bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bioactive compound content and antioxidant activities of analog rice enriched with the germinated of white corn (zea mays) and the germinated of mung bean (vigna radiata)
Authors: Nugraheni M , Purwanti S , Ekawatiningsih P 
Published: March 2021

Abstract
The research aimed to know bio-active compounds’ content and antioxidant activity of rice analog based on germinated white corn (Zea mays), germinated mung bean (Vigna radiata) and white sweet potatoes. There were several stages: first, the formulation of analog rice—the second analyzes of total phenol and flavonoids content. The third is the analysis of antioxidant activity done by DPPH, FTC, and TBA methods. Results showed that formulation I TPC levels are 385.00 ± 0.04 (mgGAE/100g), TFC 267.60 ± 0.42 (mgQCE/100g). Formulation II TPC levels are 379.20 ± 0.85 (mgGAE/100g), TFC 235.40 ± 0.92 (mgQCE/100g). Formulation III TPC levels are 346.50 ± 0.85 (mgGAE/100g), TFC 227.00 ± 0.42 (mgQCE/100g). Antioxidant activity formulation I with DPPH method: 67.71 ± 0.20%; The percentage inhibitory with the FTC 69.10 ± 1.01%, TBA 65.28 ± 0.28%. Antioxidant activity formulation II with DPPH method: 66.57 ± 0.20%; The percentage inhibitory with the FTC 60.63 ± 0.81%, TBA method 64.42 ± 0.58%. Antioxidant activity formulation III with DPPH method: 63.57 ± 0.20%; The percentage inhibitory with the FTC 45.41 ± 0.30%, TBA 63.21 ± 0.58%. There is a significant and positive correlation between bioactive compounds with three methods of antioxidant activity used.
Fuzzy logic based on image processing to control a dc motor
Authors: Khairudin M , Yusuf D M , Yatmono S , Azman M N A , Asmara A 
Published: March 2021

Abstract
Image Processing was a form of processing of input data signals in the form of images. This input image was transformed into another image with certain techniques. The techniques used in image processing were intensity adjustment, histogram equalization, thresholding, motion blur, canny and median filtering. Image processing could be used to do tracking. This tracking was a job to follow the movement of the object caught on the camera. Tracking using image processing could be utilized in various fields. In this study, the DC motor control system was discussed by utilizing image processing to detect hexagon shaped objects. In addition to detecting the shape that was detected, this image processing was also to detect color. The color of the detected object was orange. This motor speed followed the object’s motion horizontally. So, if the object was shifted to the right, the system will rotate slowly, whereas if it was moved to the left, the system will rotate quickly. This motor control used a PG45 motor, webcam, and personal computer. The success of reading the location of the area and providing PWM output on the motor achieved almost match between simulation and experiment.
The effectiveness of implementing ANEKA-THK-based countenance evaluation application at IT vocational schools in Bali
Authors: Divayana D G H , Adiarta A , Ariawan I P W 
Published: March 2021

Abstract
Successful implementation of an application on a large scale depends on the effectiveness of the operational test results on the application. The main objective of this research was to demonstrate the effectiveness of the implementation of the ANEKA-THK (ANEKA-Tri Hita Karana)-based Countenance evaluation application at IT Vocational Schools in Bali. This research was development research with the development model was the Borg & Gall that focuses on the operational test phase to obtain the effectiveness level of implementing the evaluation application. A total of 114 people were included as respondents in this research. Questionnaires were used as tools for assessment in the operational test by respondents. The analysis technique was used in this research was quantitative descriptive, so that the results were obtained in the form of an effectiveness percentage of the implementation of ANEKA-THK-based Countenance evaluation application was 88.67% from usage test results by experts and 89.93% by teachers and students.
Absorption level vocational high school graduates in industrial
Authors: Hidayatuloh M K Y , Muslim S 
Published: March 2021

Abstract
This study aims to analyze the absorption of vocational students’ graduates on the fulfillment of the workforce in their area based on the suitability of their competencies. This study uses a quantitative approach in describing the level of absorption of graduates in the world of work with documentation that has been carried out at vocational high school in Jombang Districts. The subjects used in this study were data from all students of vocational high school in Jombang Districts at the field of technology and engineering expertise for three periods (2018, 2017, 2016). The findings of this study are the absorption of graduates in vocational high school in Jombang Districts is quite high because it is included in the category of most of the graduates can be absorbed by industry with the greatest absorption rate of ME expertise programs in the amount of 94.97% and the lowest absorption rate of BDE expertise programs at 65, 20%. However, the absorption of industry graduates outside Jombang Districts.
Development and validation of video-based learning media to increase competency achievement in civil engineering education
Authors: Daryono R W , Rochmadi S , Hidayat N 
Published: March 2021

Abstract
The purpose of this research is to develop and know the performance of video animation-based learning videos for measuring pegs from road curves, in the Geomatics Practice subject for civil engineering education students, and to find out the level of feasibility of instructional videos developed in the application of vocational practice learning processes. This type of research is research and development (R&D) that uses the 4D model. Data collection uses interviews aimed at lecturers who teach in vocational practices and questionnaires to assess eligibility in the context of media and materials, which aimed at media experts, material experts, and students who are analysed using quantitative data. The results of the feasibility of developing video animation on material expert perceptions obtained a value of 82.121% which is included in the very feasible category, the perception of media experts obtaining a media value of 93.444% included in the very feasible category, students’ perceptions get a value of 88,136 which is included in the very feasible category.
Analysis of variable valve timing intelligent mechanism of gasoline performance
Authors: Abadi A H , Suhartono R , Efendi A , Pratama R Anugrah 
Published: March 2021

Abstract
This study aims to determine the operational performance of the engine with the mechanism of the variable valve timing intelligent, testing the performance of the engine on the parameters of thermal efficiency, power, fuel consumption, and exhaust gas results. All tests weres conducted using the dynotest, and the fuel consumption was measured using the flowmeter technogerma. The data obtained will then be processed and the calculation of the performance of thermal and power efficiency using the calculation method using the Otto constant volume cycle. The results of testing the engine’s operational performance with the mechanism of variable valve timing intelligent are expected to get the results of the thermal volume constant indicator of 0.50-0.70, the value of the generated power of 69kW at 6000 rpm, torque of 122 at 4200 rpm, and the results of material consumption specific fuel below 270 g/kW.h or around 0.200-0.220 kg/PS. Hours.
The influence of industrial work practices and workshop infrastructure facilities on work readiness of students
Authors: Setyadi M R A , Triyono M B , Daryono R W 
Published: March 2021

Abstract
This study aims to determine the influence of industrial work practice and workshop facilities on work readiness in class XI mechanical engineering. The research subjects were 101 students of class XI mechanical engineering, using the ex post facto research method using statistical analysis using the SPSS program. The results of the study are as follows: (1) Industrial work practices have a positive effect on job readiness with a significance of 0.000, a determination coefficient of 30% has an effect; (2) Workshop infrastructure has a positive influence on work readiness with a significance value of 0.000, 28.6% determination efficiency has an effect; (3) Industrial work practices and infrastructure together have an influence on job readiness indicated by a significance value of 0.000 having a coefficient of determination 58,6% in influencing job readiness.
Transesterification of jatropha curcas oil for biodiesel production Over NiO catalyst
Authors: Mirzayanti Y W , Asri N P , Marlinda L , Muttaqii M A l 
Published: March 2021

Abstract
The research paper deals with Jatropha curcas oil’s transesterification process using the NiO catalyst as a heterogeneous catalyst to produce Biodiesel. The batch reactor in this process. Excess methanol is needed to shift the equilibrium towards the product and enlarge Biodiesel. The research study about the effect mole ratio of methanol: Jatropha curcas oil. The ratios are 12:1, 15:1, 18:1, and temperature of the reaction of 60, 65, 70°C. Experiment verification of the predicted yield and characterization of Biodiesel produced. The analysis biodiesel product by Chemical characterization using Gas Chromatography (G-C) analysis and ASTM 6751 standard used for the physicochemical properties. The maximum process conditions for the biodiesel yield by transesterification of Jatropha curcas oil over NiO catalyst 59.8% and the mole ratio of 15:1 methanol: Jatropha curcas oil. The 65°C reaction temperature used in this process enhances the transesterification reaction by observing 5 hours with a high yield of Biodiesel.
The influence of Overall Thermal Transfer Value (OTTV) on building energy consumption
Authors: Muhfizaturrahmah  , Yuniarti N , Sukisno T , Urdifat Y 
Published: March 2021

Abstract
Air Conditioning (AC) system is one form of energy consumption which heavily loads the total energy usage in a building. It is essential to find relation between power used by AC to design factor of a building. Numerous countries have been using Overall Thermal Transfer Value (OTTV) as consideration in designing energy efficient buildings. Indonesia even regulated it on SNI 03-6389 2011 on energy conservation of building envelopes. In this paper, we will discuss how OTTV derived from façade measurements and find its correlation to power of those air conditioners consumed.
The effect of additional silicone and handling temperature on draw strength and microstructure in aluminum casting
Authors: Suheni  , Syamsuri  , Suryanto M B , Lillahulhaq Z 
Published: March 2021

Abstract
Aluminum-silicon castings (Al-Si) is commonly used for excellent low-cost cast ability and varied microconstituents. The mechanical properties of Al-Si alloys are related to the size, morphology, and distribution of the primary and eutectic Si phases. The irregular-shaped primary and the acicular eutectic Si phase induce stress concentration at the tip of secondary phases, which occurs at the crack origin. This condition results in deterioration of ductility. This study discuss on the effect of composition percentage and pouring temperature of Al-Si alloy at various content of 7%, 12% and 15%. The pouring temperature will be varied at 570 ° C, 600 ° C and 650 ° C. The highest value of the tensile test for Al-Si alloys was owned by the Al 12% Si mixture at the pouring temperature of 600 oC. This condition is due to the occurrence of the eutectic mixture which has a non-lamellar shape and appears in the cross-section of the microstructure. The visible section consists of like pieces that appear separate but are actually interconnected when viewed in three dimensions. As a result of the formation of nonlamellar regions and the existing shale connections, it is difficult to shift when given the test load.
Development of the weaving home industry through the use of natural dyes in the east rabadompu village of bima city
Authors: Wiraningtyas A , Ruslan  , Sandi A , Nasir M 
Published: March 2021

Abstract
Problems encountered in the development of the weaving home industry inthe East Rabadompu Village, Bima City as an export commodity include: Bima woven fabric products use yarn raw material that has been colored using synthetic dyes thereby reducing the artistic value and exotic side. Although synthetic dyes have a more diverse color, they do not fade easily, are easily produced, the fabric coloring process is easier and the cost is cheap. However, synthetic dyes are carcinogenic and dangerous for the environment. The solution to overcome these problems is to use natural dyes obtained from plant extracts in the form of root, bark, stem, leaf or fruit. Natural dyes have many advantages, including colors that are more natural, cool, unique and beautiful in accordance with the characteristics of natural colors, waste produced more environmentally friendly (biodegradable), the availability of abundant raw materials (renewable). In this activity, natural dyes are made from indigo leaves, yellow bark, mahogany bark, java bark, brown seaweed, areca nut and noni root. The resulting yarn colors consist of black, maroon, pink, beige, gray and purple.
Stress Analysis of Thick-Wall Hollow Functionally Graded Material Based on Plane Strain Problem
Authors: Lin Wenfeng 
Published: March 2021

Abstract
In this study, the mechanical behaviours of thick-walled hollow functionally graded material (FGM) cylinder subjected to uniform pressures at inner and outer surfaces are proposed. The hollow FGM cylinder has variable geometric profile, thickness and material properties like elastic modulus and mass density are all assumed to vary radially according to exponentially-varying functions in radial direction. With the help of the infinitesimal elasticity theory and plane strain assumption, analytic solutions of stress and deformation are proposed. Numerical example is given to show the performance between FEM and homogeneous cylinder. Finally, summary and the future work are presented at the end of the paper.
Computational Models of Magnesium Medical Implants Degradation: A Review
Authors: Zhang Xuanbin , Hao Zhixiu 
Published: March 2021

Abstract
Magnesium is attracting the attention of researchers from medical field especially implant material due to its properties, including but not limited to degradation and biocompatibility. Many chemical and physical reactions are considered to play a part in the procedure of magnesium degradation and influence the bio-tissue. To design and analyze magnesium implants, it is important to fully consider the factors that will affect the degradation and the impacts on the mechanical property as well as the in-vivo environment. Computational model gives another way to capture and analyze the in-vivo degradation behavior of the magnesium besides experiment. A review of the current computational models which could be used in study of magnesium medical implant is presented here, with the main mechanisms and accomplishments of each model highlighted.
The Detection of Acetylcholinesterase Based on All-Dielectric Nanoantennas
Authors: Ouyang Ao , Zhou Huan , Ghosh Pintu , Li Qiang 
Published: March 2021

Abstract
High sensitivity detection of acetylcholinesterase (Ache) concentration is an important method for water pollution control and treatment. Compared with commonly used detection methods, the dielectric nanoantenna detection method is more direct, efficient, and safer. In this paper, we first studied a silicon disk dielectric antenna for the detection of Ache. We made the structure by electron beam lithography technology and set up the optical system of spectrum measurement. We used the electrical resonance position of its transmission spectrum to calibrate the refractive index of the surface environment, and the sensitivity reaches 222nm/RIU. We introduced the chemical bond coupling method to monitor the Ache concentration changing process, and there is no need to mark the detection substance by modifying the surface of the antenna structure and fixing the antibodies of the substance to be monitored. We achieved the specific monitoring process of Ache concentration, and the minimum detectable concentration is 0.01mg/ml.
Design of Multifunctional Touch and Slip Sensor System Based on PVDF Piezoelectric Film
Authors: Li Xiang , Ming Zhe , Wang Keyi 
Published: March 2021

Abstract
A multi-functional touch slip sensing system is designed based on PVDF piezoelectric film. The piezoelectric sensor converts the pressure signal into electrical signal through piezoelectric effect, and the conditioning circuit further processes the electrical signal. After A/D conversion, the data is transferred to the upper computer to extract the information. In addition, based on the thermoelectric effect of piezoelectric film, the sensor can detect the thermal sensation signal and has the function of self-protection. The piezoelectric sensor adopts bionic fingerprint structure, which has high sensitivity and good flexibility. The conditioning circuit includes amplifying unit, filtering unit, voltage lifting unit and voltage following unit. These units are integrated on the circuit board of 11mm*10mm, which has high integration and easy application. The experiment verifies that manipulator equipped the sensing system can automatically judge tactile, slip and thermal sensation, and can grasp an egg and a paper cup with water, realizing the ability of soft grasping.
Epigenetic Formation of Clay Surface Properties: Experimental Modeling
Authors: Sofinskaya O A , Usmanov R M 
Published: March 2021

Abstract
Quaternary diluvium soil samples were tested for particles’ cohesion, contact angle, porosity and their geoengineering properties were compared. The effect of particle size, applied external pressure, hy dration and the presence of organomineral surfactants on the soil surface properties of a clay preparation was evaluated. These characteristics determine the strength of clay particles’ cohesion to each other and are important for the development of techniques for geoengineering management. The macroscopic wetting contact angle was estimated using the captive bubble method by the author’s technique. An external pressure in excess of 40 kPa applied to a clay preparation on a glass substrate results in more than one layer of clay particles due to cohesion. It was observed that the thickness of the clay layer retained on the preparations due to cohesion decreases during hydration. This decrease is more noticeable for samples with particles up to 45 μm compared to samples containing larger particles up to 250 μm. The positive effect of organomineral surfactants on the cohesion of clay particles has been established. The addition of these surfactants initially leads to an increase in wetting heterogeneity.
Study on SO4
2- Removal with Ettringite Precipitation Approach in Wet Desulfurization of Firing-Power Plant
Authors: Niu Guangling , Li Yuzhong , Huang Yue , Qin Wu , Xiao Xianbin , Zheng Zongming 
Published: March 2021

Abstract
The deacidification treatment of desulphurization wastewater is one of the difficulties in clean discharge of power plants. Ettringite precipitation is a new method of acid removal in recent years, but its efficiency is affected by many factors, and the mechanism is still unclear. In this paper, we studied the effects of the molar ratio of calcium to sulfur ([Ca] / [S]), the molar ratio of aluminum to sulfur ([Al] / [S]) and pH on the deacidification of ettringite precipitation approach, and found the optimum conditions were as follows: pH=12, [Al] / [S] = 0.67, [Ca] / [S] = 2. Based on the optimal level, the effects of high contents of Mg2+, Cl−, Na+ and NO3+ in desulfurization wastewater on the removal of SO4
2− by ettringite precipitation were studied. It was found that Mg2+ could inhibit the formation of ettringite precipitation.
Research on the Design of Aging Leisure Landscape in Community
Authors: Wang Yaying , Gao Chenglin 
Published: March 2021

Abstract
In order to investigate the aging life needs of the old community square in Beijing, the factors influencing the daily communication space of the elderly were obtained. Based on the analysis of the current situation of community square for the elderly in Beijing, this paper puts forward the principle of public, social and private communication space, and classifies and reorganizes the activity space and designs and constructs it. Taking Beijing Bell and Drum Tower Square as an actual case, this paper analyzes the space renewal strategy, explores and perfects the orderly old community square function and the improvement design of square space. This paper puts forward the existing problems and suggestions in the layout and construction of old urban squares in Beijing, so as to update and improve the functions of community cultural squares.
The Influence of Human Activities on Pollutants Distribution in Waiting Rooms of Outpatients in Health Care Buildings
Authors: Chen Min , Gong Jiafu , Lv Mengqiu , Zhang Jishun , Yin Yintao 
Published: March 2021

Abstract
Unsteady CFD simulation with SST k-ε model and dynamic mesh was used to investigate the characteristics of human walking and how the human activities influence the pollutants distribution in outpatient waiting rooms of health care buildings in this study. The results show that apart from the differences of gender and age, the movement speed of personnel is also greatly influenced by the subjective factors, and the step size is obviously less affected by the subjective factors and greatly affected by physical health and body shape. Numerical simulation results show that when the fine mannequin is used, the wake produced by the forward movement of the leg is obviously smaller than the wake area after the body and arm. The pollutants are enabled to diffuse faster but without increasing the concentration because of swinging the hands and feet of the moving human body, the thermal plume of the body, and the faster moving persons. When moving the same distance, the concentration of contaminant caused by the wake behind the body changes the same.
Investigation on Numerical Simulation of Radiation Heating Thermal Environment in Car Cabin
Authors: Liu Weijun , Ji Wei , Du Xinghui , Fu Yunzhun 
Published: March 2021

Abstract
Based on the automobile energy saving and requirements for thermal comfort of heating environment in a car, a capillary radiation heating system for automobile is presented, and the 3D flow field and temperature field of air in the passenger compartment are simulated by using SC/Tetra software. To consider the effect of human thermoregulation, human thermal regulatory model is incorporated with numerical simulation. The thermal comfort of passenger compartment is evaluated by PMV-PPD comfort index basing on the simulation results. It concludes that the distributions of flow field and temperature field of radiation heating environment are relatively homogeneous. Human thermoregulation has a big influence on the temperature distribution in the near region around the human body. Analyzing the PMV values of body surfaces, it concludes that the radiation penal surface temperature should be set to 30°C under the most comfortable environment for human. The research results provide basis for the using of radiation heating technology in a car.
Discussion on Spontaneous Parametric Down-conversion (SPDC) Based on Parametric Oscillator Model
Authors: Peng Yu , Wu Minghe , Chen Sheng , Fan Zhibin 
Published: March 2021

Abstract
In this article, we use the theory of simple harmonic motion to estimate the vibration energy of Boron atom. Subsequently we employ the parametric oscillator model to discuss photon pairs with wavelength of 710 nm. When a laser with wavelength of 355nm illuminates the barium meta-borate crystal, parametric resonance could lead to the effect of spontaneous parametric down-conversion.