bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and experimental analysis of UHF sensor spiral antenna for partial discharge detection of distribution network switchgear
Authors: Wu HouFeng , Wu HanRong , Li Ding
Published: February 2022

The ultra high frequency (UHF) sensor antenna for detecting partial discharge (PD) in distribution network switchgear is studied. Because of the long period of insulation deterioration in the switchgear, more attention is paid to the middle and later stage of insulation deterioration, and the frequency of PD signal that needs to be paid attention to is wider. Among the commonly used UHF antennas, Archimedes spiral antenna has a wider working frequency band and excellent low-frequency working characteristics, Therefore, Archimedes spiral antennas of UHF Sensors with different outer diameters are designed by using ANSYS HFSS. The influence of the outer diameter of Archimedes spiral antenna on the S11 parameters of Archimedes spiral antenna is studied, and the partial discharge signal acquisition experiments are carried out. The results show that the partial discharge characteristic signals collected by Archimedes spiral antenna with different outer diameters are different. This provides a theoretical basis for the design of UHF sensor antenna used in switch cabinet.
Fuzzy PID Control of Nonlinear Vibration Isolator with Parallel Electromagnetic Negative Stiffness
Authors: Xie Yingjiang , Niu Fu , Meng Lingshuai , Zhao Wanzhuo , Sun Jinggong
Published: February 2022

A fuzzy PID control strategy for quasi-zero stiffness (QZS) isolator which connects the pneumatic spring (PS) and the electromagnetic negative stiffness mechanism (ENSM) in parallel to suppress low-frequency vibration is proposed in this paper. First, the restoring force of PS and the electromagnetic force of the ENSM are derived. Secondly, the static analysis of the isolation system is carried out, and the analytical expressions of stiffness and restoring force of the vibration isolation system is obtained. The possibility of the vibration isolator reaching the QZS state is explained. Then, to obtain a better isolation effect, the optimal current of the coil is found according to the designed fuzzy PID control strategy. Finally, the simulation result shows that the isolation frequency band of the isolation system under fuzzy PID control and PID control is widened, and the vibration isolation performance under fuzzy PID control reaches more than 85% under different excitation frequencies. Control effect and vibration isolation performance under fuzzy PID control are better.
Application of model-free adaptive temperature control in medium frequency induction heating
Authors: Li Demin , Qin Qingliang , Yang Xiaoqian
Published: February 2022

Induction heating has a series of advantages such as high heating efficiency, low energy consumption, and environmental protection. It is widely used in the heat treatment of metal workpieces. Only when the temperature of heat treatment meets the process requirements can the quality of workpiece be guaranteed, so the temperature control algorithm is very important. The heat treatment requirements of thick wall pipeline are more stringent than those of conventional workpieces, in order to better control the heat treatment temperature, a model-free adaptive temperature control algorithm based on data-driven is proposed. The principle and rationality of the algorithm were analyzed, and the previous process data were analyzed and fitted. Then the controller was designed and tested in the field of thick-wall pipe heat treatment. The results show that this method can improve the accuracy of temperature control, enhance the uniformity of temperature distribution, and meet the requirements of the production process.
Modelling and Simulation of Vehicle ESP System Based on CarSim and Simulink
Authors: Jiang Nanyu , Qiu Runqi
Published: February 2022

In this paper, the simulation of the vehicle ESP system is carried out, and the linear two-degree-of-freedom dynamic reference model of the vehicle is established in MATLAB/Simulink. Combined with the method of direct yaw moment control, the yaw rate and the yaw angle are selected as the control variables. Based on the fuzzy PID control theory, the control strategy of the ESP system is designed to calculate the additional yaw moment required when the vehicle deviates from the desired trajectory. In order to verify the effectiveness of the ESP system designed in this paper, the vehicle dynamics model in CarSim software is used to build a joint simulation platform of CarSim and Simulink, and the model is tested at a speed of 120 km/h on a double lane change road with low adhesion rate. The simulation results show that the designed controller can significantly improve the manoeuvrability and stability of the vehicle.
Research on Single-phase Power Supply in Short-circuit Test of Transformer on Magnetic-force Coupling Field
Authors: Luo Xiaoxiao , Wang Qian , Xiao Qianbo , Sheng Zhiping , Yan Yangtian
Published: February 2022

The short-circuit test is a test of the comprehensive technical ability of transformer manufacturing. The three-phase power supply is usually used for short-circuit test of transformer. To investigate the feasibility of using a single-phase power supply in the short-circuit test of transformer, in this paper, we modeled a 200 kVA power transformer in three dimensions, using the finite element method to calculate the short-circuit current and short-circuit electromagnetic force of the windings under different excitation modes when the three-phase short-circuit occurs in the low-voltage windings. Analyze and compare the short-circuit current and short-circuit electromagnetic force distribution characteristics of windings under different working conditions. The results show that when the three-phase short-circuit condition occurred in the low-voltage windings, regardless of the three-phase excitation or single-phase excitation exerted on the high-voltage windings, the short-circuit current and the short-circuit electromagnetic force of the voltage zero-crossing closing phase is basically the same. This proves that a single-phase power supply can be used instead of a three-phase power supply for short-circuit tests. the analysis result has certain reference significance for improving the short-circuit test of transformer.
Lightweight target shooting image analysis device based on Raspberry Pi
Authors: Lu Siyuan
Published: February 2022

This paper shows a lightweight target image analysis device using Raspberry Pi as the master control, which contains the processing and data analysis of the whole target image, making it easier for the public to perform shooting analysis. System uses Raspberry Pi 4b as the main control, python as the core language, the whole target surface processing is divided into five parts: target ring analysis, bullet point analysis, data processing, data visualization and user interface. The whole system is low-priced, convenient and lightweight, and can be connected to any screen to display the whole shooting process and human-computer interaction. In the test, the system shows excellent recognition accuracy and speed, flexible and simple, and multiple interfaces make the program expansion very accessible. In the subsequent development, it can be combined with deep learning to pool multi-dimensional shooting data as a way to filter out the best shooting groups for subsequent training.
Thermal Management of Multi Core Processor Using U Configured Parallel Microchannel Cooling System
Authors: Mathiyazhagan S , Sirisha Maganti Lakshmi
Published: February 2022

Thriving technologies in the electronics industry demands effective cooling systems for proper thermal management of the devices. To propose an effective cooling system, real-time challenges need to be taken into examination. One of the challenges is the non-uniform heat load emitted by the device. In this paper, a multicore processor has mimicked for the heat load and examined with U configured parallel microchannel cooling system (PMCS) for its capacity to cool the processor effectively. A detailed numerical examination has been conceded out by mimicking the AMD Ryzen-7 octa-core processor for its size, shape and heat load. To make it convenient for applying non-uniform heat load, the shape of the PMCS is divided into 4*4 array of a total of 16 heaters. The present has witnessed that, there is an uneven distribution of fluid flow across the channels. The initial channels do get more quantity of fluid whereas the end channels do get a very less quantity of fluid. Why because of the flow maldistribution, it formed the hot spots (high-temperature zones), which will be further intensified due to the non-uniform heat load emitted by the processor. It perceived from the present numerical analysis, there is a formation of hotspots not only due to the random location of active cores but also due to the flow maldistribution across the channels. The flow arrangement of U configuration having worse flow distribution among other existing configuration. The present work conclusively demonstrates that high maldistribution leads towards dropping the uniformity of cooling. But the existing maldistribution can be effectively exploited to tackle the non-uniform heat load released by the processor when the active core location falls in the place of initial channels.
Recent perspectives and outlook of advances in technologies of solar chimney power plant
Authors: Mamgain Sarthak , Aggarwal Shubham , Sharma Meeta , Kumar Shukla Anoop
Published: February 2022

Abstract Solar chimney technology is a new generative technology that generates electricity from the direct incident solar radiation from the sun. It is a low-temperature operating solar thermal system that generates power on the basis of three technologies (chimney/draft technology, wind turbine technology, and greenhouse effect technology). It consists of three fundamental parts: turbine, vertical chimney of decent height and a collector made up of glass panes to absorb the radiations from the sun. Effective use of this technique can generate electricity in abundance and can operate twenty-four hours nonstop annually and can solve the electricity shortage issue in a country like India where the sunlight radiations are immense in intensity and stretch to the major parts of the country. Since its inception, solar chimney technology has seen prosperous advancement but has not witnessed full-scale utilization because of various techno-economic and environmental aspects. This study discusses the critical review of the solar updraft/chimney technology in various parts of the world and emphasizes its important aspects.
Study of dissipative MHD oscillatory unsteady free convective flow in a vertical channel occupied with the porous material in the presence of heat source effect and thermal radiation
Authors: Sharma Tarun , Sharma Pooja , Kumar Navin
Published: February 2022

The analytical study of MHD oscillatory, unsteady, natural convective viscous incompressible dissipative flow through vertical channel filled with porous medium in the presence of heat source effect and thermal radiation have been discussed. The time-dependent equations of flow scheme such as the equation of fluid motion and heat transfer are derived and solved by a suitable analytical method. The MATLAB software is used to plot the figures and confer the significance of flow parameters on the velocity and temperature field of the flow scheme. In this analysis, it is found that the magnetic field is the main key parameter for optimizing fluid velocity, and this result is helpful for various industries and biomedical fields.
Designing of Parabolic Trough Collector using Plane Mirrors
Authors: Lamba Mayank , Das Subhra
Published: February 2022

Parabolic trough collectors are used for concentrating solar radiation along the focal line. These collectors are commercially used for power generation. Approximately thirty-seven percent of the total cost is attributed to the solar field. In order to increase the economic viability of solar thermal power plants, there is a need to reduce the cost of solar thermal collectors. In this paper, an attempt has been made to reduce the cost of parabolic trough collectors by fabricating them using plane mirrors. In this endeavor, all factors which affect the surface area of the collector have been identified and the impact of rim angle on the surface area of the collector has been studied. It has been observed that surface area decreases sharply with an increase in rim angle from 20-60 and beyond this value, there is a negligible increase in surface area. Thus, a parabolic trough with aperture width 0.5m, length 0.95m, and rim angle of 96 has been considered for designing a parabolic trough collector using plane mirrors.

It has been observed that the use of plane mirrors in place of curved mirrors significantly reduces the cost of manufacturing by 83.33 percent and will give a major boost to the large-scale installation of solar thermal power plants.
Analysing the Institutional building for Solar Radiation and Photovoltaic Energy using AutoDesk-Revit
Authors: Kumar Mukul , Rawat Paritosh , Maurya Amit , Kumar Ravinder , Bharadwaj Ujjwal , Duggal Prakhar
Published: February 2022

Unconventional sources of energy like solar are not only green but sustainable too. Adopting sustainable sources of energy is a futuristic approach. Working in similar directions in current research, paper authors analyzed and modeled various aspects of an institutional building for solar energy suitability and efficiency by using Autodesk Revit software solar Plugin 2021. The various aspects of solar analysis such as sun path, PV potential and solar radiation value are observed and recorded. After ranging the different criteria like PV surface coverage and PV efficiency the mean energy cost tends to be reduced. Authors observed that the energy cost got reduced to 18.8$ from 24.3$.
Energy Sustainable House: A Case study and validation through Revit
Authors: Malik Arjun , Kumar Ravinder , Gupta Rhythm , Vikal Varun , Minhan  , Bhardwaj Ujjwal
Published: February 2022

Reducing carbon footprints and adopting green energy sources is the need of modern time. Green sources of energy need to find preference over traditional sources. Unconventional sources of energy like solar, wind are alternatives of traditional energy sources. Lack of awareness, high initial investment and lack of government incentive are few challenges in adoption of green sources of energy in housing sector, especially in developing economies. Construction, design and aesthetics of traditional residential building have a significant effect on energy consumption and environment. Town planners, private housing developers and individual house owners have to become aware and adopt the non-traditional sources of energy like solar energy for meeting their daily need of energy. An energy sustainable house has minimum dependency on traditional sources of energy like coal based thermal power plants. For moving a step closer to energy sustainable building, in this research paper authors have studied the design, energy consumption and transformation of energy dependencies on roof top solar plant of a residential building by situation actor process & learning action performance (SAP-LAP) methodology. Further authors tried to validate the observations and findings of study by energy balance analysis of the same residential building by Autodesk Revit software. Studying the economical aspect of current case authors observed that the case house got 60% saving in monthly electricity bill after installing rooftop solar power plant and payback period of total investment on solar power plant is 6.5 to 7 years only.
The Analytical Method of the Mechanics Problem Involving a Hyperelliptic Integral
Authors: Zhu Ping , Lu Yufa
Published: February 2022

It is extremely difficult to obtain the analytical solution of some mechanical problems related to elliptic integrals. The motion of a small ball that rolls without sliding on a smooth hemisphere is a typical hyperelliptic integral problem of this kind. By utilizing elliptic integration theory and operational skills, we give the analytical method of the solution of the motion law of the small ball. At the same time, we exhibit the motion characteristic of the small ball.
Discussion on Fast Calibration Method of Coordinate Measuring Machine
Authors: Chen Long , Ren Tingting , Tao Lei , Xiong Jun , Gu Chunyan
Published: February 2022

This article presents a novel design of a device with simple structure, convenient operation and stable performance for fast calibration of coordinate measuring machines (CMMs). The purpose of the design is aiming at the solving the problems of long timeconsuming, high cost and high requirements for calibration personnel during the traditional calibration process of CMMs. The technical specifications of the designed calibration device complies with ISO 10360-2-2009 Geometrical Product Specifications (GPS)-Acceptance and reverification tests for coordinate measuring machines (CMM)-Part 2: CMMs for measuring linear dimension and ISO 10360-5-2020 Geometrical Product Specifications (GPS)-Acceptance and reverification tests for coordinate measuring machines (CMM)-Part 5: Coordinate measuring machines (CMMs) using single and multiple stylus contacting probing systems using discrete point and/or scanning measuring mode. The device can complete the calibration of the CMMs quickly, obtain the size error and probing error of the CMM in a short time, and provide data support for users to determine whether the CMM meets the application requirements.
Sub-grain Boundary Mobility of 6XXX Alloys during Annealing
Authors: Wang Xiaoguo , Liu Fangzhen , Li Yifeng , Nagaumi Hiromi , Qin Jian
Published: February 2022

In this paper, 6061 aluminum alloy and a new type of dispersion-strengthened 6XXX aluminum alloy (named WQ) were compressed to a true strain of 1.2 at a strain rate of 0.1/s at 300/400/500°C and then annealed at different temperatures. The microstructure evolution of both heat treated alloys were characterized by EBSD. The results showed that during the annealing process of the two deformed alloys, the sub-grain size did not increase significantly. Due to the pinning effect of the dispersoids in WQ alloy, the sub-grain size of WQ was smaller than that of 6061 alloy. Under the same deformation conditions and annealing process, the deformation stored energy of WQ alloy was higher than that of 6061 alloy. The deformation stored energy of 6061 compressed alloy was more sensitive to the annealing temperature. Combining theoretical formulas and EBSD data, the sub-grain boundary migration rate curves of 6061 and WQ deformed alloys during the annealing process were obtained, which could provide a theoretical basis for the future study of the sub-grain growth process of multi-element aluminum alloys.
Post-processing optimization algorithm for blade six-axis NC machining
Authors: Cui Chuanhui , Chen Shuai , Si Chuanrui , Ye Huan
Published: February 2022

In order to solve the problem of fluctuation in the six-axis NC polishing machining, in this paper, a post-processing optimization algorithm for six-axis NC polishing machining is proposed, which can solve the problem of fluctuation in the machining process of six-axis NC machining. First, the initial A-axis angle value corresponding to the tool position is solved according to the tool position information contained in the toolpath file; Second, use B-spline to smooth the data of A-axis, and solve the corresponding B-axis and C-axis angle value according to the angle value of A-axis; Third, calculate the moving value of X-axis Y-axis and Z-axis to realize the post-processing of the toolpath file; Finally, the algorithm is verified that it can solve the machine trajectory fluctuation in the current six-axis post-processing using VERICUT and the machining experiments, and realize the high quality six-axis NC polishing machining.
A review of fault diagnosis and fault-tolerant control of vehicular polymer electrolyte membrane fuel cell power system
Authors: Pan Tongyu , Zhang Pei , Du Changqing , Wu Dongmei
Published: February 2022

Proton exchange membrane fuel cell (PEMFC) is a promising vehicle power because of its high energy conversion efficiency and pollution-free reactant. However, the complex structure of multi-system coordination makes the correlation between parameters strong, the fault rate is high and the control is difficult. Timely and accurate fault diagnosis and effective fault-tolerant control are of great significance to the stable output and durability of PEMFC system. Firstly, this paper classifies different faults and describes the applicable scenarios of each classification method. Then, the fault diagnosis methods based on experiment, model and data are summarized, and their advantages and disadvantages are compared. Then, the methods and characteristics of hardware fault tolerance and software fault tolerance are analyzed from the point of redundancy, and the application of fault tolerance control in maintaining the stability of PEMFC system is summarized. Finally, the improvement direction and development prospect of fault diagnosis related technology of vehicle PEMFC system are proposed.
Development of state identification system for whole process of tensile fracture of steel bar based on magnetic field measurement
Authors: Cao Yejun
Published: February 2022

The large and small difficulties during the trial, a lot of places repeated the experiment many times, in order to avoid has omission cause the whole experimental process experiments to be carried out again. The experimental project has a large amount of data, so it is a test of the patience of team members in data processing. When the researchers process the data, you need to import the origin of many data, to draw out the change of the magnetic field intensity and the magnetic field gradient image, and the process we have a good command of origin usage skills, understand how vital it is to process data correctly at the same time, care and patience for scientific research employees are essential. This issue necessitates a greater understanding of mathematics, physics, and chemistry, which is made more difficult by the fact that the process of understanding the principle necessitates the use of these skills. The test results show that there is a good corresponding relationship between the magnetic induction intensity and the stress state of the steel bar. The normal residual magnetic induction intensity and the hysteresis loop area of the steel bar under the action of fatigue load show the three-stage change law of fatigue, which can be further applied to the steel bar. The state of stress is being tested.
Study on Rotating Speed Control of Dissimilar Metal Friction Stir Welding based on Fuzzy PID
Authors: Liu Yongning , Qiao Zhifeng , Liu Qingjian , Huang Jiahao , Fu Kang
Published: February 2022

The demand for lightweight vehicles that achieve energy conservation and emission reduction continues to grow. Aluminum alloys were commonly applied to the automotive industry to reduce the structural quality of the entire vehicle. However, the cost of aluminum alloy was higher than that of steel, so the industry considered the use of aluminum in combination with low-cost materials such as steel. Traditional welding technology was limited by the great physical difference between aluminum alloy and steel. Friction Stir Welding, a solid phase welding technology, can overcome the connection problem of aluminum and its alloys with steel, but the process parameters of FSW directly affect the welding quality. This paper established the FSW process of two different metals of DC05 and AL6061. Aimed to get a good welding joint, the error of tool speed is reduced by fuzzy PID system established in this paper, and the tool speed is controlled stably. Simulink simulation was established, and compared with the simulation results, fuzzy PID control can control the precision and stability of the tool speed of FSW, improve the welding quality, and provide a certain theoretical basis for the tool speed control.
Effects of UIT on Microstructure and Properties of 441 Ferritic Stainless Steel Laser Welded Joint
Authors: Zhao Caiyu , Fan Qiuyue , Yu Haoxuan , Wang Hao , Xu Desheng
Published: February 2022

Effects of UIT (Ultrasonic impact treatment) on the microstructure and properties of laser welded 1.5mm 441 ferritic stainless steel sheets were studied. Results indicate that the surface of the butt joint generated an ultrasonically induced strengthening layer after UIT. The average microhardness of the layer was increased by 18.1%. The tensile strength of the specimens was increased. Moreover, UIT can decrease the residual stress of welded specimens, the maximum longitudinal tensile stress in the central area was decreased by 78.4%, and the transverse residual stress was converted into compressive stress. The cupping value was increased from 34.5 mm to 37.0 mm following UIT. In addition, the fracture position was changed from the central weld to the edge weld of the cupping hemisphere. The mechanical properties were increased due to the generation of strengthening layers and the decrease of residual stress by UIT.
Design and study of microfluidic differential phase surface plasmon resonance sensor
Authors: Liu TianHang , Li SiMin , Deng JunPeng , Wang GuoFu , Liu YanSheng
Published: February 2022

In this project we design and study a differential phase surface plasmon resonance sensor combining with microfluidic technology. The differential phase Surface Plasmon Resonance (SPR) sensor is constructed by applying the Kretschman plasmon excitation structure and combing with interference spectroscopy. Through making use of simulation and experimental method, the principle of SPR sensor is theoretically and experimentally studied. In this project, we apply the SPR sensor in testing urea solution with varying weight concentration. Through the results, it can be observed that the plasma resonance absorption ranges from 640 nm to 840 nm and its detection limits can reach 0.0004 RIU. Due to its tunable plasma absorption and lower detection limits, the microfluidic differential phase surface plasmon resonance sensor illustrates a promising future in chemistry, physics and biology.
Monitoring Fuel Dilution of Diesel Engine Lubricant Oil by Ultraviolet Fluorescence Spectroscopy
Authors: Li Jing , Tian Hongxiang , Yunling Sun , Huang Heng , He Wei
Published: February 2022

Fuel contamination is a common problem in lubricating oil contamination. Generally, methods such as gas chromatography can be used, but the experimental process is more complicated. Fluorescence spectroscopy analysis has the advantages of fast detection speed and high sensitivity. Applying it to fuel dilution analysis can simplify the analysis process and enable rapid and accurate quantitative analysis. A certain type of fluorescence spectrophotometer was used to analyze and monitor lubricating oil containing different proportions of diesel oil. The fluorescence sensitive band was found, and the corresponding relationship between different lubricating oil content and the height and peak area of the fluorescence characteristic peak was analyzed.
Inversion of elastic constants of composite materials by single test based on virtual fields method
Authors: Zhu Rongxin , Jiang Hao , Liu Yan , Lei Zhenkun , Bai Ruixiang
Published: February 2022

In this paper, a method of obtaining four elastic constants of orthotropic composites by single tensile test is proposed. The principle of this method is to obtain the full field strain on the surface of the specimen through the tensile test of the specimen with a specific geometry, and to invert the measured in-plane strain field into the virtual fields method (VFM) to obtain the elastic constants. Based on the deformation field data generated by finite element numerical simulation, the effects of design parameters such as effective length, notch position, notch size and fillet radius on the identification results of elastic parameters of V-notch tensile specimen are studied. The results show that the inversion results of symmetrical V-notch specimen with 50 mm length, 12 mm notch size and 3.1 mm fillet radius are the best, and the sum of absolute relative errors of four elastic constants is less than 3%, which verifies the feasibility of the method.
Readout electronics and data acquisition system of PandaX-4T experiment
Authors: Yang J. , Chen X. , He C. , Huang D. , Huang Y. , Liu J. , Ren X. , Wang A. , Wang M. , Yan B. , Yin K. , Yang J. , Yang Y. , Zheng Q.
Published: February 2022

PandaX-4T is a dark matter direct detection experiment
located in China jinping underground laboratory. The central
apparatus is a dual-phase xenon detector containing 4 ton liquid
xenon in the sensitive volume, with about 500 photomultipliers
instrumented in the top and the bottom of the detector. In this
paper we present a completely new system of readout electronics and
data acquisition in the PandaX-4T experiment. Compared to the one
used in the previous PandaX dark matter experiments, the new system
features triggerless readout and higher bandwidth. With triggerless
readout, dark matter searches are not affected by the efficiency
loss of external triggers. The system records single photelectron
signals of the dominant PMTs with an average efficiency of 96%, and
achieves the bandwidth of more than 450 MB/s. The system has been
used to successfully acquire data during the commissioning runs of
PandaX-4T.
Assembly of skin substitute by cross-linking natural biomaterials on synthetic biodegradable porous mat for critical-size full-thickness burn wound regeneration
Authors: Ramakrishnan Rashmi , Venkiteswaran KalliyanaKrishnan , Sreelatha Harikrishnan Vijayakumar , Lekshman Aishwarya , Arumugham Sabareeswaran , KalliyanaKrishnan Lissy
Published: February 2022

Human skin architecture comprises several interpenetrating macromolecules seen as organized extracellular matrix (ECM). For regeneration of critical-size acute and chronic wounds, substituting the damaged tissue with artificially assembled biomolecules offer an interactive milieu. This study reports development and preclinical evaluation of a biodegradable and immuno-compatible scaffold for regeneration of critical-size (4 × 4 cm2) full-thickness rabbit burn wounds. The designed wound care product comprises synthetic terpolymer poly(L-Lactide-co-Glycolide-co-Caprolactone) (PLGC), human clinical-grade fibrin (FIB), and hyaluronic acid (HA), termed as PLGCFIBHA. Here, clotting of fibrinogen concentrate (FC) with excess thrombin in the scaffold create an interpenetrating FIB network harnessed with adhesive molecules like fibronectin and laminin present in FC with exogenous HA to produce ECM-like milieu on porous PLGC. Penetrating into porous PLGCFIBHA, long term study showed a regulated fibroblast growth resulting in non-fibrotic dermal-like tissue in vitro. The freeze-dried PLGCFIBHA with residual thrombin facilitated suture-less, hemostatic matrix adhesion to the wound bed in vivo. By 28 d, mature and scar-less epidermis-dermis formation with skin appendages was evident in the PLGCFIBHA-treated wound area. Both negative (untreated/sham) and positive (commercial matrix-treated) control wounds showed incomplete regeneration. The PLGCFIBHA-treated wounds were comparable to native skin by 56 d. These regenerative outcomes upon single application of PLGCFIBHA confirms its potential translational value for wound care.
Potential of tamarind seeds (Tamarindus indica L.) as prebiotics on the growth of lactic acid bacteria
Authors: Utami M. M. D. , Dewi A. C. , Ningsih N.
Published: February 2022

The purpose of this study was to examine the potential of tamarind seeds as a prebiotic by conducting tamarind seeds with a temperature and incubation time. Prebiotic testing was carried out using Lactobacillus casei grown on media with the addition of tamarind seeds. The research used a completely randomized design. The temperature was divided into two levels (60 and 70°C) and the incubation time is divided into three levels (120, 180, and 240 minutes). The treatments were T1 (control), T2 (60°C, 120 minutes), T3 (60°C, 180 minutes), T4 (60°C, 240 minutes), T5 (70°C 120 minutes), T6 (70°C, 180 minutes), and T7 (70°C, 240 minutes). Each experiment was repeated twice. Data were analyzed by analysis of variance, if there was a significant effect then continued with Duncan test. Based on the results of this study: tamarind seeds which were incubated at a temperature of 60°C for 240 minutes increased the number of colonies significantly (P<0.05) compared to the incubation time below, incubation tamarind seeds at 70°C increased the number of bacterial colonies significantly (P<0.05) in all-time ranges, however the optimal time 180 minutes. Tamarind seeds have potential as prebiotics, all the parameters showed the ability of tamarind seeds as a prebiotic.
Bio-emulsifier supplementation from Pseudomonas putida that cultivated on medium containing waste palm oil as feed additive on poultry
Authors: Nurhamzah M , Pantaya D
Published: February 2022

The purpose of this study to determine effect of bio-emulsifier from Pseudomonas putida as feed supplement on the performance of broiler chickens. The experiment was divided in two phases. In phase 1: test of oil bubbles formation in water using bio-emulsifier, and phase 2 : in vivo test bio-emulsifier in animal. 200 one-day-old male and female broiler strain Cobb were used. On d 14, chicks were separated by sex and placed in 40 pens, sex separate (100 males or 100 females) and randomly assigned 4 treatments and 5 replicates of 5 birds each for 14 d (21d-35 d). The diets were based of corn, concentrate and rice bran meal and supplemented with: 0, 0.5,1 and 1.5 g/kg bio-emulsifier. The observed parameters were feed intake (FI), average daily gain (ADG), and feed conversion ratio (FCR). Result of experiment 1: as expected, supplementation of bio-emulsifier was increased small oil bubbles formation in medium oil in water, whereas in experiment 2 showed FI, ADG and FCR unaffected by dietary supplementation with bio-emulsifier on broiler at finisher phase (week 4 and 5) (P>0.05) and did not decrease on broiler performance. The results give new information that bio-emulsifier from Pseudomonas putida could potentially as a new alternative feed additive in the future on broiler performance.
Fermentation of soybean meal-hydrolysates as the medium that treated by papain enzyme with Saccharomyces cerevisiae for biomass production
Authors: Pantaya D. , Pamungkas D. , Wulandari S. , Utami M. M. D.
Published: February 2022

The purpose of this study was to determine the effect of soybean meal (SBM) media processing using the papain enzyme on the amino acid content and its effect on yeast biomass production. The study was divided into 2 experimental phases, first test: effect of papain enzyme hydrolysis test on amino acid in soybean meal that treated by boiling and non-boiling medium, second test: yeast biomass production was cultivated using soybean meal hydrolysates as medium with 3 treatments, namely control (- soybean meal), with soybean meal (-enzyme) and soybean meal (+enzyme). Data were analyzed using a completely randomized design with ANOVA and post hoc analysis using Tukey’s multiple range test. From the analysis, it was found that the addition of papain enzymes supplemented on soybean meal medium was affected on crude protein and amino acids composition (L-Arginine, L-proline, L-methionine, and L-phenylalanine). Enzyme treatment on SBM as substrate was increased the yeast biomass compared to control (P<0.01). In conclusion, enzyme treatment on soybean meal was improved the fermentation performance of yeast biomass production
The effect of extorted wet edamame pod liquid waste in chicks performance
Authors: Andriani M , Muhamad N , Sabran  , Syahniar TM , Ratri PR
Published: February 2022

This study aimed to determine the effect of liquid waste from extorted wet edamame pod (LEP) as a natural feed additive added to drinking water in chicks during rearing in a tropical environment. The study was designed using a completely randomized design (CRD) with 3 levels of LEP and 1 control treatment. Each level treatment replicated 4 times with 10 chickens for each experimental unit. The treatment levels were L0=control (using commercial additive based on the product dosage); L1=2.5% v/v LEP; L2 = 5%v/v LEP; and L3=7.5% v/v LEP as additive that added to drinking water. The variables observed broiler performance in the first week starter period which included water intake and feed intake, body weight gain and FCR. The statistical analysis used analysis of variance (ANOVA) then followed by Duncan’s Multiple Range Test (DMRT) when showed significant result. The results presented that the usage of 2.5% v/v LEP increased water intake but presented similar effect on feed intake and the performance of first week broiler maintenance in the tropical environment. In conclusion, the usage of LEP up to 7.5% in broiler drinking water is safe to apply as a natural feed additive without reducing broiler performance.
The effect of phytobiotics ginger (Zingiber officinale Rosc.) extract in drinking water on hematological characters of KUB chickens
Authors: Ningsih N. , Syaikhullah Gayuh , Adhyatma M. , Rofiqi Zainur , Al Huzaini M. F.
Published: February 2022

This study was carried out to investigate the effect of phytobiotics ginger (Zingiber officinale Rosc.) in drinking water on haematological characters of Kampung Unggul Balitbangtan (KUB) chickens. A total of one hundred KUB chickens fourteen days old were assigned into 4 treatments with 5 replicates (5 birds in each replicate). The experimental treatments were control without red ginger extract (T0), drinking water with 0.5% ginger extract (T1), 1.0 % ginger extract (T2), and 1.5 % ginger extract (T3). The basal diet was yellow corn, BR2 poultry concentrate produced by PT Wonokoyo, rice brand, and vitamin premix, which contains 17.07% CP, 3097.79 kcal/kg ME, 0.81% Ca, and 0.56% Pav. Variables evaluated were haematological character of KUB chicken. The results were analyzed using ANOVA in a completely randomized design using Statistical Package for Social Science or SPSS. Duncan multiple range test (DMRT) were used to separate mean of data when p-value differ significantly (P<0,05). Results showed that suplementation ginger extract in the drinking water did not significantly effect haematological character of KUB chicken..
Effect of drying method on the chemical properties of local soy flour
Authors: Suryana A L , Rosiana N M , Olivia Z
Published: February 2022

Soybean is a good source of protein because the nutrition value of soybean protein is equivalent to animal protein. Soy foods have been generally proven to prevent chronic disease, such as antiobesity, antihypertensive, immunity regulation, cholesterol-lowering, lipid-lowering, anticarcinogenic and antioxidant. Moreover, soy food also decreases the prevalence of stunting in toddlers. Soybean in the form of flour can make it easier to process into food, but soy has a bad smell that they don’t like. This aroma can be reduced by heating treatment such as the drying method. So this study aimed to determine the effect of the drying method on the chemical content of soybean flour. Four methods to dry the soybean are sun drying, oven drying at 50°C, oven drying at 70°C hours, and oven drying at 100°C. After drying, the soybeans are roasted for 2 minutes with medium heat. The result shows the drying method affects the moisture, protein, fat, ash, and carbohydrate of soybean flour. Oven drying at 50°C for 3 hours is recommended to use as the best method to produce soy flour due to its nutritional value and has better aroma, sweet taste, light color, and good nutritional value.
Fatty acids and amino acids profile of organic black rice (Oryza sativa L.) milk
Authors: Romulo A , Sadek N F
Published: February 2022

The popularity of plant-based milk has been increasing over the last few years to substitute animal milk. Cereal such as black rice (Oryza sativa L.) is a plant material that can be used to produce rice milk. Black rice has been reported to have high vitamin and mineral content and high fiber. Previous research also has shown the functionality of black rice, such as antioxidant, antihypertensive, and antihyperlipidemic. For this reason, black rice has the potency to be further processed into functional food such as rice milk. However, there is still a lack of basic information about the nutritional profile of black rice milk. Therefore, this research aimed to examine the fatty acids and amino acids profile of black rice milk. Fatty acid analysis was carried out using GC-FID. Amino acid content was analyzed using UPLC. The fatty acid profile analysis revealed that polyunsaturated fatty acid was the most abundant (0.1062%) in black rice milk, followed by saturated fatty acid (0.062%). The highest amino acid found in black rice milk was glutamic acid (0.0045 g/100 mL), aspartic acid (0.00269 g/100 mL), and arginine (0.0228 g/100 mL)
Organoleptic Characteristics of Banana Flakes Based on Maturity Level of Banana (Musa Paradisiaca) CV. Ambon
Authors: Surahman D N , Ekafitri R , Rahman T , Cahyadi W , Setyadi D A , Astro H M , Indriati A , Andriana Y , Anggara C E W
Published: February 2022

Bananas are rich in minerals such as potassium, magnesium, iron, phosphorus, and calcium, contain vitamins A, B6 and C and contain serotonin which is active as a neurotransmitter for intelligence. Bananas can be processed into semi-finished products or finished products. One of the semi-finished products from bananas is Banana Flour. Banana flour is an alternative to banana preservation because bananas are perishable fruits. Banana flour can be made from unripe bananas and ripe bananas. The types of breakfast cereals that are most consumed or preferred by consumers are products in the form of breakfast drinks, extruded products and flakes. Flakes belong to the cereal milk food group. The purpose of this study was to determine the organoleptic characteristics of banana flakes made from banana flour with different ripeness levels of bananas. The research methodology included organoleptic test with the hedonic test method on a scale of 1-7, with a total of 30 panelists. The test parameters carried out include color, taste, aroma, hardness, crunchiness and overall acceptance. The results showed that the sample a1b3 (ripe banana flour, 25 minutes of roasting) was the most preferred by the panelists, with test values for color 5.40, taste 5.90, aroma, 5.63, hardness 5.50, crispness 5.67, overall admission of 6.07.
Effect of banana flour and tempeh flour on sensory characteristics of prebiotic snack bar
Authors: Purnasari G , Sasmita I R A , Susindra Y
Published: February 2022

Prebiotic snack bar is a food innovation in the form of a bar that contains a source of functional nutrients that can improve chronic small intestinal inflammation syndrome (pediatric environmental enteropathy) in stunting children, increase the absorption of nutrition, and then improve the nutritional status of stunting children. The aim of this research was to determine the sensory characteristics of snack bar with any level of banana flour and tempeh flour addition. Sensory analyses were carried out on flavor, color, taste, texture and overall of the snack bar. The results showed that the ratio of banana flour : tempeh flour (95% : 5%) was more acceptable in terms of flavor (3,89), color (3,60), taste (3,91), texture (3,77) and overall (4,00). The result also showed that the addition of tempeh flour and banana flour to the formulation snack bar had a significant effect (p ≤ 0,05) on the sensory quality of prebiotic snack bar
The teaching factory (TEFA) pilot project of transportation system engineering as an opportunity in the department of engineering at Politeknik Negeri Jember
Authors: Irawan A , Pratama A W , Rachmanita R E
Published: February 2022

The pilot project of Teaching Factory (TEFA) at the Department of Engineering, Politeknik Negeri Jember as an effort to realize TEFA in the field of transportation system engineering, including mapping the potential and opportunities for the realization of Technical TEFA by considering several product groups plans, including the production of spare parts (Y1), services (Y2) and bio-fuel production (Y3). The problem is the need to identify with potential mapping whether TEFA pilots in the Engineering Department can be recommended to be realized. Potential mapping aims to provide an output of consideration in realizing TEFA in the Department of Engineering through several stages of the process, the first method is GADM (Grid Analysis Decision Making) as a model for providing recommendations in realizing TEFA by giving a score from the questionnaire to partners, the second method with the CIPP stage (Context, Input, Process, Product) as a consideration of the service process chain flow and products that will be produced from the three products. Potential mapping is carried out by means of questionnaires to partners spread across 4 sub-districts, Jember Regency with consideration of the radius of the mapping distance of 5 km from the Politeknik Negeri Jember. Respondent partners are used as the basis for considering feasibility in establishing TEFA in the Engineering Department. The questionnaire to productive partners in the automotive sector grouped into four sub-districts obtained a mapping of a total of 100 partners from Sumbersari, Patrang, Kaliwates, Ajung with a number of 35, 14, 17 and 34 partner respondents respectively who were considered as candidates for collaboration in pioneering TEFA in the Department of Engineering. The GADM results provide a questionnaire score for each sub-district average from product groups Y1, Y2 and Y3 with a score of 3.2, 2.9 and 3.4. The partner’s choice of the highest score is biofuel (Y3).
Thermo-environmental economic study on energy conversion system using thermoelectric generators (TEG SP1848) in cold storage condenser
Authors: Rachmanita R E , Prasetyo D
Published: February 2022

Thermoelectric generator is an alternative energy that utilizes temperature differences into electrical energy. The use of a thermoelectric generator (TEG SP1848) by utilizing a heat source from the exhaust heat of a cold storage condenser requires thermodynamic, environmental thermal, and techno-economic analysis. The method used in this study is a qualitative approach with descriptive and evaluative methods. Thermodynamic analysis of the amount of heat wasted at each position of the engine pipe obtained T1 pipe 38613.47 Watts, T2 pipe 3960.35 Watts, and T3 pipe 39651.80 Watts. The SP1848-based TEG energy conversion device absorbs 11.14 watts of heat energy placed in the T3 pipe and has an efficiency of 0.23%. Analysis of the environmental conditions of the cold storage engine room based on the Predicted Mean Vote (PMV), Predicted Percentage Discomfort (PPD) and Temperature Humidity Index (THI) values shows that the engine room environment is not comfortable for human activities and can disrupt the balance of human metabolism. Techno-economic feasibility evaluation based on Net Present Value (NPV) and Payback Period (PBP) produces a negative value, while Benefit Cost Ratio (BCR) is 0.0012, indicating that the conversion tool is not feasible to run.
A SCADA/PMU hybrid measurement state estimation method considering load uncertainty
Authors: Huang Tianen , Sun Hao , Wu Zhenjie , Zong Xingchen , Li Yuxiao , Wang Yuantao , Tang Jian , Li Xiang , Mo Yajun , Li Chengda , Xu Shuangdie
Published: February 2022

This paper proposes a power system state estimation method combining the Monte Carlo method and the SCADA/PMU hybrid measurement state estimation algorithm. Quantify the impact of load uncertainty on the state estimation results to reduce the influence of power system measurement error. The results show that the method takes into account the uncertainty of load measurement and the influence of flexible load, and accurately estimate the operating state of the power system.