bluuebunny/crossref_metadata_2025 huggingface dataset:
The Evaluation of Mechanical Rheology on Rubber Asphalt Modification
Authors: Ramdhani Fitra
Published: May 2020

Scientifically natural rubber can be used as an asphalt modifier. Natural rubber production in Indonesia is dominated by crumb rubber products. Based on the technology developed by the addition of natural rubber can improve the rheology properties of asphalt. Therefore, this research used SIR 20 crumb rubber by evaluating the mechanistic rheological properties of asphalt mixtures. The purpose of this research to analyze of effect adding crumb rubber to asphalt Pen 60/70 toward the mechanistic rheology parameters to analyze the bitumen stiffness modulus (E *) that occurs with rubber modified asphalt.In order to obtain optimum levels of addition of rubber into asphalt pen 60/70. The method of this research was carried out in two stages, the first was to make a mixture of Pen 60/70 asphalt and crumb rubber on a variation of crumb rubber content, namely 0%, 4%, 6%, 7%, 8%, 9%, 10%, and 20 % while the second is to test the mechanical rheological properties performed with a Dynamic Shear Rheometer (DSR). The results of this study indicate that the value of Bitumen Stiffness Modulus (E *) has decreased in line with the addition of SIR 20 Crumb Rubber content. The optimum level of addition of SIR 20 crumb rubber is on adding 9% of SIR 20 crumb rubber content to asphalt pen 60/70.
Influence of foam to water ratio on compressive strength of foamed mortar as the road construction material
Authors: Subrianto Agus , Amiruddin  , Ibrahim  , Sulianti Ika , Nudia  , Beladin Salsabila
Published: May 2020

The traffic load repetition gives pressure on road may cause the settlement on road embankment especially on weak soil. One of the method to solve this problem is the use of lightweight material called foamed mortar as embankment material. In this study the authors use a foam agent as an added material from a mixture of sand, cement, water to make foamed mortar that can be applied to road foundation. This research is carried out to investigate the effect of variation of foam to water on compressive strength. From the results of mortar compressive strength test with variations of 1:20, 1:25, 1:30, 1:35, 1:40, the mean of compressive strength occurs at 28 days with the following variation are 2927 kPa, 2056 kPa, 1352 kPa, 790 kPa, and 747 kPa respectively. Based on the test results, variations of 1:20, 1:25, and 1:30 have met the compressive strength required at 800 kPa, while the variations of 1:35, 1:40 are below the target.
The Effect of Addition of High-Density Polyethylene (HDPE) as Binder on Hebel Light Brick (celcon)
Authors: Silviyati Idha , Zubaidah Nyayu , Amin Jaksen M. , Supraptiah Endang , Dwi Utami Rizka , Ramadhan Iqbal
Published: May 2020

Plastic is one of the polymer materials that is widely used in daily lives, one of them is High-Density Poly Ethylene (HDPE) polymer which is the one type of the large contributors to plastic waste, and also believed to cause environmental and health problems. One of the advanced materials is lightweight brick which has become an innovation in building materials. Lightweight Hebel brick (celcon) is an infrastructure product that is widely used on this day. This study is entitled High-Density Poly Ethylene (HDPE) Polymers as Binders in Lightweight Hebel Bricks (Celcon). Referring to the research master plan of the Sriwijaya State Polytechnic namely appropriate technological and industrial innovation and technology development of mining products. In this study utilizing High-Density Poly Ethylene (HDPE) polymers as Binder and Portland Cement type I and silica Sand as Filler, in the process of making Lightweight Hebel Bricks (Celcon). The comparison of the Filler and Binder are 30:70, 40:60, 50:50, 60:40, 70:30 in %wt. Sample testing is done by testing the compressive strength, analyzing water absorption, density, and SEM & EDX. This research shows that the compressive strength produced is included in quality I and quality III according to SNI 03-0349-1989 which in the variation of filler sample A has a compressive strength of 224.67 kg/cm2 and variation of filler sample B is 40, 45 kg/cm2. The value of water absorption produced is also still below the maximum limit, which is 25% which in the variation of sample A filler is 0.97% and the variation of filler sample B is 2.42%. The density values obtained are included in the medium density for filler variation of sample A, which is 900 kg/m3 and high density for variation of filler sample B, which by 1800 kg/m3. SEM-EDX analysis results showed that sample A has more porosity when compared to variations of sample B filler. In terms of economic analysis, the advantage of using plastic as material in making Hebel bricks is the cost of making it economically due to the presence of plastic that is easily found.
The Effect of Cracking Temperature from a Mixture of HDPE and LDPE type Plastic Waste using Zeolite Catalyst on the Quality of Liquid Fuel Products
Authors: Coniwanti Pamilia , Nur Sakinah Indira , Hadiah Fitri , Unzillah Kendari Putri Farra , Muin Roosdiana , Robinsyah
Published: May 2020

In November 2017, Indonesia was recorded as number two of the most plastic waste producing country in the world, as much as 187.2 million ton plastic waste. Several type of plastic which is often used and turns into waste after usage are HDPE and LDPE. As a way to reuse the plastic waste, it can be converted to fuel through a cracking process by pyrolysis method using activated zeolite as the catalyst. This research has the variation of the raw material ratio (%HDPE:%LDPE) such as 0:100, 30:70, 50:50, 70:30, and 100:0, also the variation of cracking temperature such as 300°C, 350°C, 400°C, and 450°C. The optimum result in this research is cracking product with raw material ratio 70:30 and cracking temperature 400°C with yield value 83 ml and the characteristics of the product are viscosity with value of 1.15735 mm2/s, gross heat with value of 10,280.872 cal/gr, density with the value of 0.77017 gr/ml, and flash point with value of 31.5°C. The pyrolysis product analysed by using GC-MS method and the result shows the dominant composition in the fuel is in the range of C8-C20 and by using F-TIR method the result shows obtained the largest compound C-H (alkane).
Technique automatic for detection and segmentation of optic disc area in retinal image
Authors: Erwin  , Cania B , Larasati I K
Published: May 2020

Optic disc (OD) is a part that must be observed in diagnosing retinal disease. In this paper an approach will be proposed for segmentation and detection of the OD area. Segmentation and detection are important steps in detecting a retinal disease automatically. Segmentation in this study was carried out using the Luminance Channel and Active Contours method, and for OD area detection was carried out using the Averaging Filter method and Image Histogram. Before segmenting and detecting the OD area begins with pre-processing as an increase in image quality and eliminating blood vessels. The detection results obtained an accuracy of 90% and 97.50% using the STARE and DRIVE dataset, while segmentation uses the DRIVE dataset with the acquisition of PSNR of 19.705 dB, accuracy of 86.45%, sensitivity 100% and specificity is 85.175%. The results of the research obtained can be used as a further step in diagnosing retinal disease.
New techniques for segmentation and extraction retinal blood vessels
Authors: Erwin  , Rohman A , Nurjanah L A , Yurika  , Sinta D , Al’afwa Q
Published: May 2020

Blood vessels are one of the important organs in the retina that can be used to diagnose various diseases. We research blood vessel segmentation and extraction with various methods in the STARE and DRIVE dataset. The methods we use are adaptive thresholding, otsu thresholding, isodata, fuzzy c means, and bradley threshold. The parameters we use as a result of comparison are accuracy, sensitivity, and specificity. The best results of accuracy, sensitivity, and specificity in the STARE dataset were 93.66%, 92.62%, and 96.85%, respectively. The best results of the DRIVE dataset are 95.96%, 90.37%, and 98.36%, respectively.
Optimization of City Bus Routes in Surabaya Using Memetic Algorithm as a Solution to Solve Orienteering Problem
Authors: Rakhmad Firdausi Fauzi , Djunaidy Arif , Muklason Ahmad
Published: May 2020

The city of Surabaya is the largest metropolitan city in East Java and has a variety of tourist attractions that can be visited, such as shopping centres, theme parks, monuments, museums and historical places. As the second largest city in Indonesia, Surabaya has not escaped from traffic jams. Congestion is aggravated by the number of tourists out of town visiting the city of Surabaya using private vehicles. The Surabaya City Government seeks various ways to reduce traffic congestion, such as improving public transportation facilities and services in the city of Surabaya and increasing public awareness of the importance of using public transportation. To support this, a service is made that aims to optimize the selection of travel routes to various tourist objects in accordance with the time availability of tourists. In this research, the selection of city bus lines is seen as orienteering problem (OP). The city bus line used is as many as 10 routes. To find the optimal solution, Memetic Algorithm is used as a form of development of Genetic Algorithms. The addition of local search in Memetic Algorithms aims to find optimal solutions more efficiently. The local search algorithm that will be used is Hill Climbing and Simulated Annealing. Completion of OP problems is implemented using the Java programming language by comparing the results of the completion of three algorithms used, namely Genetic Algorithm (GA), Hill Climbing Memetic Algorithm (HCMA), and Simulated Annealing Memetic Algorithm (SAMA) using the best parameters of each algorithm. The results of the trial show that SAMA can provide the best fitness value solutions from HCMA and GA. So that SAMA can be said to be very feasible to be used to solve the OP problems in determining the optimal path using public transportation for city buses in Surabaya.
Mobile Android Based Geographic Information System (GIS) Software Development for Tourist Destination Seekers in Palembang City Using Rasch Model Measurements
Authors: Rudi Sanjaya M. , Saputra Ariansyah , Wijaya Putra Bayu , Azhar Iman Saladin B
Published: May 2020

Rapid change and growth of technology such as automatization and computerization in many types of business according to information technology communities and practitioners are demanding us to be well-prepared in facing the evolution like mobile devices especially android. Android is a mobile operating system used for touch screen based smart phones and computer tablets. The strength of GPS based android devices is in making it easy for users to access many kinds of information of tourist destinations consisting all facilities around the places. The development of this android based application is using Java Android programming language and designed by using RUP (Rational Unified Process) as the development method with Unified Modelling Language (UML) concept. The purpose of this research is to produce a Geographic Application for tourist guidance in Palembang city containing tourist objects list, public places list, transportations list, culinary places list and also other features that will help tourists to find the most effective and efficient tourist destinations. The Rasch Model measurements uses 74 respondents, to test the data using the Rasch Model measurements with the Ministep application. In the aspect of reliability, for person reliability the value is 0.89.0.90, producing a very good value. While for reliability items the value is 0.82 and 0.84 produces a good value. while the Cronbach alpha index also produces a Cronbach Alpha value yields a value of 0.93 (produces a very good value). Determination of sample size uses the Item Measure table based on the accuracy of confidence measurements (95%).
Animation Design as an Educational Media of Adolescents’ Social Behavior Deviation
Authors: Aprianto Heki , Saputro Alan
Published: May 2020

Educational media is media that functions to convey certain information with the aim of conveying certain intentions to the target or intended user. Educational media can be developed in various ways including by utilizing website technology, mobile to make animated films. The positive benefits of animation technology can help in building a media for education of social deviation for various groups of teenagers. It is expected that the role of adolescents as the future generation of the nation’s youth will have to overcome this problem. The purpose of this study is to design animation as an educational medium for social education deviations in adolescents. This research uses a qualitative method, which focuses on developing the concept of animation that is built. The steps taken are the pre-production stage in the design of animated films starting from the initial idea of the story, concept, character design, and storyboard. The results of this study are the results of making animation media on social interaction deviations in adolescents.
Engine replacement scheduling optimization using Data Mining
Authors: Farizal  , Joelian Albert
Published: May 2020

Engine overhaul activity in heavy duty equipment takes long shutdown duration, while unscheduled replacement is impacted on process delay, increasing man power cost, and production loss. One main cause of these problems is the scheduling performed just based on mechanics’ intuition and experience. On the other side, condition monitoring data are available in a large number. Reliable data processing methods are needed to disclose hidden information from the data. For the purpose, this research used three data mining methods on condition monitoring data and external factors of heavy equipment engine to get an optimized engine replacement scheduling. Clustering method was used to classify condition monitoring data, association rule was used to analyze the interrelationship between variables and time series analysis was used to predict the value of condition monitoring. The result showed that data mining methods can be used to perform scheduling optimization. Unscheduled replacement engine or engine failed in service was reduced from 31% to 13%.
Inventory Of Goods Data Processing Using The Economic Order Quantity (Eoq) Method
Authors: Meileni Hetty , Juniansyah Putra Diky , Apriyanti Desi , Satriadi Indra , Oktapriandi Sony
Published: May 2020

Sriwijaya State Polytechnic (Polsri) which is one of the State Education Institutions in South Sumatra has Diploma III and Diploma IV programs. Currently, it has 23 Study Programs from 9 majors both in the engineering and non-engineering fields. The demand for tools and materials to support activities in each department, the Center and Technical Implementation Unit (UPT) is done manually, where the department administration department records the needs needed by the department known by the head of the department. Utilize the data processing system using the EOQ method facilitates the processing of inventory data. To overcome problems in the management of goods data in the warehouse such as running out of stock when a request appears from the Department, Central, and UPT. Data processing that has been computerized takes place so it can be stored properly and easily managed. The result of this research is web-based on an inventory of goods data processing using the economic order quantity method.
Implementation of Parking Portal Door Security System Using RFID and Password Based on Microcontrollers in Sriwijaya State Polytechnic
Authors: Widodo Slamet , Miftakhul Amin M. , Sutrisman Adi , Cofriyanti Ervri , Maulani Puji R
Published: May 2020

At present the parking system on the Sriwijaya State Polytechnic campus still uses a manual parking system, where the process of entering and exiting the vehicle is still regulated by the information security personnel regarding parking arrangements using slow handy talky communication, thus requiring the officers to communicate alternately in order to get information. The problem of parking is traffic jam and uncontrolled in the parking lot of Sriwijaya State Polytechnic. And there is no automatic parking system. This research will be made a parking portal system using hardware and software design methods to regulate parking. Automatic portal work system that can open and close when inputting the vehicle registration number via the keypad using the Arduino Mega2560 microcontroller produces an output that can move the motor power window through the VNH2SP30 driver speaker output through the Mini DF player and using a LAN network (local Area Network) as a data transfer media to the server parking database. Where when a motorist who enters through the doorstop (portal) has attached a Radio Frequency Identification (RFID) card, then the driver data that has been pasted the card will be input into the information system application that is monitored by the admin. to monitor the parking area in the Department of Computer Engineering using a Webcam which can assist in monitoring the safety of vehicles that are parking.
Room Door Security System Using Microcontroller-Based On E-KTP
Authors: Novi Tompunu Alan , Mirza Yulian , Azwardi
Published: May 2020

the purpose of this research is to make hardware and software that can be used as a security system to enter a room using e-KTP and SMS Gateway as an entry access using RFID technology at a low cost and easy to use. This tool uses an RFID sensor to read the e-KTP ID number, while a driver open and close the door lock using a relay driver with the output using the door lock solenoid. Arduino microcontroller is used as a data processor from RFID and SIM900A for sending SMS gateway. The workings of this system are the e-KTP used is affixed to RFID, if the E-KTP ID number is correct then the system will open the door and if it is wrong three times in a row the alarm will be actively followed by sending SMS information to the user. By sending an SMS to the destination number via SIM900A as a sign there is information the door has been opened from an unknown person. The results of testing the system and this tool obtained the ability of the E-KTP distance with the reader obtained a maximum distance of up to 2 cm and SMS communication between SIM900A and mobile phones have an average delay of 5 seconds.
Optimization Small And Medium Businesses Implementing And Using The Online System In Palembang City
Authors: Meileni Hetty , Indah Pratiwi Cindy , Meiriska Ienda , Oktapriandi Sony , Kom M. , Apriyanty Desi
Published: May 2020

The primary concern of this research is to solve the problem in Palembang City. It is mainly about the dissuade sales container for small and medium busineses. As a good solution, it requires an information system for every transaction in small and medium businesses to support the improvement of the sales system in the Industry ERA 4.0. It claims that this information system may benefit the business sector such as facilitate the seller in selling the product through Lapak and also facilitate the buyer in purchasing products of Palembang without being present to the store. The data is collected based on direct observation of activities related to informatics learning. This project provided an important opportunity to advance the understanding of the information system of small and medium businesses in Palembang city.
Designing Mobile Based User Interface for Promotion of Lakeur Craft Art Application at Balaputra Dewa State Museum
Authors: Syahrul Yasermi , Hari Pertiwi Dini
Published: May 2020

Applications that use mobile devices are growing rapidly in accordance with the needs and fashion of a society that continues to grow. Many conveniences and benefits are felt if an agency or institution has a mobile-based application, among others is the ease of obtaining information and the latest data from the agency or institution. Museum Balaputra Dewa Palembang is one of the museums that must develop themselves to follow the development of mobile technology that is growing rapidly, which must be able to present information that is more easily accessible by the community not only in Palembang but throughout Indonesia. The User Interface for the promotion of lakeur arts and crafts at the Balaputra Dewa Museum was created using the Task Centered System Design (TCSD) method, which has several stages, namely creating planning flow, storyboard analysis, conceptual analysis of models, paper prototyping analysis and mock-up design. This stage is the basis of a user interface design in an application.
The Design Of The Semester Exam Scheduling Application At The State Polytechnic Of Sriwijaya
Authors: Novita Nita , Aris Ganiardi M , Ariyanti Indri , Khairunnisa Delta
Published: May 2020

Scheduling a semester exam at Sriwijaya State Polytechnic is an activity that is always done at the end of each semester. To meet the needs of preparing for the semester exam schedule requires special time and attention so that the exam schedule can be arranged properly. Preparing the semester exam scheduling will be better by using a computer application, so that the leadership and administration can more easily arrange the semester exam scheduling. In addition students and examiners can find out the exam schedule that must be done through the application. But the semester exam scheduling application is not yet available at educational institutions. Before building a good semester exam scheduling application requires a semester exam scheduling application design, so this design can meet all the needs needed when building an application. For this reason, this study aims to build the design of semester exam scheduling applications that can be used by admins, leaders, students and supervisors.
Information System Strategy Planning in The Private Universities of South Sumatera
Authors: Agustri Suzan , Indra Sensuse Dana
Published: May 2020

Private Universities in South Sumatra Province currently use information systems and information technology in their business processes, but the use of these technologies has not been optimal, resulting in not achieving competitive advantage in running business processes. In this research, the Information System Strategic Planning will be formulated to be implemented in PTS South Sumatra Province with a case study at the Indo Global Mandiri University (UIGM) Palembang. The Information System Strategic Plan that is compiled is oriented to the vision and mission of the organization to align information systems and information technology with the business strategy that is carried out. The Information System Strategic Plan applies the Price Waterhouse Cooper framework, so that this research produces the Strategic Plan Information System in the form of a portfolio of future applications to meet the needs of Private University information systems. The Information System Strategic Plan is expected to be included in the formulation of a business strategic plan so that it can solve the problems faced by Private University.
Performance of RUS and SMOTE Method on Twitter Spam Data Using Random Forest
Authors: Ubaya Huda , Siti Juairiah Ria
Published: May 2020

Spam data on Twitter has one problem, which is imbalanced data. This study proposes two resampling methods, namely RUS and SMOTE as one way to balance the data. In RUS, the data becomes less because random data is deleted while the data on SMOTE will be even greater because synthetic data is grown. To measure the impact of these two methods on the dataset, the Random Forest Classifier method will be applied. In the results, RUS and SMOTE can increase the value of the Area under Curve to 95.21% and 99.13%. The best performance is obtained when applying a balanced ratio of SMOTE.
Analysis of Classifier Performance on ECG Interpretation for Precision Medicine: Which performance metrics should we use?
Authors: Darmawahyuni A , Nurmaini S , Naufal Rachmatullah M
Published: May 2020

In Indonesia, the prevalence of cardiac disease diagnosed by doctors and symptoms higher in rural areas and in the lowest ownership index quintiles. Software engineering based on deep learning techniques makes technology-based updates dynamically evolve for health care, especially in interpreting cardiac abnormalities. Electrocardiogram (ECG) is still one of the reliable cardiac examination tools. ECG is one source of medical big data collected, in addition to electronic health records (EHR), biomarker data, medical imaging, biometric data, etc. Medical big data will be processed for decision making to assign a diagnosis among several possible patients diagnose. The quality of a decision support system to interpret actual patient conditions is determined by how accurately the system is able to represent the diagnosis by experts. Some analytical targets of medical big data are prediction (classification). In classification, the performance classifiers can be evaluated by various performance metrics tested in a set of tests or independent validation sets. Performance metrics are used for helping the researchers interested in biomedical engineering to evaluate the performance of classifiers. Multivariate and imbalanced data are major problems in evaluating the performance. Therefore, in this paper discuss the performance metrics that used to minimize the bias of the classifier performance in ECG for enhancing the quality of diagnoses of cardiac abnormality in rural health care. This paper uses Deep Learning technique to show the results of performance metrics for ECG interpretation in classifying cardiac abnormalities.
Design of Low Cost Pulse Oximetry Based on Raspberry Pi
Authors: Bakhri S , Rosiana E , Saputra R C
Published: May 2020

Pulse Oximetry is a non-invasive method for monitoring blood oxygen saturation. The oxygen saturation in blood is expressed in percentage of saturation of total hemoglobin (SpO2). This method utilizes the different wavelengths of red light (660 nm) and infrared light (940 nm) captured by the light sensor after passing through vessels and capillaries at the tip of the index finger. In this study a red and infrared LED that is directed to the fingertips and light passing through the blood vessels captured by photodiode are utilized. The signal from the photodiode is sent to Raspberry pi and processed to get a percentage of oxygen saturation in the blood. This paper presents the comparability of the produced prototype with the commercial standard equipment. It was also demonstrated that the error accuracy is relatively comparable with commercial one while the price are relatively lower.
Merging of IoT and WSN for Real-Time Air Condition Monitoring Systems Towards Medan Smart City
Authors: Amelia A , Fahmi N , Roslina  , Mzarlis  , Sudawa BV , Sirait R , Zumhari
Published: May 2020

Lots use of motorbike and car vehicles, industrial gas disposal, ciga-rette smoke and also forest fires cause high levels of air pollution in the city of Medan, North Sumatra, Indonesia. Based on these problems, an air condition monitoring device was built with the concept of low cost and low power, with a wireless sensor network (WSN) architecture from end device hardware, data col-lecting, data processing in gateway, and data visualization. IRIS hardware plat-forms are used in this system, whereas the communication between base station and gateway via internet networking. Therefore, people can monitor the air condi-tion results by real-time through a website-based application or an android smartphone.
Planar Dipole Array Antenna Design for Mobile Robot Communications at 5.6 GHz
Authors: Muhsin M , Hadiansyah W M , Saharani A , Utami I R , Srihadi P D
Published: May 2020

Mobile robot communications are important in mobile robot systems, especially robot teamwork. Reliable communications are important for data transmission and control. Beamforming can improve communications performance to improve system’s reliability. This paper proposed beamforming array antenna at 5.6 GHz with 4 planar dipole elements. These antennas are arranged on azimuth plane. We conduct computer simulation of antenna design and beamforming scenarios. Beamforming is made by controlling power and phase of each antennas. We found that the designed antenna is suitable for beamforming at azimuth plane. It is confirmed by computer simulation of phased array antenna. The antenna has 1.3538 GHz bandwidth and more than 6 dB main lobe magnitude.
Weather Parameters Forecasting as Variables for Rainfall Prediction using Adaptive Neuro Fuzzy Inference System (ANFIS) and Support Vector Regression (SVR)
Authors: Novitasari D C R , Rohayani H , Suwanto  , Arnita  , Rico  , Junaidi R , Setyowati Rr D N , Pramulya R , Setiawan F
Published: May 2020

The weather anomaly phenomenon that occurs can have some negative impact such as flooding, floods will paralyze the economic activities of the community, transportation activities, damage public infrastructure. In this research forecasting weather parameters as a variable for predicting the amount of rainfall using the ANFIS method and Support Vector Regression (SVR) with the aim to provide information on future weather conditions quickly and accurately. The people can prepare themselves and prepare the equipment needed to deal with it. Rainfall predicted based on synop data such us relative humidity, wind, and temperature. Each parameters must forcasted by using ANFIS and the result used for predict rainfall. Accurate prediction calculated using MSE and RMSE. Predictions of parameters that affect rainfall using the ANFIS method shown that for wind speed predictions having RMSE of 1.975004, temperature predictions have RMSE of 0.742332, and predictions of relative humidity have RMSE of 3.871590. Predicted rainfall based on the data results of the nearest method pre-processing using the Support Vector Regression (SVR) method produces an MSE error value of 0.0928.
Application of Fuzzy Logic to Electrical Protection Devices
Authors: Kurniawan A C , Afandi A N , Sendari S , Wibawa A P , Fadlika I
Published: May 2020

The amount of electricity used is followed by the magnitude of the risk of disasters caused by power disruptions. In general, PLN as the manager of electricity distribution has provided standard protection for users, but it has not provided good protection from disasters due to disturbances, because in general the protection is specific to one type of disturbance, and the cause of the disturbance cannot be known through protection devices provided. Therefore we need a smarter electrical protection device by applying fuzzy logic to the protection device. Fuzzy on this protection device aims as a decision support system to show the condition of the electricity network based on the parameters of voltage, current, and temperature of the cable. The results of fuzzy logic in the form of a hazard level with a range of 1-10 which is divided into 3 status states, namely safe, alert, and hazardous, which in danger conditions the protective device will cut off the electricity so as not to damage electronic devices. Besides that, from the results of fuzzification, the parameters measured can be known to cause interference.
An Analysis of Imperceptibility and Robustness Performance in CRT Image Watermarking based on Color Space Theory
Authors: Handoko L B , Utariyanto  , Setiadi D R I M , Rachmawanto E H , Sari C A , Ali R R
Published: May 2020

Color images have more information and more storage space than gray images. The process of computing color images is also more complex compared to gray images. Nevertheless, human vision is more sensitive to color images compared to gray images, so color image processing is so important. Image watermarking is a method of copyright protection by embedding copyrights in the image. The embedding process can cause changes in the pixel value of the image, so it needs to be analyzed and measured the quality of watermarked images both visually or imperceptibility and watermark durability. In general, color images use the RGB color space model and color space conversion is not done when embedding watermarking. But several studies have suggested converting RGB color space to YCbCr color space for a specific purpose. This research proposes to analyze the robustness and imperceptibility performance in the R, G, B and Y color spaces in the CRT method. CRT is one of the methods of image watermarking in the spatial domain, where this method was previously also used as a cryptographic algorithm. So that the CRT method excels in durability and security watermarks. Based on the results of testing with the CRT method, the color space R has an advantage in the aspect of imperceptibility compared to other color spaces, the difference is very thin with the G and B color spaces, but when compared with the Y color space the difference reaches 3dB based on the PSNR calculation. But for testing the robustness of the color space Y is far superior compared to other color spaces even though extraction without attack, not all watermarks can be extracted perfectly.
Fanaticism Category Generation Using Tree-Based Machine Learning Method
Authors: Aribowo A S , Basiron H , Herman N S , Khomsah S
Published: May 2020

This research has produced categorization of political fanaticism on social media. The results of this study divide political fanaticism into 4 categories: positive, neutral, negative and very negative. The background of the research is that currently social media cannot recognize the elements of fanaticism and does not care about the spread of negative fanaticism. One of the best solutions to prevent the spread of negative fanaticism on social media is to develop a computer system which is able to recognize, categorize fanaticism and reject the entry of negative fanaticism. This research extracts features of sentiment, emotions, and expressions of hatred in opinions on social media. The results of the feature extraction are then processed into knowledge using tree-based machine learning methods, namely Random Forest and ID3. The validation result shows that the knowledge generated by the Random Forest process outperforms other techniques with an accuracy of 91.82%. Knowledge from the Random Forest can be used to categorize fanatical texts based on sentiment, emotion and hatred in further research
Enhancing the reinforcing efficiency of silica on styrenebutadiene rubber through the use of palmitamide
Authors: Surya I , Ginting M
Published: May 2020

In this paper, enhancing the reinforcing efficiency of silica on styrene-butadiene rubber (SBR) compounds through the use of palmitamide was carried-out. The palmitamide was laboratory prepared from palmitic acid and urea and loaded into the silica-filled SBR compounds at 1, 3, 5 and 7 phr. It was found that palmitamide exhibited modulus and tensile strength enhancements; the tensile modulus at 100% and tensile strength were enhanced, especially up to a three phr of palmitamide concentration. It was revealed that the modulus and tensile enhancements were attributed to the enhancing of reinforcing efficiency of silica on the SBR through the use of palmitamide as a curative and plasticizing rubber chemical which increased the degree of silica dispersion, interactions SBR to silica as well as cure state. From scanning electron microscopy (SEM) or morphology test, it was proved that the SEM image of silica-filled vulcanizates with 3 phr of palmitamide exhibited the greatest matrix tearing lines that indicated the greatest degree of filler dispersion and interactions between SBR to silica.
Performance of mini air cooler on parked car under direct sunlight
Authors: Setiyo M , Waluyo B , Widodo N , Rochman M L , Raharja I B
Published: May 2020

Solar radiation causes excessive temperatures in the cabin of a car parked in direct sunlight. Excess temperatures can accelerate damage to interior compartments, increase the evaporation of benzene from interior components, and increase the AC load when the vehicle starts. Therefore, this article presents the results of an investigation on the energy conversion of solar cells mounted on the car roof to activate electric blowers (mini air cooler). Two Nissan Grand Livina with and without mini air cooler is placed in areas exposed under direct sunlight. Then, the temperature data is sent and processed with DAQ master. The results showed the mini air cooler was able to reduce the cabin temperature to 6°C.
Residual velocity and kinetic energy of the ballistic simulations test on hardened medium carbon steel plate
Authors: Purwanto H , Dzulfikar M , Tauviqirrahman M , Syafaat I , Arifin M
Published: May 2020

Ballistics testing is the study of collision phenomena between projectiles and target material. Simulation with finite element is one alternative to ballistic testing that can provide detailed numerical data and specific. Validated simulations can be used as a reference for improving projectile resistant material in addition to the results of experiments test. These papers presents the effect of austenization temperature and quench media in the S45C steel plate on the residual velocity of the projectile and kinetic energy after being fired blunt projectile at a speed of 303.5 m/s with simulation base on finite element. Material data was obtained from the results of an experimental test of S45C steel plate thickness 8 mm which was austenization at 700, 800, 900°C which was quenched in water and oil media. Validation of simulations is carried out with past research. The simulation results show that the steel plate is austenization 900°C with treatment on the quench oil media can withstand the projectile better, with a projectile residual velocity of 234.46 m/s, with projectile kinetic energy of 1346.8 Joule.
Design and simulation of mixer insulators to improve turbulence in intake manifold
Authors: Sunaryo  , Irfan A , Setiyo M , Amin N
Published: May 2020

This article presents an analysis of mixer insulators on the gasoline engine to find the most optimal design. A standard insulator has been redesigned by adding a scrambler of air flow placed in the intake manifold. Simulations are carried out on 10 variations, which include standard insulators, 5, 7, and 9 angled insulators which have slopes of 30°, 45° and 60°, and have a thickness of 5 mm. Each model was analysed using Computing Fluid Dynamic (CFD), with parameters of air velocity 10 m/sec and air pressure 101325 Pa. Simulation results show that mixer insulators with a thickness of 5 mm, 5 blades with a 45° slope angle produce the best turbulence intensity. Meanwhile, another design with a thickness of 5 mm, 9 blades with an angle of 60° slope angle produce the best effect to increase air velocity.
Inertia and slip effect on a single textured hydrodynamic thrust bearing using CFD methods
Authors: Muchammad M , Triandani O , Tauviqirrahman M , Hilmy F , Jamari J
Published: May 2020

Increasing bearing performance in load support can be done by adding texture and artificial slip on one of the bearing surfaces. In this paper, a study is presented on fluid inertia and slip effect on the performance of textured hydrodynamic thrust bearings in load support by considering both cavitation and without cavitation. The results obtained indicate that cavitation needs to be considered in the bearing analysis. Moreover, the greater the fluid inertia force is, the less load support will be produced in a slip condition, but in a no-slip condition, adding artificial slip can increase the load support in thrust bearings at a certain sliding speed.
Fuel control system modeling for LPG fueled engine using Adaptive Neuro-Fuzzy Inference Systems (ANFIS)
Authors: Munahar S , Setiyo M , Purnomo B C , Rifangi Y
Published: May 2020

LPG is an alternative fuel for gasoline engines that have almost all basic properties, such as energy content, octane number, automatic ignition temperature, flame speed, and flammability limits. The CO, CO2, HC, and NOx emissions produced by LPG engines are lower than current gasoline engines. However, LPG vehicles with first generation LPG kits (vaporizer and mixer) generally waste fuel during deceleration. Therefore, this study develops fuel control during deceleration with Adaptive Neuro-Fuzzy Inference Systems (ANFIS). Simulation results show that the controller is able to provide a more realistic picture of the dynamics of AFR during deceleration. In conclusion, ANFIS is very promising to be implemented as an AFR controller in LPG-fueled vehicles.
Improvement of methane composition utilizing activated carbon adsorption column for biogas purification from food waste
Authors: Lestari S , Sriana T , Raharjo M S , Sudiarte I N , Anugrah M N
Published: May 2020

One of the potential candidates to produce biogas is food waste. The main composition in biogas are methane which has calorific value and carbon dioxide which has no calorific value. To increase calorific value of biogas, a purification process needed by removing carbon dioxide content. In this study, coconut shell charcoal is applied as activated carbon. The different flow rates of biogas entered into adsorption column are investigated. It was found that the optimum flow rate is 2 l/min to increase methane from 90.20 to 98.14%.
Design of sustainable production performance systems for MSMEs creative industry sub sector
Authors: Radyanto M R , Hayati E N
Published: May 2020

Business resilience for Micro, Small and Medium Enterprises (MSME) of Indonesia creative industry sub-sector is evident when it was able to survive when the economic crisis hit the world a few decades ago. Currently this sub-sector as one of the largest foreign exchange earners for the country. These, MSMEs have some weaknesses due to the limited ability of Human Resources (HR) in managing their business. From the available data, it is known that around 65% MSMEs in Central Java have several workers around 1 to 3 people, they only focus their work on production aspects so that they are less focus on other aspects such as financial, legality, marketing, and even product quality. This study aims to create a new model to help MSME run their business by involving 6 elements named HexaCyclus Spiral. This Performance Management System-based model would be facilitating business owners in taking action to improve their business on a sustainable basis if a decline in business performance is found. So that the model that consists of seven key performance indicators was expected to increase the performance of business products with a reporting system based on weekly to annual supplemented with a business early warning system.
The characteristic of bio-pellet made from teak wood waste due to the influence of variations in material composition and compaction pressure
Authors: Iskandar N , Sulardjaka S , Munadi M , Nugroho S , Nidhom A S , Fitriyana D F
Published: May 2020

Central Java and East Java are provinces in Indonesia which have the largest area of teak forest where management is in PERHUTANI. Teak trees can be cut down after reaching the age of 10 years or meet the minimum stem diameter required. Utilization of teak wood for the needs of building materials and furniture is very high because the material is of good quality. In processing teak tree trunks, there is waste from cutting that has not been maximized by PERHUTANI. With good quality teak wood, try to learn about the utilization of PERHUTANI teak wood waste powder for use as a bio-pellet that is included in the Renewable Energy (EBT) category so that they can improve their use and economic functions value. The bio-pellet quality reference standard refers to the SNI 8021:2014 standard. To make bio-pellets, flat die mill type machines are used with speeds of 1660 rpm. As an adhesive used cassava starch with a variation of 5%; 10%; 15% and water variations 10%; 15%; 20% by weight teak wood dust. Compaction pressure variations are obtained by adjusting the gap between the roller and die in the 0.5mm, 1mm and 1.5mm die holes. In research conducted content contained in teak wood pellets can meet SNI product standards. The five SNI standards obtained were bio-pellets having calorific values greater than 4000 calories/gram, bound carbon values ≥ 14%. Volatile matter content is less than ≤ 80%, ash content ≤ 1.5% and has a density of ≥ 0.8. This shows that bio-pellets from teak wood waste can be used for rural communities and can be developed for industrial purposes.
Effect of pressure and welding time on physical and mechanical properties of dissimilar metal AISI 316 austenitic stainless steel and AISI 4140 alloy steel joints using friction welding
Authors: Margono B , Haikal  , Atmaja H I , Wibowo J , Alfayed A , Rananto R F
Published: May 2020

Friction welding is one of the solid-state welding processes that is capable of producing high quality joints for dissimilar materials. This study aims to determine the effect of pressure and welding time on the physical and mechanical properties of friction welding joints of AISI 316 and AISI 4140. The physical are microstructure on interface joint and dimension of flash was investigated. The variation of friction pressure used is 50 kg/cm2, 70 kg/cm2 and 90 kg/cm2, while the time variations used are 35 seconds, 50 seconds and 65 seconds. The results of this study indicate that the greater the friction pressure and friction time applied, the greater the tensile strength achieved is 381.50 N/mm2. The effect of increasing friction pressure variations can reduce the value of weld joint hardness, but conversely if the friction time increases, the hardness value in the weld joint area will also increase. It was proven that in the variation of the minimum friction pressure the hardness achieved was 530.5 VHN but the maximum friction pressure variation only reached 352.2 VHN. The microstructure test show that phase transformation occurs which results in different grains from the parent metal area.
Economic valuation of rice agricultural land in Bogor regency
Authors: Sejati L B , Arifien Y , Maad F
Published: May 2020

This study aims to calculate the total economic value of lowland rice farming in Bogor Regency, and identify the factors that influence land conversion from agricultural to non-agricultural uses. By using the productivity method approach, CVM and benefit transfer, it can be seen that the total economic value of lowland rice farming in Bogor Regency, West Java is Rp. 119,480,139 / hectare / year. The new economic value is calculated based on functions as a food producer, as a function of absorbing labor, as a function of food security stability, and as a function of flood mitigation, not yet included as a function of erosion and sedimentation mitigation, as a function of air conditioning and freshener, as a function of carbon retarding, as a function of recycling organic waste, as well as a function of social culture and rural appeal. Then by using descriptive statistical analysis and simple regression, it is known that the conversion of paddy farming land in Bogor Regency, is influenced by internal factors, external factors, and government policies. Internal factors include: the geographical location of agricultural land, the area of agricultural land owned by farmers, the amount of farmers’ income, transformation of farmers’ economic structure, and farmers’ understanding of multifunctional agriculture. External factors include: population growth, urbanization, the macroeconomic situation, the ability of agricultural land, the value of land (land prices), the opportunity to buy land elsewhere which is cheaper, and the influence of the private sector. Government policy is the factor that is considered to have the greatest influence on the occurrence of agricultural land conversion in Bogor Regency, especially the problem of the implementation of government policies relating to rules regarding conversion of agricultural land that have not been implemented optimally.