bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of temperature and concentration of Aspergillus fumigatus on chlorpyrifos removal
Authors: Anggreini C D , Tazkiaturrizki T , Rinanti A 
Published: December 2019

Abstract
Chlorpyrifos is a toxic organophosphate type of insecticide with a molecular formula of C9H11Cl3NO3PS. Bioremediation is an environmental friendly method used to combat this insecticide through microbial enzymatic activity. This study therefore aims to eliminate chlorpyrifos with temperature variations and concentrations of Aspergillus fumigatus. Aspergillus fumigatus fungi acts as bioremedian to degrade the activity of chlorpyrifos using temperature ranges of 25-35oC at a 0.5-1.5% concentration rate. However, using the Gas-Chromatography Mass Spectrometer (GC-MS) method, optimum chlorpyrifos degradation was achieved at 25oC with a 1.5% concentration for 5 days in potato dextrose broth (PDB) liquid media. This shows that A. fumigatus has the ability to remove chlorpyrifos with an efficiency of 95.92% from its initial concentration of 80 ppm.
Efficiency of constructed wetland using vetiver plant (Vetiveria sp) to reduced BOD and COD Concentration in greywater
Authors: Wasita D H , Hadisoebroto R , Fachrul M F 
Published: December 2019

Abstract
Constructed wetland is engineered, man-made ecosystems as a wastewater treatment unit to reduce water pollution by using plants. The purpose of this study to know the efficiency of Sub-Surface Flow constructed wetland with Vetiveria sp. in domestic wastewater treatment and to reveal the effect of aeration and detention time to reducing BOD concentrations in domestic wastewater. The research has been conducted in a constructed wetland located in Srengseng Sawah Village of continuing aerated reactor and without aeration as a control reactor. Detention time (days) 2 and 3 ware setup, then the sample was taken for BOD concentration. The results indicated that constructed wetland with aeration and detention time 4 days had a higher performance to remove BOD up to 90% than without aeration and less than 4 days’ process. These results fulfil the requirement of the quality standards of the Decree of DKI Jakarta Governor No. 122 of 2005 and Decree of the Minister of Environment No. 112 of 2003.
Effect of Soluble Soybean Polysaccharides (SSPS) concentration and SSPS/PVA ratio on characteristics of biodegradable plastic
Authors: Yusmaniar Y , Syafei D I , Arum M , Arfiansya R , Handoko E , Kurniawan C , Budi S , Yulianti E 
Published: December 2019

Abstract
This study aims to determine the effect of Polyvinyl alcohol (PVA) and Soluble soybean polysaccharides (SSPS) and to characterize it (water resistance and biodegradation test). This research was done by blending (mixing) PVA, SSPS, acetic acid, and maleic anhydride. From the results of infrared spectrum analysis on plastic films showed peaks in the area 1000-1100 cm-1 which indicates the absorption of polysaccharides. This plastic has an optimum water resistance in the ratio between 1:1 w/w (SSPS: PVA). Optimum biodegradation test results in the ratio of 1:1 w/w (SSPS: PVA). Based on the result of the research, it can be concluded that water resistance and biodegradation reach optimal on composition 1:1 w/w (SSPS: PVA).
Geomorphological impact of Palu earthquake
Authors: Anugrahadi A , Sumotarto U , Purwiyono T T 
Published: December 2019

Abstract
Sulawesi and Maluku islands are tectonically under a collision area of four earth crust plates, those are Eurasia, Philliphines Islands, Pacific Ocean and Australian-India Ocean. Palu city in Central Sulawesi island in particular is geologically an area of complex structure. A fault zone of north-west to south-east direction has formed Palu area as a block being squeezed by Palu-Koro strike-slip fault zone. The aim of this research is to know the impact of earthquake happened on October 28, 2018 has caused the fault to activate of being dynamic movement of the area. Using hand camera photos, a morphological survey and analysis show the landslides and slumps could be clearly identified. Rock and soil slide and movement was also strengthened by liquefaction of hydrological fluid content within the Palu block. Morphology of Palu-Koro fault plane was also affected significantly causing landslides and slumps on the fault plane exposed in the earth surface.
Comparison between moving windows statistical method and kriging method in coal resource estimation
Authors: Marwanza I , Nas C , Azizi M A , Simamora J H 
Published: December 2019

Abstract
The calculation of coal resource estimation is generally done by a conventional and nonconventional method. This research uses a nonconventional method of Moving Windows Statistical (MWS) and Kriging using 3-dimensional calculation boxes area with dimensions of 100 m x 100 m, 200 m x 200 m, and 300 m x 300 m, which is processed using MWS and SGems software. The desired value is the comparison of average coal thickness value produced from basic statistics, Inverse Distance Squared (IDS), and Kriging, and also the estimation of coal resources. By using MWS, the obtained average value of coal thickness for area 100 x 100, 200 x 200, and 300 x 300 are 6.40 m, 6.24 m, and 6.03 m, respectively. From IDS the value from 100 x100 box is 6.38 m, 200 x 200 is 6.16 m, and 300 x 300 is 5.94 m, while the calculation of Kriging using Sgems generates 5,77 m of coal thickness in 100 x100, 5.68 m in 200 x 200, and 5.8 m in 300 x 300. Coal resource estimations using these three different areas of the box have also been carried out, resulting 943,480 tons, 526.460 tons, and 327.450 tons of coal in 100 x 100, 200 x 200, and 300 x 300. In the comparison of the average value of coal thickness between values determined from basic statistics, IDS, and Kriging on each area it is found that the value did not change significantly but the value from the Kriging method is the most accurate because of the influence of spatial variation of data where one point with the other point influences each other.
Neutralization, coagulation and filtration process in peat water
Authors: Parabi A , Christiana R , Octaviani D , Zalviwan M , Noerhartati E , Muharlisiani L T 
Published: December 2019

Abstract
The research purpose is to find out about neutralization, coagulation and filtration processes in peat water. Water is an environmental component that has a considerable role and the requirements in terms of quality and quantity. This research method uses experimental design and the variables are the processes of neutralization, coagulation, and filtration of peat water. Descriptive statistical analysis is an analysis carried out to assess the characteristics of a data. The results of the research were from the initial test obtained pH = 4.32. There are some changes from all parameters starting from dark black water colour (1088 PtCo) to 179 PtCo, high turbidity (13,2 NTU to 6,55 NTU, high iron content (1,68 mg/L) to 0,26 mg/L, high chromium (0,093) mg/L to 0,023 mg/L), low acidity (pH) (4,32) to pH 5,57 and high sulphate (744 mg/L) to 24 mg/L. The conclusion is that the results of processed Rasau Jaya Umum village peat water is feasible in accordance with the quality standards of the Regulation of the Minister of Health of the Republic of Indonesia No. 492/MENKES/PER/IV/2010, that the levels of iron, chromium and sulfate are already at a value permitted, but the turbidity of the water is still high and the pH of the water shows that the water is still acidic, amounting to 1080 PtCo. Therefore, water variations in the amount of material used in the peat water installation process still need to be improved in order to obtain maximum results.
Utilization of rice wastewater as an alternative medium for growth and quality of Shiitake mushrooms (Lentinula edodes)
Authors: Setiati Y , Chaidir L , Saputri A , Roosda A A 
Published: December 2019

Abstract
Multiplication of Shiitake (Lentinula edodes) as a pure breeding commonly uses Potato Dextrose Agar (PDA) as the medium. Further, the cost of its basic material, which relatively expensive needs an alternative medium to produce pure brood stocks for Shiitake and to reduce the cost of producing pure brood stocks such as utilizing rice wastewater. Rice wastewater known to have composition as complete as PDA. The research aimed to find the utilization of rice wastewater as Shiitake mycelial growth medium and determine the best concentration of rice wastewater medium on the growth rate and quality of Shiitake mycelium. The research used an experimental with descriptive analysis method consisting of 11 treatments of rice wastewater concentration i.e. 50%, 55%, 60%, 65%, 70%, 80%, 85%, 90%, 95%, 100%, and PDA as the control, all treatments were replicated three times. The results showed that various concentrations of rice wastewater affected on the growth rate of Shiitake mycelium. The concentration of 100% rice wastewater produced the best growth and quality of mycelium compared to other treatments. Therefore, the rice wastewater can be used as an alternative medium to multiply pure broodstocks of Shiitake mushrooms.
Nutrient fulfilling status for bali cows in Bali, Indonesia in season differences
Authors: Sudita I D N 
Published: December 2019

Abstract
This study aims to determine the number of nutrients given in feed for Bali cows in different seasons. The study used a survey method through observations on 27 livestock groups in Bali by measuring the amount of feed given, diversity of feed ingredients, and sampling of feed ingredients for analysis. Measurements were made on three season (the rainy, mid-dry, and the peak of the dry-season). The results showed a decrease in the type and diversity of feed ingredients in the ration, while the amount of ration given (kg/day of fresh weight) was almost the same (33.17 kg, 33.15 kg and 32.82 kg). The total protein available in the ration was decreased in the rations given, namely: 706.52 g (rainy season), 648.65 g (mid-dry season), and 611.37 g (peak dry season). While the total energy tends to increase according to successive seasonal changes: 12,650.7 kcal ME, 13,820.18 kcal ME, and 13,974.21 kcal ME. From this study, it can be concluded that although there is a decrease in the type and diversity of feed ingredients in the rations given to Bali-cows according to the season in Bali, but the amount of protein and energy above the basic livelihood needs of livestock.
Microplastic abundance in the water, seagrass, and sea hare Dolabella auricularia in Pramuka Island, Seribu Islands, Jakarta Bay, Indonesia
Authors: Priscilla V , Sedayu A , Patria M P 
Published: December 2019

Abstract
This research focused on the amount of abundance of microplastics in the sea hare Dolabella auricularia as well as the seagrass fields along the southern coast of Pramuka Island. Sampling of 8 individuals of Dolabella auricularia along with seagrass Cymodocea rotundata leafblades was done at the southern coast of Pramuka Island, after which the samples were preserved and brought to a laboratorium in Depok for microplastic analysis. The sea hares’ digestive tracts were extracted and dissolved in strong nitric acid. A 1 cm2 portion of a seagrass leaf blade was cut for observation. Prepared samples were observed under a monocular microscope and further analysis was done. Microplastic fibers and film particles were found in highest abundance within the digestive tracts of each sample of Dolabella auricularia as well as on the seagrass surface where the sea hare obtains its algae from, with fragment particles found in much lower amounts. Overall, number of microplastics was found between 40.1 to 73.7 particles/g weight of sea hare digestive tract and the estimated amount of microplastic found at seagrass leafblade was 185 particles/cm2. Results provide evidence that microplastics in the ocean brought by water currents could adsorb on to algae through which it enters the food chain as it is consumed by marine biota.
Training and development of Internet of Things creative industry entrepreneurship models for UPI students
Authors: Hasan B , Hasbullah H , Purnama W , Kustiawan I 
Published: December 2019

AbstractToday the development of electronic technology has reached the generation of the Internet of Things. IoT is a collection of objects (things), in the form of a physical device (hardware) that is able to exchange information between sources of information. The development of creative industries through IoT is expected to be a solution to keep entrepreneurship among students who will contribute to economic development. This Entrepreneurship PKM Activity was attended by 35 students from various study programs in the environment of DPTE FPTK UPI, and they followed this activity carefully starting from the stages of preparation, implementation, apprenticeship to the partner industry until the evaluation stage. Various innovative creations that combine technology with IoT utilization have been generated from the results of training activities, including, Smart Home, Automatic Glass Mixer With Blynk, Smart Building and Motor Controller. It is finding the future challenges and the existence of these business opportunities and as an effort to develop entrepreneurship in the field of information technology, especially those based on creative industries through the use of the Inetet of Things for UPI students, this PKM activity is one means to realize economic growth both locally, regionally and internationally.
Performance analysis of Light Emitting Diode, High Sodium Pressure and Metal Halide Lights
Authors: Hamas I M A , Abdullah A G , Hakim D L 
Published: December 2019

Abstract
Light Emitting Diode (LED) lamps have been widely applied to street lighting in every country, but not a few still using conventional lamps like High Pressure Sodium (HPS) and Metal Halide (MH). This research presents the results of evaluating efficiency and photometric performance from street lighting lamps. The level of illumination and uniformity ratio will be calculated to make a quantitative comparison between LED lights and conventional lamps according to Indonesian National Standards. Research carried out on three different Street Lightings in Bandung with three different lights specification. Conditions in the field will be simulated using DIALux software. The results of this research are obtained that LED lamp is the most effective and efficient type of lamps compared with conventional lamps. This Research will be useful for the Public Works Agency in making decision on the selection of the new lamps technology for street lighting, determining the type of lamp should depends on needs and light quality.
The prototype of SCADA application in the school building
Authors: Ikhsan A F , Rukmana A , Suarsa A C , Masykur M , Wiharso T A 
Published: December 2019

Abstract
The complexity of electrical installation in a building will depend on the function or operation of the building in question. On the other hand, power supply is very important to support the building operation. However, it is very often difficult to locate which point in the power distribution system that experience electrical fault. This study attempts to solve such problem by designing a prototype of monitoring and controlling system of power distribution in school buildings. To this end, we use Arduino-based system and Wonderware InTouch for the user interface. This study resulted in a power monitoring system consisting of voltage sensor and electric relay connected to Arduino ATMEGA 2560. The system can be configured, monitored and controlled through a computer software.
Design and implementation of planar phase shifter for radar at frequency 2.9 GHz – 3.1 GHz as beam-steering
Authors: Hamidi E A Z , Arifin A I , Soedarsono S , Siddiq S F 
Published: December 2019

Abstract
Nowadays in Indonesia, 3D Radar has been developed to perform a vertical scanning that has multi-functional benefits in telecommunication industry and defence. As a common practice, 3D radar system is frequently used to measure the distance of an object like the aircraft. Therefore, the most important element in radar systems is the phase shifter that has a main role in steering the beam and replacing the rotator function. This final research will focus on the operation of simple Phase Shifter with concerning a 2,9 GHz – 3,1 GHz radar frequency. Phase shifter designed at 3 GHz as the centre frequency within a value return loss ≤ -15 dB, insertion ≥ -4 dB, coupling ≥ -4 dB, isolation ≤ -15 dB, phase difference 45°, 90°, 135°, phase error ≤ 15°, and realized by converting into Microstrip Quadrature Hybrid Coupler 90°. These particular phase shifter uses the type of substrate Rogers R04035B with dielectric constant values (εr
) at 3,48, and the thickness of the substrate ( h ) of 1,524 mm. Simulations are performed using Computer System Technology ( CST ) software suite 2015 and assigned the average results each port to return loss value -37,290519 dB, insertion -3,154242 dB, coupling -3,164594 dB, isolation -32,714140 dB, with phase difference 45,00816°, 89,09566°, 90,76276°, 134,85057° and phase error 0,00816°, 0,90434°, 0,76276°, 0,14943°, It is then subsequently realized and measured by Netwotk Analyzer and return loss -30,078370 dB, insertion -3,229792 dB, coupling -3,146129 dB, isolation -42,651590 dB, phase difference 45,15190°, 86,38080°, 93,38538°, 134,36260° and phase error 0,15190°, 3,61920°, 3,38538°, 0,63740°.
The prototype of automatic garbage carrier from a small scale drain using Arduino Uno
Authors: Wiharso T A , Susilawati H , Yahya M A 
Published: December 2019

Abstract
As the downpour keeps coming continuously, overflowing water is emerged from a small scale drain due to the garbage that clogs the culvert on the drain. The purpose of this research was to overcome or reduce the incidence of the overflowing water on the culvert. The method used in this research was the prototypinmethod using microprocessor of Arduino Uno and load cell sensor. The results achieved in creating this system had already facilitated the transport of garbage and automatically detected full garbage. Therefore, this could reduce the amount of garbage located on a small scale drain and the risk of occurrence of overflowing water. This prototyping could be used for large scale in addition to the culvert.
The study of the wideband planar sleeve antenna
Authors: Rohadi E , Adzikirani A , Siradjuddin I , Rasyid A , Adhisuwignjo S , Darmawan Y , Amalia A 
Published: December 2019

Abstract
In this paper, the wideband planar sleeve antenna with two sleeves on the upper side and two sleeves on the bottom side are analyzed numerically. In the previous study, the wideband planar sleeve antenna is used at frequency 3.5 GHz. The purpose of this research is addressed to analyze the wideband planar sleeve antenna in the range frequency of 400-4000 MHz by using WIPL-D EM Simulator by adjusting the antenna parameter. The antenna upper sleeve, lower sleeve, the length of the antenna and the gap between the lower and upper sleeves are adjusted. The result shows that the wideband planar sleeve antenna is achieved. When the length of the upper sleeve is increased, the antenna will work at lower frequency but the return loss slightly reduced, the same effect occurred by increasing the lower sleeve size, but it doesn’t affect at the lower frequency. When the antenna length is increased, the return loss of the antenna is reduced. Furthermore, the distance between the lower and upper sleeve affects the return loss characteristic. This is indicated that by adjusting the length of the antenna parameter, the antenna is applicable for many systems, such as television system and the ISM system.
Design and analysis of a radiant charger using 5 coils and 5 poles of neodymium magnet as a rotor drive
Authors: Hidayat M N , Santoso R , Syamsiana I N , Setiawan A , Djulihenanto S 
Published: December 2019

Abstract
A radiant charger is a free energy device that can be applied to produce electricity. The term free energy means that this equipment does not use fuel, such as fossil fuel to produce energy. This research aims to design and analyze a prototype of a radiant charger using five coils and five neodymium permanent magnets. In this research, a primary battery is needed as a source to generate mechanical work to rotate the rotor, a coil and a transistor is also needed to charge a secondary battery before the primary battery runs out. The results of the design and testing of the device produces a rotor rotation of 1020 rpm at 346 volts.
Intermittent Renewable Energy Source (IRES) model of solar energy in Cipayung microgrid system
Authors: Tambunan H B , Pramana P A A , Munir B S 
Published: December 2019

Abstract
Indonesia has a great solar energy potential because its location is in a tropical area. One significant characteristic of solar energy is intermittent. Integration of intermittent renewable energy source (IRES) especially solar energy into electrical power grid can cause significant impact in power system stability. This study aims to model the IRES characteristic, profile, and time duration classification based on collected data in Cipayung microgrid system. The result shows the characteristic of IRES consist of two things, a sudden increase and suddenly decrease of solar source. These characteristic profile model is made by a polynomial and logarithmic regression analysis using mathematical equation. A condition where the availability of solar energy is immediately at a maximum or at a lowest point of zero has never been found. The very fast IRES classification occurs the most often with 0.5 to 1.0 minutes of time duration. System operator can use this information to prevent the system from collapsing and even having a blackout.
Fuzzy Maximum Power Point Tracking (MPPT) controller for photovoltaic system on mini greenhouse
Authors: Putri R I , Setiawan H , Irawan B , Yunus Y , Patma T S , Pradani E R K 
Published: December 2019

Abstract
Greenhouse is currently used is urban farming. Smart greenhouse technology allows farmers to monitor their plants easily. This system requires much electrical energy supply. In order to save energy, additional electricity supply is needed. For this reason, photovoltaic is installed on the roof of the greenhouse. The obstacle in the installation of photovoltaic cells is that the power produced is not optimal, due to the movement of the sun’s position. For this reason, Maximum Power Point Tracking (MPPT) technology is used. In this paper, fuzzy logic was used for MPPT based on I and V from PV. The aim is to find the maximum operating point of a photovoltaic module so that it can increase the output power ratio of photovoltaic modules in varying temperatures and radiation levels. Simulation is done using MATLAB, so that a ratio of output power ratios is generated with and without using an MPPT. By using the fuzzy MPPT controller, it produces optimum power, at P PV max = 250 W, P out max = 160 W, P PV max = 174.8 W, P out max = 125 W, P PV max = 98.97 W, P out max = 75 W. This power will be used to supply electricity for 2 15 W lamps, 12 volts for the mini greenhouse.