Specta Journal of Technology
SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.
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<![CDATA[Analysis of Loading Change Effect to Boat Velocity on a 2.5GT Fishing FRP Boat with a Field Test ]]>
<![CDATA[Syerly Klara]]>;
<![CDATA[Faisal Mahmuddin]]>;
<![CDATA[Muhammad Muas]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
Publisher : <![CDATA[LPPM ITK ]]>
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DOI: 10.35718/specta.v2i1.89
<![CDATA[In order to determine the effect of load change to ship velocity on a 2.5 GT fishing boat, a field test is conducted in the present study. The boat model used in the field test is an actual size boat made from fiber reinforced plastic (FRP) material. The boat is powered by 2 (two) 15 HP direct drive engines each equipped with 3-bladed single screw propeller. Two loading cases are investigated and analyzed which are no load case and with load case. For each case, 4 (four) engine power variations are performed which are 25%, 50%, 75% and 100%. The main parameters measured are boat draught, engine power percentage, shaft revolution speed and boat velocity. From the field test, it is found that even though the propulsion performance increases larger loading and displacement, the increased boat resistance due to larger wetted surface make the boat velocity reduces.]]>
<![CDATA[Model Development for Decision Making in Vegetables Distribution in Kabupaten Malang ]]>
<![CDATA[Teguh Oktiarso]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
Publisher : <![CDATA[LPPM ITK ]]>
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DOI: 10.35718/specta.v2i1.90
<![CDATA[Food supply chain especially vegetables supply chain must consider the speed of the deliveries due to freshness of the product. Reduced of the freshness of the vegetables faces the great risk of great loss for the farmer and the greengroceries. This paper aimed to develop model for multi criteria decision making based on time to solve vegetables distribution problems from farmers to greengroceries in Kabupaten Malang. Model for decision support system is aimed to determine the minimize delivery time for main vegetables in Kabupaten Malang. There are three variables on three echelons which effects on delivery time before the vegetables decay and worthless. A model for decision support system using real data from 8 sub districts in Kabupaten Malang are obtained to describe the optimal result for several situations in vegetables distribution in Kabupaten Malang to support the decision for distributing the vegetables from farmers to greengroceries with lower cost.]]>
<![CDATA[Cloud IaaS Enterprise Architecture Design on Multiplatform Integrated Information System using Cloud Ecosystem Reference Model and TOGAF ]]>
<![CDATA[Setiyo Widayat]]>;
<![CDATA[M Suksrisno Mardiyanto]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
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DOI: 10.35718/specta.v2i1.91
<![CDATA[Currently Information Technology is increasingly needed by many organizations. Implementation of inappropriate IT in the organization will be a burden, even can hinder the development if not in accordance with the vision and mission of the organization. Weill and Ross also stated, 48 percent of companies that do IT investment cannot increase the expected value. A solid foundation in the execution process of IT implementation plays an important role in determining the success or failure of the company to achieve the desired goals. To build a solid foundation on the execution process of IT implementation, one of the important things to note is Enterprise Architecture (AE). Enterprise architecture provides a long-term view of the processes, systems and technologies in the company, so there is a harmony between business and IT both for now and for the future to achieve the desired goals. Currently the use of cloud computing technology increasingly used in organizations. Organizations typically have a variety of different platform integrated applications that are used to support their business processes. There are many frameworks used to build AE, but there is no AE framework specifically addressing AE design on cloud computing and supports multiplatform and cloud-based IaaS. This paper discusses the use of TOGAF and CERM to educational institution that have many integrated multiplatform applications. AE design that was built is validated by using Enterprise Realization Score Card (EARS) to assess whether it can be implemented well in the organization.]]>
<![CDATA[Forecasting Error Modelling for Improving PV Generation Prediction ]]>
<![CDATA[Happy Aprillia]]>;
<![CDATA[Hong-Tzer Yang]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
Publisher : <![CDATA[LPPM ITK ]]>
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DOI: 10.35718/specta.v2i1.92
<![CDATA[Accurate forecasting of Photovoltaic (PV) generation output is important in operation of high PV-penetrated power systems. In this paper, an adaptive uncertainty modelling method for forecasting error is proposed to improve the prediction accuracy of PV generation. The proposed method models the uncertainty in forecast data using Kernel Density Estimator and guarantee the provision of accurate expected value. Neural Network model is then constructed by the developed uncertainty model to forecast the PV output. The actual confidence level is traced within the day and injected as an input to the Neural Network model by observing the Mean Absolute Prediction Error (MAPE) and Unscaled Mean Bounded Relative Absolute Error (UMBRAE). The proposed method is tested with various significant changes of weather condition and proved to have promising performance on PV generation forecasting. Thus, the developed adaptive uncertainty model can be further used in power system planning that have high-penetration energy sources with stochastic behavior.]]>
<![CDATA[Glucomanan Extract From Salak Seed (Salacca edulis Reinw.) As An Alternative Material of Making Hard Capsule Shell ]]>
<![CDATA[Triana Yunita]]>;
<![CDATA[Dharmawan Yudha Rizky]]>;
<![CDATA[Utami Putri Rahajeng]]>;
<![CDATA[Kurniawan Fredy]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
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DOI: 10.35718/specta.v2i1.93
<![CDATA[This research studied about making hard capsule shell using glucomannan extract from salak seed (Salacca edulis Reinw.). The glucomannan extracted by using etanol 96% and aqua dm. The glucomannan that had been extracted will became KGM polymer that will be used for casting the hard capsule shell using petri cup. The results obtained by smashing the seeds of salak to be smooth with meat grinder and glucomannan extraction using 2 methods with etanol 96% and isopropyl alcohol. After extracting the seeds of salak seeds, the bacon seed flour is weighed and taken some samples to obtain the best composition, resulting in a film layer on a thick capsule shell like a capsule shell in general. The result of the printing on the petri cup is still a thin layer that can not be taken, but this proves that glucomannan contained in the seeds of salak able to produce lapisal film capsule shells with the right composition.]]>
<![CDATA[Analyze The Effects of Helical Baffles Angles Variation On Shell Side Heat Transfer Coefficient And Pressure Drop of Shell And Tube Heat Exchange ]]>
<![CDATA[Linta Atina Rahmah]]>;
<![CDATA[Devy Setiorini Sa’adiyah]]>;
<![CDATA[Sulistijono Sulistijono]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
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DOI: 10.35718/specta.v2i1.94
<![CDATA[E-201-11 is one of the components of heat exchanger which serves to increase the temperature of distillated crude oil before it going into the furnace. The use of segmental baffles on the heat exchanger causes dead zone. The fouling phenomenon that arises from the deposition of the compound content in the service fluid in dead zone can result in leakage of the shell and tube. It affects the performance of heat exchanger and production efficiency. The use of discontinuous helical baffle on the shell side minimizes fouling. Research on the variation of helical baffle angle by using Bell-Delaware method resulted in performance value of heat transfer coefficient and pressure drop on the shell side. Fluid flow behavior on the shell side with helical baffle was analyzed by Computational Fluid Dynamics (CFD). The fluid flow velocity is a factor that affects the value of heat transfer coefficient and pressure drop. Heat exchanger with an angle of 10º have fluid flow velocity of 0,893m/s resulting in the highest heat transfer coefficient and pressure drop value compared to angles of 15º and 20º with values of 585.725W/m²K and 13642.395Pa. The heat exchanger with helical baffle at 10° helix angle presents the best performance among the others variant helical baffles]]>
<![CDATA[Financial and Economic Analysis Irrigation Area Development Bajayu – Serdang Bedagai ]]>
<![CDATA[Mahliza Nasution]]>;
<![CDATA[Dedi Rahmad]]>;
<![CDATA[Rusyanto Rusyanto]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
Publisher : <![CDATA[LPPM ITK ]]>
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DOI: 10.35718/specta.v2i1.95
<![CDATA[Serdang Bedagai is one of the rice granaries in North Sumatera Province, but its agricultural potential has not been well managed due to lack of water for irrigation, especially in the dry season.With bajayu weir construction, is expected to improve water demand forclean water and irrigation for agricultural processes can be developed and managed bygood.The cost of construction of the dam construction is very large, so it needs to be reviewed if the benefits and income generated are proportional to the costs and losses incurred.The final goal of this research is to conduct financial and economic analysis in the construction of bajayu weir.This study uses financial and economic analysis using Net Present Value (NPV), Internal Rate of Return (IRR), Benefit cost Ratio (BCR) indicators and also analyzes sensitivity due to cost changes.Optimal handling is estimated after 10 years, so within that time the benefit increases linearly until the 13th year and will remain from year 13 to the next.From the calculation of finance development of bajau irrigation area obtained NPV = Rp.1.778.603.070.507,62-, IRR = 27%, BCR = 4.6.And from the economic calculation of the area of irrigation bajayu obtained NPV = Rp.1.235.038.404.979,95-, IRR = 32% BCR = 6.92.And calculation of sensitivity analysis has also been done to change of cost and benefit equal to ± 5% and ± 10% for financial and economic analysis indicate that project plan still very feasible.]]>
<![CDATA[Feynman Path Integral in Multiple-Slit and its Simulation ]]>
<![CDATA[Mahendra Satria Hadiningrat]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
Publisher : <![CDATA[LPPM ITK ]]>
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DOI: 10.35718/specta.v2i1.96
<![CDATA[In this article we hold on an analytic solution of the well-known cases of difraction and interference of electrons through one and two slits (simply that, the one-dimensional case is assumed only). In addition, we hold an approximations of the electron distribution which offer the interpretation of the results. Our derivation is based on the Feynman path integral formula and this work could also serve an awesome introduction to multiple slits interference. Then it is comparing between theoretical results and simulation in order to get interference pattern of it.]]>
<![CDATA[Analysis of Swirling Flow on Cyclone Separator Using CFD to Reduce Particulate Matter of Diesel Engine ]]>
<![CDATA[S. Nurcholik]]>;
<![CDATA[L. Adnyani]]>;
<![CDATA[D. Sa’adiyah]]>;
<![CDATA[L. Rahmah]]>;
<![CDATA[R. Revari]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
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DOI: 10.35718/specta.v2i1.97
<![CDATA[Particulate matter (PM) is one of the component in flue gas of diesel engine. As one of air pollution, PM needs more attention, because its existence irritates respiratory. The using of cyclone as additional part of diesel engine, can reduce PM concentration before released to surrounding. However, the shape of cyclone affects the percentage of PM due to turbulence and length of track. In this paper, the prediction of swirling flow in different type of cyclone separator will be conducted by using Computational Fluid Dynamics (CFD). The analysis will focus on particle movement inside the cyclone separator and its turbulence phenomenon. There are four types of cyclone separator which will be observed: Perry’s method, Stairmand’s method, and the modification of each methods. All of these cyclone separator will have the same velocity inlet, and will be simulated using RNG k- model as the turbulence modelling. The simulation shows that the Stairmand’s method has the best turbulence and can collect most of PM.]]>
<![CDATA[Analysis of Node in Wain River Protected Forest ]]>
<![CDATA[Nadia Almira Jordan]]>;
<![CDATA[Budiani Fitria Endrawati]]>;
<![CDATA[Ariyaningsih Ariyaningsih]]>;
<![CDATA[Healty Susantiningdyah]]>
<![CDATA[ SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology ]]>
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DOI: 10.35718/specta.v2i1.98
<![CDATA[HLSW is a natural tourist attraction that presents the scenery and experience of natural tropical rainforest exploration. The existing space in the HLSW area is not well ordered, especially in the public zone as the zone visited by more diverse visitors. This can be seen from main routes and some attraction nodes that are not in good condition. Node is the concentration of the area, which is the intersection of HLSW main pathway, the tracking post and attraction area as the activity center. A node must show the indigenous character and accommodate the visitor’s activity. It is necessary to analyze the HLSW node to obtain the type of activity and the condition of physical elements. Observation of the node by mosaic technique, which is to combine several single photographs to get the picture in a wide scope and to understand the role of each node. Results of this research are (i) All three types of nodes are exist in natural condition with very minimal facilities, (2) The number of facilities such as signage and other supporting furniture are not good in quality and not many in quantity, (3) The whole elements does not show HLSW character yet. This causes the concentration of the area to be less attractive and does not show its identity.]]>
