-wing aircraft. The control design is developed based on the methodology of Super Twisting Sliding Mode Control (STSMC). The Lyapunov stability analysis has been pursued to ensure asymptotic convergence of errors and to determine the finite time. The design of STSMC leads to the appearance of design parameters, which have a direct impact on the dynamic performance of the controlled system. To avoid the conventional tuning of these parameters and to have an optimal performance of the proposed controller, a modern optimization technique has been proposed based on Wale Optimization Algorithm. A comparison study between optimal and non-optimal finite-time super twisting sliding mode controllers has been established and their effectiveness has been verified via numerical simulation using MATLAB programming format.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90432299","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

The Concise Latest Report on the Advantages and Disadvantages of Pure Biodiesel (B100) on Engine Performance: Literature Review and Bibliometric Analysis 纯生物柴油(B100)对发动机性能的利弊的最新简明报告:文献综述和文献计量分析

Indonesian Journal of Science and Technology Pub Date : 2021-08-21 DOI: 10.17509/ijost.v6i3.38430

M. Setiyo, Dori Yuvenda, O. Samuel

{"title":"The Concise Latest Report on the Advantages and Disadvantages of Pure Biodiesel (B100) on Engine Performance: Literature Review and Bibliometric Analysis","authors":"M. Setiyo, Dori Yuvenda, O. Samuel","doi":"10.17509/ijost.v6i3.38430","DOIUrl":"https://doi.org/10.17509/ijost.v6i3.38430","url":null,"abstract":"Currently, many countries are promoting B100 as the main fuel for diesel engines towards the transition to 100% renewable energy applications. However, due to its properties, B100 has both advantages and disadvantages to replace diesel oil. Therefore, a bibliometric analysis was carried out to evaluate the performance and emissions of a diesel engine with the B100 being tested on a multi-cylinder diesel engine for cars. Unfortunately, only 12 of the 127 selected articles are eligible to be reviewed in detail and none of them discusses all the key performance of diesel engines which include Brake Thermal Efficiency (BTE), Specific Fuel Consumption (SFC), Cylinder Pressure (CPs), Heat Release Rate (HRR), NOx, and smoke. Through data synthesis, we found that the use of B100 provides advantages in engine noise, thermal efficiency, specific fuel consumption, and emissions under certain engine loads. On the other hand, it also has the potential to result in poorer performance, if there is no modification to engine components and the addition of additives. As a recommendation, the results of this analysis provide a guide for further research to examine the use of B100 with all diesel engine performance variables. Research paths can be developed with the wider potential to provide new arguments on various diesel engine technologies, engine capacities, B100 raw materials, and test environments.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"523 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72442912","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: 34

Immersive Intelligent Tutoring System for Remedial Learning Using Virtual Learning Environment 基于虚拟学习环境的沉浸式补习智能辅导系统

Indonesian Journal of Science and Technology Pub Date : 2021-08-21 DOI: 10.17509/ijost.v6i3.38954

R. Rasim, Y. Rosmansyah, A. Langi, M. Munir

{"title":"Immersive Intelligent Tutoring System for Remedial Learning Using Virtual Learning Environment","authors":"R. Rasim, Y. Rosmansyah, A. Langi, M. Munir","doi":"10.17509/ijost.v6i3.38954","DOIUrl":"https://doi.org/10.17509/ijost.v6i3.38954","url":null,"abstract":"Intelligent Tutoring System (ITS) has been widely used in supporting personal learning. However, there is an aspects that have not become focus in ITS, namely immersive. This research proposes an Immersive Intelligent Tutoring (IIT) model based on Bayesian Knowledge Tracing (BKT) for determining the learner’s characteristics and learning content delivery strategies using genetic algorithms. The model uses remedial learning with a faded worked-out example. This study uses a 3-Dimensional Virtual Learning Environment (3DMUVLE) that implements immersive features to increase intrinsic motivation. This model was built using a client / server architecture. The server side component uses the MOODLE, the client side component uses OpenSim and its viewers, and the middleware component uses the Simulation Linked Object Oriented Dynamic Learning Environment (SLOODLE). Model testing is performed on user acceptance using a combination of Technology Acceptance Model (TAM) and Hedonic-Motivation System Adoption Model (HMSAM) and the impact of the model in learning using statistical test. The results showed 83% of the learners felt happy with the learning. Meanwhile, the evaluation of the impact on learning outcomes shows that the use of this model is significantly different from traditional learning.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80898640","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