bluuebunny/crossref_metadata_2025 huggingface dataset:
Review of digital substation equipment and technical specification in Indonesia
Authors: Ridwan M , Tambunan H B , Mangunkusumo K G H , Habibie A S , Pramana P A A
Published: March 2021

Digital substation concept improves substations in advance by enhancing the equipment at station level, bay level, and process level. This enhancement of substation requires changes of equipment at those levels. The design needs to meet each equipment’s compatibility with the others. However, some manufacturers of the digital substation in Indonesia provide different specifications for the equipment at the same level. This condition causes challenges of implementation design of the digital substation in existing substations. To enhance existing substations including conventional substation and modern substation, the digital substation specification and equipment are reviewed. The reviews are based on digital substation standards including communication protocol, network redundancy, and time synchronization. After the specification study, the provided equipment in Indonesia are compared based on their technical specification. The technical specifications are compared at station level, bay level and process level based on provided equipment in Indonesia. The compatibility study is analyzed by using provided equipment, following with the implementation study in Indonesia. This paper provides reviews of the technical specification gap of existing substations compared to the digital substation. Finally, the consideration of choosing technical specifications also provided when implementing the digital substation in Indonesia.
Performance evaluation of modified multi gap arrester
Authors: Priambodo N W , Harsono B B S D A , Habibie A S , Hartono J
Published: March 2021

The distribution network due to lightning strikes. There are several types of arresters to be developed. A modified multi gap arrester was tested to know its performance. The method used to determine its performance was done by comparing it with metal oxide type arresters through a series of laboratory tests. The testing consists of impulse test, salt fog test, and follow current interrupting test. The arrester performance related to residual voltage, breakdown voltage, and the ability to interrupt follow current were obtained through the tests. By knowing the performance of modified multi gap arrester, it can be used as a consideration in applying this technology related to the insulation stress of protected equipment and the potential for follow current phenomenon.
Voltage stress reduction for distribution line covered conductor
Authors: Pramana P A A , Surya A S , Mangunkusumo K G H , Tambunan H B , Jintaka D R , Tofani K M , Ridwan M
Published: March 2021

Interruptions due to vegetation frequently occur at the distribution line in Indonesia. Follows to that, the distribution utility decided to replace the bare conductor with the one-layer XLPE cable. However, new problems occurred mainly at the link between the XLPE cable and the post insulator on each of distribution pole. The high permittivity material of XLPE and the ceramic insulator enhance the local electric field that produces pinholes on cables. In the later phase, the pinholes become more extensive and if there is a lightning strike that causes a voltage that exceeds the Basic Insulation Level of the insulator, then the electric arc will flow from the conductor to the ground isolator through the pinhole. This paper proposed a novel design to cover the cable, including its accessories. Based on a simulation using a finite element analysis, the electric field stress is reduced by the following steps: 1. Add a semiconductor layer on the XLPE layer, 2. Replace the ceramic insulator with the polymer one, 3. Modify the binding between the cable and the post insulator by using a unique clamping method.
Technical and economical evaluation of distribution transformer with amorphous metal core in Indonesia
Authors: Harsono B B S D A , Hartono J , Priambodo N W , Tambunan H B , Jintaka D R , Tofani K M , Ridwan M
Published: March 2021

High efficiency electrical equipment usage is an alternative solution to support carbon emission reduction in Indonesia. In this research, new distribution transformer design using amorphous metal core (AMDT) was evaluated by conducting laboratory testing and field installation. According to the laboratory test result upon 4 samples, AMDT had 60.91 – 67.35% smaller no-load loss but 0.58 – 9.79% higher load loss compared to national standard requirement (although the load loss value of AMDT was within total losses tolerance). One AMDT sample failed during impulse test which should be followed up further by conducting insulation testing and design evaluation. Since the AMDT sample used 5-legged core design, the weight of the AMDT was heavier than conventional cold rolled grained oriented (CRGO) silicon steel transformer; thus, the construction planning and design should be re-evaluated for AMDT installation. According to total cost calculation based on life cycle approach by using obtained data and related assumptions, it was found that AMDT would potentially give higher economic benefit than conventional CRGO silicon steel transformer when the load factor (LF) is below 79% for 100 kVA AMDT, below 78% for 50 kVA AMDT, and below 68% for 25 kVA AMDT.
Integrated Internet of Things (IoT) technology device on smart home system with human posture recognition using kNN method
Authors: Siddiq M I , Wibawa I P D , Kallista M
Published: March 2021

IoT device technology is currently developing rapidly, for example in smart home systems that have several features including lighting, surveillance security, temperature control, water sensors, and smart electricity. IoT device consists of smart electricity integrated with human action recognition using sensor vision are developed in this work. In smart electricity system, we build some relays controlled by smartphone applications and web-based platforms. We can control the relays and monitor the voltage, current, and power used from electricity appliances that are connected to our IoT device. In human action recognition, we use a single RGB camera to capture some human poses into spatiotemporal sequences to get data for training. There are six poses for testing scenario, these poses will be clustered using kNN (k-Nearest Neighbor) method. Each human action that is recognized will be connected to an IoT device for controlling the switching mode on the relays in smart electricity system. The result in this experiment shows that the system successfully reads every single posture with quite good accuracy performance using confusion matrix.
Design and implementation of prototype smart plug at home automation based on bluetooth using Arduino Uno
Authors: Hamidi E A Z , Effendi M R , Syarifuddin F , Wildan M , Huda U N
Published: March 2021

Home automation is one of the simplify daily activities at home. Automation of the stop contact system, can make the switch operation be shortening. Arduino Uno is used as the main controller in a smart plug system. Server systems made wide the device. Bluetooth module HC-05 is used as a wireless transmission medium. The result tests got a maximum range of 17 meters with barrier and 20 meters in open space. Delay occurs with a time of 400ms. by conditioning on or off to take a trigger of contactor in a home.
Design and implementation of the quality of mineral water test equipment using fuzzy logic method based on Internet of Things
Authors: Kurniawan E , Sumaryo S , Budiman F , Happy A , Aprillia B S
Published: March 2021

Water is a chemical compound that is very important for living things on this earth. The function of mineral water for human life cannot be replaced by other compounds. To ensure that it can be used for needs, quality monitoring must be carried out continuously. This study aims at designing mineral water quality test equipment using the fuzzy logic algorithm method that is equipped with a pH sensor, TDS sensor, temperature sensor, LDR sensor, LCD, Wi-Fi module. The simulation results show that an average value of pH sensor of 8.5 - 12, TDS sensor of 300 - 350 ppm, sensor temperature of 22-25oC, and the resistance of the LDR of 110-170 Ohm sensor for daytime while the evenings of 920 - 970 Ohm. The several types of water tested was 5 areas around Bandung and Telkom University Dormitories. The accuracy of this tool reaches of 80%, it can be seen from the calibration results.
Mapping the potential energy of micro-hydroelectric power in Limboto watershed
Authors: Salim S
Published: March 2021

The use of river water flow energy for electricity generation has been widely developed to meet the electricity needs of the community. Reality in the field indicates that most of the micro-hydro power plants that are built in the river flow cannot be relied upon to meet the electrical energy needs of the community, especially in remote areas. Many micro-hydro plants cannot operate for a long time and even have a damaged condition. This is because the construction of the power plant has not gone through the proper planning and assessment process of the potential of the river flow energy to be able to operate the power plant continuously. This study aims to find out the potential of the perennial river flow energy through the hydrological modeling technique. The energy of the perennial river flow can be approached due to the amount of rain discharge in the catchment area and the components of the watershed system that affect the water flow. To determine the value of river discharges, it is carried out through the analysis of the dependable flow of the river. The results showed that the electrical energy that can be produced in Alo River is 192.55 KW, in Bionga River is 136.45 KW, in Batulayar River is 408.67 KW, in Marisa River is 147.44 KW, and in Talumelito River is 81.22 KW.
Development of electronic rubric to assess improvement of employability skills student
Authors: Subekti S , Ana A , Muktiarni M
Published: March 2021

This research is carried out on the basis of the need for assessment tools to assess employability skills. Assessment which made refer to the applicable competency standard and adjusted to the needs of each proficiency field. The urgency of this research is to design an electronic rubric evaluation tool for educators. This study aims to develop electronic rubric in measuring employability skills due to the condition which not every skills assessment uses standard assessment tools, it encourages researcher to develop assessment tools that can be used as the process of measuring employability skills by work based learning. The research method that used is Design Based Research to develop prototypes of performance evaluation tool or performance assessment. The design of performance assessment in this research is web based using SmartRubric platform. The SmartRubric application uses browser technology and is accessed through a computer network. Besides using a computer or laptop system on this application is also using mobile, such as mobile phones, smartphone, tablet PC, Mac, Android, BB and others, as long as the device has a browser application for internet access. The SmartRubric application has a program that is stored on the Server and sent via the internet and accessed through a browser interface, so that it can be accessed using a web browser through an internet network or intranet. The use of SmartRubric application through computer software that is coded in a programming which supports web-based software namely HTML, JavaScript, CSS, Ruby, Python, Php, Java and any other programming.
Implementation of portable mini wind power generator as renewable energy simulation media
Authors: Achmad F , Muslim S
Published: March 2021

This study aims to implement the portable mini wind power generator as simulation media, Indonesia as a country with two-thirds of its territory is the ocean, crowning the Indonesian nation as the world’s maritime axis. To face these challenges, the balance of technology and natural resources (oceans) is the responsibility of all Indonesian citizens, especially in the field of education which has a role to create and foster human resources. Vocational High Schools take an important role in creating skilled and competent students in their fields. The design functions to design the design of the system to be made, to sort out the functions and usefulness of the tool, as well as the components used so that there are no difficulties in making the system to be built. After the design is continued, the process of making and assembling tools. In the research implementation of Portable Mini Generator Wind Power as a simulation medium for alternative renewable electrical energy by making portable mini wind generator. Based on data from measurement and analysis results, it can be concluded that the working principle of portable mini wind power generators is to use wind as a mini generator drive, which in turn will result in a change in mechanical energy source motion into a renewable electrical energy source.
Fluids level monitoring using Zigbee
Authors: Latifah A , Sipangkar L K R H , Fatimah D D S , Elsen R , Sutedi A
Published: March 2021

Measurement is a critical element in the instrumentation and control systems in the industry, especially in the process industry. The analysis can be made in various ways and methods, one who is designing a monitoring system. The design of this monitoring system can be realized as a simulation through similar visualization with industrial monitoring systems. This paper has developed and applied fluids level monitoring systems based on Zigbee to transmit and receive data wirelessly. The system design is divided into two parts. The first one is plant design and Human Machine Interface (HMI), the system that is applied in designing measurement systems fluid level. The design and application of HMI systems use Visual Basic as the user interface with the plant. In this plant, ATmega16 is being used for the system controller and MPX2010DP sensor, which was chosen to measuring the level of fluids. This sensor is selected because this sensor uses the principle of differential pressure making it easier to use. Sending and receiving data from the PC to the plant runs very well using Local Area Network (LAN). The maximum range is 30m for indoors and 90m for outdoors.
A wideband microstrip triangle patch antenna with double dumbbell shaped Defective Ground Structure for 5G application
Authors: Sandi E , Maruddani B , Ronald D F , Ramadhan R
Published: March 2021

In the 5G cellular communication system requires an antenna that has a wide bandwidth and works at millimeter-wave frequencies. In this study, the addition of defective ground structure (DGS) to a microstrip triangle antenna was developed to improve bandwidth performance. Development is carried out through the addition of a double dumbbell-shaped at the DGS antenna structure that works at 28 GHz for 5G applications. The sample design is 4T4R microstrip antenna using Rogers RT5880 substrate material with a dielectric constant (ε_r) of 2.2, h = 0.787 mm. The sample antenna design has dimension 30.11 × 19.89 mm. This study uses a research and development approach through the calculation of DGS structure and design of multiple dumbbell-shaped on the ground layer. The simulation and measurement results show a significant increase in bandwidth performance compared to without using DGS. This study also shows the improvement in bandwidth performance and the gain of microstrip antenna with the addition of double dumbbell-shaped compared to the addition of single dumbbell-shaped in previous studies.
Developing animated video for maincourse learning
Authors: Nurani A S , Mahmudatussa’adah A , Muktiarni M
Published: March 2021

This study aims to design video animation for maincourse learning in vocational education, especially the learning maincourse which requires students to have skills in practicing maincourse dishes. It requires a companion learning facility when it take place in the outside of the classroom by using effectively and efficiently learning methods such as presenting maincourse dishes with clearly explanation and steps which is does not need to use internet access or training courses to learn them. This “Maincourse Dish” animated video is created using the rigging bone and cell shading method with 2 Dimensional model, which has a duration of 03 minutes 47 seconds, with the mp4 extension, it is used 1280x720 video resolution, and a frame rate of 24 fps. In making the animation, it is used Moho Anime Studio software to create animations, then Adobe Illustrator, CorelDraw, and Photoshop, to make modeling, and Adobe After Effects for video editing. This animated video can be a learning media for the Maincourse subject for the student’s advantage in learning material, especially the practice of making poultry-based maincourse dishes.
Designing a learning media based on video animation for patisserie learning
Authors: Yogha S , Rahmawati Y , Maosul A
Published: March 2021

Video animation is a perfect tool as a medium in the learning process in class. The purpose of this study is to design video animations for patisserie learning in vocational education. In particular, patisserie learning requires students to have skills in practicing patisserie dishes. So it requires a companion learning facility when outside the classroom with effective and efficient learning methods such as presenting manufacturing product tutorials with explanations and clear steps, no need to use internet access or training courses to learn them. This “Patiseri Product” animated video was created using the rigging bone and cell shading method with a 2-Dimensional model, which has a duration of 03 minutes 47 seconds, with the extension specification .mp4, video resolution of 1280×720, and a frame rate of 24 fps. In making the animation, using Moho Anime Studio software to create animations, then Adobe Illustrator, CorelDraw, and Photoshop, to make modeling, and Adobe After Effects for video editing. The conclusion of the research shows that the application of animation video learning media can be used to convey patisseries material that is in accordance with special needs that are in accordance with learning, and has fulfilled the expected concept.
Design of concrete structure test device on bridge using geophone
Authors: Priramadhi R A , Rizaldy R R , Murti M A
Published: March 2021

The increase in population every year makes more and more owners of motorized vehicles and cars resulting in full access to the highway, not only the highway that experiences density while the bridge is one of the factors of density due to the number of motorized vehicles and cars that pass not only at a certain time the bridge will be congested and experience enough vibrations because the load carried by the bridge is different, the greater the load held by the bridge, the more the bridge vibrates, therefore the writer will make an instrument using a geophone sensor that can measure how much vibration on the bridge and analyze how strong concrete works on the bridge which often occurs density, with the elastomer or rubber pads used between abutments with the placement of the elastomer feeding road will reduce vibrations that occur due to the burden carried by the bridge. This tool will use the main components in the form of geophone sensors. Geophone converts ground motion into voltage, Geophone is a transducer of ground movement that is very sensitive. A geophone converts seismic energy, or vibration, into an electric voltage that can be measured accurately. In this study, it was found that geophone sensors can find out the amount of voltage and deflection that occurs when a vehicle crosses the bridge, to process data in this system using a microcontroller in the form of Arduino Uno and displayed in excel data to facilitate data collection. From this study it can be concluded with a maximum deflection of 0.3 cm or 0.003 meters at a time of 1045kg, meanwhile when a vehicle load of 2 tons to 10 tons will occur a maximum deflection of up to 2 cm on the Cilampeni Bridge and on the Kopo Toll Bridge.
Maggot oil as a feed supplement for reducing methanogenesis of rumen microbial culture in vitro
Authors: Jayanegara A , Anzhany D , Despal D
Published: March 2021

Hermetia illucens larvae or known as maggot contains considerable amount of oil in its body. This experiment aimed to evaluate the use of maggot oil as a feed supplement for reducing methanogenesis of rumen microbial culture in vitro. The oil was supplemented into a feed substrate that consisted of forage: concentrate mixture (3:2 w/w). Supplementation of the oil was performed at different levels, i.e., 0, 1, 2, 3, 4 and 5% from substrate dry matter. All incubation bottles were tightly closed and incubated for 24 h in a water bath that maintained at 39oC. Results revealed that maggot oil at 4 and 5% supplementation level was able to reduce methane emission by 20.7 and 26.9% (P<0.05) in comparison to control, respectively. However, its supplementation at 3% or lower did not alter the methane emission. The organic matter digestibility parameter was linearly reduced with increasing level of maggot oil supplementation (P<0.05), but volatile fatty acid concentration was not affected. In contrast to our expectation, maggot oil at 3 to 5% increased log protozoa population and ammonia concentration than those of control (P<0.05). In conclusion, maggot oil may serve as a promising supplement for mitigating ruminal methanogenesis and the effect is dose-dependent.
Response of wheat (Triticum aestivum) growth and yield to the different water shorthage periods
Authors: Zubaidi A , Wangiyana W , Suheri H , Jaya I K D , Anugrahwati D R , Farida N , Sriwangi S
Published: March 2021

Wheat plants can grow and produce well on the island of Lombok, ranging from highlands to lowlands around 400 m above sea level, and have opportunities for further development. This adaptation effort needs to be followed by development of cultivation technology, including proper irrigation. Irrigation is a fundamental factor in achieving maximum yields in a crop land. Wheat crop does not require a large amount of irrigation as rice plants, but it is not yet known which growth periods are critical to the water requirements for wheat plants grown on Lombok Island. This study aims to determine the effect of water stress at different growth phases of wheat on the growth and yield of wheat plants. This research was conducted using the Experimental Method in a greenhouse, with 9 water stress treatments at different phases. The treatment of water stress at different period of plant development does not show a different effect on plant growth and development. However, it significantly reduces yield and yield components. The critical period of water requirements for wheat plants occurs when the plants reach the generative phase; plants experience pressure in grain production, especially when water stress occurs in the phases of heading and flowering (anthesis). Stress in the booting and milk-development phases also experiences reduction on grain production, even at the lower levels.
The impact of micro climate on flowers development in Siam orange plant (Citrus nobilis var. microcarpa. L)
Authors: Sulistiawati N P A , Astiari N K A , Suaria I N
Published: March 2021

Constraints that can affect the occurrence of induction and flowering development of Siamese citrus plants are endogenous and exogenous factors. Exogenous factors include microclimate. Microclimate, especially extreme humidity, is one of the factors that can determine the physiological process of flowering of Siamese citrus plants. Siam oranges require 6-9 wet months (rainy season) and 3-6 dry months (dry) and need enough water especially in July-August (dry season). The purpose of this study was to examine and determine the role of microclimate on the phenology of flowering Siam oranges in Badung, Bangli and Gianyar. The assessment method was observed in citrus centers from 2014 to August 2018. The results showed high rainfall occurring throughout 2014, a flowering phenology disorder that had previously flowered Siamese citrus plants 1 to 3 times a year to 4 to 6 times a year. The number of flowering periods is not supported by the number of flowers formed because the flower miscarried before the fruit-set formed, the height of the deciduous flower is supported by the large number of leaves formed at the location of the garden whose height is less than 1000 meters above sea level. Location of citrus orchards which applies an integrated management system to. New potentials are good for cultivating conjoined oranges, namely dry land or dry fields and sandy soil when compared to oranges planted in faddy fields.
The effect of potassium and planting media on production and quality of tomato (Lycopersicon esculentum) on hydroponic drip system
Authors: Hidayat C , Supriadin A , Shohibah W F
Published: March 2021

Tomato is a crop known as nutritious due to its protein, mineral, and vitamins contains. So the application of production inputs should be directed to improve of those crop quality. The aim of the research was to know the effect of potassium concentration and type of planting media on production and quality of tomato (Lycopersicon esculentum) on hydroponic drip system. The research was conducted from June to August 2019 at Cileunyi Kulon village, Cilenyi district, Bandung regency, using split-plot design with 2 factors and 3 replications. Main plot was potassium concentration (350 ppm, 400 ppm, and 450 ppm) and sub-plot type of planting media (100 % husk charcoal, 100 % cocopeat, 50 % husk charcoal + 50 % cocopeat). The result showed that there was no. interaction effect of potassium concentration and type of planting media on fruit fresh weight and fruit hardness. The potassium application up to 450 ppm as well as the rice husk charcoal and cocopeat media produced the same effect on the fresh weight and the hardness of the fruit of tomatoes and its value were slightly below its potential in plant description. There are also the vitamin C levels obtained is in the low range of the vitamin C level.
The effect of chemical fertilizer, and bioorganic-phosphate on the P-available, P-uptake, P-residue and the yield of soybean
Authors: Susilowati L E , Kusumo B H , Arifin Z
Published: March 2021

The availability and the residue of phosphate in soil are influenced by the addition of phosphorus (P) fertilizer and its uptake by plant. The addition of P fertilizer also commonly affects the plant yield. This research is aimed to assess the effect of chemical fertilizer and bioorganic-phosphate on the P-available and P-residue in soil, P-uptake by plant, and the yield of soybean. Field experiment was carried out in a Vertisol of South Lombok, Indonesia, which consisted of four treatments arranged in a randomized complete block design and replicated five times. The four treatments were P0 = control, P1 = bioorganic-phosphate + 125 kg PHONSKA ha−1, P2 = bioorganic-phosphate + 187.5 kg PHONSKA ha−1, and P3 = 250 kg PHONSKA ha−1. The P2 treatment resulted the highest P-available and P-residue in soil, the highest P-uptake by plant, and the highest yield of soybean. Meanwhile, the effect P1 and P3 on all parameters were not significantly different. There is a strong positive correlation (r = 0.97) between P-uptake by plant and the yield of soybean. As the P2 treatment produced the highest yield of soybean, and the yield at the P1 is relatively the same as P3, this indicates that the application of bioorganic-phosphate can reduce the dose of chemical fertilizer by up to 50%.
Redefining Cirebon batik into an environmentally friendly icon of West Java
Authors: Trihanondo D , Endriawan D , Haryotedjo T , Putra G M , Machfiroh R
Published: March 2021

This study aims to examine the possibility of developing Mega Mendung batik as an Eco-product in the Trusmi Batik Center Area, Cirebon, West Java, Indonesia. The benefit of this research is to increase the practical knowledge of processing Batik products and to make the sample products as a reference for similar products. This research uses a qualitative approach. Data collection techniques used are observation, interviews, and documentation regarding natural dyes and batik making techniques. The results of this study indicate a positive impact in the development of the Mega Mendung batik as an Eco-product in the Trusmi Batik Center Area. First the Mega Mendung batik was developed using conventional methods without natural ingredients. Then natural dyes were used for the Mega Mendung motif, which are red-blue coloring, with a red cloth background and blue gradation on the motif. Campaign also conducted through Eco-promotion, Mega Mendung batik now has a much higher selling value based on the type of natural batik fabric, such as in printed batik, embroidered batik cloth, and contemporary batik. In the future, this Eco-product development needs to be continued for Mega Mendung batik to stay as one of the distinguished culture of Cirebon.
Estimation of 3D hydraulic conductivity distribution of unconfined aquifer using the geostatistical method and its relation to water quality and flooding in Upper Citarum River
Authors: Arifin A , Ramdhan A M , Suwarman R , Irawan D E , Hutasoit L M , Puradimaja D J
Published: March 2021

The 3D distribution of hydraulic conductivity in the unconfined aquifer is needed to understand the interaction between groundwater and Citarum River, which may relate to water contamination and flooding. In this study, it was estimated using the geostatistical method. The data used are the hydraulic conductivity parameter from thirteen large-diameter dug wells determined using the slug test method. Further analysis was conducted using groundwater and Citarum River physical parameters, i.e. total dissolved solids, pH, and temperature. The results show that the hydraulic conductivity of the unconfined aquifer in the Upper Citarum River ranges from 8.34 x 10−7to 2.19 x 10−5m/s. The area with relatively high hydraulic conductivity, i.e. Ciparay and Solokan Jeruk Sub-districts, will have a greater possibility of groundwater or river water contamination depending on their interaction. Meanwhile, the area with relatively flat topography and low hydraulic conductivity, i.e. Majalaya and Baleendah Sub-districts, will be more susceptible to flood. Therefore, the mitigation of water contamination and flooding in the Upper Citarum River should consider the 3D hydraulic conductivity distribution, e.g. by monitoring the groundwater quality in some dug wells located in high hydraulic conductivity area and installing recharge or injection well to eliminate the artificial runoff.
Eco friendly pigment from tamarind seeds for painting application
Authors: Yuningsih C R , Trihanondo D , Maulana T A , Zen A P , Wiguna I P
Published: March 2021

Indonesia is a tropical country that has an abundance of flora. Tamarind or Tamarindus indica is one of the most famous trees and fruit in Indonesia. Now, these plant wastes are starting to be processed to be taken by the artisans to be made into powder or powdered tamarind seeds (Gutta Tamarind). Gutta tamarind becomes a substitute for wax or clay used in the batik process. Gutta tamarind is often referred to as cold batik because it does not use a heater like a process commonly found when using clay or better known as batik gutta tamarind. Gutta Tamarind’s exploration as a technique in painting aims to make technical innovations and this tamarind gutta can be used as an aesthetic element in a painting. The research method will be carried out by developing techniques in painting through an exploration of the gutta tamarind medium as a color barrier and showing various artistic breakthroughs generated by the variety of research and exploration of its constituent materials into paintings as a substitute medium for brush strokes. It is hoped that the results of this study will add insight into the use of environmentally friendly plant waste and produce paintings with aesthetic elements and new artistic breakthroughs.
Construction map model of water location permits in the implementation of licensing for marine space utilization
Authors: Astor Y
Published: March 2021

Based on the results of the identification and inventory of existing laws and regulations, there are 12 ministries carrying out sea space utilization activities consisting of sea surface space, sea column space, and seabed space. The 3-dimensional marine space is influenced by dynamic characteristics of the sea which makes recording and administering Marine Space Utilization Location Permits more difficult than recording and administering permits on land. This study makes a Water Location Permit Map model that describes the location of marine space utilization objects and their utilization boundaries. Water Location Permit Map is made using a coastal environment map and a marine environment map from the Geospatial Information Agency, as well as a zoning map of the coastal area from the Ministry of Marine Affairs and Fisheries. The results obtained that the Water Location Permit Map that was made using existing maps cannot yet describe the object of sea space utilization. A larger input map scale is needed, one of which is by taking remote sensing satellite image. Visualization of sea space in 3 dimensions can be displayed by classifying Location Permit Maps into 3 layers based on different sea depths namely sea level, sea column, and seabed.
The study of fly ash effect as fertilizer
Authors: Anggarani B O , Rasgianti R , Triani M , Sitanggang R B
Published: March 2021

The large amount of fly ash (FA) in Indonesia cannot be used optimally due to Government Regulation No. 101 of 2014 concerning Management of Hazardous and Toxic Waste which stated that FA was included in the category of hazardous and toxic waste. This study aims to conduct a study related to the effect of FA as fertilizer on plants. Five samples of FA obtained from five coal-fired power plants. They will be mixed with the soil by three different ratios: 25% FA:75% soil, 50% FA:50% soil, and 100% FA. This research used chilli, corn, and okra as the seeds. The finding shows that most of FA samples can be used as fertilizer for some plants.
Information technology as a less resources consumption system to support river water quality monitoring activity in Indonesia
Authors: Yustiani Y M , Ramadhan S , Wahyuni S
Published: March 2021

The current river’s condition in Indonesia has decreased in water quality, especially in big cities. The rivers have been polluted by domestic and non-domestic waste. Therefore, the Government has to monitor rivers water quality periodically to see its condition of the rivers water quality. Utilization of the information technology in river quality monitoring is one of the less resources consumption. This study aims to investigate the development of information technology in big cities in order to support to monitoring river water quality. This study is carried out with literature and references reviews as well as expert interviews. The results showed that the information technology has not yet been applied to monitor rivers in Indonesia. Several efforts have been started, but the systems are still incomplete. Although smart water program has been adopted in Indonesia, it shows problem in its sustainability due to financial difficulty, devices durability, and connection instability. To overcome these obstacles, it is recommended that government should have strong inter-collaboration between divisions and partnership with other institutions.
Identification of the impact of vegetation cover changes and the development of urban areas on Urban Heat Island using GIS and remote sensing: A case studies of Sleman regency, Province of Yogyakarta
Authors: Dewantoro B E B , Khafid M A , Putra A D A , Wicaksono A P , Andita F W
Published: March 2021

The phenomenon of urban area development both physically and socially as the center of government in Sleman can indirectly cause an impact on the atmosphere. One of the impacts of the atmospheric change, the urban heat island, which is influenced by the physical and social development activities, is expanding. The research focuses on the study of surface urban heat island (SUHI) aimed at knowing the spatial distribution of the UHI intensity in Sleman Regency. The methods used in this research are the integration of remote sensing techniques and geographic information systems (GIS) using thermal bands of Landsat 8 OLI/TIRS and image statistical analysis using Buffer Boundary Analysis to identify the potential occurrence of UHI in Sleman. The result of the processing shows the potential of high-intensity urban heat island in Depok subdistrict, Ngemplak subdistrict, Kalasan subdistrict, and part of Mlati subdistrict with the varying intensity of UHI. The highest UHI intensity is around the district of Depok and Mlati with an intensity of 2,001 - 6,000 °c during the period from 2014 to 2019.
Augmented Reality-based ecolabel model for environmental awareness
Authors: Safitri D , Marini A , Yunaz H , Putra ZE F F , Nuraini S , Rihatno T , Ibrahim N
Published: March 2021

The purpose of this research is to develop Augmented Reality-based ecolabel model for environmental awareness. This research and development were done in Jakarta, the capital city of Indonesia. The product of this research is augmented reality called ecolabel on the Android Smartphone having eight logos to give environmental awareness to the consumers. This product giving the consumers some 2-dimension information containing accurate, fast, verifiable, and not misleading information related to environmental aspect of the certain products. This product should be supported by sticker as marker to turn on augmented reality. Consequently, the society will be more appropriate in making decision to choose the product used. Revision on the basis of expert validation reaching 3,67 from maximum score 4 is that pictures given to the nine logos in this product should be added more to provide more examples to the consumer. The conclusion of this research is that Augmented Reality-based ecolabel model for environmental awareness is already valid.
The correlation of the density of seagrass with the abundance of Ophioderma longicauda (Ophiuroidea class) in the Littoral Zone Cikabodasan Beach
Authors: Mulyaningsih S , Desmonda E , Permana K , Hernawati D , Rohayat A
Published: March 2021

Seagrass is a group of flowering plants found along the coast. Seagrasses become one of the habitats of the Ophiuroidea group. The study was conducted at Cikabodasan Beach, Garut. The aim is to determine the correlation of seagrass density with abundance of Ophiuroidea. The research method used is descriptive correlational. Samples were taken as much as 30% of the length of the Cikabodasan beach. The sampling technique was done by purposive sampling where 9 line transects were installed with 90 squared transects measuring 1 x 1 m2 in 3 stations. From the results of the study obtained an average density of two species (Thalassia hemprichii, Cymodocea rotundata) of 346.23 individuals / m.2 This density is included in very tight criteria. While the abundance of Ophioderma longicauda (3.33 individuals / m2) is included in the less category. From the results of statistical calculations with the Pearson correlation test shows the correlation coefficient of 0.834. These results indicate that there is a significant correlation between seagrass density and Ophioderma longicauda abundance.
Analysis of the distribution pattern of Kaboa (Aegiceras corniculatum) in Cipalawah Beach
Authors: Mulyaningsih S , Iman A N , Permana K R , Mulyani L S , Ardiana C
Published: March 2021

Kaboa (Aegiceras corniculatum) is a plant that lives around mangroves where the distribution pattern varies. Variations in the distribution are spread out or clustered. The study was conducted at Cipalawah beach in Garut Regency, with the aim of finding out the distribution pattern of kaboa (Aegiceras corniculatum). The research method uses descriptive methods. The plot line method with multilevel plots is used to obtain research data. Research data obtained from each location taken by the quadratic method. Where each data obtained from variations in plant diameter. Data on diameter of tree plants (10 cm) was obtained from plots of 10 x 10 m size. Data on diameter of sapling plants (2-10 cm) was obtained from plots with a size of 5 x 5 m. Data on seedling diameter (10 cm) was obtained from a plot of 1x 1 m size. The results showed that the distribution pattern of kaboa (Aegiceras corniculatum) was clustered.
Maritime biota waste as eco-jewelry materials, potentials and possibilities
Authors: Atamtajani A S M , Firdauzi G N , Yudiarti D
Published: March 2021

This research aims to describe the process of designing jewelry from marine biota waste. The background of this writing is the utilization of marine biota waste which is still conventional in applying visual quality in the form of the uniqueness of marine biota waste as a personal need. Maritime Biota Waste have potential to be developed into jewelry to meet personal needs as self-charm of lifestyle. Some accessories from those waste are usually in the conventional form without any significant changes. Accessories produced by mass production usually do not have removable parts because they prioritize ease and efficiency of production. This research focuses on the development of the waste potentials which is reviewed with a visual strategy and uses the Interchangeable Elements design method. The method conducted has relevance between fluctuations in market share changes and production flexibility. This helps to find out the parameters for applying visuals to jewelry and enhances self-charm by using removable parts of jewelry as adjustments to achieve optimal visual quality.
The effect of temperature and pollution concentration on Cypermethrin removal in liquid media by using Thiobacillus sp. and Clostridium sp.
Authors: Grimaldi C , Iswanto B , Rinanti A
Published: March 2021

Cypermethrin is known as synthetic pyrethroid (SP) which works to interfere the nervous system with a molecular formula of C9H11C13NO3. The use of pyrethroid pesticides which tends to be high and continuous without regard to the rules of pest control can have a negative impact, that is decreasing environmental quality and decreasing biodiversity. Pollution degradation in the soil due to pesticide residues can be done biologically by doing remediation technology. One of the microorganisms that can degrade insecticide residues in the soil is bacteria. Thiobacillus sp. and Clostridium sp. are insensitive to cypermethrin which has been prove by no inhibition zone formed on a media that contained cypermethrin. Therefor this research the aim is to determine the growth response of bacterial culture using Thiobacillus sp. and Clostridium sp. as a bioremediation to remove the insecticide cypermethrin in liquid media. Optimization of environment conditions use temperature with a variation (°C) of 25-40 and concentration of cypermethrin with a variation (ppm) of 100-250 cypermethrin analysis using the Gas-Chromatography Mass Spectrometer (GC-MS). This research proves that the bacterium Thiobacillus sp. and Clostridium sp. capable of removing cypermethrin in liquid media reaching 97% occurs at optimum conditions at 30°C and optimum concentration of 100 ppm.
Effectiveness of fertilizers with bioremediation techniques for planting jasmine in the home industry bridal flower decoration
Authors: Nursetiawati S , Siregar J S , Josua D P
Published: March 2021

Bioremediation is a technique in reducing environmental pollutants. Bioremediation in this study modifies toxic pollutants by utilizing microbial waste and traditional plants that can be used to nourish the home industry jasmine flowers in the manufacture of bridal flower decorations. The study design uses qualitative research. The sampling technique was done purposively. The study was conducted at the bridal studio of Laladon Indah and Beji bridal studio in Depok, which has a special jasmine garden for bridal flower accessories. Samples were obtained through observation. The results showed that; (a) bioremediation techniques with liquid fertilizers are easy to use within the scope of the home industry, (b) bioremediation techniques are considered economical in making and processing materials, and (c) fertilizer manufacturing techniques with bioremediation are declared safe for the environment and can be used for planting and breeding buds jasmine flower which will be used as material for bridal flower accessories.
River water quality modeling as a supporting tool of river management in Indonesia
Authors: Yustiani Y M , Wicaksono E M , Wahyuni S
Published: March 2021

Many urban river water qualities in Indonesia have decrease due to both domestic and non-domestic wastewater discharges. One effort in restoring the river quality is by modeling of the river to determine the most appropriate actions to take. At present many river modeling have been carried out in order to restore river water quality. However, implication of modeling utilization is still insignificant. This study aims to investigate the application of water quality modeling in Indonesian urban rivers. Methods used in this study including expert interviews, previous research review, and data analysis. The research result gives condition that modeling is merely applied in limited function. Stakeholders sometimes doubt the modeling results. It is caused by several aspects of uncertainty, such as river discharge fluctuation, unstable pollution concentration, etc. In addition, the model used is often obtained from sub-tropical area, so there is a disparity of conditions with the environment in Indonesia. Nevertheless, water quality modeling plays an important role in environmental impact assessment as a prediction tool in Indonesia.
Vocationalization of skills education based-on local wisdom in era of ASEAN Economic Community
Authors: Hanafi I , Febriana R , Zakir I
Published: March 2021

As the implementation agreement of the ASEAN Free Trade Area (AFTA), Indonesia should have right strategy especially in the field of basic education. Graduates of basic education should have adequate knowledge, attitudes and skills including ability to adapt the work situation changes due to change dynamically. The study aims to develop a model of skills learning model for student at the basic education level based on local wisdom. The research method used is Research and Development, which is in accordance with the research objectives. The skills learning model is vocationalization based on local wisdom at the basic education level. It is used to find solution as an effort to complement and prepare basic education graduates who do not continue their education to become productive and competitive workforce to face global competition, especially to facing the Asean Economic Community. Initial research results are the interview instruments and guideline reviewed by experts consist of 1) local potential resources, 2) selection of basic skills type in schools, 3) availability of equipment and materials for skills practice, 4) school resources, 5) support the parties to the implementation of skills learning, and 6) the process of learning skills. Based on the results of previous research, hypothetical skills learning model was developed as a form of learning that could be used to provide initial provisions for pre-vocational skills based on local wisdom. The model can provide insight into the workforce and increase motivation, and work ethic, as well as to build employability skills for students in the basic education level.