bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Research on Tapped Inductor of Large Step-up Ratio DC/DC Converter
Authors: Wu Lihua , Chen Yiwen , Yang Shuang
Published: December 2020

The design and manufacture of magnetic components such as inductors need to estimate theoretical parameters based on the working characteristics of circuit on the one hand, and select the magnetic core and winding method by experience to determine the manufacturing plan. The parameters and performance of magnetic components obtained by different winding methods are usually different, so the design results have certain uncertainty. In order to better obtain system indicators, a design method for the design of the tapped inductor of large step-up ratio DC/DC converter is proposed to calculate the key parameters such as the turn ratio and inductance of the tapped inductor. The optimized winding scheme method of the tapped inductor is proposed by combining electromagnetic field simulation and circuit simulation. The simulation results show that the theoretical parameters obtained under the proposed method are correct, and multiple performance indicators of the tapped inductance corresponding to the converter circuit under different winding modes can be obtained, which is convenient for the designer to find the best appropriate production plan according to actual needs.
Research on Wind Deviation Detection Based on DENCLUE Abnormal Working Condition Filtering
Authors: Yin Xianlong , Shi Yijie , Xu Xinda , Duan Yongchun , Jia Yaowu , Chen Gang , Zhang Xinyue , Yin Feifei
Published: December 2020

Aiming at the problem that the wind vane of wind turbines has a deviation to the wind, which damages the power generation efficiency of the unit, a filtering method of abnormal working conditions based on DENCLUE density clustering is proposed, which mainly included two stages of working condition screening and calculation of the angle of the wind deviation. Firstly, the density clustering algorithm based on DENCLUE is used to filter the working conditions of the data and to filter out the working condition data of abnormal power generation. Then, the data is further processed, including data smoothing and wind speed binning. Furthermore, according to the relationship between the output power of the unit and the yaw angle of the wind deviation, a regression model is established to obtain the wind deviation angle of the unit. Finally, the method is verified through the actual operation of SCADA data. The results show that after filtering the working conditions, more stable output can be obtained and the performance of the unit can be obviously improved.
Calculation of electric field in wire penetration monitoring device on strong electromagnetic environment
Authors: Hao Jianhong , Zhang Yuguan , Shi Haipeng , Liu Lianguang
Published: December 2020

In a strong electromagnetic environment, there is a great demand for the parameters needed to monitor the operation of lines or substation equipment, and the reliability of the monitoring device is a problem that needs to be researched. According to the need for heat dissipation and assembly of the cavity of the wire penetration monitoring device, for the high-voltage and high-current wire access point and the hole structure inside the device, this paper establishes a cavity model with a ring-shaped gap through a wire and derives the analytical formula of the electromagnetic field in the cavity, then the influence of plane wave pitching angle, the structure parameters of the conductor and the position of the wire on the internal resonance characteristic transformation of the through wire cavity are analyzed. The simulation analysis results can be used for the structure and shielding design of the wire penetration monitoring device under the electromagnetic environment of transmission lines and substations.
Comparative Analysis of the Application of BPA and PSCAD in Voltage Sag Simulation
Authors: Zheng Zongan , Wu Minhui , Chen Jingteng , Li Huibin , Ruan Zhengxin , Zhang Yi
Published: December 2020

As there is no special engineering software for simulating voltage sags caused by grid faults, this paper compares the differences between the existing BPA and PSCAD simulation software in the voltage sag simulation process, and analyzes the applicability. First, analyze the similarities and differences between the transient and steady-state characteristics of the basic devices in BPA and PSCAD, as well as the parameter conversion method; Secondly, based on actual grid data, two sets of software are used to model and simulate the voltage sag caused by grid faults. Finally, through the comparison and analysis of simulation results, the different applicability of the two sets of simulation software in voltage sag simulation is summarized.
Equivalent calculation of aperiodic component of thermal effect of DFIG with short circuit fault
Authors: Li Yongbo , He Chuan , Zhang Yahai , Qian Hanhan , Li Shenghu
Published: December 2020

The temperature rise caused by three-phase short current at stator side of doubly fed induction generator (DFIG) may damage DFIG and its adjacent electrical equipment. By using the step-by-step integration, the thermal effect may be quantified, but the contribution of periodic component and aperiodic component of thermal effect cannot be distinguished, and the amount of calculation is large. In this paper, the steady-state component of rotor flux is considered to reduce the error of analytical expression of short current. The components of short current are decomposed and the square of the short current is integrated. The calculation method of equivalent duration of aperiodic component of thermal effect is proposed, and the effect of equivalent duration on different crowbar resistance and stator voltage drop ratio is quantified. The simulation results are provided to validate the accuracy of the proposed models.
Ultra-High Frequency Partial Discharge Signal Recognition in GIS based on Fisher Linear Discriminant Theory
Authors: Xudong Pei , Xubing Pei , Haiqi Xu
Published: December 2020

In this paper, dual tree complex wavelet transform (DT-CWT) is used to decompose UHF partial discharge (PD) signal in multi-scale. The optimal decomposition level of complex wavelet is solved. The wavelet energy features of real part and imaginary part of UHF-PD signal under the optimal decomposition scale are extracted. Fisher linear discriminant method is used to select the features of energy features and to identify the PD types. The results show that the optimized real part and imaginary part high frequency wavelet energy features can effectively identify four kinds of typical insulation defects, and the recognition rate can reach to 92.5%. Meanwhile, the optimal complex wavelet energy (OCWEF) feature has better sensitivity and recognition effect in PD type identification.
Effect of binding wire on electric field distribution of overhead insulated conductor in distribution network
Authors: Liang Yuanpeng , Xiang Nianwen , Li Kejie , He Kai , Yang Jin , Tian Ye , Zhou Lijun
Published: December 2020

In recent years, the ablation damage of overhead insulated conductor on the top of insulators has posed a threat to the safe and stable operation of distribution network. In this paper, a three-dimensional model including insulator, binding wire and conductor is established in the finite element simulation. Then analyse the influence of the existence of binding wire and the diameter of binding wire on the electric field distribution of conductor. Providing a theoretical basis for the cause and prevention of the ablation damage of conductor insulation layer. The simulation results are as follows: When binding wire exists, electric field distortion will occur in the insulation layer and surface air around the conductor. The maximum electric field intensity of the surface air around conductor reaches 15.5kV/cm, which is about 690% higher than that without a binding wire. The maximum electric field intensity of the insulation layer reaches 4.3kV/cm, which is 980% higher than that without binding wire. In addition, as the diameter of the binding wire increases, the maximum electric field intensity in the insulating layer decreases and the maximum electric field intensity in the air on the surface around the conductor has small change.
Coordinated Optimization Model of Planning and Operation of Integrated Energy System Based on Mixed Integer Programming
Authors: Wang Xiaohui , Xu Nan , Liu Yaqiong , Lu Yanchao
Published: December 2020

In recent years, the planning and operation of integrated energy system has received extensive attention. The traditional two-stage nonlinear model of planning and operation has problems such as inability to reach the global optimum and low solution efficiency. By linearizing the nonlinear constraints, this paper introduces a coordinated optimization model of planning and operation of integrated energy system based on mixed integer programming, which takes the minimum annual cost as the objective function and considers the coupling characteristics of electrical, thermal, and cooling load. The model achieves the optimal capacity configuration and operating scheme at the same time. Results of the testing data verify the effectiveness of the model.
Study on Anti-Magnetic Pollution Ability of Ni-Cd Battery
Authors: Xu Chaoqun , Han Xiaodong , Liu Chaobo , Meng Lifei , Xiao Qi , Yi Zhong
Published: December 2020

Ni-Cd battery pack is an important part of spacecraft, and its performance is easily affected by the changing magnetic field. In order to grasp the anti-magnetic pollution ability of the battery pack, this paper conducted a charge and demagnetization test study on the battery pack in a magnetic field environment simulation site by adjusting the intensity, frequency, waveform and other magnetic parameters to investigate the charging and demagnetizing effect of the battery pack. The results show that the Ni-Cd battery pack has weak resistance to magnetic pollution and is easily magnetized. In addition, when the magnetic strength is 4.5 mT and the frequency is 1.5 Hz, the demagnetization in three directions of the Ni-Cd battery pack can be well accomplished. This study provides a reference for the use of Ni-Cd battery packs in the magnetic environment and the removal of magnetic pollution effects.
Application of acoustic imaging technology in power transformer condition evaluation
Authors: Hao Ma , Minghui Duan , Chuang Yao , Wei Wang , Junji Feng , Liqing Liu
Published: December 2020

Power transformer is the core equipment of the power system. Its operation status directly affects the security and reliability of the whole system. Therefore, it is of great significance to evaluate its status timely and accurately. Acoustic imaging technology is first used in medical, communication and other fields, which can effectively sense abnormal sound and locate it accurately, which greatly improves the work efficiency. This paper introduces the application of acoustic imaging technology in live detection of power transformer. The result shows that the combination of acoustic imaging technology and traditional live detection technology can improve the working efficiency of live detection and the accuracy of transformer condition evaluation, which is conducive to maintaining the safe and reliable operation of power grid.
Integration Of Quality Function Deployment (QFD) And Value Engineering In Improving The Quality Of Product : A Literature Review
Authors: Ginting Rosnani , Riski Satrio Muhammad
Published: December 2020

Product development using the QFD method is often applied in the industry to meet customer satisfaction by improving quality. Quality improvement is an important factor for a company to be able to maintain its existence in the industrial world. Value engineering is used to provide improvements to the materials used to reduce production costs. This paper discusses the Integration of QFD with Value Engineering in the product planning process. QFD improves service/product performance based on customer requirements, whereas Value Engineering changes the cost of a service with product regardless of mode of work and quality. The combination of QFD and Value Engineering methods focuses on costs and improving services and products. This paper describes the integration of the two methods given the implementation simulation implementation. The methodology is used to collect, analyze, and display data used for the design process. This paper summarizes the experience gained during implementing QFD and Value Engineering for component redesign improvements. Research shows that this method is used to keep the team focused in carrying out the design.
Design of Standard Operational Procedures of Flip and Lifting Material Processes
Authors: Ardinata B I , Fajrah N
Published: December 2020

The manufacturing industry is inseparable from the process of lifting material using a crane. The demands of the machining process require the material to be flipped and lifting material. In many companies, flip and lifting material is a high-risk process, because the material has a big load so can be potential to work accident. Mostly, the operator of the crane does the flip material process based on their experience, so that each operator has a different way. The design of SOP aims to equate the procedure and to reduce the HARC score so that the process becomes safer and controlled. The approach that the researchers used was the RIE project. Based on the design of SOP, founded that SOP for flip and lifting material is highly recommended for the operator of a crane, so the operator can work safely. Based on the validation process with the HSE Expert, the SOP is declared as a suitable guide for the operator in conducting flip and lifting material. Therefore, the HARC score decreased from 6 to 4. It means the process of flip and lifting material is safer and still needs continuous improvement with the SOP to the next improvement with different conditions.
Design of Effective Positioning and Form of Front-of-Pack Nutrition Labelling on Food Products Based on Eye-Tracking Method
Authors: Winarno D A , Link S , Muslim E , Moch B N
Published: December 2020

Nowadays, Indonesian consumers are very lacking in attention to nutrition labels. This research focused on front-of-pack nutrition labelling. Based on a research conducted in US, Europe, Australia, and New Zealand, front-of-pack nutrition labels ease consumers to choose healthier food products. The objective of this research for the food manufacturers is as a recommendation of effective front-of-pack nutrition labelling, and for the consumers as a consideration to choose proper and healthier products. This research was begun with consumer preference questionnaire and was continued with eye-tracking. The results of questionnaire and eye-tracking were compared and were validated using eye-tracking. This research shows that the most effective front-of-pack nutrition label should be placed at upper left and using PDI (Percent Daily Intake) format.
Product design of post-stroke static bicycle
Authors: Ginting Rosnani , Ishak Aulia , Syahda Aulia
Published: December 2020

This research was conducted to design a standart static bicycle for post-stroke patients using Quality Function Deployment method combined Analytic Hierachy Process, Value engineering, and Brainstorming model. The product was designed from strong metal material, portable, by considering the strength to withstand the load, ergonomic aspects, and the stability. Quality Function Deployment was used to determine the characteristics of the product. pair wise comparison in Analytic Hierachy Process model was chosen to obtain and identify the optimum attributes alternative. Meanwhile, Brainstorming applied to collect and generate various ideas of characteristic products. Open and closed questionnaire were used as a survey tool. The results showed that optimum weight is on the backrest material, while the smallest weight is the color of the additional function.
Design of Anti Overload Bag product with the Nigel Cross Approach
Authors: Ginting Rosnani , Ishak Aulia , Sihombing Nicholas , Ramadhan Muhammad
Published: December 2020

The use of a backpack that is not appropriate has a significant negative impact on users. These negative effects can cause back pain and changes in body posture. Many students who carry backpacks on their backs exceed 10% of the total body weight. Therefore, an innovative backpack product, Anti Overload Bag. This bag is equipped with sensors and alarms that will sound if the load that lifted does not match the load that it should be. In the process of making the product design, the Anti Overload Bag is first used a brainstorming technique to determine the characteristics of the product to be made, then draw conclusions from the brainstorming that has been collected. Then the sampling technique done by distributing open and closed questionnaires to determine the type of product. Then a market survey is conducted using a sampling technique, to determine the validity and reliability of the main products with products of competitors I, II, III. Sub problem steps to sub solutions are carried out to determine the Product Quality Function Deployment (QFD). The sub-solution step to the solution is determined to generate and evaluate alternatives by the sum of the paired matrices between attributes.
Design of the box type evaporator in the solar adsorption refrigerator
Authors: Sinurat N S , Sitorus T B , Hutasoit M B , Putra M F , Siahaan P B M
Published: December 2020

The evaporator is a device used to separate two phases between liquid-gas and liquid-liquid by using heating media. The model uses aluminum material with dimensions 170 mm x 170 mm x 240 mm and uses 3 mm aluminum thickness and three pieces of aluminum pipe with dimensions of 100 mm. The choice of material used it aims to obtain optimal results from the work of the evaporator. The effect of temperature is significant in the process that occurs in the evaporator will determine the effectiveness of the evaporator so that it can separate the water content in methanol. By heating, until one component evaporates on its boiling route, it can separate it from other parts by using methanol with 90% purity. The results of the design that is made produce an evaporator with a volume of 5 liters. The minimum evaporator temperature obtained during testing occurs in the second cycle of 0.5°C. Several factors affect the performance of an evaporator. The total heat needed in the process of reducing the maximum water temperature to the minimum water temperature and the latent heat required by methanol to evaporate.
Aromatherapy Pillow Design Using QFD Method to Cure Pinched Nerve
Authors: Ginting Rosnani , Ishak Aulia , Humaira Chalisa
Published: December 2020

The therapeutic hot pillow is a blend of science and ancient health techniques concoction that are Able to cure various ailments and maintain the body. Heat therapy can open blood vessels wider, thus increasing blood flow and supply of oxygen and nutrients to reduce pain in joints, muscles, and ligaments. Warm temperatures can also reduce the potential for muscle spasms. The specific purpose of this product design is to cure neck pain. The sub-issue of the Aromatherapy Pillow product / device specification will find a sub-solution with steps from Nigel Cross, Determining product characteristics with Quality Function Deployment (QFD). Evaluate alternatives by using Pairwise Comparison and AHP measurements to calculate the weights of each attribute and determine the ranking of each alternative. Value Engineering is the final step of the design process in order to increase of the value of the product for the consumer and reduce the cost to be paid by the manufacturer. Value engineering steps are to list the product components and identify the function of each component, determine the value of the identified function, calculate the cost of each component, find ways to reduce costs without reducing value, and Ultimately Evaluate alternatives.
The box-type condenser design used in solar adsorption refrigerator
Authors: Siahaan P B M , Sitorus T B , Hutasoit M B , Sinurat N S , Putra M F
Published: December 2020

This study aims to create a fin-type condenser design on a solar adsorption refrigerator with a cross-flow to condense the working fluid, methanol, cooling fluid, and environmental air. The designed condenser has a height of 57 cm, a width of 40 cm. A diameter of horizontal pipe 2.5 cm, a diameter of vertical pipe of 1.9 cm, the distance between pipes 5 cm, fin length of 40 cm, fin width of 7 cm, fin thickness of 0.2 cm, the distance between the fin is 2.05 cm, the number of fins 15 pieces, the number of vertical pipes 5 and 2 horizontal pipes. From the theoretical calculations, the effectiveness of the condenser 0.57.
Product Design of a Multifunctional Wheeelchair Using Nigel Cross Approach
Authors: Ginting Rosnani , Ishak Aulia , Diyana Etaniya Lani
Published: December 2020

A wheelchair is a tool used by people who have difficulty walking due to illness, injury or disability. In general, wheelchairs can only be used for sitting and as a tool that helps users move from one place to another. The multifunctional wheelchair that will be designed aims to make it easy for wheelchair users to carry out their activities. This multifunctional wheelchair has an additional function in the form of a toilet as a place to defecate and is equipped with a table and basket. In the process of making this multifunctional wheelchair product design, first a brainstorming technique is used to determine the characteristics of the product to be made, then draw conclusions from the brainstorming that has been collected. Furthermore, the sampling technique was carried out by distributing open and closed questionnaires to determine the type of product. Then conducted a market survey using sampling techniques, and determine the validity and reliability of the main product with competitor I, competitor II and III competitors. The step of the problem to the sub-problem is determined in order to classify the objectives to be made in designing a multifunctional wheelchair product.
Design assembling and testing of the oil palm bunches cutting machines
Authors: Hamsi A , Sitorus T B , Isma T B
Published: December 2020

One of Indonesia plantation products, which is considered very potential and strategic to be developed, is palm oil, which is a national mainstay product, and palm oil has a bright prospect for the growth of plantation commodity exports when compared to other vegetable oil products. Harvesting oil palm is cutting fresh fruit bunches from trees to transportation to the mill. This tool is designed from a lawnmower by changing the motion of lawn blades into a back and forth translational motion. Trimming or cutting blades will be converted into a back and forth movement of movements to cut oil palm bunches. From the results of this development found the results of research in the form of the speed required by the machine that is 1400 mm/min then the power needed to cut fresh fruit bunches with age 3-8 years which weighs 3.5-13 kg/bunch is 0.81 kilowatts or 810 watts which have a 6000 rpm combustion motor rotation using a cutting blade whose material is steel with an angle of 1350 with a pole length of 2.9 m which can be extended to 4.5 m.
Design of Multifunction Wheelchair with Nigel Cross Method
Authors: Ginting Rosnani , Ishak Aulia , Tefila Purba Agnes Aneni
Published: December 2020

Product design can be done with the initial steps of a systematic approach that is making concept ideas and evaluating them. With the concept, the product design is required to have a concept development, as well as testing of the concept. This research aims to add a multifunctional design to an existing product, a lever for an adjustable chair, and a place for drinking bottles. The design attributes are obtained from the designer’s brainstorm. The size of the design is obtained from a direct field survey of market desires for Multifunctional Wheelchair Products. This Multifunction Wheelchair was created because. Manual wheelchairs have the disadvantage of requiring a lot of energy for their users. The specifications of the Multifunctional Wheelchair are obtained from distributing questionnaires to the elderly and disability in hospitals. QFD method discusses a comparison between Multifunctional Wheelchair Products, with 3 other competitors with the same attributes. Solving each problem, resulting in sub-solutions from Nigel Cross’s steps to maintain product excellence. Pairwise Comparison and AHP calculate the weights of each attribute then rank them. The final step is value engineering to increase the value product for consumers and reduce the cost of producing.
Integration of Kansei Engineering and Quality Function Deployment (QFD) for Product Development : A Literature Review
Authors: Ginting Rosnani , Ishak Aulia , Fauzi Malik Alfin , Satrio M Riski
Published: December 2020

Kansei is a Japanese word that means consumers’ feelings and psychological imagery about new products. Kansei Engineering aims to produce new products based on the feelings and demands of consumers. Quality Function Deployment can be defined as a mechanism or process for determining customer requirements which are further translated into technical characteristics, so that every level of organization and functional area are able to understand and make improvements to achieve the objectives of consumer product selection that now seems irrational. However, price, quality assurance and functionality are no longer the choice’s main criteria, but what attracts and invites the five senses has become the choice. Spoiling customers is now critical issues to long-term business success. Through Kansei Engineering can help translate customer feelings into design specifications, while QFD can help companies to determine customer desires. This paper provides a combined analysis of method reviews from Kansei Engineering with Quality Function Deployment. Several international journal articles published in 2010-2019. Thorough analysis has been carried out and focused on this paper on practical use.
Quality Control Analysis on Poly cups Products Using Six Sigma Approach at PT “X”
Authors: Ishak Aulia , Siregar Khawarita , Daniel Damanik Jamichael
Published: December 2020

Quality in the manufacturing industry besides emphasize on the products produced, also need to be considered quality in the production process. Thus, the final product is defect free and there is no more waste to be paid handsomely because the product must discarded or reworked. PT. “X” is a company in the form of a Limited Liability Company in Deli Serdang Regency, North Sumatra. This limited liability company was established by several. PT. “X” is engaged in manufacturing namely producing poly cups. This company can produce 3900 poly cups box cartons / day. In a day can produce 352,800 poly cups/day. This quality control research was conducted at PT “X” with the product produced was poly cup. The study was conducted to determine the attribute defect of the poly cups with poly cups divided into 23 subgroups. Sampling is done by systematic sampling. Then, Six Sigma is one of the approaches that is used in this company quality control such as another make to stock company type.
Lean Manufacturing Approach to Minimize Waste in The Process of Sorting Palm Oil Using the Value Stream Mapping Method
Authors: Fitriadi  , Sofiyanurriyanti  , Lubis DA , Pamungkas I , Irawan HT
Published: December 2020

This research uses lean manufacturing approach and mapping the production line of a product which includes material and information from each work activity using value stream mapping method to minimize waste. Problems faced by oil palm companies can be seen in more detail in the sorting process. The company does not realize that there are many ways of working that can be improved to become more effective and efficient, from checking to grouping the quality standards of palm oil. The sorting activities are carried out from weighing FFB to selecting the quality of oil palm. The results of this study showed that the value-added activity was 69.9920863 minutes with a process cycle efficiency rate of 27.392122%. After repairs were made, it was found that the activity of moving the palm fruit to the sorting station, the palm fruit waiting to be unloaded from the truck, the palm fruit being unloaded and sorted from the truck in the palm sorting process is an activity that has no added value, so it needs to be improved. The improvement results show an increase in process cycle efficiency to 46.909592%.
Evaluation of Service Quality of Public Transportation (Study Case of Trans Padang)
Authors: Henmaidi  , Jonrinaldi  , Yenny Hilmi
Published: December 2020

The quality of a service affects user satisfaction. The quality can be assessed based on the user’s perception. Paying attention to quality is important for any organization to survive and win the competition. The quality of a service can be defined as the gap between perception and expectations of a service. Perception is based on how customers perceived service based on services provided. Expectations are based on customer interest. This paper present service quality of Trans Padang, a transportation industry perceived by customer. We measure the level of quality using Fuzzy Servqual dan IPA Method. The aim is to find out the indicators that need to be improved for better service quality. The results show some aspects of service quality fall below customer expectations. We found the gaps of 12 indicators are negative. This indicate that the management need to pay serious attention in these areas to improve the service quality.
Assembly Line Balancing with Method Ranking Positional Weight (case study: XYZ Company)
Authors: Ginting Rosnani , William
Published: December 2020

A company uses several methods to increase productivity in the company. One of method used in increasing productivity is balancing production lines on each work element. Balancing the work track can be done by allocated work elements. The allocation of work elements in the work station can be seen at cycle time. Big difference in cycle time causes some work elements have bottlenecks. In achieving high productivity in a work station company must have a balanced workload. Effectiveness in the production floor aims to make the company achieve the desired production target of consumers. Companies failing to achieve production targets will have a negative impact on the company. The negative impact felt by the company in the form of losses. Ineffectiveness in production summary can be caused by differences between machine capacity and production capacity. Machine capsules that are smaller than the capacity of production cause the work elements must have accumulated. Effective production trajectories can be measured by producing high output with low resource utilization. The reason why companies often experience bottlenecks on a production floor is an imbalance of resources within a factory.
Slaughtering System Design in Halal Beef Supply Chain Using Value Chain Analysis
Authors: Wahyuni Dini , Nazaruddin  , Rizki M. Fauzan , Budiman Irwan
Published: December 2020

People prioritize the taste of food more than the Halal status, while Islamic law requires Muslims to consume Halal food. Halal Supply Chain management system is the system that involves Islamic principles in all activities from farm to fork. These three factors must be a concern: direct contact with haram (forbidden), cross-contamination, and Muslim perception. In the slaughterhouse, all the processes in slaughtering and handling the carcass must be able to guarantee the Halal status of the product. This research was done in four slaughterhouses. The observation was made in cattle feedlot, from all activities at the slaughterhouses to the product sent to retailers. The value chain of the slaughter system in the beef supply chain can be a guide for preparing business process in slaughterhouses as a provider of beef in the Halal Supply Chain.
Analysis of Crude Palm Oil Supply Chain using Food Supply Chain Network (FSCN): A Case Study
Authors: Matondang Nazaruddin , Hidayati Juliza , Buchari  , Permana Arifin Erik , Panama Jeffrey
Published: December 2020

Palm oil industry is one of the leading industrial sectors in Indonesia. In order to fulfill CPO demand as well as increasing of CPO sales, a research to analyse the supply chain flow of CPO was conducted. This research was conducted in ABC company, which is a privately owned business entity engaged in oil palm plantations located in South Tapanuli Regency, Indonesia. Analysis of supply chain had been done by using Food Supply Chain Network (FSCN) to define the integration of key business processes provided by original suppliers that provide products, services, and information from end users to customers and other stakeholders. Result of this research clearly defined the supply chain process with a clear flow of material, information and finance. The key process of CPO supply chain is the distribution of raw materials of CPO, namely fresh fruit bunches (FFB) which were collected from privately owned oil palm plantations and nearby community gardens, then processed in mills, deliver to storage tank, and export to customers. Analysis of this case study provided a clear description of CPO supply chain and may let further researchers to easily examine the potential risks at each stages and actors of CPO supply chain.
Simulation Model of Replanting Eucalyptus : a Review
Authors: Sembiring Nurhayati , Lodewijk Napitupulu Humala , Tryana Sembiring Meilita
Published: December 2020

Eucalyptus has developed the supreme planted genus of tree species in the domain that often used as the main basic material for the pulp and paper manufacturing, the woodworking industry, food, equipment, etc. Replanting eucalyptus plants as an effort to optimize the productivity of plantation forests is one of efforts in supporting sustainable development. In this case, the replanting of eucalyptus as an industrial raw material can supply raw materials to industries in need such as the wood and pulp industry. This study focuses on exploring the impact of adoption technologies such as simulation, to analyzing about benefits and threats of eucalyptus in the spread of replanting. We recorded the publication date, journal title, simulation model, parameter of the simulation model, and the kind of eucalyptus species. We recapped the results based on the simulation model employed and the types of objectives and constraints that were used. The need to estimate the impact of the simulation model of replanting eucalyptus is an important element in the development and analysis of industrial forests and maintains sustainable development.
Proposed optimal maintenance intervals for milling machine using risk based maintenance and analytical hierarchy process at manufacturing plant
Authors: Farid D A , Budiasih E , Alhilman J
Published: December 2020

PT IIS is an outsourcing company that offers manufacturing spare parts and dies forging. In producing dies forging product PT IIS uses Milling machines, lathes, and CNC 20-L Liquy Hising machines. Based on machine failure data, milling machines suffered a total of 27 times failure during the 2018-2019 period, the frequency of failure will affect the production process and resulted in large maintenance costs. Thus, it takes more observation regarding the maintenance of the Milling machine. The method used for research is Risk-based maintenance (RBM) which aims to estimate and minimize risks arising from failure. The results of collection and processing using RBM revealed that Milling machines with 2880 hours maintenance intervals had a total risk of Rp6,395,124.84 with the percentage of 0.67% exceeding the company’s risk tolerance limit of 0.50%. Using the approach to minimizing risks, the proposed maintenance interval is 1100 hours and is at the company’s risk acceptance criteria of 0.50%. This study also uses the Analytical Hierarchy Process (AHP) method which decides the maintenance policies that are tailored to the company’s conditions, for Spindel components and rags using condition-based maintenance, and coolant hose components using time-based maintenance.
Analysis Work Standardization Using The Standardized Work Combination Table on CNC of Mission Case Line Process at PT Astra Otoparts, Tbk - Nusametal Division
Authors: Aisyah Siti , Purba H H , Dwi Setiaji Septian
Published: December 2020

PT Astra Otoparts Tbk. - Nusametal Division is manufacturing company that produce various types of metal part. In the Machining section, there is a new line producing parts of Mission Case. This line has not had the standardized work as an operator’s guide in running its production process. Hence, the Standardized Work Combination Table (SWCT) on Mission Case line is created to ensure operator works properly according to the work standard that has been made, to achieve predetermined production, and to prevent product defects. The creation of SWCT resulted in operator cycle time of 151 seconds/3 pcs and 166 seconds/3 pcs for cycle time of machine with operator idle time for 15 seconds that is 2 seconds faster than takt time.
Ant Colony Optimization Implementation on Traveling Salesman Problem to Achieve the Shortest Logistic Route
Authors: Tryana Sembiring Meilita , Chailes Steven
Published: December 2020

Transportation refers to the movement of everything from raw materials to finished goods between various facilities in the supply chain. In transportation, the exchange between responsiveness and efficiency is manifested in the choice of transportation modes. Because transportation costs can be as much as one third of the supply chain operating costs, the decision made here is very important. Traveling Salesman Problem is one of the best-known NP-hard problems where there is no precise algorithm to solve it in polynomial time. The ACO algorithm has good potential for problem solving and recent research that has attracted a lot of attention, in particular is the case of solving NP-Hard problems. One of the earliest best works is completing TSP using ACS (Ant Colony System). Ant System is the first ACO algorithm with its main characteristics being that at each iteration, the pheromone values are updated by all (m) ants who have built a solution in the iteration itself. From the arrangement of the shipping routes that have been implemented by the Ant Colony Optimization on the Traveling Salesman Problem, the amount of savings in the transportation mode of trucks to mileage is 37%.
Determination of the cost of patchouli oil production in South Aceh using break-even analysis
Authors: Irawan HT , Pamungkas I , Fitriadi  , Saputra A
Published: December 2020

This paper uses break-even analysis to determine the cost of producing patchouli oil in Kete Nilam Hijo (KNH). KNH is an industry engaged in the refining process of patchouli oil, located in South Aceh Regency, Indonesia. One obstacle faced by the KNH is that the costs of producing patchouli oil are not yet known. So far, KNH has never made economic calculations in producing patchouli oil. KNH only relies on production based on profit so that profits are not maximized and always fluctuates. In addition, the break-even point for the production of patchouli oil is also not known with certainty. To determine the break-even point, total costs and total revenue will be calculated first. This research was conducted in several stages, namely preliminary study, data collection, data processing, analysis of results, and finally concluding the results of the study. The results showed that the total production cost of patchouli oil refining at KNH in one year was 1,120,018,250 rupiah. Meanwhile, KNH had to sell 1,600 kilograms of patchouli oil to break-even.
Identification of criteria for determining the location of souvenir centers in batam city tourism
Authors: Fajrah N , Zetli S
Published: December 2020

Batam City as one of the largest city centers in the Riau Islands Province which was previously known as an industrial city, is now starting to turn into a tourism city. However, Batam tourism has not been equipped with a souvenir sales center to introduce Batam city characteristics. The aims of this research is to find out the criteria for determining the location of souvenir centers in Batam City Tourism. The method used in the data collection criteria is voice of customer, which is then analyzed from the statistical level. This research will provide several criteria that can be selected by respondents to determine the criteria for the location of the souvenir center. Based on the research results, it is known that tourists really need a souvenir center in a tourist city such as a complete, comfortable, and safe souvenir center is urgently needed by tourists. This is because souvenirs are part of the process of introducing the culture of an area to tourists. Therefore, the Batam city government needs to pay attention to the needs of tourists who travel to Batam City by providing a souvenir center in the tourist center of Batam City.
When Cermet Applied for Hard Machining of Steel: A Review
Authors: Arifin M , Ginting A , Sarjana S S , Suherman
Published: December 2020

Providing an information deals with the application of Ceramic Metal (Cermet) as a cutting tool applied for hard machining of steel is the objective of this review paper. Cermet is made of hard metals and was introduced just after the invention of Cemented Carbide. As a cutting tool, the conventional Cermet was known as TiC-based Cermet. Unfortunately, it was not as successful as Cemented Carbide due to its brittleness of low fracture toughness of TiC substrate. Thanks to TiN material. The addition of TiN improved the fracture toughness, and the modern era of Cermet was begun. A TiCN-based modern Cermet is characterized microstructurally by a structured hard phase featuring core-rim structure embedded in a tough Co-Ni binder. The effort to refine the fracture toughness of TiCN Cermet is discussed in this paper including the effort to raise its performance through coating technologies. In particular, its performance which is given in term of productivity and represented by volume of removal rate (VMR) is discussed. Finally, conclusions and recommendation for future works are written.
A Review: Development of MQL systems applied for metal cutting
Authors: Lubis M I J , Ginting A , Sutarman
Published: December 2020

Today, there is a remarkable progress to reduce the costs of tooling, production, maintenance and to increase efficiency in metal cutting operations. The practice of machining process under dry cutting has become common in the metal machining industry, but it has weaknesess. To enhance dry cutting, the minimum quantity lubrication (MQL) technique has been introduced. MQL is a very promising solution as an alternative both to replace the conventional flood cooling and to enhance the dry cutting. MQL has been proven to be a superior mechanism with some benefits such as cost effective, worker safety, improved cooling performance, and improved system performance. MQL can be regarded as technology that connecting dry and conventional flood cooling. This study is aimed to discuss MQL including its development and its application in machining processes.
The Intervention of Participatory Ergonomics in Repetitive Truck Loading Improvement Activities for Mineral Water Product
Authors: Wahyuni Dini , Panjaitan Nismah , Budiman Irwan , Dora Manurung Elisa
Published: December 2020

This research was conducted at a bottled drinking water company located in Sumatera Utara, Indonesia. Workers loading gallon water bottles into trucks experiencing musculoskeletal complaints (MSDs). Rapid Upper Limb Assessment (RULA) and Job Strain Index (JSI) assessment of the work also shows high-risk work. Participatory ergonomics interventions were conducted to overcome these complaints through two stages of Focussed Group Discussion (FGD). The first stage of the FGD with the workers produced several inputs which became material in the second phase of the FGD with the management. In the second phase of the FGD, approval was obtained for the implementation of the repair solution for 20 working days (4 weeks), namely the provision of Occupational Safety and Health material, the application of gallon water bottle transfer operating procedures to the truck, and the application of Job Control by the supervisor. Every week, ergonomic interventions are evaluated and at the end of the fourth week, there are no complaints of extreme pain in all segments of the worker’s body.
Analysis of Human Factors and Workloads in Earthquake Disaster Evacuation Simulations Using Virtual Reality Technology
Authors: Sudiarno Adithya , Wahyuni P A Dwi
Published: December 2020

Natural disasters are disasters caused by a series of events caused by nature. An earthquake is an earthquake or event that shakes the earth caused by a collision between the earth’s plates, volcanic activity, or the collapse of rocks in a mining area. In a disaster situation, evacuation of knowledge or procedures is very important to optimize the chances of disaster survivors while trying to save themselves. How many migration efforts have been made, for example through direct simulations, as well as print media facilities such as disaster response books, videos, etc. One technology that can make a scenario as if real is virtual reality (VR). VR can be used as a technology when carrying out disaster evacuation simulations to avoid or reduce risk when conducting live simulations. In this study will calculate the workload when using simulations using the SIM-TLX method with several conditions, cybersickness symptoms felt by participants, usability, and immersive in simulation applications. This research was conducted on participants who are experts in disaster response and amateur participants. the results of this study can be seen that the workload does not affect in all five conditions, about 60.42% of participants experienced headaches due to the use of VR, the SUS score obtained was 68.39 out of 100 and a PQ score of 3.95 out of 5.00 which means above average.
Risk Modelling in Financial Feasibility Study for Caesalpinia sappan Natural Dyes Factory in Surakarta
Authors: Ronyastra I M , Sutrisna P D , Waluyo P W , Winadi A S , Priyantini H R
Published: December 2020

Emerging concern for sustainability issues in textile industry has increased the interest to use natural dye in the textile wet processing as it offers a solution for a non-polluting waste. One of the popular sources for natural dye is Caesalpinia sappan barks. However, the decision to build a factory specializing in producing natural dye powder from Caesalpinia sappan would expose several risks and it will need supporting data from a feasibility study especially from the financial aspect that consider the risks. This research aimed to construct a financial model that can be used to identify risk drivers and their impact on the financial result. The risk modelling was conducted using 3-points estimates with Monte Carlo simulation. This research found that the net present value (NPV) is at IDR 1.080.570.007 which is considered as feasible. There are three main risk drivers that have significant impact namely selling price, market share, and material cost. The Monte Carlo simulation from 100 iterations reveals that the mean and median for the NPV is at around IDR 900 million.