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Vaccine distribution to regions in Indonesia is very important and needs to be considered because vaccines have different resistance to temperature and safety in storage. Vaccine spoilage can occur if it is not stored under proper storage conditions. In storing vaccines, they usually use portable cooler boxes so that vaccines can be distributed to remote areas. The latest breakthrough was made. A cooler box using Peltier or thermoelectric elements was chosen as an alternative because it is simple and economical. This study aims to analyze the characteristics of the Peltier TECT1-12706 thermoelectric combined method on the cooling temperature in the cooler box. This study uses experimental methods on several variations of parallel, stacked, and pyramid combination installation methods with different thermoelectric quantities. The data analysis technique was carried out by making a diagram of the relationship between time and temperature received by the thermocouple during testing in the cooler box. From the experimental results, it was found that the best method of combining Peltier installations is to use 3 Peltiers with the 1-2 pyramid combination method where the temperature decrease in the cold sink is faster than the decrease in temperature in the cooler box when the coolbox is first operated with an average temperature of the lowest average is around 0.6°C. Suppose the cold sink can cool faster than the temperature in the cooler box. In that case, the cooling process in the box can be even faster, and the estimated waiting time before placing the vaccine can be faster to reach the lowest temperature. Therefore, the arrangement of 3 thermoelectrics with the pyramid method of 1-2 can be used to store certain vaccines to be brought to remote areas in Indonesia.

Measurement of the sky’s brightness at night is needed in observatories of celestial bodies. This research utilizes tourism in Tulungagung Regency to increase tourist attraction to the beauty of celestial objects such as stars, moon, etc. In addition, it provides information to astronomical tourism whether or not the place is suitable for research. This study measures the sky’s brightness at a certain time based on the region and position of the moon. The method used is observation using Sky Quality Meter. The places used are the Senggani Jurang Campground, Tulungagung Regency. This study was conducted for 16 days using SQM-L and SQM-LU which were performed every 10 minutes. The data obtained from the observations will then be analyzed using correlation between time and the value of sky brightness with MPSAS (Magnitude Per Square ArcSecond) units. This research results show that the best sky brightness value is 22.79 MPSAS. It shows that on average throughout the night light pollution is very little. From the results of the observation data that has been done, it can be said that the Senggani Jurang Campground, Tulungagung Regency has the potential to become astronomical tourism.

Most of MSMEs are engaged in food processing, one of them is the production of shrimp crackers. The production of shrimp crackers requires heat energy for drying process which majority of MSMEs still use the conventional method by drying the crackers in an open space under sunlight directly. Conventional method is very dependent on the weather and affects the unhygienic of the products. This research aims to develop a solar hybrid dryer as an alternative dryer to dry shrimp crackers without depending on the weather. This research uses experimental methods with quantitative data analysis techniques to observe the relationship between time and water content of shrimp crackers that are dried using a solar hybrid dryer. Based on the data analysis, the results for the first until the third experiments show the correlation between time and water content of shrimp crackers that are dried using this machine is shown to be a logarithmic graph. The first equation Y1 = -26.18 Ln (X1) + 41.028, R1 = 0.85 for drying crackers weight 1000 grams, and the 2nd equation Y2 = -31.81 Ln (x) + 46.927, R2 = 0.93 for drying crackers weight 3000 grams, and the 3rd equation Y3 = -26.88 Ln (X3) + 41.707, R3 = 0.81 for drying crackers weight 5000 grams. Therefore it can be concluded the more mass of the shrimp crackers that are dried, the more water content evaporates. In about 2 days of drying, the water content in the shrimp crackers has reached according to Indonesian National Standard which is around 12%. The hybrid dryer has a capacity of up to 5000 grams with an average drying temperature is 37.5°C.

Construction of high-rise buildings is currently flourishing implemented that serves as an office, hall, hotel, or home. High-rise buildings in general minimize the use of construction materials that has a heavy weight to reduce the building load and achieving efficiency. One of construction parts that can be minimized weight is a wall construction. The materials of partition wall which produced are glass, gypsum, concrete and wood. This research uses of wood fiber materials from oil palm trunks which have reached the age of replanting. It is constituted by the growing oil palm plantations and palm oil mills in Indonesia so that it will also increase waste produced. This research uses experimental methods to determine the mixture of adhesive and oil palm trunk fiber (OPTF) in order to reach the standards of strength by find out the physical and mechanical properties of the partition. The result shows that using ratio 70:30 of adhesive and OPTF reach the standard partition wall that serves as partition board and decorative panel.

The RSG-GAS reactor is designed to operate at a power level of 30MW, as stated in the Safety Analysis Report, and currently RSG GAS has been operating for 34 years. Aging of components has been anticipated to ensure the reactor operates safely. Some parts of the structure, system and components (SSC) will experience degradation/aging and must be replaced. Cooling tower is one of them, where the sub components are maintained and tested regularly. Cooling tower aging indication are known from the decreased performance of the reactor cooling system. For this reason, it is necessary to evaluate, both in terms of measurement and calculation analysis, before and after the refurbishment. The efficiency of the cooling tower has been calculated based on the measurement results of the cooling temperature, at the RSG-GAS operation at a power level of 30 MW. From the measurement results, it can be seen that there is a difference in air velocity inlet and outlet of module 1 and module 2. As well as the working temperature of the blower is uneven, the blower temperature ranges from 60.5°C-91.9°C. So that the operation of the RSG GAS could not last long. The efficiency of the cooling tower during the day ranges from 54.72% to 73.23%. The effect of decreasing cooling tower capability can be seen from the calculation results on the performance of each module individually. while its effect on the overall performance is known from the increase in the temperature of the coolant entering the reactor from the HE. The results of the cooling temperature measurement, after refurbishment, show that the cooling tower performance has been able to dissipate heat according to the initial design.

The applications and facilities of ICT in a university are necessary to enhance the performance, and quality of the education. As the main role of the successful use of ICT facilities, students are expecting to obtain the gratification and satisfaction in using these technologies. The study employed the UGT (Uses and Gratification Theory) as the fundamental concept to arrange the research framework and conducted a survey among 386 respondents. The result pointed out that students’ attitude, social support, and locus of control are influencing the gratification and satisfaction with the usage as the intervening variable. Findings also stated that the usage of ICT applications and facilities is influencing both the gratification and satisfaction. However, variables of demographic, community involvement and credibility have no effect on the gratification and satisfaction.

Preface The fifth Seminar Nasional Matematika dan Pendidikan Matematika (SENATIK) was held by Mathematics Education Study Program, Universitas PGRI Semarang, Indonesia, in 2020. This seminar has objectives to improve mathematics teaching, to solve the mathematics problem, and to expand mathematics contribution to society. Freedom learning is a new policy of the Ministry of Education and Culture of the Republic of Indonesia to improve the national education system that seems monotonous. Through freedom learning, it is expected that it can create happiness and a joyful learning atmosphere for both students and teachers. Learning activities will be effective if the learning atmosphere is enjoyable. By having a joyful learning environment and adequate learning facilities, students are expected to be able to construct knowledge and support in generating motivation to learn actively. Also, by giving freedom in carrying out learning through their learning will train and instill a democratic attitude for students and also shape students’ creativity to explore their potential. As technology develops, teachers are expected to use technology for joyful learning. Through the integration of technology in the freedom of learning, it is expected that effective and efficient learning will be created. Therefore, teachers are required to be able to do innovative learning. In view of that, the Mathematics Education Study Program of Universitas PGRI Semarang invites researchers, practitioners, and educators to participate in and contribute to the fifth SENATIK 2020 under the theme “Freedom of Learning: Integration Technology in Mathematics Learning.” The keynote presentations are provided to show the contribution of mathematics educators in mathematics education towards research and knowledge sharing. We have three keynote speakers, that’s are Prof. Dr. Ratu Ilma Indra Putri, M.Si. (Universitas Sriwijaya, Indonesia). Dr. Irwan Endrayanto Aluiciues, S.Si., M.Sc. (Universitas Gajah Mada, Indonesia), and Dr. Achmad Buchori, M.Pd. (Universitas PGRI Semarang, Indonesia). We also have two speakers in the workshop session that are Dr. Rully Charitas Indra Prahmana (Universitas Ahmad Dahlan, Indonesia) and Dr. Muhtarom (Universitas PGRI Semarang). On this seminar implementation, from one hundred and thirty-one full paper registers, there are sixty-nine presenters declared to be qualified. Our wish all the participants would enjoy the seminar, so they involve valuable and rewarding, and improve the knowledge and experiences. Publishing Team

Smart Big Data App Using Deep Artificial Intelligence (AI) Core Engine System focuses on solving problems related to the difficulty in building a prototyping model computer simulation like in silico as a model initiation of the complex Covid-19 medicinal compound involving Big Data ecosystems such as Hadoop and Spark. The difficulty is for example, currently, it is still very arduous to measure the rate of mixture of a compound when combined with many other compounds, which can consider the trade-off in minimizing the negative effects but optimizing the positive effects. In addition, the computation time becomes very long when using a system that is not in the Big Data ecosystem since this is proportional to the large number of compounds that vary widely and also the number of different situations of Covid-19 patients with other congenital diseases (comorbid) or without congenital disease; thus, it can be considered to be included in a condition that requires a very complex computational process which is very difficult to model using a conventional mathematical approach because the calculations are certainly very complex when compared to approaches using meta-heuristics algorithms such as Particle Swarm Optimization (PSO) which is much easier but requires a very large particle population space and iterative process to achieve global convergence. As a consequence, it requires fast computation processes based on distributed computing such as using the Big Data ecosystem. From the review of these problems, the system was created based on the Computational Intelligence; hence, the end-users, especially the developers, can build an application easier in spite of the complex computations, one of the which is in the meta-heuristic technique to minimize the negative effects and optimize the positive effects of the medicinal compounds by including a lot of data to get a better modeling. Therefore, the prototyping modeling project can be quick and robust, and achieve high performance measurements.

Since COVID-19 broke out in early 2020, State University of Malang has implemented online lectures. This transformation creates new problems, including in Modern Physics experiment lectures. The fact is that when students was founded with the problem of assembling complex tools they are unable to implement their knowledge. The problems with Modern Physics experiment lectures that have existed for a long time are now exacerbated by the emergence of the COVID-19 pandemic. In overcoming this problem, the researcher implementation, management strategy with a systems approach as a solution with the consideration that this strategy is able to direct students to think critically. This study aims to improve students’ practical understanding and learning quality. This research was conducted in 2 cycles. The research instruments were questionnaires and experiment reports. Based on the data analysis of the questionnaire cycles I and II, it was concluded that the quality of the implementation of modern physics experiment learning was good with an average result of 88.38%. In addition, there is an increase in students’ practical understanding which can be seen from the average score of the experiment report, where the first cycle is 91.33 and the second cycle reaches 95.

Mentigen Hill, Mount Bromo is a tourist area located at an altitude of 2,392 meters above sea level. As a tourist destination in Peak Bromo, the sky at night has almost no light pollution, it will be very good for observing celestial bodies. For this reason, identification and measurements of the pseudo magnitude of star observations are made using a camera. Meissa star is a blue giant star type O which is included in the Lambda Orionis. The rate at which a star is observed from Earth is called its apparent magnitude. Analysis of the identification and measurement of the pseudo magnitude of the stars can be done using the Iris 5.59 software. Based on the results of the analysis in the Iris 5.59 software, it was concluded that the Missal Star was identified and the apparent magnitude measurement was (3.87 ± 1.10) with an error of 2.39%. It is suggested by the results of this study to develop astronomical tourism.

Inventory management on manufacturer and retail industries is commonly containing some uncertain parameters like future cost and future demand value where the decision-maker has to execute the optimal decision under these parameter’s uncertainty. While the data is available then these uncertain parameters can be assigned as a random variable and a probabilistic approach can be used to solve. But, if there is no data available for these uncertain parameters, then a fuzzy uncertainty approach can be used to solve this problem that is discussed in this paper. We have developed a mathematical model that can be used to calculate the optimal decision under fuzzy uncertainty where the decision is calculated and executed before the uncertain parameters are revealed. Numerical experiment results show that the problem was solved by using the proposed mathematical model, the optimal decision was achieved i.e. the optimal procurement volume product type and the optimal stored product volume in the inventory.

This paper describes about the design and development of Android mobile platform application in the learning of Indonesian Language for Foreign Speakers as the term used Bahasa Indonesia bagi Penutur Asing or as abbreviated BIPA. The Android Studio is used to create and set up a set of application programming interfaces (APIs) and Kernel Linux Platform. The interface program was designed to give effectiveness and flexibilities required in the process of learning. The program code was written and installed in the users Smart Phone. The official language programming used for Android development is Java to make the program running easily for the users to use the application because the mobile application does not use many resources. Once the application was ready, then installed into various types of Smart Phone with various Android platforms, and tested. The program was tested to BIPA foreign students who were learning BIPA Level A1 to see if the program ran well. This aimed to test its effectiveness and impact. The data of pre-test and interview were collected from foreign students who have already learned Indonesian language before and who were never in order to see the baseline of respondents competencies. Pre-test, Post-test and interview test scores were compared to see if there was an increase in respondents competencies. The research findings shows that there was a significant increase on the foreign students’ skills. The increase on the written test through pre-test and post-test showed by 30% and 18 % on the interview. In contrast, the most significant increase was occurred in the group of students who never learned before. This increase showed by 56%, whereas the increase in the group of foreign students who have already learned Indonesian language showed by 12%. Furthermore, this increase significantly also occurred in interview at 32% to the group of foreign students who never learned Indonesian language before and 8% to the group of foreign students who already learned Indonesian language. This findings shows that Mobile Application provides effectiveness, efficiency, flexibilities, and accelerated learning to the group of foreign speakers who never learned BIPA before.

This study aimed to explore the teacher’s perception of multiple representation in chemistry learning. The research design in this study was descriptive qualitative study. The participant in this study consisted of six chemistry teachers from several senior high schools in Indonesia. The semi-structured interviews were used for data collection. Each sample was asked about their perceptions of multiple representations in chemistry learning process. Data were analyzed by coding which were then grouped into themes. In this study, the researcher find that the teacher has actually applied chemical representations in chemistry learning, but the teacher is not yet familiar with the term of multiple representations in chemistry. Then, representations level that are often applied by teachers in learning chemistry are symbolic and macroscopic representations. Meanwhile, submicroscopic representations are still difficult to apply by teachers in chemistry learning process.

Blended Learning is a learning that combines face-to-face and online learning. In nursing practice courses, learning media about basic skills action procedures in nursing that can be accessed online is needed. Thus, it is necessary to design an instructional media containing action instructions for basic skills in nursing. The purpose of this research was to make video-based learning media as a guide to nursing procedures and to find out the results of the video-based learning media test. There were eight (8) stages in designing instructional media, namely: (1) writing video scripts, (2) taking video images, (3) editing videos, (4) validating, (5) revising, (6) uploading videos, (7) presenting videos to students, and (8) evaluating. This research was expected to produce teaching materials in the form of instructional video to support the lecturing process. The result of this study showed that the videos are very worthy.

Several types of chicken meat products that have high protein content. Chicken meat can be used as a processed nugget product which is a healthy food product, for example with the addition of natural ingredients derived from moringa leaves and cassava which have good nutritional content for humans. From the proximate analysis of Moringa and cassava leaves are rich in nutrients that are good for humans. The purpose of this study was to determine and identify the chemical parameters of chicken nugget products enriched by Moringa (Moringa poleifera) and cassava leaves (Manihot utilissima). By using sensory evaluation methods and effectiveness tests. Then the chemical parameters by conducting laboratory analysis. From the results of the study, the best sensory evaluation of the nugget product is the proportion of cassava and Moringa leaves by 50: 50%, with a yield value of 0.68. Chemical analysis shows that the best treatment is also in the ratio of 50: 50%. Chemical parameters such as protein 10.16%, Vitamin C 181.80 mg, Calcium 112.30 mg, crude fiber 9.40%. The addition of moringa and cassava leaves affects chemical parameters (protein, crude fiber, calcium) in chicken nuggets.

This development research aimed to design a 3D Flipbook e-learning module and determine students’ perceptions of the developed 3D Flipbook e-learning module. The research method used was development research with the ADDIE development model which consisted of Analyse, Design, Develop, Implement, and Evaluate stages. The instruments used in this study were validation sheets of material experts and media experts, pre-test and post-test quizzes, and questionnaire sheets. This feasibility of the developed 3D Flipbook e-learning module was verified by the content experts, media experts, and trials to the preservice teacher at Sultan Ageng Tirtayasa University. The validation by material experts obtained a percentage of 86.97%, the validation by media experts obtained a percentage of 89.65%, and trials to students obtained a percentage of 78.7%. Overall, it can be concluded that this teaching material is good and appropriate to be used to facilitate students in learning English in the mathematics profession. For data processing using normalized gain techniques, the results were obtained in the medium category 0.3 ≤ g

Food allergy and anaphylaxis are known to keep increasing in prevalence for over the years. Various efforts have been made to provide the solutions but they have not been proven very effective while on the other hand technological solution has not yet been much involved to support them. The main problem with food allergy is that people find it hard to access the information of complete ingredients, food-making process, and shared equipment that might be used in the process. The information is regularly needed by people with food allergy to determine whether the food is safe to consume or not. This paper will explain how the problems are solved by designing a food allergy information application using user-centered design (UCD) approach to facilitate the user needs with Gojek application as the study case. The outcome of this research is a high-fidelity prototype of the application. Usability testing is conducted for the prototype by using parameters such as completion rate, System Usability Scale (SUS) questionnaire, and User Engagement Scale-Short Form (UES-SF) questionnaire with corresponding results of 100% completion rate, 85.4 SUS score, and 4.23 UES-SF score which shows that effectivity and engaging as usability and user experience goals are fulfilled to answer the user needs.

Indonesia as the fourth most populated country in the world has inadequate informaton health care treatment. Moreover, the health index of the population of Indonesia is still relatively low compared to other countries. Medical record for example, no national medical record health information systems integrated which answer challenges to decision making services soon. Provincial health office no have medical record data which doctor need and adequate of information system for decision making to medical action. Indonesian district healthcare information based on raspberry (INDHCI) will be started of Indonesian district and concern in hospitals service healthcare, doctor and patient can communication. Will be built collaboration on district where need to integrate all hospitals healthcare data such as medical record, health facility for hospitals service data medical record collection with public and private community health center and the ministry of health of the Republic of Indonesia. The development will implement current technology such as Near Field Communication or NFC is the development of Bluetooth and RFID in which NFC provides communication technologies using Bluetooth to connect and RFID as a wave to connect to other NFC devices. NFC allows mobile phones to store necessary data safely and reliably. The data can be sent to other phones using NFC or read by an NFC reader. Then data can be save on Data Warehouse. Data can be used as Indonesian district health care information, Indonesian health research by institution and decision Support System by doctor to serve patient any where. The Indonesian district healthcare Information Model will be built in smartphone application, using the Internet of Things (IoT).

Our study intended to evaluate material on math test in elementary school. This study involved 63 elementary school students in Jakarta. We used a fraction number and geometry test as a parameter to know how strongly the substance of the test items to testing the students ability in performing the math test. The different item functioning (DIF) aspect in Rasch Model was applied to identify the existence of the bias on measurement to the tests that have been performed. The results of this study prove that the quality of the tests is excellent. Unfortunately, the students consistency of answered the test are inadequate. Furthermore, there is 1 item exposed bias on gender. Female students are the group that have benefits and vice versa, male students are a group that is disadvantaged in working on item No. 17 in math test. Differences in ability between male and female students in working on each item on math test is also an interesting focus that we short discussed in this article. These findings suggest that the structure of questions addressed by teachers during math test is unsuitable with students’ abilities and disadvantages students because of poorly recognizable students capacities.

The culinary business a few years back is showing a very significant development. Many things to be considered by culinary entrepreneurs, one of which is the business location. Location is a driver of cost and income, so locations often have the power to create business strategies. Strategic business location aims to maximize profits. The application "Luku" is a decision support application to choose the location of culinary business. This application was developed using Analytic Hierarcy Process (AHP) method. With this application is expected business actors can determine the location of the most strategic business in supporting his business accurately from several alternatives where the existing business. The test results show that the sequence generated from the created system is the same as the order created by the expert.

Differential equations arise in many fields of science and technology, when the deterministic relationships involving a continuously changing quantity (modeled by a mathematical function) and its rate of change (expressed as a derivative) are known or postulated. This can be seen for example in the problem of heat transfer. The problems raised in this study are how to model the heat equation and how to solve the heat equation model. The research was conducted to find a model of the heating equation in a rice dryer and solve the heat equation using the variable separation method. This discussion is carried out in two conditions, namely the steady state (constant time) and unsteady (changing time).

List of Keynote Speaker, Workshop Session, Conference Photoghraphs, Design freedom learning in mathematics, Enhanching student engagement in learning mathematics: The case of economics and business students in Universitas Gadjah Mada, Implementation freedom learning into mathematics learning based on mobile with a seamless learning approach are available in this pdf.

Nitrogen is an essential nutrient required by majority of plants to enhance metabolic processes for growing. Insufficient supply of nitrogen leads to severe plant disorders in flowering and fruiting; however, there are many false fertilizers available in markets. This project is focused on developing a smart method as a means for quality detection of nitrogen fertilizer. The smart ammonia analyzer was constructed on a normal smartphone which filled with Qpython3 software functions as an information processing application to analyze the level of nitrogen-ammonium and Color Grab application to process the RGB image of coloured product reaction of nitrogen-ammonium to be measured. The image of blue indophenol as the coloured product of the nitrogen was developed on a paper containing phenate reagent by releasing nitrogen ammonia from sample. The measurement process using the constructed “Smart Ammonia Analyzer’ involving taking image by smartphone camera, measuring image intensity on position with RED readings, and analyzing process to change the RED-value to concentration of nitrogen-ammonium. The chemicals used for colour formation of blue indophenol were 0.2 M NaOCl, 0.5 M HCl, 0.003 M MnSO4 M, and 2 M phenate with 0.1 M of NaOH for releasing agent of nitrogen fertilizer as ammonia. The developed smart ammonia analyzer resulted linear relation between the absorbance of blue indophenol image to concentration of nitrogen ammonia (y = 0.0181x + 0.2834, R2 = 0.9726) and has been successfully applied to nitrogen fertilizer. Development of smart ammonia analyzer has been achieved to provide an easy, inexpensive, and fast device for detecting quality of nitrogen fertilizer with satisfactory results.

List of Organizing committee, Steering committee, Editorial Board and Scientific Commitee are available in this pdf.

Stearoyl glycerol is the result of the esterification of glycerol with stearic acid enzymatically using immobilized lipase as catalyst. The lipase is immobilized with chitosan matrix with entrapment method. This study aims were to determine the optimum condition of esterification of glycerol with stearic acid based on reaction time and temperature, and reactant mole ratio. The esterification reaction was carried out by varying reaction time (6, 12, 18, 24, 30) hours, reaction temperature (30, 35, 45, 50, 55) °C, and mole ratio of stearic acid : glycerol (1: 1, 1: 2, 1: 4, 1: 6, 1: 8), the optimum conditions were achieved through conversion percentage. The produced ester was identified by FTIR spectrophotometer and characterized by the value of Hydrophilic-Lipophilic Balance (HLB). The results showed that optimum conditions on reaction time 24 hours, reaction temperature 45°C and mole ratio of stearic acid:glycerol (1:2) produced stearoyl glycerol with conversion percentage of 41.04% and HLB values of 5.01 that was included in the w/o emulsifier type. In addition, the FTIR spectra showed a strong absorption at wave numbers 1703.03 cm−1 (C=O), 1043.02 cm−1(C-O), and 3402.20 cm−1 (O-H) which indicated the characteristic absorption of stearoyl glycerol.

Chemical treatment like ionic liquid is known as a green solvent had developed to improve the compatibility of bacterial cellulose in many composite applications. This study aimed to know the influence of treatment using the ionic liquid on the morphology and structure of bacterial cellulose film (BCF). The methods used a BCF made of pineapples peels waste. Pellicle, as fermentation product as long as 14 days, washed by distilled water then immersed to an ionic liquid solution such as 1-Butyl-3-methylimidazolium chloride (BmimCl) for 2 h with concentrations of 0%, 2.5%, 5.0%, and 7.5%. Treated BC pellicle was dried in an oven for 6 h for obtaining bacterial cellulose film (BCF) then observed by XRD and SEM. The result showed that the treatment using BmimCl change the surface morphology and structure of of BCF. BmimCl solution with a concentration of 5.0% and 7.5% show cause some holes in the surface of bacterial cellulose film. BmimCl solution treatment changed the structure of BCF, indicated by the increasing the peak intensity of diffractogram at a diffraction angle of 14.4° and 22.7°. Crystalline content after treatment by BmimCl with concentrations of 0%, 2.5%, 5.0%, and 7.5% were 73.85%, 73.50%, 71.33%, and 72.81%, respectively.

The paving block is part of pavement system that is widely used by people in Indonesia. Paving blocks are common in urban and rural communities. Paving blocks are very easy to make and easy to apply. Standard way of making a paving block based on SNI 03-0691-1996 method is a mixture of cement, sand/gravel and water. Excessive use of natural materials has an impact on the sustainability of the natural environment. This problem can be solved with various innovations without having to reduce the quality of paving and the pavement itself. Wiwoho, M. S., et. al., [1][2] has conducted preliminary research using bamboo materials instead of aggregates. Whilst Bamboo trees are fast-growing plants and are widely used as merely buffer buildings. So, Bamboo waste materials have not been used optimally enough. The methodology used is that unused bamboo materials being cut in to the size of the required model. The use of bamboo material as a mixture in paving block has adjusted the size, and its composition. The result of this research is that paving blocks made from bamboo trees can meet SNI 03-0691-1996 standard with D quality. Thus, paving blocks can meet eligibility requirements, reasonably enough.

This article is addressed to show the result of a probabilistic mathematical model implementation in Sewon, Bantul facultative wastewater treatment pond to analyse the performance of the pond. The model was developed in a probabilistic quadratic optimization model and was solved by using probabilistic programming by using deterministic equivalent approach. LINGO 18.0 optimization software package was employed to do the computation. The optimization result was giving the optimal decision value for the wastewater volume that should be processed in the pond in order to gain the best performance and the storing time of the wastewater for each facultative pond. For each facultative pond, the load volume of the wastewater should be 1199.5 kg where the storing time is 13.2 day for the first pond, 13.24 day for the second pond, 25.59 day for the third pond and 30.30 day for the fourth pond. This optimal decision, then, can be used by the decision maker (WWTP operator) in order to optimize the performance of the treatment ponds.

The noise sound can be potentially arisen by the usage of machine and work tools that support the production process. PDAM Tirtanadi is a company runs provincial water supply engaged in the drinking water processing. However, the machine and tools of the company can generate the noise. Thus, the paper aims to find out the noise intensity of 5 points measurement in booster pump, then determines the correlation towards communications disruption, psychology and physiology. Then, the sound pressure level measurement method refers to Indonesian Minister of the Environment Decree Number 48 Year 1996, and the sound level meter was utilized as means for the research. The result shows that the noise intensity gained of 5 points passed the noise Threshold Limit Value (TLV) as much 96.40dB – 96.75dB. Moreover, the noise level has a significant influence towards the communications, psychology and physiology disruption, which the R value of multiple correlation as much as 0.884.

ICT and education seem inseparable. To improving the quality of learning process, ICT become the medium to assist the lecturer to transfer the knowledge to the students with more interactive. The study examined the moderator effects of demographic variables to influencing the usage of ICT towards learning process. A total of 260 respondents were selected from 733 of lecturers in three largest private universities in Medan, Indonesia. Data were collected through a survey among the participants manually. The research employs the Pearson Correlation to determine the relationship between variables and to test the hypothesis, the study uses the Simple Linear Regression and Hierarchical Regression. Result reveals that gender and educational level have no significant moderation. In contrast, teaching experiences, age, and department origin yet significant and positively as the moderator. Moreover, ICT usage is significant to impacting learning process.

The purpose of this study is to develop a digital-based Sit-Up Test instrument that is effective in use and is efficient in economic terms. This research is a development research with a model design adapted from Borg & Gall. With a population and sample of students of the Faculty of Sport Sciences, Padang State University, amounting to 10 people for small groups and 45 people for large groups, and 5 experts as validators for testing tools. validation. Data was collected using questionnaires and tool trials. Through the test of produck moment validity and reliability test of Test and Retest. The process of development and trial of this tool is done by validating experts by using questionnaires as an instrument of validation and obtained an average percentage of 96%, the results of small group trials obtained a correlation level of 0.99 and reliability tests with direct trials of 0,92 with a very strong reliability category

This development research aims to develop an interactive mathematics e-module using Visual Studio in the curvature material for the ninth grade students of junior high school. The study was conducted to find out the attractiveness, convenience, usefulness, and effectiveness of the e-module at MTs Negeri 2 Bandar Lampung. This study aims to produce teaching materials in the form of an e-module that is suitable for the learning objectives. The method refers to the 4D research and development (R & D) design (Define, Design, Develop, and Disseminate). The final product produced obtained an average score of 3.46 in the field trial with very interesting criteria. The effectiveness test results show that the e-module is effectively used as learning media because they get a value of n Gain of 0.38 with moderate criteria and 93% of students have completed the value of mathematics Minimum Completion Criteria (KKM) that has been set, 73.