bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fuzzy logic for landslide susceptibility level in kecamatan Ungaran Barat
Authors: Fianti  , Rahayuningsih O D , Aryani N P , Yulianti I 
Published: July 2020

Abstract
Landslide is one of the disasters that often happened in Indonesia. A way to prevent the damage effects of landslide is maping potential landslide areas. The purposes of this study is leveling of landslide susceptibility in Ungaran Barat based on geographic-topography condition by using fuzzy logic developed in MATLAB. The geographic-topography conditions used as input variables are rainfall quantity, land slope, and soil type. This research was started by choosing geographic-topography data, studying their correlation to landslide susceptibility, and then developing fuzzy logic, finally building a program for getting the level of landslide susceptibility of each observed area. Fuzzy logic developing consisted of fuzzyfication, fuzzy rule preparation, inference engine preparation, and defuzzification. In this fuzzy logic, the fuzzy rules were constructed by IF-THEN relations, the fuzzy method was Mamdani with centroid defuzzification method. Result showed that there were two levels of landslide susceptibility, i.e. no risk and low risk.
Learning Cycle-based Ethnobotany: Improving Science Process Skillss for the Pharmaceutical Vocational Students
Authors: Rinto  , Iswari R. S. , Marwoto P. , Rasyid A. 
Published: July 2020

Abstract
The present study examines the implementation of learning cycle-based ethnobotany to the concept of plant classification. This study aims to portray the effectiveness of learning cycle-based ethnobotany in improving the science process skillss of the pharmaceutical vocational students and to obtain the students and teachers’ responses about its implementation. This study applies a quasi-experimental method with the randomized pretest-posttest control group design for the students in the tenth grade of pharmaceutical vocational schools around Cirebon Regency. The sampling technique was conducted by cluster random sampling. Then, several procedures of data collection were used which included pretest and posttest, observation sheets to assess the learning process and questionnaires to acquire the students and teachers’ responses about the implementation of learning cycle-based ethnobotany. The data was analyzed through t-test statistics for mean differences. The results revealed that the average values of N-gain for the science process skillss we are 0.402 for the control class and 0.487 for the experimental class. The highest value of N-gain the control class achieveds was 0.561 while the lowest value reacheds 0.093. Both the students and the teachers provided positive responses toward its implementation. In conclusion, learning cycle-based ethnobotany can more significantly improve the science process skillss of the pharmaceutical vocational students than conventional learning can.
Arduino-based object rotator for modified 3D Micro-CT for non-destructive testing application
Authors: Susilo  , Darsono T , Taufiq U A , Setiawan R , Masturi  , Yulianti I 
Published: July 2020

Abstract
This paper presents the development of an object rotator to be applied in digital radiography to modify it as 3D micro-CT. The device was developed using I2C LCD display, tactile buttons and a stepper motor with an L293D motor shield. The first development stage was testing all components. The circuit was designed and then realized using the components that were tested. The device was designed to rotate discretely from rotation angle of 0 – 360° in 256 steps. For performance testing, the device was tested for a rotation angle range of 0° to 90°. The images of each rotation were captured and measured by Inkscape to determine the magnitude of the rotate angle of the object rotating device. The measurement results are compared with theoretical data to determine device error. The highest error was 4.79%. The device was then applied in digital radiography as an object rotator so that the digital radiography functioned as a micro-CT. By using a phantom as an object, the device as an object rotator in micro-CT was tested. The results showed that the device could capture and develop a 3D image of the phantom.
Problem solving based physics learning strategy to enhance students’ higher order thinking skills
Authors: Silitonga H T M , Panjaitan M , Supriyati Y 
Published: July 2020

Abstract
Higher order thinking skills (HOTS) in learning that would be needed in the 21st century. This study probed the effect of utilizing problem-solving strategy while learning physics. The sample of this study is two classes from the second year of Senior High School in Pontianak. Qualitative and quantitative research methods were applied to identify students’ HOTS, to analyze students’ score and acquire the effect of problem-solving strategy after students learning physics. The result shows that student’s physics HOTS who studied by problem-solving strategy is higher than students’ by rehearsal strategy. Thus indicates that problem-solving strategy can be effective to enhance students’ HOTS of physics. The pedagogical implication is discussed on the use of problem-solving strategy as an alternative strategy for physics teaching.
A first-principles study on the quantum tunneling of methylhydroxycarbene isomerization in various solvents
Authors: Susanti E D , Rusydi F , Puspitasari I , Fadilla R N , Aisyah N D , Ahmad A 
Published: July 2020

Abstract
Quantum tunneling phenomenon allows a high-barrier reaction to occur even though thermal energy is not sufficient to surmount the barrier. The phenomenon has been suggested to exist in the isomerization of methylhydroxycarbene which occured at 11 K. Here we study the quantum tunneling that occured in the isomerization of methylhydroxycarbene to acetaldehyde and to vinyl alcohol based on density functional calculations. The isomerization pathways are determined under the effect of various solvents which are modeled by polarizable continuum model (PCM). We use Wentzel-Kramers-Brillouin (WKB) approximation to calculate the tunneling probability (T) and extend the usefulness of T into isomerization rate. The results show that the solvents give a significant effect on the isomerization rate of methylhydroxycarbene to acetaldehyde but an insignificant one on the isomerization rate to vinyl alcohol.
Development of precision pump and high voltage DC-regulator for electrospinning apparatus: experimental test with preparation of PVA microfiber
Authors: Faizal F , Al-Fikri A M , Abdurrochman A , Joni I M , Panatarani C 
Published: July 2020

Abstract
A digital “micro-controller-based” electrospinning apparatus was developed. The system mainly used a precision pump equipped with 20 kV and a high voltage DC regulator utilizing a used flyback transformer. Electronic circuit and power blocks evaluation has shown the linear characteristic. The setting parameters such as flow rate and total volume were calibrated by using a measuring-cylinder and a digital stopwatch. The result showed a linear trend, verified by the correlation coefficient between given and measured flow rate at R≈1. The precision pump can operate at 0.5 ml/hour (8.3 micro-liters per minute) using the 12 ml standard syringe. An 0.5 mm inner diameter needle was used in the integrated experimental and performance test. The testing material was the polyvinyl alcohol (PVA) solution at ambient condition (room temperature and standard pressure). At fix 12 cm distance between electrodes, one hour experiment, and flow rate variation. Some experimental tests resulted in membranes contained 36-61 microns diameter of stacked PVA fiber. Finally, the microfiber diameter distribution was analysed using image processing software. The result showed the dependencies of the size distribution to the flow-rate and applied voltage.
The difference between several methods of sound power level for determining the sound energy emitted by a sound source
Authors: Purwanto B , Sabrina M , Rusjadi D 
Published: July 2020

Abstract
It is needed noise control by limiting the sound energy emitted by the source. The total sound energy emitted by a sound source in all directions per unit time is called sound power. There are several methods for measuring the sound power level emitted by a sound source. This study is comparing the sound power levels of a reference source Brüel&Kjær Type 4204 using sound pressure done in anechoic rooms and hemi-anechoic rooms method (ISO 3745), using reverberation test rooms method (ISO 3741), and using the sound intensity method (ISO 9614-3). This study result that there is a small difference between those methods.
The traceability of acoustics measurement in Indonesia nowadays
Authors: Rusjadi D , Putri C C , Palupi M R , Dwisetyo B , Utomo F B , Prasasti N R 
Published: July 2020

Abstract
Acoustics or sound measurement has an important role in industrial and environmental noise control, hearing health checks, and building acoustics. Therefore to ensure the acoustics measurement results, the acoustics instruments used in the measurement should be calibrated and traceable to a reference standard. Acoustics measurement traceability has been established in Indonesia, however, in the year 2019 coupler method for SLM calibration and audiometer calibration have been added to comply with the acoustic traceability needs. This paper gives a brief description of acoustics measurement traceability that is applied by the National Measurement Standard (SNSU) for Acoustics and Vibration of National Standardization Agency of Indonesia (BSN) nowadays in Indonesia.
Gamma ray dosimeter using Ag-Tragacanth gel
Authors: Astuti M , Imawan Cuk 
Published: July 2020

Abstract
Silver nanoparticles can be synthesized through gamma ray irradiation and provide a localized surface plasmon resonance (LSPR) effect in the visible light so that it can be used as a dosimeter with the colorimetric principle. This article reports experimental results of radiosynthesis of silver nanoparticles in the medium of Tragacanth gum irradiated with gamma rays. The source of gamma rays is Cobalt-60 with varying doses between 1 - 40 kGy. The gel of AgNO3-Tragacanth which was originally clear starts to turn yellow at an irradiation dose of 10 kGy and becomes darker yellow with increasing radiation dose. The absorbance spectrum of the gel was characterized by using UV-visible instruments and give a maximum absorbance value at a wavelength of 403 nm which is a characteristic of LSPR of the silver nanoparticles. This maximum absorbance value increases with increasing radiation dose. These results indicate that the Ag-Tragacanth gel can be used as a gamma ray dosimeter.
Comparative study of conceptual design of gas-cooled fast reactor core type tall versus pan cake based on MCANDLE-B burn up strategy
Authors: Monado F , Ariani M , Royani I , Su’ud Z 
Published: July 2020

Abstract
Comparative study of the conceptual design of Gas-cooled Fast Reactor (GFR) core type tall versus pancake based on modified CANDLE-B (MCANDLE-B) burnup strategy has been done. MCANDLE-B is a burnup strategy that utilizes natural uranium or depleted fuel as its input cycle. The conceptual design of a reactor core that compared is the tall cylinder and the pancake cylinder. In this case, the fuel used is U-10%Zr, SS-316 as a cladding material and helium as a coolant. The total volume of the two reactor cores is the same, namely 15.4 m3. SRAC 2K6 software with PIJ and CITATION modules is used to carry out simulations. The PIJ module is used for fuel cell calculations and the CITATION module is used for reactor core calculations. The results of the comparison show that the pancake core allows the reactor core to use fuel with a volume fraction of 50%: 10%: 40%, for fuel, cladding and coolant respectively. The design obtained can be operated for 10 years without refueling.
Optimized core design for small long-life gas cooled fast reactors with natural uranium-thorium-blend as fuel cycle input
Authors: Ariani M , Supardi  , Johan A , Monado F , Su’ud Z , Sekimoto H 
Published: July 2020

Abstract
Nuclear power is the use of nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity. Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of uranium. The alternative fuel was thorium with the key similarity is that both can absorb neutrons and transmute into fissile elements. Thorium is approximately three times as abundant as uranium in the earth’s crusts, reflecting the fact that thorium has a longer half-life. However, thorium is a fertile material that could not react spontaneously. It needs to be mixed with fissile materials such as uranium or plutonium. Optimized core design and fuel management for small long-life gas cooled fast reactors (600 MWt GCFR) has been performed. The fuel core regions are subdivided into ten parts (region-1 until region-10) with the same volume in the axial direction. The fresh natural uranium-thorium blend is initially put in region-1, after one cycle of 10 years of burn-up it is shifted to region-2 and region-1 filled by fresh natural uranium-thorium blend fuel. This concept is basically applied to all regions in axial core, i.e. shifted the core of (i) region into (i+1) region after the end of 10 years burn-up cycle. For the next cycles, we will add only natural uranium-thorium blend on region-1.The calculation results show that the composition of the fresh fuel for the optimized core consists of 60% thorium-232 and 40% natural uranium.
Study on performance characteristics of thermoelectric generator string
Authors: Mahardiono N A , Haiyunnisa T , Firmansyah R W , Purnama I 
Published: July 2020

Abstract
A thermoelectric generator (TEG) converts thermal energy directly into electrical energy. The principle work of this device is known as a Seebeck Effect. The TEG can be used effectively to harvest low thermal energy to power a low power Wireless Sensor Node (WSN). As the same as solar cells, the TEG connection can be a distributed string either in parallel or in series. However, the performance of the TEG string due to the inhomogeneity temperature gradient in each TEG is still not well investigated. This paper presents the effect of the inhomogeneity temperature gradient on the performance characteristics of the TEG string. The test is carried out using a Thermoelectric Cooler (TEC) as a thermal source on the TEG string. The experimental result is provided to verify the performance of the TEG in various cases of this inhomogeneity temperature gradient.
The effect of bioprocess product of coconut husk on the stability of ration water, durability and floatability of fish feed
Authors: Haetami K , Abun  , Junianto  
Published: July 2020

Abstract
Physical characteristics pelleted non-extrusion containing bioprocess product of coconut husk, has been investigated. The study was designed experimentally using a Completely Randomized Design (CRD), five treatments were repeated three times. Five treatments included the use of bioprocess product of coconut husk fermentation (CHF) as much as 0%, 25%, 50% and 75% as substitution of conventional raw material energy source on pelleted formulation, and control (floating pellet). The parameters measured were sink speed test, durability test, stability test and moisture content test. The effect of each treatment on parameters was analyzed using Analysis of Variance (ANOVA) and continued with Duncan’s Multiple Distance Test. The results showed that bioprocess did not show a significant difference on durability, but product of coconut husk additive feed increased stability of ration water, breaking speed and sinking speed. Stability of ration water with the addition of coconut husk fermentation 75% CHF was significantly higher than other CHF treatments, but not significant different with control pelleted. Stability of ration water in 25-75% CHF treatments. after 120 minutes ranging from 75.93% -81.77%, with pellet durability of 93.33-98.84%.
Distribution dose profile of Computed Tomography (CT) along the z-axis with pitch variation: in-house phantom study
Authors: Marwazi  , Lestariningsih I , Nurlely  , Soejoko D S 
Published: July 2020

Abstract
Computed Tomography (CT) is an x-ray modality for scanning organ in three dimensional images. Image acquisition is performed by rotating x-ray tube that match with table movements, there by the tube can cover patient body in a spiral scan. Patient table movements by gantry rotation divided by the width of the collimator on the isocenter is known as a pitch, which affects the image quality and radiation dose in the patient. A dose distribution profile has been observed along the z-axis of the in-house thorax phantom simulation in an elliptical cylinder form with the size of 28 cm x 21 cm and 22 cm length. Phantom was equipped with a lung simulation object using a cork with a Hounsfield Unit (123.1 HU), a spine using Teflon material (918.6 HU), and 9 bar and a cylinder to place 1 cm x 25 cm gafchromic films. The position of the film was marked with point position 1 – 9 for the series of coordinates (0,0), (5, 0), (10, 0), (-5, 0), (-10, 0), (0, 4), (0, 8), (0, -4), (0, -8) cm. The phantom images were performed with an exposure condition by 120 kV, 100 mAs and pitch variations (0.8, 1.0 and 1.5). The minimum dose occured at the beginning and end of the scan for all profiles and pitch values. The average dose of lung material (1, 2, 4, and 5) in the range 2.32-2.88 mGy for pitch 0.8 and 1.0 respectively, and 2.25 -2.68 mGy for pitch 1.5. The dose in lung was relatively lower compared to the dose in soft tissue and bone. The maximum dose does not always occur in the middle of the z-axis, but it was fluctuated as it was influenced by the pitch values in the range of 10 - 12 cm. It can be concluded that the use of pitch 0.8 and 1.0 did not provide a significant dose difference and reduced the average dose on pitch 1.5. Moreover, the maximum dose does not always occur in the middle of the z-axis due to an isotropic material.
Designing phantom in-house for quick check computed radiography (CR) and digital radiography (DR) system
Authors: Muharam R , Lestariningsih I , Nurlely  , Soejoko D S 
Published: July 2020

Abstract
Computed Radiography (CR) and Digital Radiography (DR) are digitalized radiography systems which have connection between image quality and dynamic-characteristic dose that quality control becomes important for a patient. Phantom quick check with CR and DR system are designed to observe parameter of image quality, spatial resolution, signal nose to ratio (SNR) and detectability. The preparation phantom was designed with acrylic 25 cm x 25 cm x 1 cm that has well objecs with the diameters from 5 mm to 25 mm and depth 1 mm to 8 mm also Aluminium with 15 mm x 15 mm and thickness of 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm. Radiation quality beam or RQA 5 has found to measurement standard in general radiography. The result is SNR graphic versus object for each depth and give information to select objects. From graphic, contrast linier object and detectability is selected for a phantom design. The image from quadrant I could be used to analyse linearity pixel value. Quadrant II could be used to analyse detectability object size. Quadrant III and IV could be used to analyse the resolution spatial. Meanwhile, the point object was used to evaluate the spatial resolution with MTF measurement and Line pair bar. Based on the conducted trial test on the in-house phantom and the image result from each quadrant, further study will be performed to ensure that this in-house phantom will be usable for quick check at hospitals.
Subduction modelling by Tomography inversion around Lombok
Authors: Palupi I R , Raharjo W , Alfiani O D 
Published: July 2020

Abstract
In July 2018, Lombok Island in Indonesia shaked by earthquake of Flores Fault. The earthquake is felt in surounding Lombok like Bali. There are two major earthquake source in Lombok, they are Flores fault in the north, and subduction zone in the south. There are more than 300 fatalities of human, and more than 270.000 refugees. The government of Indonesia established that Lombok Earthquake was a national disaster. This research is aimed to describe how the subduction zone around Lombok both it come two major of earthquake source and to answer the rumor is the earthquake affect Rinjani vulcano in Lombok activity or not.
Coupled Discrete-finite Element Method for Settlement Analysis of Transition Zone between Ballasted and Ballastless Track with Polyurethane Reinforcement Based on Computer Aided Technology
Authors: Shao Shuai , Ji Danyang 
Published: July 2020

Abstract
This paper presents a coupled discrete-finite element method for the dynamic analysis of the transition zone between a ballasted and ballastless track with polyurethane reinforcement. The discrete element and finite element methods are employed to model the ballast bed and ballastless track slab based on computer aided technology, respectively. Ballast bond models are developed at the particles’ contacts to simulate the polyurethane reinforcement of ballasts. A contact algorithm based on static equilibrium is proposed at the interface between the ballasted and ballastless section. To realize a gradual change in stiffness and differential settlement in the transition zone, a multi-level transition is set up from the ballasted to ballastless section by changing the bonding depth. The settlements of different points in the transition zone are obtained and compared. The effect of ballast polyurethane reinforcement is studied.
RETRACTED: Research on the Influence of the Integration of Public Art and Computer on Urban Culture from the Perspective of Media Ecology
Authors: Lu Siyu 
Published: July 2020

Abstract
With the deep integration of computer technology and public art, the digital characteristics of public art become more and more obvious[1]. The digital public art takes the public environment of the city as the carrier, which occupies every corner of the city and develops steadily. The diversified performance media and all-round sensory experience make it an alternative public art with unique expressive force. At present, the manifestation of digital public art tends to be diversified, and its influence on urban culture is more and more profound and complex. Therefore, from the perspective of Media Ecology, this paper explores the characteristics of public art in the computer age. On this basis, this paper analyses the impact of public art integrated with computer technology on urban culture, which provides a new thinking direction for the harmonious development of public art and urban culture.