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IPTEK Journal of Proceedings Series
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 23546026     EISSN : -     DOI : -
Core Subject : Science,
Computer Science & IT
IPTEK Journal of Proceedings Series publishes is a journal that contains research work presented in conferences organized by Institut Teknologi Sepuluh Nopember. ISSN: 2354-6026. The First publication in 2013 year from all of full paper in International Conference on Aplied Technology, Science, and Art (APTECS). It publish one time a year after the held of APTECS event.
Arjuna Subject : -
Articles 1,079 Documents
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The Alternative Use Of Water Hyacinth and Reed As Attached Growth Of Microbial In Waste Water Treatment Hery Purnobasuki; Nur Indradewi Oktavitri; Tri Nurhariyati; B. Saadah; Santini Ika Rafsanjani
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.227

Abstract

Aquatic plants have ability to decrease of waste water contaminant. The Water Hyacinth (Eichornia crassipes) and Reed (Imperata cylindrical) are aquatic plants which have ability to reduce concentration of BOD, TSS, COD, Total Nitrate and Total Phosphate in wetland. The other side, it can be used for media support in anaerobic treatment. Because of their abilities, there is some possibilities that Water Hyacinth and Reed can be used as attached growth of microorganisms. The aims of this study was to investigate the potential of water hyacinth and reed as attached media of microbe growth. Part of the plants are used is the trunk part. A slices of trunk is 1 cm. The analysis were conducted for 14 days with ratio 60% waste water and 40% air of reactor. Results of this study for water hyacinth that TSS decrease up to 71%. COD and Total Phosphate decrease 60%, Total Nitrate decrease 85%. While, for reed, TSS decrease up to 41%. COD decrease 56%, Total Phosphate decrease 41%. Total Nitrate decrease 10%. In conclusion, both of them had a potential as attached media of microbe growth. But, Water Hyacinth was better as media support than reed.
A Review of Structural Relationships in Closed-Loop Supply Chain Model E Yuliawati; Pratikto Pratikto; Sugiono Sugiono; O Novareza
IPTEK Journal of Proceedings Series No 6 (2018): International Conference on Advanced Engineering and Technology (ICATECH) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i6.4626

Abstract

The acquisition strategy of returned products has become essential in the study of reverse supply chain.  There are three primary activities included in the process of a the reverse supply chain, the acquisition of returned products, the remanufacturing process, and redistribution. This literature review intends to study the existing relationship amongst supply chain players in a closed-loop supply chain (CLSC) model. In the remanufacturing process performed by the company, returned products must be collected from consumers. Therefore, remanufacturing companies rely upon consumers as cores suppliers. This makes the good relationship between the two become  crucial in company operational sustainability successfully.  In this study, the identified journal articles were categorized into types of structural relationships between supply chain players and network structures of a reverse supply chain. Types of structural relationships are ownership-based, service-contract, direct-order, deposit-based, credit-based, buy-back, and voluntary–based. There are four types of returned product collector and remanufacturer: Original Equipment Manufacturer (OEM), a third party (3PL), retailer, and remanufacturer. Discussion of the journal articles was presented in each category. After that, the structural relationship was explored to find its advantage and disadvantage, so that CLSC can be managed effectively and efficiently. As a summary, suggestions for future research were described as the result of the literature review conducted.
Sliding Mode Control System of Single Phase Buck-Boost Inverter with Buffer Inductor Purwadi Agus Darwito; Arief Abdurrakhman; Almas Fachrullah
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2015i1.1107

Abstract

Inverter is one of the primary components of a distributed electric power plants that serve as modifiers DC voltage into AC. In this research is applied of the Sliding Mode Control on Inverter Buck Boost One phase with Buffer Inductor. In the Open Loop test with the source voltage of 60 Volts, generate graphics output voltage in the form of a sinusoidal wave with maximum amplitude of about 400 volts. In the Closed Loop test, the graph output voltage can be controlled to follow a set point with SMC control method of order 2, and the resulting value Error Steady State smallest at 300 Volt, which amounted to 3.33%. The smallest sensitivity value of 0.29 when the input voltage changes by 32%.
A Japan compact bus terminal; Review on Hakata bus terminal, Fukuoka Khosyiatillah Hakim; Bart Julien Dewancker; Usep Surahman
IPTEK Journal of Proceedings Series No 3 (2017): 8th International Conference on Architecture Research and Design 2016
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2017i3.2453

Abstract

A mass transportation system has a main role in every development process of countries in the modern world. In Japan, transportation infrastructure such as train stations or bus terminals plays as an important node that determines the development of functions and other community activities in the surrounding area. Based on the compact city development concept, various types of transport infrastructure were constructed in the integrated area of city nodes and mixed with a various public and commercial functions and supported with a well-structured management of transportation systems. With the condition of limited land in the city nodes, transport infrastructure has to be built as a compact building. This paper reviews design and system of Bus Terminal in Japan from the architectural perspective with the issue of a compact building. As a study case, Hakata Bus terminal is one of Japanese bus terminal built with a slim building and vertically extended level without bus parking area. The platform was divided into three different floor levels with total ten building stories filled by various public and commercial functions. Time schedule, information system, people and vehicle circulation, and the other aspect become the main support to create a compact bus terminal. However, the commercial function is more prominent than the overall function of the building, thus making Hakata bus terminal does not show the typology terminal design in general. Overall, the terminal provides community services without ignoring the main function as a mass transportation system in a compact bus terminal.
Evaluation and Optimization of Cooling System for Generator and Bearing at Cirata Hydroelectric Power Plant Hariyanto Hariyanto; Ary Bachtiar
IPTEK Journal of Proceedings Series No 1 (2019): 4th International Seminar on Science and Technology 2018 (ISST 2018)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2019i1.5099

Abstract

Cirata hydroelectric is located in Purwakarta district, West Java, Indonesia. The cooling system is one of the main equipment in the hydroelectric generator that serves to cool the generator and bearing. In recent years, water quality has been a decreased in Cirata dam causing high levels of corrosion rate and abrasion of piping and heat exchanger equipment. Currently, the modification of the cooling system from open loop into closed loop at unit 1 has occurred. This study aims to optimize the closed loop cooling system in order to be able to serve all heat exchangers with better heat effectiveness and low cost. Second, it aims to evaluate the closed loop cooling system before and after optimization. The optimization analysis of the closed loop system was conducted by means of redesigning the shell and tube heat exchangers by referring to TEMA standards through tube diameter variations (1/2", 5/8" and 3/4"). These diameter variations aim to know the effect on heat transfer performance, such as the number of tubes, overall thermal transfer coefficient, total heat transfer surface area, and heat exchange cost. After obtaining the most economical design of HE (heat exchanger), the CBA evaluation of the closed loop cooling system was carried out through the NPV method. The results show that the larger used tube diameter decreases the number of tubes, while the heat transfer surface area increases as a result of the decrease in the overall heat transfer coefficient. The decreased number of tubes from 1/2" to 5/8" tube diameter is by 17.9% and the increased heat exchange production cost is by 2.18%. In case of the tube diameter increase from 5/8" to 3/4", a decrease in the number of tubes occurs by 7.9% and an increase in the heat exchange rate occurs by 4.07%. The total cost of the existing closed loop cooling system compared to the redesigned one decreases by 7.7%
Energy Profile of Faster-than-Light Particles : A New Approach to The Special Theory of Relativity Matradji Matradji; Tutug Dhanardono; Heri Justiono
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2015i1.1173

Abstract

It is known that neutrinos propagate faster than light. For that reason the Einstein’s special theory of relativity cannot be applied to these phenomena. On the other hand the Matscie’s special theory of relativity based on the Matscie’s transformation is valid for any velocity including the velocities greater than the velocity of light in free space. The relativistic phenomena consisting of the length contraction and the time dilation can be verified successfully by the Matscie’s special theory of relativity. In this case, the velocity of light in free space acts as the critical velocity. Only about 81.6% of the rest mass of a body can be converted into energy. At very low velocities, the kinetic energy of a moving body is practically the same as that in the classical mechanics. And also at velocities of much higher than the critical velocity, it almost reduces to the classical expression. For moderate velocities, the Matscie’s special theory of relativity reduces to the Einstein’s special theory of relativity. For velocities close to (below or above) the velocity of light in free space, the kinetic energy of a moving body differs from that predicted by the classical mechanics.
Sonication-Assisted Mitsunobu Etherification of Sterically Encumbered and Intramolecular Hydrogen Demanding Compounds: A Model towards Intramolecular MPV Reduction Reinner I Lerrick
IPTEK Journal of Proceedings Series No 4 (2017): 2nd International Seminar on Chemistry 2016
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2017i4.3065

Abstract

A steric and intramolecular hydrogen bonding controlled substrates has been successfully etherified towards sonication assisted Mitsunobu reaction. This modified alcohol-alcohol coupling reaction of 2-hydroxyacetophenone, substituted 2-hydroxyecetophenone, benzophenone and substituted benzophenones with (2R,4R)-pentanediol was found to be substrate electronic restraint
The design of optimum composition for skimcoat cement using mixture experiment (case study of PT.X) J Saragih
IPTEK Journal of Proceedings Series No 3 (2018): International Conference on Industrial and System Engineering (IConISE) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i3.3718

Abstract

The purpose of this research was to obtain the optimum composition of cement mixture skimcoat., cement skimcoat is a building material used to polish concrete building walls made of 2-3 mm thick, as an indicator of the quality obtained from the company is shown by compressive strength, with a range of 7-10 N / mm2. to obtain the indicator, the mixture of scimcoat cement consists of three stages, first stage / mixed one with a mixed material : water, latex and pigment, the second stage / mixture of two with the ingredients : white cement, CaCO3 and fine aggregate, for the third stage / mixture of three is composed of a mixture of one, a mixture of two and a polymer. the method used in this research is mixture experiment. where the experimental point is obtained by the formula of randomization 2p-1 and three repetitions so that each trial consists of 21 experimental points.The optimum composition obtained for one skimcoat cement sack weigthing 30 kg is comprised of water of 21.91%, latex 2,6%, pigment 1,78%, white cement 15,12%, CaCO3 2,41%, fine aggregate 27,58% and polymer 2,5 %
Investigation of Aqueous and Non-Aqueous Phase Liquids Migration in Fractured Double-Porosity Soil Loke Kok Foong; Norhan Abd Rahman
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2017i6.3298

Abstract

The issue of leakage from underground storage tank and spillage of contaminate liquids can contribute to the aqueous and non-aqueous phase liquids contamination into the groundwater, resulting in groundwater pollution and rendering the quality of groundwater unsafe for consumption. Ensuring availability and sustainable management of water and sanitation for all was the goal and target in the 2030 agenda for sustainable development, consisting of a plan of action for people, planet and prosperity of the United Nations. This paper is intended to investigate the aqueous and non-aqueous phase liquid migrations in the fractured double-porosity soil, which become important for sustainability of groundwater utilisation and a comprehensive understanding of the pattern and behaviour of liquid migration into the groundwater. For this aim, an experiment model was conducted to study the pattern and behaviour of aqueous and non-aqueous phase liquid migration in fractured double-porosity soil using digital image processing technique. Outcome of the experiments show that the fractured double-porosity soil has faster liquid migration at the cracked soil surface condition compared to intact soil surface. It can concluded that the factors that significantly influence the aqueous and non-aqueous phase liquids migration was the soil sample structure, soil sample fractured pattern, physical interaction bonding between the liquid and soil, and the fluid capillary pressure. This study demonstrates that the hue saturation intensity contour plot of liquids migration behaviour can provide detailed information to facilitate researchers and engineers to better understand and simulate the pattern of liquids migration characteristics that influence the groundwater resources.
Analysis of Ergonomics Risk Factors and Manual Material Handling Assessing Alternative Using Cost Benefit Methods Eko Nurmianto; Udisubakti Ciptomulyono
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.399

Abstract

This research to analyze the factors that cause risks of low back pain (L5/S1) on Manual Material Handling activities at raw material warehouse and finished goods warehouse. Objective is to determine the factors that cause low back pain (L5/S1), analyze the proposed improvement work system alternative with benefit cost ratio (B/C). The importance of cost-benefits analysis of ergonomics interventions has been emphasized (Tompa et al., 2009; Rivilis et al., 2008). Methodology by observing MMH working system, and distributing job discomfort survey. For the quantitative calculation used RWL, LI and Chaffin’s Model. The model of analysis shows the factor effected to RWL and LI is variable V (vertical distance), D (distance movement), and L (heavy of load). Examples of alternatives proposed : (1) addition of scissor of lift trolleys, (2) addition in amount of workers and (3) modifying of lifting method. Alternative whose the B/C value ≥ 1 are feasible economically to be used. Top management needs a cost-benefit analysis proving the positive outcomes. This economics evaluation showed that ergonomic intervention justifies the costs of the implementation, leading to positive outcomes.

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