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The manufacture of wind turbine blades has a very high risk of failure, especially in the manufacturing section or in this case the material structure. If the structure of the propeller material is not able to withstand the very high pressure and air flow, it will result in the failure of the material structure when it is in use. For this reason, the purpose of this study was to determine the composition of composite materials that have high strength and toughness properties and are suitable for wind turbine propellers. The method used in this research is experimental. The independent variables include the number of layers and the volume fraction of straw fiber. The dependent variables are shock load and compressive strength. Each compression test specimen is made with a gauge length of 100mm, a width of 25mm, and a thickness of 2.5mm. While the impact test specimens are made equal to l25mm long, l2mm wide, l2mm high, and 2mm notch. The results showed that the bending strength of the straw fiber composite with 6 layers had an increasing trend as the number of layers increased. The highest bending strength with the number of piles of 6 layers and the lowest strength with the number of piles of 2 layers. In addition, the volume fraction is very influential on the bending stress of the straw composite matrix. It can be seen that the matrix with a volume fraction of 50% has the greatest bending stress in each number of layers, both 2, 4 and 6. For the impact test, it is found that the optimal number of layers occurs in the number of 2 layers with a volume fraction of 33%. The shock load tends to decrease. Meanwhile, based on the volume fraction, the larger the volume fraction, the smaller the shock load that can be received by the straw fiber composite material.

Introduction: Benzene is a carcinogenic compound commonly found in drilling fluid, a chemical used in oil and gas drilling operations. Benzene exposure to workers is known to cause acute and/or chronic disease. Adequate control measures shall be identified and implemented to prevent the adverse health effects of benzene from the utilization of drilling fluid. Methods: This study measured benzene concentrations at several locations, above the drilling rig, which has the potential risk of benzene vapor exposure. From the measurement results, if the threshold limit value was exceeded, LEV was proposed to be installed and the effectiveness of LEV at each location would be assessed. A two-tailed t-test was used with a confidence level of 95% (α=0.05) to measure the effectiveness of LEV. Results: In several areas, benzene concentration exceeded TLV-TWA, and LEV was installed in those areas as control measures. In this study, it was found that LEV was not always effective in reducing the concentration of benzene in some areas. Conclusion: Drilling fluid was essential for drilling activity, and this could cause benzene vapor to contaminate the working area. The installation of the LEV shall consider the type of containment through which the drilling fluid flows to ensure the mitigation measures are effective to reduce the concentration of benzene in the air that may be exposed to workers.Keywords: benzene, drilling fluid, exhaust ventilation

The World Health Organization has officially declared the coronavirus as a pandemic The impact of the pandemic is also experienced by children. Children experience major changes in their lives, one of which is child psychosocial. Psychosocial support needs for the children. This study aims to determine the effect of emotional ventilation on the psychosocial development of school-age children during the Covid-19 pandemic. This research design is a quasi-experiment with a one-group pretest and posttest design approach. Respondents were 43 school-age children. Psychosocial development was assessed using the Strengths and Difficulties Questionnaire (SDQ). Emotional ventilation is done once a week and twice a week. a week after the second intervention, a post-test was performed. The results showed that before the intervention prosocial behaviour, emotional problems and hyperactivity were mostly normal, behavioural problems and relationship problems with peers before the intervention showed mostly abnormal. After prosocial behaviour intervention, emotional problems, behavioural problems and hyperactivity were mostly normal and only peer relationship problems were still mostly abnormal. There are differences between emotional problems, behavioural problems, hyperactivity before and after emotional ventilation with a p-value ≤ 0.05.

Generally, metals are easy to wear, so material modification is needed to increase hardness to increase the material's resistance to wear and tear. One way is to do a hard chrome plating process using the electroplating method and then continue the heat treatment process. This research was conducted to observe changes in the mechanical properties and microstructure of S45C steel that underwent hard chrome and heat treatment processes. This research was conducted by inserting S45C steel as a cathode into hard chrome liquid and using lead (Pb) as the anode. A positive (+) current powers the anode, the cathode has a negative current (-), the voltage used is 12 V with a duration of 60 minutes. After the cathode was coated with hard chrome, a hardness test was carried out, then continued with the heat treatment process using a temperature of 850°C for 30 minutes. The hardness test results show an increase in the hardness of S45C steel that has been coated with hard chrome, with a hardness value of S45C steel 202.70 VHN, S45C hard chrome steel 998.63 VHN. The highest hardness value is S45C steel coated with hard chrome 998.63 VHN, increasing 392.7%. Then the heat treatment process experienced a decrease in the hardness value, 528.90 VHN, with a percentage of 88.81%. The results of the microstructure observation showed that the hard chrome layer that had been heated treated showed even cracks in the hard chrome layer.

Indoor positioning and navigation now contribute in many applications to track and direct people inside the building. The popular trilateration technique is utilized to detect user’s position through three access point of Bluetooth low energy. However, received signal from Bluetooth has insignificancy due to the noise, multipath, fading or other radio propagation. A study of received signal characteristics in specific indoor locations must be considered to predict and improve the accuracy of estimation. In this case, the adjustment of raw received signal readings is essential. we extracted linear regression model by compare between raw and analytical value of received signal power. Then, utilizing the corrected received signal, finding the best suitable path loss exponent model is required in order to minimize position estimation error. The last step is applying the additional model and the chosen path-loss on LabVIEW as a mean to visualize position and navigation system. The result yield that the new model gives lower error on 2 out of 3 access points. The corresponding path loss exponent n = 2.1 is selected to comply with the indoor environment in this case. The lowest RMSE yields 1.24 and considered as a good level of accuracy. The Navigation system worked well providing route to the desired location in the Laboratory.

Tirta Sanita Bogor brine water contains high concentrations of sodium (Na). It also contains calcium (Ca) and magnesium (Mg). The purpose of this research is to make the food grade salt with relatively low Ca and Mg content. The process was carried out in two methods, the first method was chemical precipitation which was divided into two stages, the removal of the Mg element using a limestone compound (CaCO3) which has been calcined at 900 ̊C for 6 hours, and the removal of Ca element using Li2CO3 compound. The second method was traditional evaporation which was conducted using prism greenhouse technology. The brine filtrate was reacted with Na2CO3 and the results were analyzed using the ICP-OES. The results showed that the NaCl content was 80% by the chemical precipitation and traditional evaporation methods. Keywords: Brine water, Precipitation, Evaporation, Food grade salt

Perancangan sensor radar untuk sense and avoid (SAA) sistem pesawat tanpa awak (UAV) bertujuan agar operasi teletransport alat kesehatan dengan UAV VTOL berjalan dengan aman terhindar dari kecelakaan tabrakan di udara. Sensor radar ini didesain dengan bahan duroid 5880 dengan dielektrik konstant 2.2 dan ketebalan subtrate 1.57 mm. Bentuk antenna circular dan bekerja di pita ku-band 14 Ghz. Terdapat dua sensor untuk Tx dan Rx dalam satu substrate. Hasil simulasi sensor menunjukkan bandwitdh yang lebar 1.5 GHz sehingga mampu menghasilkan resolusi range sangat baik yaitu 9.2 cm. Penguatan antenna dihasilkan 7.32 dB dan sudut beamwidth sensor 83O arah azimuth dan 78.2O arah elevasi. Sensor ini akan disematkan pada sistem SAA dengan algoritma neural network yang mendrive manuever UAV VTOL berbelok kesamping pada sudut dan jarak yang tepat sehingga terhindar dari tabrakan dengan objek penghalang.AbstractThe design of the radar sensor for the sense and avoid (SAA) system of unmanned aircraft (UAV) aims to make teletransport operations of medical devices with UAV VTOL run safely avoiding collisions in the air. This radar sensor is designed with duroid 5880 material with a dielectric constant of 2.2 and a subtrate thickness of 1.57 mm. The antenna is circular and works on the 14 Ghz ku-band band. There are two sensors for Tx and Rx in one substrate. The sensor simulation results show a wide bandwidth of 1.5 GHz so that it is able to produce a very good range resolution of 9.2 cm. The antenna gain was 7.32 dB and the beamwidth angle of the sensor was 83O in the azimuth direction and 78.2O in the elevation direction. This sensor will be embedded in the SAA system with a neural network algorithm that drives the UAV VTOL maneuver to turn sideways at the right angle and distance so that it avoids collisions with obstructions.

This study aims to examine the use of E-learning based on LMS for college students with special needs during the Covid-19 pandemic. The method used in this research is a literature study, where the researcher collects relevant data to support the researcher’s ideas. Based on the literature review results, the use of E-Learning based on LMS Edmodo, Schoology, and Learnboost has the same effectiveness despite having different levels of ease of use. Meanwhile, the most frequently used E-Learning based on LMS at the university level is Moodle. In its utilization, E-learning based on LMS has five standard features. So that these five features can be used optimally by students with special needs during the Covid-19 pandemic, things that need to be considered are: (1) particular guidelines for the use of E-Learning based on LMS are available for college students with special needs; (2) audio is available that can be used by college students with visual impairments, (3) sign language is available as an interface so that college students can access it with hearing impairments, (4) available text on lecturer materials in the form of video or audio so that it can be accessed by college students with hearing impairments, (5) there is a virtual keyboard feature available in E-Learning based on LMS which allows college students with physical and motor disabilities to use the mouse to type or do other activities on the computer, (6) the features available in E-Learning based on LMS are designed to accept voice input.

A tool that can predict water quality by capturing sound vibrations generated by collisions between water samples and light is LPAS (Laser Photo-Acoustic Spectroscopy). To process the data acquired by LPAS, spectrum correction is needed to eliminate data errors when making acquisitions on water samples. The correction method used in this research is the cutting edge filtering correction method. The regression model that can be used is the PLSR (Partial Least Square Regression) regression model. This research was conducted in the Instrumentation and Energy Laboratory, Agricultural Engineering Study Program, Faculty of Agriculture, Syiah Kuala University. Water sample analysis was carried out at the Laboratory of the Industrial Research and Standardization Center (BARISTAND) Banda Aceh. This study used 4 monitoring wells within the TPA (Final Disposal Site) and 4 samples were taken from community wells outside the scope of TPA Gampong Jawa, Banda Aceh City. The results of this study indicate the parameters (temperature, turbidity, Ph, TSS, DO, BOD and Nitrate) are predicted to be in the frequency range 4000 - 10,000 cm-1. Raw spectrum data for pH and Nitrate (NO3-) parameters produce better data than the spectrum data for cutting edge filtering correction methods while cutting edge filtering spectrum data for temperature, turbidity, TSS, DO and BOD-5 parameters are better than spectrum raw data. This study also shows that the cutting edge filtering correction method is able to cut boundaries and compress the spectrum so that it can provide data limits on the spectrum so that the PLSR method can be applied to predict water quality. Keywords: water quality; Laser Photo-Acoustic Spectroscopy, correction method, regression method

This paper aims to explore the potential of da'wah in the city of Semarang with a data mining approach. The data mining approach is carried out by implementing the fuzzy c-means (FCM) algorithm in order to obtain the optimum number of clusters in the potential clustering of da'wah in the city of Semarang. The data used in this study from the Ministry of Religion of the Republic of Indonesia and the Central Statistics Agency (BPS) of Semarang City. The results of the FCM analysis show that the optimum number of clusters is two clusters, where the sub-district in the second cluster is an area with a high potential for da'wah. This study provides information that in effective da'wah activities, certainty and clarity is needed regarding the targets of da'wah through mapping of da'wah in the form of clustering potential da'wah. This can be a consideration of dakwah strategies for the successful implementation of da'wah studies so that an increase in the target behavior of da'wah can be achieved. The application of FCM to get the optimum cluster of potential da'wah in order to produce da'wah mapping is novelty in the field of Islamic studies, especially the science of da'wah. Normal 0 false false false IN X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; text-align:justify; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman",serif; mso-ansi-language:EN-US; mso-fareast-language:IN;}

Background of the study: This study examines users’ education as correlates of library resources utilization by undergraduates’ in selected universities in Kwara State. The study identified five (5) research questions and two (2) research hypotheses. Purpose: The study adopted descriptive where set of questionnaire were used to collect data. Stratified random sampling technique was used for this study, it was a sampling technique considered appropriate because the researcher intend to divide the two universities into strata, that is, faculty and college making a total of 15 and 5 faculties/colleges in University of Ilorin and Kwara State University respectively. Raosoft calculator was used to select sample size of the study at 95 % level of confidence. So, the total population for this study thus 382. Method: Data collected were analyzed using descriptive statistics of frequency count and percentages while Pearson Product Moment Correlation (PPMC) was used to test the two hypotheses of the study. Findings: The study revealed that majority of undergraduates’ are of opinion that users education has being a major mechanism to effective utilization of electronic information resources in University of Ilorin and Kwara state university Conclusion: The study also concluded that textbooks, journals, indexes and abstracts, newspapers, CD-Rom and databases, internet are major information resources provision in the selected universities while the provision of Video tapes/cassettes are less provided in the library

This study aims to develop functional food project learning tools for the food chemistry course. This project learning tools consist of an implementation guide accompanied by a project appraisal rubric. The development of learning tools was based on the Dick and Carey model with three stages: needs analysis, development, and validation. The needs analysis shows an increase in non-communicable diseases in Indonesia and the world. Functional food has not been taught in food chemistry courses and the abundance of local food in Lombok Island with its various functional potency. The development stage involves designing project instructions accompanied by an assessment rubric. Two experts in food chemistry carried out the validation stage of the project learning tools. The instrument used was a questionnaire related to the suitability of the project objectives with the learning outcomes of food chemistry, the clarity of project-based learning syntax, the relevance of project topics to Lombok food, aspects of the language used, and an assessment rubric. The results show that all validated aspects are accepted with a few notes which have been further improved. Thus, the project learning tools can be used for functional food projects in food chemistry courses.

Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis which usually attacks the lungs. The increasing number of TB patients will result in an increase in TB transmission in the community. The lack of prevention measures of TB transmission occurs because the patient has less motivation in preventing the transmission of disease. This study aims to determine the relationship of family social support with patient motivation in preventing transmission of pulmonary TB in Negara Sub-district 2019. This study is quantitative study and used a cross-sectional design. The population in this study was pulmonary TB patients in the Negara sub-district with a total sample of 43 respondents. The research sample used a Simple Random Sampling technique. Analysis of the study using Spearman’s Rho. Family social support the most lung TB people are in good category 37 (86%). The motivation of patients in preventing the transmission of the most lung TB in the category of good 40 (93%). The results of the research analysis state P = 0.005 (P = 0.05). There is a relationship between the social support of the family with the motivation of the patient in preventing the transmission of lung TB.

Dental health remains a public health problem with increased the prevalence of dental problems from 2007 to 2013. The problem is highest in the early adolescent age group. A dental problem occurs due to lack of behavior on the routine toothbrush (2.8%). The purpose of this study was to describe dental problems in Islamic boarding schools in Medan. This study used a cross sectional design in seven Islamic boarding schools in Medan with a total sample of 436 students in the 5.319 total population. System random sampling was applied in this study and the questionnaire was distributed to sample. The data analysis used was descriptive frequency. The results showed that the behavior of brushing teeth based on age group was highest in the early adolescent group in the category of brushing teeth in the morning (78%) and afternoon (92%). Based on gender, both men and women showed the highest tooth brushing behavior in the morning (37.8%; 40.4%) and afternoon (45.9%; 46.6%). Dental health problems by age group were included in the category of healthy teeth (49.1%). Based on gender also showed dental problems for both men and women (25.9%; 24.1%) in the category of healthy teeth. Dental health among female students is still found to have dental health problems caused by the behavior of brushing teeth that is not in accordance with the recommendations of the Ministry of Health, namely after breakfast and before going to bed at night.

One of the post-harvest honey processing processes is the pasteurization process. Pasteurization is the initial stage of honey processing before evaporation. The high demand for honey in Indonesia requires that honey producing companies must use pasteurization tools with large capacities and do not damage the honey content. Honey will be damaged if the pasteurization temperature is more than 70oC. In addition, the pasteurization process is also still a problem in the honey industry. Therefore it is necessary to make pasteurization tools with automatic and fast temperature control in the pasteurization process. The purpose of this study was to observe the rate of heat penetration into pasteurized honey material and the amount of honey weight pasteurized, then also measured changes in water content, viscosity, degree Brix, and density of density. From the results of measurements of heat penetration rates in pasteurization and conventional pasteurization devices, the difference in time duration on stoves 1, 2, and 3 to increase the initial temperature of 35 oC to 65oC respectively were 45, 45, and 42 minutes with a total of 101 honey, 22 kg while in conventional equipment takes 50 minutes to heat honey as much as 46,780 kg. Gas consumption on stove 1 was 0.291 g/(kgoC), stove 2 was 0.281 g/(kgoC), stove 3 was 0.285 g / (kgoC), whereas gas consumption on conventional stove was 0.272 g/(kgoC). The results of measurements of water content, viscosity, Brix, and density of density before and after pasteurization were as follows 21.99%, 4.835 poise, 63 obrix, 1.356 kg/m3, and 19.82%, 5.453 poise, 64 obrix, 1.358 kg/m3.

An unmanned Aerial Vehicle (UAV) is a type of unmanned aerial vehicle which is controlled by a remote system. This type of aircraft is usually controlled by remote control from outside the plane and can also move automatically based on a program that has been programmed on the computer system. In this study, a control system with autopilot and remote control is used. This study aims to apply the ardupilot system to the super heavy model aircraft with a long-range flight mode control system using the Futaba T8J (8 channel) radio control. The results of this study took a flight time of 15.02 minutes with an altitude of 30 meters, a waypoint radius of 20 meters with a speed of 10 m / s.

Mortalitas sepsis dan syok sepsis hampir 20% per tahun dari semua kematian global. Sepsis dan syok sepsis merupakan penyebab 50% pasien dirawat di Intensive Care Unit (ICU). Kristaloid menjadi terapi cairan yang tepat menurut “The Surviving Sepsis Campaign Bundle: 2018 (SSC 2018)”. Kristaloid terbagi menjadi dua jenis, yaitu balanced dan unbalanced crystalloids. Perbedaan kandungan elektrolit keduanya dapat memengaruhi outcome pasien. Penelitian ini bertujuan mengetahui perbedaan pengaruh balanced dan unbalanced crystalloids pada sepsis dan syok sepsis dalam aspek mortalitas, kejadian hiperkloremia, dan lama tinggal di rumah sakit (RS). Metode yang digunakan adalah systematic review. Tempat penelitian berupa pencarian artikel penelitian pada online database dengan waktu penelitian, yaitu artikel dari tahun 2017 hingga 2021. Seleksi studi menggunakan PRISMA, kirteria restriksi dan PICO. Telaah artikel didapatkan 6 dari 249 artikel yang memenuhi syarat. Hasil analisis adalah mortalitas lebih rendah pada grup balanced crystalloids, kejadian hiperkloremia lebih tinggi pada unbalanced crystalloids, namun lama tinggal di RS di kedua grup tidak ada perbedaan signifikan. Simpulan penelitian adalah balanced crystalloids lebih efektif daripada unbalanced crystalloids dalam aspek menurunkan mortalitas dan kejadian hiperkloremia, namun tidak mengenai lama tinggal. Differences in the Effect of Balanced and Unbalanced Crystalloids as Fluid Therapy in Sepsis and Septic Shock: A Systematic Review Sepsis and septic shock contribute to almost 20% per year to the global total deaths. Sepsis and septic shock are also the the leading causes for patients to be treated in the Intensive Care Unit (ICU), with 50% of the patients treated in this unit due to sepsis and septic shock. Crystalloid is the appropriate thereapy for these conditions according to “The Surviving Sepsis Campaign Bundle: 2018 (SSC 2018)”. Crystalloids are divided into two types: balanced and unbalanced crystalloids. This study aimed to determine the difference between the effects of balanced and unbalanced crystalloids in sepsis and septic shock in terms of mortality, incidence of hyperchloremia, and length of stay in hospital. This was a systematic review on articles from the last five years using PRISMA, restriction criteria, and PICO. The review resulted in 6 out of 249 eligible articles. The results of the analysis demonstrated a lower mortality rate in the balanced crystalloids group while the incidence of hyperchloremia was higher in the unbalanced crystalloids group. No significant difference was found in the length of stay in hospital in both groups. Therefore, balanced crystalloids is more effective than unbalanced crystalloids in the aspect of reducing mortality and the incidence of hiperchloremia, with no significant difference in the length of stay in hospital.

This paper examined the Jogo Tonggo policy issued by the Central Java Provincial Government in the face of the Covid-19 pandemic. Methodology: This research is a qualitative descriptive, data were collected by in-depth interviews with respondents who were selected by snowball sampling. The research was conducted in Purworejo Regency. Result: The Covid-19 pandemic changed the pattern of relations between communities through the local (village) self-contained quarantine that was enforced in villages. Several village-level social activities were canceled to avoid crowds. Jogo tonggo begins with the provision of PPE and disinfectant equipment. Community solidarity with neighbors is established as usual, even better, for example helping neighbors who must self-quarantine. The form of solidarity that is carried out is by taking turns providing foodstuffs for 14 days of quarantine with a varied menu managed by the PKK or Dasawisma group. The community also routinely works together in spraying disinfectants, guarding the entrance portal which is managed in rotation. Recommendation: This movement needs to be continuously advocated so that people who are getting fed up with pandemic conditions remain vigilant and do not ignore health protocols. It is also necessary to think about a stimulus for villages to assist with foodstuffs, medical devices and internet quota packages for school children. Keywords: Social solidarity; neighborhood; helping each other

Students experience problems while working in Math, with full of difficulties. They made mistakes in the process of solving questions. The error process that occurred in students leads to the low achievement of the learning outcomes. This research aimed to investigate the mistakes made by MTs students in working on the questions of the Cartesian coordinate integrated with Malay cultural nuances in Riau Province. The study was conducted at MTs in the odd semester of the 2019/2020 academic year. A descriptive approach was used as a research method with a purposive sampling technique. This technique used a test and interview to collect research data. The results of the study described that the errors faced by MTS NurulBilad students included: (1) 55% of misconceptions because students did not understand the concept in the material of Cartesian coordinate (2) procedural errors that 76% of students did not match the stages or steps in the process of drawing on the Cartesian coordinate. Based on the findings, it was hoped that the teacher emphasized more understanding about the concept of Cartesian coordinate.

Internet of Things (IoT) is a system that connects devices directly or indirectly to the internet. The device can work with remote control. One application of the IoT system on the watering system is able to provide an approach to the ease in the process of growth and development of plants. The research carried out was applied to an IoT-based smart plant watering device. The tool is supported with a soil moisture measuring sensor that acts as a benchmark to determine the condition of soil moisture and automatic control of the process of watering plants. The process of watering plants is scheduled in the morning and evening. Information, as long as the device is run will be displayed on the LCD and screen of an Android-based smartphone application. The data can be a comparison value to determine the suitability of soil moisture data in plants. The volume of water supplied in the watering process also affects the level of soil moisture. IoT-based smart plant sprinklers can automate watering by measuring the percentage of soil moisture as a benchmark for providing water during the watering process. Remote watering control can also be done on this tool by using a WiFi signal to the same access point that is connected to the smartphone client and microcontroller. Keyword: agriculture, automatic sprinklers, engineering, IoT

Congenital toxoplasmosis can cause damage and death to the fetus, to prevent this case, toxoplasmosis testing is important for the woman of childbearing age. One of the methods to screening the presence of T. gondii in the blood is Polymerase Chain Reaction (PCR). One of the T. gondii genes which can be used as a marker is the B1 gene. There are many toxoplasmosis cases in Indonesia, but the data is still difficult to find in West Bandung Regency. This study aimed to determine the number of toxoplasmosis cases in a woman of childbearing age in West Bandung Regency using the B1 gene as a marker and to determine the factors that influence these cases by conducting statistical analysis on the results of the questionnaire. The sample used in this study was 50 women of childbearing age (got married and domiciled in West Bandung). All samples have met the inclusion criteria and signed the informed consent. DNA from blood specimens was isolated using the Wizard Genomic DNA Purification Kit. The concentration and purity of isolated DNA were measured using a nanodrop device. Besides, the B1 gene from T. gondii was amplified using a pair of specific primers and visualized by the agarose electrophoresis method. Data were analyzed using the logistic regression method. The results showed that 7 women of childbearing age women (14%) in West Bandung Regency had toxoplasmosis. Frequent contact with pets, especially cats, was a significant factor (p

Classroom light intensity is one of the essential factors in the learning process. Several factors affect light intensity in the classroom, i.e., determination of classroom design, position of objects in the classroom, window design, shading devices, type of lamp, and type of lamp armature. The research aims to determine the effect of armature lamp type. The results of this research are expected to increase the efficiency of electricity costs and use the classroom optimal lighting system according to Indonesian National Standard (SNI). Two types of lamp armature used in this research i.e. LED tube armature and LED bulb armature. This research used E11-210 classroom in E11 Building of Electrical Engineering Department, Universitas Negeri Semarang with the size of 12m x 9m x 3.5m. Simulation in this research used Dialux Evo 9 software. The results of observations and simulations show that E11-210 classroom had not followed SNI yet, in 350 lux. Based on simulation results, it shows that using LED tube armature and LED bulb armature will get light intensity of E11-210 classroom that follow SNI 6197:2011. Simulation results show that the use of LED tube armature (Powerbalance Gen2 RC463B) in E11-210 classroom will increase efficiency of electricity costs by 27.81%. Meanwhile, the use of LED bulb armature (Luxspace Ace Acccent RS750B) in E11-210 classroom will increase efficiency of electricity costs by 33.96%.

The aim of this research was to detect the skin which comes from goat and pig using PCR-RFLP method so the raw material used in rambak product was discovered. The comparison of combination between goat and pig skin was 100, 75:25, 91:9, 94:6, 97:3, and 99:1. PCR-RFLP uses the universal primary from from mitochondria cytochrome b gen which results in the length of fragment of 359 bp. The restriction enzyme used in the DNA cut is BamHI enzyme and BseDI enzyme. The result of the research showed that seven samples have been successfully isolated perfectly so the total bands of genomic DNA have been obtained which is clearly seen and amplification with target of cytochrome b gen results in PCR product of goat and pig of 359 bp. The digestion's result using BamHI enzyme gets fragment size on 359 bp in length on goat samples and length of fragment size of 359, 244, and 115 bp on samples which contain pig. The digestion results of using BseDI results in fragment size of 359 bp in length on goat samples and the fragment size of 359, 228, and 131 bp in length on samples which contain pig. The conclusion of the research is PCR-RFLP using BamHI enzyme and BseDI enzyme can be used to detect the types of pig skin, but can't be used to detect the goat skin.

This study provides an overview of the validation results of teachers and media experts to assess the LIAA (Linguistic Intelligence Assessment Android) application, using the research and development method. This method is used to develop a product and tests its effectiveness. However, this article is just for developing and design ing LIAA. The results of the study showed response proportion: 78% for the teacher's language use , 84% for ease of application, 75% for final clarity of assessment, 84% for the presentation , 72% for the average of the final assessment test . Validation from media experts to assess the appropriateness of using the LIAA application with an average of 88% (very valid category ) . So it is concluded that the LIAA application can be applied on a wide scale in measuring the linguistic intelligence of elementary school students.

Induction motor is electromechanical equipment that is widely used in various industrial applications. The research paper presents the detection of the defect to three-phase induction motor bearing using discrete wavelet transforms and artificial neural networks to detect whether or not the motor is damaged. An experimental test rig was made to obtain data on healthy phase currents or damaged bearings on the induction motor using the motor current signature analysis (MCSA) method. Several mother-level wavelets are chosen on the wavelet method from the obtained current signal. The feature of the wavelet results is used as an input of the Artificial Neural Network to classify the condition of the induction motor. The results showed that the system could provide an accurate diagnosis of the condition of the induction motor.

Turbines convert the kinetic energy of ocean currents into electrical energy produced by the sea current electric power plant. This study aims to design a power generator turbine modeling that is carried out using the Computational Fluid Dynamic (CFD) approach by comparing the geometric performance based on the angle of attack and the Tip Speed Ratio (TSR) value of the Savonius-Darrieus Turbine. Having done several trials and errors during collecting the data, the value of the TSR 1.427; 2.853; 4.28; 5; and 5.7 is proposed. Here, the NACA 0018 series has been adopted on the current design of Savonius-Darrieus Turbine. The turbine has three blades, length of the span 357 mm, the diameter of turbine 428 mm, and length of the hydrofoil chord 40 mm. Effect of various angle of attacks from 0°up to 10° has been taken into account in the computational to obtain the coefficient power for each variation. The results revealed that the turbine with an angle of attack of 5°and TSR value of 5.0 has higher power coefficient value by 0.469 as compared with its angle of attack of 10°. It should be noted here that the increase of the angle of attack up to 10° resulted in a significant reduction of the power coefficient value of 0.206 as the value of TSR about 4.28. The addition of the Savonius Rotor results in increasing efficiency of the turbine for sea current applications.

Sistem informasi perpustakaan Politeknik Caltex Riau yang datanya mulai terorganisir dari tahun 2013 sampai dengan saat ini,tercatat terdapat 5.477.618 koleksi perpustakaan yang terdiri dari buku, majalah, jurnal, CD dan lain sebagainya. Sementara jumlah transaksi peminjaman setiap tahunnya terus berkembang, walaupun perkembangannya belum signifikan, tercatat sekitar 3% setiap harinya. Untuk membantu proses analisis pola data perpustakaan, telah dibuat sistem berbasis web dengan menggunakan teknologi OLAP (Online Analytical Process), dengan pemodelan data berbasis multidimensi data. Untukmembuktikan kesederhanaan perancangandata berbasis multidimensi, waktu akses dan efisiensi join, pada penelitian ini pemodelan data yang pilih adalah star schema. Hasil pengujian menunjukan bahwa kinerja star skema pada data perpustakaan dipengaruhi oleh jumlah data, proses pembersihandata serta jumlah join.

Population growth is a big problem for a country. The number of couples of childbearing age who using contraception should be increased in order to deal with this problem. Based on the results of the 2017 Indonesian Health Demographic Survey (SDKI), the number of couples of childbearing age using contraceptives was 57%. To increase the use of contraception, it is necessary for health facilities to play a role not only as providers of contraception, but also as providers of promotive and preventive services, so that couples of childbearing age can rationally choose the contraception to be used as needed. This research aimed to discover the relationship between contraceptive service sources and the modern contraceptive method used by couples of childbearing age. This research used the secondary data from the 2018 Program Performance and Accountability Survey of Population, Family Planning, and Family Development (abbreviated SKAP-KKBPK in Indonesia), using the cross-sectional research design and the Chi-square bivariate analysis. The population used in this research was all couples of childbearing age in Indonesia who becomes responden in SKAP-KKBPK, which were 60.599 couples, and the samples were all couples of childbearing age who used modern contraception, which were 26,776 couples. The research known that as much as 76,9 % couple of childbearing chose to use short-term contraceptive methods and 76,51 % choose visit to a source of private service contraceptive to get those contraceptives. Couples of childbearing age who use short-term contraceptive visit to private service contraceptive (85.9 %) and couples of childbearing age who use long term contraceptive visit to government service contraceptive (52.6 %). The conclusion of this research is the relationship between source service contraception with modern contraception method used. The source service contraceptive must to offer the quality service to encourage.So that couples of childbearing age can rationally choose the contraception to be used as needed.

Organic waste is a type of waste produced by many sector, which need to managed appropriately. During its development, composting is one of the organic waste management efforts that is often be applied, Another alternative organic waste management in the form of Microbial Fuel Cell (MFC) has emerged. Several researchers conducted studies on MFC performance which was influenced by many factors, especially the electrode which contributes to the electron transfer process. This study has a concern about energy optimization through CSMFC technology using different electrode’s material. Electrode materials from Graphene and Graphit has good electro-conductivity and has a large surface area, making it suitable for bacteria to adhere. The sampled reactors are consists of two types of electrodes in the form of graphite and graphene. Each materials has anode and cathode ratio of 1:1, 2:1, and 3:1. The samples measured into three kinds, which called a mature compost measurement, electrochemical measurement, and biochemical measurement. Some collected sampling data were then processed and analyzed statistically using SPSS software. The processed and analyzed data included the calculation of power density, total N, C/N ratio, and moisture content. Any data like voltage (V) and electric current (I) are needed to obtain a power density. The highest average voltage, current, power and power density are produced by the N3 reactor (graphene 3:1) that is 269 x 10-3 V, 163 x 10-6 A, 56 x 10-6 Watt and 1.914 x 10-3 W / m2. There is no significant effect of variations in the type of electrode (graphite and graphene) on CSMFC performances.

Light-emitting diode tipe dual in package (LED-DIP) merupakan lampu hemat energi yang banyak digunakan oleh nelayan untuk menarik dan mengkonsentrasikan ikan. LED-DIP memerlukan tegangan dan arus listrik kecil sehingga dapat menggunakan baterai sebagai sumber energinya. Salah satu alternatif adalah baterai dengan sumber energi air laut. Tujuan penelitian ini untuk menentukan kinerja baterai air laut, mengukur laju penurunan intensitas cahaya, dan menghitung korosi yang terjadi pada elektroda baterai air laut setelah penggunaan, serta mengukur penyusutan yang terjadi pada busa isolator setelah penggunaan. Metode penelitian yang digunakan adalah uji coba laboratorium. Pengukuran tegangan (V) dan arus (mA) dilakukan bersamaan dengan pengukuran laju penurunan intensitas cahaya sebanyak 3 kali pengukuran. Pengukuran dilakukan dengan durasi 2 jam dan 12 jam. Tegangan, arus, dan laju penurunan intensitas cahaya dalam durasi 2 jam dicatat setiap 10 menit. Pada durasi 12 jam dicatat dengan interval 60 menit. Korosi elektroda baterai air laut dihitung dengan analisis foto, sedangkan penyusutan busa isolator dihitung berdasarkan ketebalan awal busa dan di akhir penelitian. Penelitian dilakukan di Laboratorium Flum Tank, IPB. Hasil penelitian menunjukkan baterai air laut menghasilkan energi listrik yang menghidupkan lampu LED-DIP hijau 5 mm selama 12 jam dengan voltase terendah sebesar 2.525 V/130 mA, laju penurunan intensitas cahaya LED-DIP lebih besar dibandingkan laju penurunan tegangan dan arus. Berdasarkan pengukuran, baterai air laut dapat digunakan sebagai energi alternatif yang ramah lingkungan sebagai sumber energi LED-DIP sebagai lampu pemikat ikan pada perikanan bagan tancap.

Fever is a condition where the body temperature rises above normal or more than 37 o C and also tend to be an initial clinical manifestation of the use of antipyretic drugs that cause toxicity such as on the liver due to prolonged usage . Particularly, the b angle ( Zingiber purpureum Roxb.) is one of the Zingiberaceae plants that contain essential oils used for the treatment of fever. Therefore, this research aimed to identify active compounds which have antipyretics potential with the in silico approach. The simulation of molecular docking showed 1,4-naphthalenedione-2-ethyl-3-hydroxy was able to attach to the binding site of cyclooxygenase-2 (COX-2) and interact with main residues that constituted the active cavity of COX-2. While the simulation of molecular dynamics suggested that the bound compound was stable at 4 ns, that is the time taken. The binding free energies expected by the MM-PBSA method indicated the 1,4-naphthalenedione-2-ethyl-3-hydroxy had a higher affinity than a native ligand (2-[(2,6-dichloro-3-methyl-phenyl)-amino] benzoic acid, JMS) and paracetamol. This suggested its capacity for advancing as a new COX-2 inhibitor.

This final project makes a device that produces electrical energy by utilizing waste heat from injection machines. The waste heat of the injection machine is converted into electrical energy using a thermoelectric. This device consists of an aluminum heatsink, aluminum plate, thermoelectric, MDF wood planks, engine gasket, and thermal paste. The heat generated by the injection machine is received by the hot side heatsink, then 4 units of the thermoelectric and the cold side heatsink. Thermoelectrics are arranged in series. The output from the thermoelectric is connected to a multimeter to test the amount of voltage and current generated. The number of thermoelectric-based equipment made of 2 (two) pieces and assembled in series. The test was carried out using an open circuit and a closed circuit with a load using a 1 watt LED lamp (Ω 55 Ω). The open circuit test results show that the largest voltage is generated at 10.80 volts with a hot side temperature of 108C and a cold side temperature of 64˚C. The results of the closed circuit test show that the greatest voltage produced is 2.64 volts with a hot side temperature of 108 C and a cold side temperature of 62 C. When thermoelectric based equipment is given a load, the voltage decreases because the voltage is divided into the given load. This equipment can be applied to turn on as many as 5 lamps with a power of 1 watt each which supports production activities in the injection workshop.

This study aims to reveal the impact of distance learning during the Covid-19 pandemic on Science Technology Engineering and Math (STEM) competence, productivity, and students' character. This research uses mixed methods. The questionnaire instrument consists of STEM components, Learning Products, and character profiles obtained from Elementary School/Madrasah Ibtidaiyah, Junior High Schools, and Senior High Schools in Jakarta and Bandung. Furthermore, the data were analyzed, and it was concluded that the performance of all the variables studied had varying degrees. Besides, STEM literacy skills are closely related to learning productivity and character building of students at all levels of education. Therefore, distance learning after the Covid-19 pandemic needs to be planned well and considers the level of STEM literacy and character content clarity.

Nowadays , most students are familiar with the notebook for daily use. The compactness and flexibility of the notebook offer more benefits than a PC. The teachers can engage it during teaching physics. Hence, th is research had developed an electrical circuit virtual experiment that acts like real experiments . It can be accessed easily by students in their notebook. This study introduces a flash-based animation C ircuit B uilder as a simulation designed to help students understand the electrical circuit. This study's purposes were: (1) to analyze the feasibility level of Circuit Builder for enhancing students’ electrical circuit mastery and (2) to know the effectiveness of Circuit Builder based on students’ electrical circuit mastery. Circuit Builder was developed by 4D (Define, Design, Develop, and Disseminate) model. The feasibility level was analyzed by CVI (Content Validity Index). Then, the effectiveness was tested with effect size . This study proved that the virtual laboratory "Circuit Builder” was feasible in physics class with a moderate effect size. The virtual laboratory could improve students’ electrical circuit mastery than doing practices with traditional laboratories .

North Sumatra Province requires the provision of quality seeds to meet the demand for import. The research objective is to analyze positive laws, technical requirements mechanisms, licensing constraints for importation of seeds from abroad in North Sumatra. Using empirical juridical research methods, with a qualitative approach. Enforcement or implementation of normative legal provisions in action on legal events that occur. Conducted interviews with the staff of the Class II Medan Agricultural Quarantine Center. The conclusion is that the import of seeds is specifically regulated in Law Number 21 of 2019 concerning Animal, Fish and Plant Quarantine. Government Regulation Number 82 of 2000, Regulation of the Minister of Agriculture Number 15 of 2017 concerning Importation and Exportation of Horticultural Seeds and Regulation of the Minister of Agriculture Number 127 of 2014 concerning Importation and Exportation of Plant Seeds. Obtaining a permit from the Minister of Agriculture accompanied by a certificate from the country of origin states that the seeds are free from plant-disturbing organisms, namely HpHK, HPIK, or OPTK. The officers can control the seeds that contain plant pests in plant media in North Sumatra by conducting intensive supervision at the entry point as an effort to protect against harm to humans, including damaging the preservation of natural resources.

Coinfection between syphilis and Human Immunodeficiency Virus (HIV) could have varied clinical manifestations. Overlapping of syphilis stages is accounted for 25% of cases, attributable to the defect of the cellular and humoral immune response. We reported 55 years old man who was sexually active since 25 years ago via genito-genital, genito-anal, genito-oral routes, had multiple sexual partners both male and female, seldom used condom, and always being the insertive. Dermatological examination revealed alopecia non-scarring, a painless solitary ulcer on the collum penis, also multiple erythematous macules, patches, and plaques all over the body. Spirochaeta sp. was found from the base of the ulcer with a darkfield microscope. Histopathology examination revealed secondary syphilis lesion. Venereal Disease Research Laboratory (VDRL) 1:16, Treponema Pallidum Haemagglutination test (TPHA) reactive, HIV Determine rapid test reactive, and CD4 (Cluster of Differentiation 4) T-cell count 111 cells/ µL. He was treated with a single dose of benzathine penicillin G 2,4 million units intramuscular and antiretroviral drugs. On sixth month evaluation, VDRL was non-reactive, and CD4 T-cell count 325 cells/µL. This case shows that overlapping clinical manifestations of primary and secondary syphilis on HIV patients could occur with a good general condition. Immediate treatment of antibiotics for syphilis and antiretroviral could improve the clinical and serological conditions.Keyword: primary syphilis, secondary syphilis, HIVCorrespondence: nurul.laili.nahlia@gmail.com

The generator is the primary component in electricity generation and requires a protection system from internal and external interference that occurs. This study considers how to improve the performance of relays in power plants. A model of a generator that is executed in a fault condition to reset the protective equipment, namely Reverse Power Relay (RPR). The study is intended to model the state of internal and external fault on the generator by applying a working principle of RPR. The model is designed to anticipate the actual fault in the generator. The simulation results obtained output such as; active power, current and time delay relay. The RPR reset of the generator system is applied to the generator in Riau Power. The RPR is installed on the generator is -612 kW, equivalent to 30%, the relay delay time is 0.2 seconds. Based on standardization, the return of power reaches a maximum of -12.66 MW, which is captured 50% with a maximum replacement of 30 seconds. Results of the RPR simulation have been validated with the IEEE standard at a time delay that corresponds to the percentage of reverse power settings installed at 6% and a time delay of 0.6%. Finally, to maximize the protection system on the generator, adjust 50% to 95% of the installed settings. It can be said that the system is able to increase generator protection and minimize the impact of internal or external fault.

It turned out that the cause of pneumonia cases that occurred in China was due to SARS-CoV-2. The aim is to compare chest computer tomography and Revers-Transcriptase Polymerase Chain Reaction methods used in the diagnosis of COVID-19 disease with each other and to evaluate this disease with risk factors. The study was carried out on 66 patients. Epidemiological history, clinical symptoms, chest CT and RT-PCR results of the cases were examined. RT-PCR results of 1, 4, and 7 days were evaluated for each case with positive chest CT results. Thirty-seven of them were found to be positive on day 1, 5 of them were found to be positive on day 4, and 2 of them were found to be positive on day seven from 52 patients whose RT-PCR results were examined. In the remaining 8 cases, no positive findings were found. The most common findings are; cough (78.8%), fever (55.8%), and shortness of breath (28.8%). It was observed that 51.9% of the cases had chronic disease history and 50% of the patients using cigarettes had bilateral lung involvement in their CT results. Seven cases received intensive care support, 3 cases were intubated. Two of the intubated cases were exitus (3,8%). The positive results of RT-PCR were found to be negative in most of the cases which have positive chest CT; suggests that chest CT is more reliable in making a diagnosis. Therefore, evaluating chest CT results with RT-PCR can be an appropriate alternative approach in the diagnosis and treatment of disease. However, in order to be fully diagnosed, the patient's history, chronic diseases, age, symptoms, imaging, blood, and test findings must all be considered as a whole.

According to energy observers from the Institute for Essential Services Reform (IESR) the number of electricity consumers in Indonesia has increased by an average of 6-7% annually followed by an increase in the area of its services. An increasingly broad network is directly proportional to the potential for interference with the transmission and distribution system. The 150 KV Rembang substations is part of the Java-Bali Interconnection electrical system in northern Central Java that supplies electricity to the Rembang and surrounding areas. Rembang 150 KV substation on May 24, 2019, RBG 01 feeder experienced a disturbance behind the RB1-32 recloser and it was recorded that in 2019 PMT it had been tripped 4 times. Besides, there has been a change in equipment in the form of transformer II. These problems indicate the potential for interference that is not anticipated by the protection system, namely Over Current Relay and recloser. This study evaluates the setting of an outgoing 20 KV OCR protections and recloser on transformer II RBG 01 feeder Rembang 150 KV substation. The scenarios used are calculations with large variations of short-circuit current based on% distance, as well as the calculation of OCR and recloser settings with IEC 60255 standards. Setting currents in the protection equipment is regulated based on current conductivity (KHA) and load current on the recloser. The coordination of the protection settings resulting from this resetting will be compared to the conditions on the ground. Existing (field) OCR outgoing feeder RBG 01 condition TMS OCR value = 0.228 seconds, Iset = 480 A, and t op = 0.3 seconds. The existing OCR recloser condition TMS OCR value = 0.120 seconds and Iset = 400 A. The results of OCR coordinating outgoing feeder RBG 01 obtained TMS OCR value = 0.135 seconds, Iset = 585 A, and t operation = 0.3 seconds. OCR recloser resetting conditions obtained TMS OCR value = 0.10 seconds, Iset = 240 A and t operation = 0.198 seconds. The resetting conditions have met the IEC 60255 standard because recloser working time is smaller than outgoing work time.

DHF vector control still uses chemicals. Long-term application can lead to target insect resistance and environmental pollution so that a better alternative is to use biological insecticides because it is environmentally friendly. The aim of the study is to identify the effect of kaffir lime peel essential oil on the behavior and mortality of Ae.aegypti larvae. The research method used was completely randomized design of three treatments and three replications. The results show that larval behavior after administration of kaffir lime peel essential oil at a concentration of 103 ppm decreased the frequency of movement, the larvae were unable to rise to the surface of the water after 1.5 hours. The results of the research were tested with probit analysis at a confidence level of 95% LD 263,552 ppm. The analysis result in one-way ANOVA for the number of differences in the number of dead larvaes, with the value obtained sig. = 0.000, which means that there is a significant influence on differences in doses of papaya seeds powder solution used against the death of Ae. aegypti larvaes. Kaffir lime peel contains essential oils that can be used as biological insecticides in DHF vector control.

We propose the applying of the problem-posing learning model to find out the activities and student learning outcomes in learning algorithm and flowchart material in the basic programming class. This research is a preliminary study that will be used to develop applications/systems/interactive media/games that will support the operation of the problem-posing learning model automatically in the upcoming basic programming class. The classroom action research method was used with the implementation of two cycles involving 38 students in the first semester of vocational high school. The process of applying the problem-posing learning model uses the pre-solution posing type, which requires that each student make a question of the situation that is held, where students are expected to be able to make questions related to questions previously made by the teacher, then exchange the questions to other students to solve them. The flow of making and solving questions is that students make the main case which then completes it in the form of algorithmic answers and also a flowchart assisted by the Raptor application. By applying the problem-posing learning model, it can be concluded that in cycle 1 and cycle 2 the achievement of learning activities and outcomes tends to be good. The success of this research can provide perspective and guidance for developing basic programming applications/systems/interactive media/games that will instill the problem-posing learning model in the interaction flow and can introduce students early on the problem-posing process.

In the manufacturing industry, the integration of different types of material is needed. The dissimilar metal welding of two different material were required suitable filler types. The often combination of material was done is welding between steel and stainless steel. TIG (Tungsten Inert Gas) welding process used feed electrode an electric arc. The gas around welding area has been protected the molten metal with outside air. This study aimed to determine the effect of selecting a suitable filler on the joining dissimilar metal beetwen SS316L and low carbon steel with the TIG welding method. The mechanical characteristics of ER316L and ER70S filler variations were testing by Tensile strength and microhardness vickers. The highest tensile strength and hardness value were found in the specimen welded by ER70S filler at 410 MPa and 398,1 HVN (Hardness Vickers Number). According to the study results, the ER70S filler is more suitable beetwen welding on the stainless steel and low carbon steel.

District of West Padang which is the area closest to the coast and has a high population. Therefore a geographic information system was created using the A-Star Algorithm method. The A-Star algorithm uses the closest distance estimation to reach a goal and has a heuristic value that is used as a basis for consideration. In this system there are alternative paths and show the amount of capacity and distance from the shelter to be addressed., Kawasan Purus Kota Padang yang merupakan daerah terdekat dengan pantai dan memiliki jumlah penduduk yang tinggi. Oleh karena itu dibuatlah sebuah sistem informasi geografis dengan menggunakan metode Algoritma A-Star. Algoritma A-Star menggunakan estimasi jarak terdekat untuk mencapai tujuan (goal) dan memiliki nilai heuristik yang digunakan sebagai dasar pertimbangan. Pada sistem ini terdapat jalur alternatif dan menunjukkan jumlah daya tampung serta jarak dari shelter yang akan dituju.

Introduction: A portable fire extinguisher is one of the effective and active fire protection tool equipment used to extinguish fires at the beginning of a fire. The occurrence of a fire does not immediately become a big fire but it is starts from a small fire. This small fire is perfectly extinguished by using a portable fire extinguisher. Installation and maintenance of a portable fire extinguisher is one of the systems for fire prevention. However, it is important to know that a good and effective implementation must be balanced with proper installation and maintenance in accordance with existing regulations so that later it can function properly. This study aims to evaluate the application of the installation and maintenance of portable fire extinguishers at PT Y Indonesia. Methods: This research used descriptive research method with cross sectional approach. The data were obtained by observation using observation sheets and measurements directly in the field using a meter. Results: PT Y Indonesia has a policy regarding the installation and maintenance of APAR but its application has not fully met the requirements except for the color, pressure and distance between APAR. Conclusion: The implementation of APAR installation at PT Y Indonesia has not been in accordance with the relevant regulations except for APAR color, and the distance between APAR and implementation of maintenance is only done once a month without conducting detailed inspection with a period of 6 months and 12 months.Keywords: installation, maintenance, portable fire extinguisher

Hypercholesterolemia is a disease that is indicated by the increasing level of cholesterol in the body and also as one of the factors causing cardiovascular disease. An alternative that can be done to prevent hypercholesterolemia is by consuming fermented milk. Skim milk is fermented using probiotic of Lactobacillus acidophillus, Lactobacillus plantarum and Streptococcus thermophilus. The skimmed milk that has been fermented is then tested for total lactic acid bacteria, total acid, pH, and in vivo analysis for antihypercholesterolemia activity using animal model. In this study, the animal models used were male white rats which were grouped into three treatment groups, namely negative control, positive control, and fermented milk group. The result of the study shows that the total lactic acid bacteria, total acid and pH of fermented skim milk were 5.25 x10 9 CFU/ml ; 2.190% and pH 4.06, respectively. From the results, fermented milk with probiotics has the ability to reduce cholesterol levels in the blood of male white rats effectively in vivo.

Background : As one of important markers of cardiovascular complication in patients with type 2 diabetes mellitus, low density lipoprotein (LDL) shall be maintained to be in normal range. Based on previous research, consumption of probiotic yogurt contains Lactobacillus acidophilus and Bifidobacterium animalis subsp. Lactis is presumed can improve LDL in patients with type 2 diabetes mellitus but the scientific evidence is still few. Objectives : To investigate the effect of probiotic yogurt on LDL in patients with type 2 diabetes. Methods : This study was double blinded randomized controlled trial which was conducted on 32 patientss with type 2 diabetes mellitus. Subjects were divided randomly into 2 groups and given 4 weeks intervention. Subjects in control group were given conventional yogurt while subjects in intervention group were given probiotic yogurt contains L. acidophilus LA5 and B. animalis subsp. Lactis Bb12. Food intake data was collected 4 times using 24-hour recall method during intervention period . LDL of subjects was measured before and after intervention. Results : There was no significant difference between LDL before and after intervention in control group (128 – 148.5 mg/dL) and intervention group ( 130 – 120 .5 mg/dL ). Meanwhile, LDL after intervention in control group and intervention group were significantly different (p

Background : Generally, patients with type 2 diabetes mellitus (T2D) have dy s biosis condition. Dy s biosis can increase oxidative stress that leads to hyperglycemia. Previous researches showed that yogurt consumption can reduce blood glucose in T2D, so it can be used as an alternative healthy snack for T2D patients. Objectives : To investigate the effects of probiotic and conventional yogurt with dosage 100ml/day on fasting blood glucose (FBG) in T2D patients Methods : Randomized controlled trial, double blind with pre-post group design. The 30 T2D patients from 3 publics health centre in Yogyakarta, were assigned to two groups. Each group, either control or intervention group, received 100 ml/d of yogurt for 4 weeks. FBG samples was assessed before and after intervention period Results : FBG significantly decreased in both group, which was -27 mg/dL in control group (p

Distribution transformers are a vital component of electrical power transmission and distribution system. Frequent Monitoring transformers faults before it occurs can help prevent transformer faults which are expensive to repair and result in a loss of energy and services. The present method of the routine manual check of transformer parameters by the electricity board has proven to be less effective. This research aims to develop a low-cost protection system for the distribution transformer making it safer with improved reliability of service to the users. Therefore, this research work investigated transformer fault types and developed a microcontroller-based system for transformer fault detection and protection system using GSM (the Global System of Mobile Communication) technology for fault reporting. The developed prototype system was tested using voltage, current and temperature, which gave a threshold voltage higher than 220 volts to be overvoltage, a load higher than 200 watts to be overload and temperature greater than 39 degrees Celsius to be over temperature was measured. From the results, there was timely detection of transformer faults of the system, the transformer protection circuits were fully functional, and fault reporting was achieved using the GSM device. Overall, 99% accuracy was achieved. The system can thus be recommended for use by the Electricity Distribution Companies to protect distribution transformers for optimal performance, as the developed system makes the transformers more robust, and intelligent. Hence, a real-time distribution transformer fault monitoring and prevention system is achieved and the cost of transformer maintenance is reduced to an extent.

Internet and industrial revolution 4.0 brought influence in society, especially in agriculture, the changes that occurred were in farming activities by applying appropriate technology. This activity is much in demand, especially the planting irrigation process. However, the process of irrigation or irrigation that has used appropriate technology still has some shortcomings such as pumping and control hardware systems that are still stand-alone using a timer, so the automation and monitoring process is still semi-manual. As done in the cultivation of janggelan (black grass jelly), which focuses more on irrigation governance, because the janggelan requires water intake and fertilizer nutrition which is always monitored. In order for the device to function optimally, it is made a miniature tool based on the internet of things to facilitate control and monitoring via a smartphone. In order for the miniature tool can be integrated and function in real-time with the Internet of things, then all devices (YL 69 sensors, Relay, Board NodeMCU esp 8266 are given C language coding commands, via the Arduino ID interface. synchronization between the user interface, the miniature devices, and Internet networks running normally. IoT devices and internet networks can run normally. Sensor data is able to give the pump selenoid command to turn on under humidity conditions of less than 65%, while the pump is off at 40% humidity. The success rate of data sent on Google Firebase with an average total ping of 70.28% was all successful .

Various technologies have been developed to reduce heavy metal content in the wastewater. The biosorption method is a technique that is widely applied because it is cheap, environmentally friendly, and has high efficiency. This study aims to ascertain the potential of dry biomass of microalgae Aphanothece sp. as a biosorbent of Cu (II) ions in synthetic wastewater and determine the appropriate biosorption kinetics model. Analysis of Cu (II) ion concentrations was carried out using Atomic Absorption Spectrophotometer (AAS). The results showed that the optimum conditions for the biosorption process were at pH 4, and the contact time was 210 minutes with the removal efficiency of Cu (II) ions reaching 80.02%. The results of tests on the adsorption isotherm model showed that the biosorption process of Cu (II) ions using dry biomass biosorbent Aphanothece sp. follows the Freundlich isotherm model with an R2 value of 0.9962.