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Agus Purwadi
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National Center for Sustainable Transportation Technology Gd. CRCS lt. 2, Institut Teknologi Bandung, Jl. Ganesha No.10, Lb. Siliwangi, Kecamatan Coblong, Kota Bandung, Jawa Barat 40132
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Kota bandung,
Jawa barat
INDONESIA
International Journal of Sustainable Transportation Technology
Published by Institut Teknologi Bandung
ISSN : 26557975     EISSN : 26204754     DOI : 10.31427/IJSTT
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Transportation
Aim IJSTT is an innovative open access journal for high-quality research in transportation and infrastructure system by focusing particularly on interdisciplinary and multidisciplinary research. IJSTT welcomes submissions from all disciplines, including physics, chemistry, engineering and related fields. The journal represents a community-oriented approach to communicating science driven by the needs of scientists and aims to facilitate the flow of knowledge between and beyond these communities. Scope This journal seeks articles related to the transportation and infrastructure technology. Its scope will include the following topics (but not limited to): 1. Transportation and infrastructure system 2. Electrical and combustion vehicle system 3. Transportation and infrastructure safety 4. Socio-economic and environmental impact of transportation policy 5. Manufacturing and supply chain process in automotive industries 6. Computational materials science and modelling 7. Design and construction for transportation system and such other topics as the Editors may deem appropriate. Articles need to make a significant contribution to the theoretical and or methodological literature on the subject and contain a strong knowledge component. IJSTT welcomes submissions of the following article types: Short communication paper (Letters), Technical Paper, Original Research Paper and Topical Reviews.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 44 Documents
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Optimization of Longitudinal Control of an Autonomous Vehicle using Flower Pollination Algorithm based on Data-driven Approach Ma'ani, Fadillah; Nazaruddin, Yul
http://dx.doi.org/10.31427/IJSTT.2020.3.2.4
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Abstract

Some challenges in the development of autonomous vehicles, such as generating a model representing the dynamics of the speed, designing a longitudinal controller, and the optimization method, are still explored until now. In this paper, a longitudinal controller based on the proportional-integral-derivative controller with an additional feedforward term is proposed, where the Flower Pollination Algorithm is employed for optimizing the controller. The feed-forward term and the model used in the optimization are generated using the data-driven approach. For the optimization, a cost function considering mean absolute error and mean absolute jerk will be minimized. The simulation study was performed using the CARLA simulator, and the results show that the proposed scheme represents the dynamics of the speed very well inside the range of the training data and does not overfit the training data. It is also demonstrated that the proposed longitudinal controller can track the desired speed satisfactorily in a non-straight path.
Al Ions Doping Effect on The Diffusion Coefficient and Capacity of Li4Ti5O12 (Lithium Titanate, LTO) in Lithium-Ion Battery Anode Priyono, Slamet; Daniswara, Lufthansyah; Khoiri, Rahma; Astuti, Yayuk
http://dx.doi.org/10.31427/IJSTT.2020.3.2.3
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Abstract

Li4Ti5O12 (LTO) anode doped with Al ions with varying concentrations (Al = 0; 0.005; 0.015; 0.03; 0.045) was successfully synthesized using the sol-gel method. Al-doped LTO samples were obtained through the sintering of gel at 850oC for 4 hours under a normal atmosphere. Electrochemical performance such as charge-discharge capacity and diffusion coefficient were characterized using an automatic battery cycler. The cells consist of electrode sheets (LTO doping Al) as a working electrode, lithium metal as the counter electrode, Celgard film as the separator, and LiPF6 as an electrolyte. Cyclic voltammetry test results show that a greater scan rate results in decreased capacity and greater polarization voltage. In addition, an increase in concentrations used in Al doping on LTO causes capacity, and the diffusion coefficient tends to decrease.
Highway Failure and Their Maintenance: A Study of Rajshahi Metropolitan City, Rajshahi, Bangladesh Hasan, Mehedi; Sobhan, Mohd.
http://dx.doi.org/10.31427/IJSTT.2020.3.2.2
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Abstract

Total length of paved road in Rajshahi City is about 186.64 km (2011 census). It shows that about 23% of total road lengths are present in failure condition. This study shows an investigation to compute the flexible pavement’s failure types, to define and identify the causes, and select the best maintenance for that failures of flexible pavement within Rajshahi City. There are many types of failures occur on the roads such as different types of cracks, potholes, raveling, water bleeding, corrugation and shoving, depression, and rutting. The possible causes of flexible pavement failures are improper bituminous mixes with poor quality of materials, heavy traffic loads, heavy rainfall, and bad drainage on pavement. The failures are gradually raised due to lack of proper planning, inspection, and treatment. These failures create different types of disadvantages like traffic jam, discomfort to the passengers as well as drivers, increasing vehicle operating, maintenance cost, etc. This study proves that the authorities practice maintenance procedures to repair the failures of pavement which are about 60% similar to the conventional road maintenance procedures. The authorities as Roads and Highway Department and Rajshahi City Corporation are suggested to do maintenance according to the requirements of urgent maintenance and availability of fund which is found in this investigation.
Foldable Front Child-Seat Design for Scooter Motorcycle: Strength Analysis Under Static and Dynamic Loading Zulaikah, Siti; Rahmanda, Wahyu; Triawan, Farid
http://dx.doi.org/10.31427/IJSTT.2020.3.2.1
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Abstract

Nowadays, motorcycle is considered as one of the most practical transportation mode in Indonesia. It has become a common practice that a motorcycle rider often brings a small child using a child seat while riding. However, the used child seat is usually not safe and can easily fall off from the motorcycle due to the lack of safety consideration. Moreover, it is very risky to ride a motorcycle with a small child, knowing that motorcycles are the highest contributor to road traffic accidents. For this reason, this paper proposes a primary design idea of a foldable child safety-seat that can be placed on the front part of a scooter motorcycle. This design is also completed with strength analysis to evaluate the components’ safety for children under five years old with a weight of around 50 kg. The strength calculation of the frame is done by a theoretical approach under static and dynamic loading. According to the analysis, the proposed child seat design could provide a factor of safety of more than 3.6 for static loading and 1.6 for dynamic loading. This study is expected to be used as a reference for developing a more reliable child safety- seat for motorcycle rider in Indonesia.
A Critical Review on Lightweight Design of Battery Pack Enclosure for Electric Vehicles Dhoke, Ashvin; Dalavi, Amol
http://dx.doi.org/10.31427/IJSTT.2021.4.2.2
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Abstract

An electric vehicle battery pack which is a gathering of battery modules which subsequently comprised of the battery cell is a primary source of control transmission for an Electric Vehicle (EV). The inappropriate design of the battery enclosure will cause many genuine issues, such as cracking, causing noise, or battery harm. At the same time, the weight of the battery enclosure is huge; in order to get better the driving range of the electric vehicle and diminish the influence of the battery on the vehicle dynamic performance and acceleration performance, it is essential to carry out the lightweight design of the battery enclosure. This paper reviews the multi-material battery enclosure design optimization, the multi- technologies, and a proficient Battery Management System (BMS) for compact battery pack design used to lightweight battery pack enclosure design; the multi-objective optimization approach for distinctive parameters of battery pack enclosure design optimization by diverse manufacturing techniques.
Literature Review: Synthesis Methods of NiFe2O4 Nanoparticles for Aqueous Battery Applications Haq, Fatih; Zein, Muhammad; Gabriella, Rachel; Putri, Silmi; Nandiyanto, Asep; Kurniawan, Tedi
http://dx.doi.org/10.31427/IJSTT.2021.4.2.1
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Abstract

Today, the application of NiFe2O4 nanoparticles is increasing in the field of technology that is in great demand, thereby increasing the demand for industrial production. The use of NiFe2O4 nanoparticles can be applied in various technologies, including aqueous batteries. Therefore, an effective method for industrial production is needed. This paper aims to discuss and compare a more efficient method in the synthesis of NiFe2O4. The research method used is a literature review of 62 papers. There are several NiFe2O4 synthesis methods, namely Coprecipitation, Citrate Precursor Technique, Mechanical Alloying, Hydrothermal, Sonochemistry, Reverse Micelle, Sol-Gel, and Pulsed Wire Discharge. The results show that the effective synthesis method of NiFe2O4 is Hydrothermal. This is because the hydrothermal method is economically feasible, environmentally friendly, and has no requirement of high temperatures in the calcination process to produce the final product. The nanoparticle size is around 29.39 nm. This paper is expected to assist in selecting the synthesis method of NiFe2O4.
Bibliometric Analysis of Nano-Sized Agricultural Waste Brake Pads Research During 2018-2022 Using VOSviewer
http://dx.doi.org/10.31427/IJSTT.2022.5.1.2
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Abstract

The agricultural brake pad is one solution to reduce the danger of using asbestos in-vehicle systems. This research aims to conduct bibliometric analysis in nano-sized agricultural waste brake pads by combining mapping analysis using VOSviewer software. Application reference manager used to obtain research data. The data received results from a search based on the keyword “Brake pads, Nano-sized, Agricultural waste.” The search results found 1000 relevant published articles in 2018-2022. The results showed that research on nano-sized agricultural waste brake pads has been increasing through the year, and research continues with a high number of publications in early 2022. This study demonstrates the importance of bibliometric analysis in analyzing data on what phenomena happen. This research is expected to help and become a reference for researchers in conducting and determining the research themes.
A Case Study of a 15-Minute City Concept in Singapore’s 2040 Land Transport Master Plan: 20-Minute Towns and a 45-Minute City
http://dx.doi.org/10.31427/IJSTT.2022.5.1.1
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Abstract

The 15-Minute city concept emerged as a response to the hyper-motorized city. First popularized by the Mayor of Paris in 2020, 15-Minute City is an evolving concept that derived from its predecessors such as neighborhood-unit planning and walkable city. This paper explores the implementation of the 15-Minute City concept in city planning by using Singapore as the case study. In 2018, Singapore released its Land Transport Master Plan 2040 and which includes an ambitious concept of 20-Minute Towns and a 45-Minute City (2MT45MC) and has similar ideas to the 15-Minute City concept. Through various journal articles and media coverage, Singapore’s policy and regulation regarding its transport planning were thoroughly reviewed to find Singapore’s strategy and challenges in realizing the objective of its 2MT45MC concept. Normalizing active mobility and enhancing connectivity nationwide are the main strategies to overcome the biggest challenges faced: lack of legal backing in personal mobility devices and the country’s rigid zoning. Even though it is too early to say whether 2MT45MC is achievable or not, projects such as the North-South Corridor show that for a long-term plan, it seems feasible.
Parametric Study of Factors Affecting Lateral Stability of a Public Transportation Vehicle
http://dx.doi.org/10.31427/IJSTT.2021.4.2.5
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Abstract

The availability of public transport is one of the solutions to traffic congestion in Jakarta. Focusing on angkot, one of the public transport types in Jakarta, this study discusses a model and simulations to investigate several factors that affect its lateral stability. Those factors include rear tire inflation pressure, passenger configuration, velocity, and downhill inclination angle. The results show that the stability of an angkot is proportional to the rear tires cornering stiffness. It also has an indirect relationship with the passenger configuration within the angkot. Moreover, the stability of an angkot decreases as its velocity and the angle of the inclined road increase. In general, this study is expected to have a contribution to the development of public transport in Jakarta, especially angkot.
Science Teaching Materials for Students with Special Needs: Concept of Exhaust Emissions in Transportation Equipment
http://dx.doi.org/10.31427/IJSTT.2021.4.2.4
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Abstract

The purpose of this study was to find out science learning materials for students with special needs regarding the concept of exhaust emissions in transportation equipment. The research method used experimental demonstration. We prepared research instruments for learning the concept of exhaust emissions in transportation equipment for students with special needs. The results showed that several tools and materials must be provided and several lists of research instrument questions were made. In addition to tools and materials, methods and media must also be adapted to the needs of the child. That’s because the methods and media that are in accordance with the needs of students can make it easier for students to understand the learning material. We hope that the results of this study can make it easier for teachers to teach the concept of exhaust gas emission on transportation equipment, especially for students with special needs.

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