bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the Potential of Crust Formation and Corrosiveness in the Way Rilau PDAM Lampung Distribution Network Using the Langelier Saturation Index Method
Authors: Anwar  , Sembiring Alexander , Purna Irawan Agustinus 
Published: July 2020

Abstract
Crust formation is a complex problem and always occurs in piping systems, both in oil piping systems, industry, and water distribution. When the crust is formed on the pipe, it will cause the pipe diameter to shrink and inhibit the flow of fluid in the pipe system. If the pipe has a problem, its temperature and pressure will be higher, increasing the possibility of the pipe to break and get damaged. This study aims to determine the formation of PDAM water pipe scale in Bandar Lampung with the Langelier Saturation Index Method. Based on the LSI calculation results, a value of -0.9 is obtained. This indicates that the corrosion rate is high, but there is no visible potential for scale formation. Formation of corrosion in the pipe can cause the pipe wall to thin out thereby increasing the potential for pipe leakage. Due to this, the checking of the pipes is necessary. Potential leakage of pipes will disrupt the distribution system and reduce service levels of PDAM Bandar Lampung City. Increasing the value of LSI in water can increase the pH of each water source. Increasing the pH will cause an increase in the value of LSI so that it is in neutral conditions and the level of corrosivity decreases. In addition, the flow velocity of water needs to be maintained with a minimum speed of 0.3 m/s to prevent the formation of scale on the pipes.
Image clustering using genetic algorithm with tournament selection and uniform crossover
Authors: Valerian Gevin , Sutrisno Tri , Erny Herwindiati Dyah 
Published: July 2020

Abstract
This study aims to test genetic algorithm with tournament selection and uniform crossover for clustering complicated images. Genetic algorithm can be used for searching the optimum centroid for clustering images. Images that used in this study is beach images, city images, traditional market images, and garden images. Based on the research result genetic algorithm with tournament selection and uniform crossover can be used for clustering images but there is some outlier in formed cluster. Based on trial the best parameters for image clustering with genetic algorithm with tournament selection and uniform crossover is population=200, iteration=200, and number of cluster=2. Fitness value on genetic algorithm is increase when population and iteration value are higher. The result of this study can be used as a reference in the development of images clustering.
Project Manager Classification for Design and Build Construction of State Buildings
Authors: Kusumawati Jujuk , Mochtar Krishna , Najid  
Published: July 2020

Abstract
This study aims to obtain an appropriate classification of Project Manager (PM) experts for the Construction Design and Build of State Buildings. Where the criteria are taken from the tender for the Construction Design and Build project of the State Building using multi-criteria analysis, by conducting an expert interview, namely to the Construction Management Consultant and Committing Officer (PPK). Based on research using indicators of education, experience, certification, behavior and culture. the results obtained are appropriate Project Manager qualification criteria for the Design and Construction of State Buildings.
Identification of Design And Build Risks in School Building Construction Projects in Central Jakarta
Authors: Suharyanto Andreas , Simanjuntak Manlian Ronald A. 
Published: July 2020

Abstract
The increase in school building construction projects using design and build methods is the background of this research. Construction projects with design and build also have the same risks as school building construction projects with other methods. This research has the formulation of the problem in the form of how the character of school building construction projects in Central Jakarta and what are the risks of design and build in school building construction projects in Central Jakarta. The risks obtained are used as data to make improvements or prevention in the implementation of construction activities. Based on the results of the study there are 23 risk variables which are divided into 2 risk factors, namely planning factors and construction factors. The results of this study can be used as a reference in risk mitigation planning.
Flexible Pavement Mechanistic Response to the 2017 Indonesian Road Pavement Manual with Cement-Treated Base (CTB)
Authors: Noor Tajudin Anissa , Grady Akira Winarko Clement 
Published: July 2020

Abstract
The empirical method, a method developed from experiments or experience, has historically been the usual planning method used in Indonesia for designing flexible pavement thickness. The newest pavement design manual in Indonesia, Bina Marga 04/SE/Db/2017 has introduced the mechanistic method, based on pavement responses such as strain, deflection, and stress. Research was conducted to evaluate the design chart in the manual with KENPAVE program assistance in order to know the mechanistic response for the cement-treated base (CTB) foundation. The loadings for 100%, 150%, and 200% are used to know pavement response to loading variations. Vertical and horizontal strain were reviewed as mechanistic responses. Vertical strain was used to analyse rutting, and horizontal strain was used to analyse fatigue. The research shows that as the California Bearing Ratio (CBR) value increases, the smaller the vertical strain value becomes. However, this was not the case with horizontal strain where the CBR value did not seem to influence the horizontal strain value. The added loading will increase pressure on the pavement so that compressive and tensile strains on the pavement will be higher.
Passenger satisfaction assessment on the flight performance of Balikpapan-Yogyakarta route flights (Case study: Sultan Aji Muhammad Sulaiman Sepinggan International Airport, Balikpapan)
Authors: Yanti  , Enriko T. M. , Baidowi  , Pius  , Suryo Putranto Leksmono 
Published: July 2020

Abstract
Sultan Aji Muhammad Sulaiman International Airport, Sepinggan, Balikpapan or abbreviated to SAMS is the largest airport in East Kalimantan Province. it is necessary to conduct a deeper study of the airline services performance on passenger satisfaction. From this study, it is expected that the service performance information will be obtained including ticket information, service officers in the check-in room, service officers in the waiting room, services on the aircraft and others to provide input in service improvement. The research reported in this paper is investigating passenger satisfaction on flight routes from Balikpapan to Yogyakarta. The study was conducted by observation, interview and questionnaire distribution. The research plan is carried out from the beginning of January 2020 to June 2020 starting from preparation, investigation of passenger satisfaction, data analysis to research results. Respondents targets include Lion Air passengers, Garuda Indonesia passengers, Batik Air passengers, Sriwijaya Air Passengers and Citilink passengers.
Analysis of value engineering application at the design stage of a deep excavation system
Authors: Benjamin  , Johan J 
Published: July 2020

Abstract
This paper introduces a method of value engineering analysis by calculating the value coefficient of the substructure work in an office building project. Value coefficient is obtained by dividing the performance coefficient with cost coefficient, whose result shows that the retaining wall system is the main object to be developed. The retaining wall system used in the initial design is soldier pile consisting of rows of 80 cm diameter bored pile with a one-meter center to center spacing, which in each gap between two adjacent bored piles, a 40 cm diameter bentonite pile was constructed. The construction cost of the substructure generated from the initial design is Rp. 35,554,793,500.00. After implementing VE analysis, the VE team chose spun piles with 60 cm diameter (without bentonite piles) with 70 cm center to center spacing as a substitute for the initial design. The assessment performed by the VE team about the performance of the alternative indicates that there is 20.6% increase of performance compared to initial design and cost savings of 17.75%, resulting in a value coefficient of 1.22, this result is 47% higher than the initial design has, which is 0.83.
Innovation of quality improvement to reduce weld defect through six sigma methods in the fabrication process of power plant component
Authors: Puspa Wirani Ayu , Santoso Saroso Dana , Hardi Purba Humiras 
Published: July 2020

Abstract
This study aims to improve the quality of boiler through six sigma methods. Quality of boiler in the thermal power plant should be maintained with a good performance in order to assure that power plant can operate normally. DMAIC principle, defining, measuring, analyzing, improving, and controlling processes is implemented in this research. The reseach finding that the average rejection rate that exceeds the target rejection rate are Radiography Test (RT) of welding tube- tube, header-header, and header-end caps. Porosity is a type of weld defect that often occurs, around 36%. Project team concluded three critical that influence the output variables the most. These four variables are welder skill, welding fluxes gas, and welding condition. By implemented improvement of six sigma methods, sigma value increased from 4.1 become 5.
Kinematics analyses for robot motion
Authors: Siregar Wandro , Siagian Parulian , Rong-Shine Lin , Napitupulu Richard AM. , Tampubolon Miduk , Simanjuntak Sutan LMH 
Published: July 2020

Abstract
This project is a part of the analysis which aims to find solutions to the kinematics problem that exists in the movement of the robot arm. In order to control the robot manipulator as desired, so it is important to consider kinematics models in the design of control algorithms. Which in this report presents a mathematical model and kinematics parameter for the robot kinematics. The solution of the forward kinematics based on the matrix transformation method are given and the results are obtained using Matlab software.
Lead-free solder SAC 305 Volume Reduction and Cold Slump after Stencil Printing Process
Authors: Rusdi M. S. , Abdullah M. Z. , Abdul Aziz M. S. , Abdullah M. K. , Ishak M.H.H , Rethinasamy P. 
Published: July 2020

Abstract
The present work studied on the volume reduction and cold slump effect for lead-free solder. The solder paste SAC305 type 3 was used to study the effect of waiting time on the solder volume and height at room temperature. DEK 265 was used for the printing purpose and KOH YOUNG Aspire 2 was fully utilized for the measurement of solder volume and solder height. The experiment was conducted for 120 minutes with 15 minutes gap between the measurements. Three types of components size (0603, SOT and Tantalum-D) was compared to see the effect on different components sizes. Solder paste volume and height shows a reduction from its initial values after 120 minutes for all three components size. For solder volume, biggest size component, Tantalum-D give lowest volume reduction at 3.55% compared to 0603 (3.68%) and SOT (3.76%). Meanwhile, solder height gives different results where Tantalum-D have the highest height reduction at 2.8% while SOT and 0603 have lower height reduction at 2.17% and 1.84% respectively.
Concept design of high interface powerbank
Authors: Gunawan Verry , Christiardy Nicholaus , Purna Irawan Agustinus 
Published: July 2020

Abstract
In this era where technology is the most valuable thing, many people demand a device that can provide multifunctional and high-speed multitasking skill in one simple device. Smartphone came with that technology and so much more advantages. Beside these advantages in smartphone, there are also some disadvantages for example power drain. After an intense study and learning the market needs, we introduce HIPO. HIPO came to cope the problem that happen to smartphone users with its feature as a power bank in a smartphone and its user-friendly interface. With a great feature such as fast charging (3.5 hour), large memory storage up to 256 GB, 32 MP camera, big battery capacity, HIPO will helps you to have your job done anywhere and everywhere without worrying that your smartphone will be run out of power.
Comparison study between nearest neighbor and farthest insert algorithms for solving VRP model using heuristic method approach
Authors: Kosasih Wilson , Ahmad  , Laricha Salomon Lithrone , Febricky  
Published: July 2020

AbstractIn Indonesia, transportation costs from physical distribution still tend to be high because not all business people can optimize their distribution routes. This paper discusses a comparative study between Nearest Neighbor and Farthest Insert algorithms in solving a Vehicle Routing Problem (VRP) model. Aim of this study is to determine the most optimum distribution route so that the distance or time or transportation costs can be minimized. This research was conducted at a bottled water distribution company. In the end, the comparative study was considered effective as a basis for decision making on the distribution route, where there were indications of distance savings or reduced costs, and increased utilization of the higher vehicle fleet.
Personal Performance Measurement of Project Manager using Project Manager Competency Development Framework (PMCDF®) (Case Study PT.XYZ)
Authors: Wahyuni Sarah , Pratami Devi , Fuad Bay Achmad 
Published: July 2020

Abstract
PT. XYZ is a company engaged in telecommunications construction. So far, the company has conducted performance appraisals of its employees using the rating scale method. The assessment conducted by the company is less objective because the assessment is carried out by two supervisors of the object being assessed. In addition, the results are only used for consideration of promotion. The format made by the company also has no KPI or minimum value used in assessing. Based on this, a valuation format and a more objective assessment system are needed with the aim of knowing how the personal competencies of managers. Personal competency measurements are carried out at the project manager level with an assessment format based on PMCDF®, 360 feedbacks as a scoring system, and AHP as weighting on six PMCDF® competencies. From the results of the study, the priority results obtained in the six competencies variable PMCDF® are Managing with a weight of 40%, Leading with a weight of 23%, and Communicating with a weight of 11%. The personal competency score of the project manager for each competence is in good category.
Measurement of Risk Project Maturity Using Organizational Project Management Maturity Model (Opm3): Study Case Of Construction Project In Bandung
Authors: Arif Wijaksono Fanjar , Pratami Devi , Fuad Bay Achmad 
Published: July 2020

Abstract
The issue to project failure has been a common phenomenon to many construction companies. The impact is very critical to companies to which it leads to the late completion of the project and also an over budget. Lack of planning, conducting a lot of changes, and bad executing process are the reasons behind it. If this kept going on, project failure would be a major threat to the companies in which it may drag them to suffer a far greater loss. As a solution, the project maturity assessment comes into existence to put back the projects onto the track and to overcome the project failure. Company XYZ is a construction company to which it conducts a project. It is experiencing issues to which it may potentially be a project failure to it. This research uses the Organizational Project Management Maturity Model (OPM3) as a tool to assess the maturity level of Company XYZ. The specific focus is on the Project Risk Management Knowledge Area. The research is conducted using questionnaire spread across the project team which consists of 1 project manager and 4 project supervisors. At the end, the result of the research shows that the company is in the bad condition of performance. Its maturity level sits in the lowest level. The result also shows that the project team has not met the requirement of the top management.
Design of Procurement Process Monitoring Dashboard for Supporting Food Security Supply Chain Risk Management System in Indonesian Bureau of Logistics
Authors: Aulia Alfazah Detha , Yanuar Ridwan Ari , Yulianti Femi , Giri Artha Kusuma Putu 
Published: July 2020

Abstract
Food Security is a conditon for the fulfillment of food for every people. Rice as one of the main commodities in Indonesia and it can affect a country’s economic stability. The government in Indonesia established Bureau of Logistics (Bulog) to maintain food security. Perum Bulog Subdivre Bandung is one of the regional sub-divisions under the auspices of Perum Bulog which manages the distribution of rice to the five regions of Bandung. Bulog has the duty to maintain the pillars of Food Security including Availability, Accessability and Stability. Rice Procurement process is an important process. To maintain the pillars, Bulog need risk identification in the rice commoditiees procurement prosess using SCOR, FMEA and AHP. there are 12 risk events and 16 risk agents which are divided based on the three pillars of food severity and for mitigation strategies are divided into 3 main causes with 3 alternatives from each main cause. So that in order to facilitate monitoring, a monitoring system dashboard was designed for the Perum Bulog Subdivre Bandung
Analysing Company’s Performance by Using Sustainable Supply Chain Management (SSCM)
Authors: Sembiring Nurhayati , Tambunan Mangara M. , Ginting Elisabeth 
Published: July 2020

Abstract
Due to consider the consumer needs, there is a significant amount of researches about SSCM. The integration of sustainability and SCM is very important to be studied deeply. This paper contains results of analysing content about assessing all journal studies systematically in SSCM literatures which published from 2018 to 2019. Performance of company in economic, environmental and social scope could be analysed by using Sustainable Supply Chain Management. Researches that have done also investigating factors that support SSCM practice. The researchers are positioned to speak to the issue that unexplored to the field of SCM such as policy implications of existing work.
Lean Six Sigma and Business Engineering Perspective of Electrical Energy Optimization
Authors: Chasun Aminuddin , Suratno  , Edi Nugroho Soebandrija Khristian , Indra Wijaya Dendhy , Khair Fauzi 
Published: July 2020

Abstract
This paper combined both theoretical perspective of Lean Six Sigma and Business Engineering; and its managerial implementation within electrical energy company in Middle East. The mentioned company is producing nitrogen gas for the supply purpose of oil, chemical and manufacturing industry processes. Integrative part of this company’s strategic objectives refers to profitability improvement and production performance through escalating company profit. In narrowed down objective scope, it refers to the Electrical Energy Optimization. This paper relates the mentioned company’s empirical and managerial implementation with theoretical perspective of Lean Six Sigma and Business Engineering. Quantitative approach of Lean Six Sigma and Six Sigma are capitalized in this paper’s research methodology to identify problem cause. This paper in particular elaborates the scholar view of Hadid et al (2016) on Lean Six Sigma. The mentioned scholar views within theoretical perspective. It investigates the interaction term between Lean’s social practices and technical practices against the performance measures of financial and operations. This investigation relates to the company’s strategic objectives as unit analysis in this paper. Furthermore, the scholar view of Bärenfänger and Steinbuß (2015) view Business Engineering in its Digital form of Business Engineering as a comprehensive method for digital business model design. Subsequently, data results in this paper convey its interpretation results from production division, which is approximately 81.16% of nitrogen gas that is originated from engine design as its problem cause. To conclude, within Lean Six Sigma and Six Sigma, this paper discussion refers to the value of 1.36 that becomes 2.62 ratio. Specific power of production decreases from 1.45 kw/Nm3 into 0.646 kw/Nm3, as originated from the escalating production of the so called highly impact the company performance versus costs incurred.Ultimately, it is harnessing discussion of the theoretical and managerial implication in this paper.
Carton Sheet Quality Control In Pt. Xyz Using Six Sigma Approach Method With Dmaic Tools
Authors: Ahmad  , Ariyanti Silvi , Widodo Lamto , Cristin Natalina M. G 
Published: July 2020

Abstract
Every industry ensures the existing system in the company runs well and continues to strive so that the products produced are able to meet customer satisfaction. PT. XYZ is a manufacturing company in Purwakarta which is engaged in cardboard boxes. This research was conducted by applying the six sigma method as a quality control product in PT. XYZ in order to reduce disability with DMAIC tools. By controlling the quality of the product that is controlling from the beginning to the distribution of products to consumers. It is known that the average value of waste at PT. XYZ reaches 5.36% which means it needs improvement. In the DPMO calculation it is proven that the company’s sigma value is 3.6 where if you want to raise it to 4 sigma there is a GAP of 0.4 with the largest type of crepe defect. After knowing the average waste and the existing sigma value, a standard improvement was made for the approval of the implementation for the company.
Application Of Quality Control Of Carton Box In Quality Control Department At PT Purinusa Ekapersada
Authors: Puspita Ningrum Clara , Gozali Lina , Widodo Lamto 
Published: July 2020

Abstract
This study aims to identify the cause of defect produced at PT Purinusa Ekapersada. Quality control (QC) is a process to measure the quality of an item by comparing it according to the specifications and requirements asked by the customer, or it can be said also as an effort to maintain the quality of the goods produced in accordance with predetermined specifications based on the customer’s request. The method used to reduce various types of defects produced by PT Purinusa Ekapersada was analyzed using the Pareto diagram to indicate the type of defect and the most of the control chart that produced defects were still within the control limits, a fishbone diagram describe various disabilities, and a 4M1E Why Analuysis to determine the causes and consequences of events.