bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimation of air cooling requirement for the soebali 2.0 laboratory
Authors: Sutadi  , Saefurrochman  , Nuraini E , Suprapto  
Published: February 2020

Abstract
To support the operational safety of Soebali 2.0 (Sophisticated electron beam accelerator launched by Indonesia version 2.0), laboratory room condition with clean and dustfree, low temperature and humidity was required, and also maintained its stability using Air Conditioner (AC). In this regard, it was conducted to estimate the calculation of air cooling loads as a reference in determining the technical specification of AC that will be installed in Soebali 2.0 laboratory. Estimation was conducted to determine the air cooling loads that arise related to the construction of the building and supporting equipment for Soebali 2.0, which generates heat as the air cooling loads. Based on the estimation result, the total cooling capacity of the air conditioning system was about 153.585 BTU/hours or 15 kW. It was used for cooling the Soebali 2.0 laboratory room with 900 m3 of volume along with the operational supporting equipment was about 20 °C and relative humidity was 50 %.
Neutronic analysis of critical assembly for moly-99 production reactor based on mixed Th-U fuels
Authors: Delphito B , Syarip  
Published: February 2020

Abstract
Neutronic analysis of nuclear reactor systems for 99Mo isotope production based on mixed thorium-uranium (Th-U) nitrate fuels has been done. The 99Mo isotope is a 99mTc generator which is the most widely used radioisotope in nuclear medicine. The proposed critical reactor system or critical assembly for 99Mo production or CAMOLYP is currently being studied in BATAN Yogyakarta as a continuation of the development of subcritical assembly for 99Mo production called SAMOP R&D program. The aim of this research is to obtain the optimum CAMOLYP core configurations, the core is an annular cylindrical provided by the outer ring. The method used is the calculation of the critical level of CAMOLYP for two reactor core configuration models, using the MCNPX computer code. The analysis result shows that there are various configurations of CAMOLYP core to achieve criticality condition. The best configuration of design-A is by using a Th-U nitrate density of 300 g Th-U/L or 120 g U/L, with a volume of 56.7057 L Th-U nitrate, surrounded by 38 TRIGA wt-12% in the outer ring (kef = 1.000334). While in Design-B, the best configuration is by using 24 fuel rods with a UN volume of 29.0978 L using the UN density of 300 g U/L (kef = 1.0562). The amount of 235U in the first core design is 3376.74 g, while the second design is 1724.046 g. Based on the total amount of 235U needed to achieve criticality, the author concluded that the best design for CAMOLYP is Design-B.
Tuning Localized Surface Plasmon Resonance (LSPR) of Au-Ag Nanoalloys by Femtosecond Laser
Authors: Hidayah A N , Herbani Y 
Published: February 2020

Abstract
Au-Ag nanoalloys have been synthesized using the photochemical reduction method by femtosecond laser from dissolving of potassium gold (III) chloride (KAuCl4) and silver nitrate (AgNO3) added into a quartz cuvette in various volume ratios with a total volume of 3 ml. The samples were then called AuxAgy, where x and y were the volume fraction for Au and Ag ions, respectively. The samples were irradiated for 15 minutes of irradiation time and characterized by UV-Vis spectrophotometry to observe the absorption spectra in 300-800 nm range and determine the wavelength at which the Localized Surface Plasmon Resonance (LSPR) peak was observed. The process occurred in a water-only medium, in water medium added with 0.01 wt% polyvinylpyrrolidone (PVP) and in water medium added with 0.1 wt% polyvinylpyrrolidone (PVP). The result showed that LSPR of Au-Ag nanoalloys could be tuned between ∼525 nm for Au and ∼403 nm for Ag in a water-only medium, ∼521 nm for Au and ∼412 for Ag in water medium added with 0.01 wt% PVP and ∼522 nm for Au and ∼419 nm for Ag in water medium added with 0.1 wt% PVP.
Magnetic field of DECY-13 from numerical extrapolation of the measurement result for beam trajectory simulations in central region
Authors: Kudus I A , Silakhuddin  , Anggraita P , Satriawan M 
Published: February 2020

Abstract
DECY-13 cyclotron is a radioisotope production cyclotron developed by PSTA. In a cyclotron, it is important to understand magnetic fields and electric field distribution for the proton beam trajectories. This paper describes the distribution of the magnetic field from the experimental measurement. Magnetic field has been converted into 3-dimensional data by extrapolation. Data validation was done by comparing the Opera3D simulation and used in simulations of the beam trajectories. Simulations were carried out by using Scilab 5.4.1 and the Runge-Kutta (RK4) approximation method. The parameters used in DECY-13 cyclotron were 40 kV Dee voltage with a radiofrequency (RF) 77.66 MHz and a fourth-harmonics type. The calculations and simulations result showed the beam could pass through the puller at the distance of the ion source with a puller was 6 mm and the optimum distance of 4 mm. The largest difference in error at z = 6 mm was 0.023 T of the average magnetic field 1.275 T. The phase acceptance in horizontal and vertical motion in the central region was about 38 Degrees from -19° to 19°. This experimental and simulation data could be used as a reference for DeCY-13 cyclotron magnetic and electric field distribution profiles.
Transfer factor as indicator of heavy metal content in plants around adipala steam power plant
Authors: Prabasiwi Devi Swasti , Sukirno  , Murniasih Sri , Rozana Kharistya 
Published: February 2020

Abstract
The purpose of this research is to identify and characterize the main and trace metals in plant (cassava leaves and grass) and soil. Results of the characterization was used to determine the transfer factor (TF) of metal absorption from soil to plant around Adipala power plant located in Cilacap Regency. Measurement of metal concentrations were carried out using instrumental neutron activation analysis techniques. Samples were irradiated in Rabbit and Lazy Susan system facility at the Kartini research reactor located in Centre for Accelerator Science and Technology. Irradiated samples then counted using HPGe detector. Concentration values for heavy metals were below the maximum recommended value stated by WHO and FAO. Transfer factor (TF) is used to assess the concentration of metals in cassava leaves and grass taken from soil. The TF value calculated in this research were below 1, this implied that cassava leaves and grass were safe from the risk of heavy metals. The highest transfer factor value is Sb, it showed that is Sb was more mobile compare to other metals.
Real-time acquisition and correction of temperature effect in NaI(Tl) detector-based environmental gamma radiation detection device
Authors: Putu Susila I , Istofa  , Sukandar  , Santoso Budi 
Published: February 2020

Abstract
Environmental radiation monitoring especially around nuclear facility is needed to ensure public protection and safety. An online radiation monitoring system which continuously detects the presence of radioactive material in the environmental is important system to quickly detects uncontrolled radioactive released to the air. In this study, a radiation detection device based-on NaI(Tl) scintillation detector as part of an online radiation monitoring system has been developed and tested. During field testing, radiation count rate, and operational condition parameters which are temperature and relative humidity was collected continuously for 3 months. Data was transferred every 10 seconds with average communication delay around 0.57 second. Total number of data points is 733,725 records, and the average count rate was 653.09 cpm (σ = 81.77). Measured temperature is between 18.9 °C and 44.3 °C, while relative humidity is between 19.4 %RH and 78.6 %RH. Experimental result shows that count rate has temperature dependence. Effect of temperature to the count rate was estimated using power equation, and then the equation is used to correct the measurement data. After correction, several peaks which indicates the presence of radioactive material other than background radiation can be identified easily. In the future, further development such as radionuclide identification feature can be added to the prototype.
Processing and Refining of Tin Tailing Mining
Authors: Pusporini N D , Suyanti  , Amiliana R A , Poernomo H 
Published: February 2020

Abstract
Exploration and production of tin massively has an impact in the quantity of tailing production. The tailing contains various strategic metal-carrying minerals, namely monazite, xenotime, zircon and ilmenite. By the right process, these minerals can be purified into high-value metals such as rare earth elements, Zr and Ti. The research purpose is conducting a study towards processing and refining technology of tin tailing. The study was performed by analyzing the composition of Bangka tin tailing using XRF. Based on these information, flow diagram of processing and refining technology of monazite to Ce2O3, La2O3 and concentrated Nd(OH)3; xenotime to concentrated Y2O3; zircon to ZrO2; and ilmenite to TiO2 have been generated. The result showed that processing and refining of tin tailing mining contained mineral monazite, xenotime, zircon and ilmenite could be carried out. However, it is still necessary to further develop the process by giving highly attention to the economic concept.
Assessment of natural radioactivity levels in soil sample from Botteng Utara Village, Mamuju Regency Indonesia
Authors: Nurokhim  , Kusdiana  , Pudjadi Eko 
Published: February 2020

Abstract
High background radiation areas usually are correlated to the high concentration of primordial radionuclides activity from Uranium/Thorium series and 40K. This paper reported the natural radioactivity level in soil sample was taken from Botteng Utara village area. The activity of primordial radionuclide such as 226Ra, 232Th and 40K were investigated from the soil by gamma spectrometry. In order to evaluate the radioactivity levels of the area, Radium equivalent activity (Raeq), the absorb dose rate (D), the annual effective dose rate (E), the external hazard index (Hex), and internal hazard index (Hin) were calculated and compared with the internationally approved value. The concentration of 226Ra, 232Th and 40K measured by gamma spectrometry are lies in the range 268.90 to 2921.17, 993.07 to 3153.81, and 115.72 to 438.26 Bq.kg−1respectively. The average and maximum annual effective dose received by Botteng Utara resident from terrestrial gamma rays are 10.40 and 18.62 mSv y−1, which is the maximum received by resident of Tande-Tande hamlets. This present work clarify that Botteng Utara is an area with high background radiation exposure from primordial radionuclides activity.
Effect of Gd substitution on the crystal structure, magnetic susceptibility and biocompatibility of nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles
Authors: Hariyanto Yuanita Amalia , Hartatiek  , Taufiq Ahmad 
Published: February 2020

Abstract
This research investigated the crystal structure, magnetic susceptibility, and biocompatibility of the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles for x = 0%, 1.00%, 1.25%, 1.50%, and 1.75%. The hydrolysis method was employed to produce the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles from natural calcite. The crystal structure and magnetic susceptibility of the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles were characterized by means of X-ray diffraction (XRD) and susceptibility meter, respectively. The elemental data analysis presented that the natural calcite as the main precursor contained calcium of 98.84%. Moreover, the diffraction data showed that the increase in Gd content decreased the lattice parameters and crystal volume of the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles. The magnetic character of the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles changed from diamagnetic to paramagnetic as the increase of Gd content. Interestingly, the increasing Gd content enhanced the magnetic susceptibility of the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles. Furthermore, the nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles had an excellent biocompatibility. Therefore, the prepared nano-sized Ca10-x
Gd
x
(PO4)6(OH)2 particles open a potency to be applied for biomedical treatment.
Performance Analysis of Linear Quadratic Regulator Method in Microalga Growth with Control of Light Intensity
Authors: Mardlijah  , Fadhillah A , Hanafi L 
Published: February 2020

Abstract
Microalgae is an alternative energy source that considered capable of answering fuel oil scarcity problem. The growth of microalgae plays an important role in biomass production. One of the factors that influence the growth of microalgae is the control of light intensity so that it is necessary to adjust the intensity of the incoming light to produce maximum biomass. Control the intensity of light on the microalgae growth can be modelled in the form of differential equations and can be seen as a system. The control method chosen in this study was a linear quadratic regulator (LQR), as well as a comparison with the previous method, namely Pontryagin minimum principle (PMP). The simulation results show that at LQR an increase in the amount of biomass reaches 91.77% from initial condition. While the PMP has doubled from its initial condition.
Analysis of Multivariate Adaptive Regression Spline (MARS) Model in Classifying factors affecting on Student the Study Period at FKIP Darussalam University of Ambon
Authors: Zurimi S , Darwin  
Published: February 2020

Abstract
This study aims to determine the applicative model that can be revealed through the Multivariate Adaptive Regression Spline (MARS) classification Model for the problems alumni study period of the FKIP Darussalam University of Ambon. To find out the applicative model that can be revealed through the MARS classification model, parameter estimation is first performed to find the best MARS model. The best MARS model is chosen based on the minimum generalized cross validation (GCV) value.The research result indicates that the parameter estimation of MARS model using Ordinary Least Square (OLS) method obtained were convergent. This is indicated by the smallest of value Mean Square Error (MSE). In addition, the application of the MARS model using the OLS method on data alumni study period of the FKIP Darussalam University of Ambon, result indicates that there is an influential base function, BF3 which contains two predictor variable, that is first semester achievement index and family economics conditions. This is caused by BF3 has a significance value tcount > ttable so the decision taken is to reject H0 which means that the BF3 basis function parameter has a significant effect on the model.
Synthetic Bioplastic Film from Rice Husk Cellulose
Authors: Hayatun A , Jannah M , Ahmad A , Taba P 
Published: February 2020

Abstract
Rice husk has high cellulose content so that it could be used as a basis for making bioplastic. This research aims to synthesize cellulose-based bioplastic films from rice husks. The method stages of this study were cellulose extraction, alkali treatment, bleaching, and analyzing by Fourier Transform Infra-Red (FTIR). Bioplastic film were synthesized using cellulose, chitosan and sorbitol with variaion in cellulose and chitosan masses to obtain bioplastic films with high mechanical strength. The obtained bioplastic films were tested mechanically by using Universal Testing Machine (UTM). The result of this research showed that cellulose obtained from the extraction was 59.2%, odorless, and white powder. The best bioplastic film was at a variation of 0.8 g cellulose, 1.2 g chitosan, and 1 mL sorbitol with a tensile strength 0f 5.4147 N/mm2
Effectiveness of Brown Algae (Padina australis) Extract as Antioxidant Agent
Authors: Junopia A C , Natsir H , Dali S 
Published: February 2020

Abstract
The pattern of disease development has shifted from infectious diseases to degenerative diseases that are triggered by a free radical. The body needs an antioxidant that able to ward off free radicals. One of the potential natural resources is brown algae that contain bioactive compounds and widely used in medicine and the pharmaceutical industry. This research aims to identify the effectiveness of brown algae (Padina australis) extract as a natural antioxidant agent. This research was carried out in several steps, including algae extraction by sonicator method, phytochemical test to identify secondary metabolites in extract and antioxidant test by using DPPH method. The results showed that the extract of brown algae (Padina australis) contained flavonoids, alkaloids, saponin, and steroids. It also has antioxidant activity with an IC50 value of 102,590 µg/mL.
Isolation and Characteristics of Musa troglodytarum L. Starch at Different Maturity Stage
Authors: Palijama S , Singkery M , Breemer R , Polnaya F J 
Published: February 2020

Abstract
This research was aimed to isolate and to characterize the chemical properties of F’ei banana (Musa troglodytarum L.) starch at different maturity stages. Chemical properties observed including moisture, ash, protein, fat, carbohydrate, fibre, and total sugar contents. F’ei banana with different maturity stages, i.e. first, second, and third maturity stages were applied in this research and were collected from the farmers in Naku Village, South Leitimur District. A completely randomized experimental design with three replications was applied. Results showed that the stage of maturity of the banana affected all observed variables. Moisture, fibre, and total sugar contents increased with increasing degree of maturity, whereas other variables were found to be decreased.
Community Structure of Sea Cucumber (Holothuroidea) In Pombo Island Conservation Area, Central Maluku
Authors: Samson E , Wakano D , Rahanawatty H 
Published: February 2020

Abstract
Sea cucumbers (Holothuroidea) are marine animals that is highly nutritious for human consumption, commercially important, and serve a useful role in the marine ecosystem Less optimal monitoring in Pombo Island Conservation Area and the activity of catching sea cucumbers by the surrounding community, then the aim of this research is to find out community structure of sea cucumber in Pombo Island Conservation Area, Central Maluku. It is a descriptive quantitative research. The research was conducted from October 28, to November 28, 2018 by using linear quadratic transect method. Based on the result of the research, it can be concluded that there were 208 individuals which consists of 1 family (Holothuroidea) and 3 species (Holothuria atra, Holothuria leucospilota, Holothuria nobilis). The most observed species is Holothuria atra with a total of 111 individuals whereas the least observed species is Holothuria nobilis with a total of 42 individuals. Furthermore, Holothuria atra was the species with highest density, abundance, frequency of occurance, and important value index while the lowest is Holothuria nobilis. The diversity index value is in medium category at 1.0086, while the dominance index value is close to 0 (0.3385) or no species dominates.
Tetrachloroaluminate Ion on Graphene Quantum Dots: Towards the Design of Cathode for Aluminum-ion Battery
Authors: Mulya F. , Parasuk V. 
Published: February 2020

Abstract
The adsorption of tetrachloroaluminate, AlCl4
−, on Graphene Quantum Dot (GQD) were studied using Density Functional Theory (DFT). Coronene (C24H12) and circumcoronene (C54H18) were used as the model of GQDs. All possible adsorption sites which include hollow, bridge, and on-top as well as three possible standing positions of AlCl4
− were investigated. AlCl4
− can be adsorbed on the GQD surface with the adsorption energy of -2.35 to -2.83 eV for the charging condition. The adsorption energy of AlCl4
− during charging is around 10 times that during discharging. From our study, GQDs can be used as cathode material for Aluminum-ion Battery (AIB) providing higher voltage than graphite. The theoretical voltage for coronene and circumcoronene was found to be 4.3V and 4.0 V, respectively.
Nonuniqueness and mean-field criticality for percolation on nonunimodular transitive graphs
Authors: Hutchcroft Tom 
Published: February 2020

We study Bernoulli bond percolation on nonunimodular quasi-transitive graphs, and more generally graphs whose automorphism group has a nonunimodular quasi-transitive subgroup. We prove that percolation on any such graph has a nonempty phase in which there are infinite light clusters, which implies the existence of a nonempty phase in which there are infinitely many infinite clusters. That is, we show that

p
c

>

p
h

≤

p
u

p_c>p_h \leq p_u

for any such graph. This answers a question of Häggström, Peres, and Schonmann (1999), and verifies the nonunimodular case of a well-known conjecture of Benjamini and Schramm (1996). We also prove that the triangle condition holds at criticality on any such graph, which implies that various critical exponents exist and take their mean-field values.

All our results apply, for example, to the product

T
k

×

Z

d

T_k\times \mathbb {Z}^d

of a

k
k

-regular tree with

Z

d

\mathbb {Z}^d

for

k
≥
3

k\geq 3

and

d
≥
1

d \geq 1

, for which these results were previously known only for large

k
k

. Furthermore, our methods also enable us to establish the basic topological features of the phase diagram for anisotropic percolation on such products, in which tree edges and

Z

d

\mathbb {Z}^d

edges are given different retention probabilities. These features had only previously been established for

d
=
1

d=1

,

k
k

large.
Cold Business and the Hot Take
Authors: Deloria Philip J. 
Published: February 2020

Abstract
David Silverman offers a critical appraisal of two prizewinning works in Native American and Indigenous studies (NAIS), Our Beloved Kin: A New History of King Philip’s War, by Lisa Brooks, and Memory Lands: King Philip’s War and the Place of Violence in the Northeast, by Christine M. DeLucia. Silverman’s review treats the methodology associated with NAIS with some skepticism, offering the opportunity for a lively discussion about the merits and perils of community-engaged history scholarship. Four scholars of Native American history, including DeLucia, respond, defending new approaches to Indigenous history represented by these recent works.
“Glorious Mothers” and “Rational Women”: A Comparative Analysis of the Chinese and English Regulatory Models of Abortion
Authors: Cao Weiwei 
Published: February 2020

Abstract
Access to safe abortion is essential to satisfy women’s need for healthcare and control over their life choices. Modern regulation of abortion appears to be female friendly because it abandons the old oppressive appearance and wears a liberal face. By examining the images of “glorious mothers” and “rational women” constructed by the Chinese and English regulatory models of abortion through a feminist lens, this Article aims to offer a more critical response to the two jurisdictions. Furthermore, by comparing the two models of abortion law, the Article provides feminists and reformers with a chance to learn about each other’s experiences and different regulatory strategies. As a result, they will be able to view the merits and shortcomings of their national abortion law from a fresh angle. Finally, this comparative study offers a basis for feasible law reform proposals that would empower women in decision making concerning abortion.