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Online learning allows the learning process to be carried out anywhere and anytime. However, empirical studies report several obstacles that occur in the online learning process; one of which is the lack of student involvement. The learning materials of programming lessons generally have a low level of participation. Therefore, it requires a learning approach that is more attractive, easily understood by students, and promote engagement. Gamification-based programming learning platforms are widely available today. Research on determining the effectiveness of their use, investigating the system usability scale (SUS), perceived benefits, level of satisfaction, and user experience when using it is still limited. This study aims to evaluate a Grasshopper as one of the gamification-based programming learning platforms. Thirty-one respondents who had studied various programming languages at both the high school and university levels were involved in usability testingsessions. The results of the usability evaluation using SUS showed that the score was above average. The assessment of benefits and satisfaction also showed an average value of 8.6 which indicates that most respondents were satisfied with this application.

The development of digital technology in the Industrial Age 4.0 focuses on the application of the Internet of Things (IoT), Virtual Reality (VR) and Augmented Reality (AR). IoT as one of the main topics for technological advancement, which is useful for improving information and communication that is developing in the fields of manufacturing, infrastructure, business, economy etc. The development in the field of material technology can make small materials where the energy requirement to generate a device only requires a millivolt range of power, so by using energy from the surrounding environment which is converted into electrical energy, a device design for energy harvesting is required. The purpose of this research is to design a device that is sourced from various vibrations and converted into electrical energy. The concept of designing a vibration conversion mechanism into electric energy is by combining and optimizing the design of several existing tools (technologies). This research was tested experimentally by utilizing braking force. Tests are carried out using a data logger for further processing. From the results of the braking test, it is able to produce a maximum voltage of 0.9 V with a braking force of 34.72 N.

The electricity supply used in State Polytechnic of Malang (Polinema) is still fully supported by PLN by utilizing the electricity source of the Electric Steam Power Plant (PLTU) with coal as a fuel. As the use of electricity in Polinema’s environment is very large, this has an impact on the expensive cost that must be incurred every month. The use of solar power as a new source of electricity that utilizes the nature of renewable energy can be used as an alternative electricity in Polinema. Supported by the use of solar panels with relatively affordable price and can be used as a long-term investment, it is expected that the use of electricity from PLN can be replaced by this solar power plant (PLTS). In this research, a prototype of electrical energy monitoring device produced by solar panel using several sensors connected in one network or commonly called Wireless Sensor Network (WSN) was designed and made. WSN was built using ESP32 microcontroller which is assembled with a voltage and current sensor which then the readings from the sensors will be sent wirelessly to the router to proceed to the server with internet facilities. Information from the sensors are being continously stored and monitored, so user can see the results of WSN reading from any location connected to the internet (real time).

Based on WindSat data from 2004 to 2014, Indonesia has an average wind speed of above 8m/second at sea. In addition, the energy potential of the sun is around 4.8 kWh/m2. A mechanical model ship with a catamaran type will be installed photovoltaic module and wind turbine generator which are equipped with microprocessor to control the angle of the wind turbine blades, the energy generated by the PV and wind turbine generator will be regulated by the dual input buck boost converter using the PID method to regulated voltage to 14 Volt used to charge the battery. The power stored in the battery will be used to drive the ship model propulsion system. This paper discusses about pv performance, generator performance, dual input buck boost calculation, and simulation. From testing the energy obtained is 774WH. From the simulation of the dual input buck boost converter circuit, the setling time is 11ms when using the PID control system and 35ms when using PI. Energy from the sun and wind can be combined into one with a dual input buck boost converter so that the energy can be absorbed is more optimal.

This research discusses the design of rectenna with microstrip antenna with frequency BTS work frequency in Malang city by using a rectifier to convert electromagnetic power into DC output on GSM1800 working frequency and use the energy storage design to be stored. Harvesting this energy is alternative energy conversion. The produced electrical power can be used by low-powered-devices. Since the obtained power is small, additional circuits will be used so that the obtained power can be stored in energy storage. The power obtained from this research is around 1 to 16 mV. It is obtained from BTS around the Malang city.

The existence of traditional house until now could be believed as proof of a good human protector. Bugis traditional house is one of them. The research problem is how Bugis behavior and building structure performance to struggle in flood. The goal is to reveal the performance of house structure and Bugis ancestor behavior to survive after disasters. The methods are logical argumentation to explain the architectural knowledge, and modeling simulation to explain building structural performance. The results are Bugis ancestor has been leave inheritance a good behavior in survive after disasters through they architectural space arrangement. They prepare space in a safe area at their house for food storage, so when disasters happen they still have food stock without waiting for aids. The structure system as the stilt house its find in safe for the occupant because of space for human living lifted more than two meters above the ground surface. The structural performance indicates the displacement in early dangerous occur when flood loads higher than human living space. The best knowledge can be adopted in this research is the availability of food stock at own house. The better construction method to apply in flood area is the stilt house.

Since the first appearance of the Massive Open Online Course (MOOC), the problem of low completion rates in MOOC has often been an object of research in terms of the instructional design and interface design. However, in-depth studies that examine the implementation of instructional and interface design principles in learning on the MOOC platform are still limited. Therefore, the purpose of this study is to find out the extent of Udacity in applying those principles from the Indonesian perspective. This study also aims to evaluate the usability of the MOOC platform. There are 228 participants in this study from various regions in Indonesia. The study findings indicate that Udacity has been successful in implementing content, interactivity, and course design, but there is still room for improvement in terms of instructor presence. Some usability problems were also found, and most of them are related to the online discussion forum. This study also offers an alternative design and recommendations to tackle the problems.

The Faculty of Computer Science of Universitas Indonesia has implemented online learning facilitated by a learning management system called Student-Centered E-Learning Environment (SCeLE). One of its important features is the online discussion board that enables students to construct knowledge collaboratively. Connecting and comparing several ideas in an online discussion forum are challenging for both students and teachers, especially when the discussion runs very fast with long messages. This study proposes an online collaborative mind mapping feature integrated to the discussion forum. A prototype was developed using the Go programming language and Gin web framework. The usability testing was employed to gather data about user experience in using the application. The participants of the study were all students of the Faculty of Computer Science of Universitas Indonesia. The result of the study shows that the application benefits most of the users. The participants acknowledged that the features help them follow the discussion and it supports the collaborative work. However, in terms of the design and the user experience, more works are required to improve the feature needs.

Soil Mechanics had been a fundamental science material that needs a great understanding of the concept. Many attempts had been done in varying the study method for this course. An attempt to utilize online discussion learning will be discussed in this paper. To analyze the online learning experience, the Community of Inquiry (CoI) model was utilized. The CoI model divides the dynamic online learning process as social presence, teaching presence, and cognitive presence. This study aims to compare the application of CoI in the Soil Mechanics course between two different types of discussion under the Civil Engineering Department at a large public university in Indonesia. The students of the Soil Mechanics course were given two types of problem-based online discussions for two learning topics. The first one was a case study of Consolidation Settlement in a Group Discussion, while the second one was a case study of Seepage in a Class Discussion, which was done in one single discussion forum. Through quantitative analysis of the students’ discussion transcripts, it was found that cognitive presence was dominantly higher than teaching presence and social presence in both types of discussion. Finally, through an interview with students, it was found that students with active participation gain several benefits, among others, the better ability of systematic and critical thinking of interpreting a problem and growing sense of engineering compare to passive students.

This research aimed to 1). perceive the abilities of various types of adsorbents towards the percentage of CH4 (biomethane) and 2). determine the potential types of adsorbents to increase the percentage of CH4. The first experiment was P which consisted of P0, P1, P2, P3, P4 and P5; each of them contained grit of chicken waste adsorbent (BLAR) and chicken eggshell (CTAR). Then, the second experiment was T which consisted of T0, T1, T2, T3, T4 and T5; each of them contained BLAR and hydrated lime (KP). The measured variables were (1). biogas volume (dm3), (2). filtration rate (second), (3). percentage of filtered CO2, (4). percentage of CH4 produced. The observation results from the first and second experiment had a highly significant effect (P

The type of earthquake that is most often felt in Indonesia is tectonic earthquakes. This type of earthquake is caused by the movement of the earth’s crust due power generated by tectonic plate shifts. Province of Nusa Tenggara Barat is one of the earthquake prone areas in Indonesia. In this research, we will analysis of tectonic earthquakes characteristics in Province of Nusa Tenggara Barat by descriptive statistics concept approach and analysis type of data distribution earthquakes 2018. The Data used are tectonic earthquakes 2018 in Province of Nusa Tenggara Barat of Indonesia and sourced from the USGS earthquake catalog. The results of this study can be used as a reference for the Government of Indonesia and Province of Nusa Tenggara Barat in disaster mitigation planning in Province of Nusa Tenggara Barat.

The problem of geographical position in Indonesia is that there are still many villages in Indonesia that have not been able to receive PLN electricity flow. People in these remote villages can indeed enjoy electricity with their own efforts to buy diesel/premium/gas-fueled electricity generators, etc., from non-renewable fuels that are expensive and difficult to get to meet lighting needs at night. Therefore, we designed the wind power generation system for the needs of residential homes that can be controlled electronically and monitored via Cell Phones with WiFi transmission which is currently affordable at the title “Tele controller Design for Renewable Wind Energy Systems”. The system that we have designed can control the distribution of electric current in the same direction or for electric current that has been converted to alternating current, as well as the system can monitor to determine the characteristics of the wind and the resulting electrical output. The results of this study are expected to make it easier for the community in each house to generate electricity independently to be able to meet the needs of cheap night lighting and without environmental problems. With a system that is always monitored and controlled, it is expected to always be maintained and with maintenance that is easily protected from damage, it can eventually increase the service life.

The development of communication technology, both on algorithms and devices has been so rapid. The application of communication devices that previously used radio signal (wireless) would be more efficient if cable (on wire) is used instead. With a large number of buildings with wide locations, there are still many spaces that are not reachable by communication devices. Therefore, it is necessary to add a new communication tool that can be used to convey information in the campus environment intended for announcements, from one place to another or from one room to another simultaneously, both with point to multipoint as well as point to point characteristic which is suitable for internal communication and emergency situations. This wireless network can be expanded without using a cable backbone. In addition, with the equal sharing of access rights, the network will be more effective because it can be done anywhere as long as there is still a network connection. Audio effects can be applied in real time using DSP (Digital Signal Processing) Starter Kit TMS320C6713 by implementing in the equipment. In the audio input signal of 0.050 Vpp there is no change in the frequency of the original signal that is 1 Khz there is a change in the intensity of the sound produced 0.364 Vpp, 2 kHz to 0.280 Vpp while 3 kHz to 0.236 Vpp. There is a change in amplitude while the output frequency approaches the original signal frequency.

The optical fiber sensing system is free from the effects of electromagnetic wave interference and radio frequency interference. The temperature difference between the incoming light source at one end of the fiber optic cable and the temperature of the sensor will cause a difference in wavelength between the incoming light source and the light reflected by a sensor or passed by a sensor. The difference in wavelength will be converted into RGB value, then the RGB value will be converted into a temperature. It becomes a strong reason why this research takes the topic of temperature sensor design using fiber optics. The method to design fiber optic sensors used in this research is experiment, such as: - heating the ends of the fiber optic core with analytic splicers so it will obtain spherical and oval shape of the optical fiber end, -peeling the jacket between two ends of the fiber optics and coating optical fiber with plates. The calibration and validation method is using RMSE (Root Mean Square Error) of the temperature which measured by Infrared thermometer and optical fiber sensor designed in this research. The test results for temperature measurements between 303oK to 543oK by using optical fiber sensor designed by researcher show that the reflected light model has error 1,596683 and forwarded light model has error 1,029278.

The coin recognition system is a very important role in currency processing systems which is aims to minimize human miscalculation and time to calculate coin values. The coin identifier and recognition to calculate the value of Indonesian coins based on android developer presented in this paper. The two coin parameters are used for coin recognition which are radius and colour of the coins. The Circle Hough Transform (CHT) method with gray scaling and erosion process as pre-processing image used to calculate radius parameters, based on android developer and computer vision. After the radius value is obtained then the average RGB value of the coins is detected to determine the colour parameters. By calculating the diameter and determining the colour, the coins can be recognized and the total value of the coins in the input image can be known. The experimental results show that the system has been obtained indicate that the system successfully recognized coins based on determined algorithm. That is mean the application using computer vision can recognition coin and count the value of coins.

In the robotic field of study, localization is one of the important methods for autonomous mobile robot navigation. Probabilistic approaches have received significant attention in the robotics community. The discrete Bayes and Kalman filters are the fundamental algorithms in probabilistic approach which have to be clearly understood in order to develop more advanced filtering algorithms. This paper discusses discrete Bayes and Kalman filtering algorithms. The mathematical representation of each filter algorithm, in the 1-dimensional case, presented in detail. The algorithms were implemented using python to simulate the probability of the robot position. The algorithm’s complexity was analysed with respect to the computational cost and size of memory used. From this study, it has been observed that the Kalman filter is computationally more efficient, and less memory is required.

This paper presents a study of long range (LoRa) communication for monitoring of a ship electrical system. Three categories of electrical system include generator, power distribution, and navigation are monitored. A low power communication technology of LoRa is used to transmit electrical variables such as current, voltage, and power are logged and sent to the server. Experiments using LoRa SX1278 and Arduino have been inducted to validate the performance of the communication. Three spreading factors 12, 7, 6 have been tested. From experiments results, the performance of the communication has been analysed, if has been found that 97% successful data transmission was achieved with maximum distance. Furthermore, small baud rate communication was more suitable for the application.

In accessing or searching data by using Query or Join on applications that are connected to a database, the usefulness of the implementation of the data and the process time is important to note. There are many ways that a system management database can do in processing and generating answers to a query. All methods will eventually produce the same answer (output) but they would still have different values, such as the time to respond to data. Some queries that are often used for processing data are Hash Join and Nested Join, both queries have different algorithms but produce the same output. A client-based or network-based application was employed to test both algorithms or queries with running time parameters or the time to respond to data. The test was conducted by connecting the number of tables and the number of rows/records. The result of the study is that the query hash join’s speed in response to small amounts of data is better than the large data in the nested join.

The purpose of this study was to improve the learning achievement of students of SMAN 1 Gedangan Sidoarjo through the use of blogs as a learning medium. This research is a classroom action research (CAR). The study was conducted in two cycles in eight meetings, each meeting 2 x 45 minutes, and each cycle consisted of planning, action, observation, and reflection. The research subjects were students of class XI MIPA 4 of SMA Negeri 1 Gedangan Sidoarjo in the academic year of 2017/2018 with a total of 33 students. Data collection techniques are observation, tests, field notes, interviews, and documentation. Data analysis techniques use quantitative analysis, qualitative analysis, comparative analysis. The results showed that the use of blogs was proven to improve learning achievement. This can be proven from the increase in student learning outcomes in the first cycle with the percentage of completeness of the learning value of 88.85% and the average grade value of 84.85, resulting in an increase in the average grade of 12.45 (pre-value 72.40 cycle and the value of the first cycle 84.85) and the completeness of the results of the learning value of 41.30% (in the pre cycle 47.55% and cycle I 88.85%). Whereas for the results of learning cycle II the average grade value increased by 2.51 (the value of cycle I was 84.85 and cycle II 87.36) and completeness was 6.15% (in cycle I 88.85% and cycle II 95.00%). It was concluded that the use of blogs as learning media to improve learning achievement had achieved the expected results in this study, each of which had achieved an achievement indicator of> 75%

Background. In Indonesia, schistosomiasis is endemic in Napu and Bada Highlands in Poso District and Lindu Highland in Sigi District, Central Sulawesi. Schistosomiasis in Indonesia is caused by blood fluke (trematode worm) Schistosoma japonicum with Oncomelania hupensis lindoensis snail as an intermediate host. The presence of Oncomelania hupensis lindoensis is an indicator of an area to be called a focus area for Schistosoma japonicum. Integrated control of schistosomiasis is vital in schistosomiasis control. However, lack of coordination and collaboration between multiple sectors has occurred many times. The objective of this study was to identify the role of multi-sectoral in schistosomiasis control. The identification process was needed to engage multisectoral in schistosomiasis control program. Methods. A comprehensive snail survey was conducted in Napu, Lindu and Bada Highland in 2017 which found 242 O.h. lindoensis foci area in 21 villages where 208 snail foci located in 14 villages in Napu highland. This research was part of 2017 study of 'Mapping of Oncomelania hupensis lindoensis snail', the intermediate host of schistosomiasis in the endemic area in Indonesia. After the mapping was carried out, an action plan to control schistosomiasis was designed by invited related sectors from the province and Poso district to develop the action plan together. Results. In order to eliminate schistosomiasis, several sectors both from province and Poso district were committed to engaging in schistosomiasis control. Those sectors were Agency for Regional Development, Agriculture Office, Maritime and Fisheries Office, Plantation and Livestock Office, Public Works Office, Environmental Office, Health Service and Lore Lindu National Park Agency. To eliminate schistosomiasis, integrated control of schistosomiasis has played a significant role. The responsibility and task of each sector involved were made clear according to each sector duty and function with the goal of the elimination of schistosomiasis by 2020.

The study was conducted to determine the use of fish oil as by-product of fish canning factory in diet on the performance and lipid profiles of native chickens. The experiment used 100 native chicken with an average initial body weight of 48,9 gram (sd + 9.9), was used in this study for 8 weeks experiment. These were arranged by a completely randomized design with 5 treatments, 5 replications and 4 hens in replication each. The diets were: R0 = 100% Based Diet (BD) + 0% Fish Oil (FO); R1 = 98.5% BD + 1.5% FO; R2 = 98% BD + 2% FO; R3 = 97.5% BD + 2.5% FO; R4 = 97 % BD + 3% FO. Feed and water were provided ad libitum. Variables were performance parameters and lipid profiles. Results showed that fish oil inclusion in diets were significantly increased feed intake, body weight gain, carcass percentage, liver, breast and thigh weight, and decreased blood cholesterol, carbohydrate and meat cholesterol, and also tended to decrease abdominal fat. However, there were no affected on feed conversion, water, protein, fat and ash of breast meat. It can be concluded that the use of fish oil in diet up to 3% could improved performance parameters of native chickens.