bluuebunny/crossref_metadata_2025_split huggingface dataset:
Detection of groundwater aquifers using geoelectrical resistivity method (case study : Plupuh Sub-district, Sragen District )
Authors: Darsono Darsono , Marzuki Ahmad , Nuryani Nuryani , Yuliyanto G. 
Published: June 2023

Abstract
An aquifer is a layer below the ground surface that contains groundwater. Inside the earth there are unconfined aquifers and confined aquifers, where unconfined aquifers are located near the surface while confined aquifers are located very deep beneath the earth. This study aims to find the location, depth, and thickness of aquifers that have the potential to contain large amounts of groundwater. The instrument used in this research is a resistivity meter OYO Model 2119C Mc OHM-EL, with a Schlumberger configuration with a current electrode length of AB/2 to 350 meters. Data acquisition were carried out in the Plupuh sub-district, Sragen district as many as 5 sounding points, and data processing using IP2win software. Based on the interpretation of resistivity geoelectrical data, it can be concluded that the area has the potential to have a lot of groundwater content, for unconfined aquifers at the TS1 sounding point with a depth of 7.7 meters to 19.2 meters with a thickness of 11.5 meters. and TS4 with a depth of 15.4 meters to 30 meters with a layer thickness of 14.6 meters. This aquifer layer is dominated by sand layer lithology, while the confined aquifer layer is located around TS1 and TS2. The two sounding points are located in the east and northeast of the research area. TS1 was detected at a depth of 39.9 meters to 110 meters with a layer thickness of 60.1 meters and TS2 was at a depth of 40.2 meters to 66.5 meters and 80.2 meters to 139.7 meters with a thickness of 84.8 meters. This aquifer layer is dominated by the gravel sand layer in TS1 and the sand layer in TS2.
Stratification characteristics of subsurface rock structure geothermal manifestations at Telaga Tujuh Warna Bukit Daun, Bengkulu, Indonesia using magnetic methods
Authors: Farid Muhammad , Refrizon  , Oktiana Andeska Defta , Ismul Hadi Arif 
Published: June 2023

Abstract
Geothermal energy is one of the mainstay of future alternative energy in Indonesia. One area that is believed to have geothermal potential is Telaga Tujuh Warna Village in Lebong Regency, Bengkulu Province, Indonesia. Manifestations of hot springs, hot mud pools, geysers, sulfur, and the presence of steam around the lake are our beliefs about the existence of geothermal sources in the area. The purpose of this study was to determine the stratigraphic characteristics of the subsurface rocks of the Telaga Tujuh Warna geothermal manifestation area. Magnetic method was used to determine the subsurface rock stratification of the Telaga Tujuh Warna area. The magnetic method is carried out based on the measurement of geomagnetic anomalies caused by differences in the contrast of the magnetic susceptibility or permeability of the surrounding area. Based on 2D modeling of the subsurface lithology the area was compiled by of volcanic breccia (0 SI), basalt (1.03 SI, 0.205 SI, 0.2 SI, 0.23 SI, 0.207 SI), altered tuff-breccia rock (-0.041 SI), andesite rock (0.12 SI, 0.13 SI), altered tuff (-0.001 SI, -0.01 SI), and breccia-andesite rock (0.156 SI, 0.049 SI), tuff (0.027 SI), and altered andesite (-0.004 SI).
Study on the basic of spallation target for accelerator driven system
Authors: Slamet Pudjorahardjo Djoko , Sujitno Tjipto , Suprapto  
Published: June 2023

Abstract
A study on the basic of spallation target for Accelerator Driven System (ADS) has been done. ADS is a subcritical assembly combined with a high-power proton accelerator. In the center of the subcritical assembly, there is a spallation target for producing primary neutrons that will be multiplied by the subcritical core surrounding it. The neutrons are produced via spallation reaction which occurs when the spallation target is bombarded by high-energy protons. The spallation target has to be designed so that the number of neutrons escaping from the target per incident proton is maximum and the power density deposited on it is high (~1 MW/litter). The spallation target can be made of a solid or liquid material such as Pb, Hg, U, W, Ta, or Pb-Bi which are the most preferred materials for spallation targets. But, today Pb-Bi is the reference material for ADS applications. The spallation target has a large thermal load due to the conversion of about 10 MW proton into a neutron. Therefore, the target needs a cooling system; there are two options that can be considered i.e., cooling by means of the subcritical reactor primary system coolant and cooling by means of an independent loop.
Study of 3D printing materials as potential applications of phantom radiology
Authors: Yunianto M , Andika S N , Suparmi  , Cari  , Hargiani N , Ardyanto T D 
Published: June 2023

Abstract
This paper reports the results of the study of 3D printing materials applied as phantom radiology, which is an imitation of human body tissue for medical radiology purposes. The types of 3D printing materials were ABS, PETG, flexible TPU, Wood and PLA resin. Each of them was printed using 3D printing into phantom sample of 30 mm x 30 mm x 9 mm. The phantom samples were then tested using Siemens CT-Scan machine. Radiant Dicom Viewers and Micro Dicom Viewers software were used to process the data and determine the amount of CT number. The CT number values of ABS, PETG, fleksible TPU, Wood and PLA resin filaments were -680,00 HU; -641,17 HU; -685,62 HU; -690,00 HU and 133,00 HU. The electron density values of 3D printing materials were 0,32; 0,36; 0,31; 0,31 and 1,12. These two values were confirmed using Gammex 467 Tissue Characterization Phantom. The results found that ABS, Wood, PETG and FLEX had potential for lung phantom radiology materials. However fleksibel TPU filament has the greatest potential because it has the closest CT-number and electron density value.
The Direct Cylindrical Boris Algorithm
Authors: Shali A.H. , Adabiah S. R. 
Published: June 2023

Abstract
A modification of Boris Algorithm in cylindrical coordinate used to solve Lorentz equation for axisymmetrical plasma simulation is proposed. The velocity updates are calculated directly using matrix operation. The inertial forces are evaluated at n-0.5 time steps. The algorithm is tested for several scenarios: electric field only, electric field dominated, |E| = |B|, ExB drift, gyration test, and a test devised by Delzanno. The result is compared to the standard Boris solver in cylindrical coordinate. The results show that even though generally the solver is not that accurate compared to the standard Boris solver, especially for a larger time step width, it is comparatively faster. Thus, the solver might be useful for plasma simulations that do not require detailed trajectory for each simulated particle.
Characterization of Spectroradiometric Based Luminous Flux Measurements for LED Luminaires at BRIN Indonesia
Authors: Prihhapso Y , Samodro R A , Pramudya T , Firdaus M Y , Wibowo D K , Setianingrum L , Hamidah M , Rahardjo S , Rasuanta M P , Rahmadiansyah M 
Published: June 2023

Abstract
Light Emitting Diode (LED) luminaires are known to have higher efficacy compared to other types of light sources. Therefore, this type of luminaire has been deployed to replace existing conventional types of light sources as means of energy-saving around the world. LED efficacy is commonly measured using a photometer mounted in a goniophotometer or an integrating sphere system. However, due to the different spectral properties of the LEDs compared with the source used in the photometer calibration, mismatch correction needs to be applied in the measurement process. Due to the arduous process of obtaining the correction, the measurement of luminous flux using a spectroradiometer is proposed in this study. By utilizing this device, the mismatch correction does not need to be applied. The measurements of several commercially available LED and energy-saving compact fluorescent luminaires (CFL) show that current LED has twice the efficacy of the CFLs. The LED shows efficacy in the range of 114 lumen/watt. The measurement uncertainty associated with the efficacy of the LED is 4.2%. It is expected that the quality assurance and the accuracy of LEDs luminaires measurement and testing in Indonesia can be improved by using the integrating sphere with the spectroradiometer measurement method.
Development a prototype of river water level monitoring system using ESP32 based on internet of things for flood mitigation
Authors: Pramono N A , Purwandani B A , Ghaisyani O , Mallisa F P P , Sofyan F I 
Published: June 2023

Abstract
Flood is one of the disasters which often strike Indonesia. It is one of the disaster which can cause plenty of losses for the community that are not limited to material losses only, but casualties too. Along with the development of science and technology, flood mitigation can also be performed through the latest technologies which are more effective. One of the technologies which can be applied to help monitoring flood is river level monitoring system that is based on the Internet of Things. The purpose of this study is to create a river level monitoring system by using ESP32 based on the Internet of Things for flood mitigation. This system uses Ultrasonic Sensor and the monitoring results will be displayed on Blynk and Thingspeak which are connected to the ESP32. The result is a prototype of a river level monitoring system, which es expected to be used for flood mitigation.
Dose analysis of Boron Neutron Capture Therapy (BNCT) on head cancer using PHITS code with neutron source from accelerator
Authors: Bilalodin  , Haryadi Aris , Abdullatif Farzand 
Published: June 2023

Abstract
The dose analysis of Boron Neutron Capture Therapy (BNCT) on head cancer using the Particle and Heavy Ion Transport Code System (PHITS) has been carried out. The purpose of this study was determine the rate of dose received and the irradiation time required for head cancer therapy using the BNCT method. The research was conducted through a simulation approach. The PHITS code was used to design an epithermal neutron source derived from accelerator and to define the geometric dimensions of the head tissue components. The head model is based on Snyder’s head model with cancer cells located in the center of the brain at a depth of 3.8 cm. The investigation of the dose distribution on the head included skin, skull, brain and cancer sections consisting of Planning Target Volume (PTV), Clinical Target Volume (CTV) and Gross Tumor Volume (GTV). Simulations were carried out at boron concentrations of 30, 40, 50, 60, 70, and 80 μg/g tissue. Based on the simulation results, the greater the boron concentration, the greater the resulting dose rate. The highest dose rate was obtained in the GTV area of 6.37 x 10-2 Gy/s using a boron concentration of 80 μg/g tissue. The effective time for cancer therapy was calculated based on the highest dose rate obtained at 13,08 minutes.
Characterisation of acoustic louvres panel for Heating Ventilating and Air Conditioning (HVAC) noise control
Authors: Irawan S R , Suyatno  , Indrawati S , Fatimah I , Indarto B , Muntini M S , Anggoro D 
Published: June 2023

Abstract
This paper presents the results of research about louvre panels with 4 blades, 5 blades, and 6 blades for mechanical and acoustical performance which installed at the outlet of the ducting system. The mechanical performance will show up the airflow velocity and pressure drop, for the acoustical performance will analysed for its ability to reduce noise in the HVAC System. The measurement method used a rectangular linear duct with the inlet of a fan as an airflow source and loudspeaker as a noise source. The ability tested from the acoustic parameters of TL and the directivity of the noise from the outlet section, as well as mechanical analysis performance based on airflow and pressure drop. For the pressure drop parameter value is up to 20 Pa for 4 blades louvre, and about 24 Pa for 5 blades and 6 blades louvre. By using third octave band filter from 20 to 8000 Hz, the highest TL value is at 27 dB at a frequency of 63 Hz. For the directivity used to determine the distribution of sound energy around the outlet, it shows that the highest SPL value is at a frequency of 1 kHz with the difference from the perpendicular angle of the outlet after being given a louvre acoustic panel of 12 dB. So, the installation of louvre panels has small of pressure drop effect, but it can be effective for noise reduction.
The effect of concentration extender on the making of lignin phenol-formaldehyde from coconut fibre as an environmentally friendly adhesive
Authors: Yusmaniar  , Kurniadewi F , Nur Oktavia A 
Published: June 2023

Abstract
This study aims to make adhesives with a variety of concentration extenders. First, the coconut husk was delignified with 25% NaOH and then precipitated with sulfuric acid. The yield of lignin from coconut coir was 38.92%, with a purity of 68%, a phenolic hydroxyl content of 2.47%, and an equivalent molecular weight of 1666.67 g/mol. Lignin was then used to synthesize phenol-formaldehyde (LPF) lignin by adding tapioca flour extender with variations of 10%, 20% and 30% of the mass of phenol through the resol method with 50% NaOH catalyst. Then the characterization was carried out using FTIR Spectrophotometer, XRD and adhesive test. The results showed that the LPF copolymer with a 10% extender was better than the LPF copolymer without an extender for wood adhesives with adhesive resistance of 955.34 N and low formaldehyde emission of 0.44 mg/L.
Machine learning approach to the temperature gradient in the case of discontinuous temperature boundary conditions in a triangular cavity
Authors: Pekmen Geridonmez B 
Published: June 2023

Abstract
In this study, a prediction for the temperature gradient close to the sharp corners on a right triangle having singularity is proposed utilizing statistical techniques. This singularity is a result of different Dirichlet types of boundary conditions at the corners. In most of the numerical methods, refinement on corners is done, and computational difficulty in gradient calculation is softened. However, the increased refinement results in a blow-up in the temperature gradient close to the problematic corner. A natural convection flow problem is concerned in a right isosceles triangle in two cases of singularity at the left top corner. In Case 1, the left vertical hot wall and the right inclined cold wall, and in Case 2 the left vertical cold wall and the right inclined hot wall are considered. In the present approach, input data is built from the numerical solution of the problem by cutting the region at a chosen cutting point where almost blow-up starts at the temperature gradient along the hot wall. Then, model functions are derived by using machine learning techniques either multivariate adaptive regression splines (Mars) in R project or Trilayer Neural Network (TNN) in Regression Learner Toolbox in Matlab. The obtained model function for the temperature gradient is used to predict the temperature gradient of points above the cutting point. Therefore, the temperature gradient along the hot wall is calculated by combining the temperature gradients of numerical-below and predicted-above. Average Nusselt number as an integral of the temperature gradient along the concerned hot wall is compared with a reference study, and good agreement is observed. That is, modeling of the temperature gradient on singular points is a way of approach for computing accurate results of the temperature gradient.
Air-traffic controller and autopilot joint control of aircraft as mixed integer quadratic problem
Authors: Mikhailov A V , Kumkov S S 
Published: June 2023

Abstract
One of the traditional problems in air-traffic management is optimal safe scheduling aircraft at a point of air-routes join. However, this problem implies another one, namely, the problem of guiding the aircraft to the prescribed point of its route at the necessary instant. The latter problem is studied much less attentively. Change of the arrival instant can be provided by alternating the aircraft motion trajectory on the basis of near-airport air-routes scheme or by alternating its velocity. Such a control can be worked out as automatically by the aircraft autopilot as manually by an air-traffic controller. But it can be difficult to an air-traffic controller to construct such a control especially during rush hours in loaded airports. In this paper, the authors suggest an optimizational formalization of the problem of automatic directions generation for such a guiding. The criterion to be minimized in this formalization is the number of controller-pilot interactions, because each such an interaction is a long, difficult process liable to linguistic, technical, psychological, and other errors. Since the criterion and other processes are of discrete kind, the formalization is done in the framework of mixed integer quadratic programming. The obtained problems are solved numerically by means of MIQP-solver provided by the Gurobi library. Each subproblem is solved quite fast within 0.1-0.5 seconds. So, solution of the entire problem (which includes enumeration of trajectories and choice of the optimal velocity regime for each of them) takes one-two seconds. Thus, the problem for the entire group of aircraft can be solved during a time acceptable for a real time application.
Post-Weaning Growth Performance of Belgian Blue Crossed with Brahman Cross
Authors: Sidik M , Gemilang I , Fathoni A , Hartatik T , Bintara S , Ismaya  , Widyobroto B P , Budisatria I G S , Leroy P , Antoine-Moussiaux N , Panjono P 
Published: June 2023

Abstract
This study was conducted to observe the post-weaning growth performance of Belgian Blue-Crossed (BB-crossed) and Brahman Cross (BX) calves. This study used a total of eighteen calves (BB-crossed = 6 heads and BX = 12 heads) aged 6 months. Calves were reared for six months under the same conditions and management. Calves were observed and measured their growth performance (body weight, body length, heart girth, and withers height). Data were analyzed using One-Way Anova, and for body weight gain and body size gain were analyzed by Ancova with initial body weight and initial body size as covariates. BB-crossed calves in this study had a body weight and body size greater than BX calves (P<0.05). BB-crossed calves also had increasing in body weight (BB-crossed 0.87±0.06 vs BX 0.63±0.04 kg/day) and body length (BB-crossed 0.23±0.01 vs BX 0.12± 0.01 cm/day) was greater (P<0.05) than BX calves, while the increasing in body height (BB-crossed 0.09±0.01 vs BX 0.07±0.01 cm/day) and heart girth (BB-crossed 0.16±0.02 vs BX 0.18±0.01 cm/day) did not differ. In conclusion, BB-crossed calve had post-weaning growth performances greather than BX calves, except increasing in withers height and heart girth. Thus, crosses with Belgian Blue cattle can improve post-weaning growth performance of BX calves.
A Study of Agricultural Biodynamic Innovation Diffusion
Authors: Rizkiansyah Mariko , Ariestyani Arleen , Yunus Ulani 
Published: June 2023

Abstract
Online media has an advantage over other conventional media, such as television and radio, namely interactivity. This interactivity process causes two-way communication between users on social media. Although biodynamic techniques have long been discovered and developed, their application is still not developed in Indonesia. This study aims to discover how biodynamic innovation spread through the interactivity of WhatsApp media in agricultural support communities. The theory used is the McMillan interactivity model. this research also used the diffusion innovation from Rogers and Willis’ three principles of biodynamic success as one of the supporting theories. In addition, this study also uses Three levels of social media analysis: the level of audience engagement, interaction, and message relationships. The results showed four significant themes for user-to-user interactivity: innovation, socialization, consultation, and information on biodynamic techniques. The use of eco enzymes and Jakaba mushrooms is the focus of interactivity in this group. The instructors’ biodynamic experts and the farmers’ experience in applying biodynamic techniques play a significant role in the active interactivity of the group and the spread of biodynamic innovations.
Effect of Nutrient Improvement and Mineral Premix Supplementation on Weight, Average Daily Gain, and Metabolite Profile of Repeat Breeder Cows
Authors: Azis I U , Astuti A , Agus A , Bintara S , Zainuddin A 
Published: June 2023

Abstract
Nutrient overload, deficiency, or imbalance are fundamental issues that frequently arises in breeder cows. Malnutrition in cattle can cause delayed puberty, an increased risk of pregnancy failure, and infertility. This study aimed to determine the effect of nutrient improvement and mineral premix supplementation on body weight, average daily gain, and blood metabolite profile of repeat breeder cattle. Sixteen Simmental Cross cattle aged 4 to 5 years (calved at least once) with an average S/C of 5 and an average body weight of 400 kg were used. The feed provided was forage, Profeed® concentrate, High Quality Feed Supplement (HQFS) and mineral premix. This study was initiated by selecting repeat breeder cattle of smallholder farmers. The selected cattle were reared for three months in the research cage with a predetermined feed for each group. During the research period, four weighings were carried out to determine the body weight of the cattle. Blood samples were taken for testing of the blood metabolite profile; at the beginning and end of the study. The collected samples were then analyzed in the laboratory, and the resulting data was analyzed for variance using the independent-t-test and paired t-test. The results showed that the addition of 0.5% mineral premix had no significant effect (P > 0.05) on body weight gain. In the blood metabolite profile, the improvement in nutrition had a significant effect (P<0.05) on glucose levels (H-0 and H-71). It can be concluded that the supplementation of 0.5% mineral premix has no effect on body weight and blood metabolite profiles. Repeat breeder cattle on smallholder farmers have low glucose levels, so improving nutrition (quality and quantity) is a matter of concern to support pregnancy.
Changes in chemical content and antioxidant activity in making dayak onion flour by sun drying
Authors: Sirajuddin M M , Rusman R 
Published: June 2023

Abstract
Dayak onion is an herbal plant from Kalimantan Island, Indonesia, with functional properties commonly used for various diseases such as cholesterol, diabetes, stroke, etc. This study aims to determine the quality of Da yak onions before and after making flour so that it can be a guide when it is processed, mixed, or fortified into other food ingredients. Processing begins with proximate testing of fresh Da yak onion samples and their antioxidant activity. Then fresh Dayak onions samples are made into flour and tested for proximate and antioxidant activity tests again to determine changes in the quality of Dayak onions. Each treatment was repeated twice, and compared the changes. Nutrient content decreased, such as water and protein in flour products, while ash and fat content increased with heating treatment, and antioxidant activity decreased along with sun drying. Based on these results, it is suggested that consumers can consume Dayak onions in fresh conditions toget the benefits of antioxidants.