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INSIST (International Series on Interdisciplinary Research)

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Published by Universitas Lampung

ISSN : - EISSN : 25028588 DOI : -

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INSIST is an International online journal which publishes innovative research papers and critical reviews in the field of engineering and interdisciplinary science researches. It focuses on but not limited to Electrical and Telecommunication, Mechanical Engineering, Chemical and Environmental Engineering, Civil and Architecture, Geophysics Engineering, Material Physics, Applied Sciences and Biomedical Engineering. The over-riding criteria for publication are the originality, scientific quality and interest to the interdisciplinary research.

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Articles 67 Documents

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Identication of Variance Moleculer Genotype Commercial Oil Palm (Elaeis guineensis Jacq.) based on Random Amplified Polymorpism DNA (RAPD) Markers Arnen Pasaribu; Lollie Agustina P.Putri; Dwi Suryanto
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract —Commercial oil palm is one of plant genotype have a inbreeding so that it will be genetic depression. Genetic depression can cause difficulties to identification of genetic trait in palm oil, so that identification of moleculer variance is necessary to know the genetic potential of commercial palm oil to obtain initial information about genetic diversity. The objectives of this study was to find genetic diversity in commercial oil palm (E. guineensis Jacq.) by using five RAPD primers (OPC-12, OPH-12, OPC-7, OPI-20 and OPD-16). The results of this study showed that Polymorpism Information Content (PIC) was 0.338. PCoA analysis showed that the moleculer varian was 43,72% and according to profil radial neighbour joining tree (NJtree) showed that three main groups. Keywords—Genetic Variation,Oil Palm , RAPD

The Influence of Change Load Against Fuel Cost in Coal-fired Power Tarahan Lampung Unit 3 and 4 Endah Komalasari; Rahmattulloh Rahmattulloh; Herri Gusmedi
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract—The operation of a power plant depends on fuel where fuel costs are incurred on a generating unit is a function of the plant load. The ability power plant carry the load determine the reliability of an electrical system, hence the power raised always be done equal to needs in side load all the time. Fluctuations demand of electrical power in side load will cause fluctuations change fuel cost. In this paper, the correlation both commonly called input-output characteristics of the power plant needs to be determined. These characteristics declared total input tons of coal per hour is used and net electrical output where the output power is available to the electric utility. One way to achieve this goal is to match polynomial regression on the data using a second order polynomial. This model allows the study of the incremental fuel cost resulting from a change load in a coal-fired power plant.Keywords—Coal-fired power, economic dispatch, incremental cost characteristics, input-output characteristics, second order polynomial regression.

Internet Traffic Measurement: Trends and Impact to Campus Network Gigih Forda Nama; M. Komarudin; Mardiana Mardiana; R Arum Setiapriadi; Hery Dian Septama; Meizano Ardhi Muhammad; Titin Yulianti
INSIST Vol 1, No 1 (2016)
Publisher : Universitas Lampung

Abstract— University of Lampung (Unila) is an Institution of Higher Education located in Bandar Lampung. Since 2016, Unila has deployed Internet Access Management (IAM) to guarantee the healthiness of the campus network, as well as to enhance the effectiveness of the bandwidth usage. This study focused on internet traffic measurement, conducted in Unila’s campus network during February 1 until February 29, 2016. Overall, this study shows user behavior on their application. The trend data of monthly most popular URL Categories accessed by users was; 1st Computers & Technology with 30032328 hits or 39.1%, the 2nd was Search Engines & Portals with 14214611 hits or 18.5%. There were around 30-40 % of internet traffic was use for Streaming Media activity, it proves that the existence of Streaming Media Activity in Campus Network which contribute to network congestion. During a month doing internet measurement, we identify the most active device/user that are the 1st was Aruba Wireless Controller with total traffic flow 40.45%, the 2nd was CCR-1 with 26.2%, the 3rd was CCR-2 with 16.9%, and the 4th was Digital Library Server with total flow was 0.6%. Monthly uplink traffic total flow was 5889.92 GB while downlink traffic total flow was 61041.35 GB. We made a recommendation to Unila management for implementing traffic provisioning especially on streaming media activity specific on access to Google Global Cache (GGC), to overcome network congestion during peak time period on working hours. Keywords—internet access management, internet traffic measurement; traffic trend

Risk Assessment Approach in Airport Security Mahardi Sadono; Saphira Alifa Harahap; Dani Yulianto Putra; Randhy Randhy; Muhamad Luthfi Imam Nurhakim
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

Naturally, the threat to flight is generated from all activities at the airport by passenger or freight. With the growth of air transport, the level of threat to flight activity will also increase. Due to ensure the security of passengers, staff, and all elements of the airport, the airport as a place of the flight operations need a reliable protection system. The purpose of this study is to develop a methodology for assessing the risk level at the airport in order to improve the level of protection at the airport. The level of threats that could jeopardize airport security is categorized into several levels, then analyzed to what extent the risk level can be tolerated as a reference to the formulation of standard protection systems at the airport. The results of this study can be used to deal with threats that occur in the airport through preventive action by setting up a reliable protection system. The risk assessment approach also able to evaluate the airport's existing protection system whether it is tolerable to deal with threats or not, so action can be taken to improve the protection system if the failure rate is still high and have massive consequences to the all airport elements.Keywords— airport security, failure rate, protection system, risk assessment, tolerable risk level.

Counting the Number of Disconnected Labeled Graphs of Order Five without Paralel Edges Wamiliana Wamiliana; Amanto Amanto; Grita Tumpi Nagari
INSIST Vol 1, No 1 (2016)
Publisher : Universitas Lampung

Abstract— Given a graph G(V,E) with n vertices and m edges, where every vertex is labeled, there are a lot of possible graphs that can be constructed, either connected graphs or disconnected, simple or not simple. A graph G(V,E) is called as a connected graph if there exists at least one path between every pair of vertices in G, and otherwise, G is disconnected. A graph G is called as a labeled graph if every node/vertex and or every edge is labeled. In this research, we are concerning about a graph where every vertex is labeled. Parallel edges are two edges or more which have the same end points. In this research we found that the number of disconnected labeled graph without parallel edges for and can be obtained with the following formula: {{. is the number of disconnected labeled graph without parallel edges for and . Keywords— counting graph, labeled graph, disconnected, parallel edges

Preparation and Characterization of NiMo/C Using Rapid Heating and Cooling Method for Renewable Diesel Synthesis from Nyamplung Oil (Calophyllum Inophyllum Oil) Bambang Heru Susanto; Muhammad Bagus Prakasa; Muhammad Husein Shahab
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract— The synthesis of metal nanocrystal was conducted by modification preparation from simple heating method which heating and cooling process run rapidly. By used NiMo/C 700 oC catalyst for 30 minutes which had surface area of 263.21 m2/gram, had 31.77 nm crystal size, and good morphology of material, obtained catalyst with high activity, selectivity, and stability. After catalyst activated, synthesis of renewable diesel performed in hydrodeoxygenation reactor at 375 oC, 12 bar, and 800 rpm for residence time of 150 minutes. The result of conversion was 81.99 %, yield was 68.08%, selectivity was 84.54 %, and spesification met the petroleum diesel standard.Keywords— Hydrodeoxygenation, NiMo/C, Nyamplung Oil, Rapid Heating and Cooling, Renewable Diesel.

Robust Estimation of Generalized Estimating Equation when Data Contain Outliers Khoirin Nisa; Netti Herawati
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract—In this paper, a robust procedure for estimating parameters of regression model when generalized estimating equation (GEE) applied to longitudinal data that contains outliers is proposed. The method is called ‘iteratively reweighted least trimmed square’ (IRLTS) which is a combination of the iteratively reweighted least square (IRLS) and least trimmed square (LTS) methods. To assess the proposed method a simulation study was conducted and the result shows that the method is robust against outliers.Keywords—GEE, IRLS, LTS, longitudinal data, regression model.

Strengthening of Nurul Ilmi Mosque with Concrete Jacketing Fauzan Fauzan; Febrin Anas Ismail; Siska Apriwelni; Imelia Faradiza; Zev Al Jauhari
INSIST Vol 1, No 1 (2016)
Publisher : Universitas Lampung

Abstract—Nurul Ilmi moesque is one of building for worship located in University of Andalas. In 2008 the new building of mosques was designed using previous indonesian seismic code, SNI 1726: 2002. The right side of the new mosque was constructied in 2009. Due to the limitation of the budget, the construction of the left side of the mosque was continued on 2014. However, a new indonesian seismic code SNI 03-1726-2012 was established and the designed mosque should be revised based on the new indonesian seismic code. Since the right side of the mosque was designed by using the old seismic code (SNI 1726: 2002), so it is necessary to evaluate the strength of the structure by using the seismic code (SNI 03-1726-2012). Based on the analysis results, it was found that the right side of the building structure is not strong enough to resist the combination loads acting on the structure, especially the earthquake load. Therefore, it is necessary to strengthening (retrofitting) the right side of the building structure before connecting with the left side of the building. In this study, the concrete jacketing method was used to the retrofit the column structure. The results show that the jacketing method is effective to increase the capacity of the column and reduce internal forces and displacements that occur in the structure of the mosque, so the structure can resist the working loadsKeywords—column, concrete jacketing, earthquake, displacement, strengthening.

Contributions of Enim Watershed in Production of Irrigation Rice Using Benefit and Cost Analysis Yuli Andriani; T.Yuri M. Zagloel; R.H. Koestoer; M. Suparmoko
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract— Population growth impacts on accumulating basic need. Basic foodstuff of Indonesia people is rice. The rice is derived from paddy field. The availability of paddy land use need to be maintained due to the continuously of supporting aspects ie water, paddy field. Therefore, it is necessary to manage rice crops to yield more production. Irrigation is one way to increase rice production. Irrigation plays an important role in the success of rice production. An important role of this irrigation should be assessed economically. The economic value of irrigation for paddy production needs to be studied. An important role of the irrigation should be assessed econmically. The economic value of irrigation for paddy production needs to be studied. Study of economic value is important so that people know that the irrigation water is an important contribution in the production of rice in addition to seeds, fertilizer and labor. It is necessary for economic calculation.This study aimed to quantify the economic value of watersheds to irrigate rice fields. Economic value calculation is conducted using benefit and cost benefit analysis on use of irrigation watershed in Cahaya Alam village. Muara Enim regency in South Sumatera of provinceKeywords— Enim watershed, irrigation, benefits and costs analysis

Financial Feasibility Study of Liquid Smoke Industry from Palm Oil Empty Fruit Bunch in Mesuji Regency, Lampung Province Erdi Suroso; Wisnu Satyajaya; Tanto Pratondo Utomo; Laila Julianti
INSIST Vol 2, No 1 (2017)
Publisher : Universitas Lampung

Abstract— The objective of this research was to examine the feasibility of liquid smoke production from palm ail empty fruit bunch (EFB). This research was a survey with expert respondents to collect primary data while literatures and reports study as secondary data. The result of study showed that the liquid smoke industry from EFB was feasible to be developed with eligibility criteria Rp. 991,486,765 of NPV ; 2.50 of Net B/C; 36.59 % of IRR ; and 2.83 years of PBP. The result of sensitivity analysis showed that the liquid smoke industry from EFB more sensitive for liquid smoke price decerasing than raw material and other inputs price increasing.Keywords— Financial Feasibility, Liquid Smoke, EFB.

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