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The current (mA) control is necessary to controlling the number of electrons and x-ray intensity at x-ray machine. Radiographers are likewise impacted by the presence of high radiation levels. This study aimed to improve performance the x-ray machine with wireless mA control system prototype. One of the important benefits of the proposed study is the simplicity to controlling intensity of x-ray based on wireless mA control system. This research method uses rheostat as current selection (mA). The current settings that can be selected are 20 mA, 30 mA, 40 mA, 50 mA and 60 mA, which can be done manually and via the mobile phone (cellphone) connected to this device via wireless using Wemos D1Mini. Tool testing is carried out by comparing the results of measuring the output voltage of the filament transformer using AVOmeter with the results of voltage calculation through formula analysis. In addition, tests are carried out for the distance of the tool control connection in the presence of obstacles and no obstacles. Based on the test results obtained, it is known that the smallest correction value is 0,01 VAC for the mA option of 30 mA. The x-ray device can be controlled wirelessly using Android up to a distance of 20 meters with a 14 cm thick wall obstructed condition. [ABSTRACT FROM AUTHOR]

This research is aimed at developing online learning materials using Google Classroom (GC) to increase teaching effectiveness and improve student achievement in biology. This research was carried out with Research and Development (R & D) design with ADDIE model consisting of four steps: Analysis, design, development, implementation, dan evaluation. First, we (researchers, teachers, and students) develop learning materials using Google Classroom. The materials, including texts, links, and videos, were reviewed by experts to get content validity. A questionnaire with Likert's Scale was used to measure the content validity. The valid learning materials were tried out in a school to know the usability of the GC. A questionnaire with Likert's Scale was used to measure the usability of the Google Classroom. Then, the Google Classroom were implemented in six classes from six high schools with a pretest-posttest control group design. Tests were administered to measure students' achievement on the learning materials. The results indicated that (1) the learning materials were valid based on the expert judgment, (2) the Google Classroom was considered easy to use according to the teachers and the students, specifically to organize the materials, to do video conference using google meet, and to do online assessment, and (3) the Google Classroom was effective to improve the students' achievement in biology. Therefore, it is concluded that the Google Classroom learning materials is feasible to perform online learning in biology. [ABSTRACT FROM AUTHOR]

Emergency learning in the midst of COVID-19 pandemic is a teaching practice that was done by teachers in the world. In Indonesia, some teachers are unprepared by the sudden change of teaching practice in class. This study aims to know the teacher's perception on the impact of emergency online learning in high school biology classes. This study is a survey, focused on 9 teachers as the respondents sampled by convenience sampling. Data collection was done through a closed questionnaire and open questionnaire. The study result showed that biology teachers have a positive perception about the emergency online learning that was done in COVID-19 pandemic. The teachers believe that emergency online learning is effective to reach cognitive objective in learning process, it also can improve teacher's knowledge about technology in education. However, there are difficulties in doing emergency online learning such as the lack of internet services, difficult in managing class, and inequality of school's resources. Online learning can be used as an alternative to teach in emergency time, but it still has problems that need to be anticipated. To solve the problem, there should be support from all education stakeholders, and the teacher also should increase their competences in teaching with technology. [ABSTRACT FROM AUTHOR]

The Semester Credit System (SCS) is a special government program for students who have varied learning abilities (fast, medium, or slow) and provides opportunities for students to graduate faster (2 years). However, so far not many schools have implemented it and there are still many schools that implement the package system, so it is necessary to examine its strengths and weaknesses that it can be implemented properly. Therefore, this study has the objectives to determine the implementation of the program of SCS. This study uses a qualitative approach with descriptive research. The results of in-depth interviews as primary objects, documents as secondary objects, SCS students and package system students are the subjects used in this study. The informants used included the principal of Senior High School 1 Bantul, the deputy head of Senior High School 1 Bantul, the biology teacher at Senior High School 1 Bantul (3 teachers), SCS students of Senior High School 1 Bantul and students of the package system of Senior High School 1 Bantul. Guidelines/interview sheets and documentation as research instruments, researchers as human instruments and in-depth interviews as data collection methods. Analysis at the time of data collection, data reduction, data presentation and verification are the analysis used in this study. Test the credibility, reliability, and conformability as a test of data validity. This research produce data on implementation of the SCS program at Senior High School 1 Bantul. At the implementation stage, the SCS has not been able to guarantee that students can graduate in less than 3 years. [ABSTRACT FROM AUTHOR]

This study aims at determining the profile of scientific literacy of senior high school student on the topic of environmental pollution. This research was a descriptive quantitative design with a survey method. The population was all students' grades X in Public Senior High School 2 Mukomuko. The sample used is 90 senior high school students' grades X of science, taken by using purposive sampling technique. The data analysis technique used a descriptive-quantitative statistics. The instrument for students consists of three aspects of scientific literacy competence with six indicators. The results showed that: (1) the three aspects of scientific literacy competence were in the low category, 50.21% explain phenomena scientifically, 43.89% evaluating and designing scientific inquiry, and 44.86% interpret evidence and data scientifically; (2) the lowest indicator of scientific literacy competence is analyzing the data from the investigation and how to relate to the findings to draw conclusions. Based on the results of research, it can be concluded that the scientific literacy of the students was relatively low. [ABSTRACT FROM AUTHOR]

The use of good learning media can increase and direct students' attention so as to lead to learning motivation. This study aims to developing an animation audiovisual media product in Excretory System material which is valid, practical, and effective at Grade XI High School. This study uses a 4D model which consists of Define, Design, Develop, and Dissemnate stages. The collecting data using of validity and practicallity instruments on theory use a validation sheet that evaluated by validator expert and teachers, practicallity test by real practice uses a questionnare sheet on google form that filled by students, also effectivity test to measure increase in critical thinking skill by test on the field uses pretest-postest control group design test. Based on gathered data the result of validity tests for the final product was 4,84 in the very valid category based on the media and material aspect evaluation. The result of practicallity test on theory by validator expert and biology teachers was 96,8% and on the real practice by students was 98,2%. The result of effectivity test shows the average N-Gain result by the experimental group was 0,445 in moderate category and by the control group was 0,087 in low category so it states that the animation audiovisual media in Excretory System is feasible to be used in learning because it has met the criteria of being valid, practice, and effective. [ABSTRACT FROM AUTHOR]

The parasitic plant (Scurrula atropurpurea (Bl.) Dans) is well-known for treating diuretic, mitotic, and cancerous conditions. It grows on trees such as those bearing tea, mangoes, and avocados. This study evaluated the activity of ethyl acetate and ethanol extracts of S. atropurpurea (growing on avocado trees) using the MTT assay on the T47D breast cancer cell line. Soxhletation was performed with ethyl acetate and re-extraction of the residue with ethanol. The ethyl acetate extract of a phytochemical analysis using the TLC method exhibited four peaks, while the ethanol extract contained six peaks. According to the findings of the study, the IC50 of the ethyl acetate and ethanol extract was 17.93 and 44.64 µg/mL, respectively. Ethyl acetate has the highest potential as a cytotoxic agent than ethanol extract. [ABSTRACT FROM AUTHOR]

Java tea (Orthosiphon aristatus (Blume) Miq.) is one of the plant's origin materials for herbal medicine commonly used as a diuretic, renal stones remedy, and to lower high blood pressure. The quality determination of the material is by measuring the sinensetin leaf content. Like other flavonoid derivatives, the sinensetin content in the leaf is affected by the age of the leaves. This study aims to measure the sinensetin content of java tea leaves based on their age level. The leaves are divided into four groups: young leaves (M), old leaves (T), a mixture of young and old leaves (C), and senescent leaves/yellow (K). The sample was prepared by ultrasonication extraction method using ethanol. Next, the sinensetin content was determined using the TLC densitometry method. The stationary phase silica gel 60 GF 256 and Chloroform: Ethyl Acetate (6:4) as mobile phase with a development distance of 8 cm and measured at a wavelength of 366 nm Fluorescent. The sinensetin contents of M, T, C, and K were 0.0104; 0.0078; 0.0105; and 0.0071%, respectively, which showed a very significant difference (P=1.24 x 10−6) in the single factor ANOVA test). Therefore, the utilization of java tea as a single ingredient or a mixture in traditional medicine is advisable not to separate the young and old leaves. [ABSTRACT FROM AUTHOR]

The Research Center for Accelerator Technology (PRTA) at the PUSPIPTEK Serpong is one of the research centers of the Research Organization for Nuclear Energy (ORTN), which belongs to the National Research and Innovation Agency (BRIN). The PRTA has a task and function to perform research, development, and innovation in the field of accelerator technology. Therefore, in order to implement the task and function of the research center, an accelerator facility will be developed as a core facility of the research center. Considering the characteristics of the electrostatic accelerator, among others are its ability to produce continuous beams and higher beam currents, and also the beam energy can be varied over a wide range of energies so the electrostatic accelerators are useful to industries, so a tandem electrostatic accelerator will be as a part of the accelerator facility. In addition, the tandem electrostatic accelerator can be used as an injector for a synchrotron, a kind of cyclic accelerator that can produce a high-energy beam of protons and heavy ions. A preliminary study has been carried out to get information related to the technical aspect of a tandem electrostatic accelerator, and the result of the study is presented in this article. [ABSTRACT FROM AUTHOR]

Stocks are the most popular instruments and the most chosen by investors because they provide an attractive level of profit for investors. In investing, investor must consider return and risk. The place where investors transact is called the capital market. The capital market must be efficient, because an efficient capital market is a market where the prices of all traded securities reflect all available information quickly and accurately. In an efficient capital market, trading in the capital market is sensitive and many parties are involved, allowing for deviations or anomalies to appear. The occurrence of anomalies in a capital market allows investors to get abnormal returns, which should not be possible if the market is efficient. Anomalies that often occur are calendar anomalies. Calendar anomalies are events that are not anticipated and can provide an opportunity for investors to obtain abnormal returns that occur at calendar intervals, such as the day effect. The purpose of this study is to analyze calendar anomalies on the Indonesian stock market to see if there are day effects, week effects and January effects using stochastic dominance method. Stochastic dominance is a technique for choosing risky investments without having to pay attention to the return distribution by comparing the cumulative probability of returns. The results of this study indicate that returns on Tuesday tend to be higher than other days, returns on 2nd and 4th week higher than prior weeks in general, and the January effect is not found in this study. [ABSTRACT FROM AUTHOR]

East Java is the province with the highest large ruminant (LR) population in Indonesia, this causes the production of CH4 and N2O is also high. This research aimed to estimate and forecast the production of CH4 and N2O from enteric fermentation (EF) and manure management (MM). Livestock population data were obtained from the Central Bureau of Statistics from 2013 to 2021. The types of livestock used in this calculation were beef cattle (BC), dairy cattle (DC), and buffalo. Greenhouse gas (GHG) emissions were calculated using the equations from the IPCC 2019. The Autoregressive Integrated Moving Average (ARIMA) model was used to forecast GHG production using R software. Data were analyzed using descriptive analysis. GHG emissions from LR come from BC, DC and buffalo by 91%, 8%, 1%, respectively. GHG emissions in 2021 from LR in the form of N2O from direct and indirect MM were 0.92 Gg Ton CO2 equivalent and 0.07 Gg Ton CO2 equivalent, respectively. CH4 emissions from MM and EF were 0.39 Gg Ton CO2 equivalent and 5.77 Gg Ton CO2 equivalent, respectively. GHG from LR has increased from 2009 to 2021. The ARIMA model (0,1,0) is the best model for forecasting GHG from BC, DC, buffalo, and total GHG produced by the large ruminant, and it is predicted that GHG will increase from 2022 to 2026. [ABSTRACT FROM AUTHOR]

Kisar sheep is one of the native sheep breeds that successfully survive and are adaptive in the ecology of Kisar Island, Southwest Maluku, Indonesia. This study aimed to explore the genetic diversity and distance of Kisar sheep from the other sheep based on the MT-ND1 gene. Thirteen samples consisted of ten samples from Kisar Island and three collected from Banten Province used in this study. DNA was collected from hair follicles and extracted using a DNA extraction kit protocol. A pair of specific primers of the MT-ND1 gene has been designed using the primer tool NCBI software that covers the whole MT-ND1 gene (956 bp). This study used 34 sequences of the MT-ND1 gene of various sheep breeds from the NCBI Genbank to build a phylogenetic tree. It was constructed by the MEGA X software version (Neighbor Joining, 1,000× bootstrap, Kimura 2 parameter models). The result showed that Kisar and Thin-tail sheep are different groups. Kisar sheep were closer to the Djallonke breed, Sahelian breed, Awassi breed, and Jialuo breed sheep. In contrast, Djallonke and Sahelian sheep were from West Africa, while Awwasi sheep were from Middle East Asia. Based on this study, we asserted that the Kisar sheep breed is a monophyletic group. [ABSTRACT FROM AUTHOR]

Abiu fruit has many health benefits including antimicrobial and anti-cancer. The shriveling symptom in abiu fruit is one of the problems that can reduce fruit quality during storage and decrease consumer preference. However, abiu fruit indicates shriveling symptoms easily during storage. Therefore, the study aimed to evaluate the changes in shriveling symptoms at two stages of maturity of abiu fruit during the storage period. Abiu fruit was harvested at the half-ripe (HR) and the fully-ripe stages. They were stored at ambient temperatures (28±1°C) for 12 days. The shriveling symptoms, weight loss, firmness, and edible part portion parameters were observed during the study. In further, shriveling incidence (SI) was calculated. Shriveling in abiu fruit harvested half-ripe appeared on day 6 of the storage period. The result suggested that the shriveling symptoms are not a problem in postharvest abiu fruit harvested fully ripe, but it is not so in abiu fruit harvested half-ripe. The shriveling symptoms in abiu fruit harvested at the half-ripe stage occurred when the weight loss was ≥6% and the firmness was ≤11 N. [ABSTRACT FROM AUTHOR]

This research is motivated by the use of learning media which is one of the facilities and infrastructure to support school activities. With the use of appropriate learning media will be able to have an impact on children's learning outcomes. This research aims to determine the effectiveness of using Quizizz learning media in strengthening the numerical abilities of children aged 4-5 years. This type of research is quantitative research with the True Experimental method by conducting pre-test and post-test to measure the acquisition of the treatment (treatment) on the object of research. The samples taken in this study were children aged 4-5 years in TK A2 class in TK IA as many as 18 children. Retrieval of research data using validity tests and online questions. The data analysis technique used is the validity test for media and Quizizz materials and comparative statistics for online questions. The results of the validity test for media and materials in Quizizz show that Quizizz is valid and can be used as a learning medium in kindergarten. The result of comparative statistics is to test the hypothesis that there is a difference between two (or more) variables being studied in the implementation of online questions during the pre-test and post-test. The hypothesis states that there is a strengthening of the numerical ability of the research object after the use of Quizizz learning media. This can be seen from the results of the t test where t count > t table at a significant level of 5% (of 15.52). [ABSTRACT FROM AUTHOR]

This study aims to determine students' critical thinking skills on viruses and bacteria in high school, Muara Enim sub-district. This is a descriptive study with a survey method. The sample was determined using a cluster sampling technique followed by a stratified random sampling technique to determine the number of samples for each school. This research was conducted at four high schools in Muara Enim District. The results showed that critical thinking skills were mostly categorized as very low. This can be seen from the percentage values: the high category of 2.46% of students, medium category of 4.93% of students, the low category of 27.59 students, and the very low 65.02% of students. The highest critical thinking skill indicator is assumption of 51.48%, while the lowest is in Interpretation and concluding with a percentage of 24.96%. Based on the results of the analysis of the lesson plans that the teacher has prepared, discussion and discovery learning methods are commonly used. Still, during the pandemic, the planned method could not be implemented properly. Only limited to lectures and questions and answers method; this is due to the limitations of online learning [ABSTRACT FROM AUTHOR]

A high voltage (kV) on the x-ray device is necessary to create x-ray radiation. High voltage (kV) is created by the High Tension Transformator (HTT), which increases the Alternating Current (AC) voltage from the Volt (V) scale to Kilo Volt (kV). However, many regional public hospitals in Indonesia continue to employ X-ray equipment with analog kV selection systems. As a result, radiographers will be continuously exposed to radiation since they must directly operate the instrument. This project aims to develop a wireless kV controller prototype for x-ray equipment to decrease radiographers' radiation exposure. This study methodology comprises four major phases: hardware design, software design, voltage suitability testing on x-ray instruments, and wireless remote-control testing. This study uses Android smartphones to set the kV parameter. The WEMOS D1 MINI and the Arduino MEGA 2560 microcontroller are used for serial connection. The selectable kV options are 40kV, 50kV, 60kV, and 70kV, whose outputs are emulated with 300V, 350V, 400V, and 450V. The largest adjustment is +9.263V at the 60kV level, while the smallest is +2.316V at the 40kV setting. The adjustment value is still within the 5 percent tolerance value limit. With a barrier wall thickness of 14 centimetres, the farthest distance measured was 20 meters. [ABSTRACT FROM AUTHOR]

Maternal and child health are part of the Sustainable Development Goals (SDGs). Globally, the world is pushing to reduce maternal mortality to below 70 per 100,000 live births and to reduce infant and under-five years old children mortality rate to 12 per 1000 live births by 2030. However, maternal and child mortality rates in Indonesia remain quite high. Indonesia National Survey data show maternal mortality rate in Indonesia is still quite high at 305 per 100,000 population and the child mortality rate is 24 per 1,000 live births. In order to reduce maternal and child mortality rate, Indonesian government implements various policy interventions including by pushing local governments to create policy innovation in maternal and child health. SANPIISAN (Love and Care for Mothers and Children) is an initiative from Health Office of Kota Semarang to create an integrated system to carry out preventive measures to reduce maternal and child mortality rate in Kota Semarang. Given the success of SANPIISAN, this paper examines the mechanisms that sustain the innovation. In order to answer the question, the paper utilizes diffusion of innovation theory to analyse the diffusion and momentum processes of ideas within a specific social system. Methodology of the research is qualitative research and data are derived from interviews with main policy actors in SANPIISAN program (N=10). We argue that the success of SANPIISAN is supported by strong network among innovation adopters. The research contributes to the growing discussion in local policy innovation to support the achievement of SDGs. We conclude that SANPIISAN has proven to be one of the strategic and effective efforts that has significant leverage for the prevention of maternal and child mortality rates in Kota Semarang. Moreover, the program has been acknowledged as one of good practices in local government initiatives to reduce maternal and child mortality rates. [ABSTRACT FROM AUTHOR]

The need for sustainable energy has made it important to study several alternative renewable energy sources. It has also been discovered that the current pandemic conditions have caused more hospital visits, thereby, leading to the production of more liquid wastes. One of the methods usually used to treat this hospital wastewater is electrocoagulation which removes dissolved pollutants and also produces hydrogen as part of its products. Therefore, this study was conducted to determine the opportunity of using the hydrogen produced from the electrocoagulation process of hospital wastewater as an alternative source of renewable energy. The observations were made on a laboratory scale using ciprofloxacin antibiotic and methylene blue solution as samples of the waste. The results showed the best product is the hydrogen gas accumulated when using aluminum electrodes in the electrocoagulation process of antibiotic and methylene blue solutions for 4 hours with a solution pH of 10. A total of 97.85.10−3 mmol hydrogen gas or 0.2% by volume of the waste solution was produced from processing 1 liter of waste solution. Further research is, however, recommended on the utilization of wastewater treatment through the electrocoagulation process as a source of hydrogen. [ABSTRACT FROM AUTHOR]

The purpose of the study was to determine the effect of the problem based learning model (pbl) and cooperative two stay two stray (TSTS) on students' critical thinking skills in elementary school mathematics learning. This type of research is quantitative, using experimental research methods with a population of fifth grade elementary school students in the Nusa Indah cluster. The research samples were taken from 3 elementary schools using random sampling technique. The design used a pretest – posttest. The sample consists of 35 students at SDN Ngawen (experimental class 1), SDN Ruwit 31 students (experimental class 2) and SDN Buko 28 students in the control class. Data collection using tests, hypothesis testing using t test, and F count 0.672 greater than F table 0.5138. Homogeneity and normality test, With experimental results 1, the average value of pre-test normality test results Lcount = 0.197 and experiment 2 obtained L = 0.138, then the data for the two experimental classes is normally distributed. Homogeneity test obtained an average of 0.55> 0.05, meaning that the class variance is the same or homogeneous. In the post-test experimental model 1, students achieved an average of 80.00, learning completeness 87.59% and observation results 87.50. Experimental model 2, class average 82.59, learning completeness 85.59% and observation results 88.9. The results showed that was an effect of treatment of problem based learning models and cooperative two stay two stray on students' critical thinking skills because they met the criteria for the value obtained the KKM 70, so the hypothesis was accepted. There are differences due to the effect of the PBL and cooperative TSTS models on students' critical thinking skills, The results of learning mastery of the PBL model are higher than the cooperative TSTS. For this reason, the teacher-centered learning process should be changed to student-centered. [ABSTRACT FROM AUTHOR]

This research aims to analyze (1) the effect of inquiry-based blended learning and offline learning model on observation report making skills, (2) the effect of learning interest on observation report making skills, and (3) the interaction between learning models and learning interest on observation report making skills. This research design is quasi-experiment with 2x2 factorial design. This research was conducted in 4 public elementary school in Andong, Boyolali, Indonesia. The sample consisted of 90 students selected using cluster random sampling technique. The instruments used in this research are performance appraisal tests and learning interest questionnaires. Prerequisite tests were conducted, namely normality test, homogeneity test, and balance test. Hypothesis testing was tested using a two-way ANOVA test. It was found that there was a significant effect on the hypothesis and post-hoc test with a comparison of the average observation report making skills and interest in learning between the experimental and control classes. It was concluded that: (1) the learning model had an effect; (2) influential learning interest; and (3) there is no interaction between the learning model, and interest in learning, on the observation report making skills. [ABSTRACT FROM AUTHOR]

Based on the 2018 PISA results, Indonesia's average math score reached 379 with an OECD average score of 487. Students in Indonesia scored lower than the OECD average in reading, math, and science. Blended learning becomes a recommendation in an effort to improve learning. One of the blended learning media is a web-based learning media developed using Google Sites. The method used in this research is the Research and Development method. The data collection instruments used were observation, interview, and questionnaire. Questionnaires were employed to obtain media validity assessment data from material experts and media experts as well as obtain eligibility assessment data from teachers as practitioners of mathematics learning and students as targets of media use. The average score for the Linier Program of second-grade students at Madrasah Aliyah Negeri Wonogiri for the academic year 2021/2022 has not shown a significant increase in grades. Therefore, learning mathematics, especially linier programming, requires the appropriate media to explain the concept of linier programming clearly. Researchers create interactive learning media based on Google Sites. The media are entitled Prolin Sites which stands for Linier Program in Google Sites and has been tested on a small scale on 7 students of second grade and tested on a larger scale as many as 21 students of Madrasah Aliyah Negeri Wonogiri. The purpose of this research is to determine the validity and feasibility of using Google Sites-based interactive mathematics learning media on linier program material for second-grade class. Learning media Prolin Sites are valid and feasible to be used in learning activities. The media can inspire teachers and other researchers to innovate in developing learning media based on Google Sites. [ABSTRACT FROM AUTHOR]

This experimental research was carried out to determine the ability of Al-doped lithium titanate (Li4Ti5O12, LTO) to function as an anode material synthesized by the facile sol-gel using lithium acetate (C2H3O2Li), titanium butoxide (C16H36O4Ti), and aluminum acetate (C4H7AlO5). All raw materials with Al contents of 1, 2, and 3 wt% were stoichiometrically dissolved in ethanol solutions using hydrochloric acid as a catalyst. After aging for 72 h, the precursors were sintered at 900°C for 2 h in air atmosphere. Furthermore, the effect of Al-doped on the crystal structure of LTO was studied using X-ray diffraction, while the morphology, size, and element of the sample were measured using scanning electron microscope (SEM). The cyclic voltammetry and capacity of the samples were investigated using the galvanostatic techniques in a half cell. The result of phase analysis showed the presence of LTO and rutile structures as impurities. In addition, the SEM images showed that the particle was in irregular form without porous observations. The average particle size of 6 mm was measured using image-J software, while the increase in dopant on the LTO structure led to the enhancement of the diffusion coefficient of Li-ion. Based on these characteristics, the spinel LTO provided an initial capacity of more than 100 mAhg−1 after charge-discharge at the rate of 0.1 C in range potential 0 – 3 V. [ABSTRACT FROM AUTHOR]

A fuel cell is well known as clean energy that can be categorized as a renewable energy source. Proton Exchange Membrane Fuel Cell (PEMFC) is one kind of fuel cell, which works in low temperatures using a simple structure. Regarding this advantage, PEMFC can be a chance for introducing fuel cell process to students in vocational high school with renewable energy majors. Reaching the goal requires a learning media that can show the structure and process using interactive educational kits. The educational kits are built as trainers, which could be more effective when integrated with smartphone applications. The application can work with multi-platform interactive media, such as augmented reality. Then, the educational kits named Robo-PEM were developed to introduce PEMFC implementation by using Science, Technology, Engineering, and Mathematics (STEM) model. The Robo-PEM consists of a trainer, job sheets, and material course, which are combined in the Robo-PEM application. The Robo-PEM educational kits were evaluated by learning media experts. The result shows that the Robo-PEM educational kits were valid and could be implemented for learning media in vocational high school. [ABSTRACT FROM AUTHOR]

Abiu is a tropical Amazonian plant that has been growing in Indonesia for several years. The purpose of this research is to characterize the fruit of abiu from two places in Bogor Regency: Balumbang Jaya and Mekarsari villages. The study was conducted between February and August 2018. Fruit quality analysis was performed at post-harvest laboratory, Department of Agronomy and Horticulture, IPB. Each area received a random sampling of up to 15 plants. The result indicated that the ellipsoid dominates the fruit form percentages in both sites. Fruit diameter and weight are substantially greater in Balumbang Jaya than in Mekarsari. The TSS concentration, acid content, and shelf life are all comparable in both sites. Environmental factors, particularly rainfall and temperature, can influence the appearance of several fruit characters. [ABSTRACT FROM AUTHOR]

This research aims to examine the values of environmental sterilization in the artwork of Yogyakarta-style banner mask creations. Analysis and intrepetation focused on batik masks of peacock and rose motifs. The research was conducted in Bobung, Putat Village, Patuk Subdistrict, Gunungkidul Regency, Yogyakarta. The study uses a qualitative descriptive approach with a single case strategy. Data is sourced from informants, places & events and documents/archives collected with in-depth interview techniques, participatory observations, and content analysis. The validity of the data is tested with source triangulation techniques and informant reviews. Data analysis is done with an interactive analysis model with data reduction procedures, data displays, and verification. The results of this study showed that the kraeasi banner mask Peacock and Rose contains environmental conservation values. The peacock on the banner mask is a representation of the male crown symbol that represents male masculinity or virility. The rose on the mask of the goddess sekartaji becomes a symbol of the crown of women who are a condition of the beauty that represents feminism. Environmental conservation values are contained in the background of peacock selection aimed at preserving green peacocks (Pavo muticus) which are endemic to endangered Java. While the Rose (Rosa sp) was chosen because of its value of philosophical value and beauty that deserves to be preserved. [ABSTRACT FROM AUTHOR]

Transdermal drug delivery system preparations are designed for application to the skin or to specific mucosal surfaces for local action or topically applied penetration of medication, as well as for emollient or protective action. In this study, we established and characterized polymer-based hydrogels in order to investigate their effectivity as topical drug delivery systems of Annona muricata extract enrich with zinc to confirm the possibility of inherent ulcus diabeticus properties in these hydrogels. We report here the use of four different Carbomer-940 based formulations concentrations 0.5%; 1.0%; 2.0%; and 3.0%. It was evaluated for physical parameters, pH, viscosity, and Spreadibility. Out of the four formulations the 2.0% was found to be better in all aspects. The characterize of nano-hydrogel base also was tested by using particle size analyzer. As a result, it can be used as a formulation for further application. [ABSTRACT FROM AUTHOR]

Knowledge management system (KMS) is a method that can help companies manage knowledge assets within the company. A KMS in addition to being able to manage knowledge assets is also expected to be safe from unauthorized parties, easily accessible when needed and become a place for sharing knowledge for employees in the company. In its application, the documentation of knowledge which is the result of employee training at PT X still uses paper. So, when the company wants to implement knowledge sharing, it will be hampered because it is difficult to distribute paper documents to all employees. Based on this, the authors designed a website-based KMS. The KMS design in the modeling uses UML and the implementation uses the php and MySQL programming languages with the help of the Laravel framework and the SAW algorithm. This KMS is equipped with features that make it easier for the Company to implement knowledge sharing. The results of this KMS design, produce a system that has been tested using black box testing resulting in a 100% tested success percentage and user acceptance test testing that is tested on four assessment criteria with an average user satisfaction percentage of 82% and includes good criteria. [ABSTRACT FROM AUTHOR]

The Li-NMC cathode battery production usually applies carbonate precipitation processes. Manganese compound used is in the form of manganese sulfate (MnSO4) and precipitate using carbonate to produce manganese carbonate. This research has studied the synthesis of manganese carbonate from Indonesian manganese ore as raw material for the manufacture of NMC cathode precursor. Some manganese ores are leached using oxalic acid as a reducing agent in a sulfuric acid atmosphere. This leaching process was conducted using sulfuric acid with a concentration of 6%, leaching temperature 80oC, for 6 hours, oxalic acid used 30 g/liter, with a ratio of ore to the sulfuric acid solution was 52.63 gr/l. Then, the impurities (mainly iron) precipitation from pregnant leached solution was carried out with pH adjustment using various alkalis. The alkalis used in this study were NaOH, Na2CO3, and NH4OH. Manganese carbonate products were characterized using XRF and XRD. The results showed that manganese carbonate with high purity (>95%) can be synthesized from Indonesian manganese ore using leaching and precipitation method. [ABSTRACT FROM AUTHOR]

NMC is a lithium-ion battery that combines three primary metals, namely Nickel, Manganese, and Cobalt. Manganese metal is used in the form of manganese sulfate (MnSO4). This research has studied the effect of adding alkali in the precipitation of impurities from the solution of manganese ore leaching on the crystals of MnSO4 as raw material for the manufacture of NMC. Some manganese ores are leached using oxalic acid as a reducing agent in a sulfuric acid atmosphere. Then, the impurities (mainly iron) precipitation from pregnant leached solution was carried out with pH adjustment using various alkalis. The alkalis used in this study were NaOH, NH4OH, and Ca(OH)2. The MnSO4 products were characterized using XRF and XRD. The results showed that the use of Ca(OH)2 in the precipitation of iron and other impurities from the pregnant leached solution could provide better MnSO4 crystals than the use of NaOH and NH4OH. [ABSTRACT FROM AUTHOR]

Welding results must be distorted as little as possible, because distortion can reduce weld dimensions accuracy, lengthen the repair process, and raise production costs. The purpose of this research is to investigate the effects of the dual heat method on distortion and mechanical properties. The heat sink uses hollow stainless steel rods filled with running water at a temperature of ±27°C which is applied simultaneously with the welding process. The single heat sink is characterized by the heat sink being above the workpiece, while the dual heat sink is characterized by the heat sink above and below the workpiece. The results showed that the treatment of single heat sink and dual heat sink reduced the distortion level significantly by 58% and 66%, respectively. Tensile test results show a tendency for the same value between as welded, single heat sink and dual heat sink, which is around 480 N/mm2 (480 Mpa), meaning that the heat sink does not reduce the tensile strength of the weld metal and HAZ. The results of the as-welded and dual heat sink bending tests also showed that the bending test passed the AWS criteria. Impact test results show a decrease in the toughness of the weld metal due to heat sink treatment. [ABSTRACT FROM AUTHOR]

Today's learning is increasingly innovating in terms of learning and learning tools. teachers are required to make learning that is able to increase student interest in learning, one of the media is a website. The website is able to accommodate a lot of material and is arranged in a coherent manner. This research aims to (1) Produce website-based learning media development products, (2) Know the feasibility of website-based learning media (3) Empower students' learning motivation by using website-based learning media.This research was included in the type of research and development (R&D). The model used was ADDIE which was conducted at SMA Negeri 5 Surakarta. The subject of the research was students and biology teachers. The product validation was carried out by two learning media experts and one material expert. The instruments used in this research were: needs analysis instrument, student and teacher response questionnaire, and learning motivation questionnaire. Data retrieval techniques were carried out by distributing the questionnaires for students' and teachers' responses after learning. The learning motivation questionnaire was distributed before and after learning using my website. Data were analyzed using quantitative and qualitative techniques.The result of this study was a learning website containing virus material that can be operated either on a smartphone or PC. Media websites have been validated material expert with a score of 78.75 (feasible) and media expert with an average score of 84.03 (very feasible). There was input from the validator to revise the student's trial. The limited scale trial results of the website with a total of 15 students resulted in an average score of 93.61% (very feasible), and the larger trial scale with a total of 36 students (grade X MIPA 1) resulted in a score of 89.43% (very feasible). The teachers' responses to website media were 98.44% (very feasible) and 89.06% (very feasible). Student's learning motivation increased by 5.41% after using the website media. The test results showed a sig score of 0.002< 0.05, which means that there is a significant difference between the initial and final motivation indicate there is virus web learning can be empowered students' motivation. [ABSTRACT FROM AUTHOR]