bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Utilization of Plastics Waste in Flexible Pavement Hot Rolled Sheet and Asphalt Concrete Wearing Course with Marshall Immersion and Cantabro Test
Authors: Adhitya B B , Pataras M , Kadarsa E , Nurainiyah F 
Published: May 2020

Abstract
Road was a transportation infrastructure that connect a place to the other place. Road pavement should be utilize resources efficiently, effectively and eco friendly. One important material that used for road pavement is asphalt. Plastics are very useful in daily life but the existence of plastic these day became problems to the environment especially the plastic waste. Plastic waste has negative impact for out environment because it was hard to decompose. This research was done to know the utilization of hot rolled sheet wearing course (HRS-WC) and asphalt concrete wearing course (AC-WC) mixture by using waste of plastic such as cups, plastic bags, and plastic snacks with Marshall immersion test and cantabro test. The result that can be concluded are optimum aspal content with each kind of plastics. Then Marshall Immersion test with the index of retained strength (IRS) value and cantabro test value.
The Effect of Polycarboxylate Addition Towards The Workability and High Strength Concrete
Authors: Sumiati  , Mahmuda  , Herius Andi , Subrianto Agus 
Published: May 2020

Abstract
High strength concrete will be get when using very low Water/cement ratio (W/C). The low Water/cement ratio (W/C) usually has a difficult workability. Beside, if the concrete is getting harder, it will occurred shrinkage and cracking. Fresh concrete workability can be fixed, by adding superplasticizer/polycarboxylate into the fresh concrete, controlling slump value and using graded aggregate as proper to the specification.
This study aims to get the optimal percentage of polycarboxylate that can be used to concrete with the compressive strength of 50 MPa with a good workability. The test conducted on 60 concrete samples with the diameters of 15 cm and height of 30 cm. Polycarboxylate which was added had variants of 0%; 0,5%; 1,0%; 1,5 and 2,0% to the cement weight. Before the compressive strength test, the sample was hardened and did the test after 7; 14; 21 and 28 days. According to the test result, optimal Polycarboxylate added is in the amount of 1%-1,5% to the cement weight, which means it will get the concrete with the compressive strength of 50 MPa, has good and economical workability.
The Utilization of Crushed Clay Brick as Coarse Aggregate on Eco-Green Lightweight Foamed Concrete
Authors: Sumiati  , Mahmuda  , Sukarman  , Indra Siswa , prabudi Darma 
Published: May 2020

Abstract
Lightweight Concrete has advantages in its weight, so as to minimize bending moment and mitigate earthquakes. Lightweight Concrete can be made by changing its aggregate with a lightweight aggregate or foaming the mortar, so that the concrete becomes porous and lightweight. But, porosity, density and compression strength concrete have relation. This research aims to obtain the value of density, porosity and compression strength from Lightweight foamed concrete that use crushed clay bricks as coarse aggregate.
Testing was conducted to 96 samples of concrete with diameter of 15 cm and height of 30 cm. Foam Agent added is varied 0%-3.5% to the water weight. Before compressive strength testing, the samples were first cured and tested after age 7; 14; 21 and 28 days.
From the testing result, it is obtained that crushed clay bricks can be made as coarse aggregate in eco-green lightweight concrete. If foam agent added are 2-3.5% then it is categorized as Moderate Strength Concrete, while if foam agent added is < 2% it is categorized as Structural Concrete, based on specification of Indonesian National Standard (SNI 03-3449-2002)
Plastic To Fuel Technology As Alternative Operation Of Gas Engine Sukawinatan Waste To Energy In Palembang
Authors: Fithri N , Fitriani E 
Published: May 2020

Abstract
Construction of power plant (PLTSa) which can produce energy up to 500 kWH. Sukawinatan landfill which is predicted to produce CH4 around 12 nmh3/hour in each well, with the calculation of 50 wells can produce 600 nmh3/hour. However, for the current status, it turns out that CH4 at TPA wells which able to generate up to 500 kW in volume decrease so that it can only operate with a load of 45-94 kW, therefore in 2018 PLTSa Optimization review has been carried out Sukawinatan which is a study of composition calculation waste and gas potential as a basis for consideration for the development of TPA wells including the technical design. The optimization of PLTSa Sukawinatan has not been implemented because the generating capacity has not yet received the best value due to technology that did not meet the requirements. In this study, researchers used a Descriptive Action Research methodology focused on implementing actions aimed at improving quality and providing solutions problems in the area under study. The Ministry of Energy and Mineral Resources offers an alternative use of PLTSa Sukawinatan with the addition of the Plastic to Fuel scheme as a solution for generating fuel. It is expected this research can contribute to the Government of the City of Palembang and the Palembang community as a result of the application of waste management as a source of sustainable electrical energy source of lighting for Palembang.
Geochemical Studies of Claystone Based on Analysis of Scanning Electron Microscope (SEM), Talangsawah, Merapi District and Surroundings of Lahat Regency, South Sumatra
Authors: Falisa  , Chandra Hendri , Harnani  
Published: May 2020

Abstract
Claystone formation is related to its geological condition, which is where the claystone is formed. The claystone environment is very influential on the composition that supports the formation of the claystone. The fine-sized claystone in the petrography is very difficult to determine its composition so by using the Scanning Electron Microscope (SEM-EDX) analysis it will be known the claystone environment. The purpose of this study was to determine the claystone environment based on its chemical composition. The SEM-EDX analysis showed that five samples were analyzed, claystone samples ( F-1, F-2, F-3 and F-4) consisting of calcite, halite, and siderite minerals characterizing marine environment deposits, and claystone samples ( F-5) consists of siderite, kaolinite, and pyrite minerals characterizing subaerial environmental deposits in the abandoned channel.
Biodiesel Production from Bintaro (Cerbera Manghas L) Seeds with Potassium Hydroxide as Catalyst
Authors: Zikri A. , Erlinawati  , Sutini PL , Agus M , Fathona S. 
Published: May 2020

Abstract
Biodiesel is methyl or ethyl esters which is an alternative fuel for diesel engines that is produced by chemical reaction of vegetable oil or animal fat with alcohol such as methanol. The reaction requires a catalyst that is usually a strong base, such as potassium hydroxide. The purpose of this research was to produced biodiesel from Bintaro seed with potassium hydroxide as catalyst that have quality based on Standard Biodiesel Quality (SNI 7182:2015). Degumming process is required to remove the gum and the other impurities of vegetable oil which is the raw material for biodiesel production by using weak acids, such as phosphoric acid and citric acid was studied in this research. The experiment used catalyst with concentration 0.6-1.2 % (v/v) of raw material and the result shows the highest yield of biodiesel at 0.6 %(v/v) was 87.6 %. The characterization of methyl ester from bintaro seeds has the value that fulfilled the recommendation of biodiesel standards.
Effects of Carburizing Processes on Nodular Cast Iron with Variations in Temperature, Time and Cooling System
Authors: Effendi Sairul , Firdaus  , Karmin  , Romli  , Homzah Ozkar F. , Eka Fernandes Yogi 
Published: May 2020

Abstract
Nodular Cast Iron have ductile properties when added with elements of magnesium or cerium and this will cause the ductility range of 10-20% increase, hardness and low tensile strength, easy to be formed compared to alloy steel (alloy steel) or high carbon steel (high carbon steel) and the price is relatively cheap, making this material widely used as a basic material (raw material) for the manufacture of a product. To get hard properties on the surface, this material can be carried out a surface hardness process, so that the product can be functioned according to its application. Way that can be done to increase surface hardness as well as low carbon steel strength is by adding carbon elements to the steel which is commonly known as carburizing. The carburizing process is carried out on a muffle furnace specifically heat treatment that is easy to operate in setting the heating temperature, heating speed and holding time. In this research, it is designed and carried out on low carbon steel using carburization media with a ratio of 70% activated carbon and 30%, calcium carbonate (CaCO3) at 900°C heating temperature, holding time variations of 2, 3 and 4 hours respectively, then proceed with the process cooling or double quenching. The results of this study are expected to obtain a product made with cast iron nodular material, so it can the economic value of the product.
Smart Cup Holder For Visually Impaired People
Authors: Aryanti Aryanti , Lin Wei-Cong , Lin Chih-Yi , Brian Henriquez Billy , Mekongga Ikhthison , Raymond See Aaron 
Published: May 2020

AbstractPouring hot drinks is more challenging for the visually impaired and is challenging to determine the exact level of the water inside. This paper presents the design and development of an assistive device to assist the visually impaired handle hot liquids safer. In the proposed system, a cup holder developed that measures the water level and temperature through the use of various sensors. A cup prototype was designed using CAD and printed for further testing. The team has successfully developed a working prototype that determines water level through pressure and provides a warning to the user when the water is too hot. In the future, further tests will be done to allow various types of cups on the cupholder.
Analysis of Server Virtualization Service Performance Using Citrix Xenserver
Authors: Surahmat  , Tenggono Alfred 
Published: May 2020

Abstract
Virtualization technology is a technology that allows making things into a virtual form. Server virtualization itself is a software technology that can enable physical servers to run many operating systems on a physical server. In this study, the service performance testing of Citrix Xenserver was conducted to determine the service performance of this server virtualization. The research method in this study used action research by testing the CPU load and Memory Usage, Benchmark, Network Traffic, and then the response of users by using the technology acceptance model approach. The results obtained from this study were that Citrix XenServer is able to run a virtual operating system well and also get a good user response which can be seen from the questionnaire data.
Predicting Cost Recovery Rate of Ischemic Stroke Patients: A Potential Application of Big Data Analysis in Hospital
Authors: Fahlevi Heru , Roli Ilhamsyah Putra Teuku , Suryani Oktari Rina 
Published: May 2020

Abstract
Cost controlling strategy have become a vital issue in the hospital sector, particularly after the application of a prospective payment system in many countries. This study aims to examine the determinants of the hospital patient actual cost, differences, and Cost Recovery Rate (CRR) in a referral Indonesia hospital. Besides, it also explores the potential use of the analysis result for cost management in the hospital. The population of this study was 2018 Ischemic Stroke inpatient cases (677 observations). The data was obtained from the hospital medical record department and insurance claim department. The multiple regression method is used to analyze the actual patient costs and reimbursement fees data, which is followed by semi-structured interviews with principal officers of the hospital. The interviews were conducted to assess and evaluate the potential and challenges of the big data analysis application. The result of this study indicates that the patient cost, differences, and CRR are determined by severity level and length of stay (LOS), while patient gender and age have no significant influence on the tested dependent variables. The interviews also reveal that the hospital has not used the big patient data in managing cost optimally. Based on the result of this study, the hospital can used the tested statistical model to control patient cost, evaluate the treatment and improve cost-effectiveness of patient treatment.
User Experience Analysis on Class I LPKA Palembang Filial E-School
Authors: Tri Octafian D. , Febrianty  , Hadiwijaya Hendra 
Published: May 2020

Abstract
The Class I LPKA Palembang management wishes to present academic services through the provision of systems that can better support education. Therefore, Filial e-school was built and implemented as a learning system in filial schools implemented in LPKA. The e-school system with the link address http://e-schoolfiliallpka.com/, consists of several modules: a.Video-based learning module, b.Audio-based learning module, c.Text-based learning module, d.Distance learning media, e.Giving and submission assignment media, f.Discussion media. This system facilitates the learning process of LPKA students to be able to learn independently with existing media and make it easier for teachers to deliver learning material. The system development method used in this study was the Rapid Application Development (RAD) method. Testing of user experience on the use of e-school was tested using the User Experience method with the following aspects:Perspicuity, Efficiency, Dependability, Stimulation, and Novelty. Based on the results of UEQ differences between parent schools’ teachers and LPKA students on the use of filial e-school, it was found that e-school filial gave slightly higher impressions to parent schools’ teachers compared to students. The average results of the UEQ questionnaire for all users of the e-school filial system showed that the stimulation and novelty aspects were felt to be higher than the other four aspects.
Geographic Information Systems Search Test Location For Admission Of New Students In Sriwijaya State Polytechnic Using Location Based Service (LBS) Method
Authors: Ariyanti Indri , Yusniarti  , Wahyuni Sri 
Published: May 2020

Abstract
New Student Admission Selection or in Indonesia called New Student Admission Selection (SPMB) is one of the new student admission selection tests for universities. The problem is usually found during the admission of new students because the students have come from outside the city. Another problem that could be a supervisor might make a mistake when they found the room they were late. And also the Admin is difficult to coordinate with supervisors and new students during the test. This is a geographic information system to search the test locations. This system is built using the Location Based Service (LBS) method by utilizing GPS in Maps. The system development method that is used is RUP, this system will provide the direction of the user’s mobile device access. The results of research are made in a system that can facilitate students in finding the location of exam rooms. The geographical information system in mapping is the test location for the students who are going to do the test for the test location, and make it easier for supervisors to find out the location of the new student admission selection test.
Design of Smart System to Control Energy in Idle Time
Authors: Roslina  , Amelia A , Hartama D , Fahmi N 
Published: May 2020

Abstract
This study aims to control energy consumption at idle time or outside working hours in office buildings both government and private so that there is not waste in the use of energy. To control the use of energy, an energy smart control system is developed by applying Wireless Sensor Network (WSN) and Internet of Thing (IoT) technology in order to realize energy efficient to support Smart Campus in Industrial Era 4.0. The Prototype of smart system to control energy testing was conducted at the Politeknik Negeri Medan building. The process of controlling energy consumption at idle time can be done. By controlling energy consumption at idle time office activities have an effect on saving energy.
Smart Control of Temperature and Humidity for Opak Dryer Oven
Authors: Amelia A , Roslina  , Fahmi N , Zarlis M , Sundawa B V 
Published: May 2020

Abstract
Cloudy or rainy weather will minimize the sun’s radiation to the ground. It will affect to production level of Opak by Micro, Small and Medium Enterprises (MSMEs). They do conventional drying processes using sunlight and it needs a large drying area. The drying process using an electric oven equipped with an automatic temperature detection and control system, it called the Smart COpak, is an effective and efficient method. This system will detect and control the temperature of the electric oven in accordance with the temperature of the sun so that the printed Opak container does not melt or melt. This research will contribute to the development of science and technology in the field of Telecommunications Electronics and Information Technology. Furthermore, it can help effectively for Opak producer to increase Opak production without being affected by weather conditions or the drying area. Opak production can already be done both indoors and outdoors. Finally, consumer demand can be fulfilled.
Whirlwind Classification with Imbalanced Upper Air Data Handling using SMOTE Algorithm and SVM Classifier
Authors: Novitasari D C R , Foeady A Z , Nariswari R , Asyhar A H , Ulinnuha N , Farida Y , Santi D R , Ilham  , Setiawan F 
Published: May 2020

Abstract
Whirlwind is a natural disaster that often occurs and is difficult to predict from some time before. Early identification is needed to prevent a lot of casualties and losses. Whirlwind caused by instability in the atmosphere. Instability in the atmosphere usually occurs at the beginning of the day and the whirlwind can be identified based on the upper air parameter which can represent atmospheric instability. The purpose of this research is to optimize SVM classification with SMOTE algorithm to handling problems in imbalanced data and this research can minimize casualties and losses or also be a breakthrough for disaster-prone areas to be given early warning. The process for identifying whirlwind has several stages, namely pre-processing, imbalanced data handling, and classification. Pre-processing is normalized data. Whirlwind data has a classification problem, namely inter-class data that is not balanced so it needs to be corrected using the SMOTE Algorithm. Research on the identification of whirlwind using a combination of SMOTE-SVM produces the best accuracy is 98.8 %. When compared to data without the SMOTE algorithm the results obtained are better if the SMOTE method is applied. The specificity value is also better when given the SMOTE method. Based on these results it can be concluded that SMOTE can overcome the problem of imbalanced data in the upper air data by increasing the value of the classification of the whirlwind.
Oil Palm Sorting System of Fresh Fruit Bunch (FFB) Using Forward Chaining Algorithm
Authors: Wahyuni S N , Affan R 
Published: May 2020

Abstract
Oil palm is the producer of oil and fuel. To get a good quality, it is necessary to sort the fresh oil palm fruit based on the characteristics and criteria of the type of fresh fruit bunches (FFB). This paper aims to carry out the process of sorting the oil palm fruits using the Forward Chaining algorithm to obtain superior quality oil palm fruit based on the characteristics and criteria of fresh oil palm fruit bunches. The sorting phase purpose is to shorten industrial process phase and reduce cost. This sorting mechanism will be developed as a system that can educate oil palm farmers to do sorting before the oil palm goes through the industrial process. The research method uses a forward chaining algorithm by determining 5 criteria and 39 characteristics of fresh oil palm fruit bunches with percentage value determined by using the classical probability calculation. The accuracy of this research is 100%.
Ergonomic evaluation of low-cost prosthetic products: comparison between rigid and flexible ankle joint design
Authors: Muslim K , Setiawati N L P S , Girsang K S , Yassierli  
Published: May 2020

Abstract
Disability due to an amputated leg affect people in Indonesia, including those with low to middle income categories. To facilitate them, Yayasan Difabel Mandiri manufactures a low-cost flexible ankle prosthetic to fix the shortcomings of the rigid ankle prosthetics available in the market. This experimental study aimed to evaluate the use of flexible ankle prosthetic for daily activities. Seven disabled people simulated a walking task with or without a backpack loaded with 10% of body mass using two prosthetic types (i.e., flexible and rigid ankle). Measures were obtained to evaluate the performance of the prosthetic including the center of pressure (COP) indicating static and dynamic stability and subjective ratings of prosthetic evaluation questionnaire (PEQ). Results showed a significant difference in dynamic stability between the rigid and flexible ankle prosthetic foot with a better performance indicated by the flexible ankle joint design. No differences were shown for the use of backpack. Flexible ankle further improves the quality of life of disabled people specified by 12.76% higher average rating of PEQ. In conclusion, flexible ankle joint potentially improves the design of the prosthetic foot to meet the need and comfort of disables.
Interaction of inertia and cavitation in textured hydrodynamically lubricated bearing in very low sliding velocity considering slip
Authors: Jamari J , Hilmy F , Muchammad M , Tauviqirrahman M 
Published: May 2020

Abstract
Surface texturing is becoming an effective way for increasing the performance of hydrodynamic bearings. However, introducing the texture on the lubricated sliding contact may lead to the presence of the inertia effect as well as the cavitation effect. In this study, the correlation between the inertia and the cavitation in textured bearing is investigated in terms of hydrodynamic pressure and load support. The Navier-Stokes equation based on CFD and modified Reynolds equation are applied. In addition, the use of slip condition and its effect on the performance of bearing is of particular interest. The simulations are conducted in very low sliding velocity to address the low inertia effect. The result shows that increasing inertia effect can increase the load support, but the cavitation effects is not found in the bearing pattern in which the inertia is not significant. The other interesting result concludes that slip reduces the load support, but on the other hand slip also increases the load support depending on the texture length.
Natural zeolite study as a catalyst: A case study of pyrolysis of polyethene terephthalate (PET) waste into liquid fuel
Authors: Nuryosuwito  , Soeparman S , Wijayanti W , Hamidi N 
Published: May 2020

Abstract
Plastic waste is still one of the biggest problems of environmental pollution because it is nonbiodegradable. One effort to utilize plastic waste is the process of pyrolysis of plastic waste into alternative fuels. This study aims to optimize the pyrolysis process by using local natural zeolites. Local natural zeolite is mashed with a size of 250 mesh and mixed into PET as a catalyst for the pyrolysis process. The plastic material used in this study is Polyethylene Terephthalate (PET) which was cut to 1×1 cm2 in size. The zeolite ratio used is 10% mass basis. The heating variation was set at temperatures of 250, 300 and 350 C with a heating time of 60 minutes. The results showed that the use of local natural zeolites for PET pyrolysis produced more fuel liquids, but some important physical properties related to the fuel for SI engines decreased.