Indonesia Conference Directory

Corresponding Author
Netty Kusumawati

Institutions
a) Faculty of Agricultural Technology, Universitas Brawijaya, Jalan Veteran, Malang 65145, Indonesia

b) Department of Food Technology, Faculty of Agricultural Technology, Widya Mandala Catholic University Surabaya, Jalan Dinoyo 42-44 Surabaya, Indonesia 60265
*) nettykusumawati[at]gmail.com

Abstract
The objective of this research was to isolate, screen, and identify the cellulase and xylanase-producing mold from oil palm waste. There are thirty-two isolates from oil palm waste which are able to degrade and grow on media containing cellulose or xylan as a sole carbon source. Screening to determine cellulolytic and xylanolytic activity was performed by paper disc diffusion method using Congo Red as an indicator. All the thirty-two mold isolates showed cellulolytic and xylanolytic activity with relative enzyme activity (ratio of hydrolyzed zone diameter and colony growth diameter) ranging from 1.04 to 1.62. Based on the macro- and micromorphology characteristics, these isolates were identified as genus Trichoderma, Aspergillus, Rhizopus, Tallaromyces and Penicillium, with the number isolates in each genus was 22, 4, 3, 2, and 1 respectively. The highest cellulolytic and xylanolytic activity was achieved from the isolate namely OPT1(4) which was identified as Talaromyces pinophilus using morphological and molecular analysis. Under the optimum condition (300C, 72 hours) in liquid medium containing carboxymethyl cellulose (CMC) and birch wood xylan as the main carbon source, Talaromyces pinophilus OPT1(4) presented glucanase and xylanase activity of 15.17 U/ml and 13.35 U/ml, respectively.

Keywords
mold, isolation, identification, cellulolytic, xylanolytic

Topic
INDUSTRIAL BIOTECHNOLOGY AND BIOPROCESSING

Link: https://ifory.id/abstract/6ucK9FQCvNaB

Corresponding Author
Mahesti Kusdiastuti

Institutions
(a) Master of Science Education, Universitas Mataram, Jl. Pendidikan No. 37, Mataram 83114, Indonesia
(b) Physics Education Study Program, Universitas Mataram, Jl. Majapahit No. 62, Mataram 83125, Indonesia
(c) Physics Education Study Program, IKIP Mataram, Jl. Pemuda No. 59A, Mataram 83125, Indonesia

*gunawan[at]unram.ac.id

Abstract
The combination of guided inquiry learning models combined with advanced organizers is needed to facilitate students who have diverse initial abilities so that they can participate in inquiry activities well. The purpose of this study is to produce a physics learning device in a guided inquiry model that is combined with an advance organizer, who has valid, practical, and effective criteria in improving students understanding of the physics concept. The learning tools testing phase was carried out in the class X in one of the high schools in the Mataram, using one group pre-test post-test design. Observation and concept understanding tests do data collection. The results of the study show that: Learning tools developed are valid; The practicality of learning tools was tested through the implementation of physics learning by the guided inquiry model combined with advance organizer, and the effectiveness of the learning tools can increase student understanding of physics concepts. These results indicate that the learning device developed has valid, practical, and effective criteria to increase student- understanding of the physics concept.

Keywords
Advance Organizer; Guided Inquiry; Learning Tools; Understanding of Concept

Topic
Physics Education

Link: https://ifory.id/abstract/98R2JxVq4Pbn

Corresponding Author
NISSA CLARA FIRSTA

Institutions
a) Department of Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Brawijaya, Malang 65145, Indonesia
*nissaclarafirsta[at]gmail.com

Abstract
Crude Palm Oil (CPO) is one of vegetable oil obtained by extracting palm fruit mesocarp and has a red color because of the high content of beta carotene. Other bioactive ingredients in CPO include Vitamin E, squalene, and phytosterol found in the unsaponifiable fraction. To obtain multi-component bioactive, a saponification and extraction process is needed. Saponification generally uses strong bases, there are sodium hydroxide and potassium hydroxide. The use of sodium hydroxide as a base catalyst can produce vitamin E and phytosterol which is higher than potassium hydroxide. The use of potassium hydroxide as a base catalyst is able to produce higher yields, beta carotene, and squalene compared to sodium hydroxide.

Keywords
CPO, Saponification, Sodium Hydroxide, Potassium Hydroxide, Multi-Component Bioactive Compounds

Topic
AGRICULTURAL PRODUCT TECHNOLOGY

Link: https://ifory.id/abstract/4PUrf3vKhCLd

Corresponding Author
Asih Mardati

Institutions
Universitas Ahmad Dahlan

Abstract
The aim of the study was to determine the effectiveness of product development in the form of mathematical modules with a guided discovery approach in terms of motivation and learning achievement of UAD PGSD students. Guided discovery approach is a method that involves students in an optimum way to find formulas and theorems, while educators provide guidance to students who have difficulty. This type of research is a quasi-experimental study with pretest-posttest nonequivalent comparison-group design. The group used in this study consisted of two groups, namely the experimental group and the control group. Based on the calculation in the attachment, the value of t count is 5.37. The calculated t value obtained is greater than ttable = t0.05; 28 = 1.701 so Ho is rejected. Thus it can be concluded that at the 5% significance level, approach is the guided discovery effective in terms of student learning achievement. Based on the calculation in the attachment, the value of t count is -1.805. The calculated t value obtained is smaller than ttable = 1.701 so Ho is not rejected. Thus it can be concluded that at the 5% significance level, approach is the guided discovery not effective in terms of student learning motivation. It can be concluded that mathematics learning with a guided discovery approach is effective in terms of student learning achievement, but is not effective in terms of student learning motivation.

Keywords
Effectiveness, Mathematical Modules, Guided Discovery Approach, Motivation, Achievement

Topic
Mathematics Education

Link: https://ifory.id/abstract/xKGu6NV4cEWD

Corresponding Author
Dwi Novanda Sari

Institutions
a) Bachelor Science of Agroindustrial Technology, Brawijaya University, Malang, Indonesia
*dwinovandas[at]gmail.com
b) Department of Agricultural Engineering, Brawijaya University, MalangIndonesia

Abstract
The increasing of food demand in Indonesia affects farmers to use chemical fertilizer in order to increase agriculture productivity. However, chemical fertilizer could cause land fertility degradation when continually and inefficient use. One of solutions to overcome this problem is by using organic nanofertilizer that can be made from fish feed industrial waste which is abundant and unutilized. In addition, processed by sonication using ultrasound technology to speed up protein degradation. The aim of this study was to observe the effect of sonication temperature and time on protein degradation of fish feed industrial waste as raw materials of organic nanofertilizer. In this work, completely randomized design factorial with two factors were used. The first factor was temperature (40°C, 50°C and 60°C) and the second factor was time (45, 55 and 60 minutes). The effect was examined by protein solubility, percentage of nitrogen, phosphor, sodium and organic carbon. The best treatment was chosen, then compared with control (no treatment) based on pH, DO, BOD and particle size measurements. The result has shown that all factors and interaction between them have a significant effect on protein degradation of waste, but percentage of nitrogen, phosphor, sodium and organic carbon did not change significantly upon the sonication treatments. Major impact had treatment with 60°C for 65 minutes. It affected in decreased particle size but stay constant in value of pH, DO and BOD.

Keywords
Sonicationin, Protein Degradaion, Organic Nanofertilizer

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/VTvnzQuZ2g38

Corresponding Author
Irfan Muhafidin

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to analyze the completion of contextual math problems of deaf children based on Montague stages. this research is descriptive qualitative research. the data collection technique is in the form of tests, questionnaires, and interviews. The subject of this study was deaf class XI students in one of the Special Schools (SLB-B) in Kuningan, Indonesia. The results of this study are the students ability to solve contextual math problems from 7 students namely one student has the ability to solve contextual math questions in good categories, three students in sufficient categories, and three others in the low category.

Keywords
Contextual Mathematical Questions, Qualitative, Montague Stages

Topic
Mathematics Education

Link: https://ifory.id/abstract/PNcLD3HtTBnd

Corresponding Author
Firman Jaya

Institutions
(a) Department of Animal Products Technology, Faculty of Animal Science, University of Brawijaya, Jalan Veteran, Malang 65145, East Java, Indonesia

(b) Department of Animal Production, Faculty of Animal Science, University of Brawijaya, Malang 65145, East Java, Indonesia

(c) Alumni Department of Animal Products Technology, Faculty of Animal Science, University of Brawijaya, Jalan Veteran, Malang 65145, East Java, Indonesia

Abstract
Honeybee can produce bee bread beside the most famous commercial products i.e. honey, propolis and pollen. These products are widely believed to have medicinal benefits. However, there are very few scientific data available on the honeybee-s product to prove the claims. In this study, bee bread from different species honeybee, namely Apis mellifera, Apis cerana, and Trigona spp were evaluated as antioxidants and natural antimicrobial agents. Bee bread from Apis cerana exhibited the highest antimicrobial activity, followed by Apis mellifera and Trigona spp. Meanwhile, bee bread from Apis cerana showed high antioxidant activities as radical scavenger, total flavonoid and todal phenolic. These findings establish the potential of bee bread from Apis cerana as antioxidants and antimicrobial agents, promising natural food supplements and natural preservatives.

Keywords
Apis mellifera; Apis cerana; Trigona spp; radical scavenger; antimicrobial activity

Topic
AGRICULTURAL PRODUCT TECHNOLOGY

Link: https://ifory.id/abstract/JxVnLrE6Bzg3

Corresponding Author
Ari Permana

Institutions
a) Student of Biology Education Study Program, School of Postgraduate Studies, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*ari.permana[at]upi.edu
b) Department of Biology Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This preliminary research aim to give description about students- perception towards field study or about the reasons for students like or dislike field study activity which has been occured at schools and the potency to conduct field trip learning. This research used quantitative survey research method with deep explanation. The data collection used questionnaire and interview. The statements in the questionnaire were open and close statements, which showed positive and negative perception with 5 point-Likert scales. Numeric indices of appreciation of field study were determined using questionnaire information from 19 students in 12th grade. The result show that out of 19 respondents, most of them express positive perception towards field study with average indices = 57.06 (range 45.45 – 81.82; with standard deviation = 8.48). The students- positive perception towards field study activity implies can give impact toward field skills acquisition such as identification or classification skills, monitoring or sampling or survey skills, teamwork skill, and problem-solving skills in the field.

Keywords
students- field study, fieldwork, field trip, biology education

Topic
Biology Education

Link: https://ifory.id/abstract/kbgMU4fYPa3h

Corresponding Author
Ardaneswari Dyah Pitaloka Citraresmi

Institutions
1. Departement of Agro-industrial Technology
Faculty of Agricultural Technology
Brawijaya University
Jalan Veteran, Malang, 65145, Indonesia

* ardaneswari[at]ub.ac.id

Abstract
Soy sauce is one of the fermented soybean products that is widely used as a food flavoring because it has a distinctive taste and aroma. The high demand for soy sauce requires Company X as one of the soy sauce producers in Indonesia to ensure that consumer needs are always met. Therefore, company X need the help of many stakeholders, including suppliers and distributors to support the continuity of production. These stakeholders are interconnected in a supply chain system. With the many members involved in that supply chain system, company X needs to maintain optimal performance, one of which is by applying supply chain risk management. The aims of this study are to identify and analyze supply chain risk in the soy sauce production process in company X. Firstly, all activities carried out by supply chain members are mapped using the Supply Chain Operational Reference (SCOR) approach. Secondly, the potential risk of these activities was analyzed using the House of Risk Phase 1 (HOR-1) method. 21 risk events and 19 risk agents have been identified based on the SCOR approach and HOR-1 method. Furthermore, the results of risk identification are analyzed using the Aggregate Risk Potential (ARP) method to obtain a priority rank of risks. The results show that there are 5 priorities of risk agents that need to be mitigated, namely human error, products that are not in accordance with orders, power outages, variations in raw materials, and disruptions during product delivery.

Keywords
ARP, HOR-1, Risk management, SCOR, soy sauce.

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/QLdCZ4v8Pq9G

Corresponding Author
Wijil Septiandari

Institutions
a) Pendidikan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
b) Departemen Pendidikan Biologi, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
c) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
One of the purposes of science education is to create a better future generation who is able to face and solve globalization-s problems in order to improve their quality of life. Being creative is one of the efforts to achieve that purpose which creativity is one of 21st century skill that should to develop. As a science teacher is needed to have responsibility provide students with an excellent education in the 21st century. There is framework for teacher and prospective teacher called TPACK, it can be used to improve quality and skills for teaching. Therefore the aim of this study is to analyze TPACK teacher to foster students- creativity. This study was conducted in one of junior high schools in Bandung. The subject of this study was 45 students. The learning approach to foster students- creativity used by teachers was STEM. Students asked to make solution with creating product that will solve the problem given. Creative product made by students measured by using rubric based on Bessemer and O-Quin. Based on result the process of fostering students creativity has been facilitated well, which can be seen from the learning process experienced by students, through suitable implementation of strategies and approaches in the classroom

Keywords
TPACK; Creativity Product; STEM ; Sound Wave

Topic
Science Education

Link: https://ifory.id/abstract/nQRwxVrWJgL2

Corresponding Author
Ika Atsari Dewi

Institutions
Universitas Brawijaya, Balai Besar Pulp dan Kertas (Central of Pulp and Paper) Indonesia

Abstract
Betel plant (Areca catechu L.) is a type of palm that is used for commercial purposes because it has high economic value in every part. Areca nut contains cellulose of 53.2%, so it has the potential to be used as raw material for pulp making for paper craft. In making paper craft to obtain brighter colors, bleaching process is needed to attract attention when viewed. During the bleaching process the factors that must be considered are the levels of chemicals for bleach and the length of time during the bleaching process. The purpose of this study was to determine the addition of H2O2 levels and the length of time for optimal bleaching in the manufacture of paper from areca fibers and used packagingcardboard paperboard to produce quality paper craft in terms of physical paper, namely tensile strength, paper thickness, grammager and brightness. Response surface method (RSM) is a collection of statistical and mathematical techniques that are used to develop, improve and optimize the process, where the response is determined to be influenced by several variables that aim to optimize the predetermined response. This method can be applied to chemical processes. The model used in RSM is CCD (Central Design Composite (CDC) using 2 treatment factors, namely the first factor is the length of bleaching time (X1) and the second factor is H2O2 (X2). The first factor uses an upper limit of 90 minutes (X1 = -1) and a lower limit of 150 minutes (X1 = 1). The second factor uses the upper limit of 5% (X1 = -1) and the lower limit of 15% (X1 = 1). The response to be tested is tensile strength and brightness level. In the combination treatment of bleaching time and H2O2, the best treatment was 150 minutes and 15% H2O2. The optimal response results obtained are 69.50% brightness and 14.71 kN/m2 tensile strength. Other physical test results of art paper are 282 gr/cm2, 0.88 mm thickness and 6.5% moisture content.

Keywords
Areca Nut Fiber, H2O2, Handmade Paper, Response Surface Method

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/deqUZguKWrVm

Corresponding Author
Opilona Badriyah

Institutions
(a) Student Postgraduate of Geography Education – Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
(b) Lecturer in the Department of Geography Education - Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
Digital development is currently measured in information system that support human needs, one of them is in theeducation field. The information system in question is GIS, which is now believed to be the digital model to obtain information such as find locations, know the type of territory without dealing directly and as a tool in education.GIS is a technology for determining which school can be reachable in that area or can be used by schools as a way to get students around the school area (bufferzone). The purpose of this research was to examine the distribution patterns of educational facilities and look at the coverage area of State Junior High Schools in Bandung district. This research was conducted in Bandung district, West Java province. The research method used is a survey with descriptive analysis, namely by looking at the actual distribution conditions contained in the map. The population in this research was Junior High School in Bandung district.The sampling technique was use total sampling. Data processing is assisted by using Geographic Information Systems with overlay and buffering analysis techniques. Furthermore to find out the pattern of distribution of school locations is used location theory with analysis of the nearest neighbors. The result showed that the distribution of state Junior High School in Bandung district was in random pattern category.

Keywords
school spreads, GIS

Topic
Science Education

Link: https://ifory.id/abstract/kYPj2X9eTWFx

Corresponding Author
Usman Effendi

Institutions
Dept of Agro-Industrial Technology,
Brawijaya University

Abstract
PG KA is handled by plant, manufacturing, engineering, QC, and TUK that directly influence the company performance aspect. The decrease of sugar amount production causes the need of performance appraisal. This study aims to identify the factors that influence the company performance, to identify performance appraisal model, and to determine improvement alternative strategies to get the better right. This study utilized the system dynamics approach research method. This system dynamic model illustrates the relation of the factors including financial, production, and employee development. This study results show that the variables that is used as the benchmarks of the company performance level are sugar volume and profit. Based on the identification towards the company capabilities, there is 3 alternative strategies to increase the company performance. The simulation results show that the highest percentage of alternative strategies changes is 15,44% in the increase of the sugarcane production variable (alternative 1) in sugar volume and 12,79% in profit. This value addition can be achieved by PG KA by taking in account the factors that influence land productivity such as water, varieties, soil fertility, pest control, and fertilization.

Keywords
IDPMS, performance measurement, sugar, system dynamics

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/whCyx68XQpAV

Corresponding Author
Andan Linggar Rucitra

Institutions
a) Department of Agro-industrial Technology, Faculty of Agricultural Technology, Universitas Brawijaya, Malang, Indonesia
*andanrucitra[at]ub.ac.id
b) Department of Agro-industrial Technology, Faculty of Agricultural Technology, Universitas Brawijaya, Malang, Indonesia

Abstract
Palm oil is one of the most consumed and produced oils in the world. Oil that is cheap, easily produced and the amount of production is stable is used as raw material for various products such as food, cosmetics, hygiene products, and also as a source of biofuels or biodiesel. PT X produces products in the form of crude palm oil (CPO) and palm kernel (Kernel). A fundamental mistake that often occurs in making decisions is a mistake in making the right sales predictions. Effective planning for both the long and short term depends on forecasting demand for CPO products. The purpose of this study is to know and study demand forecasting using the Time Series method as the first step in designing production and making decisions that will be taken to carry out activities in the next stage. In this study forecasting is done based on historical data obtained from PT X in 2013 until 2017. Forecasting results are used as production planning data from January to December 2018. From the results of the research carried out obtained forecasting data with R2 value of 0.681 which means that the ability of data sales in explaining the results of future data is 68.1% with a p-value of 0.002 and an alpha value of 5% or 0.05 then p-value is less than an alpha value which means the model used has been fit and the forecasting results are valid.

Keywords
Demand Forecasting; crude palm oil; time series

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/76xJk4Kb2GcA

Corresponding Author
Hotnida Nainggolan

Institutions
1Postgraduate School, Brawijaya University, Malang, Indonesia
2Faculty of Mathematics and Natural Sciences, Brawijaya University, Malang, Indonesia
3Faculty of Agricultural Technology, Brawijaya University, Malang, Indonesia

Abstract
Green industry is becoming a hot issue all over the world. The basic principles of it are to minimize resources utilization and emissions. Several developed and developing countries have obligated the implementation of green industry. Indonesian government also strives to implement the green industry principles by adding green industrial standards through the Act No. 3/2014. To support the implementation of that Act, Indonesian government through the Ministry of Industry has published the guideline for implementing green industry. This study aims to map out the driving factors that make up green industrial estate in Pasuruan Industrial Estate Rembang (PIER), East Java, Indonesia. The respondents comprised 15 managers at manufacturing companies, most of them operating in the business of food industry. To develop this study, green industrial assessment guidelines for 2018 by the Ministry of Industry, was used as a reference study. The effectiveness of this assessment will be discussed and lesson learnt will be highlighted. Furthermore, better approaches will be proposed. This paper will provide insights and serve as a good reference for other companies that want to implement the same program in the future.

Keywords
green industry, assessment, better approaches

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/4z2cGvEtnCRT

Corresponding Author
Rihastiwi Setiya Murti

Institutions
a) Center for Leather Rubber and Plastics
* rihastiwi[at]gmail.com

Abstract
The Barramundi fish skin is a by-product of the Barramundi fillet industry which can be used as a raw material for the leather tanning industry. The Barramundi fish skin has a unique and specific grain that can be used as raw material for crafts or shoes. This study aims to determine the optimum formulation of a combination of chromium, mimosa and glutaraldehyde tanning agents on physical and chemical properties, such as flexing resistance, tear strength, color fastness, lastability, seam strength, chromium VI, tensile strength and elongation to meet the requirements of womens shoes . The raw skin were tanned using chromium tanning agent and then neutralized and tanned using a variation of 2-4% chrome , 2% mimosa , and 2% glutaradehyde. The Barramundi fish leather were tested with ISO TR 20879: 2007 : Footwear - Performance requirements for components for footwear - Uppers. The results showed that all of formulations met the requirements of ISO TR 20879: 2007 except the flexing resistance test was mildly damaged. For shoe upper, The Baramundi fish leather can be strengthened by coating the bottom of the leather with other stronger materials. The optimum formulation are combination of chromium-chromium and and chromium-glutaraldehyde.

Keywords
barramundi fish skin, tanning, shoe upper

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/8HtGMW7gzwBE

Corresponding Author
Panji Deoranto

Institutions
Brawijaya University

Abstract
Wheat was raw materials of flour. Flour is made from milled wheat. There are several kind of flour, i.e low, medium and high protein. PT Indofood Sukses Makmur Tbk Bogasari Flour Mills. Kunci Biru and Cakra Kembar Emas are two of products wihich have high demand. The company tend to increase the production to meet the demand without considering environmental aspects. This study aimed to determine the productivity level using green productivity method and to determine strategy alternatives to increase the green productivity. In premilinary research,the kind of waste were defined, i.e. energy, water, material, garbage and emission. The types of waste obtained from the production of flour Kunci Biru and Cakra Kembar Emas were defined using Green Value Stream Mapping (GVSM) methods. Green Productivity Index (GPI) then determine the ratio between economics indicator and environmental impacts. The improvements were recommended based on the results of GPI. Improvement alternative were determines by brainstorming with the manager and section head in the mill E. The questionnaire were filled by two experts, manager and section head in mill E. Pairwise Comparison method than was used to prioritize the improvement alternatives. The results of the research showed that value of GPI on production Kunci Biru flour were relatively good with value 1,10, with economics indicator value were 1,21 and environmental indicator value were 1,10. The value of GPI on production of Cakra Kembar Emas relatively low with value 0,99, with economics indicator value were 1,35 and environmental indicator value were 1,36. The priority alternative to increase the value of green productivity was optimization of the production process with weight value 0.594.

Keywords
GPI, GVSM, Pairwise Comparison, Wheat Flour

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/wyHKJYXNkxeE

Corresponding Author
Panji Deoranto

Institutions
Brawijaya University

Abstract
The development of the ice cream business in Indonesia is currently very fast with competition that is also getting tighter. Various brands of ice cream from different companies can easily be found in the market and more and more choices of ice cream for consumer consumption. In Malang City recently, new ice cream products have emerged. One of them is Aice ice cream products. The emergence of Aice ice cream has resulted in increased competition between ice cream one products and other ice cream products, so that businesses seek ways that can be used as an advantage in competition. One of the ways that can be done by companies to be able to compete is knowing the factors that influence consumer purchasing decisions on a product. The purpose of this study was to determine the effect of price, brand image and product quality on buying interest and purchasing decisions on Aice ice cream, and the influence of buying interest mediated the price, brand image, product quality variables on purchasing decisions. This study uses price variables (X1), brand image (X2), product quality (X3) on buying interest (Y1) and purchasing decisions (Y2), with a total sample of 100 respondents who had bought and consumed Aice ice cream products in six last month in Malang City. Data collection is done by distributing and interviewing consumers. Data processing using the PLS (Partial Least Square) method. The results of this study indicate that the price variable (X1), brand image (X2) and product quality (X3) significantly influence buying interest (Y1) and purchasing decisions (Y2). Interest buying variable (Y1) is able to mediate the relationship between price variable (X1), brand image (X2) and product quality (X3) on purchasing decisions (Y2). The variables that have the most dominant influence on purchasing decisions are product quality variables (X3).

Keywords
aice ice cream, purchase decision, PLS

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/6TaubhpjKvnm

Corresponding Author
Ibrahem Omar Matoug

Institutions
Department of Environment Science. Azzaytuna University. Libya.

Abstract
The air emitted from different sources contains high levels of pollutants, which affect our health. Air pollution control needs to protect the public exposed to safe levels of different particulates size, ammonia, hydrogen sulfide, and volatile organic compounds. In addition, evaluation of the total quantity of pollutants emitted by every factory farm emissions. This paper establish a new design to recycle air pollution with no more emissions outdoor. Indoor emissions removing hazard materials from the source and recycle all waste materials. Control equipment indoor remove the emission, convert to less harmful contaminant or recycle a valuable material for further use.

Keywords
pollution, air, indoor

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/2KZUuWMPAaN4

Corresponding Author
Danang Triagus Setiyawan

Institutions
Brawijaya University

Abstract
PT. XYZ is a company that produce agar powder. This research aims to minimize waste that happens in the production process of agar powder by using Lean Manufacturing concept with Value Stream Mapping (VSM), Value Stream Analysist Tools VALSAT, and Simulation Model. The results of this research indicate there are waste such as human potential, inappropriate design, unnecessary, and with the highest waste is in form of waiting time. It caused by unconsistent of raw material, unnresponsiveness worker, lack of tools that help operator, bottleneck process and unscheduled process. Recommendation for improvement are embracing capacity in filtering workstation, applicating bin system, equip workstation with timer, and making production schedule. Based on the simulation that have been done shows reduced total lead time of 2,94446 days to 2,270 days or efficiecy procces increased 22,81%.

Keywords
Lean Manufacturing, Value Stream Mapping, Simulation

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/WQM8mrq3gp9H

Corresponding Author
Shreef Mahmood

Institutions
Department of Horticulture, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

Abstract
The experiment was conducted to study the shelf life and physicochemical changes of strawberry under different postharvest conditions. Single factor storage experiment was laid out in a completely randomized design. In the experiment, fruits of BARI Strawberry-1 were stored in eight storage conditions: T1= open condition + ambient temperature, T2= open + 1°C temperature, T3= LDPE bag + ambient temperature, T4= LDPE bag + 1°C temperature, T5= cardboard + ambient temperature, T6= cardboard + 1°C temperature, T7= punnet + ambient temperature, T8= punnet + 1°C temperature. The stored fruit was monitored over a period of 2, 4, 6 and 8 days of storage. Parameters were studied in the experiment includes: firmness, calyx and pericarp color, postharvest decay, weight loss, TSS, titratable acidity, ascorbic acid total phenolics, and changes in anthocyanins. In all cases, fruits stored at ambient temperature lost weight rapidly and within 4 DAS discoloration found in pericarp and calyx color. In contrary, fruits kept in 1°C at cardboard retained pericarp and calyx color greatly up to 8 DAS. Decay symptom occurred in the fruits stored at ambient temperature irrespective of all packaging materials. On the other hand, no decay observed at the fruits stored at 1°C. Changes in firmness, TSS, titratable acidity, ascorbic acid, total phenolics and anthocyanin in the fruits were minimal in the treatment of cardboard at 1°C than those kept in other postharvest treatments. Overall, fruits kept in 1°C showed better storage behavior and quality than ambient temperature.

Keywords
Postharvest, shelf life, quality, strawberry

Topic
AGRICULTURAL PRODUCT TECHNOLOGY

Link: https://ifory.id/abstract/cMThEBeaVPw4

Corresponding Author
Danang Triagus Setiyawan

Institutions
Brawijaya University

Abstract
The problems faced at at XX sugarcane industry is low reliability. The purpose of this study is to identify the critical subsystems that causes low reliability and to determine the optimal interval of scheduled planned maintenance. By using the machine failure data can be obtained the reliability estimation for each subsystem for different time intervals. As a results of the analysis show that the Stalk Hammer and Hammer Tip is the most critical subsystem. The result shows reduced the frequency of failure from 326 times to 162 times, and increasing availability from 86.5% to 90.5%.

Keywords
Maintenance Management, Reliability, Total Cost Maintenance

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/bfDYuJvXcG4n

Corresponding Author
Sumaya Yulia Putri

Institutions
(a) Department of Physics, IPB University, Bogor, 16680, Indonesia
*yessie.sari[at]apps.ipb.ac.id

(b) Department of Statistic, IPB University, Bogor, 16680, Indonesia

Abstract
Oil palm is one of Indonesias export commodities which is quite important as a foreign exchange earner beside oil and gas. The palm oil industry will produce the main product in the form of palm oil. Palm oil production will cause a lot of palm oil waste to be produced. Palm oil waste consists of solid waste and liquid waste. Palm oil mill effluent (POME) can be processed into biogas in anaerobic production. Other organic materials can be added in the production of biogas such as cow manure. Microorganisms in cow manure which is mixed with POME are expected to convert organic matter into methane optimally. Adding calcium nanoparticles can shorten biogas production time and accelerate fermentation time. The purpose of this research is to determine the characteristics of biogas and the effect of adding calcium on increasing biogas production. Comparison of POME with cow manure which was varied then the calcium nanoparticles are added with variations in milling time and concentration. Calcium nanoparticles treated with milling were analyzed by SEM to see the different sizes of each time variations and to determine the morphological structure, then XRD analyzing used to determine phase, lattice parameters and crystallite size, they were also tested by PSA to analyze the size particle and its distribution. During the anaerobic fermentation process of biogas, temperature and pH measurements were carried out on a mixture of POME and cow manure. The produced biogas was analyzed by gas chromatography to identify the methane gas present in biogas from a mixture of POME and cow manure. The result shows that the addition of calcium nanoparticles viewed increasing of biogas production.

Keywords
Cow manure, fermentation, methane, SEM, XRD, PSA

Topic
RENEWABLE ENERGY AND BIOREFINERY

Link: https://ifory.id/abstract/qLrCHQ6Gmp7d

Corresponding Author
M Arif Kamal

Institutions
(a) Department of Agroindustrial Technology
Faculty of Agroindustrial Technology
Universitas Brawijaya

(b) Department of Social and Economics
Faculty of Agriculture
Universitas Brawijaya

(c) Student of Bachelor Science of Agroindustrial Techology, Department of Agroindustrial Technology
Faculty of Agroindustrial Technology
Universitas Brawijaya

Abstract
Tea is one of the subtropical plants widely consumed because it has a distinctive taste and aroma. In order to maintain product quality it is needed to implement standard production procedures that aims to produce products that meet product quality and safety requirements using Good Manufacturing Practice (GMP) criteria. This study is aims to observe and assess the GMP Implementation Tea Beverage production from several GMP criteria including the location, buildings, sanitation facilities, machinery and equipment, materials, process supervision, final products, laboratories, employees, packaging, labeling and product description, transportation, sanitation storage, maintenance and programs, documentation and recording and training.

Keywords
Keywords: Tea, Good Manufacturing Practice (GMP),

Topic
AGROINDUSTRIAL PRODUCTION SYSTEM MANAGEMENT AND REGULATION

Link: https://ifory.id/abstract/VumKT6RnWDNp

Corresponding Author
afifah latip rayid jauhari

Institutions
UPI

Abstract
Important representation in learning mathematics that is important for students. The purpose of this study is to classify the ability of mathematical representation as the basis for determining approval in future studies. The representation of capabilities studied in this study is verbal representation, representation of images and symbols of representation in introductory social studies subjects. This study involved 3 students in the third semester communication class. The instrument used consisted of a test of mathematical representation ability in introductory subjects in social statistics. Data analysis was carried out by analyzing the results of student answers and then connecting to high and low groups, then analyzed in full on the profile of students mathematical representation abilities. The results of data analysis show that most students are included in the criteria for the ability of moderate mathematical representation. The results of this study have implications for the need to develop appropriate learning models so that participation increases

Keywords
Higher Education; Representation; Statistics

Topic
Mathematics Education

Link: https://ifory.id/abstract/2jTZbCu8GhtE

Corresponding Author
Luluk Sulistiyo Budi

Institutions
1,2,4Agriculture Faculty, Merdeka Madiun University, Madiun, Indonesia
3Economy Faculty, Merdeka Madiun University, Madiun, Indonesia

Abstract
Increasing agricultural products to be competitive by increasing value added is very important. The study aimed to find out the best treatment from a combination of the effect of heating temperature and sesame varieties on the production and quality of sesame oil. This study used factorial completely randomized design method where the first factor was sesame variety (Sbr1, Sbr2, Sbr3, Sbr4, and Winnas1) and the second factor was heating temperature with levels 90°C, 100°C, and 110°C. The variables observed were the weight of pulp, total oil production, oil color, and fatty acid content. The results showed that the Sbr4 variety with a temperature of 110°C had the highest oil production even though it was not significantly different from Winnas1, as well as its aroma and fatty acid content.

Keywords
Sesame seed, sesame oil, fatty acids, oil quality

Topic
AGRICULTURAL PRODUCT TECHNOLOGY

Link: https://ifory.id/abstract/hNwqJdRLWjmH

Corresponding Author
Risma Amelia

Institutions
IKIP Siliwangi

Abstract
Mathematical learning requires deductive and abstract thinking. Geometry material is material that requires a high-level thinking process of students. Therefore, it takes the process of abstraction of students in understanding mathematics, especially geometry material. Straight-line equation material is a prerequisite in understanding geometry material further. This study intends to measure the process of thinking students in the matter of straight line equations. The population in this study were junior high school students in the city of Cimahi, and the samples in this study were class VIII students of one of the junior high schools in Cimahi City. This research is a descriptive qualitative study. The instrument in this study is a test that is analyzed to see and measure the students abstraction process which appears in the material of straight line equations.

Keywords
Abstraction Process, Straight Line Equation

Topic
Mathematics Education

Link: https://ifory.id/abstract/2pL68xbyfeCn

Corresponding Author
Aulia Firda Alfiana

Institutions
(1)Master Program of Environmental Science, School of Postgraduate Studies, Diponegoro University, Semarang
(2)Departement Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang

Abstract
Soy sauce production process is one of well-known small-medium enterprises (SMEs) in Grobogan Regency. The production of soy sauce requires water in the process of washing black soybeans, boiling black soybeans, moromi fermentation, washing of process equipment, bottle washing, cleaning the production site and turning off the coals. The study case research aimed to determine the potential of reusable water in soy sauce process production. The subject of this research was on of the soy sauce process production in Grobogan Regency of Central Java. The data collection was done by using documentation, observation and interview method. The result show that the water could be reused by using black soybean washing water can be used in the bottle washing tub 1, water in washing tub 2 can be used for washing process equipment and used water of washing process equipment can be used to put out the coals on the furnace. Soy sauce process production can save water as much as 16,5 m3 per month. In conclusion, the soy sauce production process had a big potential of reusable water that could reduce the water consumption and production coast.

Keywords
wastewater, water consumption, soy sauce

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/gQ4jMXt78nkp

Corresponding Author
Anik Yuliani

Institutions
IKIP Siliwangi

Abstract
The purpose of this study is to analyze students creative problem solving (CPSM) abilities based on the cognitive stage. The number of students involved in this study was 32 eighth grade students, a set of TOLT to determine the cognitive stage of students and a description test (CPSM). The results of this study found that: a. as many as 70% of students are still at the concrete stage, 25% of students are in the transition stage, and 5% have reached the formal stage; b. Overall students achieve CPSM quality at a moderate level; but there are differences in CPSM quality between students in the formal, transition and concrete stages; The CPSM quality of the students is in the formal stage, the transition phase, and the concrete stages are successively at a fairly good level, medium, and lacking; c. Concrete stage students experience more difficulties in completing CPSM tasks, while students in the transitional and formal stages only experience little difficulty in completing CPSM tasks.

Keywords
cognitive development stage, TOLT, mathematical creative problem solving

Topic
Mathematics Education

Link: https://ifory.id/abstract/atGgHkwQByeW

Corresponding Author
Ahmad Zaki Mubarok

Institutions
Department of Agricultural Product Technology, Brawijaya University, Malang, Indonesia

Abstract
The rheological properties of fluid and semisolid foodstuffs is important in the design of flow processes in the quality control, storage stability, and in understanding and designing texture of the product. The viscosity of tomato ketchup is one of the major quality components for consumer acceptance. The tomato ketchup is a semisolid material, which obtain its viscosity from naturally occurring pectic substances in fruits. Enzymatic degradation, pectic/protein interaction, pulp content, and homogenization process may affect the consistency of tomato product. These inconsistencies may be diminished by the addition of hydrocolloids. In this study, the flow properties of tomato ketchup were evaluated upon addition of different concentrations of porang flour (0.25%, 0.50% and 0.75%) and in various temperatures (25, 35, 45 and 55 oC). The flow behaviour was characterized by fitting the experimental data of each formulations to the Power-law and Herschel-Bulkley model. The Arrhenius equation was used to describe the effects of temperature on the apparent viscosity of the tomato ketchup formulations. The temperature dependency was assessed to evaluate the stabilizing effect of different concentrations of porang flour on tomato ketchup.

Keywords
rheology, apparent viscosity, texture, ketchup, porang flour

Topic
AGRICULTURAL PRODUCT TECHNOLOGY

Link: https://ifory.id/abstract/yxP8b6QEjpBq