Table of contents

On behalf of the committee, I am very excited to welcome all of you to the International Conference on Technology and Vocational Teachers (ICTVT) held right here in Yogyakarta, Indonesia. This annual event is organized by Engineering Faculty, Universitas Negeri Yogyakarta and held from 14^th to 15^th September, 2019. The main purpose of this conference is to bring a unified communication platform for professional practice in engineering fields, researchers, vocational teachers, academia, and government.

Under the theme "Enhancing Technology and Vocational Competency for Smart Industry", the conference this year features a strong program, including three inspiring keynote speeches delivered by Dr. Dr. h.c. Georg Spöttl, M.A from German, Prof. Dr. Ramlee Mustapha from Malaysia, and Prof. Dr. Bruri Triyono from Indonesia. On top of that, we attracted more than 114 submissions from eight different countries. After reviewed by relevant experts, about 90 valuable research papers have been accepted for presentation. I would like to express our utmost gratitude to the keynote speeches, presenters, authors, and co-authors for contributing excellent papers.

List of Words from the Rector, Peer Review General Policies, List of Comitee, are available in the pdf.

All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

Landfill gas (LFG) is one of the largest greenhouse gas (GHG) contributors. By knowing the GHG inventory, disaster prevention efforts can be carried out. The purpose of this study was to determine the GHG quantity of the Telaga Punggur landfill sector using triangular, LandGEM, and IPCC method. CH₄ and CO₂ that is calculated from Telaga Punggur landfill waspeaked in 2021. LandGEM application estimated CH₄ and CO2 emissions which are 1.7x10⁷ m³ and 1.1x10⁷ m³ at peak year, 2021. Total GHG for 2021 is 2.3x10⁷ m³/year with LandGEM program, 2.2x10⁷ m³/year with IPCC program, and 1.5x10⁷ m³/year with triangular program.

Conventional treatment such as sedimentation, aeration and activated sludge are only capable to remove organic matter. The color removal in the waste water treatment required as post-treatment at the end of the process. Dye can reduce the aesthetic value of a water body. Dye containing are not included in the textile industry's quality standards in Indonesia. The subjective of this study is to improve the quality of waste water for textile waste water treatment plants using the ozone oxidation process. Real waste water from the waste water treatment plant were used and treated by biological processes. The ozone treatment reactor has 2 L volume and flowed with ozone at a dose 0.05 and 0.5 mg/minute. The main parameters that is removed in this study are color and COD. Efficiency of colors removal reached 92% and 93%, whilst efficiency of COD removal reached 78% and 83.5%. Based on the quality standards of textile waste water in Minister of Environment Regulation No. 51/2014 and Government Regulation of Republic of Indonesia No. 82/2001 (Class 4 designation) parameters COD, BOD₅, total phenol, and total ammonia (NH₃-N) have met the quality standards.

Palm fronds contain high cellulose, so it can be used as an alternative raw material for making pulp. The purpose of this study is to look at the potential of palm fronds as raw material for making pulp. The process of making pulp used in this study is the organosolv process, which is releasing palm frond fibers with a solution of acetic acid with hydrothermal pretreatment. This study observed the effect of cooking time and cooking solution volume on percent yield. The range of variables used in this study was cooking time of 125,150 and 175 minutes with concentrations of acetic acid cooking solution of 10 percent and 15 percent. The results of pulp quality were analyzed by comparing the results of the cold soda process to obtain physical properties. The best pulp was obtained at 30 minutes cooking time and 175 °C with a tensile value of 0.63 kN / m, tear 228.49 mN and brigthness 13.18.

Black liquor is a remnant of pulping fluid which generally consists of 14-18 percent solids which is commonly known as weak black liquor (WBL) with a pH of 12 or more. About 65 percent of the solids contained in black liquor are organic compounds derived from wood such as lignin, resins and fatty acids, acids from carbohydrates, and other organic compounds; The remaining 35percent percent is white liquor which is used in the pulping process. Kraft lignin, also called sulfate or alkali lignin, is obtained from black liquor by the extraction method using an acid hydrolysis process, so that pure kraft lignin compounds can be obtained which can be further utilized in various industrial activities. This study is comparing two kraft lignin extraction methods of acid hydrolysis process with thermal assistance (heating temperature) and a gradual centrifuge. The experiment results showed that the levels of lignin contained in black liquor consist of total calories of 391 kcal / Kg which can be processed into energy sources in the recovery boiler unit in further process. The result of kraft lignin extraction process using the acid hydrolysis method with gradual centrifuge stage is better than the thermal acid hydrolysis method. Quantitatively calculated with ASL values difference of around 0.002 mg / g of both the method and the AIR Value using centrifuge give an average yield of 969.815 mg / g, while using thermal assistance gives an average yield of 679.790 mg / g. Qualitatively, the centrifuge method is more optimal compared to the thermal method shown by the results of ICP, FTIR and SEM testing.

Numerous acidic hot springs characterize to Lahendong geothermal field. Many of them for example, those occuring in the Pine Forest recreation area are utilized for bathing. This hot springs have a temperature for about 40 degrees of Celcius and pH value of less than 2. Besides being corrosive the acidic fluids also irritate human skin. This paper presents the preliminary results of our research aiming to reduce the acidity of the hot spring bath water in lahendong by utilizing Calcium Carbonate (limestone). The increment of pH of the water is calculated by using Runge-Kutta 4^th order method and approached by continuous-stirred tank reaction using cylindrical tank. The trial using simulated trial errors and assumed variables. Simulation could be applied and adjusted to field conditions.First trial produces pH 2.5, it isobtained if the frequency factor value by 0.2. Second trial producespH 5with frequency factor value by 1.1. Thus, the greater the value of frequency factor, the faster the reaction will workand produce a largerpH.

Noise affects human health and behavior. Significantly noise results in a decrease in quality of life. The World Health Organization states that noise pollution is the third most dangerous type of environmental pollution. Noise is seriously problematic in the health of the urban environment in the world. The city of Yogyakarta as a center of education in Indonesia has experienced a very large growth in urban numbers from various provinces in Indonesia. Noise testing is carried out in residential areas as well as being an education area in Yogyakarta. The tool used MU.04 / SLM / 04 (Sound Level Meter) shows a value of 62.1 dBA from the normal limit of 55 dBA. These results indicate that noise is disturbing. So it is necessary to do noise reduction along the crowded roads of vehicles with natural vegetation. Natural vegetation that is fast growing and capable of significantly reducing noise is bamboo. Bamboo vegetation can bind more carbon than tree plants. The green belt vegetation of bamboo plants will create a more comfortable, shady and beautiful environment in the city of Yogyakarta.

Wood as construction material which is provided by nature is decreasing if the usage is not controlled. Several kinds of wood which are often used for construction material are teak wood and sengon wood. One alternative combines wood with good quality and deficient quality, such as combination of teak wood and sengon wood as laminated beam. This research is to know flexural load of perpendicular layered connection of teak wood and sengon wood with bolt and nail connector. The teak wood was placed at the bottom and the sengon wood was at the top. Dimension of wood beam test specimen before laminated was 60 x 100 x 800 mm, after being laminated was 120 x 100 x 800 mm with 2 variations of connector of bolts and nails. Each connector was made in 3 test specimens. The bolt diameter size was 7 mm, the nail size was 5 mm, the length was 150 mm and the range of each connector was160 mm. Installation of connector was carried out parallel for each specimen test, so that there were 4 connectors in each laminated beam. The flexural load of laminated beam test specimen of teak wood with sengon wood using nail connector is bigger 19.2 % than laminated beam using bolt connector although the diameter is smaller. The use of laminated beam with nail connector becomes alternative substitute of whole beam.

Indonesia has thousands of ethnic groups with a variety of traditional buildings. Traditional buildings made of wood almost all experienced problems of material damage due to insect attacks and weathering due to weather influences.The community tends to dismantle building elements that have been damaged by hoisting insects. This happens because of the lack of knowledge about techniques in repairing or retrofitting wood structures. Wood material is susceptible to problems with elemental damage due to weathering and insect attacks. Damage to the structural elements of the wooden beam does not occur as a whole but only in certain areas. To maintain the strength of the wood in order to carry the burden, it is necessary to strengthen only the damaged area. So the structural elements of the wooden block do not need to be replaced in total but only on the damaged part. Testing the tensile strength of the flexural strength of the whole Tectona grandis wood block as many as 6 pieces, 6 pieces of Teak wood without adhesive, Tectona grandis using 6 pieces of adhesive with a size of 120 x 8 x 6 cm, and Tectona grandis wood as 6 pieces of adhesive with the size 10 x 4 x 6 cm, and the adhesive used is epoxy glue. The results of the study stated that the maximum flexural strength is occurring in Teak wood beams with adhesive (D-1, D-2, D-3) able to have stronger flexural strength of 59.8455 N/mm², 52.22533594 N/mm², 54.54848438 N/mm², compared to solid beams (F-1, F-2, F-3) of 39.72684375 N/m², 53.01527344 N/mm², 60.58877344 N/mm². This research also shows that the connection of Teak wood blocks with adhesives has better flexural strength.

This study presents an investigation on the motion control of 3 phase motor using wireless communication. The wireless communication network used is Bluetooth which supports Arduino Uno, so that the motor rotation can be controlled via a smartphone. Control system is used to adjust 3 phase motor rotation. The method used in the development of 3 phase motor rotation control system are analysis of needs, control system design, development of systems, testing and performance measurement, and improvement the system. The results of this study indicate that the 3 phase motor rotation control system can work according to the design. When Bluetooth HC-06 module receives a signal from a smartphone via Bluetooth Electronics, then the signal is sent to Arduino Uno and forwarded to DC Relay and proceed to Omron MKP3-I Relay. When using 3.0 version of bluetooth, the farthest distance that can be received by the Bluetooth HC-06 module without an obstacle is 21 m, whereas if there is an obstacle, the signal can only be received in 16 m. Meanwhile, when using 4.1 version bluetooth, the farthest distance that can be received by the Bluetooth HC-06 module without an obstacle is 26 m, whereas if there is an obstacle, the signal can only be received in 19 m.

This study aims to utilize the FIS matlab converter (fuzzy inference system) into the C arduino programming language with the aim of simplifying the fuzzy logic model that can be applied immediately with control hardware such as Arduino. In this study, an example of fuzzy logic is used with two sensor inputs, namely temperature and smoke sensors as inputs and two outputs in the form of buzzers and pump motors. The method used is sugeno in matlab. Then the formation of input variables modeled mapping scale is formed 0 - 100 and scale output 0 - 2. Converter. Fis fuzzy inference system can be applied to the design of fuzzy logic systems with the results of the .ino format conversion program template that can be set output results as arduino triger directly . This setting is enough to do with the reading of the g_fisOutput [] variable with IF-ELSE.

The use of Electronic Cards for Student Attadance 'aims to design and build a system based on Arduino Uno microcontrollers and RFID modules. The system is expected to be able to facilitate lecturers in conducting attendance, reduce the attendance habits carried out by students, and increase the intensity of the use of student sign cards. The Attadance System based on the Arduino Uno microcontroller and RFID module is designed and built through several stages, namely: (1) analysis along with identification of the needs of components and other auxiliary equipment that support the success of system design; (2) designing components and mechanical design as component containers; (3) system implementation; (4) system testing and overall system evaluation. System testing shows the results in the form of a system performance that shows the student's name, student's master number, time of entry and when the student exits from the room. This system is equipped with a person counting device in the room, so it can be ascertained that there will not be an incident entrusted because the number of cards scanned can be matched with the number of students in the room.

This study aims to design and develop a system for student counters in the room. This Attadance System is based on the Arduino Uno R3 microcontroller by using an IR sensor to detect the object. This system is expected to facilitate the work of teaching staff in conducting attendance activities in the classroom that will not cut the time of teaching and learning. The main purpose of this Attadance System is to help student counting in the room automatically. The automatic student counting attendance system that uses a microcontroller and IR sensor is designed and built through several stages, namely: (1) analysis and identification of attadance and component system requirements and other tools that support the success of system assembly; (2) designing components and mechanical design as containers and supports; (3) system implementation; (4) system testing and evaluation of the overall Attadance System. The testing of the automatic student counter attendance system shows the results in the form of performance consisting of the experiment number, IR sensor detection distance, and the state of the light and environmental conditions of the light intensity. The sensor is able to detect distances of up to 6.5 cm if in good light intensity conditions. But in conditions of poor light intensity the sensor can only detect up to 5.5 cm.

The purpose of this paper is to analyse a circuit of system water level control system using a Silicon Controlled Rectifier (SCR) as an active component. WLC circuit is composed of the SCR that is connected to the NPN transistor 2, the relay is connected with a lamp 5 watt / 220 volt electric motor as a simulator. Detection of water uses a sensor that consists of three sensors namely S1, S2, and S3 in the water tank. The experimental results indicate that when water touches the S3 then lights on / simulator motor works with Vbe transistor1 voltage at 0.4 volts, the voltage at the Vbe transistor2 0 volts and the voltage on the SCR Vak of 0.4 volts. The lamp to simulate an electric motor simulator will be off if S1 touched the water with transistor1 Vbe voltage at 0.4 volts, the voltage at the Vbe transistor2 of 1.8 volts and the voltage on the SCR Vak 0.75 volts.

The use of laptop computer in our daily activities due to rapid changes in technology and industries has a great role in the fourth industrial revolution and directly or indirectly affect the way we learn, live and work. The research study intends to investigate the role of ergonomics and the impact of the use of laptop computer on biomechanics, visual and carrying discomfort among technology education professionals in Nigeria. The study used questionnaires, in order to collect data and empirical data were used for the descriptive analysis. The objectives are to examine how the use of laptop computer affect the biomechanics, visualization and carrying discomfort of the technology educators. The research so far discovered how laptop computer users faced problems like back pains, muscular pains, visual and carrying discomfort and lack of ergonomic knowledge and awareness among technical and vocational education professionals.

Estimating the position of a homogeneous object from an image for XY position is quite simple because it has the same dimensions XY. However, determining the XYZ position requires a unique approach. Generally, for estimating 3D position, stereo camera or expensive cameras are used with complicated computer vision algorithms. In this paper, we classify the position of an object using a mono camera. The image is divided into 3185 classes and five layers as a machine learning algorithm references. The k-nearest neighbors (kNN) approach usually is to find the closest point of the centroids to the closest class. Thus, this approach can be used as a three-axis prediction method that can afford the best performance solution.

Integrating technology in the assessment process facilitates the overall education process, for teachers, students, and educational institutions. Online Evaluation System is an e- learning application in the context of the "Learning Evaluation System" which is designed to facilitate the evaluation process. In creating a digital assessment tool, one needs to pay attention to the usability aspect as the key to success and as a user acceptance requirement for the application. In this research, researcher tested the usability performance assessment in the form of an electronic rubric to assess learning. Usability testing aims to determine whether an application is in accordance with the user needs or not. Usability testing uses an evaluation sheet in the form of a questionnaire, namely Use Questionnaire, a tool that can be used in the preparation of the questions that will be made in the form of a questionnaire. Testing was done by observing the user; how they used the application. The components tested consisted of components of usefulness, satisfaction, ease of use and ease of learning. The application tested was SmartRubric, an assessment application designed to facilitate the workload of teachers in carrying out the evaluation process. The test results show that respondents generally strongly agree with the usability aspect of SmartRubric application software. The research concludes that electronic rubric is a resource that facilitates assessment for students as participants in the assessment process. Students tend to be satisfied with the use of electronic rubrics in assessment.

This paper proposes a simple Convolutional Neural Network (CNN) program to classify epileptic seizure. The diagnosis of epileptic seizure involves the identification and different characteristic of the Electroencephalography (EEG) signal. As such, it needs a method for identifying and classifying epileptic seizure. Deep learning is part of a neural network that has the ability and pattern to identify and classify epileptic seizure. CNN has been demonstrated high performance on image classification and pattern detection. In this paper, we combine the continuous wavelet transform (CWT) and CNN to classify epileptic seizure. This experiment uses the wavelet transform to convert signal data of EEG to time-frequency domain images. The output of the wavelet transform is an image that will classify into five attributes. In this experiment, we develop a simple program that will compare with other CNN approach (AlexNet and GoogleNet). The results of this experiment are two kinds of data, accuracy, and loss. The resulting accuracy is 72.49%, and the loss is 0.576. This result has a better learning time than GoogleNet and smaller loss result than AlexNet.

This study aimed at developing an Online Assessment based on the Shareable Content Object Reference Model (SCORM) package. This study focused on: (1) obtaining an online assessment design based on SCORM package for the subject of Medical Instrumentation and Electronics based on needs analysis; (2) examining the functionality of the developed online assessment and (3) analyzing the usability of the developed online assessment. This software development process used the ADDIE development model. The testing stage of this study was conducted to verify and to validate the software. The software verification process was performed with functionality testing by media and material experts, and usability testing by users. The results indicated that: (1) it was obtained the design of an online assessment based on SCORM package for the subject of Medical Instrumentation and Electronics, including an online assessment in Besmart packed with SCORM Packages in the form of quiz integration (multiple-choice, short answer, true or false, drag and drop questions); (2) the functionality testing by material experts with a score of 3.88 and a media expert with a score of 4.16 suggested that the developed online assessment was feasible in the aspect of functionality; (3) usability testing by users achieved the score of 3.88 indicating that the developed online assessment was feasible in the aspect of usability.

Higher Education Accreditation is an activity that must be implemented by every college for every 5 years where this activity becomes a benchmark for college sustainability. This accreditation must be in line with the National Accreditation Agency for Higher Education (NAAHE) standards. Astra Manufacturing Polytechnic (Polman Astra) as one of the vocational higher education also conducts the accreditation. In compiling the accreditation instrument Polman Astra has a problem such as the inaccuracy of accreditation data between one department and another and the difficulty of coordinating among departments in providing data accreditation compilation. This problem may cause the late of accreditation according to a predetermined time. Due to this problem, an information system was built, namely Accreditation Information System (AIS). It is a web-based information system and designed according to NAAHE standard. AIS is built using the .NET framework and SQL Server DBMS with prototyping methodology. After implementation, AIS was able to integrate the needs of data accreditation by providing data requirements and eliminates delaying data preparation by the related department since it was directly generated from the Polman Astra database. AIS is also able to manage the accreditation data table dynamically and transparently, eliminates paper printing costs into zero and prevent delays in the preparation of accreditation instruments so that the accreditation can be completed according to a predetermined time

The rapid change of the times. A smartphone is a part of socialization. Social is a product of the collective society. Different from the social model of the past. The popularity of social software in recent years has also brought about tremendous changes. A social application such as Facebook, Twitter, Whatsapp, etc. All bring a new definition of social style to human society. Since different social software has the same mode of making friends, the face of friends is in appearance or interest. Do we think that dating mode can make changes? There are differences in 'people'. Differences create different individuality, personalities, and traits. Therefore, we use personality traits as the theme to design a mobile-oriented mobile application that allows users to complete the personality test. The topic, whether or not it does not meet its personality traits, has a standard existence. We use the user personality test to test the user's nine personality scale and can chat and interact with other users through personality matching. Different from general social software, this paper will explore the application value of social software user personality traits, and will have the opportunity to change the interaction mode of today's social software with different dating experiences, so that the social experience generated by users can be further improved.

The objective of this study was to analyze the factors that influence the use of mobile news applications. The research model used in this study was adapted from the Unified Theory of Acceptance and Use of Technology (UTAUT). This study was classified as a quantitative study with data processing using Structural Equation Modeling (SEM). The results of this study indicated that the Perceived Visual Attractiveness, Perceived Enjoyment, Performance Expectancy, and Effort Expectancy had a positive effect, but Image has no positive effect on Behavioral Intention in using mobile news applications. Also, perceived Behavioral Control and Behavioral Intention have a positive effect on Use Behavior.

Long Short Term Memory (LSTM) is known as optimized Recurrent Neural Network (RNN) architectures that overcome the lack of RNN's about maintaining long period of memories information. As part of machine learning networks, LSTM also notable as the right choice for time-series prediction. Inflation rate has been used for decision making for central banks also private sector. In Indonesia, CPI (Consumer Price Index) is one of best practice inflation indicators besides Wholesale Price Index and The Gross Domestic Product (GDP). Since CPI data could be used as a direction for next inflation move, we conducted CPI prediction model using Long Short Term Memory Method. The network model input consists of 34 variables of staple price in Surabaya and the output is CPI value. In the interest of predictive accuracy improvement, we used several optimization algorithm i.e. Stochastic Gradient Descent (sgd), Root Mean Square Propagation (RMSProp), Adaptive Gradient (AdaGrad), Adaptive moment (Adam), Adadelta, Nesterov Adam (Nadam) and Adamax. The result indicate that Nesterov Adam has 4.088 RMSE's value, less than other algorithm which indicate the most accurate optimization algorithm to predict CPI value.

FP Growth algorithm is widely used to analyze patterns from a huge amount of data with (frequent) repeated items. The objective of this research is to analyze playing pattern a badminton player, one of a popular sport in Indonesia. The data set was generated from a technical stroke during the game. The model used in this study was Jonathan Christie a top Indonesian badminton player. The method of data collection was done by dividing the playing field into various areas of the game. Observations were made by using the software, to calculate and classify the types of stroke that carried out by the athlete. The result of this research; the tactical approach of Jonathan Christie during this match was described. The data obtained would be very useful for the coach to improve the athlete's performance. Another advantage obtained was the analysis of the athlete's performance can be done with a quantitative approach so that it can enrich the current methods. As the conclusion, the FP Growth algorithms were able to describe the game pattern of a badminton athlete, JC by using PHP and MySQL. Sport science has become a necessity to develop to increase athletes' competitiveness.

This study aims to develop a quality web-based Alumni Information System and make a reference for higher education study programs in the form of policy recommendation features with the Simple Additive Weighting method in the Information System. The feature is made so that the policies taken can be in accordance with the priority scale of their main problems. The result of this research and development is a product in the form of a quality web-based Alumni Information System and features policy recommendations for study programs.. This is proven by fulfilling the eligibility assessment criteria of the software version of the ISO 25010 model, which includes 5 aspects, namely functional suitability, reliability, performance efficiency, maintainability, and usability in this system. The policy recommendation features produced also have a high degree of accuracy, because the results bear a 96% similarity with the actual accreditation score.

Social media is one of the important media for entrepreneurs in marketing their products, one of the popular is Instagram. Account activity on Instagram greatly influences marketing and sales levels, such as network, number of follower, following or posting. This study applies the Exponential Random Graph Models (ERGMs) to analyze how the network structure, follower, following, and total posts were affect to the online shop network accounts on Instagram. The data analyzed were 28 samples Instagram accounts which domiciled in DIY and Central Java Province. The predictor variables are non-directed network structure (edges, 2-star) and individual activeness (number of followers, number of following, and total post). The network structure graph constructed a directed network with 41 nodes and 104 edges. Based on ERGMs and significance test with α=5%, the network structure and characteristic of account have a significant influence on the networks between the online shop. The parameter estimation results can be interpreted as follows, an online shop does not take the initiative to make friends or network with another account, because focused on making network with the consumers. If there are more followers, then there is a high probability to get a connection between accounts. This result can be used as a marketing strategy through social media.

An economic indicators regarding information on the prices of goods and services paid by consumers are known as the Consumer Price Index (CPI). Predicting CPI using the Gaussian-Radial Basis Function Kernel with Support Vector Regression (SVR) method because the algorithm produces functions with surging data trends following the data path formed, so the Prediction results are more accurate. As a reference in predicting the CPI used the Foodstuffs issued by Statistics Indonesia and as an input variable taken from the Foodstuffs commodity prices on the East Java Disperindag siskaperbapo website in five cities namely Kediri, Madiun, Malang, Probolinggo, Surabaya and in three districts namely Sumenep, Jember, Banyuwangi from the beginning of 2016 and the end of 2018. Input data is divided in the training and testing data. The results of the Kediri CPI prediction with Mean Square Error (MSE) is 0.8697 and Mean Absolute Percentage Error (MAPE) is 0.432, so that the city of Kediri have CPI prediction approaching reference. The average MSE and MAPE for the three districts and five cities is 3.3462 and 1.2336125.

There are around 650 million people from all over the world who lived with disabilities. One of the fundamental rights of people with disabilities is the existence of a companion to supervise his activity. Meanwhile, the use of mobile phones for monitoring the activities of people with disabilities has been widely carried out. The human activity monitoring mobile application requires human activity recognition methods that provide high accuracy, precision, and recall to reduce the error rate of the activity estimation. Some researches use machine learning algorithms like K-Nearest Neighbour (k-NN) algorithm, Artificial Neural Networks (ANN), Support Vector Machine (SVM), and Random Forest for human activity recognition methods. However, the results of these studies have not been compared apples to apples. Therefore, this study presents a performance comparison of SVM, KNN, and Random Forest machine learning methods. Based on our findings, the SVM method with Support Vector Classifier (SVC) and Radial Basis Function (RBF) kernels can achieve the highest precision and recall, 87% and 85% respectively. The fastest processing time is obtained using the SVM method with the Stochastic Gradient Descent. However, in general, the best performance is shown by Random Forest. The Random Forest method with a depth of 100 and 300 trees can reach an accuracy of 96% within 0.45 minutes.

According to research, the current situation of declining of children's birth rate is becoming a serious social issue in Taiwan. Therefore, most parents are willing to give their children the best care, and the trend of children's goods is refined and more creative. It can be seen that modern people are not afraid of expensive but pay more attention to quality and creativity. This study takes the common traffic signs as design target. Modern children's living environment is becoming more scientific and less exposed to outdoor activities. The preschool children's vision is not broad enough to judge the meaning of the traffic sign. Therefore, in the news reports, people often see cases of children misunderstanding the road, leading to tragedy. Parents play an important role in the child's growth and must teach children to identify relevant signs at the right time.This study hopes to teach children the correct concept of transportation through relevant designs. Although the elements of traffic signs are very simple, the more complex the environment, the more streamlined it is to achieve simplicity and order. The ultimate goal of this study is to make children curious about the goods and teach the correct concept of transportation.

Modern people's lives pay more attention to the quality of life, but the waste of food and the improper recycling of food waste have caused energy and environmental problems. We use the advantages of decomposing food to solve the problem of raw kitchen waste and make organic fertilizer for planting. The household kitchen waste disintegration device that we tried to design we used the drum type proposal and put it indoors to solve the problem of raw kitchen waste. There is a cover to switching to reduce the odor and cause the mosquitoes to approach. After entering the raw kitchen, turn the drum, stir the soil and raw kitchen, easy to operate and simple, and improve the quality of life. After a period of time, the organic fertilizer is collected after the worm-eating the raw from the kitchen. The mesh can be replaced by a hole. When turning, the soil will fall into the larger box below, and the culture water will flow into the lowermost box, and the sputum will remain in the drum. In the next, continue the next breeding.

Human uses vehicles for mobilization from one place to another but there is using vehicle such as exhaust gas emission. This study aimed to identify the quality of vehicle exhaust gas emission in Sleman, Indonesia in 2019. The study was descriptive quantitative research. The data of vehicle exhaust emission and vehicle specification were gathered by means of using gas analyzer, opacity meter, and observation. The data resource was 133 vehicles that use gasoline engine and diesel engine. The data analysis was comparison between the result of testing and regulation of vehicle exhaust gas emission in Special Region of Yogyakarta in 2010. The result of this study showed that rate of amounts of CO, HC, and Particulate Matter in Sleman, Indonesia in 2019 is less than regulation, although there were 13 of 133 vehicles that did not pass the test. Vehicle owners who do not pass the emission test are advised to carry out regular maintenance and use fuel according to ratio of the vehicle compression.

Oxygen gas tank is one application of the decompression tank, which is filled with oxygen with a certain pressure. Oxygen storage tubes is very vital in the health sector, both at the clinic and at the hospital, because most people who are sick or who will undergo surgery in desperate need of clean oxygen. In this study the decompression tank was analyzed using numerical simulation methods using OpenFOAM software. Three different compressibility values of oxygen gas (6.90e-03, 6.90e-04, and 6.90e-05) varied in this study. This is done to find out the results of the pressure distribution and velocity in the tank. From the results of the study with variations in oxygen gas compressibility values, we can know that each compressibility value has different pressure distribution and velocity characteristics even though with the same time and the smaller the compressibility value, the pressure distribution and velocity produced are wider and faster propagating

A workload that exceeds the ability of workers or vice versa can cause a problem for workers. In this paper, we present a measurement of the physical and mental workload of workers at UKM Batik Jumputan Ibu Sejahtera Yogyakarta, and it has a purpose to find problems that occur so that recommendation for further improvement and problem-solving can be proposed. The physical workload measured by using RULA (Rapid Upper Limb Assessment) method, while the mental workload is measured by using NASA-TLX (NASA Task Load Index). This study succeeded in revealing the problems occur on workers such as there are differences in the level of worker risk which is caused by differences in age and differences in worker perceptions towards the dimensions of workload, and some workers experience high or very high levels of risk which is caused by improper work postures. Recommendations that can be done to solve the case are adding or replacing workers, increasing the workability of workers, adding work aids, changing work methods, and increasing workers' understanding so that they can fill out questionnaires accurately.

Product quality measurement is an important aspect of the production process. This study aims to determine the types of defects that often occur and find a recommendation for improvement to CNC machine product of Takamaz GSL 15 at Technical Implementing Unit Metal Yogyakarta. In this study, a Pareto diagram is used for analysis the types of defects. Analysis of priority value regarding severity (S), occurrence (O), and detection (D) characteristics is performed by using Failure Mode and Effect Analysis (FMEA) method. Meanwhile, Fishbone is used to analyze more deeply about the potential caused by the type of defect. This study succeeded in finding four types of records on the product; they are cracked pinhole, imperfect castings, hole defects on the surface, and minus drain lines. This study recommend to include periodic and ongoing supervision of the metal casting process, make metal wheel chain in one production line, use modern equipment or machines, replace the drill bits periodically during machining process and replace sandpaper with a softness level according to SOP.

Air conditioner (AC) as an active conditioning system is commonly used to absorb heat inside the room or building. However, AC requires relatively large electrical energy. Passive air conditioning system could be seen as an alternative solution to alter the issues mentioned above. Phase Change Material-PCM is able to absorb heat as latent heat that change its form without increasing the temperature. In applications, PCM can be used as mixture on concrete in order to hold the thermal energy from the environment so the temperature inside building can be lower and stable. PCM can decrease thermal conductivity of concrete. Crude Palm Oil (CPO) that can be applied as PCM is added within concrete so that it can have insulating behaviour, decrease the cooling load and electricity energy consumption. In this study, CPO is injected into lightweight concrete with some variation volume to represent its insulating behaviour. Thermal conductivities of lightweight concrete when used CPO volume 0 ml (as control), 2.5 ml, 5 ml, and 7.5 ml are 0,12 W/mK, 0,06 W/mK, 0.07W/mK, and 0.08 W/mK. Thus, the lightweight concrete has better insulating behaviour. This research is expected to be a solution for decreasing cost of electricity energy consumption in buildings.

The ability of teachers to determine the right learning model will have an impact on the students' learning outcomes and the achievement of learning objectives. The low students' learning outcomes in Mechanics Engineering is influenced by the learning model used by the teacher in teaching. This paper aims to determine differences in the effect of problem-based learning model and collaborative learning model on the learning outcome in Mechanics Engineering. This method used in this research is a quasi-experimental method with a non- equivalent control group design. The study sample consisted of 62 people divided into two groups, namely the experimental group 1 and the experimental group 2. The sampling technique was carried out using random sampling, 31 people for the experimental group 1 and 31 people for the experimental group 2. Data collection using the learning result test (pre-test and post-test) in the form of objective questions for about 25 questions. Data obtained were analyzed using descriptive statistical analysis techniques and inferential statistical analysis techniques, namely the t-test. Based on data analysis, the results showed that there were significant differences in the effect of problem-based learning model and collaborative learning model on the learning outcomes in Mechanics Engineering. The experimental group 1 using problem-based learning model had higher learning outcomes than the experimental group 2 using collaborative learning model.

This research is motivated by the high percentage of students who get low scores in Mathematics Analysis Courses. The purpose of this study was to reveal the contribution of learning independence to the learning outcomes of Mathematical Analysis of Building Engineering Education Study Program students, Civil Engineering Department, Faculty of Engineering, Universitas Negeri Padang. This study was designed as a quantitative research. The population was 63 students of Building Engineering Education Study Program in 2015, the samples were taken by totally. Instruments in the form of questionnaires that have been tested for validity and reliability. The findings of the study showed that the contribution of learning independence to the learning outcomes of Mathematical Analysis of students of Building Engineering Education Study Program, Civil Engineering Department, Faculty of Engineering, Universitas Negeri Padang was 35.28%.

This study aims to explore whether high school students can enhance students' learning motivation through challenging learning situationsin programming courses. This study was conducted for 12th-grade students in high school. The experiment lasted for eight weeks. Measurements included Pre- and post-tests measure MSLQ (Motivated Strategies for Learning Questionnaire) and the performance of programming. The experimental group learning design the game interactive project in Unity with C# programming language, and the control group learning build Arduino interactive project in mBlock with block-based programming. The results showed that there was no significant difference in performance, but the learning motivation of the experimental group was lower than that of the control group.

Teachers in Indonesia should not only mastery the four competencies (pedagogy, professional, personality, and social). They also must be able to use information technology in the learning process especially in the 4.0 industrial revolution. An instrument to measure the capability of the teacher in using information technology was developed. This article uses the Thurstone Scale as a methodological basis for identifying what capabilities are approved by experts in measuring the ability of teachers in use information and communication technology (ICT) in the learning process in vocational high schools. There are 30 (thirty) statements has analysed, 26 items were Valid in 0.01 significant level, and 4 items were Valid in 0.05 significant level. The instrument developed has good characteristics and all of the statement items meet the valid category with a very good level of reliability. Therefore, all instrument has met the validity and reliability criteria, the instrument will use to measure the ability of teacher in using information and communication technology.

This study aims to explore the combination of virtual reality and school education, Recent years, Virtual Reality (VR) is a popular issue. The basic concept of virtual reality is to use an immersive device to isolate. Isolate the user from the real world. compare the situation of virtual reality education and traditional education to students' learning, and explore whether virtual reality is suitable for use and promotion in schools. Can people generally accept digital technology to replace traditional education, use the convenience brought by virtual reality education and the growth of students.

Communication skill is a human basic ability to interact with one another. People usually have no difficulties in communication, yet not for deaf people. The basic communication ability of deaf people tends to be poor due to their hearing impairment. Thus, the technological role is an effective way to enhance communication skill for deaf people or so-called as assistive technology. This study generated a house of quality (HOQ) matrix which can be adopted to develop an assistive technology in the form of language instructional media. The HOQ matrix generated significantly contributes to translating from profound need analysis to assistive technology features to enhance communication ability through Indonesian language competencies for deaf students at elementary school. The user needs were formulized from a preliminary assessment at previous research which took twelve best deaf students from three special elementary schools in Special Region of Yogyakarta, Indonesia. This study has found that the priority of assistive technology development is visual and interactive media, either application or educational game, which comprises the vocabulary of concrete thematic nouns and non-affix transitive verbs and composing a simple sentence. Therefore, the HOQ generated is particularly noteworthy for Indonesian language major competencies by deaf students, which are: understanding reading text skill, writing, and speaking.

Learning media and evaluation are very important parts of learning. Both of these must be present in learning. This article aims to study the combination of learning media and evaluation so that each learning material provided can be measured until the end of learning. The concept proposed is continuous and integrated model of learning media and evaluation for vocational education application. This concept is built based on studies of learning media and evaluation that had been done by previous researchers. Based on the previous studies, continuous and integrated conceptual models of learning media and evaluation are built. This would force and encourage students to be more active in comprehending the learning material presented in the media.

Human society has entered the era of information digitization. The rise and spread of electronic technology, digital media, the Internet, blockchain, Augmented Reality/Virtual and Reality, etc. affect all aspects of human society. At the end of the 20th century, the development and achievements of information technology constituted an important background for the existence of education, and promoted the development of online teaching, network examination, and other aspects, which made a big difference. However, digital technology has not been applied in primary education and secondary education. The existing teaching method is still taught in the form of textbooks and manual drawings. This research focuses on the application of digital technology in primary, secondary and advanced teaching in the digital age. This study conducts research and analysis on local schools and students through observation, experimental and comparative research methods, and compares the differences between ordinary teaching and digital teaching.Taking virtual reality technology as an example, breaking the impression that traditional teaching gives people can effectively implement diversified learning, cultivate students' practical ability and innovative ability, also can improve their independent learning ability.

This study aims to find the factors that cause the low pedagogical supremacy competence of vocational education lecturers and examine the attractiveness of heutagogy-based training module innovations to improve pedagogical supremacy of vocational education lecturers. This research uses the R&D method. The research focused on tertiary education in vocational fields in East Java. The results and findings in this study include: (1) the factors that cause the low pedagogical supremacy competency of vocational education lecturers include the management factors of students (understanding insight or educational foundation, understanding of students, curriculum/syllabus development, learning design, learning implementation that educates and dialogical, and evaluation of learning outcomes) and aspects of personality (active self-development activities, self-evaluation, designing self-roadmap, professional self-concept, and independent innovation); (2) the innovation of heutatogy-based training modules developed has a high level of acceptance. This is evidenced by the average score of indicators of 36.93 or the level of acceptance of 92.33%, and (3) the innovative heutagogy-based training module developed can be used as a relevant alternative reference in the development of other sophisticated media.

The study was aimed at revealing (1) how the instructional media of industrial electronics integrated with learning style instrument was developed, (2) the feasibility of the instructional media of industrial electronics integrated with the learning style instruments, (3) the effect of the instructional media on learning achievement, and (4) the effect of the instructional media on learning satisfaction.

The study employed the Design and Development Research (DDR) model. The development procedure used the Specific Project Phases Cluster. The prototype of the product was tested by subject matter, software, and media experts related to the teaching media as a whole, and through a small group field test among a number of students. The data were collected through questionnaires in the form of Likert scale and were analyzed descriptively quantitatively.

The results of the study showed the instructional media was developed through the design and development research (DDR) model with the Design & Development Tools cluster which served as a part of the Product and Tool research main cluster, the instructional media was feasible to use without revision, there was a statistically significant difference in the learning achievement before and after the use of the instructional media, with the effect size of d=1.49 (d>0.8), so the effect of the media was categorized to have a large effect, and the instructional media could bring positive effects on the learning satisfaction.

This research is intended to design project-based vocational courses which focus on CAD construction drawing course using e-learning. The main objective is improving the student's competence in drawing by decomposing the Project-Based Learning (PBL) using flipped classroom strategy with providing course materials in e-learning. The development procedure is arranged as follow: survey and identification, planning, designing, and developing phases. For preparing the planning and designing phase, observations, course reviews, and surveys had been conducted as the result of this current paper as follows: 1) How to decide the vocational course; 2) Student's readiness to access personal computer; 3) Designing PBL steps. Observation, courses review, and group discussion were done for determining the course subject. Surveys were held to know the availability of the course to be conducted with minimum facilities and the student readiness to access personal computer, and determined the principles activities considered for the success of this course project by decomposing the PBL approach and flipped classroom strategy, group discussions had been done to get the views of the vocational teachers and lecturers. The results show that the CAD construction drawing is selected as the vocational course; the student's readiness to access personal computer and their positive opinion of the e - learning is in the very high category; the teachers and lecturers approved the development of CAD construction drawing course using e-learning to be conducted and give the recommendation to do the seven PBL steps.

Vocational education has an important role in the effort to create a workforce that has competencies that are in accordance with the characteristics of the needs of the industrial world. The learning process that emphasizes mastery of specific competencies requires an appropriate learning model. Teaching factory model is one of the solutions to prepare students to have competencies that are in accordance with the needs of industrial competence. Learning teaching factory developed can be integrated into the production unit organized by the school. This study is a literature study that reviews the development of teaching factory models in vocational schools. The results of the discussion concluded that teaching factory development was the main point where the process included the formation of management, production processes, marketing processes, and evaluation processes. Teaching factory developed is integrated with the production unit for the implementation of students practices.

This study aims to develop an electric circuit trainer kit learning media, study the feasibility of trainer kit learning media, study the feasibility of worksheets for electric circuit learning media, and determine the effectiveness of electric circuit learning media. This study refers to the ADDIE model (Analyze, Design, Development, Implementation, Evaluation). The results showed that the learning media feasibility of the electric Circuit trainer kit-based cooperative learning was included in the category very decent with an average score of 102. Job sheet Media learning is in a very decent category, with an average score of 93.5. Electric circuit trainer-based Cooperative learning is rated very useful for basic electrical and electronics practice with an average n-gain score of 0.77.

This study aims to determine the extent of the contribution of electricity education and training programs organized by vocational training centers in overcoming an unemployment problem. This research was conducted using the Context Input Process Product (CIPP) model evaluation approach. This research was designed by determining the classification of the success of the program implementation into 4 categories, namely, Very Good, Good, Poor, and Very Poor. The research data is presented in quantitative descriptive so that the obtained information can be understood easily. Based on the findings refer to the CIPP model, the aspect of the context in implementing the program was considered to be very good. Meanwhile, the Input, Process, and Product Aspects are in a good category. Thus, in general, the implementation of the Vocational Training Centers or Balai Latihan Kerja (BLK) Education and training program in the electricity sector can be said to run well and sufficiently contribute to overcoming an unemployment problem.

This study aims to develop a learning video of the total station for building stake out, and evaluating its feasibility. This study applied a Define, Design, Develop and Disseminate (4D) research and development model by Thiagarajan. The findings are as follows. (1) The developed product is a learning video of 351,690 kilobyte (KB) in an MP4 format with the duration of 10 minutes 18 seconds. (2) The feasibility scores of the developed learning video, on a scale of 1-4, are 3.64 by the learning media expert, 3.64 by the learning material expert, and 3.24 by the students.

The development of industry era 4.0 demands that education for 21st-century skills is not enough, but must consider management of learning in social aspects and virtual learning. Smartphones can be used as mobile learning in learning to support the industry era 4.0. This study explains the design and analysis of the performance of android-based learning application on EFI service material. This type of research is Research and Development with a 4D model. The research subjects were class XI Automotive students at SMK Perindustrian Yogyakarta consisting of 30 students. The technique of collecting data uses observation and questionnaires. Data were analyzed descriptively qualitatively and quantitatively to determine the feasibility of an Android mobile application. Android-based learning application on EFI service material developed using Appinventor 2 which is accessed online via Url: http://ai2.appinventor.mit.edu. The development of an Android-based learning application on EFI material gets a very good category. Android-based learning application on EFI service material is effectively applied in learning.

The objectives of this study include 1) mapping aspects of the need to improve the quality of prospective vocational teacher's outcomes; and 2) the attractiveness test of the developed Massive Open Online Courses (MOOCs) product. This research uses research and development (R&D) methods. The subjects of this study were all vocational students at Malang State University. Data collection techniques through questionnaires and interviews. The results of this study include: 1) aspects of the need to improve the outcome of prospective vocational teachers namely learning aspects (awareness has a percentage of 78%, knowledge has a percentage of 85%, attitudes has a percentage of 97%, and special skills have a percentage of 82%.), The aspect of action (behavior has a percentage of 86%, practice has a percentage of 90%, and decision making has a percentage of 88%), and aspects of conditions (economic conditions have a percentage of 82%, social conditions have a percentage of 84%, individual conditions have a percentage of 90%, and environmental conditions have a percentage of 94%); 2) MOOCs products developed are feasible and interesting (average score 92%); and 3) media/product innovation MOOCs that are developed can be used as a reference for the development of technologies that have deeper content and content complexes.

Artificial Neural Network (ANN's) was developed continuously and applied to each smart technology. The developing smart tests are continuous with ANN's possibility applied to increase efficiencies and time of decides. The Predictive Test was developed using the Smart Algorithm with the possibility of ANN to apply. Assessments of ANN implementation have been carried out based on a study in past time. The systematic literature review was used to found possibility implementation ANN's in the predictive test and combined with the study case. The result showed as ANN's could implement in the predictive test that used big data inputs. In addition, ANN's can be implantation on the predictive test such as education predictive test, talent and aptitude test or psychological test.

The objective of this paper is to design a learning assessment program in this education revolution 4.0, the so-called Plickers. It is one of the innovative on-line applications for students' reading assessment triggering students' critical thinking as well as their creativity. This research belongs to Educational Research and Development (R&D) which is divided into three main stages: exploration, development, and field-testing phase. The data analysis of this research used descriptive qualitative. Some interviews, document analysis, and classroom observation were employed to collect the data of this study. The reading test through Plickers was designed based on students' need. The finding shows that both teachers and students positively responded to digitize their learning assessment to accomodate both their critical thinking and creativity.

This research was aimed at examining constructivist learning through experiments examining the feasibility of pandan leaf fibers as reinforcement of composite materials. The method used in the study was an experiment, namely conducting an experimental activity of the tensile strength of pandan leaf fibers compared to glass fiber, to obtain new knowledge as an alternative material for reinforcing composite materials. In this case, the pandan leaves studied were taken from the Kepuharjo area of Cangkringan Sleman DIY. Data analysis techniques used were qualitative descriptive, and quantitative descriptive. The results of this research indicated that; (1) constructivist methods were feasible as alternative paradigms for learning science and technology built through the Input-Process-Output pattern; (2) tensile fiber strength was 1.5 times the tensile strength of glass fiber. The tensile strength of pandan fiber was 39,036 kg / mm2 while the tensile strength of glass fiber was 21,65 kg / mm2; (3) the tensile strength of natural composites was lower than synthetic composites. Natural composite tensile strength was 3.03 kg / mm2 while tensile strength of synthetic composite was 3.77 kg / mm2; (4) the increase in formalin concentration for pandan fiber immersion media in the range 0 - 35% had an effect on decreasing tensile strength with the equation y = -640.05x3 + 285,12x2 - 36,358x + 39,105 and R2 = 0.9641. In conclusion, fiber from pandan leaves is suitable to be used as a composite material, but a suitable matrix and suitable treatment have not been found.

The welding process can occur in shipbuilding with steel material. The purpose of this study was to determine the effect on welding. this research was conducted welding with different amperes with heat annealing treatment. The welding process used in ASTM A36 steel carbon welding or Shielded Metal Arc Welding (SMAW) with 9 mm thickness. Finally, a test was conducted including A36 carbon steel content test, NDT test, tensile test, and microstructure test. The result showed that the highest tensile stength value was 559,410 MPa in speciation 1 with 110 amide and the lowest tensile strength value of 556,473 MPa at 60 amperes. The NDT test using chemical substance showed that there was undercut on the welding in speciation 1 with amperage 60 amperes; while, speciation 2 with 110 Volt amperage there is no undercut in the welding area. From the results of the structure test microstructure showed that the pearlite and ferrite grains are formed smaller and tight because there is the influence of heat that is given in welding process, in which the smaller the number the greater the number of hardness of a material.

The paper presents the integrated model of industrial practice program and final project course as a solution to shorten the time consumed in doing Diploma 3 in Mechanical Engineering. The model was implemented in UPT Logam Yogyakarta,where four D3 students did their IP Program. Along the students doing the program, they designed a machine as the final project. Through an intensive supervision by their industrial supervisor and lecturer, the machine was finished in 4,5 mounts. It is reduced almost 50% of the time needed to do the project in regular way. The result of the study suggested that at the beginning of sem IV (January-April), can be started from registration-briefing-correspondence with industries. In May-June, student's choice - assigning a letter of assignment to the supervisor and determining the location of the IP Program. IP Program should be in line with its concentration. In July-August IP Program implementation, students work on the final project at the industries and the supervisor interacts with the FPC supervisor. End of August IP Program report can be completed first. Sem V (Sep- Dec) students continue to make project work in the industry. Sem VI (Jan-July) writing FPC report and doing FPC Examination.

This study aims to find out how much the needs of personal competence, basic knowledge, and work skills of vocational graduates Construction and Property Technology Expertise Program by the world of Construction Services Industry which is engaged in the Field Supervision Consultant. The method used to select the sample is the quota sampling and snowball sampling method where the sample is 15 companies with a population of 136 companies. The results of this study draw conclusions as follows: (1) overall competence of vocational school graduates construction and property technology expertise program included in the "very needed" category with value of 81,52 (2) personal competence included in the "very needed" category with value of 86,59, (3) basic knowledge competence included in the "needed" category with value of 80,52, and (4) competence of work skills is included in the "needed" category with a value of 78.60.

B-Smart E-Learning system is used to support the learning process in educational institutions to improve the quality of learning. The analysis conducted on the implementation of the UNY B-Smart E-Learning aims to measure the benefits gained from the use of E-Leraning. Previously, B-Smart E- Learning has not been known to provide good analysis inof bo term of Human, Organisation, Technology and users. This study aims to deepen, prove again and give meaning to the results of quantitative and quantitative research on the analysis of elearning implementation using the Human Organisation Technology approach. This research is a combination of research ( mixed methods) with sequential explanatory research type. The measure of elearning implementation at UNY uses a questionnaire arranged according to the Likert scale model with a population of 25,273 people and a sample of 100 people. Based on research that has been done, the overall reliability value obtained is 0.820 with a very strong reliable interpretation.

Each individual has different aptitudes and personalities. As a very important role, schools can map students' interests according to students' talents and interests. This is very important because proper placement of interest can support students' academic ability. This study aims to create a standard measurement that can be used for mapping and tracking students' talent in high school becomes easier and measurable. There are 5 aspects related to aptitudes in this research such as visual reasoning test, numerical reasoning test, verbal analysis test, spatial recognition test and vocabulary test. The Rasch model was used to analyze the difficulty level of the item, and from the results of the study showed that the difficulty level of the item was in the normal distribution at the interval - 4.5735 to 6.4989. By using the Google Form tool, students' aptitudes tests are developed and presented in varied form and can provide test result information automatically. The use of Google Form has several advantages, such as (1) the test does not have to be done simultaneously at the same time and place, (2) the item can be made more interesting because it can use images and audio visual facilities and (3) there is no need to duplicate the test paper since it is computer-based tests to minimize test administration.

This study was designed to: (1) produce a learning module of Electrical Engineering for the tenth-grade students at SMKN 2 Pengasih; (2) examine the feasibility of the developed module. This study was classified as Research and Development. The research design referred to the 4-D model development model with four main stages, namely, (1) Define; (2) Design; (3) Development; (4) Disseminate. It was conducted at SMKN 2 Pengasih Kulonprogo, in the Department of Electrical Engineering. The types of data used were quantitative and qualitative collected with questionnaires. Data analysis techniques were quantitative descriptive. The results of the study revealed that the process of developing the module was based on the stages of define, design, develop and disseminate. The results of the feasibility evaluation by material experts obtained a feasibility level of 91.92% (very feasible). The assessment result of the feasibility level by media experts was 89.15%. While the results of field trials (student respondents) were 78.99% (feasible). Based on the data, the average score was 86.68%. Therefore the developed module was categorized as very feasible to be used as learning materials for students at SMKN 2 Pengasih Kulonprogo.