bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of an electronic book epub 3.0 as a learning resource for blended learning IPA Terpadu
Authors: Nasrulloh I , Rahadian D , Bariah S H , Purwanti Y , Imania K A N
Published: March 2021

The purpose of this study was to produce an electronic book on IPA Terpadu competency and find out the quality of the product as a learning resource for blended learning. An electronic book consisting of text, images, and video, readable on computers or other electronic devices. The development of this ebook consists of 3 stages: planning, design, and develop. Testing electronic book on various devices with different operating systems on mobile operating systems (android) and personal computers (Windows). The results of the study show that: (1) the developed product is an electronic book format epub 3.0 on IPA Terpadu, (2) the results of field test show that the developed product has a good quality, results with an average of 85% (very satisfied)
Prediction of energy consumption using artificial neural network method in one of shopping center in Cirebon city
Authors: Pinanggih D H , Abdullah A G , Hakim D L
Published: March 2021

The faster economic growth will affect the increasing electrical energy needs. A technology to predict energy consumption is important for saving and energy efficiency. This will encourage the achievement of important objectives of the government namely the use of electricity on target and reduce environmental problems such as the greenhouse effect. So importance for predictions with sophisticated technology based on artificial intelligence such as artificial neural networks. The results of this study indicate that this method is very good at solving nonlinear problems and better than conventional methods.
Optimizing public street lighting and redesign of public road lighting based on DIALux and fuzzy logic
Authors: Wicaksono H I S , Abdullah A G , Hakim D L
Published: March 2021

Road lighting is one of the most important infrastructures in an urban area, one of its main functions is to provide comfort for road users as well as crime prevention at night. But besides having various functions, public street lighting systems must comply with standards and also pay attention to aspects of energy efficiency. This study discusses the optimization of using artificial intelligence with civil fuzzy logic methods to obtain a level of evenness that is in accordance with the standard, with input variables such as road width, pole height, lamp power and mounting distance between poles. Then the results of the Mamdani fuzzy logic are used as the basis for re-design input using DIALux and some additional input according to the standard criteria contained in the DIALux software. The results of this study indicate that both the level of evenness and other aspects have met the standards and also have energy savings of up to 58.6% of the existing conditions, this research is expected to be a recommendation in the design of street lighting.
Multi-agent formation based on self-loop Laplacian
Authors: Djamari D W , Fikri M R
Published: March 2021

This work studies formation control of Multi-Agent Systems (MASs) where its formation size is scalable via a scaling factor (scalable formation). Literature on scalable formation where the design of communication weight is based on the formation pattern is limited to the case of k-rooted graph and generic configuration of formation pattern. Different from the literature, scalable formation in this work is achieved under a weak assumption on graph and the formulation allows for a more general formation pattern. In this work, scalable formation is achieved by designing a self-loop communication weight for each agent which results in a new matrix called self-loop Laplacian. The self-loop weight is a function of the desired formation pattern. The convergence of the proposed algorithm is shown by standard linear system theory by first deriving the spectral properties of the self-loop Laplacian. The effectiveness of the proposed method is illustrated by numerical example. The proposed method is shown to achieve scalable formation for any initial position of agents.
Comparison of load flow analysis using PSAT and ETAP
Authors: Rif’an M , Raharjo I A , Syufrijal S , Pradana E
Published: March 2021

The level of electrical quality has become a necessity in supporting human activities, especially in voltage stability. To support the calculation of voltage stability, various load flow methods have been developed. Load Flow Analysis is very important in planning and implementation in designing future power system expansion and in determining the best operation of the existing system. The tools for calculating simulation based power flow are the Power Tool Analysis Toolbox (PSAT) and the Transient and Electrical Analysis Program (ETAP). This paper discusses the comparison of the performance of the two load flow simulation tools, PSAT and ETAP. The Gandul Substation network data in Indonesia in April 2019 with a load of 15.37 MW is used for simulations. Load flow analysis is performed using Newton Raphson method with a network of 11 buses (150 kV, 20kV). The simulation results show that PSAT has a deviation of about 0.663% to the Bus Voltage from GIG and ETAP simulation has a deviation of about 0.562% to the Bus Voltage from GIG.
Frequency changing effect on current transformer class 0.5s
Authors: Surya H H , Sudiarto B
Published: March 2021

This paper is aiming the frequency effect to a current transformer instrument, which is used to measure current that flow in a conductor. As technology is developing, the usage of a non-linear load is higher. This will cause a problem in the power quality of an electrical system. This disturbance in power quality influencing the working frequency on an electrical system. As a current transformer is one of the equipment in the system, when the primary of a current transformer is disturbed, it could also affect the secondary side. The result shows that the frequency changing has an effect on error ratio and phase displacement on a current transformer class 0.5s, which will decrease while the frequency is increase but still within the standard limit. Frequency changing also has an effect on Security Factor on an instrument, which will increase when the frequency is increasing. So, it is important to keep frequency within the fundamental frequency.
Forecasting electrical energy demand of PT. PLN (Persero) UP3 Sukabumi using analytical, econometrics, and trends methods
Authors: Subekti M , Rahardjo I A , Rosyanti D
Published: March 2021

This research was conducted to determine the electrical energy demand of PT. PLN (Persero) UP3 Sukabumi using analytical methods, econometrics and trends in 2019-2029. This research used a combined method which was a method compiled by combining several the models such as econometrics, analysis, and trends with a sectoral approach which was an approach by grouping electricity consumers into four sectors, namely the household, commercial, public, and industrial sectors. The results showed that the population rate rose 0.36% per year, the growth GRDP rate rose 6.26%; the number of electricity customers in the household sector rose 5.26% per year, the number of commercial electricity customers rose by 13.96% per year, the number of public sector electricity customers rose 7.58% per year, and the number of industrial sector electricity customers rose 3.53 % per year. it can be concluded that over the next 10 years the electricity demand will increase by 3,080.83 Gwh with an average growth of 10.69% per year.
Analysis of the influence of loading on age of use of transformers in Botupingge substation
Authors: Adam M A , Mohamad Y , Tolago A I
Published: March 2021

The lifetime of a transformer cannot be determined with certainty due to several factors. One of them is the loading and ambient temperature that affects the transformer, especially at the Hot Spot temperature and the shrinkage of its age. The greater the loading, the higher the Hot Spot temperature so that the life span of the transformer is shorter. This study aims to determine the effect of loading on Hot Spot temperatures, loading forage losses and to determine the effect of loading on the 150kV / 20kV transformer life in the Botupingge Substation. The results of research at Botupingge Substation were obtained at 100% loading of 4.47 pu/day with an estimated age of 4.03 years, at 90% loading of 1.14 pu/day with an estimated age of 15.79 years, and at 80% loading of 0.33 pu/day with an estimated age of 54.55 years. Effect of maximum temperature with loading on 20 November 2018 results in a decreasing age of 0.3611 p.u / day on the type of refrigerant ONAN, and the shrinkage of the age of 0.0228 p.u / day on the type of ONAF cooler so that the estimated lifetime of the Botupingge substation transformer will reach 20 years.
Optimal sizing and sensitivity analysis of Hybrid Renewable Energy Systems: A case of Ur island in Indonesia
Authors: Aditya I A , Aisyah S , Simaremare A A
Published: March 2021

This study presents the design optimization and sensitivity analysis of the hybrid renewable energy system (HRES) for Ur island in Indonesia. The Ur Island is a remote island where local residents unreachable by electrical network systems but has potential to utilize the solar Photovoltaic (PV) and wind energy. The analysis of the hybrid systems is modeling in the Hybrid Optimization Model for Electric Renewable (HOMER) to find out the most cost-effective configurations for electricity requirement of 234 kWh/day primary load with 25.6 kW peak load. The results show that system with the configuration of PV-Wind-Diesel-battery delivers the best optimal design for Ur island in terms of cost of energy (COE) and Total Net Present Cost (TNPC). In addition, the impact of solar radiation, wind speed, diesel price, O&M cost, investment cost and replacement cost are identified by carrying out the sensitivity analysis.
Analysis of unbalanced voltage due to varying amounts penetration of rooftop PV in distribution network with balanced load
Authors: Jintaka D R , Priambodo N W , Harsono B B S D A , Hartono J
Published: March 2021

The increased penetration of rooftop PV on distribution networks is triggered by the decreasing prices of solar panels which will get closer to reach the grid parity. However, the massive rooftop PV without storage at medium and low voltages will cause power quality problems, namely increased of voltage fluctuations, unbalanced voltages and harmonics, as well as the emergence of active load fluctuations and power factors on the nearest bus. This paper analyzes the increase in unbalanced voltages in the distribution network due to the massive rooftop PV without storage. In a balanced load configuration, the presence of rooftop PV in certain phases with varying amounts penetration will cause voltage imbalances in the distribution network. From the results of this simulation, it can be concluded that with a higher number of rooftop PVs, the spread of rooftop PVs on a higher number of phases results in a smaller voltage imbalance than if the rooftop PV is only concentrated in one particular phase. Then, longer network lengths provide greater imbalance compared to networks with shorter distances.
Design of a prime mover turbine propeller open flume micro-hydro electric power plant 1 kW
Authors: Suryadi A , Eriyadi M , Usman D , Hamdani Y M , Abadi S C
Published: March 2021

West Java has many rivers that have high falls and varied water discharges where utilization is not optimal. The study aims to utilize water energy to be able to produce a Micro Hydroelectric energy generator. The design of this PLTMH starts from measuring the potential of water, designing turbines and generators, then observing the work system of PLTMH and estimating the electric power that will be generated by the PLTMH. From chosen location, it is known that the water flow is 0.0059 cubic per second and has a waterfall height of 4 meter. This data is used to select the type of turbine, selection of reservoirs, rapid piping, and generator design. The results obtained by the design of Micro Hydro Power Plant (PLTMH) using open flume propeller turbines and 3-phase generators are changed to 1 phase. Open flume propeller turbines have a simple construction and can be operated at a waterfall height of 3-6 meters and low water discharge so that the use of open flume turbines for micro-hydro power plants will be used in river flows that have high waterfall and water discharge the low one is very appropriate. With a turbine rotation speed of 2,063 rpm, this PLTMH is capable of producing 1,346 watt turbine power with a 45 liter per second water flow so that the power obtained is 1,076 watt.
Performance evaluation of 5 MW Solar PV Power Plant in Kupang
Authors: Nugroho W A , Sudiarto B
Published: March 2021

Government of Indonesia have target to achieve 23% share of renewable energy in National energy mix by 2025. As a part of the target, solar energy needs to contribute as much as 6.5 GW installed capacity in 2025. Therefore, Government of Indonesia develop policy to promote renewable energy, especially solar energy. In 2013, Ministry of Energy and Mineral Resources launched High Tariff Regulation for Solar PV Power Plant. The 5 MW Kupang Solar PV Power Plant is one of the result of the policy. It was the biggest Solar PV Power Plant project in Indonesia. This project located in Oelpuah District, Kupang Regent, in East Nusa Tenggara. This Solar PV Power Plant consist of 2,208 units of 230 Wp solar PV module manufactured by state owned company namely PT. LEN Industry and 250 units of grid inverter manufactured by SMA. Started operation in March 2016, this Solar PV Power Plant already contribute in national renewable energy share. By using the recorded data, evaluation of power plant performance conduct by using Performance Ratio calculation. During March 2016 to December 2019, the Plant have produced 25.3 GWh of electricity. Based on IEC 61724 methodology, daily Performance Ratio is between 0.7 and 0.9. In additionally, economic analysis of this Plant was calculated based on realization of project income. It shows that the investment will be returned by 8th year of the Plant operation.
Alteration from radial to ring power distribution to improve system reliability: A case study
Authors: Winandi H , Sudiarto B
Published: March 2021

Outage of power system supplying oil and gas production facilities causes hundreds of barrel of oil equivalent loss per hour. Hence, there is a need to improve the supply continuity by e.g. altering the power distribution configuration from radial to ring. However, switching to ring configuration demands adjustment related to system capability in delivering higher current, taking longer route, or handling higher fault current. This study develops an approach to assess those requirements and benefits. The evaluation includes load flow, short circuit, protection relay coordination, and reliability analysis. This study aims to evaluate the existing system capability in applying ring configuration and recommend any required adjustment. This study also intends to estimate the reduction of outage duration. Overall, the existing radial power distribution system can be switched to ring configuration with several adjustments. The ring application offers 43.07 percent annual outage reduction from 17.322 to 9.861 hours annually.
Intelligent control system for high efficiency Electric Vehicles
Authors: Rif’an M , Media’s E , Firmansyah H
Published: March 2021

Brush-less Direct Current (BLDC) motor drive systems are widely used in electric vehicles (EV). However, most EV control strategies only focus on BLDC motors without considering changes in different driving conditions. This paper proposes an intelligent control strategy based on an intelligent neural network that can change control parameters based on changing driving conditions. This system has the ability to self-learning and adapt based on driving conditions. The simulation is carried out using the Electric Vehicle Drive Train model and run on the MATLAB-SIMULINK platform. The simulation results show that the smart control strategy designed shows very good efficiency with minimal errors and quickly adapts to different driving conditions.
Technical and financial analysis of a mini-hydro power plant 2x500 kW Bandung Regency, Indonesia
Authors: Prabowo H , Sudiarto B
Published: March 2021

The new regulation of Indonesia Energy and Mineral Resource Minister PERMEN ESDM 50, 2017 changed the tariff of mini-hydro power plant in the Bandung Regency from Rp. 1,200/kWh to Rp.850/kWh. Although the tariff change, the regulation is going to be build owned after 20 years. It needs investment recalculation according to the new tariff. The technical studies show the potential electrical energy and the turbine’s type. The financial analysis provided the feasibility of the project used IRR, NPV, and Payback period method. The variable used is the EPC cost of some turbine brands and civil work. This paper informed that the project is feasible for investment and construction. The results of the calculation are IRR 9,69%, NPV RP. 8.373.579.334 and the Payback period 7 years and 9 months.
Design and implementation smart parking based-on Visible Light Communication
Authors: Hartaman A , Darlis D , Rabani I , Gilang M
Published: March 2021

In general, the parking doorstop system used in Indonesia, still using a cable or bluetooth to connection to a button or switch for open and close the parking doorstop. To record the identity of the vehicle still using manual paper, and to enter and leave the vehicle still using the operator. This results in a quite solid vehicle queue. The parking system above is not reliable for a faster parking system. So this research will utilize Visible Light Communication technology by utilizing the characteristics of several photodiode sensors and lighting to send and receive text data from Visible Light Communication (VLC). In this parking system will utilize vehicle lights in the form of Light Emitting Diode (LED) lights, and use Pulse Width Modulation (PWM) communication from the sender with a frequency of 490 hz with time efficient. In this research, vehicle that will be used is a motorcycle. The results of the study for receiving and sending data using PWM modulation which can still be read and received correctly are at a distance of 220cm during the day with a value of 245 and 290cm lux at night with a value of 163 lux. receipt of data from the sender that is equal to 0.28 seconds. In this study the data transmission angle was changed and obtained the recipient response value at vulnerable distances of 50 to 90cm with effective data that is at an angle of 5 degrees.
Development of learning media patisserie based on hybrid learning
Authors: Rahmawati Y , Yogha S , Maosul A
Published: March 2021

Utilization of the internet in patisseries learning is not optimal yet, the use of media in learning is not entirely interesting and varied, task collection and evaluation of learning outcomes are still print-based, one of the difficulties associated with technical issues is understanding the material and collecting assignments. These three factors are the background of the learning management system in the implementation of hybrid learning based patisseries. Learning Management System is one way to develop online learning or e-learning, which is a web-based learning management application that facilitates learners to learn as they should in a virtual classroom. The Learning Management System used in this study is a Web-based Learning Management System that is available at https://spot.upi.edu/. The design of the Learning Management System model in Patisserie learning is useful to assist in the teaching and learning process. Learning programs based on the use of internet technology (online) that can be done without the limitation of space and time ‘any time anywhere’. This Learning Management System application model, made based on the web, with the aim to enable lecturers and students who become the user model of this application, to access learning plans and learning material through the internet wherever they are. Supporting facilities in the form of network and network server at UPI have reached 800 Mbps, then from the SPOT process aspects using licensed software namely Microsoft Office and hardware +-970 with the core 2 processor, P4 flat slim monitor. In addition to accessing learning material, this learning management system helps users to be able to discuss topics by on-line using the forum provided. This study aims to develop a hybrid learning based learning management system for the readiness of students’ competency test.
Design of earthquake early warning system based OMRON D7S vibrate sensor
Authors: Fajri A H , Murti M A , Priramadhi R A
Published: March 2021

Indonesia is a country that is very prone to earthquake. This disaster can have a very large impact from main destruction of ground motion and secondary destruction from building rupture. By providing early warning system, secondary disasters caused by the earthquake, such as fire due to gas leakage, electric shock or loss of important personal data, can be prevented. This research designs an early warning system against earthquakes, where the sensor used was 3d accelerometer-based OMRON D7S vibration sensor. A warning is also sent to personnel or web-server via GSM communication. The system calibrated with a standard tool MEISEI G401 owned by Indonesian Earthquake Agency (BMKG). Test showed that early warning system have accuracy value of 74.32%. From the testing that has been done, the time delay in sending data is greatly influenced by the state of the surrounding environment. Data is sent and stored to an SQL-based database, with an average delivery delay of 1.7 seconds. This system successfully provides an early warning using the buzzer alarm as desired. The percentage of success of the buzzer turns on as desired is 100%.
Chitosan as a feed additive: Its modulatory effect on methane emission and biohydrogenation under artificial rumen system
Authors: Jayanegara A , Harahap R P , Suharti S , Nahrowi N
Published: March 2021

This study aimed to determine the effects of chitosan addition on methane emission, fatty acid biohydrogenation and fermentation profile of rumen simulation technique (rusitec). Four studies reported chitosan use as a feed additive in the rusitec system were integrated into a database. Treatments were categorized into control (no chitosan addition) and chitosan addition at different levels. Various studies were treated as random effects whereas treatments were considered as fixed effects. Data were analyzed by using mixed model methodology. Significance was declared when P<0.05 and tendency was stated when P<0.1. Results showed that chitosan addition reduced methane emission in comparison to control by as much as 28% (P<0.05). Total volatile fatty acid concentration was not altered due to chitosan, but acetate proportion was decreased (P<0.05) while propionate proportion tended to elevate in the addition of chitosan (P<0.1). Chitosan did not influence ruminal pH, ammonia concentration and nutrient digestibility (organic matter, crude protein and neutral detergent fiber) of substrate. Proportions of vaccenic acid (P<0.01) and conjugated linoleic acid (P<0.001) were increased by the addition of chitosan. In conclusion, chitosan may provide beneficial effects in the rumen by mitigating methane emission and elevating fatty acids contributing to human health.
The efficiency of municipal solid waste management by transforming the collection and transport systems on Wangi-Wangi Island, District of Wakatobi
Authors: Wahyuni I R , Supriatna A M , Wijayanti P
Published: March 2021

Wakatobi is the center of the world’s coral triangle with its rich marine biodiversity. Aside from being a conservation area, Wakatobi is also a tourist destination that is demanded to be able to maintain the quality of its environment. One of its challenges is solid waste management. Wangi-Wangi Island is an urban area of Wakatobi that requires attention in solid waste management. Nowadays, the handling of solid waste in this area only covers 54%. Waste collection and transportation systems have not been through good planning. In addition, the limited facilities and the lack of operational costs are the causes of low coverage handling services. This study aims to analyze the system of collecting and transporting to make solid waste management efficient on Wangi-Wangi Island. The research methodology was conducted by surveying the existing patterns, analyzing the system by transforming the collection pattern and selecting the best transportation route using GIS. The results showed that by changing the pattern of transportation of solid waste from direct to indirect and choosing the best route with the fastest travel time. Solid waste management coverage can be increased by 80% by reducing transportation costs from 46,596 to 31,475 rupiah / ton or savings up to 30%.
The effect of hydroponics systems on the growth of lettuce
Authors: Frasetya B , Harisman K , Ramdaniah N A H
Published: March 2021

Shifting patterns of consumption in urban communities to consume pesticide-free and clean vegetables encourage the development of hydroponic cultivation in urban areas. In hydroponic lettuce cultivation, resource efficiency in the production stage is vital to be implemented so that the profits of hydroponic farmer increase. This study aims to provide recommendations for a more efficient hydroponic system to increase the growth of lettuce plants. The research method used in this study was a complete randomized design consisting of five treatments that were replicated five times. The treatment consists of five types of hydroponic installation systems, namely: A = Nutrient Film Technique System (NFT), B = Deep Film Technique System (DFT), C = EBB and FLOW Systems (EFS), D = Aeroponic Systems (AS), and E = Floating Raft System (RFS). The parameters observed to measure the effectiveness of each system in increasing the growth of lettuce plants are plant height, leaf number, fresh weight, and shoot-root ratio. The observational data were then analyzed using analysis of variance at 5% significance level and Duncan’s test at 5% level. The results showed that the NFT hydroponic system of lettuce plants was 6%-10% more efficient compared to the floating raft system and DFT system in increasing yields.
Recommended plants for green open space to enrich bird diversity in Gedebage region Bandung West Java
Authors: Yuliawati A , Pramadi R A , Zuldin M , Yusuf D K , Jamaludin A N , Patoni U
Published: March 2021

Gedebage is projected to be the center of Bandung city government. A good urban plan must have at least thirty percent green open space in that area. Therefore, it is necessary to plant more trees on the Gedebage to increase green open space. To enrich bird diversity, the type of plants that planted on green open space must have added value as bird habitat. The aim of this study is to obtain a list of plants used by birds that are suitable and can grow well in the Gedebage. The method used was direct observation with line transect method to record plants species that used by birds in Bandung city park. Then the growth requirement of recorded plants was studied based on literature. This study shows only 21 species of 33 plants species that used by bird are suitable growing in Gedebage. Based on this research, we recommend 21 species of plants that are suitable to be planted in Gedebage that can increased number of green open space and also attract birds so that the diversity of birds in Gedebage can be increased. The results of this study can also be applied in areas with similar physical conditions to Gedebage.
Application of various source animal manure and dosage on the growth and yield Phaseolus vulgaris L.
Authors: Taofik A , Frasetya B , Kusmana A
Published: March 2021

Animal dung in Indonesia has many types; each type of manure gives different plant growth response. This study aims to determine the type of manure and its adequate dosage to increase the growth of bean plants. The research has been carried out in the experimental field of Universitas Padjadjaran, Jatinangor, Sumedang-West Java with altitude 753 m above sea level (asl). The study used a factorial randomized block design. The first factor is the type of manure (k1 = cow manure, k2 = sheep manure, k3 = chicken manure, and k4 = rabbit manure) and the second factor is the dose (d1 = 10 t ha−1, d2 = 20 t ha−1, and d3 = 30 t ha−1). Each unit was repeated three times. The growth parameters observed were plant height, dry plant weight, number of pods, and pod weight per plant. The data from observations were then analyzed using analysis of variance at 5% significance level and then followed by Duncan’s test at 5% significance level. The results showed the application of chicken manure 20 t ha-1 gives better growth results than other manure, but the type of manure at various dosage levels has not been able to increase the weight of pods per plant.
Relationship between distribution of phytoplankton with Cimanuk river water quality
Authors: Mulyani L S , Mardiani R , Ardiana C , Nurkamilah S
Published: March 2021

Plankton is the primary food source for aquatic animals so that these herbs have an important role for the aquatic ecosystem. Research conducted in April 2019 at Cimanuk River, Garut, West Java. Water quality is strongly influenced by the activity of sand mining, industrial waste, agricultural, and household waste so that quality is reduced. Water quality can be determined through the study of biological analysis with the use of bioindicators. Bio-indicators used is the aquatic biota phytoplankton. This research uses descriptive research with correlation method. The goal is to determine the relationship between the distribution of phytoplankton with the quality of its waters. From the results of the research produced distribution of phytoplankton that consist of: The abundance of phytoplankton (1,077-a trough hit-1710 individuals/l), the index of diversity (2,6014-2,9184), the index of evenness (0,8651-0,8797), and index of dominance (0,8912-0.9255 level). Based on the person correlation showed that the relationship between water quality (light intensity, brightness, current speed, wind speed) with the distribution of phytoplankton.
Utilization of solar power for support facilities in the evacuation area during natural disaster
Authors: Atamtajani A S M , Ramadhan J , Adiluhung H , Yudiarti D
Published: March 2021

Products with the use of solar power in evacuation activities and displacement of natural disasters are very rarely found. Solar cell products are usually used by people on a certain scale, for example in accessories or lifestyle products. However, technology using solar panels is less developed, especially in products whose orientation is for natural disasters. Many cases were found during the evacuation of natural disasters, including many constraints Electricity is often a problem in areas where refugees are displaced after natural disasters. The problem of wasteful diesel generator energy resulted in the absence of an effective source of electricity and lighting, besides that information or distribution of the area was still fairly slow due to the portable speaker system and even door-to-door announcements. The method used is by combining aspects of technology into a conventional product by providing features needed in the event of a disaster. The method approach using the X-Problem method consists of immersion, convergence, divergence, and product adaptation designed with an effective and efficient function focus approach. From these problems, an emergency lighting product and emergency wireless loudspeaker can be designed to be provided in each of the evacuation tents. It is expected that the design of the product designed has a very important role in the evacuation process that occurs in the disaster environment, especially in Indonesia. The role of the product in creating an evacuation environment situation is more conducive.
Removal of crude oil by Thiobacillus sp. and Clostridium sp. at various temperatures and concentration of pollutant in liquid media
Authors: Primadani I P P , Ratnaningsih R , Rinanti A
Published: March 2021

The activities of the petroleum mining industry in Indonesia have caused many problems by producing hazardous waste pollution that would produce dangers for plants, animals or human lives. One technique to recover environmental situation is through land farming technique. The purpose of this study is to overcome crude oil pollution in the environment by using biotechnology method through the process of enzymatic bioremediation. The parameters discussed to determine the optimal environmental conditions that provide the highest efficiency for Total Petroleum Hydrocarbon (TPH) degradation processes such as temperature with a variation of 25 – 45°C then the concentration of pollutants with a variation of 5% – 20%, and the contact time carried out in solid media with variations amounting to 3 – 21 days. After conducting research, research that produces the bacterium Thiobacillus sp. and Clostridium sp. under optimal conditions at 35°C with a pollutant concentration of 10% and a contact time of 14 days. Thus, it can be concluded that the bacterium Thiobacillus sp. and Clostridium sp. can set aside hydrocarbon compounds with a removal efficiency of 65%. So, this research needs to be done to study other physical parameters.
Restoration of soil contaminated by mine acid using Thiobacillus sp. and Clostridium sp. effective bacteria
Authors: Ozcar M C , Iswanto B , Rinanti A
Published: March 2021

The mining industry in Indonesia in recent years has grown rapidly, causes an emerging problem of environmental mine acid pollution on the land around the mining site. The most dangerous effect of mine acid is the high accumulation of metals in land re-vegetation. The method for recovering land contaminated by mine acid that used in this study is bioremediation using effective bacteria Thiobacillus sp. and Clostridium sp. The core of this research is to find optimum environmental conditions (contact time, pollutant concentration, and bacterial concentration) to degrade mine acid, which is that effective bacteria contacted with soil contaminated by mine acid under optimum environmental conditions with variations of time. The results showed that the optimum environmental conditions for effective bacteria to degrade mine acid were 48 hours contact time, 60% pollutant concentration and 40% bacterial concentration. The results of this study is the effective bacteria efficiently recover soil contaminated by mine acid within 48 hours as evidenced by an increase in pH from 2 to 6, a decrease in Fe content from 3.6 mg/L to 0.27 mg/L, and decreased Mn levels from 3.2 mg/L, to 0.31 mg/L.
Effort to increase off-season production and fruit quality of Siam orange (Citrus nobilis var. microcarva L.) through application of mycorrhizal inoculants and auxin
Authors: Astiari N K A , Sulistiawati N P A , Rai I N
Published: March 2021

The study was conducted in Belancan Village, Kintamani, Bangli, Bali, from February to October 2018 with the aim to study the effect of application of mycorrhizal inoculants and auxin to increase off-season production and fruit quality of Siam orange. This experiment used a randomized block design with 2 factors. The first factor mycorrhizal inoculant dosages (0, 50, and 100 g/tree), while the second factor auxin concentrations (0, 50, 100 and 150 ppm/tree), and repeated 3 times. The results showed that the interaction of mycorrhizal inoculant dose and auxin concentration did not significantly effect to all of observed variables. The dose of mycorrhizal inoculant 100 g/tree increased off-season fruit production and quality of fruits, which was reflected by increase number of fruits per tree (142.17 fruits), weight per fruit (96.00 g), weight of fruit per tree (13.53 kg), and total dissolved solids (14.10 %Brix), or an increase of 44.21%; 11.89%; 57.87% and 21.03% compared to without mycorrhizal inoculant (108.58 pieces; 88.80 g; 10.57 kg and 11.65 %brix). Concentration of auxin 100 ppm/tree increased off-season production and quality of fruits, reflected by the higher number of fruits/trees (155.22 fruits), fruit weight per tree (15.03 kg), weight per fruit (96.50 g) and total dissolved solids (14.43% brix), compared to without auxin i.e. 112.11 pieces; 10.44 kg; 84.66 g; and 11.15% brix. The significant result of this research was mycorrhizal inoculant dose of 100 g/tree and auxin in the form of IBA 100 ppm/tree proven fruit drop, increased off-season fruit production and quality of fruits of Siam orange.
Renewable pro-environmental and energy design of environmentally friendly behavior in Central Java
Authors: Hamiyati H , Nadiroh N , Neolaka A
Published: March 2021

Energy in Indonesia is increasing rapidly every year in line with economic involvement, and human growth that is getting more and more energy is not fulfilled every year. Indonesia is among the most energy users because of its population; this is what drives the government to accelerate the use of renewable energy such as solar. This is related to its use, which can help many people who live in cities and remote areas such as; Electricity in households, public facilities, offices, electricity is said to be the most environmentally friendly. This research was conducted in Central Java by using descriptive qualitative methods and using research and development (R&D) methods. The technique used in this study is a qualitative expressive analysis technique. The resultant solution is to be able to meet the increasing electricity needs of the community, the use of renewable energy in the city that does not hurt the environment. This research produces renewable energy that can be used as a solution to solving the electrical energy crisis at an affordable cost and can increase the independence of the community so that it does not depend on government electricity supply and improve environmentally-friendly behavior.
Genetic diversity and differentiation of cytochrome oxidase subunit I (COI) gene of Rasbora lateristriata bleeker in different habitat
Authors: Suryani S A M P , Wirawan I G P , Dwiyani R , Sritamin M
Published: March 2021

Rasbora lateristriatais a freshwater fish that has small size and schooling fish in the shallow river. This fish is called Nyalian by the people in Bali. The population ofRasbora lateristriatahas decreased at upstream in Sungi river that already lightly polluted. The genetic diversity ofRasbora lateristriatabased on the Cytochrome Oxidase subunit I gene as a marker will be detected in the upstream, branch river, middle stream and downstream of the Sungi river. The method that used is the polymerase chain reaction (PCR) with two primers are Fish-BCL (forward) and Fish-BCH (reverse) were followed by sequencing using the method of Sanger sequencing to obtain its nucleotide sequences. Genetic diversity was analyzed using Mega 5.2 version. Nucleotide composition ofRasbora lateristriataare Thymine 29.8%, Cytosine 25.8 to 26.2%, Adenine 26.0% and Guanine 18.5-18.6% with total nucleotide are 633 to 682. The branch of the river, middle stream and downstream which the genetic diversity of locus COI experienced a change of nucleotide at the sixth base, Thymine (T) is replaced with Cytosine (C). Substitution Thymine to Cytosine is occurring on a polluted part of the river that may be caused by the parameters of the water quality.
Wildlife awareness program on UI civitas to achieve life on land sustainability on campus
Authors: Kholis N , Widodo S , Pradipta E , Patria M P , Suryanda A , Bowolaksono A
Published: March 2021

Universitas Indonesia has a high diversity of animals, especially snakes and monitor lizards. The existence of snakes in the UI region is often found in areas with high civitas activity and cause conflicts with humans. This can be seen from the snake incident report data that is quite high from 2017 to 2019. To reduce the conflict, it is necessary to educate the community to raise awareness about the types and roles of snakes and monitor lizards in the ecosystem. Educational programs include conducting socialization, holding open classes about snakes, as well as training in handling snakes to the UI civitas. Based on the educational program that has been carried out, there has been a decrease in the number of snakes that have died as well as the demand for lizards catching in the range of 2017 to 2019. The most found snake is Southern Indonesian Spitting Cobra (Naja sputatrix).
Go Green program as an effort to enhance UI civitas awareness towards sustainable campus
Authors: Bowolaksono A , Kholis N , Wardani W K , Pradipta E , Lestari F , Patria M P , Priambodo R
Published: March 2021

Civitas activities in the campus environment both from lectures and other supporting activities can produce waste. The civitas lifestyle often influences the amount of waste produced, such as inefficient use of paper and disposable packaging. Civitas awareness related to the impact of the lifestyle on the waste generated needs to be increased to support a sustainable campus. Some ways that can be done are by conducting socialization, implementing regulations, and conducting waste sorting programs. Based on the efforts that have been made, the amount of waste generated in 2019 has decreased compared to 2018. This is influenced by the sustainable campus policies implemented at Universitas Indonesia which began to be applied at the end of 2018.
Indirect effect of pesticides utilization towards diversity of pollinator insects in chili plantation
Authors: Putra D , Susanti T , Risnita R , Kurniawan B , Ampa B
Published: March 2021

The contribution of insect pollinators to the ecology and production of food crops is threatened by excessive use of pesticides. Pesticides have an impact on reducing the presence of pollinators in agricultural land. The diversity of pollinators depends on food availability and habitat quality. This research emphasizes the diversity of insect pollinators by the application of pesticides in chili plantations in Muaro Jambi, Sumatra. Insect observations were conducted on April-May 2018 using the scan sampling method. Specimen collection is carried out from 08.00-16.00. Data analysis used Shannon-wiener diversity index (H’), Simpson’s index (D), and Pielou evenness index (E). The results of the study were 498 collected individuals consisting of 9 species. Apis melífera, Apis cerana, and Eurema hecabe are the most dominant insect pollinators. Whereas Apis mellifera showed two peaks of flower visitation (an intense first one between 08.00 until 11.00 a.m. and a second less intense one after 14.00 p.m.). Pollinator insect diversity index in the medium category. Our observations also show that the application of pesticides, anthesis and dehiscence to flowers as well as the activity of pollinating insects which together cause low diversity index values.
Spatial use deviation in Coastal Border Area (Case study: Tanjung Pasir Village, Banten, Indonesia)
Authors: Hidayat R , Wiranegara H W , Hendrawan D I
Published: March 2021

Coastal Border Area would prevent coastal erosion and protect the coast from activities that may interfere with or impair the functionality and sustainability. Tanjung Pasir is a coastal village that needs to be established as a coastal boarder area. This area is included in the local protected area which must function properly. Increase of activities has disrupted local protection functions such as abrasion and tidal floods. The purpose of this study is to identify activities that disrupt the function of the coastal boarder area as a local protection area in Tanjung Pasir Village. The research method used is descriptive method with a case study approach and cross section research design and analyzed by spatial techniques. The results of this study are the pond in segment 1 by 100%, protected area as a mangrove forest in segment 2 by 40%, in segment 3 of residential activities by 100% and in segment 4 of tourism and embankment by 100%. The protection function is only in segment 2. There is a mismatch between the land use plan with the Spatial and Regional Planning. Land use changes in segment 1, segment 3 and segment 4 cause disturbances in ecological and socio-economic aspects.
Fake news classification for Indonesian news using Extreme Gradient Boosting (XGBoost)
Authors: Haumahu J P , Permana S D H , Yaddarabullah Y
Published: March 2021

Fake news or commonly known as a hoax has become one of the most visible cybercrime. Hoax news dissemination harms the social community, such as raising hatred towards something both individuals and groups. This paper is to classify amongst hoaxes and valid news utilizing Extreme Gradient Boosting (XGBoost) method in this research based on Indonesian news. The dataset used is Indonesian news about Indonesia itself and the world from 2015 to early 2020. The study used 500 news data including 250 valid news and 250 hoax news, divided into 80% training data and 20% test data. The result of this study shows that the machine learning model created using XGBoost has an accuracy value of 89%, with the precision value of 90% and recall value 80%.
Performance evaluation of machine learning classification techniques for Diabetes disease
Authors: Emmanuel G , Hungilo G G , Emanuel A W R
Published: March 2021

Diabetes is a noncontagious disease where Diabetes of type two Mellitus is among the top five leading the cause of global death. Not knowing the status of patients leads to complications such as kidney neuropathy and retinopathy, eventually lead to death. Knowing the patient’s stand using machine learning techniques can assist in early treatment will be useful in lowering the burdens mentioned above caused by Diabetes. In this work, researchers focused on evaluating the patient’s status of Diabetes. In this study, the Cross-Industry Standard Process for Data mining (CRISP-DM) used as a research methodology of research. Where Support Vector Machine, Decision Tree, Naive Bayes used as a classification technique, the study aims to predict the patient status for optimizing the complication caused by Diabetes. The data set used for the model was retrieved from the Pima Indian diabetic database Diabetes Database (PIDD), which is obtained from the UCI machine learning database with 768 records in total. KNN algorithm can be made best with an accuracy of 76% for the condensed dataset with the nine attributes as identified from the comparison of the result of different models.
Implementation of Red5 Library for Preaching (Da’wah) live streaming application based on Android
Authors: Irfan M , Muin A , Afif M , Pratama M F , Gumilar S
Published: March 2021

Mobile-based technology makes it easy to share information. One of the information content that was shared was Preaching (Da’wah). Currently, Da’wah content is spread by mainstream streaming media and social media, so Da’wah content is mixed with other information. Another problem is the lack of verification of Da’wah content. Therefore, a mobile-based application using the Android platform is required to use the Red5 library that works for live streaming. Besides, the function of the Red5 Library is to provide video conferencing services on the android platform, so Da’wah content can be recorded and shared in real-time, fast, and can be accessed by more than 1 user at the same time.