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Heuristic
Published by Universitas 17 Agustus 1945 Surabaya
ISSN : 16938232     EISSN : 27231585     DOI : https://doi.org/10.30996/heuristic.v22i1
Core Subject : Engineering,
Engineering Industrial & Manufacturing Engineering
Jurnal HEURISTIC is published biannually, in April and October, by Industrial Engineering Department, University of 17 Agustus 1945 Surabaya. Jurnal HEURISTIC aims to: 1. Promote a comprehensive approach to industrial engineering incorporating viewpoints of different disciplines. 2. Strengthen academic exchange with other institutions. 3. Encourage scientist, practicing engineers, and others to conduct research and other similar activities. Scope of the Journal: Optimasi; Ergonomi; Manufaktur; Ekonomi & Manajemen; Logistics and Supply Chain; Data Mining; Analisa Keputusan.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 6 Documents
 1 
Search results for , issue "Vol 11 No 02 (2014)" : 6 Documents clear
KELAYAKAN INVESTASI PEMBANGUNAN CONVENTION CENTER DI KOTA MAKASSAR Suprawa, Tindra Adi
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.618

Abstract

The research was conducted to determine: (1) the value of the investment and appropriate management, (2) get the price of the room rental Convention Center and get a long time the most optimal cooperation with (3) investors Makassar City Convention Center construction using collaboration systems Build Operate Transfer (BOT). The results of this study were (1) Convention Center construction project requires investment of Rp 58.026 billion. Assuming a rate of 10% per year, it acquired the investment period of 13 years 9 months. Convention Center construction project is declared eligible to run. It can be seen from the value of NPV > 0 is Rp 4.490 billion, the value of IRR exceeds the expected interest rate is 11.58%, Break Even Point Convention Center rental business happened in year 8 over 2 months, precisely in 2021, ( 2) the optimal rental fee for each hour is Rp 6.5 million, (3) time of development cooperation with the investor Makassar Convention Center using a system of cooperation Build Operate Transfer (BOT). Based on a DPP, then the values obtained Discounted Payback Period (DPP) from businesses Convention Center is 13 years and 9 months faster than the 15-year investment period.Kata kunci: Convention Center, kelayakan, Build Operate Transfer
ASPEK MUTU PRODUK NATA DE COCO DENGAN PENAMBAHAN SARI BUAH MANGGA Sihmawati, Rini Rahayu; Oktoviani, Devy; untag, Wardah
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.619

Abstract

Making nata de coco is one of the way to use waste from coconut water which can not be used so that it can decrease the environment polution . Mango is the fruit which can be found in Indonesia , with high nutrition that can be used for many variation of foods. One of them is fruit juice, that can be added from making nata de coco so that it can be hoped to increase the nutrition value of nata de coco by using Acetobacter xylinum bacteria.The purpose of the research is increasing nata de coco nutrition value with phisical factor ( texture and thickness),also the chemistry factor ( pH and vitamine C content) and sensoric factor / organoleptic ( taste, colour, and flavour).The reseach design which is used for complete random design which consist of 3 treatments using mango juice 6 trial test. The first treatment ( S1) = 15%, the second treatment (S2) = 30%, the third treatment (S3) = 45%.The research result showed that the adding treatment of fruit juice to the pH accid degree, vitamine C , and the nata thickness showed significant influence. For sensoric test / organoleptic in the taste result and flavour showed significant influence while in the colour test there is no influence.Kata kunci: air kelapa, sari buah mangga, nata de coco, Acetobacter xylinum
PEMBANGUNAN DIGESTER GASBIO GUNA MENANGGULANGI GEJOLAK SOSIAL MASYARAKAT SUKODONO SIDOARJO Yuwono, Istantyo; Sidqon, Moch.
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.615

Abstract

The unpleasant smell of dung fly everywhere, dirt strewn everywhere be a factor for the emergence of social conflict surrounding of cow breeding. Biogas digester in the form of a closed tube can be used for cow dung that is no longer scattered and the scent is not pleasant been isolated. Not only that bio-gas produced can be used together with the communities around the farm, which in turn not only relieve social turmoil but rather strengthen the social fabric. Now they jointly maintain and care for the sake of expediency digester together. Bio-gas digester constructed is fixed dome models (fixed dome) with capacities of 10 m3 of manure. It means being able to accommodate dirt 10-15 cow. After 60 days of curing in the tube digester, biogas digester turns is able to produce enough gas used for cooking purposes 15 families around the farm together.Keywords: digester, biogas, cow breeding, social conflict
RANCANG BANGUN ALAT PEMILIN TAMPAR PELEPAH PISANG DESA KADUNGREJO KECAMATAN BAURENO KABUPATEN BOJONEGORO Mundari, Siti; Yuliaty, Erma; Arief, Zainal
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.620

Abstract

Kadungrejo village situated on the banks of the Solo River. This village is a village predominantly fertile rice growing are effective only harvest once a year because the flooded Bengawan Solo almost certainly occur every year. Majority of the population live on less prosperous regions. While the non-rice crops that are often found in yards and houses along the banks of the Solo River are banana plants. Banana plants are very many benefits. In addition to fruit and leaves are also the sheath.During this banana thrown away because they are not any good or just a waste. New 10 years ago because of the demand of stem of the banana bunch, the villagers Kadungrejo banana processing into economically valuable goods which are sold for sale. Villagers Kadungrejo very grateful because it can be used to make a living. During this time the problem occurs is the inability of the population to be able to meet the demand of collectors slap.The inability of the population to be able to meet the demand because they do slap on the sidelines of time and equipment to wring so simple that it takes a long time. Average population can only produce less than 10 kg slap in 1 day. Though slap banana production process is not too complicated. With the use of existing tools, slap the resulting average diameter no less so in accordance with the request that resulted in a low slap appreciated. Besides, existing tools make tired quickly so that the results obtained little slap and slap on the side of making less can be optimized.Kata Kunci: Pelepah pisang, alat pemilin
PERENCANAAN PRODUKSI UNTUK MEMENUHI PERMINTAAN DENGAN BIAYA YANG OPTIMAL Sawargo, Andre Leonard; Mundari, Siti
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.616

Abstract

The final task is to give consideration to the company to add crumble pellet machine in an effort to increase production so as to meet the demand. In completing this final project used several techniques to compare the economic methods addition of new machines, and production planning.Worth Annual method to determine the annual value of an investment and summed with the cost of production and comparability with the cost of production without new investment. HoltWinter forecasting method to forecast the demand for 1 year. And after that calculates the cost of production when using the addition crumble pellet machine and do not use the machine additions crumble pellets. Smaller production costs are selected.
POTENSI EKSTRAK BUNGA ROSELLA (Hibiscus sabdariffa L.) SEBAGAI PEWARNA DAN PENGAWET ALAMI PADA JELLY JAJANAN ANAK Handarini, Kejora
Heuristic Vol 11 No 02 (2014)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/he.v11i02.617

Abstract

Jelly is a highly preferred snack of children, but was reported that jelly products sometimes containing a non food grade dyes and harmful preservatives, whict is’s used for textile processed usually. Rosella flower extracts was containing antibacterial activity such as alkaloid, saponin tanin, and high anthocyanin that could be nature dye. The purpose of this study is to determine how the optimal concentration of roselle flowers extracts can be applied to jelly as a natural dye and preservatives. The methods were: a. extraction of rosella flower. b. application of an extract rosella flower onto the jelly product (the treatments are A0: 0 %A1 : 0.5 % , A2 : 1 % , A3 : 1.5 %) and then storage at refrigeration temperature for 0, 5, and 10 days .Parameters measured were the Total Plate Count (TPC), total mold-yeasts, total coliforms, and product color observations. The results showed for the storaging in 0 to 5 days, roselle jelly with various concentrations have indigenous microbial contaminants (the TPC, mold- yeasts and coliforms) is smaller than the control ( A0: 0% ). While the 10-day storaged, the TPC values , molds - yeasts and coliforms in jelly with roselle extracted was lower than controls, but for all treatments had an exceeding value than the microbiological standards. The results of colour with organoleptic test showed for 0 to 5 days of storage refrigerator, showed that roselle jelly A3 ( 1.5 % ) has the best value compared to other treatments, the value of a little love to love ( and its value is higher than controls). On the 10th day of storaged, for the treatment of roselle jelly A1, and A2 has a value of color under control, while the A3 is equal to the control. Based on the microbiological and organoleptic tests, the best roselle jelly is A3 sample and 5 days storaged in the refrigerator.Kata Kunci: Rosella, pengawet alami, pewarna alami, jelly

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