bluuebunny/crossref_metadata_2025 huggingface dataset:
Risk mitigation on product distribution and delay delivery : A case study in an Indonesian manufacturing company
Authors: Kusrini E , Sugito E , Rahman Z M , Setiawan T N , Hasibuan R P
Published: January 2020

In a dynamic supply chain environment, problems that arise due to delays in the delivery of raw materials and distribution of products to consumers can pose risks and threats to the company. This study aims to identify and mitigate the risk of late delivery of goods. Risk management starts with identifying sources of risk, defining risks, creating risk maps and mitigating risks. a case study conducted at a manufacturing packaging company in Batam, Indonesia. The results showed that the biggest risks were supplier production capacity, supplier product quality, forecasting from consumers, daily finished good delivery schedule to consumers and loading and unloading processes at consumers. This research proposes mitigation to minimize the impact of short-term and long-term risks.
Spare part requirement and inventory policy for Rovema’s 1 machine using Reliability Centered Spare (RCS) and Min-Max stock methods
Authors: Angelina C F , Atmaji F T D , Santosa B
Published: January 2020

XYZ company is a manufacturing company engaged in the field of medicines, food, and natural products. One of the problems found in the machine delay, called “outstanding”. An outstanding occurs is mostly caused by the unavailability of the spare parts. Based on the downtime losses data, the highest downtime, as well as unavailability spare parts, was owned by Rovema’s machine, one of the packaging machines in food plant division. Therefore in this research, the Reliability Centered Spare (RCS) method was applied to calculate the optimal critical spare part policy using the Poisson process and Min-Max stock analysis. The analysis result shows that the critical component of Rovema’s machine is steel band and brass insert are must be stored in a technical warehouse for one year ahead with optimal inventory quantity is 18 and 15 pieces with minimum stock is 10 pieces each
Observing knowledge of ergonomic product in Indonesia
Authors: Pratama G B , Nurfitrisari N , Widyanti A
Published: January 2020

A range of ergonomic products have started to be widely produced and used in Indonesia. Office supplies as well as computer peripherals appear to be the majority of product types which are ergonomic labeled by the manufacturer. However, how well is people’s knowledge regarding the characteristics of ergonomic product and its benefit are still unidentified. Not to mention the intention to use ergonomic-labeled product after realizing the benefit. This research is aiming to observe people’s level of awareness and intention to use the ergonomic-labeled products through a set of experiments. The investigation used several types of office chair, keyboard, and mouse representing the ergonomic product and standard product. Participants’ productivity by using ergonomic and standard product were compared and analyzed. The intention to use ergonomic products before and after trial were also observed.
Usability Analysis of an Academic Faculty Website: A Case Study of the Selected University
Authors: Soewardi H , Ramadhan M H
Published: January 2020

Website constitutes a pivotal element in an academic institution. It is useful to provide academic information for stakeholder requirements like final scores, academic calendar, scholarship, student competition, etc. This paper presents an investigation about the level of usability of the website at the selected faculty of the university in Indonesia based on 5 dimensions, namely learnability, efficiency, memorability, error, and satisfaction. It is noteworthy that the faculty should supply the information in detail and accurately. However, as a matter of fact, few of a faculty website in some certain universities sometimes experiencing matters for the user. Thus, it is crucial to do the analysis of the usability of the website at the faculty level. A qualitative study was conducted by distributing some Likert-scale questionnaire to stakeholders that consisted of students, academic staff, student’s parents, and lecturers. The questionnaire contains 25 statements divided into five groups of elements by referring five dimensions above with each group having 5 questions or statements. The non-parametric statistic was conducted to test the hypothesis. The result of this study shows that the website of the selected faculty is classified into a moderate level with 68% of usability grade. Thus, this study recommends that the faculty improve its website in the layout of menu, content, add some features to ease login and increase usability level.
Recycled Polypropylene Filament for 3D Printer: Extrusion Process Parameter Optimization
Authors: Herianto  , Atsani S I , Mastrisiswadi H
Published: January 2020

The presence of recycled plastic materials for the 3D printing process expects that the production process will be more environmentally friendly and solve the problem of plastic waste globally. However, recycled plastic as a filament material in the 3D printing process is still limited. One of the ways to make recycled plastic filaments is by extrusion. This research aims to optimize the extrusion process parameters in the manufacture of recycled plastic filaments (Polypropylene) that have never been conducted before. The extrusion process was analysed using the Taguchi and ANOVA methods. The results of this study indicate that the spooler speed of 4 rpm, extrusion speed of 40 rpm, and extrusion temperature of 200°C in the parameter setting produce an average filament diameter of 1.6 mm. However, filaments made from Recycled Plastic (Polypropylene) have a rough and easily curved surface, so further research is needed.
Characteristics of Brake Lining Cessna Caravan Type 208B
Authors: Suroso I
Published: January 2020

The brake system is a braking system located on the landing gear on an airplane. Brakes are one of the most important components of safety, and performance in the airplane. This study uses the observation method, the interview method with the engineer and the experimental method at The Material Laboratory, Polytechnic Ceper, Klaten. The purpose of this study is to determine the function, characteristics, and effect of chemical compositions on the characteristics of the brake lining on the Cessna Caravan Type 208B aircraft. The results of the brake lining as, and characteristic of brake lining are reducing speed and stopping the aircraft wheels. The characteristics of the brake lining as follows result in a hardness value of 205 VHN and the chemical composition consist of Fe 95,9%; Cu 0.8%; Carbon 0,33%; 0,235% Si; Mn 0,468%; Al 0,235%; Mo 0.151%; and Cr 0,772%. This brake lining materials are included in medium carbon steel with chromium alloy. The brake lining material is steel medium carbon which has hard, resistance wear, durable use life. The influence of chemical composition on characteristics of brake lining on this aircraft is the higher the composition carbon the resistance to wear.
Adoption of 3D Printing in Indonesia and Prediction of Its Application in 2025
Authors: Ismianti  , Herianto
Published: January 2020

Additive manufacturing, known as 3D printing (3DP) is currently growing rapidly in many countries. The applications of 3DP may vary in each country, depending on the country’s 3DP development and local needs. This study aims to find out the adoption of 3DP in Indonesia and the prediction of its application in the future. Data were collected either by interviews or questionnaires. Data retrieval was done 3 times. First, data were collected from society with 109 respondents. The second data comes from 3DP user with 40 respondents, and the third data comes from the expert with 15 respondents. This study used a pairwise comparison method to predict the application of 3DP in the future. The results of this study indicate that 67% of respondents in society have known about 3DP. The number of 3DP users was increasing every year, a considerable increase in the last 3 years. From the pairwise comparison results, it was found that in the health sector, the highest prediction is in the fabrication of medical equipment. In the industrial sector, the highest prediction is fabrication for electronic and robotic. Then in the sociocultural sector, the highest prediction is education.
Design of SCADA for Protection System of Uncoiled DC Motor’s Temperature using PLC ABB AC 800PEC Based on Wonderware Intouch
Authors: Putra J T , Diantoro A , Oktiawati U Yusmaniar , Surriani A , Pradana A B , Subekti L
Published: January 2020

Continuous Tandem Cold Mill (CTCM) operates many types of DC motor for various processes. The continuity of the DC motor is very important to ensure the automation process are working perfectly and safe. One of the abnormal condition when operating DC motor is overheating at Field winding and Field bearing. Therefore, this research is needed to avoid further damage in the DC motor by designing and implementing protection system of temperature based on PLC (Programmable Logic Controller) ABB AC 800PEC and PT100 sensor. SCADA (Supervisory Control and Data Acquisition) system was implemented so the operator can supervise the motors. When temperature is increasing and higher than the allowed maximum temperature, the system should generate Fast Stop signal to stop every process that have been running at entry section CTCM. The protection system was implemented successfully and generated Fast Stop signal when the Field winding temperature was higher than 100-degree Celsius or when the Field bearing temperature was higher than 75-degree Celsius.
Corn husk Fibers Reinforced Polyester Composites: Tensile Strength Properties, Water Absorption Behavior, and Morphology
Authors: Sari N H , Suteja S
Published: January 2020

The effects of fiber content and immersion time in the water on the tensile, morphology and water absorption properties of composites made from corn husk fiber/polyester have been studied. Composite made with a variety of different fiber contents namely: 20%, 25%, 30%, 40%, 50% and 60% respectively. All composite specimens were immersed in water for 24 h and 72 h. The effects of fiber content and time of immersion of composites in water have been determined by examining the nature of tensile strength, water absorption behavior, morphology. The results demonstrated that after soaked in water for 24 h and 72 h, the water absorption properties of the composites increased with increasing fiber content. The tensile strength and modulus of elasticity of composites tend to increase from 20% to 30% fiber content after immersed for 24 h, and then decrease with increasing fiber and soaking time because the interface between fiber and polyester becomes weak. These results suggest that corn husk fiber composites could have the potential to use as decking, siding, and exterior windows.
Online Consumer Segmentation Study Based on Factors Affecting E-Commerce Selection
Authors: Puspitasari N B , Pramono S N Widyo , Rinawati D I , Fidiyanti F
Published: January 2020

Indonesia has considerable e-commerce growth potential supported by the increasing number of internet users. The rapid growth of e-commerce is characterized by the increasing number of e-commerce resulting in the increasingly intense competition among e-commerce. The purpose of this study is to do online buyer segmentation based on the attributes of the website. The survey using an online questionnaire was given to 338 online buyers in Indonesia. Factor analysis is used to verify the construct model used using Confirmatory Factor Analysis (CFA). Finally, segmentation analysis is applied to identify groups of respondents and create their profiles. Based on segmentation analysis, the study identified five segments, namely, assurance seekers, secure seekers, convenience seekers, convenience and secure seekers, and social connectivity seekers. Each of the five segments varies greatly in the selection of websites for purchases and describes the differences in their online shopping orientation. Companies need to develop a plan to consider the unique characteristics of the online market segment to attract and retain users. The findings of this study can be used as guidelines for the development of a multi-dimensional strategic framework by online retail companies.
Applying eye tracker technology for analyzing user interface design of online transportation applications (case study: grab application)
Authors: Dewi D S , Ilmi N , Dewi R S
Published: January 2020

In the past few years, online transportation has gain popularity in Indonesia. Many passengers prefer to choose online transportation for traveling due to several reasons including accessibility and price. In response to this, several online transportations have been operating in Indonesia, the most popular one is Grab. Despite its popularity, little is known about the usability of its interface design in respect to specific groups of user especially for elderly. In order to provide information on how to better design online transportation application especially for elderly, this paper aims to analyze interface design of Grab application from the elderly point of view. For this purpose, an experiment was conducted by using the eye tracker. This technology has applied for different purposes including design and marketing research purposes. The experiment was conducted by involving 10 elderly participants with ages ranging from 55-69 years. The eye tracker data used in this study is a fixation number, fixation duration, saccade number, and saccade duration. The result of study reveals that gender influence the fixation number, fixation duration, saccade number and saccade duration. Eye condition also influences fixation number and fixation duration but not for saccade number and saccade duration. The highest fixation number occurred in the area of interest (AOI) 2 and the largest fixation duration is also in the area of interest (AOI) 2.
RTS Threshold Variation Study on Contention-based IEEE 802.11n EDCA for Real-time Services
Authors: Herdiniamy I A , Cahyadi E F , Nugraha E S , Yuliantoro P , Hwang M S
Published: January 2020

As a “wide-deployed” wireless local area networks (WLANs) standard, the IEEE 802.11n was designed to support a high data transmission rate (up to 600 Mbps) and maintain a compatibility with the previous versions. Due to a substantial demand of real-time data services, such as VoIP and video conference, an enhanced quality of service (QoS) mechanism become crucially important. The IEEE 802.11n standard inherits the enhanced distributed channel access (EDCA) mechanism from the IEEE 802.11e, as the MAC layer improvement. It classifies the traffic into four different classes of data, called access categories (ACs). However, EDCA still suffers from a data packet collision, caused by hidden nodes problems. The packet loss ratio and end-to-end delay increase along with the escalation of real-time traffic. To address the issue, we conduct a simulation in Riverbed Modeler 17.5 environment with a 128, 256, 512, and 1,024 Bytes of request to send (RTS) threshold variation value to overcome a collision caused by hidden nodes problem. The result shows that the 512 Bytes of RTS threshold value gives the best QoS output among them all.
The Influence of Blue Light in Maintaining Alertness in Tropical Country: A Preliminary Study
Authors: Rahma K T , Salma S A , Widyanti A , Suprijanto
Published: January 2020

Several studies have discussed the influence of blue light on cognitive activity. This study aims to determine the effectiveness of blue light in increasing alertness at night in tropical countries. Twelve healthy young males joined in this study. All participants were asked to do a monotonous activity that is reading activity. The experiment was a within-subject design with the independent variable is lighting condition (normal light and blue light) and duration of exposure (30 minutes and 60 minutes). Electroencephalography (EEG) signals were recorded continuously during the experiment. Alertness was measured based on theta, alpha, and beta activity. The result is the light condition not significantly affected the theta (F (1,11) = 0.608, ρ = 0.452), alpha (F (1,11) = 1.561, ρ = 0.237), and beta (F (1,11) = 0.608, ρ = 0.700) activity. This shows that blue light is not effective in increasing alertness at night in the tropical country both in short and long duration of exposure.
Identify the Relevant Pages of Book to be Indexed Using Naive Bayes Classification Method
Authors: Christina S , Ronaldo D
Published: January 2020

The back-of-book index is a component that is often found in non-fiction books. The back-of-book index contains important terms and page numbers where the terms appear in the book, it is useful for helping readers find certain term directly, without having to search on every page. Usually, the back-of-book index is compiled by the author or a professional indexer, although currently there are several automatic indexing applications available. To determine a term on a page worth to be indexed requires knowledge and expertise of the author whom better understand the book’s context. Hence, generating a good back-of-book index is a task that requires great effort, knowledge and cost. Therefore, the back-of-book index is very possible containing indexed terms that refer to irrelevant page numbers due to human error or the weakness of the indexing application. This study aims to identify the relevance of the pages to be indexed in the back-of-book index, using Naive Bayes Classification. The testing result shows that the approach with Naive Bayes Classification produces an average precision value of 74.02 percent and 100 percent for the recall value. The average precision value that more than 50 percent indicates that the naive bayes classification approach is capable to identify the relevant and irrelevant pages.
Lean Concept Development in Fast Food Industry Using Integration of Six Sigma and TRIZ Method
Authors: Indrawati S , ‘Azzam A , Adrianto E , Miranda S , Prabaswari A D
Published: January 2020

The service industry plays an important role to the development of Indonesian economy. Recently, the fast food industry has a good growth due to customers preferences. This significant contribution and industrial growth are not accompanied by the quality of industrial performance. This condition lead to a weak competitiveness, especially to face of the ASEAN Economic Community (AEC). The fast food industry needs to develop a specific strategy to improve the service system. This study uses a lean approach to improve the service system in a fast food restaurant. The method used is the integration between six sigma and TRIZ (Theory of Inventive Problem Solving) to get a creative problem-solving innovation in improving service industry performance. Based on the research conducted, it can be identified that the waste occurs in fast food industry is the service delay due to the process of giving flavor with a total time of 527 seconds. Improvement strategy to reduce the waste is to change the process of giving flavor (parameter changes) and implementation of 5S in the work area (enriched atmosphere). There is a time improvement of 90% by implementing the strategies that have been obtained.
Production Capacity Optimization with Rough Cut Capacity Planning (RCCP)
Authors: Sugarindra M , Nurdiansyah R
Published: January 2020

One of the factors supporting the company’s success in achieving its goals is the ability to meet demand and provide satisfaction to customers. A musical instrument industry makes products with a make to order system, so that it requires the accuracy and smoothness of the production process to meet the demand in accordance with the specified time. Based on data on average total daily production of Spray and Sanding Balikan Factory 2, it known that there is still often an imbalance between the actual productions of the planned production at regular work time. This study aims to analyse and evaluate the capacity of production resources and facilities. The Rough Cut Capacity Planning (RCPP) method is a method that can show a comparison between the actual capacity available and the capacity needed. Based on the research results, workload rearrangement must be carried out to distribute labor and increase work hours 90 minutes and 120 minutes so that demand can be fulfilled.
Escalation proposal of supply chain management performance of oil and gas upstream industry in PT. XYZ by using SCOR model approach
Authors: Immawan T , Nugraha I
Published: January 2020

Oil and gas industry in Indonesia is one of the industries with the largest contribution for country’s foreign exchange. As recorded in 2014, 12% of country’s budget is from oil and gas industry and able to provide a significant increase in national economic growth. But in the other hand, supply chain performance in this industry shows inconsistencies in each year, especially in PT. XYZ. As one of the largest oil and gas companies in East Kalimantan, Indonesia. As the result, company’s targets are missed oftentimes and have not been able to achieve competitive advantage. Therefore, the purpose of this study is to propose performance improvements in the supply chain of PT. XYZ. This study uses the model of Supply Chain Operations Reference (SCOR) 11.0 which focuses on the attributes of reliability, Analytical Hierarchy Process (AHP), and fishbone in collecting and processing research data. The result shows that the supply chain performance of PT. XYZ. which focused on the reliability attribute is categorized as good, starting from 2012 to 2017. There is 1 indicator that need to be improved and get further control, that is the indicator of percentage of supplier meeting environmental metrics/criteria and fill rate. One means to overcome the problem is by using big data analysis approach, because the approach can analyze big number of data in the Company, whether it’s structured, semi-structured, or unstructured.
The important level of washing machine quality dimensions in 4.0 industrial era based on the perception of a laundry business: A preliminary investigation
Authors: Rakhmawati T , Sumaedi S , Astrini N J , Bakti I G M Y , Yarmen M , Damayanti S
Published: January 2020

The development of technology has created various type of innovative washing machine on the market. Numerous options influenced consumers’ quality expectations. Consumers’ expects more from the ever-growing number of washing machines. This research aims to identify washing machines’ quality dimensions in 4.0 industrial era and their level of importance based on the perception of a laundry business. This study used one subject, a medium-sized drop-off laundry business “X” in Bogor, Indonesia. The identification of indicators and quality dimensions was done through ad scouring process, discussion with the research team, and interviews with Laundry X. The importance level of washing machine quality dimensions was assessed using the Kano model. The results show that washing machines in the 4.0 industrial era have several superiorities in terms of customization, easiness, smartness, safety, performance, aesthetics, durability, information and service support, and environmental orientation and energy efficiency. For Laundry X, easiness, safety, performance, durability, and information & service support are the most important dimensions.
Integration of pyrolysis – tar decomposition over porous low grade iron ore
Authors: Wicakso D R , Nurandini D , Mirwan A , Putra M D
Published: January 2020

The objective of this research was to investigate the effect of low grade iron ore as catalyst on pyrolysis process of using palm empty fruit bunch. The process was conducted in fixed bed reactor at 450-600 °C. During experiment, the biomass placed within the first stack underwent pyrolysis process was pyrolyzed to produce char, tar and gases. Tar vapor and gases passed through the catalyst bed located within the second stack to conduct catalytic reaction. Furthermore, the vapor left the reactor and entered the cooling system. The catalyst after experiment was weighed to calculate total carbon deposited into catalyst pores. The results showed that the presence of low grade iron ore catalyst increased the gas yield with the yield reduction of liquid fraction. The gas yield was also increased with increasing temperature.
Rheological and kinetic studies of low density polyetyhlene (LDPE) – chitosan biocomposite film
Authors: Kusumastuti Y , Timotius D , Putri N R E , Syabani M W , Rochmadi
Published: January 2020

The amount of plastic waste has always increased over the years and caused many problems in the environment because of its poor degradation rate characteristics. Recently, the interest in biodegradable polymer to substitute these synthetic plastic materials has been increased. Biocomposite materials have better biodegradability rate and can be utilized for several applications, such as packaging, agriculture, biomedical and healthcare. Chitosan as natural polymer that has good biodegradability can be combined with low density polyethylene (LDPE) to improve its mechanical properties. The LDPE-chitosan biocomposites were made by mixing chitosan and LDPE with maleic anhydride as compatibilizer and perbutyl Z as an initiator. In this study, the decomposition kinetic and thermal behavior of low density polyethylene (LDPE)-chitosan biocomposites were investigated by thermogravimetric analysis (TGA). The residual weight of biocomposites after decomposition process was analyzed. The samples were heated in the range of temperature from 25 °C to 500 °C and at different heating rates of 5, 10, 15, 20 °C/min, respectively. The result shows that activation energy decreased along with the increasing of chitosan concentration. This result indicates that the LDPE-chitosan biocomposite is a promising candidate for substitution of synthetic plastic.
Analysis of E-Service Quality Influence Through E-Satisfaction on Online Purchasing Decisions (Consumer Survey of PT. X)
Authors: Sutrisno W , Setyawan A D
Published: January 2020

This study aims to determine the effect of E-Service Quality through E-Satisfaction on online purchasing decisions at PT X. Data collection using a questionnaire with a Likert scale. This research uses Partial Least Square as an analysis tool. The results showed that the E-Service Quality variable influenced the E-Satisfaction variable by 37.9%, and influenced the online purchasing decision variable by 0.514. Means it can be concluded that the E-Service Quality variable has a positive and significant effect on online purchasing decisions through E-Satisfaction on PT. X
DNS tunneling Detection Using Elasticsearch
Authors: Sani A F , Setiawan M A
Published: January 2020

Domain Name System (DNS) Protocol is a popular medium used by malware to perform ‘command and control’ in taking over victim’s computer, this technique called as DNS tunneling. Moreover, DNS tunneling can also be used to bypass captive portal hotspot in public places and worsen the network quality. However, in more dangerous stage, DNS tunneling can also be used to exfiltrate data from the victim’s computer. Instead of using DNS Protocol to translate domain name, the medium misused to bootleg the data. Those are the weaknesses which frequently used by the attacker to deceive network administrator. Our approach to this problem is analyzing the traffic using unique hostname as indicator of compromise and utilizing Elasticsearch tool to detect DNS tunneling. Elasticsearch will send an email to notify the administrator about DNS tunneling. The email contains information about domain suspected as perpetrator of DNS tunneling. The result from Elasticsearch can be used to add the domain blacklist, so the domain can no longer be used to perform DNS tunneling. Hopefully those combinations are able to support the network administrator to secure the network from DNS tunneling. Moreover, the result of network quality analysis shows that there is a rise in jitter value and packet lost when DNS tunneling happens.
Implementation of Market Basket Analysis based on Overall Variability of Association Rule (OCVR) on Product Marketing Strategy
Authors: Alfiqra  , Khasanah A U
Published: January 2020

Marketing strategy is an important thing that must be developed by retail. A method that can be used to develop a marketing strategy based on customer buying pattern is Association Rule (AR). AR is the process of finding association relationships between products that occur in one transaction. The application of AR to analyze custumer buying patterns is referred to as Market Basket Analysis (MBA). Rule obtained from ARMBA is sometimes not enough to provide an analysis when the variability of costumer buying pattern is high. Overall Variability of Association Rule (OCVR) is an indicator that focuses on analyzing market basket which assumes high variability in custumer behavior in buying products. This study used custumer transaction data of a retail in Yogyakarta. The data consisted of 57784 transactions in a month involving 41248 items. This study produced rules for each period (weeks), then the rules were used for further analysis using OCVR. 59 rules produced on the 1st period, 48 rules on the 2nd period, 54 rules on the 3rd period, and 58 rule on the 4th period. From the rules obtained there were 17 rules have OCVR value smaller than 30%, thus these rules can be used to make marketing strategies. Product bundling and shelves product arrangement based on obtained rules were proposed as marketing strategies to promote product sales.
Design of Power Monitoring Application
Authors: Surriani A , Pradana A B , Arrofiq M , Putra J T , Budiyanto M , Subekti L
Published: January 2020

the usage of electrical energy has increased significantly. Awareness of increasing electricity consumption has motivated many researchers to create various kinds of innovations to help reduce the energy crisis in Indonesia. So, it is necessary to consider educating the civilization to monitor the intensity of energy consumption as a good culture to monitor electricity consumption efficiently. This research aims to design an Android-based application based on the Internet of Things (IoT) that can monitor electricity consumption and trace the history of electricity consumption data. The monitoring application can calculate both the power used per hour and the estimated costs incurred. Application was made to monitor kWh meters using IoT, electronic design by using ACS 712 current sensor and NodeMCU 8260. Based on the experiments conducted, it was concluded that the Design of Monitoring Kwh Meter Monitoring Application with ACS712 Current Sensor Using Ubidots IoT Platform successfully worked to control the monitoring of the amount of electrical energy usage through IoT, which has only 0.35 % error.
Practical Aplication Of Reinforcement Of Remazol Dyes Substance On The Quality Of Cotton Material Using Fixation Waterglass
Authors: Khaliq Ab D , Chafidz A , Rahmillah F I , Dahliani W. N. , N Iffah Y
Published: January 2020

Reactive dyes are a dye that can react with cellulose or protein, thus providing good colorfastness. Reactive dyes, besides being used to dyeing cellulose fibers, can also dye wool and silk fibers. One of the reactive dyes is remazol. Waterglass is a durable strong alkaline compound in the form of a thick colorless liquid. The use of waterglass in the textile industry itself varies greatly, including as a color reinforcement in the fixation process. Because of its essential function, the waterglass has become an urgent material for craftsmen, especially abstract batik craftsmen. Waterglass like it can’t be replaced, but it turns out there is a material that can be formulated to make artificial waterglass from salt, boarding, and water. For the media on dyeing, you can use a cotton cloth. Cotton cloth has strong properties (even when wet still absorbs), attracts body heat, wrinkles, shrinks, or shrinks (unless appropriately handled), is damaged by the sun, sweat and decay.
5S Implementation of SME Readiness in Meeting Environmental Management System Standards based on ISO 14001:2015 (Study Case: PT. ABC)
Authors: Viranda D F , Sari A D , Suryoputro M R , Setiawan N
Published: January 2020

The application of 5S can be used in assisting environmental management system standards. 5S (Seiri, Seiton, Seiso, Seiketsu, and Shitsuke) is a simple concept in managing workplaces for efficiency and waste reduction as well as optimizing quality and productivity through an organized environment. An environmental management system is part of a management system which used to manage environmental aspects, compliance obligations, and opportunity risks. ISO 14001: 2015 as an international standard of the environmental management system which refers to the PDCA (Plan-Do-Check-Action) cycle. The environmental management system at SMEs faces greater limitations compared to large companies. 5S can be used as a tool to improve environmental performances by reducing waste, pollution, and energy which will be easier to identify and control. In this study, it’s explained how the influence of 5S in fulfilling ISO 14001: 2015 standards in electrical Batik stove SME in which the application of 5S is not optimal and resulting in compliance with environmental management systems that less than the ISO 14001: 2015 standards. Factors affecting the application of both 5S and EMS are leadership and commitment, knowledge and training, communication, employee participation and motivation, and external factors such as law and regulation.
Development of fermented vegetables in their ability to inhibit pancreatic lipase as antidyslipidemic agent
Authors: Maryati Y , Susilowati A , Aspiyanto
Published: January 2020

Improvement of public awareness of healthy living encourages the increase of demand for natural food products and provides health benefits for the body. Cardiovascular disease caused by atherosclerosis of blood vessel walls and thrombosis is the leading cause of death in the world. Dislipidemia and coagulation disorders are one of the most significant risk factors for the development of atherosclerotic conditions. The purpose of this study is to develop one of the healthy food products from fermented green vegetables (spinach, broccoli and katuk leaves) fermented by kombucha culture during fermentation as a functional beverage in its ability inhibits pancreatic lipase as anti-dyslipidemia. Results showed a correlation between the ability to defend against free radicals and the ability to inhibit pancreatic lipase enzyme activity. The optimum conditions obtained in the fermentation of katuk leaf vegetables based on the ability to inhibit pancreatic lipase activity (% inhibition) and the ability to inhibit free radicals (DPPH), which is for 6 days fermentation of 91.44%, and 88.62%, with a pH value 3.98.
Making of bioethanol banana weevil as renewable energy
Authors: Khaliq Ab D , Chafidz A , Lukman M A , Kholil I
Published: January 2020

In Indonesia where population is increasing significantly each year, managing the usage of fuels and searching biofuels alternative is an important thing to study. Banana is abundant in every region which resulted in waste. The fermentation of banana pseudo stem to bioethanol is interesting to proceed in mass production. S. cereviceae is used as a yeast and the ethanol content was estimated from samples by using gas chromatography. The results shown that all types of banana can be utilized to produce bioethanol. Based on three types of banana used in this study, uter banana produces more bioethanol and higher level percentage than becici and kapok bananas. The longer the fermentation process, the higher the bioethanol content.
Influence of Transglutaminase Enzyme Incorporated into Protein based Edible Coating for Preservation of Spanish Mackerel Fish (Scomberomorus commersoni)
Authors: Karina S , Setiadi
Published: January 2020

Transglutaminases have been utilized in food technology to modify protein to improve rheological properties of food material or product. Edible coating is viscous solution that contains polymer structures, forming thin layer that covers surface of food material. Edible coating maintains quality of food product by becoming a barrier and protecting the surface from spoilage from internal and external causes. In this study, several concentration of transglutaminase enzymes were applied, acting as cross-linking agent into protein-based coating solution for coverage of Spanish mackerel fish meat. The fish meat samples were stored inside fridge with temperature of 10°C. Quality of fish meat was assessed each 5 days during 15 days of storage. The assessment of quality includes water content, pH and total volatile base of nitrogen (TVBN). Fourier Transform Infra-Red (FT-IR) was used to identify the activity of transglutaminase enzyme by the changes of detected functional group. Addition of transglutaminase has improved barrier properties of edible coating that maintained water content of fish meat better than control sample, but the by-product of enzymatic reaction has decreased quality of fish meat according to pH and TVBN results. FTIR spectroscopy showed changes in the secondary structure of protein (amide II).
Reducing waste order production process more efficient approach effective and lean manufacturing (Journal Review)
Authors: Khairunnisa  , Hidayati Juliza , Shalihin Ahmad
Published: January 2020

Competition in the world of business goods industries such as the furniture / furniture are increasingly stringent and evolving demands of companies to always make improvements and increased performance so as to develop better and compete with other competitors. Companies should employ Lean Manufacturing approach to produce efficient products to reduce production costs through efficiencies. Wastage contained in Lean manufacturing concepts include overproduction, excess material transportation, waiting, unnecessary processes, inventory, movement and defective products. The use of value stream mapping to identify wastage and explore the potential for waste at the firm. The potential of the waste will be reduced using appropriate instruments based on selected indicators. In this paper is expected to result in a more efficient production process so as to reduce production costs and will generate higher profits especially industrial goods.
The current strength welding analysis of electrode E6013 and E7016 type CS32 steel to the flows on microstructure and hardness
Authors: Adiman  , Budiarto  , Aprillius
Published: January 2020

The research on the effect of welding current strength on microstructure and hardness on CS32 type steel with electrode wire E6013 and E7016 has been carried out. This research uses CS 32 type concrete reinforced steel or low iron alloy steel treated with variations of electric current 90, 100, and 125 Ampere using reverse polarity DC SMAW welding with E7016 and E6013 electrode wire with a diameter of 3.2 mm and 20 cm long, and V with a 50 ° angle. The results of microstructural characterization showed that the metal base area in the form of ferrite (white) and pearlite (black) phase, and the HAZ region Widmanstatten phase (ferrite, pearlite and bainite) and the central weld area were bainite, ferrite fascia, and elastic phases with granules smooth. The results of this study indicate that the hardness value of welding CS32 type iron is reached at 271 HV, in the HAZ region of 100 Ampere electric current, the shape of the Widmanstatten phase structure (ferrite, pearlite, and bainite).
The comparison between influence of reducer and inner pipe diameter to the pressure and velocity of gold slurry using 3D solid work simulation
Authors: Antonius Dikky , Turnip Kimar , Atmadi Priyono , Nawiko Romeo
Published: January 2020

Gold mining Pipe with slurry was modified to observe its effect in pressure-discharge pipe. The fluid was transport using centrifugal pump, while the model simulated using solid work 2018 edition. Three models used in this case were: 28-inch pipe without reducer-pipe; 30-inch pipe without reducer pipe, and 28-inch pipe with reducer-pipe. Each model will produce the discharge pressure, slurry velocity, and the friction. The result shows that the 30-inch pipe without reducer will increase the pressure on the discharge pipe. However, the pressure is not as homogenous as 28 inch-pipe without reducers. 10 % of slurry produced less pressure because the friction occurred in the wall caused by the diameter difference. Meanwhile, the models in 28-inch pipe with reducer-pipe clearly show significant improvement of discharge-pipe pressure. However, the pressure is variety from the centre to the edge of the pipe, with the highest pressure located in the centre of pipe.
Exergy analysis of double slope passive solar still
Authors: Saragi Jandrifan HT , Napitupulu Farel H , Nasution A. Halim , Ambarita Himsar
Published: January 2020

Solar still is processes that can be used to convert available water into clean water. To find out whether the exergy used in the evaporation process has been used optimally in terms of quality, the second law of thermodynamics is used or known as exergy analysis. The purpose of this study was to determine the magnitude of exergy and exergy efficiency of a double slope passive solar still. The results showed that the solar intensity, water temperature, and ambient temperature affected the magnitude of exergy and exergy efficiency. The higher the solar intensity and the temperature of the water, the higher exergy and efficiency of the exergy, and the higher the ambient temperature, the exergy of evaporation in the system will be lower. The daily exergy varies from 0.021 kWh to water temperature and average solar intensity 32.26 °C and 97.9 W/m2 to 0.525 kWh for water temperature and average solar intensity 45.42 °C and 420.855 W/m2 and exergy efficiency varies from 0.928% to 5.363%.
Energy analysis of double slope aktive solar still
Authors: Damanik Wawan Septiawan , Napitupulu Farel H , Nasution A. Halim , Ambarita Himsar
Published: January 2020

The technology of distilling seawater into fresh water has been carried out with various models and methods. The distillation process is one of the effective methods to get clean water by utilizing solar energy as the main energy source. The model is planned for a dual slope active system with a basin area of 1,932 m2 wide with 1 m2 glass surface with two pieces with 3 mm glass thickness and 15° glass slope angle. The water level from the bottom of 20 mm is kept constant and given a fog that circulates the water in the basin. The lowest solar intensity was 186.9 SR,W/mA2 with the amount of energy absorbed 20.9761 W/m2, and the highest solar intensity 700.6 SR,W/mA2 with the amount of absorbed energy 1813,667 W/m2 °C. The energy efficiency obtained from the results of the discussion of the highest test results data on the seventh day reached 77.92 %, and the lowest efficiency on the second day was 66.1853 %.
The simulation performance analysis of the EAHE open system with finned iron pipes
Authors: Ginting Manik T.U.H.S. , Sitorus T. B. , Pasaribu J. , Pratama N. , Boer W.
Published: January 2020

This study focuses on the Eart-Air Heat Exchanger (EAHE) which serves to reduce the energy consumption of air conditioning units, and analyze the thermal performance of air-ground heat exchangers using computational fluid dynamics modeling and validated against experimental observations. The simulation used is for flow-resisting, incompressible, turbulent, and 3-dimensional. Simulations were carried out using finned iron and PVC 3.0 “with a thickness of 2 mm and a length of 6.7 m. The simulation conditions were limited to the fluid flow with variations of the velocity of 1 m/s, 2 m/s, and 3 m/s. The average air temperature outlet from 3D simulation using Ansys 17.0 software was obtained 25.45 °C for the velocity of inlet air of 1 m/s, 25.73 °C for a velocity of 2 m/s, and 25.84°C for the velocity of inlet air of 3 m/s. The experimental results obtained of 25.99 °C for a velocity of 1 m/s, 26.33 °C for a velocity of 2 m/s, and 26.0 °C for the velocity of inlet air of 3 m/s. The highest deviations between the simulation and experimental results were obtained at -3.04% for the velocity of 3 m/s, and the lowest deviation is -10.28% for the velocity of 1 m/s. The average of COP value of the simulation results is 0.703 for the velocity of 1 m/s, 0.624 for the velocity of 2 m/s, and 0.774 for the velocity of 3 m/s, while the experimental results are obtained 0.6307 for the velocity of 1 m/s, 0.5417 for the velocity of 2 m/s, and 0.7504 for the velocity of 3 m/s. For the average effectiveness value of the simulation results were obtained of 0.956 for the velocity of 1 m/s, 0.940 for the velocity of 2 m/s and 0.960 for the velocity of 3 m/s, while the experimental results were obtained of 0.8590 for the velocity of 1 m/s, 0.8164 for the velocity of 2 m/s, and 0.8970 for the velocity of 3 m/s.
Utilization of peltier cooling systems driven by solar power for storing vegetables and fruits
Authors: Sitorus T. B. , Lubis Z. , Sembiring F. , Christopel B. , Siagian J. A., R.
Published: January 2020

This article aimed to determine the performance of the Peltier cooler box system that utilizes solar power for storing vegetables and fruit. The advantage of the Peltier cooling system is that it does not consume electricity and environmentally friendly. The thermoelectric component is coupled with a heat sink where a small fan is placed on the outside, and another fan is set inside the cooler. Data is obtained from the measurement system and then analyzed so that the performance of the cooling system can be determined. The experiment is carried out in a location that is exposed to solar radiation. The process of measuring weather conditions is carried out by using a weather instrument. To record the temperature distribution on each component of the Peltier cooling system are used thermocouples which are connected to the data acquisition. Experimental results show that the minimum temperature that can be achieved on vegetables and fruits ranging from 17.324°C. The average temperature of vegetables and fruits during the experiments varies from 22°C. The results of this experiment indicate that the Peltier cooler box tested can be used to maintain the freshness of vegetables and fruits. The maximum COP value of the Peltier cooling system tested is 0.670, and the minimum COP value is 0.428.
Effect of multi –stages vapor compression refrigeration cycle using refrigerant R32 for Air-Conditioning unit
Authors: Sihombing H V , Ambarita H , Naibaho Waldemar , Setiawan E Y
Published: January 2020

Vapor compression cycle is mainly employed as a refrigeration cycle in the Air-Conditioning (AC) unit. In order to save energy, the Coefficient of Performance (COP) of the need to be improved. One of the potential solutions is to modify the system into the multi-stages vapor compression cycle. The present work deals with the investigation of single-stage and multi-stage vapor compression refrigeration cycle. A typical vapor compression cycle that is used in the AC unit is taken into consideration. The used refrigerants are difluoromethane R32. The analysis using the simulation process by utilizing software Aspen One. The performance parameters includes COP, the mass flow rate of the refrigerant and compressor power. It was shown that there exists a maximum COP for multi-stage. By taking these performance simulation results the multi-stage is the efficient method for the air conditioning system.