bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multi-criteria spine layout design of a mixed production line considering additional processes required for a new product
Authors: Arifiyanto Agus , Cakravastia A R Andi , Priyatna Iskandar Bermawi 
Published: December 2020

Abstract
This research is based on a case study of an automotive company with a mixed production line system facing on redesigning layout due to an additional new product in the current facilities for cost improvement. The objective of this research is twofold (i) to fulfil space required for additional machines and (ii) to redesign layout which is the best layout for producing the current and new products. Heuristic approach combining construction and improvement algorithms is used for redesigning a manufacturing mixed production line layout, and this results in four alternative layouts. The four alternative layouts are evaluated comprehensively by using MCDM (Multi Criteria Decision Making) and the multi criteria considered are material handling cost, total re-layout cost, takt time process, numbers of shutdown period for relocation and comply with management policy related with safety. The best layout is the layout fulfilling required space, 1,120 m2 for new processes, and meet with the five criteria considered.
Proposed Improvement of Flour Quality by using New Seven Tools Method (Case Study : XYZ Company)
Authors: Ginting Rosnani , Wibowo Christopher 
Published: December 2020

Abstract
The quality of flour is a matter that must be considered as the main output in the production process, in this case each type of flour has a different standard specification, the quality of the flour is determined by 3 main factors contained in the flour, namely moisture, protein and Ash content. The specifications of the three main factors must be achieved in order to produce quality flour and suitable for use according to the type of flour. Disruption in the production process can cause the quality of a flour not reached / not in accordance with the specifications, things that can cause disruption in the production process can be caused by several factors, namely the quality of raw materials, human factors, machine factors in the production process, work methods and work environment in the production process. So, this research was conducted using the new seven tools method to find out the main causes of quality problems in wheat flour and to find proposals to improve the quality of wheat flour. The application of this method suggests making a monitoring schedule because the main problem found in the field is not monitoring closely.
Improving the Loading and Unloading Process Efficiency with Lean Manufacturing Approach using Value Stream Mapping in Jakarta Container Yard
Authors: Fathurrahman K. , Hakim I. M. 
Published: December 2020

Abstract
Facilities and infrastructure of maritime logistics activities such as ports, vessels, and containers are important indicators for developing national export-import activities. Maritime Logistics activities in container terminals has a big problem of dwelling time while apparently there are also bigger problems in Container yards. This leads to process and time efficiency problem. Container utilization can be improved in the loading and unloading process at Container Terminals and Container Yards. The Loading and Unloading processes at container yards happen to be the longest duration of all logistics activities. Therefore, increased loading and unloading efficiency at container yards are needed as an effort to increase export-import activities. The study was conducted by observing the loading (lift-on) and unloading (lift-off) process flow to identify waste using the Value Stream Mapping (VSM) method. Waste of Waiting is identified both in Loading and Unloading processes. VSM design results in an increased level of efficiency up to 84.89% for the unloading process and 80.51% for the loading process. The VSM method is needed as waste identification and efficiency improvement efforts for container service in Jakarta container depot. The VSM method is needed as waste identification and efficiency improvement efforts for container service in Jakarta container yard.
Risk and reliability analysis on critical components of boiler in steam power plant
Authors: Pamungkas I , Irawan HT , Fitriadi  , Saputra A 
Published: December 2020

Abstract
This paper uses the failure mode and effect analysis (FMEA) approach to conduct a risk analysis, and the reliability approach to determine the level of reliability of critical components of boiler sections in steam power plants. The critical components of the boiler will be identified failure modes, causes of failures and effects of failures, and then assess the severity, occurrence and detection to get a risk priority number (RPN). The critical boiler component with the highest risk is calculated for reliability. The results of this paper show the highest risk found in the four critical components of the boiler, namely cyclone separators, primary air fan (PA fan), coal feeder, and induced draft fan (ID fan). While the reliability calculation results of the four components, the average reliability value obtained is below fifty percent, or including low. The results of risk and reliability analysis that recommend to minimize risk and improve the reliability of critical components in the boiler using diagnostic methods, conducting preventive controls, using visual management techniques, using sensors to distinguish failures, and carrying out preventive and scheduled maintenance to prevent unexpected outages in the generating system.
Analysis of Quality Level of Outpatients in Puskesmas Baktiya Using Fuzzy-Servqual Method (Service Quality)
Authors: Bakhtiar  , Zakaria Muhammad , Anshar Khairul , Wahyuni Fitri 
Published: December 2020

Abstract
Puskesmas Baktiya is a company engaged in central of public health service services related to the patient. Thus it is necessary to improve the quality of services provided so that customers feel comfortable and satisfied, and need a method to measure the quality of Pusksmas Baktiya. The data collection steps were conducted by observing and distributing questionnaires from several criteria. The criteria are obtained through interviews and literature study. The method used to measure the quality of service using Fuzzy-Servqual. The research instrument used questionnaires with a total sample of 40 respondents, ie outpatients Puskesmas Baktiya. The results of data processing, obtained that the value of fuzzy-servqual per criteria as a whol has a low value so that Puskesmas Baktiya needs to make improvements. It also shows that customer expectations are not yet in line with the perceptions of the services they receive. With these results the management of Puskesmas Baktiya need to immediately improve the quality of service to attract patients. Patient waiting time for service to doctor’s office (after registration) and patient waiting time for drug taking (after service in check room).
Effect of K-Silica heterogeneous catalyst in transesterification reaction of crude palm oil
Authors: Manurung Renita , Syahputri Zuhri Ruri Rizki , Siregar Halimahtussa’diah , Agustan Siregar Alwi Gery 
Published: December 2020

Abstract
Crude Palm Oil (CPO) is a raw material form of vegetable oil that cannot be consumed anymore and where the availability is very large. The purpose of this study was to observe the use of crude palm oil in the manufacturing of biodiesel by using a catalyst of bamboo ash leaves catalyst impregnated with KOH to get in the best yield of various reaction variables performed. The transesterification process reacted oil and methanol to produce methyl esters and glycerol. The methyl ester was produced at the top layer and it was separated from the glycerol and then washed. The effects of various process variables such as the type of the catalyst, the amount of catalyst, and time of reaction were observed in this experiment. The properties of biodiesel such as ester content, density, and kinematic viscosity, were evaluated and compared with Standard Nasional Indonesia (SNI). Under the best conditions, the maximum yield of biodiesel was 92.58% and 99.76% FAME methyl ester was 99.76% obtained using a molar ratio of oil: methanol of 1: 9 at 65°C with a reaction time of 2 hours and 4% catalyst. The results obtained in this study indicated that the K-Silica catalyst of KOH impregnated ash bamboo leaves is suitable as a catalyst to produce biodiesel.
Silica-loaded styrene-butadiene rubber in the incorporation of stearamide: The torque properties
Authors: Dhoni R , Ginting M , Surya I 
Published: December 2020

Abstract
This research-study investigated the effects of stearamide on the torque properties of silica-loaded styrene-butadiene rubber (SBR). The SBR was loaded with silica at a settled dose (thirty phr) and the stearamide was mixed into the silica-loaded SBR compounds with varied doses from two to eight phr. The effects of stearamide additions on the maximal torque, minimal torque and torque change of silica-loaded SBR were investigated. It was observed that the stearamide caused some affection in torque properties of the silica-loaded SBR. The stearamide diminished the minimal torque but raised the maximal torque and torque change. The bigger the stearamide doses caused in the lower was the minimal torque but caused in the higher was the torque change. The enhancement in torque was attributed to the role of stearamide as the supplementary plasticizing agent for the silica-loaded SBR compounds. The oily property of stearamide decreased the viscosity and enhanced rubber to filler interaction or crosslinks level, respectively.
Ergonomic Research Trends in the Health
Authors: Panjaitan N , Ali A Y B , Samat H A 
Published: December 2020

Abstract
The Ministry of Health (Kemenkes) in March 2019 released the number of hospitals in Indonesia, the number of hospitals released is 2813, the province with the highest number of hospitals in East Java and followed by West Java in the 2nd rank. The number of hospitals approaching the number 3000 indicates that there is an increasing number of patients each year, with the number of hospitals increasing each year, so hospital management is a very important factor for attention in improving hospital management especially in the area of ergonomics. Ergonomic research over the last 10 years has been in the health field of 62. The research includes macros ergonomics, meso ergonomics and micro ergonomics. Meso research ergonomics with the least amount of just 1 study in the last 10 years, 31 macro studies ergonomics and 30 micro-ergonomic studies. Ergonomic research in most health fields was conducted in 2015. The number of hospitals steadily increasing over the years should be followed by an increasing number of studies ergonomics in the field of health especially in hospitals.
Measuring the Situational Awareness when Driving on Online Motorcycle Taxi Drivers in an Efforts to Reduce Work Accidents Using the QUASA Method
Authors: Buchari  , Lawrena Sianturi Dian 
Published: December 2020

Abstract
The increasing demand for online motorcycle taxi services has been followed by an increase in traffic accidents. According to data from the Indonesian National Police, an average of 3 people die every hour due to traffic accidents and 61% of these accidents are caused by human factors such as the ability and character of the driver. Seeing the many cases that have occurred, in this study it is necessary to analyze the level of alertness of online motorcycle taxi riders with the aim of knowing the level of alertness of online motorcycle taxi riders so as to reduce the accident rate using the Quantitative Analysis Of Situational Awareness (QUASA) method. The results showed that the characteristics of online motorcycle taxi drivers are over confident. Based on the calculation, the level of alertness is 34.94%, the hit rate value is 0.617 and the false alarm rate is 0.498, the sensitivity value of 0.29 and the bias value of -0.135. The conclusion is that online Grab motorcycle taxi drivers tend to be less alert and overly confident so that they endanger themselves, their passengers and road users.
Reducing waste to improve product quality in the wooden pallet production processby using lean six sigma approach in PT. XYZ
Authors: Ishak Aulia , Siregar Khawarita , Ginting Rosnani , Gustia Dinda 
Published: December 2020

Abstract
This company is a company engaged in wood processing. The product produced by this company is wooden pallets. The problems that are found by this company is waste in the production process that are the high defective producs and non value added activities The average disability percentage of wood pallets is 7.52% of the total production per month. The value exceeds the disability tolerance of the company that is 5%. This study proposes to reduce the number of defective products and eliminates non value added activities through design improvement. This problem can be solved by using Lean Six Sigma approach which is a combination of the Lean and the Six Sigma concept with the DMAIC method by providing improvements to increase the number of defective products and eliminate non value added activities. By using the Lean Six Sigma method can provide lean metrics and sigma level calculation values. Based on actual study, the result for the lead time is 212.58 minutes, the process cycle efficiency is 64.40%, the process velocityis 0.0041 processes / hour. Based repair 70.73%, process velocityis 0.0035 processes / hour.
Bolt Product Quality Control Using Six Sigma DMAIC Method (Case study: PT XYZ Company)
Authors: Ishak Aulia , Elizabeth Zalukhu Nitra 
Published: December 2020

Abstract
The main purpose of quality control is to increase customer satisfaction. PT XYZ is one of the companies engaged in manufacturing by producing bolt product. In terms of quality control, the company is still getting products that increase customer satisfaction and exceed the company’s limits with a defect rate of 13.72%. From the analysis using the DMAIC and FMEA methods, there are 2 (two) dominant types of CTQ bolt products, namely screw defects and bolt head defects. The factors that cause Bolt product damage are: The company’s DPMO value is 45,744 and the c value is 3.19, which means that it is still far from the industry level in the world which reaches 6 c (3.4 DPMO). The company’s highest Risk Priority Number (RPN) is 265 which is caused by a less than optimal engine condition (dirty dies, shifted dies, and worn dies). Proposals to improve the quality of bolt products using the Six Sigma and FMEA methods for the company, namely check the condition of the machine, and make sure the dies engine is in a proper condition to operate.
Application of Fuzzy C-Means in Level Clustering of Traffic Accident Vulnerability
Authors: Syahputri K , Sari R M , Rizkya I , Farhan T A , Syardhi O C 
Published: December 2020

Abstract
Traffic accidents are a serious problem and need the right handling. The high level of traffic accidents is a problem often happened in big cities, especially in the Medan city. Data on traffic accident of 2018 are obtained from the Medan Police Station Unit and from the official website of Badan Pusat Statistika recorded of 1393 traffic accidents with 254 deaths, 721 seriously injured, and 985 slightly injured. Then this data grouped based on the accident road segment and culestered level of vulnerability using the Fuzzy C-Means Algorithm. The results of the Fuzzy C-Means algorithm are 13 road segments in vulnerable clusters, 36 road segments in quite vulnerable clusters and 53 road segments in safe clusters. Road segments in vulnerable clusters are marked in red, quite vulnerable clusters are marked in yellow and safe culsters are in green. Data validation obtained by the traffic accident vulnerability clustered by classifying traffic accident data in the first two months of 2019 using the same method, namely the Fuzzy C-Means Algorithm, the conformity level of the Fuzzy C-Means resulted of 78,75%.
Planning of Master Production Schedule at PT Semen Padang
Authors: Ishak Aulia , Tarigan Ukurta , Dwinitha A 
Published: December 2020

Abstract
PT. Semen Padang is a company that produces cement. In producing cement, of course we need a master production schedule to plan and produce outputs related to quantity and time periods. In other words, the master production schedule is a plan that identifies the quantity of certain items made by a company. The subject studied in this case was PT Semen Padang, where PT Semen Padang has not used precise calculations based on the rules and formulas for making a master production schedule so that the production department does not have a reference in conducting the cement production process. In this research, what will be done is making the master production schedule for 2017 using historical data three years earlier. From observations made precisely in the Production Planning and Evaluation (PEP) section, that the company’s production planning is good enough. Every day the company always takes stock data from every factory in Indarung, starting from Indarung II / III, Indarung IV, V, and Indarung VI. The method used by the company is a calculation based on historical data taken every day, and with estimates based on stock data taken every day.
Determining the Number of Optimum Servers in The XYZ Restaurant Queue System with Queuing Theory
Authors: Siregar Khawarita , Ishak Aulia , Fernando  
Published: December 2020

Abstract
Queue is a natural phenomenon that occurs when the demand for a service at a certain time exceeds the capacity of service at the same time. In this paper, the problem is solved using the queuing theory which is an analytical tool that is very helpful in solving queuing problems. This theory includes mathematical studies that produce important information needed in decision making with the help of forecasting various characteristics of the queue line. The queuing model in this restaurant queue system is (M / G / S). The current queuing system has System utility level (p) 52.23%, average time of customers in the queue (Wq) 0.4634 minute, The average time a customer in a system (W) 2.8074 minutes, Average Number of Visitors in the Queue (Lq) = 0.2104 ≈ 1 person, and Average Number of Visitors in the System (Ls) 1.2750 ≈ 1 person. The total waiting time on server 2 is below the maximum waiting time of 15 minutes and has the greatest system utility level, thus the optimum number of servers chosen is server 2 which is already optimum.
Decision Support System of Family Karaoke Selection with Analytical Hierarchy Process Method using Super Decisions Software
Authors: Ishak Aulia , Siregar Khawarita , Putri Radiansyah Latifa 
Published: December 2020

Abstract
The rise of new and qualified karaoke venues is a place that many people often visit. In this journal, the family karaoke to be analyzed for comparison is K2 family Karaoke, NAV family karaoke, and Milo Family Karaoke. In the process of data processing, the method used is the method of Analytical Hierarchy Process (AHP) with Super Decisions Software. Based on the priority weight calculation for the service attribute where the karaoke is obtained that the reliability element is the highest value element of 0.35580. Furthermore, based on the weighted result of level 3 priority is found that the conformity element of the payment system offered has the highest value of the other element of 0.19973. Based on level 4 priority weighting results are obtained that the weight value for NAV Karaoke is the highest value of the other family karaoke is 0.61197.
Influences of Modified Palm Stearin on Vulcanization Properties of Carbon Black-Loaded Epoxidized Natural Rubber
Authors: Philbert  , Surya I 
Published: December 2020

Abstract
The present research-study investigated the influences of modified palm stearin (MPS) on the vulcanization properties of carbon black (CB)-loaded Epoxidized Natural Rubber with 25% mole (ENR 25). The ENR 25 was loaded by CB at a fixed loading (thirty phr) and the MPS was added into the CB-loaded ENR 25 compounds with varied doses from one to seven phr. The influences of MPS additions on the optimum vulcanization and scorch times and also cure rate index (CRI) of CB-loaded ENR 25 were investigated. It was observed that the MPS caused an enhancement in the rate of the vulcanization process on the ENR 25 compounds. The MPS decreased both the times to scorch and optimum vulcanization time but increased the CRI. The bigger the MPS doses caused in the lower were the scorch and optimum vulcanization times but caused in the higher was the CRI. The enhancement in CRI was attributed to the role of MPS as the supplementary accelerator for the CB-loaded ENR 25 compounds. The amine content of MPS enhanced the CRI.
Moringa Leaves (Moringa Oleifera) Potential as Green Catalyst for Biodiesel Production
Authors: Taslim  , Irawan Ferry , Iriany  
Published: December 2020

Abstract
Moringa plant’s value can be improved by utilizing the leaves as green catalyst. This research aimed to examine moringa leaves as green catalyst for transesterification of coconut oil to produce biodiesel. Dry moringa leaf powder was calcined for 3 hours at 500°C to make moringa leaf ash. Moringa leaf ash was characterized by using Scanning Electron Microscopy - Energy Dispersive X-Ray Spectroscopy (SEM-EDX). The analysis result showed that moringa leaf ash contains metal oxide such as potassium oxide (K2O) and calcium oxide (CaO) which act as catalyst in biodiesel production. Transesterification was carried out with coconut oil to methanol molar ratio of 1 : 9 and catalyst loading of 2% by weight. The variables observed in this study were the effect of reaction temperature and time on biodiesel yield. The best yield obtained was 98.18% at 60°C and reaction time of 150 minutes. These results confirmed that moringa leaf ash can be utilized as green catalyst for synthesizing biodiesel.
Branch and Bound Method to Overcome Delay Delivery Order in Flow Shop Scheduling Problem
Authors: Najilatil Mazda Chadziqatun , Agustina Kurniawati Dwi 
Published: December 2020

Abstract
Leather industry is one of the industrial sector in Indonesia. Leathercraft industry is one of the industrial sector which concerning to improve the national economic growth of Indonesia. PT Mandiri Jogja International (PT M. Joint) has a problem in late completion production time which caused delay delivery order. So that this company need an evaluation on job scheduling production system which have a smallest total completion production time (makespan). This research is to make a new sequencing scheduling using Branch and Bound method, which has the smallest total completion production time (makespan). Branch and bound is one of the algorithm used to make a new sequencing scheduling. The results showed that scheduling with the actual method applied in the company by sequencing 4-3-5-1-2 has makespan score 13630.68 seconds or 3.79 hours. The scheduling using Branch and Bound method by sequencing 2-1-3-4-5 and 2-1-4-3-5 have a makespan score 12954.46 seconds or 3.60 hours. Branch and Bound method has a makespan 0.19 hours small than actually method at the company. Therefore, branch and bound method is used to make a new sequencing scheduling to overcome delay delivery order at PT M. Joint Exclusive Leathercraft.
Spur Gear Failure Detection using Support Vector Machine
Authors: Siregar Richard , Isranuri Ikhwansyah , Suherman  
Published: December 2020

Abstract
Torsional vibration generated by the spur gear as result the imperfection may generate geometrical error that can lead to spur failure. In order to prevent error propagation, preventive maintenance by detecting and analyzing vibration should be performed. Existing work has been dealt with torsional vibration detection either using tools and/or employing intelligent system. This paper proposed evaluation prototype with support vector machine to differentiate normal and broken spur gears. The assessment results show that gear states were easily determined by using some features. The accuracy achieves 100% in several trials with average accuracy 99.35%.