cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota bandung,
Jawa barat
INDONESIA
Journal of Engineering and Technological Sciences
Published by Institut Teknologi Bandung
ISSN : 23375779     EISSN : 23385502     DOI : -
Core Subject : Engineering,
Engineering
Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental Engineering, Industrial Engineering, Information Engineering, Mechanical Engineering, Material Science and Engineering, Manufacturing Processes, Microelectronics, Mining Engineering, Petroleum Engineering, and other application of physical, biological, chemical and mathematical sciences in engineering. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere. Starting from Vol. 35, No. 1, 2003, full articles published are available online at http://journal.itb.ac.id, and indexed by Scopus, Index Copernicus, Google Scholar, DOAJ, GetCITED, NewJour, Open J-Gate, The Elektronische Zeitschriftenbibliothek EZB by University Library of Regensburg, EBSCO Open Science Directory, Ei Compendex, Chemical Abstract Service (CAS) and Zurich Open Repository and Archive Journal Database. Publication History Formerly known as: ITB Journal of Engineering Science (2007 – 2012) Proceedings ITB on Engineering Science (2003 - 2007) Proceedings ITB (1961 - 2002)
Arjuna Subject : -
Articles 10 Documents
 1 
Search results for , issue "Vol. 49 No. 2 (2017)" : 10 Documents clear
A Comprehensive Comparison Study of Empirical Cutting Transport Models in Inclined and Horizontal Wells Asep Mohamad Ishaq Shiddiq; Brian Christiantoro; Ildrem Syafrie; Abdurrokhim -; Bonar Tua Halomoan Marbun; Petra Wattimury; Hastowo Resesiyanto
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.9

Abstract

In deviated and horizontal drilling, hole-cleaning issues are a common and complex problem. This study explored the effect of various parameters in drilling operations and how they affect the flow rate required for effective cutting transport. Three models, developed following an empirical approach, were employed: Rudi-Shindu's model, Hopkins', and Tobenna's model. Rudi-Shindu's model needs iteration in the calculation. Firstly, the three models were compared using a sensitivity analysis of drilling parameters affecting cutting transport. The result shows that the models have similar trends but different values for minimum flow velocity. Analysis was conducted to examine the feasibility of using Rudi-Shindu's, Hopkins', and Tobenna's models. The result showed that Hopkins' model is limited by cutting size and revolution per minute (RPM). The minimum flow rate from Tobenna's model is affected only by well inclination, drilling fluid weight and drilling fluid rheological property. Meanwhile, Rudi-Shindu's model is limited by inclinations above 45°. The study showed that the investigated models are not suitable for horizontal wells because they do not include the effect of lateral section.
A Novel Analytical Technique for Optimal Allocation of Capacitors in Radial Distribution Systems Sarfaraz Nawaz; Ajay Kumar Bansal; Mahaveer Prasad Sharma
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.6

Abstract

In this paper, a novel analytical technique is proposed to determine the optimal size and location of shunt capacitor units in radial distribution systems. An objective function is formulated to reduce real power loss, to improve thevoltage profile and to increase annual cost savings. A new constant, the Loss Sensitivity Constant (LSC), is proposed here. The value of LSC decides the location and size of candidate buses. The technique is demonstrated on an IEEE-33 bus system at different load levels and the 130-bus distribution system of Jamawa Ramgarh village, Jaipur city. The obtained results are compared with the latest optimization techniques to show the effectiveness and robustness of the proposed technique.
Probabilistic Modeling of Seismic Risk Based Design for a Dual System Structure Indra Djati Sidi
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.2

Abstract

The dual system structure concept has gained popularity in the construction of high-rise buildings over the last decades. Meanwhile, earthquake engineering design provisions for buildings have moved from the uniform hazard concept to the uniform risk concept upon recognizing the uncertainties involved in the earthquake resistance of concrete structures. In this study, a probabilistic model for the evaluation of such risk is proposed for a dual system structure consisting of shear walls or core walls and a moment frame structure as earthquake resistant structure. Uncertainties in the earthquake resistance of the dual system structure due to record-to-record variability, limited amount of data, material variability and structure modeling are included in the formulation by means of the first-order second-moment method. The statistics of resistance against earthquake forces are estimated by making use of incremental nonlinear time history analysis using 10 recorded earthquake histories. Then, adopting the total probability theorem, the reliability of the structure is evaluated through a risk integral scheme by combining the earthquake resistance of the structure with the annual probability of exceedance for a given location where the building is being constructed.
Synchronicity of Stress Wave Propagation in Bolt Body and Anchorage Medium Bing Sun; Jie-hui Xie; Sheng Zeng
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.7

Abstract

Accurate assessment of anchoring quality depends on the accuracy of assessing stress wave velocity in the anchor system. Stress wave velocity is closely related to collaborative vibration and depends on the degree of bonding between anchor body and anchorage medium. Bonding differences can be large at different ages. Based on stress wave reflection methods, non-destructive testing of anchors was performed using sensors arranged at the same cross-section of the anchor body and anchorage medium, which showed stress wave synchronization. In the early stage of filling, stress wave synchronicity was poorer between the anchor body and mortar. Therefore, the anchor should not be treated as a composite material when determining its wave velocity. Once the mortar hardens, the stress waves become more synchronous and the anchor can be regarded as a composite material. Stress wave synchronicity between the anchor body and mortar is related to mortar age and anchorage length. The anchor length required to provide stress wave synchronization between the anchor body and mortar decreases with increasing mortar age. Stress wave velocity rules were derived for different ages to provide the basis for accurately determining the stress wave velocity in the anchor.
Post Preloading Creep Properties of Highly Compressible Harbor Marine Sediments Franciscus Xaverius Toha
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.1

Abstract

A laboratory experimental research in creep behavior of soft clay marine sediments was done to investigate creep strain under reloading. A total of 52 oedometer tests were carried out with 16 slurry sediment samples subjected to cycles of unloading at preload removal pressure and reloading to higher design pressures. Common practice as well as more recent advanced methods of creep deformation analysis were used to refine the predictions. The study indicates that although preloading substantially reduces post construction creep, the analysis is very sensitive to creep indices at slight overconsolidation and the resulting creep may not be negligible at previously established limits of primary to secondary compression ratios.
Case Study of a Small Scale Reverse Osmosis System for Treatment of Mixed Brackish Water and STP Effluent I Nyoman Widiasa; Retno Dwi Jayanti
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.3

Abstract

A case study on utilizing reverse osmosis (RO) technology to fulfill fresh water needs at a mall and a hotel has been done on Bali Island, Indonesia. A mix of brackish water and sewage treatment plant (STP) effluent was used as feed water in the RO system. The system used 36 membrane elements (CSM RE 8040 BLN) arranged into two stages: 8 pressure vessels (PVs) in the first stage and 4 PVs in the second stage, each loaded with 3 membranes. The objectives of this research were to assess the cleaning effectivity in the plant, to evaluate the cleaning of 1 membrane element using a CIP system, and to assess the use of the membrane for filtration in the pre-treatment system. SEM and FTIR analysis indicated that the foulants on the membrane surface were dominated by organic foulants and inorganic deposits. To clean the discarded membrane the proposed method used NaOH solution (pH 12 and pH 13) and citric acid (pH 2 and pH 3). All membranes displayed a dramatic decline in rejection of about 80%. Based on the rejection tests of SO42-, Cl-, turbidity reduction approached 100%. It can be concluded that an RO membrane that has undergone selectivity decline can be re-used as a filtration membrane in the pre-treatment system.
Urban Energy Scenario: the Case of Kathmandu Valley Maria E. I. Shrestha; Junun Sartohadi; Mohammad Kholid Ridwan; Dyah R. Hizbaron
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.4

Abstract

Rapid urbanization has made Kathmandu Valley one of the fastest growing metropolitan cities in South Asia, resulting in the need of additional facilities and infrastructure. The local energy crisis is one of the issues to be addressed. High dependence on imported fossil fuels and the sluggish development of hydropower for electricity generation despite abundant water resources are the major causes to be blamed for the energy crisis in Nepal. This study investigated possible strategies to be implemented in Kathmandu Valley to deal with the discrepancy between energy demand and supply. Several scenarios have been developed and analyzed, both quantitatively and qualitatively. The Comprehensive Scenario, which borrowed from all other developed scenarios, seems superior to the others. It reduces the energy demand by 32.36%, the GHG emission by 44.12%, and the social cost by 33.79%. This scenario implies that the Kathmandu Valley authority will support the installation of photovoltaic solar panels, the use of electric vehicles and electric cookers, and convert solid waste into energy. However, the EV Scenario (electric vehicles) is the one to be given priority in the implementation for its better performance than the other individual scenarios.
Development of Composite Adsorbent Coating Based Acrylic Polymer/Bentonite for Methylene Blue Removal Syahida Farhan Azha; Shazlina Abd Hamid; Suzylawati Ismail
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.5

Abstract

The development of composite adsorbent coating based acrylic polymer solution (APS) mixed with bentonite (ben) was investigated. The composite adsorbent coating was prepared and coated to a high surface area substrate, cotton cellulosic fiber (CCF). The APS/ben-CCF was used for a single cationic methylene blue (MB) dye adsorption system. Characterization of composition and structure of materials and coating was carried out by X-ray fluorescence (XRF), scanning electron microscopy (SEM), and UV-spectroscopy (UV-VIS). The adsorption properties of the APS/ben-CCF were investigated as a function of solution pH, initial dye concentration and contact time as well as solution temperature of MB dye. The result revealed that the APS/ben-CCF functioned well in solutions of various pH (acidic to alkaline), achieving 100% removal of MB within 2 hours of adsorption for 50 ppm. Kinetic studies showed that APS/ben-CCF is endothermic in nature since the adsorption capacity increased with increasing solution temperature. These results demonstrate that APS/ben-CCF composite adsorbent coating is an advanced adsorbent with advantages such as easy phase separation and capability to remove cationic dyes in a short time period.
Cultivation Strategy for Freshwater Macro- and Micro-Algae as Biomass Stock for Lipid Production Marieska Verawaty; Elda Melwita; Putri Apsari; Mayumi Mayumi
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.8

Abstract

In this research, an algae cultivation strategy was studied. Integrating algae cultivation with wastewater treatment is currently seen as one of the most economical ways of producing algae biomass. A combination of an anaerobic baffled reactor (ABR) and a constructed wetland (CW) was applied for treating domestic wastewater with an additional collection tank for improving effluent quality. The effluent produced from the three stages was used as algae cultivation media and suplemented with 10% bold basal medium (BBM). The results showed both micro- and macro-algae growth and their lipid contents were higher when they were grown in effluent-BBM (9:1 v/v) media. The lipid content of the micro-algae mixed culture was 16.5% while for macro-algae Oedogonium sp and Cladophora sp it was 6.90% and 6.75% respectively.
Cover Vol. 49 No. 2, 2017 Journal of Engineering and Technological Sciences
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Page 1 of 1 | Total Record : 10

 1 

Filter by Year

2017 2017


Reset
Filter By Issues
All Issue Vol. 55 No. 6 (2023) Vol. 55 No. 5 (2023) Vol. 55 No. 4 (2023) Vol. 55 No. 3 (2023) Vol. 55 No. 2 (2023) Vol. 55 No. 1 (2023) Vol. 54 No. 6 (2022) Vol. 54 No. 5 (2022) Vol. 54 No. 4 (2022) Vol. 54 No. 3 (2022) Vol. 54 No. 2 (2022) Vol. 54 No. 1 (2022) Vol. 53 No. 6 (2021) Vol. 53 No. 5 (2021) Vol. 53 No. 4 (2021) Vol. 53 No. 3 (2021) Vol. 53 No. 2 (2021) Vol. 53 No. 1 (2021) Vol. 52 No. 6 (2020) Vol. 52 No. 5 (2020) Vol. 52 No. 4 (2020) Vol. 52 No. 3 (2020) Vol 52, No 3 (2020) Vol 52, No 2 (2020) Vol. 52 No. 2 (2020) Vol 52, No 1 (2020) Vol. 52 No. 1 (2020) Vol. 51 No. 6 (2019) Vol 51, No 6 (2019) Vol 51, No 5 (2019) Vol. 51 No. 5 (2019) Vol. 51 No. 4 (2019) Vol 51, No 4 (2019) Vol 51, No 3 (2019) Vol. 51 No. 3 (2019) Vol 51, No 2 (2019) Vol. 51 No. 2 (2019) Vol 51, No 2 (2019) Vol 51, No 1 (2019) Vol 51, No 1 (2019) Vol. 51 No. 1 (2019) Vol. 50 No. 6 (2018) Vol 50, No 6 (2018) Vol 50, No 6 (2018) Vol. 50 No. 5 (2018) Vol 50, No 5 (2018) Vol 50, No 5 (2018) Vol. 50 No. 4 (2018) Vol 50, No 4 (2018) Vol 50, No 4 (2018) Vol 50, No 3 (2018) Vol 50, No 3 (2018) Vol. 50 No. 3 (2018) Vol 50, No 2 (2018) Vol. 50 No. 2 (2018) Vol 50, No 2 (2018) Vol. 50 No. 1 (2018) Vol 50, No 1 (2018) Vol 49, No 6 (2017) Vol. 49 No. 6 (2017) Vol 49, No 6 (2017) Vol 49, No 5 (2017) Vol 49, No 5 (2017) Vol. 49 No. 5 (2017) Vol 49, No 4 (2017) Vol 49, No 4 (2017) Vol. 49 No. 4 (2017) Vol. 49 No. 3 (2017) Vol 49, No 3 (2017) Vol 49, No 3 (2017) Vol. 49 No. 2 (2017) Vol 49, No 2 (2017) Vol 49, No 2 (2017) Vol. 49 No. 1 (2017) Vol 49, No 1 (2017) Vol. 48 No. 6 (2016) Vol 48, No 6 (2016) Vol 48, No 6 (2016) Vol. 48 No. 5 (2016) Vol 48, No 5 (2016) Vol 48, No 5 (2016) Vol 48, No 4 (2016) Vol. 48 No. 4 (2016) Vol. 48 No. 3 (2016) Vol 48, No 3 (2016) Vol. 48 No. 2 (2016) Vol 48, No 2 (2016) Vol 48, No 1 (2016) Vol. 48 No. 1 (2016) Vol. 47 No. 6 (2015) Vol 47, No 6 (2015) Vol. 47 No. 5 (2015) Vol 47, No 5 (2015) Vol. 47 No. 4 (2015) Vol 47, No 4 (2015) Vol. 47 No. 3 (2015) Vol 47, No 3 (2015) Vol 47, No 2 (2015) Vol. 47 No. 2 (2015) Vol 47, No 1 (2015) Vol. 47 No. 1 (2015) Vol 46, No 4 (2014) Vol. 46 No. 4 (2014) Vol 46, No 3 (2014) Vol. 46 No. 3 (2014) Vol. 46 No. 2 (2014) Vol 46, No 2 (2014) Vol 46, No 1 (2014) Vol. 46 No. 1 (2014) Vol. 45 No. 3 (2013) Vol 45, No 3 (2013) Vol. 45 No. 2 (2013) Vol 45, No 2 (2013) Vol. 45 No. 1 (2013) Vol 45, No 1 (2013) Vol 44, No 3 (2012) Vol. 44 No. 3 (2012) Vol. 44 No. 2 (2012) Vol 44, No 2 (2012) Vol 44, No 1 (2012) Vol. 44 No. 1 (2012) Vol. 43 No. 3 (2011) Vol 43, No 3 (2011) Vol 43, No 2 (2011) Vol. 43 No. 2 (2011) Vol 43, No 1 (2011) Vol. 43 No. 1 (2011) Vol. 42 No. 2 (2010) Vol 42, No 2 (2010) Vol 42, No 1 (2010) Vol. 42 No. 1 (2010) Vol 41, No 2 (2009) Vol. 41 No. 2 (2009) Vol. 41 No. 1 (2009) Vol 41, No 1 (2009) Vol 40, No 2 (2008) Vol. 40 No. 2 (2008) Vol. 40 No. 1 (2008) Vol 40, No 1 (2008) Vol 39, No 2 (2007) Vol. 39 No. 2 (2007) Vol 39, No 1 (2007) Vol. 39 No. 1 (2007) Vol 38, No 2 (2006) Vol. 38 No. 2 (2006) Vol. 38 No. 1 (2006) Vol 38, No 1 (2006) Vol 37, No 2 (2005) Vol. 37 No. 2 (2005) Vol. 37 No. 1 (2005) Vol 37, No 1 (2005) Vol 36, No 2 (2004) Vol. 36 No. 2 (2004) Vol 36, No 1 (2004) Vol. 36 No. 1 (2004) Vol. 35 No. 2 (2003) Vol 35, No 2 (2003) Vol. 35 No. 1 (2003) Vol 35, No 1 (2003) More Issue