bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of railway signaling system using IR sensor as train detection
Authors: Sugiana A , Wibowo A S , Waqash S N , Rusdinar A
Published: March 2021

In this research would try to give contribution for researchers or academics about simulation of the railway signaling system. The model of railway system was built using miniature of track and train model. Small LED was used as a lamp signal. Point machine was moved by servo motor controlled by Arduino Nano. The last, track circuit was replaced by proximity sensor using IR transceiver. The result showed that the simulation could do some basic task which is occurred in railway signaling system. The design of system was created by FSM (Finite State Machine) method which would be implemented in PLC (Programmable Logic Controller). It consists of state diagram, declaration of inputs and outputs, generated logic equation, and finally is the written code in ladder logic diagram. Set route test also has been tried successfully and the lamp signal showed the color aspect correctly.
The reliability study of Gili Trawangan photovoltaic system using RBD (Reliability Block Diagram) method
Authors: Syamsuddin A
Published: March 2021

In order for Gili Trawangan On-grid photovoltaic (PV) system to be reliable in supplying electricity, it is necessary to know the reliability of the main equipment in the PV system. The aim of this study is to determine the reliability of the main equipment of the on-grid PV system. The methodology is, collecting primary data in the form of disturbance data reports on Gili Trawangan PV system in 2011-2018, compiling the Reliability Block Diagram (RBD) of the PV system and determining the reliability and critical of the PV system equipment using Reliasoft Blocksim software version 11. The On-grid PV systems Reliability Block Diagram consists of 3 sub-systems; Source system, String Combiner System and Power Conditioning System, each of which is composed of main components. RBD simulation results with Reliasoft Blocksim software obtained the results that the reliability of the On-grid PV system is 49% at t=100 hours and 40% at t=300 hours, this condition is still far from the target of PV system reliability of 80%. From the simulation also obtained critical equipment on the On-grid PV system is an AC Inverter and Breaker component, which has a high Reliability Importance (RI) value and with the highest reliability value.
An implementation of virtual office information system services in basic telecommunication technique practices
Authors: Bonok Z , Asmara B P , Abdussamad S
Published: March 2021

Information and communication technology has improved rapidly, but this technology is still underutilized in the world of education in Indonesia, especially virtual laboratories, with the existence of virtual laboratories the learning process becomes faster and more attractive so that the equality of learning can be done anywhere ant at any time especially with covid 19 outbreaks which swept the world, in Indonesian suddenly required to work and study online, for online lectures are often used but for practices where there are no facilities available for virtual laboratories, this research was conducted to design and plan using virtual office information system services and virtual labs can be accessed at any time with more efficient use of time. This research was carried out in the electrical engineering laboratory of Gorontalo State University. The method used in this research is to study literature and develop PHP programming software and AJAX programming technology and Cloud meeting zoom technology or vicon.ung.ac.id. The research tool is using tools in the form of laptop hardware or personal computer and software in the form of object-oriented programming language PHP and AJAX programming technology. The research results showed that the virtual office can process the implementation of office work in the laboratory with the work system being the target of work for laboratory managers, and students who are practicing Basic Telecommunications Engineering from the results of the Urgency Implementation of Virtual Office Information System Services in Basic Telecommunications Engineering practice, Electrical engineering laboratories can be used quickly and easily if supported by adequate network infrastructure. Digital telecommunications applications, conducting office / laboratory administration and practices activities can still be implemented with the presence of virtual office system services office / laboratory activities related to information services can be done with time efficiency, place efficiency, saving costs, Reducing barriers to a pandemic like this year 2020 with covid 19, so that the Basic Telecommunications Engineering Practicum will continue, can save operational costs when pandemics like covid 19.
Analysis of the implementation of three-phase Variable Frequency Drive on the prototype of a rice drying machine
Authors: Eriyadi M , Ajimah A , Usman D , Hamdani Y M , Abadi S C , Suryadi A
Published: March 2021

The prototype of the rice drying machine is a device used for rice dryers that are not weather dependent. The driver of this prototype rice drying machine uses ½ HP induction motor as its main mover. To be able to adjust the rotation of the induction motor using Variable Frequency Drive (VFD) brand LS iC5 with 1 HP power. The rotation needed to rotate the load can be done by changing the frequency and voltage so that the rotation speed of the induction motor can be adjusted as needed. From the testing of a no-load induction motor with a frequency adjustment range from 5 Hz to 13 Hz, the induction motor speed is 142.8 rpm (rotation per minute) to 375.3 rpm. The measured voltage is 76.5 V to 116.7 V and the measured current is 2.5 A to 1.6 A. From the results of the test of a no-load induction motor it can be concluded that the ratio of frequency to voltage is directly proportional while the ratio of frequency to current is inversely proportional. In testing induction motors with a frequency adjustment range from 5 Hz to 9 Hz, they produce the same conclusions as to the induction motor load testing. VFD is certainly appropriate to be used as a speed regulator as needed.
Analysis of impact installation of Distributed Generation in a 20 kV distribution system
Authors: Aisyah G S N , Mulyadi Y , Hasbullah H
Published: March 2021

This study aims to determine the effect of the installation of Distributed Generation (DG) on the value of voltage drop and real power losses in the distribution network of 20 kV Gunung Dukuh feeder (GNDH). In addition, this study also aims to determine the optimal distribution location of Distributed Generation (DG) to get the best voltage drop and power losses. The background of this research is that the voltage drops and power losses are common in GNDH feeders at PT. PLN (Persero) Cimahi area. The voltage value on the GNDH feeder is sometimes still below the standards set by PLN. This will certainly cause the load not to work optimally and can even cause damage to the electricity load and in the end will be very detrimental to all parties, both the electricity consumer and PT. PLN (Persero). Based on the characteristics of DG directly connected to the distribution system, there is no need for a transmission system to deliver electricity. This is certainly very influential on the decrease in the voltage drop and the value of power losses. The method used in this research is power flow simulation using ETAP 16.0.0 software and analysis after getting simulation results. The findings of this study are the simulation results prove that the installation of DG affects the decrease in voltage drop and power losses in GNDH feeder, before installation of DG the voltage drop in GNDH is 10.1% and the value of power losses before DG installation is amounted to 446.5 kW. After the DG installation simulation, the optimal installation of two DGs is found on the TM 36 bus and the TM 42 bus with a decrease in the voltage drop to 1.18% and a power loss value to 117.2 kW.
Inverter design at photovoltaic for distributed generation networks
Authors: Mustagisin I , Mulyadi Y , Hakim D L
Published: March 2021

The photovoltaic generator is a renewable energy generator and this generator can be used as a DG because it is an environmentally friendly generator and can be stored close to the load because it does not cause pollution to consumers who are near the plant. Photovoltaic generator requires an inverter to convert the voltage generated by PV (DC voltage) to the voltage needed by the grid (AC voltage). In this study, the data obtained is the planning of DG installation in Karimunjawa. However, there is no harmonics calculation in the network. So that requires the design of an inverter in order to analyses the harmonic generated and the effect of harmonics on the grid. Not only inverters, this generator also needs a boost converter because the voltage generated by PV is insufficient to convert into a 400 Volt AC voltage. The inverter will use the PWM technique which will convert the DC voltage to AC and use an LC filter to refine and reduce the harmonic generated by the inverter. Simulation in this research is to found value of the component in LC filter and Boost Converter. After that the circuit will connect to the grid for analysis harmonic on the load.
IoT based sorting system of consumer goods production
Authors: Syufrijal S , Rif’an M , Prabumenang A W R , Wicaksono R , Maqfiroh A A , Ilhami R F
Published: March 2021

Most industries use the manual sorting process to sort consumer goods production. The problem of manual sorting is taking a long time to complete the work. The industry should be demanded to be faster and more efficient in meeting consumer needs. The purpose of this research is to make a tool that can sort goods automatically into the warehouse using RFID technology by combining Arduino and PLC as the controller. The number of items that have been sorted can be monitored remotely by using the Internet of Things (IoT). By identifying the items using RFID makes work more concise and efficient. This research uses an experimental method. The automatic sorting system uses an RFID reader to read ID cards that have been installed on the goods side. The ID cards are processed into Modbus data to be sent to the PLC Siemens S7-1200 via Ethernet Shield that is connected to the Arduino Mega 2560. The PLC will select items to be placed on each conveyor. The results of this study showed that the system can work automatically in the sorting of consumer goods and can monitor the process of its work system on the GOIOT platform via the internet network.
Web-based intravenous fluid monitoring
Authors: Majid S H , Yusro M , Yuliatmojo P , Siregar K N
Published: March 2021

Hospitals and community health centers in Indonesia still use conventional infusion devices to treat patients. Technological developments have made many medical devices automatically controlled. This study aimed to provide a web-based intravenous fluid monitoring using NodeMCU. The sensor consisted of a load cell sensor as a reader for the remaining infusion fluid, an optocoupler sensor as a blood detector, and a photodiode sensor to read the number of drops. In the event of dangerous situations such as an intravenous fluid running out, blood entering the intravenous line or the liquid is not dripping, the tool will give a warning through status LED, buzzer sound, and warning sounds on the web. This system has an error value of 3.12% for mass readings, 6.47% errors for droplet readings and 0% errors for blood detection. This system works by utilizing a Wi-Fi internet network. This system is expected to enable nurses, doctors, and patient’s families to monitor a patient’s intravenous fluids in real-time conditions.
Development of a tool for determining the authenticity of signature using the raspberry pi board
Authors: Rohan D H , Yusro M , Djatmiko W
Published: March 2021

Determining the authenticity of signatures is an important task in office / company administration because there are many cases of counterfeiting. The purpose of this study is to develop a tool for determine the authenticity of signature based. The device consists of three main parts, namely a camera module for reading signature images, a raspberry pi board for processing signature images; and an LCD module for displaying the results of signature authenticity detection. This study proposes a simple algorithm using the binary image method and canny edge detection to change images and compare pixel values between reference signature images and doubtful signature images. This process is done by comparing pixels with the same position from different signature images. The comparison results will base for the tool to determine the authenticity of signatures. The result is displayed on the LCD screen with the name of the owner of the signature obtained from the tool database. This system can store five signatures that serve as reference signatures and has six possible final decisions in determining the authenticity of signatures. The results showed that the system can determine the authenticity of signatures with a success rate of 82% from testing of ten different signature images.
The making of Android-based search engine applications with Elastic-search algorithm to improve programming competence
Authors: Sulistiyo E , Wibawa S C , Sujatmiko B , Nugroho I D
Published: March 2021

This research aims to create an Android-based search engine application using the Elastic-search algorithm which can later be used for students learning object-oriented programming. This media contains a search for material that makes it easy to learn and do assignments. The method used in developing this application is 4D from Thiagarajan and using Java language programming. The results of this study indicate that this application is valid for use in terms of Quality of visual and auditory perception, Ease of interaction and collaboration, Ease of learning to operate, Ease of use. It can be concluded that the Search engine application with Elastic Search algorithm is declared valid to be used as learning for students who want to learn about programming.
Web-based character-building model for managing school in Jakarta
Authors: Ibrahim N , Marini A , Safitri D , Rosinar R , Nuraini S , Rihatno T , Putra ZE F F
Published: March 2021

The aim of this study is to develop an effective web-based character-building model for managing school in Jakarta in Indonesia. The method of Research and Development (R&D) has been conducted in this study. Development of the model of web-based character-building regarding the four aspects of integration of character values in classroom, school culture, extracurricular activities, and through community involvement. The product of this research is available at URL: https://pembangunankarakter.wixsite.com/characterbuilding. Expert validation, limited, and extensive field test result arrived at 3.65, 3.89, and 3.68 from scores ranging 1 to 4 indicating that this product was valid, practical, and effective model. Consequently, it can be stated that web-based character-building model for managing school in Jakarta in Indonesia has been effective to improve the student positive characters. In this sense, it is recommended that the model developed in the scope of the study applied for school management in Jakarta can also be implemented for managing school in other cities in Indonesia.
Science, Technology, Engineering, and Mathematics learning models to establish the clean and healthy living behaviors
Authors: Fathin M Q
Published: March 2021

This study aims to explain the impact of the learning models of STEM (Science, Technology, Engineering, and Mathematics) on the formation of clean and healthy living behaviors in Pesantren (Islamic Boarding School). The methodology used in this study is a qualitative analysis using the causal-effectual analysis to evaluate the logical relationship between observed variables. The object of this research is the students at the MBI (Madrasah Bertaraf Internasional – Madrasa/Islamic School with International Standard) Amanatul Ummah Mojokerto, Indonesia. The results of the study show an increase in knowledge as a product of STEM education can improve student character. Changes in student behavior can observe it after obtaining STEM learning, which tends to have an increase in caring and actions that support clean and healthy living behavior. The implication of this research is necessary to instill logical and systemic knowledge to improve the character of students in carrying out clean and healthy life behaviors, one of which can go through the STEM learning model.
The adsorption of hg2+ ions from the illegal gold mining wastewater using fly ash from palm shells
Authors: Badariah B , Rainiyati R , Heraningsih S F
Published: March 2021

Mercury has a significant negative effect on the health of humans and living things, and is a dangerous element that is widely known. Mercury is commonly found in gold mining wastewater. One way to remove mercury from waste water is to use the adsorption process. One of the adsorbents used in the absorption of mercury is palm shell fly ash. Palm shell fly ash is solid waste from the result of burning palm shells on the boiler. The use of fly ash from palm shells as an adsorbent is preferred because it is cheap, environmentally friendly and available in large quantities. The adsorption process is carried out by contacting the adsorbent directly with waste water. Addition of adsorbents to wastewater can increase the pH of wastewater to 4 levels. The best adsorption results are indicated by the efficiency of mercury ion absorption up to 100%. The adsorption capacity of the adsorbent increases with increasing time of stirring the adsorbent in wastewater.
Size distribution, length-weight relationship and condition factor of three species male fiddler crab from jaboy mangrove wetland, Sabang, Indonesia
Authors: Zulfahmi I , Marlinda R , Nisa C , Paujiah E , Irfannur I , Rinaldi R , Purnama N R , Mandasari M
Published: March 2021

The size distribution, length-weight relationship and factor condition of three species male fiddler crab (Tubuca dussumieri, Gelasimus vocans and Austruca perplexa) from jaboy mangrove wetland, Sabang, Indonesia were examined. 50 samples from each species was collected from three station using digging method and cast net. Samplings were carried out during May 2019. The carapace length (CL) and total weight (TW) was measured using a digital caliper (standard error: 0.01 mm) and digital scale (standard error: 0.01 g). Result showed that Tubuca dussumieri, Gelasimus vocans and Austruca perplexa were found in the size range of 12.37-17.19 mm, 12.03-16.46 mm, 7.79-10.39 and mm carapace length, respectively. Besides, the total weight varied from 2.09-8.20 g, 2.85-5.07 g and 1.15-2.26 g, respectively. All species of male fiddler crab showed negative allometric growth (b < 3). The highest value of b was founded in Tubuca dussumieri, while the lowest was founded in Gelasimus vocans were 2.659 and 1.299, respectively. Nevertheless, Austruca perplexa has a higher value of factor condition than Tubuca dussumieri and Gelasimus vocans.
Diversity of marine aquaculture as a strategy to protect the livelihood of small-scale and seagrass conservation on the south coastal region of Lombok Island, Indonesia
Authors: Syukur A , Idrus A A , Nasir L M I H M , Fahmi F
Published: March 2021

Small fishermen are those who have contributed to food security and social stability. The purpose of this research is to describe the development of marine culture as a complementary livelihood of small fishermen and the protection of the marine environment. The research method uses observation techniques, surveys, interviews, questionnaires and in-depth discussions. Data analysis uses descriptive statistical analysis and regression. The results of the study showed that marine culture that could be developed was baronang and cuttlefish. Both types of these seeds are available in the surrounding seagrass area. The results of the regression analysis showed that the length of cultivation had the highest R2 compared to the other two independent variables, namely education and the number of family members. Meanwhile, farmers have internal regulations to protect the environment, especially in seagrass areas. The conclusion of this research is that aquaculture can be a solution for fishermen’s livelihoods and has a strategic value from the ecological aspects for the sustainability of marine life. Therefore, marine aquaculture can be a model in a food security strategy at the local level and can contribute to regional food security.
Application of Paclobutrazol and Electrical Conductivity value of nutrient solutions to improve yield and quality Cucumis sativus L var Japanese on the hydroponic system
Authors: Sudrajat A , Frasetya B , Daniswara F G
Published: March 2021

Many factors influence the yield and quality of hydroponically cultivated Japanese cucumber plants. This study aims to study the interaction of Paclobutrazol and the Electrical Conductivity (EC) of nutrient solution to improve the yield and quality of cucumbers. The study was conducted in February 2019-April 2019 at the greenhouse of Universitas Padjadjaran, Jatinangor. The research method used was a split-plot design consisting of two factors and three replications. The first factor is the value of EC n1 = (2.0-3.2 mS cm−1), n2 = (2.0-3.4 mS cm−1) and n3 = (2.0-3.6 mS cm−1) ) and the second factor is Paclobutrazol concentration p1 = 0 ml l−1, p2 = 0.375 ml l−1 and 0.75 ml l−1. The parameters of growth and yield of plants observed were leaf area, day of flowering, number of male flowers, number of female flowers, number of fruits, fruit weight, and percentage of normal fruit shape. The observational data were then analyzed by the variance analysis of 5% significance level and continued with Duncan’s test at 5% level. The results showed there was no interaction of Paclobutrazol factors and EC of nutrient solution values. Plant growth without the application of Paclobutrazol and EC generative stage 3.2 mS cm−1 yields better crop quality and yield.
Liquid organic fertilizer and types of organic mulch toward photosynthesis translocation of green beans (Phaseolus vulgaris L.)
Authors: Roosda A A , Ramdhani T , Birnadi S
Published: March 2021

Green bean productivity is closely related to the accumulation of photosynthesis translocation. Organic base matter for fertilizer and mulch provide eco-friendly system to support plant productivity. Liquid organic fertilizer and types of organic mulch serve the optimum condition for growing environment of green beans. This study aimed to determine the concentrations of liquid organic fertilizer and types of organic mulch toward biomass addition in green beans. The experiment was conducted on Andisol soil in Cisalak, Subang West Java from January to March 2018. A factorial randomized block design was used to arrange the first factors (0 ml l−1, 1 ml l−1, 2 ml l−1, and 3 ml l−1 liquid organic fertilizer) and the second factors (without mulch, paddy straw mulch, and reeds mulch). The results obtain no interaction between liquid organic fertilizer and types of organic mulch for number pods per plant, pods weight per plant, dry stover weight, shoot root ratio and harvest index. Liquid organic fertilization in 2 ml and paddy straw mulch, independently, gave the best recommendation to increase green bean productivity.
Growth of mycelium oyster mushroom (Pleurotus ostreatus) in medium rice wastewater with coconut water
Authors: Rachmawati Y S , Akbar Z A , Chaidir L , Roosda A A
Published: March 2021

The high consumption of oyster mushroom (Pleurotus ostreatus) is constrained by the production capacity and the provision of mushroom seed with low quality. Also, the price of starter pure brood stock is expensive, a calculated Rp400.000-Rp1.000.000 per-bottle. This research aims to determine the effect of rice wastewater with coconut water on the growth of the mycelium pure brood oyster mushroom. The research was conducted in July 2019-Februari 2020 in the integrated laboratory of the Faculty of Science and Technology UIN Sunan Gunung Djati Bandung. The method used is experimental with 9 treatment of combination of rice wastewater with coconut water concentration i.e. 100%:0%, 80%:50%, 80%:20%, 50%:80%, 50%:50%, 50%:20%, 20%:80%, 20%;50%, 0%:100%, and repeated three times. The combinations concentration of 50% rice wastewater with 50% coconut water produced the best growth of colony diameter anda mycelia growth rate compared to other treatments. Therefore, the combinartion medium 50% rice wastewater with 50% coconut water can be used as a medium to multiply pure broodstocks of oyster mushrooms.
Mapping total Nitrogen in dryland North Lombok from soil spectral reflectance
Authors: Kusumo B H , Purwanto Y A , Idris M H , Bustan B , Baharudin B
Published: March 2021

Nitrogen (N) is one of the essential nutrients for plant growth, and its availability and spatial distribution in dryland need to be known for better soil and crop management. However, mapping soil N content is expensive and time consuming. The aim of this research is to test the use of soil spectral reflectance to rapidly measure and map soil total N in North Lombok dryland. About 300 soil samples, including the coordinates, were collected in Kayangan Sub-district of North Lombok, Indonesia. The samples were dried, ground, sieved (0.2 mm diameter), which then analysed for total N content using Kjeldhal method, and scanned using near infrared spectroscopy (NIRS). A calibration model was developed using partial least square regression (PLSR) from Kjeldhal-analysed N data and soil spectral data. The model was then used to predict the soil N content from the spectral data, and then soil nitrogen content was spatially mapped. The result showed that soil spectral reflectance technology was able to measure and map total N distribution in soil although the range of soil N content was from very low to medium. This shows that the technology can be used to map soil N distribution in dryland North Lombok, which may then be used for the guidance of fertiliser application.
The effect of nuclear radiation on mutation chromosomes of shallot cells (Allium cepa)
Authors: Sulianti A , Riyadhi H F , Kinasih I , Sukmabuana P
Published: March 2021

Environmental pollution by nuclear radiation has been known to endanger chromosomes. This research aims to analyze the abnormal forms of root shallot chromosomes which are irradiated by nuclear with various levels of radiation. This is a quasi-experimental research. The treatment group was given radiation through nuclear reactors at a dose of 11.88 rad, 8.69 rad, 2.01 rad, 1.28 rad, 1.15 rad, 0.26 rad, 0.00034 rad, 0.00016 rad, while the control group was without radiation. The staining of the preparations was carried out using Acetocarmine 2%. Reading preparations using a microscope with a magnification of 400x. The results of the study showed the emergence of various forms of chromosomal abnormalities. Abnormal forms that appear are pole to pole arrangement chromosome, unequal separation, binucleate cell, pulverized ball metaphase, sticky anaphase with broken bridge, chromosome rosette, abnormal chromosome fragment, early cell plate formation at late anaphase, sticky metaphase, binucleate cell with a bridge, chromosome fragments, binucleate cells, chromosome gaps, ball anaphases with a diagonal scattered anaphase bridge, and aberrant grouping at anaphases in a giant cell. The novelty of this preliminary study is that chromosomal abnormalities in the onion roots were found even in the very low radiation group. Large-scale research is required and their effects if eaten by animals or humans need further research.
Analysis of ecology index of demospongia class (spons) in litoral zone of Cikabodasan beach of Sancang sea nature reserve Garut district
Authors: Hernawati D , Al-jawami I , Permana K R , Mulyaningsih S , Nurkamilah S
Published: March 2021

This research aims to determine the Ecological Index of Demospongia Classes (Sponges) in the Litoral Zone of Cikabodasan Beach, Sancang Sea Nature Reserve. The method used in this Research is descriptive method with quantitative approach and sampling using purposive sampling techniques assisted with line transects and quadrate transects in identifying species from the Demospongia Class. The sampling process was carried out by dividing the study site into three observation stations with a distance between stations 92 m. Each station consists of three line transects with a length of 100 m with a distance between the line transects 42 m. Each transect line is placed 10 transect squares with a size of 1x1m. Based on the results of the research, Demospongia class species were sampled as many 12 species with total of 272 individuals. The highest tecological index values were found in apply sinaaerophoba species with diversity index value of 0.3465, abundance index of 0.7556, evenness index of 0.1395, and dominance index of 0.0625. The lowest tecological index values are found in Haliclonacinerea and Plakortis sp with diversity index value of 0.00497, abundance index of 0.0333, evenness index of 0.0200, and dominance index of 0.0001 in each species.
UI Zero Plastic as an action towards sustainable campus
Authors: Wardani W K , Kholis N , Pradipta E , Lestari F , Patria M P , Priambodo R , Bowolaksono A
Published: March 2021

Plastic waste has become a globalized environmental issue. Indonesia became the second-largest producer of plastic waste after China based on a report from the World Economy Forum. Waste management and individual awareness of environmental issues are challenges for Indonesia. The more individuals who move, the more waste generation will result from these activities. University of Indonesia (UI) as an educational institution has more than 50,000 academic people/year and has diverse activities. UI produced 663,984 kg of plastic waste in 2018. UI was responsible for the production of plastic waste generated as a form of effort towards sustainable universities. Efforts to increase awareness of environmental issues by conducting socialization related to the UI Zero Plastic Program in the campus environment to leaders at UI, students, employees, canteen tenants, and during major events at UI such as UI graduation and the beginning of new student activities. Based on the socialization of the UI Zero Plastic Program that has been implemented, there has been a decrease in the generation of plastic waste from 2018 to 2019. UI Rector’s Decree regarding the UI Zero Plastic Program as a reference in the socialization and implementation of the UI Zero Plastic in the campus environment.
Analysis location of microplastics in green mussel’s Perna viridis Gills (Linnaeus, 1758)
Authors: Madeppungeng E R , Patria M P , Suryanda A
Published: March 2021

This study describes the location, type, and range of microplastic sizes found in the gills of green mussel Perna viridis. This study continues the results of Fathoniah’s research on 2017 about microplastic abundance in green mussels at Kamal Muara, North Jakarta. Sample of 3 green mussels with a size of about 7 cm was taken from Kamal Muara. Gills from both the outer and inner demi branch were isolated and made as preparations. Every part of the gills marked into posterior, anterior, proximal, and distal. After that, the gills were observed under the light optical microscope. Position and type of microplastic in the gills was recorded and measured using the LAZ EZ application. The results showed that the distal area of the gill contains more microplastic than proximal. The dominant microplastic group found in the gills of green mussels was fiber. The range of microplastic sizes found in green mussel’s gills was 20-4500 μm.
Van soest and mineral analysis of wild buffaloes feces (Bubalus bubalis L.) in Savana Baluran National Park, East Java Indonesia
Authors: Lisanti E , Wulaningsih R D , Arwin A
Published: March 2021

Climate change has affected livestock production systems through impair feed intake, metabolic activities and defense mechanisms. Furthermore, it is also caused the greatest reduction of herbage yield and increase lignifications in plant tissues and hence decrease the digestibility of forage by the animal. The research has been done in Savana Bekol, Baluran National Park, East Java. The research was conducted in June 2019. Objectives: To know Van Soest analysis of wild buffaloes feces sample, so we know the type of plant that consumed. Methods: Observations were carried out by withdrawal feces sample with purposive sampling. Observation time is carried out for 8 hours (8.00-16.00). Van Soest analysis was conducted at Laboratory of Nutrition Technology of Animal Husbandry Faculty, Bogor Agricultural University. Results: The result for Van Soest analysis were Neutral Detergent Fiber (NDF) (71.60%), hemicellulose (23.19%), Acid Detergent Fiber (ADF) (48.41%), cellulose (2.22%) and lignin (32.91%). Mineral analysis showed that feces of buffaloes consists of Nitrogen Free Extract (NFE) (32.05%), Calsium (Ca) (2.00%), Phosfor (P) (0.52%), and Natrium Chloride (NaCl) (0.10%). Conclusion: These results indicate the NDF, hemicelluloses, cellulose of wild buffaloes were lower than pet buffaloes, but ADF and lignin of wild buffaloes were higher than pet buffaloes.
Model of ecolabel in environmental conservation
Authors: Marini A , Safitri D , Yunaz H , Putra ZE F F , Nuraini S , Rihatno T , Ibrahim N
Published: March 2021

The aim of this study is to propose ecolabel model in Jakarta. This survey study distributed the questionnaires to 757 consumers in Jakarta in Indonesia using Structural Equation Modeling (SEM). The research found that model suggested was good fit for the data. The result of study shows that environmentally informative instrument, environmentally friendly label, and environmental protection were positively associated with ecotourism. providing accessible message to consumer about the environmental attributes of the product, giving the consumer knowledge about the production standards of the product, and transmitting green product messages have positive correlation with environmentally informative instrument. Indicating the products coming from environmentally friendly substances, communicating a sense of environmental consideration on the part of the manufacturer to consumer, and arousing consumer interest to purchase environmentally friendly products are positively related to environmentally friendly label. Assisting to diminish the volume and toxicity of pollutants, encouraging consumer awareness development about product impact on the environment, and driving ecologically conscious consumer behavior are predictors of environmental protection. The conclusion of this study is that ecolabel model suggested can be used in Jakarta in order to have environmental conservation.
Environmental quality model to have sustainable environment
Authors: Nuraini S , Safitri D , Marini A , Rihatno T , Budiaman B , Ibrahim N
Published: March 2021

The aim of this study is to propose environmental quality model in order to have sustainable environment. This survey study distributed the questionnaires to 375 persons of local community in Jakarta in Indonesia using Structural Equation Modeling (SEM). The research found that model suggested was good fit for the data. The study result presents that socio-economic domain have significant positive association with of environmental quality. However, the positive associations between ecological domain and meteorological domain was not confirmed in this study. The use intensity of water resources and food production have significant positive association with ecological domain. However, the relationship between waste management and ecological domain was not supported in this study. Air pollutant, water pollution, and earth temperature have significant positive connection with meteorological domain. Water shortages, human health problems, and community environmental awareness have significantly positive relationship with socio-economic domain. It can be concluded that environmental quality model hypothesized can be used for local community in Jakarta in Indonesia in order to have sustainable environment.
Effect of saline condition and application of rice husk silica extract on lettuce growth in hydroponics
Authors: Subandi M , Frasetya B , Resminiasari N
Published: March 2021

The development of hydroponic vegetable production in coastal areas is faced with the constraints of irrigation water quality that has high NaCl. The purpose of this research is to study the interaction of NaCl concentration in the planting media and the concentration of silica extract of rice husk on the growth of lettuce plants. The study was conducted in April 2019-June 2019 at the greenhouse Palasari-Cibiru Bandung city with altitude + 800 m above sea level. This study used a factorial complete randomized design consisting of 2 factors with three replications. The first factor is the concentration of NaCl (n1 = 0 ppm, n2 = 1,460 ppm, n3 = 2920 ppm, n4 = 4380 ppm, and n5 5850 ppm) and the second factor is the concentration of silica extract of rice husk (s1 = 0 ml l−1, 30 ml l−1, and 45 ml l−1). Growth parameters observed were plant height, number of leaves, leaf area, root length, and plant fresh weight. The results showed that there was an independent effect on the concentration of NaCl on fresh plant weight. In the condition of saline media with a concentration of NaCl 1,460 ppm-2,920 ppm and the concentration of silica extract of rice husk, 30 ml l-1 lettuce plants can grow in good condition.
Information hiding in images using Discrete Cosine Transform
Authors: Emmanuel G , Hungil G G , Maiga J , Santoso A J
Published: March 2021

In this era of development and increasing use of the Internet, user facing security problem during information sharing in which unauthorized receivers can gain access to the information transmitted. Data hiding during the transmission of information via the internet is one of the techniques used to keep the secrecy of the information to the unauthorized/ unintended persons. Steganography is a way of hiding secrets information by inserting it into an audio, video, image or text file without raising any suspicious to unintended persons. This paper presents the study which hides text messages into the image file by using Discrete Cosine Transform (DCT) steganography method. The method of this work by transforming the cover image and text message from spatial domain to frequency domain and use redundant bit of cover image to hide text message in such a way that unintended person will continue to see it as a normal image. The method continues to keep the quality of the cover image which transfers the information to reduce suspicion. Steganography is most used in military, law enforcement agency, corporate spies and in the medical area for hiding sensitive information.
The development of a digital video to improve Nutrition and Reproductive Health (NRH) knowledge of female adolescents
Authors: Rusilanti R , Riska N , Mahir I , Artanti G D , Febriana R
Published: March 2021

The awareness of female adolescents about nutrition and reproductive health (NRH) to prevent nutrition problems in Indonesia is very important. This study aims to develop a digital video used in the school environment and the community to improve the NRH knowledge of female adolescents. The methodology of research is R&D (Research and Development) with the ADDIE model (Analyse, Design, Develop, Implement, Evaluate). The design and development phase produced a 30 minutes digital video format that contains NRH materials. The results of these phases showed that media experts considered the appropriate value of 4.5 and a nutritionist value of 4.4. The field testing implemented the video product in 3 Vocational High Schools in DKI Jakarta and West Java Province by involving 180 female students to measure the effectiveness of the use of digital video media. The field test results in a useful digital video for improving NRH knowledge of female adolescents.
Design of subsidized fertilizer prediction information system with safety stock methodology
Authors: Setiawan R , Rahayu S , Nugraha G G S , Baswardono W , Satria E
Published: March 2021

The purpose of this research is to design a subsidized fertilizer information system equipped with a prediction system with a safety stock method. This study uses the waterfall methodology with stages of Analysis, Design, Coding, and Testing, as well as the safety stock method for prediction. By testing using black-box testing with system modeling using the Unified Modelling Language (UML) and Business Process Model and Notation (BPMN). The results of this research are a prototype of a fertilizer information system for data collection activities, fertilizer expenditure from the warehouse, and fertilizer orders based on predictions. This research takes a case study at PT. Anugerah Ihsan Makmur, which is a company engaged in the distribution of subsidized fertilizers in the Garut region. This information system can help record the distribution of fertilizer, determine the amount of fertilizer procurement that must be ordered to suppliers to meet inventory needs so that there are no shortages, and can use as a management report on the distribution of subsidized fertilizers to the government.
The proposed guest verification information system design for the residential complexes
Authors: Heryanto D , Fatimah D D S , Supriatna A D , Setiawan R
Published: March 2021

This study discusses the proposed information system design on how to verify guests in a housing complex that is quite dense and numerous, making it easier for environmental security officers to find and match guests and residents of the intended house. The purpose of this research is not only to improve the safety of the environment but also to find out the correct information from guests by verifying guest’s names to homeowners through a system designed. The method used in this study is the System Development Life Cycle (SDLC), which is a pattern for developing software systems consisting of the planning, analysis, design, implementation, testing, and management phases that form a workflow for planning and controlling design information Systems. The results of this study are prototype applications for guest verification in improving environmental safety in residential complexes.
Knowledge based information system for detecting early eye diseases
Authors: Sumarno S , Rosid M A , Irawan A
Published: March 2021

The eyes are very important senses in human life. If the eyes experience interference, it will be fatal to human life. Although each type of eye disease has its own specific characteristics and symptoms, early detection with a deeper recognition of eye disease symptoms should be done. Knowledge-based information systems are systems that attempt to convert human knowledge into computers so that computers can solve problems as is usually done by experts. produce conclusions or goals. The aim of this study is to design applications for early detection of fourteen types of eye diseases. This detection uses a knowledge-based system that uses the Forward Chaining method. This study produced an output in the form of the possibility of the disease the user suffered based on fifty-three selected symptoms. This system indicates how much confidence the user has in the symptoms of possible eye diseases.
Early warning model for financial distress using Artificial Neural Network
Authors: Alamsyah A , Kristanti N , Kristanti F T
Published: March 2021

Financial investment has become a trend in Indonesia with significant increase of active investors since 2015. Before making an investment, the investors need a comprehensive analysis to reduce the chances of failure that result in financial distress, the same apply towards companies in order to organize its financial strategies. Financial distress indicated by losing its value, ineffective production, cash flow problems or high financial leverage value. These conditions threaten the companies and the investors who face significant financial loss. The purpose of this research is to construct early warning model of financial distress, by examining the phenomenon of 90 companies in Indonesia, from 2015 to 2018 listed on Indonesia Stock Exchange (IDX). We apply Artificial Neural Network (ANN) backpropagation methodology using financial indicators such as profitability, liquidity, and solvability as the inputs. We divide the ANN model into time categories that is t-2, t-3, and t-4. In constructing ANN model, we configure four types of splitting training and testing data. The results show that ANN backpropagation model with 30 neurons, 90% training data and 10% testing data in category t-4 works well an accuracy 95.6% for financial distress prediction in Indonesia.
Design of social media-based information systems for higher education alumni
Authors: Yunanto P W , Nugraheni M , Handayani D , Wicaksono R
Published: March 2021

This study aims to produce information systems design and alumni data of Universitas Negeri Jakarta (UNJ) based on social media that can be accessed anywhere, facilitate the processing of alumni data, store alumni data and be able to convey information to alumni. This research emphasizes the development of information system designs whose output is user requirements and use case diagrams that can be implemented into social media-based information systems. The method used to formulate user requirements is through survey techniques and interviews with several alumni and relevant stakeholders, then the data obtained are analyzed qualitatively to be synthesized into the final user requirements. From the results of the study it can be concluded that the alumni information system is considered to be very effective in attracting alumni who have been scattered. The habit of Indonesian people who often use social media to publicize their activities unconsciously has provided information about themselves to the wider community, which can be used as a database that can be used for the benefit of the campus.
Computer Based Test (CBT) using Moodle-based High Order Thinking Skills in network design subjects
Authors: Sujatmiko B , Wibawa S C , Dermawan D A , Ongge H A
Published: March 2021

This study aims to determine the description of the process of making CBT-based question instruments and the level of valid instrument tests. The procedure developed in research is Research and Development (R&D) with a Moodle-based web system. The results of the test instrument validation for each number with an average at intervals of 84.2 to 100, the results of CBT based Moodle validation have an average of 90.65% which means it is very valid, the difficulty level of easy question categories with intervals of 0.82 to 0.92, the medium category with an interval of 0.50-0.67 and a difficult problem category with an interval of 0.21-0.28 the next distinguishing power has an interval of 0-0.75.