bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of PjBL-STEAM model toward students’ problem-solving skills on light and optical instruments topic
Authors: Anindya F A U , Wusqo I U
Published: July 2020

One of the challenges of today’s education in the disruption era is generating skillful, creative, and innovative human resources in solving problems. Therefore, a learning model to train students’ problem-solving skills is required. The objective of this research is to analyze the influence of PjBL-STEAM toward students’ problem-solving skills indicated by the average differences. The data were collected through test, documentation, and observation. The influence of the model was examined using a t-test. Further, the analysis showed that there was an average score difference between the students taught using the PjBL-STEAM and the students taught using the PjBL-scientific model by 3.495. In other words, the PjBL-STEAM model has a positive effect on the students’ problem-solving skills.
The analysis of wastewater management at small and medium textile (batik) enterprises in Pekalongan city
Authors: Zaenuri  , Dwidayati N
Published: July 2020

This study intended to analyze the wastewater management at Batik small and medium enterprise (SME). The study took place in SMEs at two boundaries in Pekalongan City. The research subject was the businessmen of SME. Observation and interview were employed to collect data and were analyzed descriptive-comparatively. The results showed that the Pekalongan City Government had built a Waste Processing Unit (WPU) in Jenggot Village and WWTP (Wastewater Treatment Plant) in Kauman Village. The operation of WPU and WWTP still needs optimization by increasing the participation of SME entrepreneurs/craftsmen so that environmental damage due to wastewater produced by textile SMEs (batik) can be minimized.
Soil and banana crops (Musa paradisiaca L.) risk by chromium (Cr) accumulation through leachate and its health risk assessment
Authors: Primandani A , Sajidan  , Masykuri M
Published: July 2020

The leachate efluen of Semarang landfill is directly flew to the upper course of Kreo river is a fact that make Kreo river is possibly contaminated by heavy metal. Many banana trees are planted around the contaminated0soil. This study was conducted to determine Cr toxicity on banana trees that grow on contaminated soil and to determine public health risks that is caused by leachate of Semarang landfill. The measurement of bioaccumulation factor as the basic data for environmental safety and as the evaluation of wastewater processing is conducted through Cr level measurement. The research shows 1) Cr concentration on WWTP Jatibarang Semarang landfill’s efluen leachate in the rainy season exceeds the environmental safety limit. 2) Cr concentration in the water before and the after of efluen leachate contamination is under the standard. 3) Cr contamination in the soil around Jatibarang landfill’s efluen leachate contamination area exceeds its limit. 4) The bioconcentration factor shows the banana trees can accumulate Cr from soil to the tree. 5) Most of Cr accumulation in the banana trees is translocated to the air and to the root of the tree. 6) The banana plants such as root, stem and pseudostem from the Cr contaminated soil is safe for consumption.
Effectiveness of in-service professional teacher education online system (PPG) on non-productive teachers towards productive teachers of kemenristekdikti in cosmetology education on State University of Jakarta
Authors: Nursetiawati S , Josua D P
Published: July 2020

Educational evaluation is one of the supporting factors for quality in education itself. The digital age places education to continue to make updates, especially on online programs. In addition to educational equipment, the education system also increases the competence and qualifications of educator resources, one of which is through PPG Ristekdikti. The successful implementation of online system programs in education can include participants’ understanding of online learning media, ease of access, and observation during implementation. This research is a qualitative research that describes the facts and phenomena of online programs from Teacher Professional Education (PPG). This study involved 29 teachers who participated in the PPG Cosmetology program. Based on the results of observations, interviews, and the value data obtained by participants, the online system of the PPG program is quite good because it is considered flexible. Other factors that inhibit the PPG program online system include; (a) management scheduling each assignment, (b) the age of participants who are no longer young, it is quite difficult for participants to understand learning technology online, and (c) in connection with the transfer of programs, not all teachers are able to master cosmetology material.
Developing the integrated SIMPAKDOS and its impact on employees’ intention to promote academic position
Authors: Martono S , Prayitno I B N , Sutikno  , Nurkhin A
Published: July 2020

This study aims at developing an integrated Management Information System for Lecturers Credit Score Assessment (SIMPAKDOS). This research is an R&D research conducted in March-September 2018. The system itself is developed by conducting FAST method (Framework for the Application of Systems Techniques). Data collection methods used are interviews, questionnaires, and documentation. The data analysis method used are descriptive analysis, FGD (focus group discussion), and linier regression analysis. The development of Integrated SIMPAKDOS has been finished with the FAST approach. The results of the needs analysis show that the lecturers and staffs need Integrated SIMPAKDOS with approved content and conditions. The logical design prepared has been through FGD, expert validation, and trials to obtain input and validation from various stakeholders. System validation is carried out in two stages (development expert validation and system content expert validation) and the results show that Integrated SIMPAKDOS is valid and feasible to use. The test results also show that the interest of lecturers applying for promotion is included in the very high category, which is as many as 65% after using SIMPAKDOS. The use of Integrated SIMPAKDOS proved to have a positive and significant effect on the intention of lecturers to propose rank promotions.
Need assessment developing multimedia interactive learning of geometry as instructional media
Authors: Budiarti W , Triyono M B
Published: July 2020

Multimedia Interactive learning is a learning media that combines sound, visual and text elements and can interact with users. This study aims to obtain information about the development needs of interactive multimedia learning material building space and learning media formulations that need to be developed in mathematics learning material building space. The study was conducted in the form of teachers needs assessment instruments which were analyzed using qualitative descriptive. The results showed that the use of learning media as a learning resource in the mathematics learning process had been carried out in the field, but the implementation was not optimal, that are: 1) there were obstacles in the delivery of material, especially material that could not be directly observed, 2) building material including material that difficult in delivery, the teacher needs media that can visualize the building of space for fifth grade elementary school and explain in detail and correct the types of building space so that there is no misunderstanding of students in mathematics building material, 3) the format favored by children are games and tutorials.
The psychological impact of students choosing the department at SMKN 2 Yogyakarta
Authors: Putrianti L , Astuti B
Published: July 2020

This study aims to find out how the psychological impact of students who are forced by parents in choosing majors at SMKN 2 YOGYAKARTA. Factors causing major discrepancies taken due to the compulsion of parents. Parents should discuss in terms of children’s interests and talents, so that children can freely develop their talents and interests. this study uses a descriptive qualitative approach, with a type of case study research. The subject of this study was the tenth-grade students at SMKN 2 Yogyakarta. Data collection techniques using the method of observation, interviews, and documentation. Test the validity of using a test of credibility by passing. Data analysis techniques that will be performed in this study using Creswell The school, especially the teacher, seeks to give attention and motivation to students so that students can perform well.
Dimethyldecanal Analysis on Body Extract and Head Space Sampling Method
Authors: Subekti N , Saputri R , Partaya  , Kartika T
Published: July 2020

Tribolium castaneum is warehouse pest for flour comodity. The usage of chemical pesticide to control Tribolium castaneum is harmful to humans and environment. One of effective and eco-friendly method is utilization of dimethyldecanal spesific pheromone which act as attractant that affect both sex. The purpose of this research is to analyze the influence of dimethyldecanal towards flour beetle behaviour respons. This research conducted by sample preparation, dimethyldecanal extraction, like dislike assay, and GC-MS analysis. Dimethyldecanal extract was obtained using body extract and head space sampling methods was then tested for its effectiveness in influencing the behavior of Tribolium castaneum using like dislike test and analyzed using GC-MS. Like dislike test based on One Way Anava analysis showed that there was significant difference between dimethyldecanal extract from body extract and head space sampling in influencing the behavior of Tribolium castaneum (P = 0.001; P <0.05). Based on GC-MS analysis, dimethyldecanal compounds can only be detected in head space sampling extract. Like dislikes test result and GC-MS analysis showed that dimethyldecanal can be extracted using head space sampling method but cannot be extracted using body extract method.
The Effectiveness of guided inquiry model with starter experiment approach towards critical thinking skill in understanding fungi material: an experimental study on the first students of senior high school
Authors: Wardani I , Djukri
Published: July 2020

Competency result is a major problem encountered in school level education. This research aims to investigate the effectiveness of the guided inquiry model with a starter experiment approach towards the students’ critical thinking skills. Using a quasi-experimental design, this research took a sample of 64 students of X MIPA1 and X MIPA5. A technique in selecting the sample was cluster random sampling. To collect the data, the test was utilized. The data analysis was performed using the normality test, homogeneity test, and ANCOVA test with the significance level of 0.05. The mean of the posttest result was 84.14%. The improvement of critical thinking skills was 42.89%, compared to the result of the pretest. This research shows that the guided inquiry model with a starter experiment approach had a significant effect on the students’ critical thinking skills in understanding Fungi material.
The effects of family ecology learning on student university environmental awareness
Authors: Nursetiawati S , Atmanto D , Josua D P
Published: July 2020

Family Ecology is one of the learning materials in the Cosmetology Study Program, Jakarta State University. The aspects studied include; education about environmental care, and the balance between the environment and family units. This study aims to look at the influence of learning experience, and the absorption of material obtained by students in family ecology material, on environmental awareness. The sampling method uses a purposive technique. This study involved 75 respondents by taking research locations at Jakarta State University in the Cosmetology study program. Respondents were involved, overall female sex. The method used in this study is a regression analysis approach with Partial Least Square. Data collection was conducted using a Learning Experience questionnaire, Level of Understanding of Materials in Family Ecology Learning, and Environmental Awareness. The results showed that there was a positive influence between students ‘knowledge gained, after studying family ecology material with students’ awareness of the environment. Thus, it can be concluded that the science concept, as well as the application of family ecology learning can be used as one of the factors that fosters students’ love for their environment.
Profile of the integration of earthquake precursor animal knowledge in animal ecology course
Authors: Fadilah M , Permanasari A , Riandi R , Maryani E
Published: July 2020

Earthquake experts have stated that the western coastal region of Sumatra Island is one of the most earthquake-prone areas in Indonesia. In response to this fact, disaster mitigation education programs must involve preparedness and preparedness before an earthquake occurs. This preliminary study aims to describe the profile of integration of biological studies, especially earthquake precursors in animal ecology lectures at the Biology Department of the Faculty of Natural Sciences (FMIPA) Padang State University (UNP). Data collection is done through analysis of lecture documents, surveys and interviews, and data analysis is done descriptively by referring to Hsieh and Shannon (2015) in Malekipour et al., (2017). The instruments used were a checklist of lecture content, semi-structured questionnaires, and interview guidelines. The results of the study show that the lectures on animal ecology in the Department of Biology FMIPA UNP have included the application of basic ecological concepts in everyday life. However, the area of application of these competencies is limited to conservation goals and how to treat animals in the student environment. The study of animal behaviour as a marker of earthquakes has never been integrated and applied in lectures on theory and practicum. Students’ knowledge of animal behaviour in an earthquake event is mostly obtained independently from books and articles. From the results of the study, it can be concluded that the lecture on animal ecology is a potential lecture to examine the relationship between animal behaviour and earthquake disasters. Furthermore, it can be recommended integration of the behaviour of earthquake-related animals in animal ecology lectures for prospective biology teacher students, especially in practical learning. It aims to improve the ability and contribution of prospective teacher students involved in anticipating the impact of the earthquake on students living in disaster-prone areas, especially on the west coast of Sumatra.
Carbon emissions of manufacturing companies in Indonesia stock exchange: a sustainable business perspective
Authors: Solikhah B , Wahyudin A , Subowo
Published: July 2020

Economic growth is followed by increasing carbon emissions today. Therefore, the issue of the green industry is a crucial need to be formulated by the government, academics, and companies. The lack of disclosure regarding carbon emissions in the Indonesia Stock Exchange company represents less awareness of the importance of reducing carbon emissions. The purpose of this study is to investigate carbon emissions in registered manufacturing company of Indonesia Stock Exchange. There are 40 manufacturing companies included in this study from 2012 - 2015. Data collection used content analysis which carbon emissions disclosure data measured by indexes. It divided into 5 fields which are Climate Change (CC), Greenhouse Gas (GHG), Energy Consumption (EC), Reduction and Cost (RC) of Greenhouse Gas and Accountability of Emission Carbon (AEC). The results of this study indicated that the level of disclosure of carbon emissions in manufacturing companies in Indonesia was low with an average value of 18.79%. It showed that company management awareness is an effort to reduce carbon emissions was still ineffective. Hence, it needs control from government, stakeholders, and related parties to issue the regulations for supporting companies to be aware of the environment especially carbon emission. Besides, it is essential to build sustainable business based-oriented in 3 things, economic, social, and environmental.
The effectiveness of mobile learning role play game (rpg) maker mv in improving students’ critical thinking ability
Authors: Rasyid A , Iswari R I , Marwoto P , Rinto
Published: July 2020

The aim of this research were to improve students’ critical thinking and to know students’ responses in applying mobile learning RPG-based maker MV in Ecosystem learning. This research is experimental research by using quasi-experimental design with Randomized control-Group Pretest Posttest. The data was taken qualitatively by using observation results during students’ learning, students’ response questionnaire in experiencing mobile learning RPG based maker MV, and quantitative data of students’ critical thinking ability. The research findings showed (1) applying mobile learning RPG based maker MV had medium level, (2) Mobile learning RPG maker MV had improved students’ critical thinking, and (3) Students’ result after using this aplication of Ecosystem learning system in a good level or in the highest score.
Fabrication and analysis of radiation dose for elastic lead polyester composites as a glass coating
Authors: Septiano A F , Sutanto H , Susilo
Published: July 2020

Radiation affecting the human body can cause harm to workers from the lightest to the most fatal. As a result of these interactions, cells can undergo structural changes. Therefore a radiation shield is needed for radiation protection purposes. In this research, a polyester composite sample was made with a variation of lead doping concentration and illumination strength test using a flux meter to determine the permeability of the sample to light, as well as an X-ray radiation absorption test of the sample as desired by the lead polyester being able to be an alternative from the constituent materials of lead glass as a radiation shield that has the advantage of a high level of elasticity so as to minimize the risk of damage (break). Obtained the best mixture composition of 30% Lead Acetate and 70% Lead Polyester, with a radiation exposure test of 35 µSv the results of the radiation absorbing dose on the thickness of the 15mm lead resin layer and Transparency test with an inhibitory value of light of 394 Lux from an initial light source of 700 lux and the rest of the light that is able to penetrate a sample of 306 Lux
Fuzzy logic for landslide susceptibility level in kecamatan Ungaran Barat
Authors: Fianti  , Rahayuningsih O D , Aryani N P , Yulianti I
Published: July 2020

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.
RETRACTED: Technology Related to Agricultural Transformation and Development based on 5G Technology
Authors: Wang Feng
Published: July 2020

The era of 5G comes quietly, along with the improvement of network operation speed, it also promotes the transformation and development of agriculture, which conforms to the development status of China’s 5G technology and the objective law of agricultural development. Under the guidance of technology and concept, 5G is used to promote agricultural modernization.5G technology will definitely build a new generation of high-speed, instantaneous and secure intelligent information infrastructure in an all-round way, which also means that the information transmission network built by 5G technology will have a comprehensive and profound impact on all aspects of social life.Starting from the current agricultural situation, policy support and development prospect, this paper analyzes the factors restricting China’s agricultural development, and puts forward a series of technology-related studies by using the advanced and scientific nature of 5G technology.Results indicate that young people use the Internet accounted for the biggest is as high as 43.58%, young people can drive in the network platform to promote sales of agricultural products, helping new agricultural development pattern, in order to obtain the professional knowledge of agriculture, 31.47% of farmers are willing to use 5G technology, contribute to the intelligent agricultural technology update and the popularity of e-commerce of agricultural products, it also promoted the agricultural reform and transformation.
Production Reserves Sstimation Technology and Research Method Based on Computer Aided Technology
Authors: Wei Tian
Published: July 2020

With the development of oil exploitation, the technology of oil exploitation is becoming more and more perfect. Affected by the imbalance of storage and production, oilfield production capacity is in a floating state. Due to the relatively few unexplored resources, the sustainable development of oil fields is limited to some extent. Therefore, it is an important way to effectively reduce the risk and improve the development efficiency to evaluate and analyze the unused reserves and select the appropriate development method. The development of computer aided technology is expected to improve this shortcoming. Taking the undeveloped reserves of an oil field as an example, this paper USES computer aided technology to select the corresponding parameter sequencing method and analyze the exploitation potential of each layer block, so as to facilitate targeted research and formulation of plans and lay a solid foundation for improving the comprehensive development benefits.
Research on the Technique of Singing Legato in Piano Works Based on Computer Synesthesia Analysis
Authors: Zheng Tian
Published: July 2020

The word synaesthesia is derived from the ancient Greek word synesthesia. "Synesthesia" is composed of the ancient Greek word "SYN" (meaning together and simultaneously) and “AIST-HEIS” (meaning feeling and perception). That is to say, when we feel a system stimulation, the feeling of one or more other react system will be independent, to produce this kind of phenomenon is due to the system of multiple senses of the body, and this kind of linkage is also known as synesthesia activities, is the human common natural phenomena in the process of mental activity. Computer synesthesia analysis also plays an important role in piano works.
Research on Aerobics Teaching Based on Big Data Micro Classroom
Authors: Ma Tianmei
Published: July 2020

With the continuous progress and innovation of the network era, people’s life is more and more scientific and intelligent. In this case, the traditional teaching method is no longer suitable for today’s education field. According to a large number of studies by experts, it is found that the learning style of big data micro classroom is gradually accepted by all walks of life. Big data micro classroom is a new teaching method. It is the innovation of information technology and educational means. Its emergence gradually aroused the interest and enthusiasm of the majority of educators. This paper mainly expounds the practice and research of the application of big data micro classroom in Aerobics major in the field of physical education. Aerobics course in the course of teaching needs to carry out a lot of gymnastics action explanation. Therefore, the researchers think aerobics major is more suitable to adopt the teaching method of big data micro classroom than other majors.
To Explore the Inheritance of Computer Multimedia Art Design Based on Traditional Chinese Cultural Elements
Authors: Liu Tong , Xiang WenXin
Published: July 2020

With the development of computer digital media technology, computer multimedia art has emerged as a new art form.In China, it is very important to embed multimedia art in traditional Chinese culture, draw nourishment from traditional Chinese cultural elements, and give it a national character.This paper USES computer multimedia technology to discuss how to inherit and realize multimedia art design based on traditional Chinese cultural elements by analyzing the opening ceremony of the Beijing Olympic Games and the China pavilion of the Shanghai world expo, because they are the perfect combination of Chinese traditional culture and multimedia art.
The Application of Artificial Intelligence in Computer Web Technology in the Era of Massive Data
Authors: Tao Zheng , Ye Qiong
Published: July 2020

With the rapid progress and continuous innovation of web technology and information technology, our society has entered the era of massive data. The application of computer web technology in various fields has raised people’s living standard to a new level. In recent years, the introduction of artificial intelligence makes the development of computer technology faster. At the same time, it also brings great convenience to human beings. Researchers found that the comprehensive application of artificial intelligence and computer web technology can well deal with the problems of computer web technology. In this paper, artificial intelligence in the background of the era is the research object. This paper discusses its application in the web technology of computer, and finally gets the conclusion.
On the Relationship between the Development of Computer Technology and Track and Field Training Informaionization
Authors: Dong Wei
Published: July 2020

With the continuous increase of national quality and national scientific research strength, China pays more attention to the development of sports. The combination of computer technology and sports has greatly promoted the progress and renewal of sports in China. According to the foreign sports training information system, Chinese researchers put forward the construction of our sports training information system. As a part of sports events, the training of Chinese athletes’ track and field events should also be innovated by information technology. This paper analyzes and discusses the relationship between the development of computer technology and track and field training information system, and finally comes to a conclusion.