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Physicochemical & Microbial Characterization of Overripe Tempeh
Full text linkAbstract— Recent research showed potencies of overripe tempeh for development as condiment, and therefore, requirement of guiding parameters related to sensory properties. In this study, four samples of overripe tempeh from single source of soybean with different processing method were observed. All samples were characterized with comparable brown color (L* 52.96, a* 6.84, and b* 18.52), and total number of lactic acid bacteria (8.30 – 8.46 log CFU/g). All samples also have similar trends of protein and soluble amino acid content (50.32 – 61.77 mg BSA eq/g dry base, 357.39 – 418.78 mg tyrosine eq/g dry base) compared to fresh tempeh (62.43 mg BSA eq/g dry base, 71.70 mg tyrosine eq/g dry base). The findings indicated suitability of above parameters as guidance in target overripe tempeh for condiment ingredients. Observation of total microbial and total yeast and mould showed that these parameters were affected with production method of overripe tempeh.Keywords— Overripe tempeh, guiding parameters, microbial characterization, physicochemical characterizatio
Robust Estimation of Generalized Estimating Equation when Data Contain Outliers
Full text linkAbstract—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
Pet Plastic Bottle Waste with Reuse Approach as Interior Pre-Fabrication Modules for Interior Wall
Full text linkAbstract—PET plastic bottle is one of the main source of waste in big cities. This research aims to find out the possibility of reusing PET bottle as pre fabrication wall module material. The pre fabrication concept were offered so that in the construction phase, the instalation of this material will be fast, efficient, and able to minimalize the waste potential. The method to decided the PET bottle specimen was by surveying some sample location in Jakarta to found out the type and capacity of PET bottle waste. Bottle waste that has the highest volume, was selected to be the speciment for further experiment as pre fabrication modul. To determine the strength capacity of this material, some module variation were designed for compressive and flexural strength test. This research is a preliminary experiment to understanding the basic potential of PET bottle as building material. This research expected to support the use of PET bottle waste for other uses in building constructionKeywords— reuse, PET bottle, pre-fabrication, module
Preparation and Characterization of NiMo/C Using Rapid Heating and Cooling Method for Renewable Diesel Synthesis from Nyamplung Oil (Calophyllum Inophyllum Oil)
Full text linkAbstract— 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
Optimization Model of Fuzzy Rule Based Expert System Using Max-Min Composition and Schema Mapping Translation
Full text linkAbstract— Fuzzy Decision Making involves a process of selecting one or more alternatives or solutions from a finite set of alternatives which suits a set of constraints. In the rule-based expert system, the terms following in the decision making is using knowledge based and the IF Statements of the rule are called the premises, while the THEN part of the rule is called conclusion. Membership function and knowledge based determines the performance of fuzzy rule based expert system. Membership function determines the performance of fuzzy logic as it relates to represent fuzzy set in a computer. Knowledge Based in the other side relates to capturing human cognitive and judgemental processes, such as thinking and reasoning. In this paper, we have proposed a method by using Max-Min Composition combined with Genetic Algorithm for determining membership function of Fuzzy Logic and Schema Mapping Translation for the rules assignment.Keywords— Fuzzy Decision Making, Rule-Based Expert System, Membership Function, Knowledge Based, Max-Min Composition, Schema Mapping Translatio
The Influence of Change Load Against Fuel Cost in Coal-fired Power Tarahan Lampung Unit 3 and 4
Full text linkAbstract—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
The Conservation of Kali Pasir Jami’ Mosque in Tangerang, Banten
Full text linkAbstract—The aim of this study is to elaborate the conserving Kali Pasir Jami’ Mosque in Tangerang City, Banten Province that includes the participation of local communities. There is an initial conservation program proposed by the local government but it is not yet clear of how should the collaboration between communities who have done practical conservation and local government who slowly plans the conservation program. The lack of historical documentation of the building and unstructured research done by communities imply a potential threat to the conservation effort and loss of historical values of the mosque. This paper is the result of both qualitative and quantitative approaches such as observation and in-depth interviews in analyzing the conservation of the mosque. The finding of the research shows the important role of local communities in the sustainability of the mosque although there is also an urge to involve experts and government to create the right strategy in conserving the mosque.Keywords—conservation, Kali Pasir Jami’ Mosque, preservation
Inovative Design of Mattress by Using TRIZ and QFD
Full text linkAbstract–At this time the need for the design of a product is increased. Mattress is a necessity for every individual to rest. Preliminary studies of the function of the mattress stated that the use of the existing mattress found complaints (too large 72%, less attractive 40%, 80% less flexible, less comfortable 40%). Therefore, multifunctional mattress is needed. The purpose of this study is to propose a multifunctional design for a mattress. TRIZ method is used to determine the inventive principles of each attribute and QFD method is used to determine the design parameters of the mattress. Functions that can be developed from a mattress are that it can be folded, it can be a sofa / seating, into the table, flexible /easily removable and as the ironing board. The results of this study shows that the multifunctional mattress design was satisfied the customer feeling and emotion. Keyword–Mattress, TRIZ, QFD, Multifaction, Desig
Identication of Variance Moleculer Genotype Commercial Oil Palm (Elaeis guineensis Jacq.) based on Random Amplified Polymorpism DNA (RAPD) Markers
Full text linkAbstract —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 , RAP
Contributions of Enim Watershed in Production of Irrigation Rice Using Benefit and Cost Analysis
Full text linkAbstract— 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 analysi