INVOTEK: Jurnal Inovasi, Vokasional, dan Teknologi
Not a member yet
232 research outputs found
Sort by
Introduction to questionnaire data patterns using Perceptron Algorithm for lecturer improvement and development in higher education
Full text linkThis artificial neural network research article aimed to overview the current teaching process focusing on lecturer performance using the perceptron algorithm, improving the teaching process, developing the lecturer based on the perceptron algorithm's results, evaluating the speed and accuracy of the perceptron algorithm in evaluating performance lecturer and learning the rules of the perceptron algorithm in processing assessment criteria for lecturers in tertiary institutions. In this case, the perceptron algorithm was used to recognize the questionnaire data input patterns. The perceptron algorithm was trained and tested to recognize input data patterns so that this neural network could identify input data patterns from questionnaire data.This artificial neural network research article aimed to overview the current teaching process focusing on lecturer performance using the perceptron algorithm, improving the teaching process, developing the lecturer based on the perceptron algorithm's results, evaluating the speed and accuracy of the perceptron algorithm in evaluating performance lecturer and learning the rules of the perceptron algorithm in processing assessment criteria for lecturers in tertiary institutions. In this case, the perceptron algorithm was used to recognize the questionnaire data input patterns. The perceptron algorithm was trained and tested to recognize input data patterns so that this neural network could identify input data patterns from questionnaire data
ICT portal for the development of mathematic teachers competence: The development and the feasibility
Full text linkOne of the problems in improving the competence of Information and Communication Technology (ICT) for mathematics teachers is that the teacher has to leave his / her teaching activities to participate in various improving competence events. This study aims to develop an ICT house portal that will be managed by the Mathematics Subject Teacher Forum in Indonesia or known as MGMP that allows teachers to interact with fellow teacher communities to improve ICT competence without having to leave their teaching activities at school. Furthermore, the researchers also conducted a usability test of the developed portal. The application development model used is the ADDIE model which stands for Analysis, Design, Development, Implementation, Evaluation. Meanwhile, application usability testing was carried out by distributing usability questionnaires to 30 respondents consisting of postgraduate students and lecturers of mathematics education. The results showed that the ADDIE model can be used to design and create the ICT house portal called RumahTIK where the procedures in the development section include making applications, testing by experts, testing content filling, testing the use of clinical features. Based on the results of the usability questionnaire processing, the percentage of usability was 81% which was classified as very feasible. Although this research was not implemented for real teacher groups, the ICT house portal is very suitable for use by the MGMP group. In the future, it is necessary to implement this portal in various MGMP groups so that recommendations can be obtained to improve teachers' ICT competence in mathematics.One of the problems in improving the competence of Information and Communication Technology (ICT) for mathematics teachers is that the teacher has to leave his / her teaching activities to participate in various improving competence events. This study aims to develop an ICT house portal that will be managed by the Mathematics Subject Teacher Forum in Indonesia or known as MGMP that allows teachers to interact with fellow teacher communities to improve ICT competence without having to leave their teaching activities at school. Furthermore, the researchers also conducted a usability test of the developed portal. The application development model used is the ADDIE model which stands for Analysis, Design, Development, Implementation, Evaluation. Meanwhile, application usability testing was carried out by distributing usability questionnaires to 30 respondents consisting of postgraduate students and lecturers of mathematics education. The results showed that the ADDIE model can be used to design and create the ICT house portal called RumahTIK where the procedures in the development section include making applications, testing by experts, testing content filling, testing the use of clinical features. Based on the results of the usability questionnaire processing, the percentage of usability was 81% which was classified as very feasible. Although this research was not implemented for real teacher groups, the ICT house portal is very suitable for use by the MGMP group. In the future, it is necessary to implement this portal in various MGMP groups so that recommendations can be obtained to improve teachers' ICT competence in mathematics
Development of an elevator simulator to support problem-based electric motor control practicum for vocational high school student
Full text linkWorkers who can control electric motors are currently needed. Therefore, knowledge about controlling electric motors should be taught in vocational high schools. Installation and control of electric motors in the industry are generally used in various devices related to the production process such as controlling the motor driving conveyor belts, controlling pumps on factory pipes, and controlling freight elevators. The problem that arises is the lack of knowledge about electric motor control in vocational school teachers and insufficient facilities for the learning process of electric motor control. Also, Vocational High School (SMK) has not been able to change the old learning patterns to the new learning patterns required in the 2013 curriculum. One of the changes in the curriculum is a change from teacher-centered learning to student-centered learning. In this service program, learning the installation and control of electric motors in the simulator of elevators was developed using the Problem Based Learning (PBL) approach for students of SMKN 1 Cipatat. The first step in implementing this program is to study the curriculum and syllabus applied to the two partner vocational schools, then design a learning process for the installation and control of electric motors using the PBL method. The PBL method was chosen because this method can simultaneously be used to increase students' soft skills such as the ability to innovate, discipline, and the ability to convey ideas both in writing and orally. Besides, the PBL method can also support changes to learning patterns as required in the 2013 curriculum.Workers who can control electric motors are currently needed. Therefore, knowledge about controlling electric motors should be taught in vocational high schools. Installation and control of electric motors in the industry are generally used in various devices related to the production process such as controlling the motor driving conveyor belts, controlling pumps on factory pipes, and controlling freight elevators. The problem that arises is the lack of knowledge about electric motor control in vocational school teachers and insufficient facilities for the learning process of electric motor control. Also, Vocational High School (SMK) has not been able to change the old learning patterns to the new learning patterns required in the 2013 curriculum. One of the changes in the curriculum is a change from teacher-centered learning to student-centered learning. In this service program, learning the installation and control of electric motors in the simulator of elevators was developed using the Problem Based Learning (PBL) approach for students of SMKN 1 Cipatat. The first step in implementing this program is to study the curriculum and syllabus applied to the two partner vocational schools, then design a learning process for the installation and control of electric motors using the PBL method. The PBL method was chosen because this method can simultaneously be used to increase students' soft skills such as the ability to innovate, discipline, and the ability to convey ideas both in writing and orally. Besides, the PBL method can also support changes to learning patterns as required in the 2013 curriculum
Analysis Variations of Riser in Sand Casting for Scrap Aluminum on Hardness Values
No full textAbstract In this study, we will discuss the process of casting used aluminum metal. Used aluminum is one of the industrial wastes that can be converted into products using the casting method. This study aims to obtain a good casting material with good hardness values and minimal defects. The research will focus on the results of castings by analyzing the visuals and hardness values of the specimens. The research design is a pre-experimental type of One-Shot Case Study by conducting treatments whose results will be directly observed and analyzed descriptively. The treatment given is to increase the number of risers in recycled aluminum castings. Variations in the number of risers are 1 riser, 2 riser, and 3 riser. Each variation has 3 specimens, so there are 9 specimens in the study. The data from the test results contained a fairly large porosity value for each riser variation. The hardness value that has been tested using the Rockwell hardness tester obtained the highest hardness value occurs in the 2 riser variation, namely 27.69 HRA and the lowest hardness value occurs in the 3 riser variation, namely 21.56 HRA. Thus, for casting used aluminum with a casting pattern as in this study, it is best to use 2 risers.Abstract In this study, we will discuss the process of casting used aluminum metal. Used aluminum is one of the industrial wastes that can be converted into products using the casting method. This study aims to obtain a good casting material with good hardness values and minimal defects. The research will focus on the results of castings by analyzing the visuals and hardness values of the specimens. The research design is a pre-experimental type of One-Shot Case Study by conducting treatments whose results will be directly observed and analyzed descriptively. The treatment given is to increase the number of risers in recycled aluminum castings. Variations in the number of risers are 1 riser, 2 riser, and 3 riser. Each variation has 3 specimens, so there are 9 specimens in the study. The data from the test results contained a fairly large porosity value for each riser variation. The hardness value that has been tested using the Rockwell hardness tester obtained the highest hardness value occurs in the 2 riser variation, namely 27.69 HRA and the lowest hardness value occurs in the 3 riser variation, namely 21.56 HRA. Thus, for casting used aluminum with a casting pattern as in this study, it is best to use 2 risers
Foreshock and aftershock earthquakes characteristic for subduction (Case study: Aceh earthquake in 2004 and Tohoku earthquake, Japan 2011)
Full text linkAceh earthquake occurred in 2004 with magnitude 8.8Mw, the epicenter was located at latitude 3.295 and longitude 95.982 and Tohoku earthquake occurred in 2011 with magnitude 9.0Mw and located at latitude 38.29 and longitude 142.373. The both earthquakes have similar earthquake source mechanism such as the epicenter located in subduction zone, plate movement type. The research aims to determine the distribution of earthquake events before (foreshock) and after (aftershock) the main shock. Earthquake event datas were obtained from several earthquake databases, such as USGS and BMKG. The earthquake events from database sources are grouped based on the time of occurrence, radius, and magnitude. The result for foreshock shows that the number of earthquake events for foreshock within two years at a radius of 150 km with a magnitude M> 4 as many as 12 earthquake events and 129 earthquake events for Aceh and Tohoku respectively, The result for aftershocks are 119 and 1576 for Aceh and Tohoku respectively.Gempa yang terjadi di Aceh 2004 dengan kekuatan M 8,8 - 9,3 terletak pada latitude 3,295 dan longitude 95,982 dan Tohoku, Jepang dengan kekuatan M 9,0 terletak pada episentrum latitude 38,29 dan longitude 142,373. Secara mekanisme kedua gempa tersebut memiliki kesamaan yaitu pusat gempa sama-sama berada di subduction dengan arah pergerakan plat yang sama. Penelitian ini bertujuan untuk mengetahui distribusi kejadian gempa sebelum dan sesudah main shock atau gempa utama. Pengumpulan data kejadian gempa dikelompokan berdasarkan waktu kejadian, radius, dan magnitudo, data gempa diperoleh dari database USGS dan BMKG. Jumlah gempa sebelum dalam waktu kurang dari dua tahun pada radius 150 km dengan kekuatan M > 4 di Aceh terjadi sebanyak 12 gempa, hasil tersebut lebih rendah dibandingkan dengan gempa di Tohoku yang terjadi sebanyak 129 gempa. Jumlah gempa susulan di Aceh dalam kurun waktu dua tahun pada radius 150 km dengan kekuatan M > 4 terjadi sebanyak 119, hasil tersebut lebih rendah dibandingkan dengan gempa di Tohoku yang terjadi sebanyak 1576 gempa
Comparison bending strength of simple reinforced concrete beams with bamboo reinforcement in the form of circle and square sections
Full text linkSteel reinforcement is well known as an important component in forming building structures. However, as the community's need for reinforcing steel is increasing, the main material for forming steel reinforcement is decreasing so that the price is getting higher. The alternative that is suggested as a substitute for tensile steel reinforcement which is economical and easy to get is bamboo. The purpose of this study was to determine the ratio of beam bending using circular and square bamboo reinforcement and to determine the bending load that can be accepted by circular and square bamboo reinforcement. In this study an experimental method was used by conducting a series of tests ranging from preserving bamboo and testing aggregates as a building block for concrete. The cross sections of bamboo reinforcement used are square and circle shapes with a diameter of 10mm with beam dimensions of 900 mm x 150 mm x 150 mm. The results showed that the flexural strength produced by steel reinforcing concrete beam was 11,36 MPa, circular cross section bamboo reinforcing beam 8,73 MPa and rectangle cross section bamboo reinforcing concrete beam of 9,04 MPa.Steel reinforcement is well known as an important component in forming building structures. However, as the community's need for reinforcing steel is increasing, the main material for forming steel reinforcement is decreasing so that the price is getting higher. The alternative that is suggested as a substitute for tensile steel reinforcement which is economical and easy to get is bamboo. The purpose of this study was to determine the ratio of beam bending using circular and square bamboo reinforcement and to determine the bending load that can be accepted by circular and square bamboo reinforcement. In this study an experimental method was used by conducting a series of tests ranging from preserving bamboo and testing aggregates as a building block for concrete. The cross sections of bamboo reinforcement used are square and circle shapes with a diameter of 10mm with beam dimensions of 900 mm x 150 mm x 150 mm. The results showed that the flexural strength produced by steel reinforcing concrete beam was 11,36 MPa, circular cross section bamboo reinforcing beam 8,73 MPa and rectangle cross section bamboo reinforcing concrete beam of 9,04 MPa
Portable power supply design with 100 Watt capacity
Full text linkRenewable energy from solar cells is a type of alternative energy for consumers, especially those far from electricity, and saves electrical energy. This research developed an innovative tool for portable solar power generators as a source of energy, which stores electrical energy in two ways, namely solar cells and transformers. Furthermore, this research is expected to improve innovation tools for more efficient electricity supply and energy use, especially for rural communities. It also uses a variety of battery capacities to test portable power supplies. The results showed that the power supply using 100 Wp solar cells produced a capacity of 20 Ah, 60 Ah, and 100 Ah on the battery. Charging with a solar energy source on a 20 Ah battery takes a duration of 5 hours to be fully charged, while 60 Ah and 100 Ah batteries cannot be fully charged in one day. Charging a battery that has been run at a full level takes a duration of 15 hours at a temperature of 30oC to 34oC. Finally, this tool is expected to add variety to locally manufactured products.Energi baru terbarukan bersumber solar sel adalah salah satu alternatif energi listrik untuk konsumen, terutama yang jauh dari jangkauan listrik PLN, dan dapat juga untuk menghemat energi listrik. Kajian ini telah dikembangkan suatu alat inovasi untuk generator tenaga surya secara portabel dapat digunakan sumber energi solar sel. Metode kajian ini adalah rekayasa alat yang multiguna secara portabel dengan sistem penyimpanan energi listrik dapat digunakan bersumber solar sel dan rangkaian trafo. Penelitian ini diharapkan dapat meningkatkan inovasi baru untuk pencatu daya yang potensial dan penggunaan energi menjadi lebih efisien serta memberikan layanan energi listrik secara berkelanjutan terutama masyarakat pedesaan. Uji coba alat pencatu daya portabel dengan menggunakan kapasitas baterai yang bervariasi. Hasil pengujian dan pengamatan alat pencatu daya menggunakan solar sel 100 Wp dapat diamati pada keadaan baterai kapasitas 20 Ah, 60 Ah, dan 100 Ah. Untuk pengisian dengan sumber energi matahari baterai 20 Ah proses pengisian baterai penuh dalam durasi pengisian 5 jam, manakala untuk baterai 60 Ah dan 100 Ah tidak dapat penuh pengisian baterai dalam satu hari. Pengisian baterai yang telah dijalankan sampai level penuh, dibutuhkan durasi sampai 15 jam pada suhu 30oC sampai 34oC. Akhirnya, diharapkan alat ini dapat menambah variasi produk manufaktur lokal khususnya
Ideal mortar composition with rice husk ash addition and addictive for maximum mortal strength
Full text linkThe intensity of earthquakes increases from time to time both in number and in strength; recently, in Indonesia, damage to buildings by earthquake acceleration usually begins with damage to walls. Besides having a function as a barrier between spaces in construction, walls also have an essential role in increasing a building structure's rigidity. Mortar, which is usually used as a wall and plastering, has a role as a binder between the walls themselves' components so that quality mortar will help the walls be stronger. This research aims to produce the ideal mortar mixture with low price, high quality, and easy to obtain material. The proposed added composition was husk ash and Fosroc SP 337 additive, varied based on cement's weight. The yield of mortar with added ingredients will be compared with ordinary mortar without added ingredients. The specimens' manufacture used 20 samples of 5cm x 5cm x 5cm cubes with five variations of mortar composition, and mortar compressive strength testing was carried out at 7, 14, and 28 days of age. The maximum compressive strength obtained for mortar with the addition of 15% rice husk ash, 1% fosroc sp 337, and the combination of the two experienced an increase in the compressive strength value, the ratio of the average compressive strength of the mortar, the highest average compressive strength results in the mixture 1 PPC cement: 4 Sand with the addition of 15% rice husk ash: 1% fosroc sp 337 with an average compressive strength yield of 116.6 kg / cm² at the age of 7 days, 145.6 kg / cm² at the period of 14 days and 154.6 kg / cm² at the age of 28 days.The intensity of earthquakes increases from time to time both in number and in strength; recently, in Indonesia, damage to buildings by earthquake acceleration usually begins with damage to walls. Besides having a function as a barrier between spaces in construction, walls also have an essential role in increasing a building structure's rigidity. Mortar, which is usually used as a wall and plastering, has a role as a binder between the walls themselves' components so that quality mortar will help the walls be stronger. This research aims to produce the ideal mortar mixture with low price, high quality, and easy to obtain material. The proposed added composition was husk ash and Fosroc SP 337 additive, varied based on cement's weight. The yield of mortar with added ingredients will be compared with ordinary mortar without added ingredients. The specimens' manufacture used 20 samples of 5cm x 5cm x 5cm cubes with five variations of mortar composition, and mortar compressive strength testing was carried out at 7, 14, and 28 days of age. The maximum compressive strength obtained for mortar with the addition of 15% rice husk ash, 1% fosroc sp 337, and the combination of the two experienced an increase in the compressive strength value, the ratio of the average compressive strength of the mortar, the highest average compressive strength results in the mixture 1 PPC cement: 4 Sand with the addition of 15% rice husk ash: 1% fosroc sp 337 with an average compressive strength yield of 116.6 kg / cm² at the age of 7 days, 145.6 kg / cm² at the period of 14 days and 154.6 kg / cm² at the age of 28 days
The influence of project based learning on student's intrinsic learning motivation
Full text linkThe lack of total student involvement in the learning process is due to a lack of effort in finding information independently and not achieving active learning. The purpose of this study was to investigate the effect of intrinsic motivation on project-based learning in the automotive engineering education student workforce transfer system course. The method used was a quasi-experimental research design with a 2x2 factorial. The population used was students of the Automotive Engineering Department, Faculty of Engineering, Padang State University, 2020/2021 academic year. The results showed that students who applied project-based learning had higher learning outcomes than using conventional methods. This was based on the value of Fcount greater than Ftable, 7.866 > 3.34 at the 0.05 significance level. There is an interaction between learning methods and students' intrinsic motivation towards learning outcomes, this is evidenced by the value of Fcount is greater than Ftable, 7.602> 3.34 at the 0.05 significance level. There is a significant difference in student learning outcomes between project-based learning and conventional learning which has high intrinsic motivation. The final research result is that there is no significant difference in student learning outcomes between project-based learning and conventional learning which has low intrinsic motivatio
The development of height and weight measuring instruments for web-based Anthropometric tests
Full text linkEarly childhood talent identification sport programs are needed to decide the potential of children in certain sports. It is expecting that children will be able to maximize sports achievements according to their talents. To find out a human's talent in sports, several parameters can be used for a measurement. One of them is the anthropocentric test, which is a series of processes for measuring the dimensions of the human body with in the form of body height and weight. Based on the results of measurement analysis, children will be able to identify their sport talents. Therefore, a website-based height and weight measurement system was developed that is able to provide information on measurement results and talents identification. The development of this tool uses the ESP 32 Dev Kit Module as a micro controller, an ultrasonic sensor for height sensors and a load cell for a weight sensor. The data are sent to the database contained on the website for further processing and analysis based on the measurement results of talent in the sports field. The measurement website page can display measurement results and identify type of talent that belongs to the child. Based on the results of measurement and data analysis, the accuracy of the tools for measuring body height were 98.7% and body weight were 99.5%, while the precision of the tools were 98.6% for body height and body weight were 97.4%