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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 102 Documents

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El Von Bertalanffy and Mortality from Fish Kurau (Polynemustaenitatus) of The Catch Fisherman in Waters Bunyu Gazali Salim; Pius Bae Kelen
INSIST Vol 3, No 2 (2018)
Publisher : Universitas Lampung

The aim of the research are analyzing the growth model using Von Bertalanffy and mortality in Polynemus taeniatus. Research methods a descriptive kuantitatif by using the case study. Determining the location of sampling are purposive sampling, by following fishing boats Drift Gill Net. Sampling funded every two weeks once upon a huge tide. Data collection techniques using survey. Data retrieval in the form of total length and total weight. The samples from 4 (times) for 3 months. Each sample taking having vulnerable time between 2-5 day in bunyu waters. Research results use the model von bertalanffy obtained maximum length fish kurau (p.taeniatus) is 156,794 cm in 349 days. Value K of 0.0364 cm. Value To of -1,2819 cm. The results of data processing of fish catch kurau (P.taeniatus) obtained by mortalitas natural 0,435; mortalitas total of 1.121; mortalitas arrest of 0,6859; the exploitation of fish kurau 0,61.

Anaerobic Wastewater Treatments: Prediction of Retention Time on RT/RW Plant Dessy Agustina Sari; Sukanta Sukanta; Azafilmi Hakiim
INSIST Vol 3, No 1 (2018)
Publisher : Universitas Lampung

Wastewater treatment gave major problem in higher of chemical oxygen demand that backgrounded by amount and type of PT RT/RW products. The waste was polymer, mixture of nitrogen, mixture of phosphate, and oil. This factory used active sludge and microorganism (anaerobic condition). Research result showed that pH ranged 4,94 until 8,02. This data gave a decreasing sharply in acidic condition. The thing could be caused acetogenic phase in area pond anaerobic. The phenomenon might be recited because possibility of biologist living this waste did not take place as well and or could give deathly affect to the anaerobic bacteria. Customary pH for the bacteria was 6,8 – 7,4. Temperature data reached 28-33oC so their activities were good. Then, efficiency of anaerobic wastewater treatment was 62,95 to 66,06%. The data indicated that the research was not accordance with SOP companies. Inlet concentration of chemical oxygen demand had variation and gave unbalancing affect to digestive bacteria load. Estimation to get valid COD was 11-14 days. The duration was required by the microorganism to digest the matter organic perfectly to be methane and carbon dioxide gas.

Rice Supply Patterns in Kalimantan Selatan: Part of solution for regional food security Arief RM Akbar; Alan Dwi Wibowo; Alia Rahmi; Sigit Prabawa
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

South Kalimantan is a largest rice producer in Kalimantan island. More than five years its rice met by their own production, moreover it has supplied to other area such as Kalimantan Tengah, Kalimantan Timur and Kalimantan Utara. In many studies, rice stocks play a critical role in determining the regional’s food security. In recent issues, rice stocks has a wide impact on an array of economic, political, societal stabilities. Unfortunately, most of the land in Kalimantan Selatan is classified as wetlands, where the land productivity is low. Therefore, this study analyzes rice supply patterns in Kalimantan Selatan in order to provide policies development toward rice self-sufficiency. This research is using system dynamics approach to explore the system which then develop any alternatives of rice policies. Eventually, this study provides evidences for the need to consider rice supply system in the regional’s food security policies.

Financial Feasibility Analysis of Red Chili Pepper Seedling at Karanganyar, Poncokusumo, Malang Dyah Erni Widyastuti; Jabal Tarik Ibrahim; Aris Winaya; Henik Sukorini
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ins.v4i1.188

This research aims to analyse financial feasibility of red chili peppers (Capsicum annum L.) seedling business conducted at Karanganyar, Poncokusumo, Malang. The respondents were farmers who breed red chili peppers and the data collected from March to April 2018. The primary data was collected through interviews based on structure questionnaire to obtain information from selected farmers in the study area. The qualitative study is utilized to analyse the financial feasibility based from Net Present Value (NPV), Internal Rate of Return (IRR), Net Benefit-Cost Ratio (BCR), and Payback Period (PP). This study findings showed a positive NPV (IDR 15403419), IRR is 23.19%, Gross B/C is 1.05, Nett B/C is 1.13, BCR > 1 (1.05), and PP as 19 months. Despite the costly investment and development, the red chili peppers seedling business is financially feasible

Analysis of Stability, Resistance, and Seakeeping Accord to Dimension and Form of Fishing Vessel 10, 20, 30 GT Rizky Irvana; Arif Fadillah; Shanty Manullang; Fridolini Fridolini
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

Fishing vessels used to catch resources from the sea has to pass some of the regulations from International Maritime Organization for sea-worthiness of the vessel especially about stability, resistance to acquire the highest velocity, and the vessel’s motion. This research discusses the effect of the vessel’s dimension and the hull shape by using the stability standard from IMO.The result shows that the ratio of the B/T which meets the stability criteria is 2.50 with the ratio of KG/H of the vessel is 0.65, with the assumption that the KG and H of the vessel are more than 0.70. Whereas if the resistance ratio B/T is big, the resistance for the vessel will be relatively smaller. In terms of the vessel motion, a vessel with a V-type hull will better than a U-type hull in seakeeping.

Antibacterial Activity of Ethanol Extracts of the Zingiber zerumbet (L.) Smith Rhizome Against Salmonella sp. Rahayu, Imbang Dwi; Widodo, Wahyu; Prihartini, Indah; Winaya, Aris
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ins.v4i1.191

The study aimed at investigating the antibacterial activity of ethanol extracts of the lempuyang Gajah (Zingiber zerumbet (L.) Smith) rhizome against S. enteridis ATCC 31194 and S. typhimurium ATCC 23564. An experimental method was employed for testing the antibacterial activity, with a completely randomized design (CRD) of factorial patterns. Factor I, ethanol concentrations which consisted of 45%; 70% and 95%, while factor II was the concentration of extracts, i.e 0%; 2.5%; 5%; 7.5% and 10%. The results showed that extraction with 45% and 70% ethanol, Z. zerumbet contained alkaloids, tannins, terpenoids, and saponins; however, the-95%-ethanol did not result any saponins, but flavonoids instead. Meanwhile, the chromatogram patterns of all extracts showed zerumbone is a dominant compound. It was concluded that the Z. zerumbet (L.) Smith extracts with 95% ethanol solvent, and 10% concentration had the highest antibacterial properties against S. enteritidis.

Development of Horticultural Supply Chain with Value Co-Creation to Improve Farmers' Competitiveness and Incomes Muhammad Azka; Arfina Samangi; Muhammad Naufal; Tomy Perdana
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

Vegetables are one of the horticultural commodities that have high economic value and opportunity in the market. However, vegetables supply chain in Indonesia is often identified with the traditional supply chain of long marketing chains, difficult market access for farmers, low competitiveness, farmers’ low income, and injustice to supply chain actors, especially between farmers and wholesalers. In creating a structured supply chain, value co-creation intervention applied to synergize farmers and wholesalers in Ciwidey Sub-district to understand each other’s problems then seek solutions to solve them. This research has been conducted in Ciwidey Sub-district, West Java. This research aims to measure the competitiveness and farmers income of each wholesaler’s group before and after value co-creation intervention. The result shows that variables competitiveness and income of Sari Hejo Farmer Group and Hidayah Alam Farmer Group have significant positive changed, while one of three indicator variable of competitiveness has not significantly changed.

GUI Design for Comparative Output Signal DFT and DTFT with LabVIEW Dwi Astharini; Tsaura Aulia; Putri Wulandari; Rahmat Alamtaha; Rifqy Afisha
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

An application GUI (Graphical User Interface) is designed as a software simulation to compare the output signal of DFT and DTFT. DFT (Discrete Fourier Transform) and DTFT (Discrete Time Fourier Transform) are part of the digital signal processing. Digital signal processing is an analog signal processing method uses a mathematical technique to perform a transformation or retrieving information in digital form. One of the benefits of digital signal processing is to facilitate the representation of the signal, because the signal in digital form will be more visible, easily processed and has high accuracy. This GUI application designed using LabVIEW from National Instruments. LabVIEW is a software graphical programming or a block diagram. LabVIEW program known as VI or Virtual Instrument. The input signal in this application is a square signal

The Application of GPS (Global Positioning System) and SMS Gateway on Hepinar “Helm Pintar” Arduino Microcontroller Based as a Post-Accident Solution Malikul Fanani; Kukuh Priambodo; Iklil Sulaiman; Sumardi Sumardi
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

In Indonesia, the number of death of accident is still pretty high with most of 70% the traffic accident is motorcycle driver who is late in getting aid and the head injury is the first order of all types of experiencing by the accident victim. Prehospital Care is an emergency service when the victim is firstly found, during the process of the transportation until the patient arrives at the hospital Thus, the purpose of this research is the application of GPS (Global Positioning System) and SMS gateway on the safety helmet in order to increase the aid post-accident. The application of GPS has an advantage to receive data from the satellite which next will be stored on arduino microcontroller. Microcontroller will retrieve the driver location data in the forms of latitude, longitude and time. Next, the driver location will be sent by microcontroller via SMS gateway service to the nearest hospital and the victim's family to make the evacuation process easy. This research is tested along the travel of Jember-Lumajang regency. The result of this research is the GPS application on the safety helmet can be applied well. The transmission of driver position coordinate data if the accident happened via sending media of SMS can be applied along with GSM signal from the provider so that the SMS sending works well.

Bitcoin mining, the way to process transaction information or the way to make money? Jiangdong Cao; Wei Cao
INSIST Vol 4, No 1 (2019)
Publisher : Universitas Lampung

Bitcoin is a crypto currency introduced by Satoshi Nakamoto in 2008. It has the features of decentralization cross-border and fixed total amount and has become one of the most widely used crypto-currencies. Bitcoin, as a new digital currency system, innovatively makes the use of cryptographic elements and consensus mechanisms and builds up a secure decentralized system. The Blockchain, as the core of Bitcoin, uses peer-to-peer network communications and backs up transaction data in every node of the system, thus creating a huge distributed public book. It is essentially a decentralized distributed ledger database, and the decentralization means that the transaction is broadcast to the entire network, where everyone is involved in book keeping. In order to make every participant in the Blockchain willing to participate in the bookkeeping, the reward mechanism of the Bitcoin system is mining. This article first introduces the concept of Blockchain technology, then expounds the principle and the operation mechanism of the Bitcoin and the Bitcoin mining principle, introduces an example of Bitcoin mining in-depth study and analysis, finally, summarize and prospect the development of the Bitcoin mining.

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