bluuebunny/crossref_metadata_2025_split huggingface dataset:
Minimizing damage of product using six sigma and triz methods
Authors: Boangmanalu Ervi , Abigail Triposa , Sembiring Anita , Tampubolon Jusra 
Published: June 2020

Abstract
Quality control of a product must be considered by all manufacturing companies to maintain product quality. One of the manufacturers of solid drug makers in the city of Medan has problems in the process of packaging/stripping. In the stripping process, there are four types of defects in X solid medicinal products that are leaky / deflated, the packaging is bad, not filled, and in the packaging, the contents are broken. To minimize defective products researchers used the Six Sigma and TRIZ methods. This study aims to determine the value of Defects Per Million Opportunities (DPMO) and sigma level and identify the risk of failure that occurs with the Failure Mode and Effects Analysis method (FMEA) and the Theory of Inventive Problem Solving (TRIZ) method as problem solvers. The result of the value of sigma level before improvement around 3.61 with the possibility of defects approximately 16981 for a million processes. Then, after improving the sigma value to 4.06 with the possibility of a process failure of 1547. The proposed improvements are training or socialization, carry out routine machine maintenance and to give the warning to monitor the performance of each operator.
Hazard identification of repetitive truck loading activities in mineral water industry
Authors: Wahyuni Dini , Panjaitan Nismah , Budiman Irwan , Dora Manurung Elisa 
Published: June 2020

Abstract
A good work system is one of the most important factors in the company’s progress, and is the main key to success to increase productivity, company efficiency, and reduce the risk of injury. This research was carried out in a mineral water industry located in North Sumatra. The activity of loading the product to be distributed includes lifting the gallon from the conveyor to the truck. The problem faced by the company was the lack of supervision of the appointment activities, workers complained about the muscles and skeletons due to the Manual Material Handling (MMH), and because workers were also assigned to other work stations. Complaints were identified using the Standard Nordic Questionnaire, Job Strain Index, and Rapid Upper Limb Assessment. The SNQ results show that before doing work in several parts of the body it does not feel sick, but after doing the activity arises a complaint is very sick. This shows that lifting activities are the cause of complaints. The JSI score shows an index value of 12, which means that the activity enters a hazardous job. The results of the RULA score indicate that there must be action now too. To solve this problem, Participatory Ergonomics intervention methods were carried out. PE intervention is carried out on workers who aim to get input on remedial solutions needed by workers and to management for the implementation of selected solutions.
Human error assessment in batik enterprises located in North Sumatera using HEART method
Authors: Wahyuni Dini , Theresa Sinaga Lamria , Budiman Irwan 
Published: June 2020

Abstract
Industry of batik has been growing since The United Nations Educational, Scientific and Cultural Organization (UNESCO) established the Indonesian batik as a world cultural heritage on October 2, 2009. Batik’s business began to develop in Java and extended to Sumatra, especially North Sumatra. North Sumatra’s Batik comes with a variety of distinctive ethnic motifs which appear attractive with ornamental motifs from various tribes in Sumatera Utara. In order to improve that industrial excellence, North Sumatra batik SMEs are required to further improve the performance, one of them through the supply chain management which are owned. The role of humans in the supply chain of the batik industry tends to be dominant, due to their role as producers, workers, and consumers. Errors caused by humans that have been found in the North Sumatra’s batik industry, such as design or color mistakes that are not in accordance with the wishes of the customer. This study aims to identify human error in the supply chain of North Sumatra batik SMEs in Medan City by adopting the Supply Chain Operations Reference (SCOR) model, namely plan, source, make, deliver, and return. The data processing was conducted by HEART (Human Error Assessment and Reduction Technique) method. The contribution of this paper is to demonstrate the use of HEART method to analyze human error in North Sumatera’s batik industry. The results of the study showed that the highest human error probability is in the process of batik motif design, cutting fabric, dyeing motif, dyeing cloth, and release wax from cloth.
Analysis of production line balancing using genetic algorithms
Authors: Ginting Rosnani , Vito Bayu Aji Indi Benedictus , Fauzi Malik Alfin 
Published: June 2020

Abstract
XYZ company has a problem on the production line that is the build up of work stations and bottlenecks that indicate an imbalance. The aim is to solve the problem of balancing the production line at the company. The production line using the Genetic Algorithm method is done by determining objective parameters and functions, making the encoding of the work station, determining the initial initialization according to the actual production path, then doing iteration with selection, crossover, and mutation to form a new population, and ending with the termination of the algorithm. The results of the actual production line obtained are the number of work stations as many as 8 work stations and with the largest cycle time of 2213 seconds. The genetic algorithm production trajectory is obtained after achieving the maximum objective function value or until the maximum iteration limit is reached and consists of 7 work stations with the largest cycle time of 2203 seconds, and has a higher efficiency value thereby minimizing idle time, having a higher value of balance delay low so that it shows a decrease in waiting time and a lower value of the smoothing index compared to the actual production line where the production line is more balanced, meaning that the division of work elements is quite evenly distributed on the assembly line.
Balancing the production line using the ergonomic approach
Authors: Ginting Rosnani , Khatami Muhammad , Fauzi Malik Alfin 
Published: June 2020

Abstract
Track balance is a process of balancing production lines at a series of work stations (machinery and equipment) that need to be carried out in the product manufacturing process. This aims of this research is to form and balance the work risks allocated to each work station. If the track balance is not carried out it can lead to inefficiencies and reduce the level of flexibility of the production floor. Job Rotation (JR) is a method for designing jobs where staff learn work skills from various parts and by making changes to tasks, fatigue resulting from repetitive work tasks will be eliminated. In principle, the Region Approach method seeks to charge first to operations that have a large preliminary responsibility. Through the research conducted, the optimum trajectory is obtained using the region approach and job rotation methods where the method can produce optimum work center and can reduce the risk of excessive work. Region approach trajectory, as many as 7 work stations. In addition, the efficiency of the production line where there is an increase in efficiency of 10.56% in the region approach trajectory. Then the balance delay decreased by 10.07% in the region approach trajectory, and a decrease in the smoothing index by 298.90 in the region approach trajectory. Based on the results of the calculation of work risk using the RULA method, the results of the calculation of work risk on the work elements of each work center where the results obtained by the reduction of work elements and the addition of work elements are carried out so that the work risks at each work center are balanced, and can reduce injuries when work. Production line on the proposed condition with a cycle time of 2304 seconds and there are 7 work stations. The known value of balance delay is 18.62%, efficiency is 81.76% and smoothing index is 2015.74.
A design of bi-objective optimization model palm refinery export supply chain network: a case study in Indonesia
Authors: Tryana Sembiring Meilita , Sejati Hutapea Saut , Zaky Hadi M , Wahyuni Dini 
Published: June 2020

Abstract
One of the important elements influencing the export development of these products is the export distribution network produced by refining palm oil. The challenge of export distribution of palm oil refining products to generate maximum profit with minimum distribution costs, among others, is high transportation costs, distant transportation / logistics destinations, variations in product types and allocation of the number of products that must be distributed to consumers (foreign markets). The purpose of this study is to maximize profits and minimize distribution costs from the export distribution network of Indonesian palm oil refining products. Multiple goal optimization model (multi objective optimization) with the completion of soft-computing techniques is needed to solve this problem in order to get optimum results with a short solution search time. The NSGA-II algorithm (non dominated sorting algorithm II) was chosen in the completion of the existing optimization model because of the characteristics of the distribution network of export products resulting from complex refining of palm oil. The scenario used for testing the optimization model is by using a system entity consisting of three types of Indonesian palm oil refining products (Stearin RBD, Olein and PFAD RBD).
Determination of criteria and sub-criteria for selection of spare parts raw material supplier using the Delphi method
Authors: Ishak Aulia , Wijaya Tommy 
Published: June 2020

Abstract
Spare parts are goods that consist of several components that form a single unit and have certain functions. The development of the number of motorized vehicles in Indonesia from 2012-2017 has always increased, with a growth rate of 31.88%. The selection of the right supplier is not only profitable for the company but also can increase customer satisfaction. Therefore in the selection of suppliers the company must have a system of selection and evaluation of suppliers of raw materials and components. This research was carried out on car spare parts production companies with raw materials in the form of rubber. This study aims to obtain criteria and subcriteria in selecting suppliers of spare parts raw materials by using Delphi Method. The results of the Delphi Method obtained 9 supplier selection criteria, namely: Quality, Delivery, Guarantee and Complaint Service, Price, Manufacturing Capability, Quality Management System, Documentation and Self Audit, Development Design Capability, and Cost Reduction. Based on the 9 criteria obtained 55 sub-criteria that can be used by companies in selecting suppliers of spare parts raw materials.
Reliability investigation of steam turbine critical components
Authors: Sabri M , Immanuel Sibarani Adven , Sabri Faris A M , Geubrina H S 
Published: June 2020

Abstract
Several aspects of maintaining and operating steam turbines at the palm oil mill areas have historically resulted in unreliable performance and repetitive failures. The reliability analysis using Weibull probability distribution for various components of steam turbine is discussed extensively. The objective of this reliability assessment is to identify the potential failure path of steam turbine components. The intent herein is to focus on critical components of steam turbine to successfully improve the integrity and reliability of turbines in those components. Areas discussed will be bearing failures, Shaft Seal failures, Control/stop Valve, Main Oil Pump, and Reducing Gear. It is necessary to improve the reliability indices of the steam turbine components by taking some measures such as well-planned and routine maintenance of equipment’s as well as training and retraining of technical human resources of the major equipment like steam turbine.
The comparative analysis of solar desalination with cooling glass
Authors: Ambarita H , Nababan J P , William  
Published: June 2020

Abstract
Fresh water plays a role and is responsible for life. The need for fresh water continues to increase due to its use in various fields of life, such as agriculture, industry and population. To prevent water shortages, it is very important to show the gap between the demand and supply of drinking water by developing water purification technology. Solar power / solar energy (renewable energy sources) in the form of distillation is one of the most promising, simple, and economical technologies for the purification of salt and brackish water. double slope passive system with the addition of water-cooled glass outside with water diluted by a solar-powered DC pump from photovoltaics with no outer glass cooler.
Automated pneumatic vacuum suction robotic arm with computer vision
Authors: Lim J , Yang P , Yuanda P , Bakkara R V , Sinaga M , Siagian H , Suryanto E D , Perangin-angin D 
Published: June 2020

Abstract
In this paper, a 4 DOF robotic arm that made of acrylic was built and equipped with a 5 MP USB camera, a pneumatic vacuum suction cup and a small air pump. An image will be captured by the camera and then processed with computer vision algorithms. The algorithm will extract the coordinate from the object image. The extracted coordinate data from test objects then fed to the microcontroller. Pulses were generated by the microcontroller to the driver module to control the motors. Some parameters were changed and adjusted accordingly to achieve a different result for analysis purpose. Objects that are used in this research are boxes with various shapes, colors, surface sizes, and weight. The result, the robot was able to reach the object within 2 mm to 4 mm tolerance. Image processing algorithm centroid calculation errors are within 2 mm. Vacuum pickup success rate is 99%.
Engineering education system between Indonesian Vocational School and Japanese KOSEN
Authors: Siswanto A P , Budiyono  , Kasai H , Fujiwara S , Mizuno Y 
Published: June 2020

Abstract
International partnership has become an emerging issue in which due to globalization goals, the needs of having collaboration between countries are inevitable. Cross-continents collaborations are encouraged; however, having partners with similar cultural background is seen more beneficial. This article aims to review challenges on programme development of Vocational Education between Indonesian and Japan. Vocational Education in Indonesia has been well established for decades where students are trained in 3-year education of Vocational High School then continue to 3-year education of Vocational School at the University. Curriculum is set to be more giving practical training which can enhance skills of students in problem solving. Moreover, KOSEN is one of distinctive education systems in Japan which is an abbreviation of Japanese form “koku-ritsu-kou-gyou-KOU-tou-SEN-mon-gak-kou” which is translated as National Institute of Technology. It offers 5-year education after Junior High School which provides training and skills development for students. Programme development of KOSEN and Indonesian Vocational Education are seen to be feasible for being implemented further which can deliver more skilful graduates. Combination of skills and cultural side of graduates are expected to be positively influencing their working ethics. Comprehensive capability of graduates is linear to their competency which also increases their employability.
Implementation of bandwitdh management using microtic router
Authors: Widia I D M 
Published: June 2020

Abstract
Computer network is a group of computers that are interconnected between one another and use communication protocols through communication media so that can share and exchange information. In a network technology required a device that can perform management between existing networks. These devices are called routers. The use of internet connection together on Local Area Network requires the existence of gateway and router. Microtic OS is a reliable operating system to operate as a gateway and router. Bandwidth management is required to share the bandwidth capacity available in the network appropriately for each client and application. The clients are expected to get the optimal bandwidth capacity as needed. This makes it easier for network administrators to monitor internet access in each part, because the bandwidth management has been done.
Numerical Investigation on Critical Velocity of Ice Slurry Flow
Authors: Rawat K.S. , Verma A. , Pratihar A.K. , Singh A.K. , Maheshwari P. 
Published: June 2020

Abstract
The use of ice slurry as a working fluid in secondary-loop of refrigeration system not only enhances the system performance but also reduces the refrigerant charge and its leakage to environment. It can be transported through pipes; however, flow of ice slurry is a quite complex two phase flow, which significantly differs from conventional fluid flow. Ice slurry flow can be influenced by on several operating parameter viz. initial velocity, ice concentration, freezing point depressant concentration and particle size. Solution of such type of flow through pipe is a difficult task through experiments due to complexities in visualization and measurements. Therefore, a CFD model is developed to simulate the ice slurry flow to predict the safe conditions for the transportation of ice slurry. In the present work, numerical investigation of flow of ice slurry has been analyzed in order to predict the critical velocity and effect of different parameters on critical velocity. Eulerian granular flow model has been used for the simulation, which is also validated with existing experimental results in the literature. Result shows that, the critical velocity is especially influenced by the particle size. Critical velocity at 10 % initial ice concentration increases from 0.4 m/s to 0.16 m/s with increase in particle size from 0.1 mm to 0.4 mm.
Comparative Study for Thermal and Fluid Flow Peculiarities in Cascading Spiral Inner Tube Heat Exchanger with or without Diverse Inserts over Spiral Tube
Authors: Kaushik Shivasheesh , Singh Satyendra , Kanojia Nikhil , Rawat Kuldeep , Panwar Kuldeep 
Published: June 2020

Abstract
Present work deals with experimental analysis in which various observation takes place related to performance characteristics like HTR, effectiveness and fluid flow peculiarities like Nu, Re, f, NTU, TPF etc in a cascaded spiral concentric tube type heat exchanger consisting of a GI shell and a cascaded spiral copper inner tube having conical shape inserts, hemispherical insert and plane profile unit for parallel flow. Five spiral cascades with three turns in each are used for the inner side copper tube unit. Water enters at 304°K from the innermost turn along the cascaded spiral tube, and leaves at the outermost turn. The hot fluid inlet for heat exchanger is from bottom of one end of the shell at 333°K, flowing radically across the cascades, and then leaving the exchanger from the top of another end. This paper based on comparative experimental study of the behavior of such system for parallel flow with different shape of inserts, and then compared with the simulation results for same. In this analysis comparative approach is considered for evaluating optimum fluid flow and thermal properties on the basis of geometrical parameters. The results predicted that out of three profiles of insert, plain, conical and half cut elliptical profile, which located over inner copper tube of exchanger, half cut elliptical profile insert shows best results on fluid flow and thermal peculiarities, for mass flow rate range 0.012 to 0.049 Kg/s and Reynolds number range 4236 to 18540, heat transfer rate varies from 1128.06 to 2374.77, Nusselt number varies from 75.15 to 144.05, Friction factor varies from 0.00376 to 0.00305 and effectiveness varies from 0.77 to 0.40 and Number of transfer unit varies from 2.08 to 0.68 for half cut elliptical profile.
Influence of Friction Stir Welding Parameters on Mechanical Properties of dissimilar AA 7475 to AISI 304
Authors: Goel Pankul , Saxena Ankit Kumar , Wahid Mohd Atif , Rathore Sachin , Sharma Nidhi , Kant Mishra Radha 
Published: June 2020

Abstract
Joining of dissimilar materials is difficult and challenging. Trend towards replacement of high density material (HDM) by low density material (LDM) is gaining importance in automotive industries. In the present work, friction stir welding (FSW) of high strength dissimilar materials i.e. aluminium alloy AA7475-T761 and stainless steel AISI 304 was conducted. The mechanical properties and microstructure of butt joint were investigated on using Taguchi L8 orthogonal array (OA). Different combinations of FSW parameters were used to obtain the maximum value of UTS. It was observed that most dominating parameter affecting UTS is tool rotational speed, contributing 42.19%, followed by traverse speed with 38.96% and shoulder diameter with 12.60%. The maximum UTS was observed 75.22% of base material AA 7475 (452MPa) under the optimum combination of parameters; tool rotational speed at 450 rpm, traverse speed 63 mm/min and shoulder diameter 14 mm. The microstructure of the resulted efficient joint shows appreciable variation in grain sizes in different zones and the micro hardness was found maximum in SZ on the retreating side.
Green Synthesis, characterization of Zinc oxide nanoparticles using Chromolaena odorata extract and evaluation of its properties for photoanode of solar cells
Authors: Balogun SW , Sanusi YK , Agboluaje BA 
Published: June 2020

Abstract
Synthesis of Zinc oxide nanoparticles (ZnONPs) using plant extract was carried out in this work because of its advantages over other method of synthesis namely; simplicity, environmental friendliness and elimination of toxic chemicals. Fresh Siam leaf extract was characterized over a period of 10 days to study the effect of time on the optical photon energy absorption properties. ZnONPs was synthesized and deposited on substrate by spin-coating method and characterized by UV-vis spectroscopy, Fourier transform infra-red spectroscopy, Scanning Electron microscopy, and Energy Dispersive X-ray. ZnONPs thin film device was then fabricated to study the electrical properties. From UV-vis spectroscopic result, as the time (day) increased, there was an increase in the value of the transmittance and corresponding reduction in photon energy absorption. FTIR result gives the functional groups and absorption number at 3448.04cm−1 O-H single bond, 2524.85cm−1 C-H bond, 1437.15 cm−1, 880.59 cm−1, 729.06 cm−1, 433.44 cm−1 Zn-OH and Zn-O variety of single bond. The surface morphology shows large grain size. Energy band gap of ZnONPs was approximately 3.7 eV. The fabricated ZnONPs thin film device under illumination has efficiency of 2.010/0. From the morphology, optical, and electrical properties of the ZnONPs thin film and device, it could be a suitable material for crystalline solar cells as photoanode.