bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scaled-up production of 131I radioisotope using dry distilation method for radiopharmaceutical application
Authors: Chaidir P. , Daya A.S. , Indra S. , Fany T. , Ahid N. , Fernanto R. , Herlan S. , Anung P. 
Published: February 2022

Abstract
The development of nuclear medicine is increasing every year, including the need for diagnostic or therapeutic radioisotope sources. Iodine-131 (131I) radioisotope is used for diagnostic and therapeutic purposes in patients with thyroid cancer or neuroblastoma. Research and Technology Center for Radioisotope and Radiopharmaceutical - National Research and Innovation Agency (RTCRR-NRIA) has been able to produce 131I radioisotope with radioactivity up to 18.5 – 29.6 Gbq/month. This study aims to scale-up the production capacity of 131I radioisotope by using dry distillation method and to determine the radionuclide and radiochemical purity of the 131I radioisotope. The scaled-up production of 131I radioisotope was carried out in a hot cell facility of Radioisotope and Radiopharmaceutical Laboratory (RRL). 50 grams of TeO2 was used as target material. The TeO2 was irradiated at the Central Irradiation Position (CIP) facility at G.A Siwabessy multipurpose reactor. The post-irradiation target was heated up to 800° C for ± 5 hours under a vacuum condition in the distillation system of -2 incHg to -3 incHg. In this study, the 131I radioisotope was produced with radioactivity of 192 – 344 Gbq/month, radionuclide purity of 99%, and radiochemical purity of 95%. The scaled-up production 131I radioisotope has been successfully carried out with an increase of more than 12 times the initial capacity. In the future, the production of 131I radioisotope will be used for domestic needs in the oral dosage form.
Influence of heating and cooling rates on thermodynamic properties of aluminum thin film from 300 to 1100 K
Authors: Fahdiran Riser , Sugihartono Iwan , Delina Mutia , Prayitno Teguh Budi , Sunaryo  , Budi Esmar 
Published: February 2022

Abstract
Temperature and pressure evolution due to heating and cooling in the range of 300 to 1100 K of Aluminum thin film with thickness 10 nm were investigated based on Molecular Dynamics (MD) simulation. Pressure evolution shows that heating and cooling rates with comparison of 3:2:1 provides significant contribution on melting and recrystallization of the system. The oscillation of the pressure is the strongest at the highest heating rate which indicate that the system collapses stronger than the lower rate. It is responsible for the destruction of the structure correlated to the elevation of the temperature. While for recrystallization, the analysis on pressure oscillations confirmed the influence of the rates. Analysis based on local crystal structure indicated that at T = 1100 K, all the systems are melted.
Thermodynamic and structure properties of aluminum nanoparticle due to heat treatment: a molecular dynamics study
Authors: Susila Anggara Budi , Handoko Erfan , Budi Agus Setyo , Nasbey Hadi 
Published: February 2022

Abstract
Thermodynamic and structure evolution of Aluminum nanoparticle with diameter of 10 nm are investigated due to heat treatment by means of stepping heat and compared it to sudden heat. Molecular Dynamics (MD) simulation is employed to track the trajectories of each atom and its surrounding to define thermodynamic properties, e.g., temperature and pressure. The temperature evolution gives clear different profile for both cases, while pressure profile strongly evident different mechanism of melting. From thermodynamics point of view, the nanoparticle suffered different final state for both heating methods. Structure analysis later confirmed that for stepping heat the nanoparticle is melted while for sudden heat it is only partially melted.
Mitigation of soil resistivity using composition of zeolite, NaCl, and charcoal
Authors: Hardi Surya , Kristian Alberto , Hasibuan Arnawan , Nasution Azwar , Alfhisyari Milli 
Published: February 2022

Abstract
The grounding resistance value is directly proportional to soil resistivity. The resistance value is better as low as possible for the equipment body grounding. The purpose is to provide a path of the short circuit current flows to the ground as protection and safety personal and also the equipment. The soil resistivity great is influenced by moisture and substance content in the soil. The highland soil and rocky soil commonly are poor the soil resistivity. Transmission line towers can be not avoided through the highland region. To reduce the soil resistivity value can widely be carried out by addition low material resistance (LMR) or LMR composite other materials. This research, to mitigate the value of the soil resistivity can be carried out by addition low material resistance (LMR) Zeolite composite with NaCl, Charcoal, and Soil. Various compositions of the LMR, NaCl, and Charcoal were used to find the lowest grounding resistance at certain depth. The three-point method was used to measure the grounding resistance value. The research result gives information that best composition is 90% Zeolite, 5% NaCL and 5% charcoal for the rod depth of 1.2m, the resistance decrease from 94.3Ω down to 5.3Ω (94.4%). The LMR Zeolite is dominant influence to reduce the grounding resistance.
Antibacterial textiles which impregnated silver nanoparticles prepared via green synthesis by Fusarium oxysporum BNT-02
Authors: Rohaeti Eli , Nanda Annisa Amalia Sultan , Yunita Isti , Suwardi  
Published: February 2022

Abstract
Silver nanoparticles can be prepared by using a microorganism. The objectives of the study were to determine the ability of Fusarium oxysporum BNT-02 in reducing silver nitrate solution to silver nanoparticles, to evaluate the effect of variations in treatment of textile materials toward antibacterial activity of textile materials impregnated with silver nanoparticles on Staphylococcus aureus ATCC 25924 and Escherichia coli ATCC 35218. In this study, silver nanoparticle were obtained by reducing the AgNO3 solution by F.oxysporum BNT-02. Coating of silver nanoparticles on textile materials was carried out by inserting sterile textile material into silver nanoparticle and shaking then drying. The textile material modified with silver nanoparticles was characterized for antibacterial activity against S.aureus ATCC 25924 and E.coli ATCC 35218. The inhibition zone to determine antibacterial activity was observed every 6 hours for 48 hours of incubation time. The inhibition zone data was analyzed using ANCOVA and t-test. The results showed that F.oxysporum BNT-02 can be used as a reducing agent for producing silver nanoparticles. The textile material coated with silver nanoparticles had antibacterial properties against S. aureus ATCC 25924 and E. coli ATCC 35218. Antibacterial activity of textile materials coated with silver nanoparticles on S.aureus ATCC 25924 showed a larger inhibition zone than E.coli ATCC 35218.
Mitigation of voltage sags in distribution line system using static VAR compensator and static synchronous compensator
Authors: Hardi Surya , Marpaung V. , Hariadi I. Nisja , Rohana  , Nisja I. 
Published: February 2022

Abstract
Voltage sag is one of the power quality disturbances most frequently by customers because it can cause economic loss for the customers especially industries and commercial customers. The main source of voltage sags are faults in transmission and distribution beside two others namely motor large starting and transformer energizing, both the voltage sags have less effect on the equipment. Voltage sags can cause degradation performance of the equipment, and it depends on the magnitude and the duration. The voltage sags that occur in the power system can be compensated with installed Static VAR compensator (SVC) and Static synchronous compensator (STATCOM) in the distribution system bus. The purpose of the study is to compare both types of the device used to mitigate voltage sags in simulation using Alternative transient program (ATP) software. The voltage sag results from the short circuit faults. The method proposes the installation of the two compensator devices alternatively at one of the IEEE thirteen busses systems. The result shows the STATCOM is better than the SVC to handle mitigation of voltage sags compared with the SVC.
Synthesis of silica particles through conventional sol-gel and sonochemistry methods and the effect of catalyst, water concentration and sample environment to the particle size
Authors: Kamila R , Ridwan  , Akhir M P M , Patriati A , Insani A 
Published: February 2022

AbstractVarious methods have been carried out in an effort to obtain SiO2(Silica) particles with relatively the same grain size distribution and a uniform shape. This fine Silica particle size will be useful in the formation of SiC in the next stage. In this works, Silica particles has been synthesized through two different methods: conventional sol-gel and sonochemistry (using ultrasonic probe). Silica was synthesized by mixing TEOS, ethanol, ammonia, and D.I water with the molar ratio of 1 : 75.9 : x : y respectively. In sol-gel method, x was varied with 2.85, 5.7, and 8.54 M while y was fixed at 61.6 M. In sonochemistry method, y was varied with 6.69, 12.3, and 75.9M while x was fixed at 2.85 M Additional variation of sample environment including with and without ice has also been done in sonochemistry method. Amorphous phase was found in all samples from the XRD profiles. FT-IR results showed that the IR spectral peaks of all samples match the FT-IR spectrum of SiO2with symmetric and asymmetric stretching mode of Si-O functional groups at 802 – 810 cm−1and 1093 – 1103 cm−1wavenumber. SEM images indicated that the average of SiO2particle size tends to increase with the higher amount of ammonia concentration used and lesser concentration of water used results in smaller particle size. The influence of sample environment in sonochemistry method showed an interesting phenomenon where a lot of small particles sticked with bigger particles.
Evaluation and development of wireless monitoring systems for an autonomous sailboat
Authors: Setiawan J D , Ihsan M S , Saputro R , Munadi M , Paryanto P , Alimi S 
Published: February 2022

Abstract
In this study, the performance of the Long-Range (LoRa) communication and 3DR Radio Telemetry modules was evaluated. The suitability of these two communication options was assessed for the application on an autonomous sailboat prototype. The communication range and power consumption of each module are the primary factors for selection. The test results found that LoRa technology can send data stably with a range of up to 10.5 km, while the 3DR Radio Telemetry module can only send data stably up to 300 m. The LoRa technology consumes 9.56 Wh of electrical energy per day for the autonomous sailboat application, while the 3DR Radio Telemetry consumes 11.07 Wh of electrical energy per day. It was decided that LoRA technology would be implemented on the autonomous sailboat.
Mechanical properties of polyethylene matrix composites with areca fruit peel powder filler (Areca catechu) and sugar cane fiber (Saccharum officinarum L)
Authors: Nurfajriani  , Herlinawati H. , Yusuf M. , Siregar M.I. , Yunus M. , Derlina  
Published: February 2022

Abstract
Utilization of betel nut peel waste and sugarcane fiber has not been maximized so that the purpose of this study was to determine the characteristics of the mechanical properties, tensile strength and bending strength of the polyethylene matrix composite with betel nut peel powder and sugarcane fiber filler. In this study, the variation of the ratio of the volume of fiber used is: (0%: 10%), (10%: 0%), (5%: 5%). The fibers used previously were modified with 2% NaOH treatment for each fiber. The results for the tensile test were the variation of 10% sugarcane fiber was 34.876 MPa, 10% variation of areca nut husk powder was 28.109 MPa, 5% variation of areca nut peel powder and 5% sugarcane fiber was 12.104 MPa.
Pineapple leaf fiber (PALF) waste as an alternative fiber in making concrete
Authors: Karolina Rahmi , Tandika William , Hasibuan Azhari , Agung Putra M. , Fahreza Devi 
Published: February 2022

Abstract
Indonesia is the 9th largest pineapple producer in the world with a production of 1.39 million tons per year. this makes the pineapple leaf fiber (PALF) waste available abundantly in Indonesia. Palf waste has not been widely used in Indonesia. palf is usually used as fabric for textiles or yarn to be used as clothes and as handicrafts. palf has excellent mechanical properties and is environmentally friendly. in this study palf is used as a material for construction. Adding fiber to the concrete mixture is one way to minimize cracks in the concrete. This study aims to increase the compressive strength, tensile strength of concrete and utilize palf potential as construction material. This study compares the compressive strength and tensile strength of normal concrete against compressive strength and tensile strength of concrete with the addition of pineapple fiber with variations of 0%, 0.5 %, 1%, 1.5% to the weight of cement. The specimen used was a cylinder with a diameter of 15cm and a height of 30cm. The test is carried out on specimens with the age of 28 days. Experimental results show that inclusion of Palf improves the split tensile strength and compressive strenghth of concrete.
Synthesis and optical properties of Sb-doped ZnO thin film by sol-gel spin coating method
Authors: Siregar Nurdin , Sirait Makmur , Motlan  
Published: February 2022

Abstract
Sb-doped ZnO thin films had been successfully synthesized by the sol-gel spin coating method. The results of XRD analysis of ZnO and Sb-ZnO thin films showed a hexagonal wurtize crystal structure with crystal sizes of 21,251 nm and 11.265 nm, respectively. The results of SEM analysis showed that the grain size distribution of the crystallites was round and uniform, compactly covering the substrate and almost no porosity. The percentage of Sb concentration based on EDS analysis was 3.02%. UV-Vis analysis results showed the absorbance and transmittance values of Sb-ZnO thin films were higher than the transmittance values of ZnO thin films. The energy band gaps for ZnO and ZnO:Sb thin films were 3.20 eV and 3.30 eV, respectively.
The development of android-based mathematics learning application
Authors: Sinambela Pardomuan Nauli Josip Mario , Simanjorang Mangaratua Marianus , Manurung Nurliani , Simanullang Michael Christian 
Published: February 2022

Abstract
The purpose of this research was to produce an android based mathematics learning application. This research was motivated by the Indonesian government’s policy during the covid-19 pandemic. The government asked people to do all their activity from home. The government’s policy changed all the system including the learning activity system. Based on that, it was necessary to develop a learning application, which would enable students to learn from home. In this research, the learning application that would be developed was an Android based mathematics learning application. The research method used for this purpose was the development research developed by Dick and Carey. The quality standard used for the Product developed in this research were validity, practical, and effective, which was checked based on expert validation and trial results.
Development of science experiment media kits for elementary school students
Authors: Koswojo Jane , Wirjawan Johannes V.D. , Herwinarso  
Published: February 2022

Abstract
The essence of the current science curriculum (aka curriculum 2013) nationally applied in all elementary schools is scientific approach to improve the students’ skills and knowledge. Based on our need analysis we found that Mechanical experiment series are highly needed. The main goal of this study is to produce media kit for science experiment activities for elementary school students. The media kit consists of experimental tools kit and their experimental guide modules. We applied the 4-D model to achieve the goal. This study is on-going process; this article reports the progress status of the study.
Solar photovoltaic application for electric vehicle battery charging
Authors: Sinuraya Arwadi , Sinaga Denny Haryanto , Simamora Yoakim , Wahyudi Ridho 
Published: February 2022

Abstract
Increasing fuel consumption and limited fossil fuel reserves make us need energy sources that come from Renewable Energy Sources (RES). Solar Energy Resources (Photovoltaic systems) are very strategic to be used in supplying energy to Electric Vehicles (EVs) which generally use BLDC electric motors as wheel propulsion. Photovoltaic cells are components in solar panels that convert solar energy into electricity. The solar panels mounted on the roof of the vehicle work best during the daytime. When at night, electric vehicles will work using electrical energy that has been stored in the battery. This study aims to design a battery charging system using photovoltaic technology which is used to supply power to drive BLDC electric motor in electric vehicles.
Phytochemical screening and secondary metabolites toxicity test from toba frankincense leaf (STYRAX paralleoncomud PERK)
Authors: Sitorus Marham , Silaban Ramlan , Susanti Nora , Manurung Ruth Natalia 
Published: February 2022

Abstract
The secondary metabolites of Toba frankincense leaf (STYRAX paralleoncomud PERK) have been isolated by maceration with n-Hexane, Ethyl acetate and Ethanol as solvents. The results of phytochemical screening of secondary metabolites in n-hexane extract were high amounts of flavonoids and steoids and low amounts of saponins and tannins, ethyl acetate extract were steroids and tannins in large amounts, moderate amounts of flavonoids and small amounts of saponins and extracts. ethanol, saponins and tannins in large quantities and small amounts of flavonoids. Alkaloids and terpenoids (essential oils) were not detected in the three extracts. It was concluded that the secondary metabolites in incense leaves were: flavonoids, saponins, steroids and tannins. Toxicity test of the three extracts was carried out using the Brine Shrimp Letality Test (BSLT) method with Arthemia salia Lech as a bioindicator with concentration variations: 10, 100, 500 and 1000 ppm. The test was carried out with three repetitions with 40 larvae of Arthemia salia Lech each. Toxicity test results obtained Inhibition Concentration ( IC50 ) of n-hexane extract was 1350.95 mg/L (non-toxic), ethyl acetate extract 18.98 mg/L (very toxic) and ethanol fraction 41.20 mg/L (moderate toxicity). Thus the secondary metabolites in the ethyl acetate extract are very potential as drug candidates, while the metabolites in the ethanol extract are quite potential.
Community constraints analysis in the use of solar power plants in Indonesia
Authors: Mendoza M D , Hutajulu O Y , Salman R 
Published: February 2022

Abstract
The Solar power plant is one of the alternative sources of electrical energy that is part of Indonesians national energy mix plan in Indonesia. The use of rooftop solar power plants became one of the programs proposed by the government to fulfill the plan. The problems found from this research are many that encourage factors to make prospective rooftop solar power plant users in Indonesia use this power generation. Because as we know, these systems are high costs and skill is needed to calculate the capacity. Data collection will be carried out by surveying the solar panel enthusiast community and potential solar power plant users then the data obtained will be processed using a path method to see what encourage factors that have a high effect on user decision to use rooftop solar power system for their household electrification. The data obtained from these results will be used as a reference to support the implementation of the government program to run smoothly. The result shows that competence and benevolence are two driving factors that have high effect on people decision to use solar panel systems. Therefore, the government can take advantage of these two factors to increase public enthusiasm for using solar power system to achieve the target.
The implementation of plyometrics circuit model to increase jump power
Authors: Marpaung Deni Rahman , Sari Rima Mediyana 
Published: February 2022

AbstractThe purpose of this study was to determine the difference in the effect of plyometrics circuit model based on the analysis of vertical jump movement on the increasing of jump power. This study used an experimental method consisting of two variables, namely the manipulative independent variable (exercise model) and the dependent variable (jump power). The research design was one group pre-test and post-test design. The sample used in this study was 10 students of the third semester of sports majoring in Health, Physical Education, and Recreation (HPER). The sample was taken by using purposive random sampling. Jump power data was measured by vertical jump test. The data analysis technique used Paired Samples Test. The prerequisite test used the sample normality test (Kolmogorov-Smirnov Test with α = 0.05) and the homogeneity of variance test (Levene Test with α = 0.05). Based on the results of the study, it showed that there was a significant difference between the pre-test and post-test of plyometrics circuit training model to increase jump power, Tscore = 12.31 > Ttable = 1.83 (p<0.05).
Characterization of sarulla natural zeolite activated with various acid concentration and loaded with Ni and Ni-Mo metals as bifunctional catalysts
Authors: Sihombing J L , Ginting E , Amdayani S , Pulungan A N , Tanjung V , Sandy A A , Rahayu R 
Published: February 2022

Abstract
Metal loading on zeolite to produce bifunctional catalysts is reported to increased the characteristics of zeolites which synergistically increase their catalytic activity. Sarulla natural zeolite (SNZ) from North Sumatera has the potential as a catalyst because of its excellent chemical properties including acidity, thermal stability, and large pores. On the other hand, natural zeolite contains a lot of impurities and lower acidity density so that it needs to be processed before use. In this research, modification of the acidity density of zeolite and metal loading were expected to improve the characteristics of SNZ as a catalyst. To achieved this goal, the research methods carried out include preparation, activation process with mineral acid with various concentrations of 3M, 5M, and 7M, then calcination with N2 gas flow. Ni and NiMo loading by wet impregnation method followed by oxidation and reduction with O2 and H2 gas flow, respectively. Some important properties of the catalyst were characterized by XRD, SEM, and determination of surface area by BET method. Ni/SNZ-7 catalyst showed the largest spesific surface area (92 m2/g), the least impurities (3%), and the most homogeneous surface morphology compared to other catalysts. The deposition of two metals in the zeolite generally causes an increase in the pore diameter and crystallinity degree, while decreasing in the pore volume of catalyst.