bluuebunny/crossref_metadata_2025 huggingface dataset:
The use of Lapindo mud and emulsion asphalt as mixed materials in clay stabilization to increase compressive strength
Authors: Hendry H , Imbang R , Syahril S , Somantri A K , Pramaesti R M
Published: May 2020

Land is one of the construction materials available in the field that has diverse properties. Clay is a bad type of soil if it has poor soil properties such as high plasticity, low shear strength, high swelling, and large shrinkage potential. Soil stabilization is an effort to improve the quality of the soil by using certain materials to increase soil strength. Soil improvement by using mixture materials are mostly done to stabilize the soil. The mixing material used is Lapindo mud. A number of soil improvement techniques are offered to overcome problems in soft soil. The selection of soil improvement techniques is generally based on the formation of soil geology, soil characteristics, and costs. The stabilization used is emulsion asphalt which is locked of 8% and Lapindo mud variation of 3%, 6%, 9% and 12%. The results of physical and mechanical properties on soil material with stabilization of Lapindo mud and emulsion asphalt were obtained that the specific gravity increased by about 68%, with the density value (ωopt) of 16% and the dry weight content (γd) of 6%. In the compressive strength testing, the more Lapindo mud mixture, the less compressive strength (qu) value.
Study of stabilized soil clay soil characteristics using vulcanic ash and tailing as subgrade layers
Authors: Syahril S , Somantri A K , Haziri A A
Published: May 2020

Soft clay is soil that need microscopic to sub microscopic size originating from the chemical weathering of rock compilers. Clay soil is very hard in a dry state and is plastic at moderate water content. At higher water contents the clay soil is sticky (cohesive) and very soft. Soil stabilization is an effort to improve the quality of the soil by using certain materials to increase soil strength. Soil stabilization is the process of mixing soil with certain materials to improve the technical properties of the soil and is an attempt to change or improve the technical properties of the soil to meet certain technical requirements of the soil carrying capacity. This research is an experimental study to determine the carrying capacity of clay soil stability using volcanic ash deposits and tailings instead of cement. The research variables are volcanic ash deposits which is locked of 8% and tailings with the variation of 4%, 5%, 6% and ripening for 3 days, 7 days and 14 days. The benefits of this experimental study are expected to get the carrying capacity of the soil from stabilized soil greater than the carrying capacity of the original soil by the unconfined compression test (UCS).
Characteristics of Asphalt Concrete-Wearing Course (AC-WC) mixtures using concrete waste as rought agregate and addition of Wetfix-Be
Authors: Prayogo R D R B , Suherman S , Khairini N
Published: May 2020

Aggregates are important in the construction and improvement of roads but their numbers are limited due to deep river dredging and it is therefore necessary to find other materials that can be used instead of easily and cheaply obtained aggregates. This study, using concrete waste and the disadvantage is having a high absorption because it needs to be added an additive, namely Wetfix-Be so that the use of concrete can be applied in the field. The method used in this study is an experimental method using a laboratory scale. Tests conducted in this study are concrete waste as coarse aggregate. With variations with coarse aggregates of 40 and 60, 80 and 20, 100 and 0, and the results of comparison of Wetfix-Be material used are 0, 15%, 0.25%, 0.35%, 0.45% by weight of asphalt. The results of this study proved to be able to increase the value with an optimal Wetfix-Be of 0.25% of asphalt weight and asphalt weight of 6.3% The benefit of this research is to determine the characteristics of concrete waste by using Wetfix-Be added material on the flexible pavement in the AC-WC mixture and can reduce construction waste in Indonesia.
Compressive strength and permeability of concrete by using GGBFS against seawater
Authors: Subagdja A , Sofyan A , Rusmanto A
Published: May 2020

One of the causes of cracked reinforced concrete in the seawater environment is direct contact between concrete and sea water. This is because cement as a binding material in concrete does not have a good ability to withstand corrosive conditions in seawater. Ground Granulated Blast Furnace Slag (GGBFS) which in this case is B3 waste can be a solution. From several studies conducted previously, the behaviour of GGBFS concrete against sulfate and chloride attacks showed positive results but relatively little is known about GGBFS material produced by steel mills in Indonesia. Therefore, an experimental study of the characteristics of compressive strength and permeability test using GGBFS (0%, 20%, 30%, 40%, 50%, and 60%) with 72 concrete cylinders in 28 and 40 days. Microstructure of GGBFS concrete test using Scanning Electron Microscopy (SEM) was also studied. The result of this experimental study is GGBFS microstructure, compressive strength and concrete permeability for better effectiveness concrete in seawater, so that it can become one of the alternative solutions for infrastructure development especially for seawater infrastructure in Indonesia.
Moveable bridge inspection in Ancam Port North Kalimantan, Indonesia
Authors: Sumargo S , Rusmanto A
Published: May 2020

The Ancam Port is equipped with a moveable bridge to anticipate tides. The Moveable Bridge structure is a steel frame bridge with a length of 35,740 meters. This vertical free movement is accommodated by the pontoon but cannot deform in a horizontal plane in the direction of the bridge extending, causing damage to the connection between the pier and the moveable bridge. Under the pontoon there are indications of piles emerging from the riverbed and recurring collisions occur due to tides. This causes leakage so that water enters and causes an imbalance from the pontoon and a collapse of the Moveable Bridge occurs. The movable bridge analysis method is carried out using SAP 2000 software. Based on the analysis of the collapse the moveable bridge is able to withstand the planned load on the condition that the pontoon has to function properly. The solution to re-enable the moveable bridge is to use a geofoam-type styrofoam pontoon wrapped in steel plates. This research is expected to be a solution to the problem of movable bridges in Indonesia.
Information system development for maintenance work of green buildings in Indonesia
Authors: Zahrin A , Latief Y , Machfudiyanto R A
Published: May 2020

Building maintenance is an activity of maintaining the reliability of buildings, infrastructure and facilities to have the proper functions and are not damaged quickly. The main goal is to manage a building and its grounds, as well as customize needs for the facility and achieve the reliability requirements of building (comfort, safety, health and convenience). The problem is that the current condition of building maintenance is generally still conventional. As a result, the building maintenance process tends to be slow, often neglected, and can often result in insignificant additional costs. For example, the condition of a tempered glass was dirty and dusty conditions, then this will disrupt the lighting in the room, so that electricity will increase while the functional value of green buildings decreases. This certainly contradicts to the principle of green building that carries Energy Efficiency & Conservation/EEC, which is caused by non-maximization of one green building’s components especiall in architecture components. The purpose of this research is to improve the performance of maintenace work to green buildings in state’s buildings for architecture components. The research methods used are literature study, data analysis and case studies of information systems development. Minister of Public work regulation 24/2008 are used as a Guidelines for Building Maintenance which are then integrated into the Information System-WEB. By developing an information system for maintenance, the performance of Architecture Components in green building will be achieved 4 points from building requirements and reduce the possibilities damage in future especially for plafond and tempered glass damage. The results of this studies is a web-shaped information system that is useful for state agencies and others in carrying out the work of maintaining a green buildings, especially in the architecture component.
Cyclic behavior of Ground Granulated Blast Furnace Slag (GGBFS) concrete beams
Authors: Fikri H , Krisologus Y P , Permana R , Raafidiani R
Published: May 2020

Repeated cyclic loading organized on a part that causes fatigue fracture. As which occurred on the concrete beam bridge that receives the brunt of the weight of the vehicle. The modulus of elasticity of concrete varies depending on the strength of concrete, type of loading, characteristics and a comparison between cement and aggregates. Concrete with the substitution of cement in conditions of static load tendency to be stronger than normal concrete, this research used substitute material cement is Ground Granulated Blast Furnace Slag (GGBFS) are classified as waste (hazardous and toxic substances) that have properties resembling cement, so that expected to reduce waste slag as an alternative material partial replacement of cement. Preliminary testing has been conducted to determine the optimum value substitution GGBFS on concrete quality (fc’) 21 MPa and a maximum in 50% PCC and 50% GGBFS. In this research used 3 specimen concrete beam size 20 × 30 × 330 cm, 2 specimen concrete beams each beam with high levels of 45% and 50% GGBFS, and 1 specimen of normal concrete beams as a comparison so in this research expected that GGBFS concrete beams that require cyclic produce better durability than normal concrete.
The influence of transformational leadership and soft skills on project manager for project success factors
Authors: Rogo V , Rarasati A D , Gumuruh H
Published: May 2020

Construction projects have been identified as one of the most difficult projects to succeed, because they need to lead people effectively to achieve the success of an organization. The lack of influential leaders and the relationship management with team members and stakeholders makes productivity in construction projects is very low, and the emergence of various types of management deviations and project failures in the construction sector have emphasized the needs effective leaders to effectively manage projects and team members. This research conducting a quantitative survey of construction professional minimum with supervisor position and 3 years experiences in construction industry inside Indonesia. Data which already collected will be processed and analysed using the Structural Equation Modelling (SEM). This research has confirmed the effect of transformational leadership and soft skills on project managers influencing project success factors. This research has also found that transformational leadership and soft skills in project managers will be able to increase their contribution in achieving the project’s vision, mission and goals.
Increasing terminal capacity based on adaptive port planning case study at Cigading Port, Indonesia
Authors: Utama D P , Berawi M A
Published: May 2020

The effective infrastructure in the archipelago country to distribute goods is through port loading and unloading activities. One of port that will be the object of this research is Cigading Port in the Banten Province. Main activities of this port are handling dry bulk and liquid bulk cargoes. This port will expand in line with port’s vision and mission to increase cargo handling. The expansion is carried out to achieve target of cargo handling to 26.81 million tons in 2025. This expansion is required big funding, proper planning and can be adjusted to the needs in the future. The purpose of this research is to gain conceptual design and development of various scenario that plausible in the future for Cigading Port. The research methodology will use framework of Adaptive Port Planning (APP) using scenario method. This framework gives advantages compared to conventional planning because of APP can identify, have flexibility in design, and can be adapted from the uncertainty factors in the future. By using this framework, port planner will have several scenarios based on the uncertainty factors that have been identified so he/she can determine the best decision to develop Cigading Port. As results, thirteen uncertainty factors are identified and also four plausible scenarios are developed and based on expert opinion one scenario is chosen that may be developed for conceptual design of the expansion Cigading Port.
The effect of aggregate gradation on concrete fracture energy using the work of fracture method
Authors: Fidi F , Muin R B , Patty A H
Published: May 2020

The micro-cracks that commonly occur in concrete structures are a potential source of crack propagation which leads to the possibility of catastrophic failure. Concrete cracks that occur propagating mainly along the interface zone that significantly conditioned by aggregate characteristics. Aggregate characteristics as concrete fillers have a significant role as a strain energy release medium known as fracture energy. This research is using an experimental investigation about the fracture characteristics of concrete using different gradations with a maximum diameter of 25 mm and 20 mm. The experiment includes a compressive strength test and a fracture parameter test. Three-point bend test was selected based on RILEM recommendations to calculate fracture parameters. The result has shown that the aggregate gradations used in concrete mixtures should take into account the effect on compressive strength and total fracture energy. Uniform gradations with smaller maximum sizes have high compressive strength but low fracture energy.
Implementation of project-based learning method to increase transferable skills of vocational high school students
Authors: Astarina S , Barliana M S , Permana D C
Published: May 2020

Instead of reducing the unemployment rate, Center Berau of Statistic (BPS) 2018 data shows that Vocational High School (SMK) graduates contribute high to the number of unemployed in Indonesia. The high number of unemployed is partly due to the low technical skills and transferable skills of students. Transferable skills are considered very important to strengthen and complement technical skills, amid the disruption of the world of work in the industrial era 4.0. In order to strengthen transferable skills, innovative learning methods are needed, which involve active student participation. The One Group Pretest-Posttest experimental research was conducted to find out the increase in transferable skills of SMK X students in the Building Design and Information Design Study Program (DPIB), through the implementation of project-based learning methods. The results of the gain index analysis, hypothesis testing, and observation results indicate that the application of project-based learning methods can improve the transferable skills of vocational students.
Socioeconomic and environmental factors affecting the preference of residents to stay at the simple rental housing
Authors: Saraswati S , Rohman S
Published: May 2020

Goal No. 11 in the Sustainable Development Goals (SDGs) is to make cities and human settlements inclusive, safe, resilient and sustainable, with targets by 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums. Affordability of housing will depend on the following factors Sastra and Marlina: (1) Per capita income; (2) education level; (3) socio-economic; and (4) political and security situation. According to Turner there is a link between a person’s socioeconomic conditions with the priority scale of living needs and priority housing needs, and for low-income people, the shape and quality of the house occupies the last fulfillment priority. Are socio-economic factors can influence the preference for living in low-cost housing? This research aims to determine the magnitude of the influence of socioeconomic factors on the preferences of residents of simple rental flats and what socioeconomic factors most influence the preferences of residents and their correlation with other factors. The method uses mixed methods, these are between qualitative and quantitative methods. Collecting data through direct observation activities on the object of research, and distributing questionnaires to 146 samples of respondents of all rusunawa in Bandung City, Indonesia. The results of this study, the correlation analysis concluded that a strong factor in the relationship between the preferences of respondents who occupy low-cost housing is the rental price and income.
Reinforced concrete beam behavior with strengthening of CFRP lamination in the seawater environment
Authors: Ruslan U , Solih A , Ader G
Published: May 2020

The strength of concrete structures in the seawater environment decreases with the duration of exposure seawater due to high content of chloride compounds. Repairing structures are difficult in marine environments requires creating new methods that are effective, easy to work and economical. One of them is by using CFRP (Carbon Fiber Reinforced Polymer) material which is proven to corrosion resistant. Strengthening is done with external bond CFRP on the area that you want to strengthen. This research was conducted with an experimental method, namely reinforced load concrete beams were given a monothonic load with two points to determine the ultimate load capacity of the beams and then compared with the increase in the CFRP variable layer which the ends were anchored with CFRP U-wrap and given sea water immersion behavior. The results of the flexural test showed that along with the time of sea water immersion there was a decreases in the capacity of the ultimate load from the normal beam and with CFRP reinforcement are on normal test specimens without reinforcement of 3.12%, concrete with CFRP layers 1,2 and 3 in sequence are 2.92%, 2.84, and 2.75%. The largest ultimate load capacity with 3 layers of CFRP is 36.23%.
Enhancing mechanical component performance with development of web-based maintenance guidelines for green buildings
Authors: Rachman A , Latief Y , Machfudiyanto R A
Published: May 2020

Mechanical components namely HVAC system, piping, plumbing and vertical transportation on green building has major impact namely emission and energy reduction. The purpose of maintenance on mechanical components is to maintain achieved mission on green building performance. Failure in maintaining mechanical components can highly affect the cost of maintenance. Problems that ocure in this study is maintenance nowadays still using paper-based document affecting undocumented data that slow down maintenance report, guidelines nowadays still focused on conventional building not focused to green building. Therefore, massive budget spent in construction phase will be whortless. The purpose of this study is to improve maintenance guidelines on mechanical components that will enhance maintenance response. To enhance maintenance response this study will make web-based information system named e-maintenance that can reduce maintenance response time and get rid of undocumented maintenance data. The research method are surveys, quistionare and literature reviews. This study will develop maintenance guidelines from ministry regulation number 24/M/PRT/2008. The result in this study explained that web-based information sytem using developed maintenance guidelines can enhance maintenance response time and performance of mechanical components in green building.
Groundsill stability in downstream of bridge “Besi” in body of water at River Garang Semarang city, Indonesia
Authors: Sutopo Y , Saputro A E
Published: May 2020

During the dry season the elevation of the flow at crest groundsill is the same as the elevation downstream, which is assumed that the dimensions of the groundsill are not large enough. These less large dimensions cause the groundsill weight to be small, so its stability is very doubtful. It is this doubt on the groundsill stability that led to this research. The aims of this study were to analyze the stability of the Groundsill Bridge in the Garang River channel on the force of overturning, sliding, eccentricity, bearing capacity of the soil, and piping. This research employed survey method. Data collection methods used were observation and secondary data. Analysis of the data were rainfall design of a 50 years return period; flood discharge design with a 50 years return period; the forces acting on the groundsill, and the groundsill stability. The results of the study indicate that: the groundsill were safe against overturning forces, eccentricity, and piping under normal flow and flood conditions; the groundsill were not safe against sliding forces under normal flow and flood flow conditions; the bearing capacity of the groundsill subgrade were safe against forces that occur during normal conditions and unsafe during flood conditions.
Potentials and constraints of the spatial and regional development perspective using regional genetic methods
Authors: Iswandaru I , Adhitya E , Nurrochman A
Published: May 2020

Regional development is a strategy of utilizing and combining internal factors (strengths and weaknesses) and external (opportunities and challenges) that exist as potentials and opportunities that can be utilized to increase the region’s production of goods and services that are a function of the needs both internally and externally. These internal factors are in the form of natural resources, human resources and technological resources, while external factors can be opportunities and threats that arise along with their interactions with other regions. The comprehensive spatial planning and development of the region certainly needs the support of information on the potential and constraints of the region with its own genetic background as a whole, meaning that all complete information about all aspects relevant to the spatial needs are met. Information for spatial planning includes potential including physical-mechanical properties of various types of rock masses. Leles is one of the sub-districts in Garut regency which has an area of 6.5 million hectares with a large potential of mining excavation. Regional Spatial Planning Arrangement based on the potential of mineral excavation ensures mining plans in the area do not kill other potentials and shows conformity to the plan long-term. Mountain sand eruption excavated as an industrial commodity is the biggest potential in the Leles region. The existing constraints are related to earthquakes and volcanic eruptions.
Machine learning approach as an alternative tool to build a bankruptcy prediction model in banking industry
Authors: Siswoyo B , Herman N S , Dewi D A
Published: May 2020

This paper focuses on the study of a bankruptcy prediction model using a hybrid machine learning that combines two synergistic algorithms i.e. two-class boosted decision tree and multi-class decision forest. The hybrid model ensures the building of multiple decision trees whereby the latest tree corrects the previous tree, learning from the tagged data and subsequently votes on the most popular tree as the final decision of the ensemble. This hybrid machine learning is proposed to be an alternative of the bankruptcy prediction models that is able to produce three major classifications i.e. bankruptcy, grey area, and non-bankruptcy. There are five variables considered in the hybrid model which consist of working capital for total assets, retained by total asset, earnings before interest and taxes on total asset, market value of equity to total bank value of liabilities and sales of total asset. These input data are applied and tested to the public dataset produced by Bank Indonesia from year 2011-2015. The hybrid model shows a significant result whereby the overall area under curve (AUC) had successfully achieved 95% value that indicates the capability of the hybrid model to train the test data and identify the relationship of input-output data. This finding suggests that the machine learning approach can be treated as an alternative tool to build a bankruptcy prediction model for banking industry. Introduction
Pattern of symptom correlation on type of heart disease using approach of pearson correlation coefficient
Authors: Munandar Tb A , Sumiati S , Rosalina V
Published: May 2020

The relationship of a symptom on a type of disease provides information on how strong the disease is affected by the symptom. The strength of the relationship of symptom has not been much researched, yet it is very interesting and important to do in order to strengthen the formation of final hypothesis, especially in the development of expert system. This research was conducted to map the relationship of a symptom on the type of heart disease, based on the echocardiography value and the result of electrocardiogram measurement. About 150 data of patients with heart disease were analyzed using the approach of Pearson correlation coefficient. The research result showed that the type of disease such as atrial septal defect was much affected by the aorta symptom, the value of left atrium, the ESD, the PR [PQ], and the QRS. The type of coronary artery disease was much affected by the symptom of the values of EDD and ESD. Most of the symptoms did not have a strong relationship for the type of diastolic dysfunction disease. For the type of rheumatic heart disease, about 62.86% symptoms had relationships, spread from the weak relationship, the moderate, the strong, the very strong, and even to the perfect relationship. The type of normal resting echocardiography disease had the relationship level of “no relationship” between the higher symptoms, compared to the rheumatic heart disease; and as well as the types of left ventricular hypertrophy disease and the hypertensive heart disease.
Job seeker information system using online web based and android mobile phones
Authors: Parinsi M T , Palilingan V R , Kembuan O , Ratumbuisang K F
Published: May 2020

In this era of globalization, information technology is very important in the need for accurate, precise and fast information in presenting very complete data and this is one of its important objectives. For this reason, information technology plays an active role in all fields, especially this time in presenting data about Minahasa Regent unemployment that searching for a job, and all information relating to it. The development of internet technology, society is increasingly facilitated in doing several processes, one example is registration of prospective This study uses a Prototype development model that has 3 Stages, namely Listening to Customers, Building to improve prototypes, Customers testing prototypes. Application trials are conducted using Black Box Testing where there are 3 types of trials conducted by the author, namely Developer Test, User admin test, User community test workers who can done by opening the company’s website or job vacancy provider services. Primary data collection is done by in-depth interviews using open-ended questions and observation with critical incident techniques. In this study it was concluded that, Web-based Information System Design, is actually very necessary to find out various kinds of unemployment data and activities around Minahasa Regent. This process made easier because of registrants do not have to come directly to the company or service the provider of the vacancy in question to do the registration process so will automatically save time and costs issued by the registrant. This research will developing a software design and manufacturing web-based process that can do registration and selection of recruitment of prospective workers work online. Also provided information services for prospective workers, among other things, look at the announcement of vacancies work, see the results of the selection of admission of candidates online workforce. So the process recruitment of prospective workers by companies that concerned can be held more transparent, and able to increase interest from prospective workers because of the ease of the process registration.
User interface design pattern modeling for designing mobile-based scheduling activity application for senior citizen
Authors: Putri N A , Junaedi D , Suwawi D D J
Published: May 2020

Design patterns are explanations or templates that show how to solve problems that can then be used in different discussions. Design patterns are also a good solution for repetitive design problems, such as those given in activity scheduling applications for the elderly. Based on the results of literature studies conducted, related to the problem of compiling the elderly to scheduling activities on applications designed for the community because the elderly have special characteristics. From this recurring debate, a Design Pattern is required to request applications for the elderly. In this research, there is a modeling flow consisting of four processes, namely creating new design solutions that produce design patterns, user research using the User-Centered Design method that results in user needs analysis, creating new design solutions that produce prototypes, and finally from this research Testing design solutions are. From this modeling flow, the User Interface Design Pattern and Activity Scheduling application prototype for the senior citizen can be produced that can help to achieve the objectives of carrying out daily activities.
Booking smart parking system using microcontroller
Authors: Ramsari N , Utomo S
Published: May 2020

Recently there are many vehicle users have difficulty to find a parking area because no information full or empty parking slot so that it can cause congestion, pollution, and fuel inefficiency, because of these conditions can cause difficulty in controlling the parking management. By using microcontroller smart parking system (based on IoT) parking problems can be resolved. Smart Parking System is designed to make easier for parking users to get information on the availability of empty and filled parking slots, in addition to that parking users can also book for parking slots using web based applications. There are many phases to implement microcontroller based Smart Parking System i.e requirements systems, prototyping development, prototyping evaluation, coding system, testing and evaluation system. This system uses hardware such as Arduino Mega, Arduino Uno, Ethernet Shield, PN532, LDR, and NFC. The programming language used is C to configure Arduino and PHP which are used for the web interface while MySQL for database server. By Smart Parking Application, it is expected to help parking service users to get information and find empty parking slots through booking in the application so that it will be more efficient in time and parking management will be more controlled.
Hypertext preprocessor framework in the development of web applications
Authors: Saroni M I N , Mulyanti B
Published: May 2020

This writing paper aims to determine the Hypertext Preprocessor (PHP) framework that is widely used and analyze the benefits of the framework in making a web application. A review systematically through a review article about a PHP framework. Article search is accessed from an internet database search. articles are taken from 2014 to 2019. The PHP framework can simplify the process of developing web applications because the concept has already been determined. Whereas if you use regular PHP, a programmer makes coding, folder structure or configuration is made as he wishes. Usually, the PHP framework uses the concept of Model-View-Controller (MVC), its function model is for database queries, its View function is for displaying HTML (Hypertext Markup Language), the controller functions for calculations or logic. The result is that PHP Laravel and CodeIgniter frameworks are the most widely used in building a web application. PHP Framework makes the development of applications web becomes much faster and more stable. The selection of a PHP framework that is appropriate for the project of making the application web also can affect the outcome performance was obtained after the application of the web was completed.
The quality classification of professional teacher using fuzzy-analytical hierarchy process
Authors: Runtuwene J P A , Tangkawarow I R H T
Published: May 2020

Teachers are required to carry out their duties and responsibilities based on the four fundamental teacher competencies. Teacher competencies are pedagogic, personality, social, and professional. The quality of professional teacher determines based on an assessment of the four fundamental competencies of teachers above. The focus of this study is the classification of professional teacher quality assessment results based on teacher competencies. The quality classification of professional teachers uses a fuzzy rule-based method. The purpose of this study is to provide better measurement and classification of professional teacher quality; it easier to make policy decision-making processes for improving the quality performance of professional teachers. The results of this study show the quality of the professional teacher 66.7% in medium class and 33.3% in high class with no professional teacher in low class.
The effect of Electronic Word of Mouth (e-WoM) on social media networking
Authors: Gunawan A I , Najib M F , Setiawati L
Published: May 2020

Social Media Networking is a platform that has recently become the main media in information retrieval, digital use is easy to access for anyone, anywhere. Tourism is one of the industries that use this media platform to increase tourists visits. Bandung is one of the favorite tourist destinations, many social media users who post information, comment, review and ask fellow netizen, thus it will appear a destination image of Bandung that impacting visits. The data were collected from 195 respondents. The hypotheses were examined using Partial Least Square 3.0. This research discloses that electronic word of mouth (e-wom) on social media networks can influence the image of the destination and have an impact on the revisit intention of the tourism destination. The research findings show that the construct of E-Wom on social media Instagram has a direct effect to revisit intention, but the effect is greater when through the destination image. This research provides input and a better understanding for researchers and practitioners of the tourism industry on how to develop tourism revisit from enhancing destination image and keep the positive e-Wom on Instagram.
Implementation of Y-Model GIS web development in inventory of environmental roads, drainage and septic tanks: A study case
Authors: Fauzi C
Published: May 2020

Inventory of GIS Web Applications for Environmental Roads, Drainage, and Septic Tanks is an information system built to support spatial requirements, where these applications are built to address the problem of investing in environmental roads, drainage, and septic tanks according to maps. In developing a web-based GIS application, it usually uses the software development methodology but in this study, the application implementation uses the Y-Model Webgis Development (YWDM) which is a combination of web engineering and the context of developing web-based app with a study case on inventorying spatial requirements on roads, drainage, and septic tanks. This methodology was implemented as a map visualization for city planning and development and is needed applications that are capable and appropriate. By using the YWDM methodology, the needs and accuracy of application development can be done well, using several tools. The data process uses tools, including ArcGIS ESRI, to create spatial data and PHP and JavaScript programming languages to visualize the results. The results show that application development is built more easily because requirements can be well defined because a collection of requirements from the context of software development and spatial specifications are met and the application is completed. When creating a GIS web application, some methodologies can be used besides waterfalls or ordinary SDLCs, because spatial requirements are not well defined. With the implementation of this methodology, it is proven that the development of GIS web applications can be easier and by the needs desired by the user.
E-learning success determinants in higher education: A systematic literature review from users’ perspective
Authors: Rizana A F , Hediyanto U Y K S , Ramadhan F , Kurniawati A
Published: May 2020

The implementation of e-learning become more and more popular among higher education institution. However, the costly implementation of e-learning not a guarantee that it will be successfully adopted. There are reports where the adoption rate of e-learning users is often low, resulting the expected benefits failed to be achieved. In order to solve this issue, the important factors that influence users’ adoption and usage rate need to be identified. Therefore, this study aims to identify the critical factors of e-learning success in higher education. A systematic literature review protocols was employed in this study to identify the success factor of e-learning from previous literature. The review process is conducted towards articles published in science direct and emerald insight from the past 10 years. There are total 20 articles selected as primary articles for further review. According to the articles reviewed in this study, the success of e-learning implementation is reflected on three variables i.e. users’ satisfaction, actual usage, and continuance usage. Moreover, there are six dimension that is critical towards e-learning success i.e. students’ characteristics, instructors’ characteristics, users’ extrinsic motivation, infrastructure and system quality, course and content quality, and organizational support.
Group decision support system for employee performance evaluation using combined simple additive weighting and Borda
Authors: Aziz T F A , Sulistiyono S , Harsiti H , Setyawan A , Suhendar A , Munandar T A
Published: May 2020

Subjectivity in performance appraisal is almost inevitable. Subjectivity is defined as a perspective based on personal views or feelings about a thing. Eliminate subjectivity factors so that assessing objectively based on certain criteria is difficult to implement, whereas subjectivity causes unfair competition and giving rise to an uncompetitive environment. This research was conducted to reduce subjectivity in a performance appraisal using the Group Decision Support System with Simple Additive Weighting and Borda methods. Employee performance appraisal at PT. Krakatau Osaka Steel was the object of this research. The Group Decision Support System has selected the best employees from 59 employee samples taken by the Purposive Sampling method resulted the 7 best employees according to the assessors with a Decision Support System, these results are then reselected to become the 3 best employees provided by the Group Decision Support System. The results of Group Decision Support System were found that A2 was in the first place with a Borda score of 0.218336, followed by 2 other employees, namely A52 and A1, with a Borda score of 0.206507 and 0.205753, respectively.
Moodle mobile development in enjoyable learning in computer system subjects
Authors: Wibawa S C , Sulistiyo E , Martiningsih N G A G E , Handoyo E , Johan A
Published: May 2020

The mobility of students in the world of education is displaced by social media which is a concern for educators to utilize, create or innovate in the world of Education. This study aims to utilize moodle mobile in the development of learning material as an online learning media that approaches social media platforms. The media application development method uses Waterfall, consisting of (1) requirements, (2) analysis, (3) system design, (4) Coding, (5) Testing system, (6) Acceptance Test. Sample testing on media experts, Acceptance Test uses a response assessment consisting of 5 aspects namely Perceived ease of use (PEOU), Perceived usefulness (PU), Perceived Enjoyment (PE), and Intention to use (INT). From the analysis of the Acceptance Test study for 130 students Perceived ease of use (PEOU) of 92.30%, Perceived usefulness (PU) of 86.34, Perceived Enjoyment (PE) of 88%, and Intention to use (INT) of 87, 10% Then from the two classes using independent T-Test two samples showed that the value of the T-test reached 0.046 where the value was below the significance value of 0.05, indicating that H0 was rejected and accepted H1, and so the result was a difference between learning outcomes using the method conventional and learning using Moodle Mobile.
Simulation and modeling of aircraft movements passing through VOR
Authors: Rachmanto A D , Iswanto I , Hernawati H
Published: May 2020

VOR/DME is an air navigation equipment, in flight navigation equipment is needed by the pilot as the direction to fly to the destination airport. The pilot tunes the destination VOR/DME frequency, the HSI on the aircraft will display the heading, bearing, deviation, course data, taking into account these data the pilot will arrive at the destination airport. The research objective is to make aircraft simulation software pass VOR/DME. The software is developed using the prototype method, which is by making a display model first, then comparing the display models that have been made with the existing VOR/DME simulation device. Simulation modeling are developed by placing VOR/DME at the appropriate latitude longitude, map modeling using MapX4.5, the plane is conditioned by selecting at a predetermined point, HSI instrument is modeling using GL Studio, the programming language used is C #. Calculation results obtained are visualized on the HSI instrument kit so that the user can see the flight direction of the aircraft on the map and visualization of the instrument. The calculation results are compared with the Garmin Integrated Flight Deck Trainer. With this software it is expected to be used in flight schools in Indonesia in the pilot learning process.
Speed control of DC motor based on wireless networked control system with time delay and saturation parameters
Authors: Tahtawi A R A , Baisrum B , Jadmiko S W
Published: May 2020

The integration of a wireless network in a closed-loop control system can provide several benefits such as flexibility, installation, and maintenance. However, the presence of time delay in the network system can reduce the control performance. On the other hand, control signal saturation is also the problem that must be overcome in designing a controller. This study aims to design a DC motor speed control by integrating wireless network in its closed-loop system. This concept is known as the Wireless Networked Control System (WNCS). The network parameter used in this study is focused on the time delay. In the controller side, we use a saturation parameter which usually occurs due to limitations of the input signal. The PI-AW controller is used due to having the ability to overcome the saturation of the control signal. The simulation results show that the PI-AW controller can produce the best responses if compared with PI linear and PI saturated with settling time under 1.5 seconds and overshoot less than 8% for three constant values of time delay. The control signal generated also does not exceed the maximum limit of 12 V.
Identification of object characteristics using the fusion sensor method in wireless sensor network environments
Authors: Hudaya R , Isdaryani F
Published: May 2020

This paper contains an explanation of the research results to solve the problem of selecting the category of mangosteen fruit in a grading process using method image processing through geometry measurements of flat areas, color measurements, shape and texture characteristics. The aim is to implement the selection process through a grading machine to be able to sort two categories of mangosteen fruit based on the characteristics that are trained using the Linear Discriminant Analysis method. The proposed method is the use of four image sensors which are perpendicular to each other in the grading process line. Each sensor provides a decision on the group of objects it identifies, “accepted” if it meets all the requirements or “rejected” if one of the requirements is not met. The results of each sensor decision are sent to the sink node in the wireless sensor network environment to be jointly decided using the method of redundant cooperative sensor whether the objects identified together can be “accepted” or “rejected”. The results of grouping give an error rate of ± 9.8%. The biggest identification error comes from the measurement of colors caused by light noise.
Simulation of source current harmonic elimination technique using phase shifting transformer
Authors: Kastawan I M W , Yusuf E , Fadhilah A
Published: May 2020

This paper presents design of phase shifting transformer to reduce source current harmonic generated by using of variable speed drive (VSD) in textile industry. Nine VSDs are used in a stenter machine of a selected textile industry. Each of these VSD generates source current total harmonic distortion (THD) in range of 43.91% to 50.34%, which contains all odd order harmonics except the triplen ones. The first method to reduce this source current harmonic is by using arrangement of three phase shifting transformers, which requires one Yy three-phase winding connection to produce 0° phase shifting, one Yz(+) three-phase winding connection to produce 20° phase shifting and one Yz(-) three-phase winding connection to produce –20° phase shifting. The second method is by using arrangement of nine phase shifting transformers, which requires one Yy three-phase winding connection with 0° phase shifting, four Yz(+) three-phase winding connections with 6.67°, 13.34°, 20° and 26.67° phase shifting respectively and four Yz(-) three-phase winding connections with –6.67°, –13.34°, –20° and –26.67° phase shifting respectively. Simulation results using MATLAB SIMULINK show that source current THD successfully reduced to 1.99% and 1.74% respectively when arrangements of three phase shifting transformers and nine phase shifting transformers are used.
The vibration monitoring system on the belt using neural network and interface with Labview and android apps
Authors: Akhinov I A , Kunarto W , Handaya D
Published: May 2020

Detection of belt conditions as a connector on the AC motor can be done by knowing how characteristics vibration signals. All vibration signals are processed by using Fast Fourier Transform (FFT) to the frequency domain. The vibration signal spectrums are collected and processed by the Neural Network method so that conditions of the belt can be grouped. The cause of the actual condition can be monitored on Labview and Android apps. The proposed method is based on analyzing frequency-domain features with the Neural Network. On this paper, it uses two hidden layers on the Neural Network. The Result of the experiment based on three grouped of the condition can get accurate by 94.03% to 96.52%.