bluuebunny/crossref_metadata_2025 huggingface dataset:
A Conceptual Model of Mobile Expert System for Integrated Pest and Disease Control: The Case of MyCorn
Authors: Agustiono W , Syarief M , Anamisa D , Damayanti F , Yusuf M
Published: July 2020

The study of plant disease detection systems development has become very popular especially after the introduction of precision agriculture and the widespread use of mobile computing in almost all area including agriculture. While there exist an abundance of frameworks or models, however, given the unique nature of pest and disease management influenced by the different types of cultivation setting such as location, history, soil and the threat’s, research in this area is still needed. In addition, crop disease and pest detection is a complex task requiring accumulated knowledge and expertise as well as collecting detailed information very often manually. Therefore, on the basis of generic expert system model, this research aims to develop a conceptual model of mobile expert system for pest and disease management. Drawing from the case study of MyCorn development project, this study specifically offers a conceptual model of mobile application which offers a collaborative platform for integrated corn crop disease and pest diagnosis, treatment, and protection. The findings also offer useful practical insights for those who are seeking to build similar expert system for agriculture crops other than corn.
Comparison of Hand Follower and Dead-End Filler Algorithm in Solving Perfect Mazes
Authors: Hendrawan Y F
Published: July 2020

A maze is a collection of walls and spaces arranged in such a way that they form a path/paths commonly connecting an entry point to a goal. There are various kinds of maze solving algorithms. These methods are used in practice to help navigate an autonomous system to find a path within maze to find a target such as an exit point, special item, or location to the next level. This research explored two maze solving algorithms: Hand/Wall Follower and Dead-End Filler. Experiments were conducted to measure the time needed for each algorithm in solving 50 perfect mazes of various sizes. The result showed that Hand/Wall Follower algorithm is faster than Dead End Filler algorithm; for example, in solving 800 x 800 cell mazes, the former required an average time of 98.74 milliseconds while the later needed 215.86 milliseconds.
Application of Latent Factor Model on a Restaurant Menu Recommendation System
Authors: Ifada Noor , Humaidi Zemmy Muamal , Sophan Mochammad Kautsar
Published: July 2020

A restaurant menu recommendation system is becoming a necessity following the trend of eating out at the restaurants. The task of such a system is to generate a top-
N
list of menus that may be of interest to a customer, in which the customer previous rating behavior is used as the learning model. In this paper, we apply the SVD (Singular Vector Decomposition) latent factor model as the learning technique of the recommendation system. Beforehand, we implement the mean imputation technique to fill in the missing rating entries so that SVD can also deal with the new customer that has no rating record in the system. Evaluation on a real-world restaurant menu recommendation dataset shows that our recommendation system is able to generate a top-10 list of menu recommendations to a target customer and that the results of the low-rank approximation using SVD are comparable with that of the full-rank.
Introduction Virtual Reality for Learning Media in Schools in Indonesia
Authors: Kurniawati Arik , Abdullah Fachrizal Farhan , Agustiono Wahyudi , Warninda Sheila Sisilia , Kusumaningsih Ari
Published: July 2020

This paper aims to introduce Virtual Reality (VR) as a learning tool for students. As the first study (Case I), we present a VR simulation as a learning therapy tool using the VAKT method (visual, auditory, kinesthetic, tactile) for children with Autism Spectrum Conditions (ASC). The second example (Case II), VR was used as a display environment to explore biology learning for senior high school students. Finally, the result from our experiences and lessons learned, VR can be used as a tool for school learning both for regular students and ASC.
Optimising the tower-defense games with advanced local cultural content and a greedy algorithm
Authors: Angkoso Cucun Very , Kusumaningsih Ari , Hidayat Nurul
Published: July 2020

The aims of our games is preserving the local culture of Madura island that many people may have left behind. By utilizing mobile technology that is currently growing rapidly, it is expected that the promotion of local cultural content can be more effective. The game-based application is an attractive media with fun content, so it is normally more easy to attract interest and to be familiar with people. Our contribution is to participate in the campaign of familiarization of local wisdom to re-establish the living tradition of regional cultural values as a national identity. Save The Madura Island game is a strategy game which carries out the Madura culture theme. The app allows players to learn Madurese culture happily by playing a game. Save The Madura Island game is inspired by tower-defense games and uses a greedy algorithm as artificial intelligence which is inserted in character of defense to help the character of defense in determining which enemy is more effective to be attacked first. From the experiments, it was concluded that the use of greedy algorithms in the application proved effective in helping reduce the number of enemies who escaped, which decreased from 41.8% to 30.4%.
Improvement of One-Dimensional Fisherface Algorithm to extract the Features (Case study: Face Recognition)
Authors: Muntasa  , Yusuf M , Syarief M , Yulmaini  , Sari P P
Published: July 2020

Recently, computer vision research results have supported many sectors to assist and solve problems. One of branch of the computer vision fields is biometric system. Many modalities have been implemented to depict the human characteristics. Face is one of the modalities that has been employed to recognize the human. A crucial problem of the face recognition is high dimensionality. The problem would impact on the computational performance, and even it could cause the process failure. Feature extraction is the solution to reduce the dimensionality. However, many cases have shown that feature extraction could fail as singularity problem. In this research, we proposed the improvement of the fisherface algorithm to solve the singularity problem. We have modified the singularity covariance matrix so that the matrix can be further handled and processed. The purpose of the paper is to improve the performance of the fisherface algorithm. We have verified our proposed algorithm by using the Olivetty Research Laboratory face image. We applied 7-cross validations to evaluate our proposed algorithm, the evaluation results achieved more than 92% accuracy.
A Novel Conceptual Model of e-Participation using Biometrics Technologies
Authors: Yusuf Muhammad , Muntasa Arif , Agustiono Wahyudi , Anamisa Devie Rosa , Syarief Mohammad
Published: July 2020

Participation from all relevant stakeholders is important to achieve the goal of every activity successfully. Nowadays, Information and Computer Technologies, for example, Biometrics, Internet of Things (IoT) and Big Data are used to support participation from the relevant stakeholders. Electronic Participation (e-Participation) already utilized broadly to empower people participation in politics, business, government, cultural activities. Moreover, Biometrics has been used broadly for an identification system. Biometrics system identifies physiological instead of behavioral attributes, such as palm veins, iris recognition, face recognition, fingerprint, DNA, palm print, hand geometry, retina, and odor/scent. Therefore, this research would like to collaborate e-Participation and Biometrics fields from the multidisciplinary perspective. Furthermore, the literature reviews show that research collaboration between e-Participation and Biometrics Technologies are still limited. Hence, the objective of this research was to develop a novel conceptual model of e-Participation using Biometrics technologies. This paper contributes by developing a novel conceptual model of biometrics technologies for e-Participation implementation. This research has some implications. For theory development, this research contributes to the novel conceptual model in e-Participation, E-Government, Information Systems, Informatics, Computer Science, Image Processing, and Biometrics fields. For Practice, the novel model could be utilized for practitioners, policy-makers, and other relevant stakeholders for e-Participation implementation using Biometrics Technologies.
A Conceptual Model of Indonesian Question Answering System based on Semantic Web
Authors: Syarief M , Agustiono W , Muntasa A , Yusuf M
Published: July 2020

This study aims to develop a conceptual model of question answering system in Bahasa using Semantic web technology. A trigger was built to periodically collect data scattered on the internet in a data center to shorten the query process on data without reducing the data completeness. The test case domain was automotive. This study used four types of ontologies: main ontology, ontologies from manufacturers, dealers, and rentals. This research has some novelties, such as solving the weakness of distributed and centralized data and combining the advantages of both by storing distributed data into a pool (centralized data) periodically, then querying the pool. Furthermore, it makes contribution by providing a conceptual model of Indonesian question answering system, particularly in automotive domain. This has some implications, such as extend the body of knowledge of computer science, especially semantic web and ontology fields.
The Hybrid Ant Lion Optimization Flow Shop Scheduling Problem for Minimizing Completion Time
Authors: Widodo Dian Setiya , Utama Dana Marsetiya
Published: July 2020

This article aims to develop the Ant Lion Optimization (ALO) algorithm for the Permutation Flow Shop Scheduling Problem (PFSP). We use the objective function to minimize completion time. We propose the Hybrid Ant Lion Optimization (HALO) algorithm to minimize completion time in PFSP. We offer one of the total search agents on HALO using the NEH algorithm. Determination of the position of the search agent using a Large Rating Value (LRV). How it works from LRV is sorting from the largest value to the value. To improve the solution for each iteration, we also use swap, flip, and slide exchange procedures. The performance of the HALO algorithm is measured by Efficiency Index Perscentage (EIP). HALO algorithm will be compared with several other algorithms, namely ALO algorithm and Hybrid Whale Optimization Algorithm (HWOA). We conducted numerical experiments with Ten variations of experimental data are used to show the performance of the HALO algorithm. Based on numerical experiments, the HALO algorithm is useful for minimizing completion time.
A reverse logistics model for plastic bottle recycling in Bank Sampah Malang
Authors: Garside A K , Farida U B , Masudin I
Published: July 2020

Malang city government created Bank Sampah Malang (BSM) that offers 3R concept (reduce, reuse, and recycle). BSM is the institution which is oriented toward reducing plastic waste, but their recycling process still has not considered the environmental aspect yet. In this paper, we developed a reverse logistics model for plastic bottle recycling in Bank Sampah Malang (BSM) with consideration minimizing the costs of reverse logistics and environmental impacts. The proposed model takes into account various parameters, including kinds of costs, availability of used plastic bottle, storage capacity, disassembling capacity, vehicle capacity, and demand of chopped plastic. Goal programming is used to formulate mathematical model and LINGO is applied to solve the model. Lingo results indicate the two goals have been achieved because the value of the positive deviation variable associated with the two goals are equal to zero. In addition, we got several decision variable solutions including: number of plastic bottles purchased from depot, number of bottle bodies moved to recycling area, number of bottle bodies recycled, and amount of chopped plastics delivered to firm.
Bioeconomic two predator-prey model of harvesting fishery
Authors: Belwawin S M , Riyana M , Harmawati D
Published: July 2020

In this article, the research conducted is a comparison of the Leslie-Gower model with logistical growth in the harvesting of predatory and prey populations. This study discusses reconstructing a modified logistic growth model by using the Holling III response function as well as voting on predator and prey populations, analyzing equilibrium points, determining and bionomic equilibrium. The bionomic equilibrium from harvesting was carried out on the Leslie-Gower modification model P(x∞,y∞,E∞), maximizing the profit function π of harvesting carried out in the model with pontryagin produced optimal equilibrium (xδ,yδ,Eδ).
Inventory Control System Using Distribution Requirement Planning (DRP) (Case Study : Food Company)
Authors: Ngatilah Y , Rahmawati N , Pujiastuti C , Porwati I , Hutagalung A Y
Published: July 2020

Distribution and inventory are two major components that causes total cost of the product become high. Those two components are not categorized in to the process that added value to the product. This research use Distribution Requirement Planning (DRP) to find the right quantity and short replenishment time in inventory decision that manufacture industries faced to supply their own Distribution Centers and Warehouses in food Company. DRP giving the lower total distribution cost than actual cost. It is because DRP supply products at each Distribution Centers and Warehouses in a minimum quantity using Economic Order Quantity. It also using the similar concept with Material Requirement Planning to find the right delivery time so that it can minimize the total inventory time in The supply chain. DRP can be used to solve the inventory and distribution problem in multi echelon supply chain. From this research, using historical data, DRP gave the minimum total distribution and inventory cost than the initial scenario that company used. Based on DRP result, The total Inventory and Distribution Cost from January to December 2019 is 481.251.325,4.
Comparation of Schedulling Methods: Campbell Dudek Smith, Palmer and Dannenbring to Minimize Makespan
Authors: Utami I D , Kuswandi I , Wibowo D E
Published: July 2020

Delays in completing one of production cycle will affect the entire flow of the next production process. DI is a manufacturing company that manufacture aircraft. In 2017 there was a delay in manufacturing processes of A380 aircraft wings, especially in machining parts, which resulted in delays shipping to assembly parts. This delays affected time delivery to customers. So that, scheduling plan was needed in this company. This paper proposes comparation of three scheduling methods, which are Campbell Dudek Smith, Palmer and Dannenbring with the aim of minimizing makespan. Result of this study describes that the best method for minimizing makespan is Campbell Dudek Smith method, with a scheduling sequence starting from job 13-6-5-3-10-4-9-1-7-8-18-11-14-19-17-2- 12-12-15-16, and the makespan value of 46.03 hours taken in constructing both.
Redefining Industry 4.0 and Its Enabling Technologies
Authors: Mubarok Khamdi
Published: July 2020

Industry 4.0 can be seen as the most buzzword that mentioned almost in every subject. Admitted as the new industrial revolution, research related to Industry 4.0 has gained excessive attention from academia, government, and industries. However, a formal academic definition of Industry 4.0 that reflected the current advancement could not be found. The technologies that driven this new revolution also bias. Furthermore, the subject area that greatly contributed to the vision of Industry 4.0 also unknown. This research investigated publications in diverse literature databases to find the answers of those gaps. Based on that, we proposed a comprehensive definition of Industry 4.0 and determined 12 enabling technologies that driven Industry 4.0. In addition, we found manufacturing and computer science as the most contributed research subject.
The Accuracy Measurement of Stock Price Numerical Prediction
Authors: Amar Samsul , Sudiarso Andi , Herliansyah Muhammad Kusumawan
Published: July 2020

Stock market prediction is both attracting and challenging. The successful of stock price prediction will give financial benefit, therefore, it has attracted many researchers and practitioners since long time ago. One of stock prediction performance measurement is the accuracy. There are many methods for measuring the accuracy, ranging from simple to sophisticated mathematical formulation. A method may be suitable for some type of data of condition to be forecasted while other methods may be suitable for other conditions. This article describes some of those methods. MAPE is the most popular accuracy measure for forecasting since it is intuitive, easy to be interpreted and can be applied to measure the forecasting accuracy for both individual item and across item groups. However, the MAPE has shortcomings. First, the value of MAPE will be undefined if one or more of the actual data are zero. Second, MAPE is very sensitive to outlier data. Third, equal errors above the actual value result in a greater percentage error than those below the actual value. Finally, using the MAPE for forecast methods comparison will lead to a systematically under-forecast result. Even with its shortcomings, MAPE is preferred for the forecasting accuracy method due to its applicability, interpretability and reliability. Thus, it is better to look for ways of correcting the drawbacks of MAPE rather than searching for alternative measures which are less desirable than MAPE. This paper proposes a modified MAPE using moving average of the actual data (MAPEMA) to reduce the drawbacks of MAPE. The result shows that the use of MAPEMA can reduce the problems of using MAPE.
Key Factors of Success Technology Transfer from Higher Education To Creative Industry in Bangkalan, Madura
Authors: Indriartiningtias Retno , Andi Rahadiyan W , Subagyo  , Hartono Budi
Published: July 2020

Technology is one of key factors in achieving competitive advantage of an organization, especially those in creative industries. Through effective technology transfer is it expected to be transferred technology really can be absorbed and used by the creative industries. There are several factors that influence the effectiveness of technology transfer, this research using four factors, there are: characteristics of transfer agent, characteristics of transfer recipient, form of technologies and Transfer Mechanism. Some models and framework can also be used to study the relationship of the key factors of success with the effectiveness of technology transfer. Based on a conceptual model, this research aims to identify the key success factors of the process of technology transfer from the Trunojoyo University to creative industries in Bangkalan Madura. This study uses a multivariate approach by using principal component analysis and linear regression. Based on data from the four creative industries in Bangkalan obtained mathematical models Y = 0.830 + 0.379 Form Technology + 0.450 Characteristics of Transfer Agent - 0.371 Characteristics of Transfer Recipient. The model has a R2 value of 0.299, which means those factors capable identifies the effectiveness of technology transfer by 29.9%, the rest is explained by other factors that have not been identified. From the model concluded that characteristics of transfer agent is the main factors of technology transfer.
Evaluation and Improvement of E-toll Card System at Suramadu Toll Gate
Authors: Hidayat Rachmad
Published: July 2020

The research was conducted to the manager or operator of toll road and e-toll users to find out what problems happened in transactions with e-toll cards. The purpose of the E-Toll Card is to simplify transactions and to unravel the traffic jam at the Suramadu toll gate. The methods used were the critical incident technique (CIT) and importance performance analysis (IPA). The research result in Suramadu toll road is 7 attributes that need to be improved. Evaluation and improvement of toll road usage system resulted that queue of vehicles at Suramadu toll gate was caused by the lack of socialization, lack of signs along Suramadu road access and lack of toll gate on Suramadu toll road. The toll road management is also required to provide a place for top up e-toll cards around Suramadu access. The toll road management also opens the e-toll card complaint system to the complaints of e-toll card users with the online system and also to reduce transaction errors on toll roads.
Development of an Automatic Anti Pitching System (APS) Autonomous Surface Vehicle (ASV) for Fish Mapping
Authors: Saputra Noverdo , Lukmana Muhammad Arifudin , Suranto Purwo Joko
Published: July 2020

The common problem occurs in fish mapping using autonomous surface vehicles (ASV) is pitching stability. Some researchers have indicated that problem affects the results of mapping. The target of this system is to design an Autonomous Pitching System (APS) for ASV using numerical simulation software. The simulation is done by implement APS into the system, producing an oscillatory motion from the ASV. For both dynamics of craft in short and long periods, APS with proportional controller (P), proportional-integral controller (PI), and proportional-integral-derivative controller (PID) are developed in order to minimize the oscillatory behaviour. It was found that for the short period dynamics, the APS with PI controller was the optimal controller, followed by the PID controller and then the P controller. For the long period dynamics, the APS with PID controller was optimal.
Ergo-physiological Work Station Reduces Cardiovascular Load and Visual Complaints of Carved Artists
Authors: Widana I.K , Sumetri Ni Wayan , Ketut Sutapa I
Published: July 2020

The problem felt by carving artists after doing full day activities is the increase in cardiovascular load and decreased ability to see objects. Physical signs that are felt by artists carving are increased heart rate and dizzy eyes or run away. One of the causes of an increase in cardiovascular load is a work station that is less ergonomic and a work environment that is not in accordance with the physiological needs of workers. Subjects carry out activities for 8 hours, starting at 8:00 a.m. up to 5:00 p.m., with a 1 hour break. Data is observed in conditions before and after the ergo-physiological rules are implemented. Measurements were made 4 times, namely at the initial and final conditions of the treatment without treatment and the initial and final conditions with treatment. Problem solving will be focused on the appropriate human aspect and utilization of technology, so that it will get the ECSHEP work process (effective, convenient, safe, healthy, efficient and productive) technical easy to work, economical, ergonomic, energy saving, environmentally friendly and in accordance with the trend of the era. The method of this research is experimental with the same subject design. Ten samples of responders who perform activities on conditions before and after treatment. Was examined data on environmental conditions were analyzed by the Mann-Whitney test. Data on cardiovascular load were tested with two pair sample t-tests, while visual data complaints were tested with Wilcoxon signed rank test at a significance level of 5%. The results showed that ergo-physiological implementation, in the form of giving work tables and chairs and improving environmental conditions can reduce cardiovascular load and improve the sharp vision of carved artists. The direct impact that can be felt by artisans is increased productivity and maintained product quality.
Study of thermal effectiveness in shell and helically coiled tube heat exchanger with addition nanoparticles
Authors: Sunu Putu Wijaya , Anakottapary D S , Susila I D M , Santosa I D M C , Indrayana I N E
Published: July 2020

Thermal effectiveness was performed as preliminary research in shell and coiled tube heat exchanger with addition of Al2O3 nanoparticles. In the present study, the effect of small concentration of Al2O3 nanoparticles analysis for steady state. Water is selected as the working fluid of cold fluid and refrigerant R-22 as hot fluid. The present work also includes the effect of nanoparticles on logarithmic temperature difference (LMTD), amount of heat absorbed by the water as a time series function. Based on the result, the effectiveness of water-Al2O3 nanoparticles as cold fluid shows good agreement on heat transfer parameter enhancement. The heat exchanger effectiveness increase until 2.2% compare to that of heat exchanger without Al2O3 nanoparticles. This phenomenon indicates an increases of heat transfer process inside heat exchanger. The application of water-Al2O3 nanoparticles on shell and coiled tube heat exchanger enhanced the convective heat transfer passively.
Evaluation of Air Side Characteristics Performance of Finned Tube Evaporator
Authors: Santosa I D M C , Waisnawa ING Suta , Sunu P W , Temaja IW
Published: July 2020

Improvement of Refrigeration system performance should be supported by increasing efficiency of its components. Mainly, two components must have excellent performance are condenser and evaporator. In this study examined a finned tube heat exchanger for evaporator application, furthermore research goal is aimed to enhance the evaporator designs in order to get higher efficiency and effectiveness of the heat exchanger. The effects of distance of fin, shape and size of the fin and combination of tube, will be investigated deeply and the heat transfer coefficient is going to examine using U-LMTD method based on some parameters of heat. This paper is still focus on design CFD model to comply the research purpose. The results were found that geometry design and meshing already compatible to get reasonable post processing results. Analysis of the air velocity vector in the heat exchanger showed good agreement toward references. Vortex and turbulence occurs in side are of the tubes and wake or stagnant flow seems in the behind tubes. The next examine is going to concern with model validation toward experimental results and investigated heat transfer coefficient in details.
Temperature Characteristics Investigation of Chilled Refrigerator with Humidifier
Authors: Santosa I Dewa M. C. , Waisnawa IGN Suta , Sunu PW , Sukadana IBP
Published: July 2020

Post-harvest cold chain of horticulture product in tropical country such as is very urgent to keep the product quality. In this country, the environment temperature and humidity are relatively high, so that the horticultural products are deterioration very fast. On the other hand, this condition can be used naturally for increase the room humidity. This study is aimed to investigate the medium temperature refrigerator performance when apply humidifier to keep the humidity of the system. This research was carried out by experimental investigation. The rig has been built with complete with measurement and instrumentation in order to get a precision control of temperature and humidity. The results show that the system reach good enough of COP which approximately 3.5. However the humidifier contributed a cooling load that can affect of 1 – 1.5 °C temperature increasing. Further studies will be examined optimisation humidifier system with low electricity consumption and eco operation condition with the best combination temperature and humidity to keep the products still has good quality under long time storage.
Optimization of Machining Parameters for Surface-roughness and Precision in EDM Using Response Surface Method
Authors: Yusron R M , Bisono R M
Published: July 2020

The quality of the components of the machining process is determined by the value of surface roughness and dimensional precision. This study uses the Central Composite Design experimental method on the Response Surface Method. To determine the variation of experiments, three factors and three levels were used, the specimens used were mild steel with a total of 20 experimental variations in the EDM (Electrical Discharge Machining) machining process. Then the surface roughness and dimensional precision are tested. Optimization is done by the method of non-linear programming, where the first response is surface roughness and the second response is the precision of the dimensions of the length of the machining process. The results of the analysis show that the strong current influences the surface roughness and dimensional precision. While on time and off time do not really affect the surface roughness or precision dimensions. Optimization with non-linear programming techniques produces a minimum surface roughness of 3.805880 (µm) and dimensional precision of the maximum machining time is 175.2290 (minutes) with a current adjustment of 3 (Amperes), on-time 100 (µs), and off-time 20 (µs).
Development of Learning Media Design Engineering Integrated with Machinery Element and Drawing Machine Based on Contextual Learning
Authors: Suwito Djoko , Budijono Agung Prijo , Yunus  , Kurniawan Wahyu Dwi , Soeryanto
Published: July 2020

Students understanding and skills in designing techniques lectures are not integrated with supporting subjects such as machine elements and machine drawing. This resulted in the majority of students difficulty in achieving learning goals. Referring to the development needs of the world of work, the design engineering course requires a package of learning tools that are integrated with the supporting subjects. Specific targets to be achieved in this research is to development of design engineering learning media with integrated engineering elements and machine drawing machine based on contextual learning. Learning device development method were adapted a 4D model, which includes definition, designation, development. Based on the results and discussion of research that has been done, the research team succeeded in developing learning tools in the form of teaching modules to support designing techniques lectures. Based on the results of validation by learning experts, engineering experts, and Indonesian grammar experts 3 expert validator showed that, the average score of validation included in good category (3.56). It can be said that the developed learning tools are worthy to use. Based on the results of limited trials, it can be said that learning is more effective with the indicator that the enthusiasm of students in participating in learning, student activities during learning categorized well shown by students actively involved in learning. Student learning outcomes have achieved mastery both individually and classically. In addition, students also showed positive responses to learning by expressing interest, excitement, and motivation to follow Designing course lectures using developed teaching modules and hoping the same pattern can be used for other appropriate courses.
Effect Variations And Types of Smaw Welding Electrodes on A36 Steel to Tensile Test
Authors: Rahangmetan Klemens Alrin , Wullur Christian Wely , Sariman Farid
Published: July 2020

Welding is the connection of the two metal materials into one, using a heat process without any pressure, defined as a metallurgical process. In the world of industry and metal welding which is used to construct construction is low carbon steel as the base material, and fracture is the nature of steel. This study aims to determine the effect of the type of electrode and current strength on the mechanical properties of welding results on ASTM A36 Steel. This research uses experimental research methods. In the welding process using ASTM A36 steel material on a specimen with a size of 100 mm x 25 mm x 8 mm in a flat / flat position (G1) using V. The type of electrode used is RB 2.6, RB 3.2, and LB 52 2.6 with variations in the flow of 70 A, 80 A and 90 A, which are then carried out by tensile test. The results of the research that have been done show that the value of tensile strength at the RB electrode 2.6 with a welding current of 70 A is 355.504 Mpa, 80 A is 439,795 and 90 A is 472,011 Mpa. For RB 3.2 electrodes with a welding current of 70 A of 263,955 Mpa, 80 A of 376,981 Mpa, and 90 A of 342,362 Mpa. At LB 52 2.6 electrodes with a welding current of 70 A at 478,974 MPa, 80 A at 484,172 Mpa, and 90 A at 485,152 Mpa. According to the data, it can be seen the results of welds using LB 52 2.6 electrodes at 90 A currents, with a tensile strength value of 485.152 MPa, a stretch value of 27.5%, and an elastic modulus value of 1764,190 N / mm2.
Magnetic Braking System Using Electromagnetic Force
Authors: Hairil Budiarto
Published: July 2020

A vehicle is a transportation that is widely used by humans as transportation for daily activities. Vehicles generally use mechanical brakes to do braking, these mechanical brakes have a system that requires friction forces to produce a slowdown in the vehicle. The frictional forces carried out will make erosion of the mechanical brake pads and the need to periodically replace the bearings. In this study discussed the design and manufacture of braking systems using electric brakes to support the performance of mechanical brakes. Electric brakes that have advantages in the media used compared to mechanical brakes, namely electric brakes do not require friction media to slow down, but electric brakes use four aluminum plates as magnetic force media, while coils or windings with the inner core will produce electromagnetic force as an actuator braking. The braking system that is carried out will maintain the speed according to the setpoint value of 5100 rpm. This electromagnetic braking results in a maximum braking of 500 rpm and takes between 9 and 15 seconds to reach the steady state position.
Hijaiyah Letters Sign Language Recognition for Deaf and Hearing Impaired Children Based on Principal Component Analysis Method
Authors: Achmad Fiqhi I , Diana R , Wita I
Published: July 2020

Knowing and learning hijaiyah letters is a very important basis in reading Qur’an from an early age. For some normal people knowing and learning hijaiyah letters is relatively easy but unlike the children who have special needs like deaf and hearing impaired children. They can only communicate using sign language both in the form of hand gesture, body gesture, and facial expression. From these problems, the author the author is motivated to make a system for implementing the hijaiyah letters cues for deaf and hearing impaired children using PCA (Principal Component Analysis) method which was installed on desktop computer.

The process of hand gesture recognition consists of several steps: camera initialization, preprocessing, feature extraction using PCA to find eigen value and eigen vector, and hand classification using euclidean distance. The output of hand gesture recognition is hijaiyah letters identification from alif to ya’ in the form of text and sounds.
Planning of Path Loss in Large Scale Signal Propagation Model at 5G Network by Using Linear Regression Methods
Authors: Ubaidillah A , Ulum M , Pramono S.
Published: July 2020

The generation of 4G network communication technology will gradually not be able to accommodate the community needs in the increasing data access speed. This research becomes very important to be one of many concepts in developing 5th network technology or 5G. Planning aims to observe the propagation model of 5G network signal to find the transmission path loss values using the mmWave signal propagation model, power link budget calculation, and analysis through linear regression. Based on the study results, the average path loss at 28 GHz and the line of sight and non-light of sight conditions for the Free-Space Reference Path Loss model are 97.7583 dB and 140.7436, while for the 73 GHz frequency each at 105.3378 and 131.6135 dB. Results of error standard deviation of linear regression models of the Reference Free-Space Path Loss at frequency 28 GHz conditions of line of sight and non-light of Sight 0.0636 and 0.7023 respectively, while the 73GHz frequency is 0.2855 and 0.5103, respectively.
Performance of 2.4 GHz Xbee for Digital Image Transmission with Yagi Antenna
Authors: Haryanto  , Rohman K , Rahmawati D , Anifah L
Published: July 2020

The use of xbee modules is generally used for sending sensor data. In wireless communication today not only sensor data is sent, but also images that have a higher level of complexity. This study is used to determine the performance of xbee based on the IEEE 802.15.4 protocol for sending image data. Yagi antennas are used to strengthen or support XBee performance when shipping. The stages of the simulation were carried out with the 2016 CST software. The VNA preameter test produced yagi antenna parameters with a working frequency of 2.4 Ghz return loss = -12.27 dB, VSWR = 1.545. The results of sending a vertical image resolution of 160 x 120 obtain an average delivery time of 4.05 seconds, a speed of 678.28 bytes / second and data loss of 29% with the furthest distance of 250 meters. The results of sending vertical images of resolution 320 x 240 obtained an average delivery time of 11.24 seconds, speed of 779.28 bytes / second and data loss of 20% with the furthest distance of 200 meters. The results of sending a horizontal image resolution of 160 x 120 obtain an average delivery time of 4.03 seconds, a speed of 727.15 bytes / second and data loss of 20% with the furthest distance of 450 meters. The result of sending a horizontal image resolution of 160 x 120 obtained an average sending time of 11.19 seconds, a speed of 735.52 bytes / second and data loss of 23.8% with the furthest distance of 400 meters.
Adaptive Genetic Algorithm for High School Time-Table
Authors: Saptarini N G A P H , Ciptayani P I , Wisswani N W , Suasnawa I W
Published: July 2020

Time-table scheduling in senior high school is complex combinatorial problem. The scheduling process needs much time and susceptible to human error. This human error can lead to the violation of hard constraints. Beside the hard constraints, the good schedule must minimize the violation of soft constraint to ensure the students’ and teachers’ preference can be satisfied. The aim of this study was to build the automated scheduling process using adaptive genetic algorithm (AGA). The AGA implements in this study to flexible the probability of mutation (pm) based on the fitness. The minimum pm was set to 0.01, while the maximum pm was 0.2. The experiment shows that the AGA give the better fitness compared to the original GA. The best fitness reached by AGA was 0.054 with the average of maximum generation was 402. The original GA with fixed pm 0.1 resulted best fitness 0.045 and the average generation was 387.
Proposed Mathematical Modeling of Small Remotely Operated Vehicle (ROV) Movement
Authors: Ayub Wahab Iis Hamsir , Nuryaningsih Rintania Elliyati , Sardju Achmad Pradjudin
Published: July 2020

In designing of Remotely Operated Vehicle (ROV), the most important issue is how to formulate the movements of the vehicle. This paper proposes the mathematical model of ROV movement. Combination of statics disciplines and dynamics of ROV movement are needed to formulate the mathematical model of ROV. Statics refers to the forces and moments that work on the physical system around the equilibrium point, dynamics refers to the effect of force on the movement of the object. Linear mathematical models analyzed can be combined or separated by taking into account the circumstances surrounding environment such as velocity vector of the linear state of the vehicle body (surge, sway and up) and angular (roll, yaw and pitch). Simulation results show that the movement of vehicles, both basic and combined movements have reliable characteristics.
Analysis Of WiFi Network Performance Using FDMI Method
Authors: Darsono Try Adrianto , Wayangkau Izak Habel , Marsujitullah
Published: July 2020

This journal aims to analyze how optimal the performance of WiFI network services, the results can represent the average performance of Internet network services against changes in the value of Quality of Services (QoS) parameters when the highest traffic in the Hotspot Lab IT Laboratory area and Musamus Informatics Engineering Department to support developments in the digitalization era as part of the 4.0 Industrial revolution. Measurement data was got from the results of interviews, observations, and literature studies. Measurement data captured using Wireshark, Fixed Daily Measurement Interval (FDMI) method is the method used in the measurement. The QoS parameters used in the measurement are throughput, delay, and packet loss. Overall, the average value of throughput got is 0.99 MBps. The average value of delay is 124.05 ms is in the very good category according to TIPHON standards. The average value of packet loss is 0.05% with the very good category. The measurement results show that WiFi networks in the Hotspot IT Laboratory area and Musamus Informatics Engineering Department are reliable and meet user needs.
Analysis on Calculation of Vehicle Operating Cost (VOC) Before and After Flyover & Road Widening Operation at Gedangan Intersection in Sidoarjo Regency
Authors: Wibisono R Endro , Mahardi Purwo
Published: July 2020

The main road that connects the city of Sidoarjo to Surabaya is the intersection of Gedangan. By 2018 it has reached saturation by having a poor service level. More severe conditions will occur in the next 10-20 years. One of the government’s efforts to overcome the problem of congestion, damage structure is the construction of flyover or other alternatives by widening the road. The purpose of this study is to determine the characteristics of the traffic and to save vehicle operating costs before and after the construction of a flyover at the Gedangan intersection. The method for predicting Vehicle Operating Costs (BOK) is to use PCI method. This study predicts Vehicle Operating Costs (BOK) to determine cost savings. The scenario for predicting BOK is that 80% of the vehicle volume will pass the Fly Over, and 20% still use the existing road. The results showed that the cost savings of Vehicle Operational Costs (BOK) of existing roads compared to the use of flyover in 2019 was IDR 15 Billion. In 2039 the savings are IDR 77 Billion. Another discussion is that if the road is only widened without flyover, then the BOK cost savings in 2019 will be IDR 4 Billion and in 2039 it will be IDR 27 Billion.
Constructed Wetland with Rice Husk Substrate as Phytotechnology Treatment for Sustainable Batik Industry in Indonesia
Authors: Rahmadyanti Erina , Wiyono Agus
Published: July 2020

This study aims to determine the vegetation efficiency of Canna indica plants and rice husk as a VFCW substrate in the batik wastewater treatment process. The VFCW pilot is made of acrylic with a length, width and height of 0.5 x 0.5 x 0.5 m respectively. Rice husk is filled as substrate to a depth of 0.3 m. Canna indica is cultivated and acclimatized then be planted in VFCW with 6 plants / units. Batik liquid waste is flowed with a hydraulic loading rate of 0.15 m3/d and variations in hydraulic retention time for 3 days, 7 days, 15 days, 21 days, and 30 days using an intermittent system. The results showed Canna indica proved to have a significant effect (p <0.05) on the removal of all parameters consisting of pH, BOD, COD, TSS, ammonia, and heavy metals Cr. Optimal efficiency for all parameters occurred at 21 days HRT which obtained TSS removal values of 91.25%, BOD5 of 91.82%, COD of 89.15%, ammonia of 96.2%, and heavy metals Cr of 81.8%. Effluents produced through the construction of VFCW with rice husks as a substrate and vegetation of Canna indica are able to meet the standards set out in East Java Governor Regulation No. 72/2013.
Study on Non-Engineered Building Vulnerability with Red Brick Masonry Wall through Finite Element Analysis
Authors: Zega Berkat Cipta , Sofianto M. Firmansyah , Prayuda Hakas , Monika Fanny
Published: July 2020

In this study comparing two types of simple house forms that were built without using count analysis. The building uses beams and columns that are usually used in a simple house in Indonesia. The modeled building consists of a square cross section and L cross section, also the modeled wall consists of a full wall, a wall with door openings, walls with door and window openings. Modeling using STERA 3D software to model non-engineered building comprise beams and columns and STERA FEM software for modeling walls. Modeling was carried out to analyze building shear stiffness, earthquake acceleration, and wall deflection when receiving loads. The loading in this study uses dead loads and earthquake loads using the time history method. The results of the modeling are the largest shear stiffness of a simple house building with a square cross-section of 35 kN/cm. The maximum land acceleration resulting is 8.72 m/s2. The largest wall deflection occurs at a load of 20 kN with a deflection value of 58.83 mm on the wall with door and window openings. The high deflection value is caused by the influence of the width openings on the wall and the load go down to the wall.
Experimental Study Additional Brantas Sands Of Clay Density
Authors: Ridwan A , Candra AI , Gardjito E , Suwarno
Published: July 2020

Land functions as a supporting medium for all living activities. The problem that is often encountered is the level of soil stability at each location is different, for this reason the following research is used to determine the parameters of stable soil density when soil structure composed of clay components added 10% of sand from the total weight of the specimen with different diameter variations using proctor testing. The density properties of clay soil after the addition of brantas sand with size variations passed the sieves number 8, 10, 16 and 20 amounting to 10% in perfect solid state the structure of the original soil specimens showed an γd value of 9.61 gr / cm3, in addition of sand 10% with a diameter passing through number 8 shows an γd value of 10.44, at number 10 shows a value of γd 11.77, at number 16 shows the value γd 10.97 and in number 20 shows a value of γd 11.55. the addition of sand to the expansionary structure with low stability can improve the level of stability of the soil structure. Moreover, the addition of sand with a no. 10 sieve diameter shows the value of dry volume density γd of 11.77, the value shows the above average density parameter - average of several other test objects.
Analysis Causes Damage and Prevention of Concrete
Authors: Winarto S , Candra A I , Siswanto E , Ajiono R
Published: July 2020

In the process of construction and post-construction, various problems can often be encountered, with one of them being damage to the concrete which can cause weakening of the concrete structure or damage to the concrete structure. Therefore, the need to prevent such damage by analyzing the causes of damage can be minimized. This research was carried out in collaboration with the contractor, where the first step taken was direct observation and interviews with the implementing contractor. By aiming to get primary data and secondary data so that data conclusions can be made and knowing the causes of damage to concrete structures in the construction phase can then provide advice on preventing damage to concrete structures that can be done. Based on the results of the study, it was found that the potential causes of damaging the concrete structure in the construction phase were problems with the height of the fall of casting, errors in construction, execution, vibrators, and errors in the installation of begisting.