bluuebunny/crossref_metadata_2025_split huggingface dataset:
Proportion limits the effect of mixture of red brick stone on concrete strength
Authors: Farida I , Krisdian A , Walujodjati E , Roestaman R 
Published: December 2019

Abstract
The proportion of concrete material affects the strength of concrete. The innovation of a mixture of waste red bricks can be used in concrete. The research method used experiments in the laboratory with normal concrete compressive strength compared to the composition of the mixture of red brick waste in the proportion of 25% and 50% based on SNI. The research objective was to find out the limits of the proportion of the design strength of normal K-200 concrete and by adding red brick waste as a fine aggregate substitute. The results of the use test with 25% and 50% of red brick waste are able to achieve the strength of the plan with reference to a normal concrete comparison so that the material is feasible as a substitute material. The addition of 50% waste is able to reach K-200 but compared to an additional 25%, there is a decrease in strength at 7 days at 16.7%, age 14 days by 20%, and age 24 days at 36.8%. Recommendation for the limit of the proportion of adding red brick waste to 25%.
Predicting the influence area of access and egress of commuter train based on survey data of travel behavior characteristics
Authors: Susanti A , Soemitro R A A , Suprayitno H 
Published: December 2019

Abstract
The main objective of this research is to predict the influence area of the SULAM Commuter Train when heading (Access) and leaving (Egress) the train station. The research method was carried out using an interview survey of SULAM commuter train passengers on weekdays in the morning departure hours (06.00-07.20) from Lamongan - Surabaya. Data on distance travel and connecting modes obtained from interview surveys are important data for calculating the influence area of the SULAM Commuter Train. The two data above are analysis gaps from the research. The influence area obtained from the Access-Egress interval, which is mostly chosen by SULAM Commuter train passengers, while data that is not widely selected can be ignored and considered as underserved territory. The value of the influence area can be viewed from each type of connection and is the renewal of this study. Planning new routes in underserved areas is a benefit of this research. Predictions about the influence area are important, given that the stretch of the commuter train service line in the city of Surabaya and its surrounding areas is still very limited.
Effect of the leakage location pattern on the speed of recovery in water supply networks
Authors: Nugroho W , Iriawan N 
Published: December 2019

Abstract
The International Water Association states that Non-Revenue Water is an efficient indicator of the performance of a water company that has been implemented internationally. The volume of water loss expressed as Non-Revenue Water at the global level shows a high number. Every year more than 32 billion m3 of treated water is lost due to leakage from the distribution network. There are four pillars in the network leakage management strategy include management of pressure, speed of recovery, active leakage control, and asset management. These components influence how leakage is managed and affect the volume and value of economic leakage - in a distribution network of water companies. The current annual volume of physical losses tends to increase along with the expansion service area of the distribution network. The rate of increase can be inhibited by the right strategy combining the four components into an effective leakage management strategy. This study analyzes the distribution pattern of leakage points in water distribution pipelines in Malang City, and how much they affect the speed of recovery. The data in this study consist of 5449 pipeline leakage points which include spatial and attributes data. The method used in this study is the Spatial Point Process. The results of the analysis show that the distribution pattern of leakage is an inhomogeneous pattern. It is found that the parameters of the model -with Euclidean distance- the leakage pattern affects the occurrence of leakage and the Geographical Weighted Regression model -with fixed Gaussian Kernel Weight Function with Manhattan distance- the leakage pattern affects the speed of recovery.
Identification of the inhibiting factors for skilled labour in the construction sector to obtain competency certification
Authors: Widiasanti I , Rochadi D , Fridestu A , Lenggogeni L 
Published: December 2019

Abstract
The purpose of competency certification can be seen from two complementary aspects, namely to assess a person’s ability and expertise in his profession and convincing the user about the competency of the labour which fulfills the requirements in carrying out the task. However, the number of construction labour certified is only about 3% of all construction labour in Indonesia. This study aims to identify inhibiting factors of competency certification in the perspective of construction labour, especially skilled labour. This study uses a quantitative model with descriptive analysis. This research was conducted on skilled labour in three high-level building projects. The method of collecting data by survey through questionnaires, observation, and literature study. The results of this study indicate several factors which interfering skilled labour to obtain competency certification: 1) the complexity of competency certification implementation, 2) The expensive cost to get the competency certification, 3) There is no difference in wages between certified labours and uncertified labours, 4) The certificate does not guarantee the work quality of labours.
Risk management maturity of the supervising consultant on quality and time performances in construction building
Authors: Suryani F , Widiasanti I , Nurjaman H N , Ramdani I J 
Published: December 2019

Abstract
Construction of buildings has a complex type of work. Detailed work does not only refer to the technical specifications and drawing plans that have been set, but there are also construction norms and work steps that need to be understood by the Supervising Consultant in achieving project objectives. There are often problems with quality and time control, so the ability to manage risk from the Supervising Consultant needs to be known and analyzed. Based on this analysis, it can be determined the level of risk maturity of the Supervising Consultant in overseeing the implementation of building construction. The purpose of this study is to obtain the maturity level of the Supervising Consultant in managing risks related to quality and time performances. This study uses descriptive analysis and Analytic Hierarchy Process (AHP) to get category in risk control. The results of the study indicate that the Enterprise Risk Maturity criteria assessor obtained maturity level 4. This means that the Supervising Consultant has a supervisory system on the implementation of risk management, the principles have been implemented and accompanied by periodic improvements in terms of control.
Soil characteristics analysis based on the unified soil classification system
Authors: Daryati D , Widiasanti I , Septiandini E , Ramadhan M A , Sambowo K A , Purnomo A 
Published: December 2019

Abstract
The purpose of this research is to determine soil classification and identify the swelling potential of soil clay in the Jababeka I (sample 1) and the Lippo Cikarang (sample 2), Indonesia. The research was carried out by the experimental method. Soil classification based on the Unified Soil Classification Systems (USCS) determined by No.200 sieve analysis and A-chart (LL vs PI chart), while based on the American Association of State Highway and Transportation Officials Soil Classification System (AASTHO), classification determined by No.200 sieve analysis, liquid limit (LL) and plasticity index (PI). The results show the soils are clay of high plasticity (CH) in determining of the USCS, whereas in AASTHO, the soils are A7-6, which means clay of high plasticity. Furthermore, the swelling potential or expansion potential of clay is determined by indirect methods namely by the results of LL, PI, SL, and percentage of the passing of sieve No.200. Moreover, consolidation test is also carried out to obtain compression coefficient (Cv) and coefficient of consolidation (Cc) to determine the mineral content. The results of this experimental research that soils contain kaolinite minerals, a very high swelling potential with the possible change in volume of 10-30 %.
Physical condition-based practice models of traditional games for children disabled elementary school age
Authors: Repiyasa I W , Tangkudung J A P , Hernawan  , Paramitha S T 
Published: December 2019

Abstract
This research has the goal of producing products such as exercise books and models in the physical condition of child disability. in this study using Borg and Gall method consists of ten steps and Research subjects are elementary students in SLB B PTN Bali. The model consists of 4 models with 40 items which have several times through the expert evaluation, testing and revision. This research uses pretest and posttest with significance level 0,05. The result of physical game exercise based on traditional game for children with disability between pretest and posttest obtained result tO = 9.595 bigger than price tt = 0.000 (at significance level 0,05), hence null hypothesis rejected. So, it can be concluded that there are significant differences between pretest and posttest results-based endurance exercise traditional games for children disabilities. Judging from the results of the physical condition of the model-based practice of traditional games for children of primary school age disabilities are effectively used to improve the results of the child’s physical condition.
Identification of supporting factors of local food products towards the global market competition
Authors: Ikhwana A , Kurniawati R , Kurniawan W A , Alinda F P 
Published: December 2019

Abstract
Local food products that have been known as icons of a region are faced with global market competition so that they are required to have competitiveness in fighting for the global market with the hope that business activities that rely on local identity are not lost and displaced by the arrival of various products that can replace product functions and roles on global competition. This study aims to identify the factors that support the sustainability of the local food product business so that it can compete in the global market and determine the strategies that must be done. To support this research activity, the method used is the analysis of factors supported by 100 respondents conducted using the accidental sampling method involving various groups of respondents. Based on the results of the study, it was found multiple factors that support the sustainability of local food product businesses, namely: lifestyle factors, individual factors, promotion factors and places, and product identity factors. Furthermore, so that the business activities of local food products can survive and be sustainable, the strategies that must be carried out are product innovation, intensive promotion, and determining a strategic sales location.
Determination of the optimal distribution centre location with gravity location model
Authors: Sanjaya A , Sembiring A C , Willyanto W 
Published: December 2019

Abstract
Distribution cost for an animal feed company in Deli Serdang is relatively difficult to reduce because the location of the distribution centre is not strategic and far from several distribution locations. The purpose of this research is to determine the optimal distribution centre location to reduce distribution costs. In determining the proposed distribution centre location, Gravity Location Model is used. The research results are the new coordinates as the proposed distribution centre location, namely (98.888504; 3.419406) and the total distribution costs of initial distribution centre location are Rp 7.135.828, while the total distribution cost of proposed distribution centre location is Rp 6.965.143. The results obtained show that the total distribution costs can be reduced by 2.39% per day.
Problem solving improvement through the teaching factory model
Authors: Subekti S , Ana A , Barliana M S , Khoerunnisa I 
Published: December 2019

Abstract
The dominance of Indonesia’s youth unemployment rate is currently occupied by vocational school graduates. The incompatibility of competencies prepared in vocational schools with the competencies needed by the labour market triggers this unemployment rate. Discussion of employability skills as a basic skill is high among human resource developers. The learning process must pay attention to the profile of labour needed so that the gap can be overcome. This study aims to measure the increase in employability skills in problem solving skills of students through teaching factory model. The study sample was 60 students from vocational schools who conducted teaching factory on bread production in West Java. Improved problem solving skills are measured based on 5 indicators, are work safety, managing facilities, making decisions, knowing how to learn, and solving problems. 37 competency units are prepared based on national work standards as a guideline for measuring students’ problem solving skills. Achievement of employability skills in problem solving skills of students in SMKN 1 Pacet is higher than SMKN 1 Cibadak, and SMKN 2 Subang. The causes of differences in the achievement of employability skills are discussed.
The bread production process using application of the Hotelling T2 control chart
Authors: Asri G S , Citra F P , Nisa S K , Lestari T E 
Published: December 2019

Abstract
Quality Control is an activity to maintain and direct to quality company product and services which can maintain the existence of the product in the long term period. Statistical Quality Control is a method of using the control charts of the cause-effect techniques and diagrams in quality control to minimize the rejected products. In this study, we used one of Statistical Quality Control methods, which is Hotelling T2 Control Chart to control the quality of bread production. Hotelling T2 Control chart is the type of multivariate control chart that is used to monitor the process of identifying the causes of variance and improve the process. In the application of the Hotelling T2 Control Chart, we used two major characteristics of quality, those are size and net. Based on the identification the number of products that fail is still within reasonable limits located between UCL and LCL. The main cause of the signal out of control is the packaging of the product. As the endeavour improvement from the company, the production process is increasing in the second phase.
The effect of addition of polymer on viscosity as fluid of industrial oil and gas injection in EOR method
Authors: Pramadika H , Samsol S , Satiyawira B 
Published: December 2019

Abstract
One EOR injection is polymer injection. In this study we will use FP3300S polymer with a concentration of 500ppm, 750ppm, 1,000ppm, 1,250ppm, 1,500ppm, 1,750ppm, 2,000ppm, 2,250ppm and 2,500ppm. The purpose and objective of this study was to determine the effect of polymer concentration on increasing viscosity, determine the effect of polymer concentration on polymer filtration (compatibility, filtration, screen factor, thermal stability), and to find out how the polymer injection results, the higher the research found. the polymer concentration the higher the viscosity where the highest at the polymer concentration 2,500ppm with 19,38cp, the viscosity required by the polymer as injection liquid is the viscosity of the polymer greater than 2X the viscosity of the oil to be injected, where the oil viscosity is 5,2pp. then while in polymer screening it was found that higher polymer concentrations were not always good for polymer filtration, and polymer injection has been shown to increase recovery factor, recovery factor was obtained at 51.5% water injection and polymer injection was 23.1%, before injection was correct really need to be screened first, to get the most optimal concentration to be injected.
Application of artificial neural network to predict permeability value of the reservoir rock
Authors: Yasmaniar G , Prakoso S , Sitaresmi R 
Published: December 2019

Abstract
Permeability is an important reservoir property but it is difficult to predict. An accurate measurement of permeability values can be obtained from core data analysis. However, this analysis is not possible to do at all interval wells in the field, so that permeability information becomes incomplete. Then, the use of artificial neural network method can be an alternative to predict the incomplete permeability values. This study used 191 of sandstone core samples from Upper Cibulakan Formation in the North West Java Basin. These core data were used to determine hydraulic flow unit (HFU) from the reservoir, and to obtain a relationship between porosity and permeability for each HFU. The application of artificial neural network method is done by building a database of flow zone indicator (FZI) based on its relationship with log data. From this FZI value, the HFU class can be known. Afterward, the permeability value can be obtained according to the equation of the relationship between porosity and permeability at each HFU that had been generated. Artificial neural network was applied on G-19 and G-11 Well that had 51 of core data. Based on this study, the result of permeability value is not much different from core data at the same depth, so that this method can be applied to obtain the permeability in uncored intervals.
Comparison of methods for calculating gas reserves in providing certainty of reserves in the oil and gas industry
Authors: Rahmawan S , Ridaliyani O , Samsol S 
Published: December 2019

Abstract
The volumetric method is the initial method used in calculating hydrocarbon reserves obtained from the exploration stage obtained geological data from a field in the oil and gas industry. The hydrocarbon reserve calculation obtained from a volumetric method is the result of interpretation data, such as seismic and logging data that have a small range of trust. In this study estimated hydrocarbon reserves in the XY formation gas reservoir using a material balance method or P/Z method in assessing optimism or pessimism of the reserve value generated from a volumetric method. The material balance method or P/Z method was chosen as a reliable method. Because it has better accuracy data such as pressure measurement data, reservoir rock, and fluid analysis data. Cumulative production measurement data compared to interpretation data on a volumetric method. From this research can be concluded that the reserve value produced by the volumetric method is more pessimistic than the reserve value using the material balance method and P/Z method. By knowing pessimism results from the volumetric backup method for the other two methods. it will affect the amount of oil and gas industry reserves so that geological model needs to be done again after more accurate data is obtained.
Construction design system of constant pressure control in water distribution system with PID method using PLC based on IoT
Authors: Syufrijal S , Rif’an M , Media’s E 
Published: December 2019

Abstract
The objective of this research is to make a constant pressure control in water supply with the method of PID using PLC Siemens S7-1200 as a controller and also to monitor the process of its work system from a distance through the internet of things (IoT). The water distribution system is created utilizing 3 phase pump which will supply water from the tank. The pressure sensor will be used as an analog input signal of PLC to detect the pressure of water in the pipe. Using inverter, water pressure will be kept constantly matched with the desired set point through the setting of pump speed using the digital PID method that is available on PLC. The score of the set point is done through HMI of touch panel KTP700basic. By using Wi-Fi communication that has been connected to the internet, PLC data can be sent to a cloud server through raspberry pi3 using the MQTT protocol. Raspberry pi3 program is designed using the java script coding language. Research result showing that this system can keep the water pressure at a constant level of 1.2 bar in the water supply. It is also able to monitor the water pressure through HMI and handphone via IoT Technology in the GoIoT server.
Flow description of gas well in basement granite reservoir from well test analysis
Authors: Oetomo H K , Sitaresmi R , Laksana D P 
Published: December 2019

Abstract
A sweet gas exploration well, penetrating 3286 feet thickness of Granite Basement with 200 feet thickness of extensive fracture was tested. Initial step was to study all geological and petrophysical aspects of reservoir and well. These data were used to obtain the sense of reservoir shape model and its fracture flow behaviour. Interpreting the log gives the presents of partial fracture and open fracture, which are shown in the early time region as a fracture dominated flow and very small wellbore storage effect. The bilinear flow before middle time region and followed by two porosity fracture model at middle time region are shown afterward. Constant pressure circle boundary is shown in the late time period. In summarized, the well flow model is in infinite acting conductivity with two porosity pseudo steady state reservoir model and constant pressure circle boundary. The permeability is 1.45 mD, with -0.52 skin and 1962 Psia reservoir pressure; meanwhile the fracture coefficient is 50 mD-ft, storativity is 0.51, and interporosity flow coefficient is 4.38x10-6 mD-ft. All well and reservoir data pertaining well test is very important for getting a reliable well test interpretation result; to get better understanding reservoir flow behaviour; in this case the reservoir is tight with expected better reservoir outside circle boundary.
Stabilization of the quality and anthocyanin in strawberry puree during storage
Authors: Mangku I G P , Rudianta I N 
Published: December 2019

Abstract
During processing and storage of strawberry products like puree were often found some problems such as loss or change of red color anthocyanin, the formation of brown pigment and loss of ascorbic acid. The purpose of this research is to determine the best of precise dextrin concentration to stabilization of red color anthocyanin pigment and the quality during storage at temperature 10±2°C for 30 days. Randomized block designed used with dextrin concentration as treatments that consists of three levels with four replications. The treatments are, dextrin concentration 0.8%, 1.6%, and 2.4%. The data were analyzed using ANOVA and continued by LSD analyzed if the treatment given significantly effect. The result showed that the treatment of dextrin 1.6% having the highest of total product value 2.27 and produced strawberry puree with the best quality during storage at temperature 10±2°C for 30 days. The characteristics of the strawberry puree are anthocyanin concentration 23.67 mg/kg, total ascorbic acid 78.12 mg/100g, total soluble solid 13.23%, moisture content 79.88%, pH 3.16, red color intensity (a* value) +30.80, degree of lightness (L* value) 35.40, and total of microbe 21.6 x 103 cell/g.