bluuebunny/crossref_metadata_2025 huggingface dataset:
Flow pattern analysis on sticky regime and effectiveness of volume chamber for milk production using CFD method
Authors: Alwan H , Bindar Y
Published: December 2019

The Computational Fluid Dynamics (CFD) method is used to evaluate the performance of the spray dryer operation in various geometry and operating conditions. Through this method, the design information needed in the cylinder-on-cone spray dryer construction can be obtained. Especially related to the milk drying process. The numerical solution solved through the CFD method using FLUENT ANSYS 19.0 with turbulent model RNG-kε. The spray drying chamber in this study is represented in 2-D geometry. Flow patterns that have strong backflow can cause high particle end temperatures. This flow pattern is created in the small size of space and wide spray angle. The problem that is often caused in the presence of particle deposits on the walls and product agglomeration. The result is particle deposition that often occurs in the walls of the cone and near the atomizer. While agglomeration occurs in the product collection area. The design of the spray drying chamber which is considered the best to be built is a spray dryer with 2 m diameter and spray angle of 60° and 100° in order to produce the final product with the low temperature and water content.
Comparison on reinforced concrete bar strengthening using CFRP method, the IWF bar support addition, and bar dimension enlargement
Authors: Darwis Z , Kuncoro H B B , Vega M
Published: December 2019

Structure failures often happen whether caused by bad implementation, especially at reinforced concrete bar. Failures on building structure elements might be caused by several factors such as planned age of use, transformation on function, and even improper construction procedure. Thus, the reinforced concrete bar strengthening is required especially on a 10 m bar. This study focus is about comparison on strengthening the original structure of the building using the CFRP method which overlaying the bar surface, adding the IWF bar as a cantilever from below of the desired structure, and enlarging the bar dimensions. The result of the study shows that using 5 m2 CFRP overlaid on flexible reinforcement and 2.5 m2 CFRP overlaid in shear reinforcement get the results in Mn = 207.82 KNm and Vn = 146.33 Kn. Furthermore, additional 400, 400, 13, 31 IWF bar for the strengthening result is in Mn = 1045,32 KNm and Vn = 809,79 Kn. Dimension enlargement to 650 mm x 350 mm of 4D16 reinforced concrete and P10-250 mm reinforced cross-bar resulting in Mn = 529,23 Knm and Vn = 78,56 Kn. Effectiveness analysis is done to select the most effective method considering its strength gained and the cost that required.
The Influence of the use of horizontal pegs at distance of 15 cm to the shear strength of the laminated bamboo beam based on type of adhesive
Authors: Darwis Z , Kuncoro H B B , Aprilian R
Published: December 2019

Laminated bamboo can be used as an alternative elements of building materials. Laminates techniques can be used to form the building materials used as construction in large sizes. Previous studies have extensively covered the beam strength of laminated bamboo, type and crack. The test of the shear strength with the use of 60 MDGL A (Mutilayer Double Glue Line), resulting in shear fracture between bamboo material and not occur in the adhesive. Comparison between high beam size and the width is 120 mm x 60 mm. Further tested the strength of the beam to the shear capacity with four variations of adhesive. Using bamboo outer skin on the surface of the beam and the use of 50 MDGL adhesive variations. The results showed that there was no significant difference in shear strengths between the variations of each adhesive . Beam strength is highest test object is on 50 MDGL C with a value of 24.4 KN load with a deflection of 41.5 mm. The average shear stress laminated beams obtained is on 5.49-6.66 and 4.58 MPa. This strength is still greater than the strength of the wood beams in general, where the wood shear stress is 1.25 MPa class II.
The effect of mixing peatland burning remains as fly ash and peat soil on its California Bearing Ratio value
Authors: Ramdhiani E , Rahayu W
Published: December 2019

Peat has been known for its high compressibility, low shear strength and high-water content. Moreover, when it comes to dry season, peat can easily be burnt leaving the large amount of carbon into the atmosphere also causes significant damage to peatland ecology. Based on these, peat burning remains are used as fly ash and it is expected to improve the strength of peat soils alongside to be environmentally safe. Laboratory tests were carried out according to that condition. A study on the influence of fly ash addition in peat soils was done by comparing the result from CBR (California Bearing Ratio). Different percentages of fly ash (i.e. 15, 20, and 25%) were added into peat soil at optimum moisture content amidst 5% of Portland cement for each sample with a variety of curing time of 2 hours, 1 day, 3 days, and 7 days. Changes were observed in specific gravity, acidity, and the microscopic structure. The CBR test results show that the peat gained strength due to the addition of fly ash, with the optimum result of 5.36% for unsoaked condition and 6.35% for soaked condition. Furthermore, according to the results, the peat soil can be used as a subgrade.
Bio-asphalt on Asphalt Mixture containing RAP
Authors: Sihombing A V R , Subagio B S , Hariyadi E S , Yamin A
Published: December 2019

This study investigates the use of bio-asphalt, derived from coconut shell (BioCS) and straw (BioST) as an additive to determine its benefits in asphalt mixtures containing reclaimed asphalt pavement (RAP). The study was conducted by determining and comparing the laboratory performance properties of four mixtures and the binders extracted from the mixes. The four mixtures evaluated in this study included 30% RAP mixtures with and without bio-asphalt (BioCS and BioST) and comparable virgin mix. The result showed that bio-asphalt was effective in improving mixture performance of 30% RAP mix close to those of the virgin mix.
Comparison of direct SPT method for calculating axial capacity of piles in Jakarta Area
Authors: Henrina S , Bahsan E , Ilyas T
Published: December 2019

Estimating axial capacity of piles using Direct Method are still considered as challenges these days. Estimation mainly achieved after construction is done and field method such as static load test or PDA are used for calculating axial capacity of piles in real field cosnditions. This paper discussed estimation from 8 building project cases from Jakarta and Depok that have complete standard penetration test data and field calculations (static load test & PDA). The main objectives are to observe and correlate the results between every Direct Methods and field methods and to obtain which Direct Method is the most efficient to use for estimating axial capacity of piles in Jakarta area. Direct Methods that are used are Meyerhoff, Shariatmadari, Decourt, Aoki, and Robert. Calculation results showed that the most efficient standard penetration test method is that proposed by Decourt with average result of comparison between estimated axial capacity of piles and field calculation is roughly 1.03. The most underpredicted between every standard penetration test method is the one proposed by Aoki de Alencar with roughly 92% underprediction ratios and the largest overpredicted method is proposed by Shariatmadari with roughly ratios of 56%.
On the finite element bearing capacity analysis of a rib system to be used as shallow foundation construction
Authors: Soelarso  , Antaluca E , Batoz J.L , Lamarque F
Published: December 2019

The work is related to the Ph.D. subject of the first author on the analysis and design of shallow foundation systems in the context of earthquake resistant constructions in Indonesia. We focus here on a particular system called SNSF (Spider Net System Footing) that has been proposed and successfully used for around 10 years. This paper deals with the analysis of a unit cell of SNSF consisting of an assemblage of concrete vertical ribs and horizontal plate subjected to a central loading. We propose a geometrical 3D model and analyses based on 3D solid and shell elements for a detailed static analysis of the structure under central load or under self-weight. We also report some results considering the soil structure interaction, assuming linear elastic properties of the soil.
Performance of asphalt concrete mixture (AC-WC) using asphalt added with the waste of rice husk ash
Authors: Intari D E , Fathonah W , Saputro B
Published: December 2019

This study aims to determine the effect of the Rice Husk ash as additive into bitumen 60/70 penetration of the bitumen characteristics, and determine the performance of a mix of -Wearing Course Asphalt Concrete (AC-WC) using bitumen with added Rice Husk Ash.This research, using the Marshall method that used in some variation of Rice Husk Ash content and asphalt content. Variations are used for grade Rice Husk Ash is 4%, 6%, and 8% by weight of bitumen and asphalt content 4%, 4.5%, 5%, 5.5%, and 6%.These results indicate that the physical addition of Rice Husk Ash making asphalt becomes brittle and adhesiveness decreases can be seen from the decline in value of 1.17% asphalt penetration at levels of 0% to 8%. Judging from the test results obtained that Marshall Stability value decreased by 28.57% of the value of the highest stability.
Design of Carita Beach Coastline Tourism Area at Pandeglang Banten
Authors: Ujianto R
Published: December 2019

Waterfront area currently has a potential as a face of the city, it should not only being the behind area of the city. Waterfront area can be a tourist destination and a place that create social interaction, so that area can be the center of economic growth for the city especially in the field of tourism activity. Waterfront development experience many problems such as the loss of place quality. In the other side, private investment is not clearly regulated and causing the privatization of land in the shoreline area that should be the public space. Communities that received the impact of the development in the shoreline area are not to get involved in the planning process. This study formulates the design of tourism public space in a seaside area with attention to the image of an area and have the quality of public space. By analyzing design area both regionally and environmental context, in the findings obtained several principles that need to be considered to create a coastal tourist area as public space. In this study, planning and designing is required to involve the growth of coastal resorts can be run as a shared vision that avoids conflicts of interest.
Correlation of reinforcement concrete quality based on variations in UPV testing methods
Authors: Andi M , Baehaki  , Khadafi D A
Published: December 2019

Ultrasonic Pulse Velocity (UPV) test includes a simple Non Destruction Test (NDT) testing method, by utilizing ultrasonic waves. In the implementation of UPV testing with direct, semi-direct, and indirect methods give a quick result of different pulse velocity, with the same quality of concrete. Therefore, this study was conducted to get the correlation and correction value of all three testing methods with PUNDIT Lab+ tool on reinforced concrete. The study used a speciment of concrete beams 15x15x60 cm3 with concrete quality K-275, K-250, K-225 each as much as 3 specimen. The average value of the measurement result with the direct UPV method is 12%, 7% and 5% less than the average value of the semi-direct method of UPV direction vertically, the semi-direct method of the UPV direction horizontally, and the indirect method UPV. Conversion of the measurement results for the direct UPV method of the semi-direct UPV vertical direction, semi-direct UPV direction horizontal and indirect UPV can use the regression equation Vd = 0.2462 Vsd-v + 3192, Vd = 0.1073 Vsd-h + 3923.8 and Vd = 0.0195 Vin + 4341.8.
Capacity and performance evaluation of the drainage system Jati Pinggir - Petamburan Central Jakarta
Authors: Wigati R , Notonegoro H A
Published: December 2019

Flood problems become a crucial problem in the city of Jakarta. Jati Pinggir - Petamburan area is one of the affected floods. The density of the population and the narrower open land for water absorption causes the accumulation of standing water. The increased flow of water inundation affects channel capacity. For this reason, it is necessary to examine the ability to exist flood control buildings such as drainage canals, reservoirs and pump houses to deal with flooding with a 10-year return flood discharge in Jati Pinggir - Petamburan. Analysis of regional rainfall data, 10-year return period flood discharge, existing channel dimensions, the capacity of the pond and pump needs were used in this study.
The driver and barrier of implementation green supply chain management (GSCM) in construction projects
Authors: Handayani N U , Rinawati D I , Wibowo M A , Gabriella T , Ulkhaq M M
Published: December 2019

Climate change due to rising greenhouse gas emissions and resource depletion is one of the major challenges of the twenty-first century. Construction waste is not only associated with energy use and waste of materials in the construction process but also other activities that do not add value such as repair, waiting time and delays. Concepts such as waste and value are not well understood by construction personnel. They often do not realize that many activities they carry out do not add value to the work. These issues contribute to a reduction in the value of construction productivity and could reduce company performance. The aims of this GSCM study on the construction sector are to identify: (i) the drivers of stakeholders to implement green practices and (ii) the barriers faced by stakeholders in the implementation of these practices. The research methods are literature study and fields observation, where the experts were asked about their opinions related to barriers and drivers to implement the Green Supply Chain Management (GSCM) in construction. The results showed that each phase of GSCM has barriers and drivers. The barriers and drivers are involved in Green Initiation, Green Design, Green Material Management, Green Construction and Green Operation and Maintenance.
Development wedding planner using extreme programming method
Authors: Novianti E , Susilawati E A , Sesunan M F , Syamsiyah N , Astuty E Y
Published: December 2019

This research will provide wedding planner with time management and comparison budget with several Indonesian Traditional wedding package. The development of wedding planner will use extreme programming method and implement project management plan to arrange the wedding. The development of this application will use CodeIgniter as a framework which is easier to continue on the next development. The final result of this research is a wedding planner to help bride and groom to easily maintain their schedule with wedding organizer on their pre-wedding. Moreover, Indonesian bride and groom more into traditional ceremony and on the budget with tight schedule, this wedding planner will compare several package and flexibility with schedule and reminder to give alert in order to keep on the timeline.
Development of an android document management
Authors: Dewi L P , Noertjahyana A , Wahono T J
Published: December 2019

Many previous researches shown the percentage of population using mobile technologies was increasing constantly, included in Indonesia. This growth apparently also supported by Android penetration as an Operating System and the easier of internet access. Mobile phone has become the main device in daily life, included in business activities. People increasingly need a mobile phone as gadget for storing various documents. This research is designed to address the document management application in Android. Application help to organize, retrieve and modify document contents. With this Android application, users can use it to store documents and can combine several documents as desired. This application works based on HTML format file. Therefore, the original files are converted to html format. While the conversion process cannot be done directly, but the original file is converted to pdf and then converted to html. All the conversion process is done in the server and application retrieve the result as HTML file for displaying in the mobile phone screen. During the converting process, it is found that the number of concurrent users is not relevant with the server respond time. The server respond time is determined by document size.
Development of guide stick navigation for blind person using digital compass and global positioning system
Authors: Agusutrisno  , Wiryadinata R , Novianto M N R
Published: December 2019

The limited use of navigation technology poses a risk to blind person becoming lost, while in a foreign place and causing them to rarely travel. The purpose of this study is to design guiding sticks for blind person by tracking and homing. The position of coordinates and wind direction is processed into information on sound signals and vibrations. The method used in this research is GPS bearing and inverse angle, using compass and ultrasonic sensors. Afterwards, the data output in this system is directional information in the form of sound, besides information in the form of an obstacle when in front of the sensor. The test results prove that the GPS bearing method can produce a more stable direction. However, GPS accuracy can decrease when it is blocked by trees and buildings. While the inverse angle method, GPS data is stored on the data logger, which does not require GPS accuracy when determining direction. The angle of the direction is more accurate if the average angle when tracking is not too wide.
Comparison of acceleration python library on design and implementation of QRS detection module from ECG heart signal
Authors: Wicaksana C A , Febriani R , Muhammad F
Published: December 2019

Electrocardiogram (ECG) signal is one of importance signal from our body that sourced from heart. There are many benefits that can be obtained from ecg signals, for example can determine whether sleepy/stress or not, and several diseasses like arrhytmia, hypertension, heart failure, etc. In this research, we created sub-module for extraction feature for ecg signal using GPU Acceleration, but in this research only emphasis on QRS detection and peak detection from ecg signal. The input will be ecg Signals and the output will be array of peak in every row. There have been various research trying to extract or detect QRS and peak based on Pan-Tomkins Algorithm, but this research will make use python and will compare the acceleration using some library. The flow comprise five main step, (1) load ecg signal, (2) filtered ecg, (3) derivative from filtered ecg, (4) squaring from derivative ecg, (5) convolution squaring ecg, and (6) peak detection using Fiducial Mark. The overall module has been succesfully implemented and compared in python. The result show that computation using numpy is still better and faster for small array data. The Output of peak of array can be used to the next module.
Monochromatic and rainbow 4-connectivity of moon graphs
Authors: Shulhany M A , Rachim D K N , Rukmayadi Y
Published: December 2019

Monochromatic and rainbow connectivity are known as the concepts that can calculate the minimum number of passwords and security systems. In this paper, a security system is represented by a special mathematics object, namely a graph. The study focuses on the moon graphs or Mon. Moon graphs are chosen because it is one of the 4-connected graphs that has a minimum number of edges. The research method used is mathematical modeling equipped with direct proves and contradictions. The conclusion is that there is an efficiency of 75% when using the monochromatic connected number, and there is an efficiency between 62.5% - 75% when using the rainbow 4-connected number.
Design of direct load control device and its effect on load reduction
Authors: Garniwa I , Wardana N S
Published: December 2019

Demand for air conditioning is rising at an unprecedented level. Sudden increase in air conditioning usage has a potential of destabilizing the power grid and at extreme condition can cause power outages. Ability to control air conditioning is therefore a very significant subject for both the electric power utility and electric power consumer. In some developed countries, this is realized by a program called demand-side management. The progress of information technology and the increasing affordability of the cost of fabricating electronic devices have given rise to new concepts in the implementation of demand-side management programs, namely the direct load control method. Direct load control is a mechanism that allows demand-side management programs to run automatically without interference from consumers. This is done by directly controlling consumer electricity equipment through the internet or other wireless communication networks. This study analyzes a method to design a controlling device to be used in direct load control implementation. Load demand of the system is compared between before and after the installation of direct load control devices. Significant load reduction is noticed after the installation of direct load control devices.
Analysis of implementation UPFC for optimizing power flow & improving power system stability in Z power system
Authors: Nugroho A A , Rahardjo A , Setiawan A , Jufri F H , Husnayain F
Published: December 2019

In electric power systems, it will started from the generation phase until the distribution phase through transmission lines must take place well. The purpose of study is to analyze the implementation in optimizing the power flow and improving stability in Z Power System. Therefore, it is necessary to have sufficient electricity distribution so that the electricity sent can be as efficient as possible. In the Z electric power system, there are many problems in electric power transmission, namely loading on uneven channels and the threat of extinguishing in the event of a disturbance. Uneven load is caused by differences in impedance on the channel. Blackouts occur because the channel on the Z is a generator evacuation route where the area is crucial if a disturbance occurs. Therefore, a tool is needed to prevent it. One solution to this problem is to use a power electronics device called UPFC. The simulation results show an even distribution on the all transmission lines connected to substation of Generators will be decrease up more than 3% of the normal loading. In addition, the UPFC can also improve stability by compensating for the active power and reactive power needed by the system.
Transient stability improvement by FACTS devices: A Comparison between STATCOM and SSSC in an extra high voltage transmission system
Authors: Wibawa B C , Prastiantono A , Aryani D R , Setiabudy R , Husnayain F
Published: December 2019

Loss of 500 kV A–B transmission line causes voltage instability in surrounding subsystem. This condition may cause further disturbance in the whole interconnected system. Improvement of voltage stability can be handled by adding FACTS devices, such as Static Synchronous Series Compensator (SSSC) and Static Synchronous Compensator (STATCOM). SSSC and STATCOM have the capability of dynamically controlling the power flow through a line. This paper aims to compare the performance of both devices to increase system stability. These methods are compared by analyzing the bus voltage, active power in line and rotor angle. As a result, this paper shows that the implementation of STATCOM is more stable in state of SSSC.
Design of monitoring system for drying and storage of shallot
Authors: Haryanto H , Saraswati I , Ahendyarti C , Rahman A , Oktorida R
Published: December 2019

Thermo electric cooler is an environmentally friendly cooling component because it does not produce harmful substances such as Freon or CFC which is usually produced by refrigerant and air conditioning so as not to damage the ozone layer in the atmosphere of the earth as well as global warming. In principle, TEC has a capability called peltier effect that is the temperature difference when the component is fed by an electric current. On one side of the TEC will absorb the heat and on the other side release the heat, in conditions absorb the heat of the TEC side becomes cold, while the heat-releasing side will be hot. With such unique capabilities, TEC can be applied to an air conditioner and heating device, so it can be used for other purposes or interests and without having to contribute harmful substances to the environment and atmosphere.
Microcontroller-based assistive device for training weak biceps brachii muscle
Authors: Gunadhi A , Mustofa F Z , Agustine L , Pranjoto H , Sitepu R , Yuliati
Published: December 2019

A person with a certain degree of biceps brachii muscle weakness will not able to move the lower hand. The muscle needs contraction and relaxation practice regularly to avoid the condition getting worse. An electromyography-based assistive device has been developed. It uses biopotential signals from biceps brachii muscle when contracted and relaxed to control the elbow flexion and extension movement of the weak hand. The device uses a Muscle Sensor V3 module to sense the muscle biopotential signals, and also an Arduino Nano 3.0 microcontroller module and a servo motor to control the elbow movement. The elbow movement is limited to 90° to its maximum degree of movement at 170°. It is the range of elbow movement that used in a method to work out the biceps brachii muscle. The starting process needs to adjust elbow position manually using potentiometer to 90° angles. This device can work properly when stimulated by the biceps brachii muscle biopotential signals and produce as low as 0,0977V at the input of the internal ADC of Arduino Uno 3.0 when the muscle contracted and lower than that voltage when it relaxed. The device consumes low power to operate at 0.374watts.
Risk-based thinking on calibration and testing laboratory: Current challenge in transition period
Authors: Habibie M H , Basuki B
Published: December 2019

This research was conducted to discuss the application of risk-based thinking concept in calibration and testing laboratories. This research is motivated by the publication of the new edition of ISO/IEC 17025:2017 standard that applies the principle of risk-based thinking. From the results of the JCRB 39/3 resolution, full-implementation of ISO/IEC 17025:2017 standard by calibration and testing laboratories is no more than 3 years after publication. In addition, the National Accreditation Committee (KAN) as an accreditation body in Indonesia requires calibration laboratories and testing laboratories to switch their management system to ISO/IEC 17025:2017 standard starting at 2018. This research is carried out by identifying the risks found in calibration and testing activity. Clause 8.5 of ISO/IEC 17025:2017 is applied to take actions to minimize or eliminate risks that have been identified as preventive or corrective actions. In this research, 5x5 risk matrix is also used by considering the impact and frequency of risks in the calibration and testing laboratories.
Bibliometric analysis of the term ‘Three-Dimensional Concurrent Engineering’
Authors: Ilhami M A , Subagyo  , Masruroh N A
Published: December 2019

Three-dimensional concurrent engineering (3DCE) concept provides a new approach for integrating product, process, and supply chain design. The opportunities to shorten product development lead time and time to market eventually, increase product variant and quality, and reduce product development costs become a concern. However, the 3DCE approach is not yet comprehensive since the researches are continuing and growing. This article provides a bibliometric literature review on 3DCE as a term and concept through mainly Scopus database and Mendeley software for managing and resuming the references. After manual filtering and reading we conclude 39 articles strongly related to the term of 3DCE. Finally, we classified the articles based on its keywords into two clusters of words using VOSviewer software. Moreover, we found that ‘supply chain’, ‘product development’, and ‘product design’ were the most frequently used for keywords, titles, or abstracts that represented the research stream or the researcher’s background.
A Computerized measurement system of machine performance for a textile industry
Authors: Sakti S , Panjaitan A E D , Asih A M S , Sopha B M
Published: December 2019

The increasing development of the textile industries has made the competition sharper. To maintain a competitive place in the market, it is critical for a textile industry to keep their production effectiveness at the highest level. Total productive maintenance (TPM) can be done to improve production performance, both in terms of quantity and quality. How successful the TPM implementation is measured by Overall Equipment Effectiveness (OEE) which shows the effectiveness level of a particular machine. The imbalance pattern between target and actual production in almost all departments in the textile industry encourages OEE analysis to determine the performance of each machine they use. However, operators are facing difficulties in measuring OEE for every machine manually. This study aims to develop a computerized database system to help measure the OEE calculation so it can help the company knows their real-time machine performance. It automates the process of OEE calculation and identify the losses associated with equipment effectiveness. The developed system is validated using the historical operational data of a Spinning Department in a textile industry.
The proposed improvements to minimize potential failures using lean six sigma and multi attribute failure mode analysis approaches
Authors: Ulfah M , Trenggonowati D L , Ekawati R , Ramadhania S
Published: December 2019

PT X is the largest steel industry in Indonesia. During the production process, still have large quantities of waste defect. The purpose of this research is to determine the waste that occurs in the production process, determine the characteristics of deformity or critical to quality (CTQ), determine the sigma value, determine the factors that caused the failure of the production process, and determine the proposed improvement to minimize the failure of the production process. The most dominant types of defects are serrated edge, wavy edge, poor cleanliness, pick up, edge crack, ripple edge, and bad weld. The sigma value of cold rolled coil product is 4, 131 which is included into the industry average of USA (± 4σ). Factors that caused cold rolled coil production process failed based on criteria severity, occurrence, detection, and expected costs by Fuzzy Analytical Hierarchy Process (F-AHP) is material imported from outside with a total weight of 0.087. Proposed improvements done to minimize failure in cold rolled coil production processes are doing trial for products from HSM factory to test or know the slab specifications related to the chemical constituents of steelmaking and adjusting the format (such as thickness, length, width) and steel specifications to corresponding.
Effect of online shopping on consumptive behaviour of female workers in Cilegon, Banten, Indonesia
Authors: Partuti T , Kambuna B N H , Dwiyanti Y
Published: December 2019

This research was carried out as a form of responsibility for the implementation of an internal research grant from Faculty of Engineering, University of Sultan Ageng Tirtayasa on women’s studies. This research is a qualitative and quantitative study to analyse the influence of online shopping on consumptive behaviour of female workers in Cilegon City, Banten Province, Indonesia, especially who live at Kebondalem village. The independent variables in this study are Cultural Factors (X1) and Psychological Factors (X2). The dependent variable is consumer behaviour (Y). There were 50 respondents involved in this research and filled the questionnaire with a Likert scale with 4 alternative answers. Hypothesis testing is analysed with t-test (partial test), F-test (simultaneous test), and R-square test to determine the effect of independent variables with dependent variable using SPSS program. The F-test result the regression equation is not linear, with the equation is Y = 11.654 + 0.110 X1 + 0.197 X2. The R-square test gives the correlation coefficient is 0.119 and correlation between the dependent and independent variable is very weak, even considered to have no relationship. The t-test result shows that cultural factors and psychological factors did not significantly influence female worker’s consumptive behaviour.
Using cluster analysis for location decision problem
Authors: Chain P , Arunyanart S
Published: December 2019

Numbers of cattle farms have been increasing throughout the production regions. The aim of this paper is to investigate appropriate locations of regional food distribution centers in Northeast Thailand for distributing feed to cattle farms. A geographic information system (GIS) was used to map spatial data locations from 421 standardized cattle farms in 63 districts from Northeast Thailand. Hierarchical agglomerative clustering was applied as a statistical technique to sort datasets into homogeneous groups and three clusters were identified. The center of gravity (COG) method was then used to find the optimal locations of food distribution centers, with results suggesting Chatturat district, Pa Tio district, and Wang Sam Mo district as most suitable for distributing feed to cattle farms.
Analysis of provider training business model development based on canvas business model approach
Authors: Sutrisno W
Published: December 2019

The importance of increasing skills and expertise of human resources has affected the increasing of the demand for training provider services. This opportunity causes competition among many training providers. In order to strengthen each provider, it must employ an innovative business model such as canvas business model method. PT. X is one of training providers in Yogyakarta who needs to improve its business model so it can be more competitive among others for the long-term business. This study aims to identify and evaluate the current business model, and design an appropriate a business model based on canvas business model method. The study showed that PT. X needs to develop its business models by adding a renewable value proposition; expanding its consumers through cooperation with hotels and freelancers; creating a consumer community of PT. X; and gaining new additional revenue.
Virtual traffic simulation for minimizing average of vehicle queue length in Serang city Indonesia
Authors: Irman A , Satria D , Dewantari N M , Arliannur  , Ero T
Published: December 2019

Almost the big cities in the world has the traffic jam problem. Serang City as the capital city of Banten-Indonesia has the same traffic problem, without a good integrated public transport, makes the problem of traffic transportation in Serang City becomes heavier. Virtual traffic simulation is known as powerful tool for generating alternative solution to minimize the traffic problems. This research use PTV Vissim as virtual traffic simulation software to minimize the traffic problems in Serang City. Serang City has 6 sub-district area, there are Cipocok, Curug, Kasemen, Serang, Taktakan, and Walantaka. This research focus on vehicles traffic only in area of sub-district Serang with 5 main traffic lights crossroad. PTV Vissim uses to simulate the 5 of the main crossroads and find the average of the existing vehicles queue length in rush hour. Trial and error operations such as traffic lights timing and routing modification use to generate alternative solutions for minimizing vehicles queue length as traffic performance in this research. The result of this research has found the rush hour in Serang City occured at 06.00-10.00 and 14.01-18.00 (UTC +07:00), and the routing modification in Kebon Jahe can reduce the average of queue length for 53%.
Measurement of e-service quality from user perceptions using the IPA-Kano integration model
Authors: Wahyuni N , Gunawan A , Rahmawati A
Published: December 2019

Users have a very important role in the service industry. If the users are satisfied with the service, then they will reuse it in the future. Conversely, if they feel dissatisfied, users will look for similar services from competitors. In this research, the case study is XYZ, one of online marketplaces that have begun to evolve in Indonesia. The research purpose was to measure e-service quality from the perception of users by using the Kano-IPA integration model. The research methodology used is by distributing questionnaires. Service attributes are based on the dimensions of E-Service quality; consisting Efficiency, Fulfilment, Reliability, Privacy, Responsiveness, Compensation and Contact. The number of service attributes designed is 28. Respondents are users of the XYZ in Cilegon. Importance Performance Analysis (IPA) is one of satisfaction analysis methods that is commonly used to map the level of satisfaction with the level of importance of service attributes. On the other hand, the Kano model classifies service attributes under the category of Must-Be, Performance, and Attractive. The results shown that the Compensation dimension still needed serious attention from the management. The highest level of satisfaction felt by service users was in the Privacy dimension.
Evaluation of turnaround maintenance practice effects in the process industry
Authors: Khasanah R , Jamasri  , Yuniarto H A
Published: December 2019

Process industry such as the petrochemical industry is a kind of industry where the production performance depends on production equipment and assets. Thus, preventive maintenance becomes a very important way to achieve sustainable production in the process industry. The effectiveness, efficiency, reliability and maintenance of the equipment are vital for the uninterrupted, continuous and efficient operation. Turnaround maintenance (TAM) plays the most important role of preventive maintenance activities because it is an essential activity of maintenance in the process industry to improve the availability and reliability of the assets includes plant facilities, equipment and machinery. This study evaluates the effect of Turnaround Maintenance on the condition of the assets in the process industry using the statistical method. The significant variables used to analyze the effect of TAM are Plant Availability and Downtime Loss. The result shows that the correlation value between TAM occurrences with the increasing of availability is 0, 315 and with the increasing of downtime loss is -0, 818. The correlation value proves that TAM have a significant effect to increase the availability of the plant and to decrease the downtime loss in the real process industry practice.
Designing employee workload calculation based on Java-based full time equivalent method
Authors: Wahyuni N , Gunawan A , Ferdinant P F , Fitriyanti E
Published: December 2019

The measurement of workload is carried out to determine the amount of burden on a position through job description. Before determining the number of man power, it is necessary to measure the workload for a certain position. The method commonly used is the Full Time Equivalent (FTE) method. The FTE method is used to calculate workloads with various task variations. The case study is ABC, a machine maintenance service company. As a company engaged in the service sector, having high quality and proportional number of human resources (HR) is important in order to provide the best service for customers. For this reason, an application is needed that can support FTE calculations. The purpose of this study was to find out the number of employees by calculating workloads based on the Java-based FTE method. The design of this application is done using the System Development Life Cycle (SDLC) approach. The design of this application starts from the stage of analysis, design, coding, testing, and maintenance. Functional needs refer to the HR division as user and administrator. The research findings to facilitate the relevant divisions or decision maker to add personnel or reduce them using the application.
A Condition-based maintenance and spare parts provisioning based on markov chains
Authors: Nurhasanah H , Ridwan A Y , Santosa B
Published: December 2019

Machine is a vital tool of the company in helping the production process. Every company expects the production to run smoothly, but sometimes it is hampered by damage that happened to the machine, so that the production process is disrupted and causes losses to the company. Engine damage can be minimized by regularly evaluating the condition of the spare parts. In practice, if the spare parts inventory policy is not accurate it will cause stock outs or overstocks, which can lead to more costs for the company. The worst case is if there is no spare part stored in the warehouse when it is needed, it can make the production floor stopped, which in the end makes the company can’t fulfil their production target. This research aims to obtain an optimal preventive maintenance schedule by calculating the machine’s reliability and inventory provisioning policy for the spare parts according to predicted amount that will be needed in the future calculated using Markov chains so the company can determine the reorder point (r) and the economic order quantity (EOQ).
Maintenance system design on air jet loom (AJL) machine using reliability centered maintenance (RCM) method
Authors: Setiawan D , Jusolihun N , Cahyo W N
Published: December 2019

Air Jet Loom (AJL) is a critical machine in textile industries, used to convert thread into fabric. This research used a leading textile company in Yogyakarta as a case study. Preliminary observation in the case study showed that the AJL machine had a high downtime that affects the overall production process. This study aimed to identify critical components of AJL machine and designed maintenance system for AJL machine to reduce downtime. Reliability centered maintenance (RCM) method was used in designing maintenance system by focusing on improving machine reliability. The study began with the identification of critical components of AJL machine using a fishbone diagram and continued with pareto diagram. For each critical component, time between failure (TBF) data was collected. The collected TBF data was then used to calculate the level of reliability and maintenance schedule. The results found that there were six critical components of AJL machine, i.e., VPM, take up, insertion, kamran, oil circulation, and leno. The preventive maintenance scheduling interval for the six components was VPM 120 hours, belt take up 144 hours, insertion 72 hours, kamran 24 hours, oil circulation 144 hours and leno 96 hours. The proposed preventive maintenance schedule on the six critical components of AJL machine was able to reduce downtime by 30% and increase fabric production by 13%.
Optimal design of mechanical and physical quality of pottery using TOPSIS method
Authors: Sugarindra M , Parkhan A
Published: December 2019

The quality of pottery can identify from the mechanical properties and physical properties of the pottery resistance to mold and mildew. Mechanical properties can measure by bending strength and impact strength, while physical properties can measure from water absorption. The Small Medium Enterprise (SME) production pottery in Klaten has a bending strength of 9.03 MPa, affect the strength of 0.0844 Joule/mm2 and water absorption of 14.69%. One competitive strategy is to improve product quality. Improving the quality of pottery products can be done by improving the mechanical properties and physical properties. Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) is a multicriteria decision making method. TOPSIS method can provide the best alternative choice based on the quality attributes of the product used. The results from this research showed that the combination of level factors that produced the optimum quality have bending strength of 10.21 Mpa, impact strength of 0.0798 Joule/mm2, water absorption of 11.75%. Based on the sensitivity analysis of attribute weights, it found that changes in the order of priority weights were sensitive only in the order of impact strength, bending strength, and water absorption.
Warehouse server productivity analysis with objective matrix (OMAX) method in passenger boarding bridge enterprise
Authors: Basumerda C , Rahmi U , Sulistio J
Published: December 2019

One of the leading keys to successful management in Inventory Management is Human Resource. Its productivity directly improved the production process performance. This research objective is to analyze warehouse server productivity by incorporating Objective Matrix Method (OMAX). Three criteria are observed, they are Service Time, Database Input Time, and total output. The observation was conducted in 5 days. The object in this research is server at two warehouses in a passenger boarding bridge enterprise. First worker productivity is increase for 4 days with average Index Performance 141,67% and decrease in one day with index performance 33,33%. Meanwhile, second worker productivity is decrease for 4 days with average index performance 70,84% and increase in one day with index performance 33,33%. Productivity between one server with others were unequal. Based on the difference, furthermore analysis is done by using cause-effect diagram (fishbone) to determine the root of the problem stated. The cause of the problem is each server has difference technical ability, there is no Standard Operating Procedure for warehouse service and database input process, the warehouse layout and the working environment is not practicing proper 5S (sort, set in order, shine, standardize, sustain).
Evaluation on Rupture Characteristics of CNG Vehicle Container by Heat Treatment using AUTODYN
Authors: Soo Kim Eui
Published: December 2019

The vehicle using compressed natural gas (CNG) trend to be extended in use internationally as optimal counterplan for reducing discharge gas of light oil due to high concern about environment. However, because NGV (Natural Gas Vehicle) is equipped with composite pressure vessel (CPV) and the CPV contain compressed natural gas, the risks in the case of accident is very high. The main cause of rupture accident for NGV is due to the defect of heat treatment for the vessel at the manufacturing stage and the rupture characteristics vary greatly depending on the heat treatment conditions. In this study, explicit dynamics analysis was performed to evaluate the bursting characteristics of the CNG pressure containers by heat treatment. Explicit dynamics analysis is numerical analysis method applied to the large deformation analysis that occurs instantaneously such as collision and explosion. The condition of the defect for heat treatment is that quenching and tempering temperatures applied to the normal vessel were adjusted and explicit dynamics analysis was performed using AUTODYN for each case. It is possible to understand how important the heat treatment process is in the high pressure vessel unlike any product.