Development of Android-Based Mobile Learning (M-Learning) on Voltaic Cell Sub Materials to Increase Learning Effectiveness in Pandemic Covid-19 Era

This study was conducted to know the worthiness of learning media mobile learning (M-Learning) is increasing students' learning effectiveness. Research and Development (R&D) has adapted the method used. The research was conducted involving 26 students and three validators. The validator consists of 1 lecturer as a media expert lecturer, one material expert, and one chemistry teacher. Based on the study results, the results obtained media validity of 93%, and the effectiveness of the media in terms of increasing student scores as much as 41.9%. So that the android-based M-Learning product developed can be said to be feasible and can be implemented in chemistry learning on voltaic cell sub materials.

SCARING INTEREST IN LEARNING CHEMISTRY BASED ON CAREER INTEREST THROUGH ECOLECTROCHEMISTRY: PRESENTING INCLUSIVE CHEMISTRY IN ONLINE CLASS

The online learning of organic chemistry series chemistry in class XII MIPA Catholic SMA Santu Petrus Pontianak in the first three months of the odd semester showed a decrease in interest in learning chemistry. This study was conducted to find chemistry lessons that match the career interests of students, especially the study topics in the physical chemistry learning series (voltaic cells and electrolytic cells). On the topic of voltaic cells, group projects are carried out by choosing their own types of assignments according to the interests and learning styles of students with activities of making chemical songs, simple practicum, limited webinars and advertisements for voltaic cell products. On the topic of electrolysis cells, a group project was carried out with the concept of combining economics/business into electrochemistry, called ecolectrochemistry. The voltaic cell project assessment uses five parameters: the accuracy of the voltaic cell concept, the relevance of the voltaic cell concept to the concept raised, creativity, fulfillment of task requirements, and collaboration. The ecolectrochemistry project assesses problem-solving skills using the IDEALS model, presentation assessment and assessment of creative and disciplined attitudes. The active and enthusiastic involvement of students is better than in the organic chemistry series. There is an increase in interest in learning chemistry from 27.38% to 65.48% and there is an increase in the average learning outcomes of the physical chemistry learning series compared to the organic chemistry learning series. These results indicate that learning designed according to students'.

Analysis of Electrical Energy Contained in Vegetables

This study aims to determine the source of electrical energy in potatoes and lime. The method used is based on the principle that the salt content in potatoes is a solution, where salt is the solute and water is the solvent, so the ions can move freely. The movement of the ions in the potato can conduct electricity. For the contained acid lime affects the hardness of the composite, which affects the matrix and filler bonds. oxalic acid, which is in lime juice, is a type of electrolyte solution. In a voltaic cell, the electrolyte solution can function to deliver ions from the anode to the cathode so that it can produce electrical energy. Electrical energy is energy that is very important in life. Electrical energy is a basic human need so that potatoes and lime can be used as an alternative source of electrical energy.

Voltage control of AC hybrid microgrid

The decline of competence effectuated by the unreplenishable energy etymology due to the plummet of fossil fuels has created an alternate need for renewable energy sources to play a vital role in providing power at a larger scale. Thus, a new system of distribution of energy resources is introduced to tackle the ever-growing demand for power and safety of the environment using renewable energy sources with the traditional ways of transmitting power. Such challenges can be overcome by using hybrid microgrids which helps in detecting and hegemonizing faults more dexterously sanctioning sharing of load and instinctive switching through various algorithms thus improving the system accuracy and adaptability. This exertion incorporates the modeling of an AC hybrid microgrid system analyzed in the is-landed mode. Fuel stack and the photo-voltaic cell are used as renewable energy power sources. It also includes the PID control method to the solution the most encountered problems in a microgrid. The engaged control modus operandi can modulate and regulate the output voltage at an expected and paradigm value. The whole AC hybrid microgrid and its control are simulated in MATLAB/simulink R2020b.

Designing Chemistry Learning Media to Train Ecopreneurship

The purpose of this research is to get the draft chemistry learning media design developed to support ecopreneurship. Ecopreneurship at FMIPA UNESA is broken down into eco-innovation (new ideas), eco opportunities, and eco commitment. Design of this research is giving the assignment to research objectives. The model development research with stages, SMK learning in class, students doing assignments, arrange learning media design, assessing game design, and data analysis. The assignment is compiling a plan for developing instructional media that can be applied in chemistry learning in SMK. That assignment was assessed by 3 experts and the score was averaged. The assessment has been fulfilled if all media plans have met the fulfillment criteria. The innovation of chemistry media was also assessed and has met the innovation when obtaining an average of at least 4 with a maximum scale of 5. This research was conducted at the Department of Chemistry FMIPA UNESA in the odd semester of the academic year 2019/2020. the results showed 4 vocational chemistry learning media designs, (1) VCO-Making KIT, (2) Voltaic Cell KIT, (3) Acid-base Mini Lab, and (4) Red and Ox Games. All of that has fulfilled the contents and construct besides that the student has a new idea.

Photo Voltaic Powered Hover Board

In this technical world peoples are always seeking forsophistication which demands for innovative solution which could possibly alter their lifestyle that would cozy them at itsbest. Such an innovative product is the self-balancing scooter which is called as Segway rider in the technical world and ashover board in common, whose purpose is to transportindividually in a relaxed manner without letting them to strain their locomotive organs. The proposed system emphasizes theuse of renewable energy to recharge the battery, PV panel are employed along with perturbation and observation MPPT forcharging. The integration of photo voltaic cell with the hoverboard proves to be effective in both indoor and outdoor applications. The photonic energy of indoor artificial light sources are harvested by the PV modules, at the same time in outdoor it can be employed during day time where it cancapitalize the solar energy, perturbation and observation MPPTgives a simple solution for maximizing the performance in charging the hover board, in addition added features such as itcan charge automatically, it doesn’t demand a manual labour fordriving it or charging it periodically makes proposed system tofind its application in various situation when the person as adifficulty to walk or for the ones who are exhausted walking forlonger hours. Besides it also helpful for physically challengedand aged persons. Under testing the proposed system has ablecarry up to 100 kg of load in a smooth manner at a speed of 3km/hr. The proposed system will be fruitful for indoor application such as Super markets for carrying goods, Shopping Malls, Railway Stations, Airports, Large Industrial Plant and outdoor application such as Sub Station, Monumental places,Tourist Spots etc.

Pengembangan Digital Flipbook untuk Menfasilitasi Kebutuhan Belajar Multiple Representation pada Materi Sel Volta

The voltaic cell teaching materials used in high school are still in the form of textbooks that do not present multiple representations of chemistry, namely the macroscopic, submicroscopic, and symbolic levels. The three levels of chemical representation can be visualized using flipbook teaching materials so that students are expected to understand the voltaic cell material. Teaching materials are used to support the learning process. Current learning still uses conventional learning models that only focus on teachers. Constructivist-based active learning is needed because it involves students so that learning is more meaningful. One of the constructivist learning models is the guided inquiry learning model which includes observing, asking questions, compiling hypotheses, gathering information, testing hypotheses, and concluding. The purpose.of this development.is to.produce a proper guided inquiry-based flipbook teaching material. The flipbook teaching.materials were developed.using the Four-D model (define, .design, .develop,and.disseminate) but the disseminated stage was not carried out. Media and material validation was carried out by five chemistry lecturers. The legibility test was carried out by 50 high school alumni with a specialization in Science. The assessment uses a Likert scale accompanied by comments, suggestions from the validator, and audience. The data obtained from the analysis questionnaire to determine the feasibility level of the product using the percentage technique. The validation of the flipbook teaching materials development product in terms of material obtained an average score of 85.4%, validation in terms of media.obtained.an.average percentage of 85.5%, while the readability test results obtained.an.average.percentage of 87%. Based on the results.of material validation, media, and legibility tests, it can be concluded that the flipbook teaching materials guided inquiry-based voltaic cells are very suitable as a learning resource.