bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Effect of Key Technological Parameters on Molten Pool during Selective Laser Melting Processing
Authors: Wang Wentong , Tang Linfeng , Chen Congyan , Li Yu , Zhou Tao 
Published: November 2021

Abstract
Selective laser melting (SLM), as an emerging technology in additive manufacturing, often has various defects in the forming process. To ensure the consistency and stability of the parts forming quality, the effects of two typical technological parameters, laser power and scanning speed, on the temperature of molten pool are investigated in this paper. Firstly, the temperature field of Ti-6Al-4V is simulated theoretically via ANSYS software, and the effects of two typical technological parameters on the temperature field are studied. Then, in the experiment, using the designed radiation monitoring device and Ti-6Al-4V powder as forming material, the influence of these two typical factors on the state of molten pool is studied. The simulation and experimental results show that the temperature of molten pool shows positive correlation with the laser power and negative correlation with the scanning speed. This will provide a certain reference value for upgrading and optimizing SLM equipment.
Numerical Simulation of Internal Flow Field of Self-Designed Centrifugal Pump
Authors: Wang Xin , Zhang Jun , Li Zongshun 
Published: November 2021

Abstract
The two self-designed of centrifugal pump with small vane and centrifugal pump without small vane were simulated numerically to select a centrifugal pump with higher efficiency. The internal flow characteristics of the centrifugal pump was simulated by using Reynolds time-averaged N-S equation and RNG turbulence model to obtain pressure and velocity distribution and the cavitation characteristics were simulated by using SST turbulence model and Schnerr-Sauer cavitation model to obtain the gas volume fraction distribution. The results show that at the same flow rate, the change of velocity in the pump cavity of centrifugal pump with vane is smoother and the gas volume is less, but the back-flow is aggravated near the small vane, especially when interacting with the tongue, and a large amount of gas is generated at the suction surface of the small vane. In addition, the efficiency of centrifugal pump without vane is higher than that of centrifugal pump with vane, which provides a basis for the structural optimization of centrifugal pump.
Preparation and Application of CQDs/Ni(OH)20.75H2O as Electrodes in Supercapacitors
Authors: Zhou Yunlong , Fu Hanxiu , Peng Junwen , Chen Weize , Cen Kunfeng , Lv Jingru , Cao Xiaofen 
Published: November 2021

Abstract
In this paper, a hydrothermal synthesis method for preparation Carbon Quantum Dots (CQDs)/Ni(OH)20.75H2O composite electrode material, and loaded on Nickel Foam(NF) by rolling method. The crystal phase, structure, morphology and the reaction process were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The electrochemical properties of the composite were measured by cyclic voltammetry impedance spectroscopy and couple method charge-discharge techniques. The results showed that the composites material was evenly adhered to nickel foam. When the current density is 1 A g−1, the specific capacity of CQDs/Ni (OH) 20.75H2O composite can reach 2115.4 Fg−1, which is close to 5 times of Ni (OH) 20.75 H2O electrode material.
Study on the Calculation Method for Pumping Process in as Vacuum System
Authors: Huang Si , Guo Jiawei , Yi Tiankun , Li Songfeng , Wu Taizhong 
Published: November 2021

Abstract
The calculation methods for vacuum system pumping were usually based on some simple theoretical models, the corresponding results had significant deviations from actual situations. In this study, medium and low vacuum systems (including vacuum chambers, pipes and pumps) were taken as research objects. With a measured vacuum system, and relationship between pump’s suction flowrate and inlet pressure, a new calculation method for vacuum pumping time was proposed, in which laminar or turbulent model was selected according to the pipeline’s flow state. New and traditional laminar method were used to calculate the pumping process of the measured system, which found that in the middle and high pressure stage, the pipeline flow was in turbulent state and the resistance was non-negligible. If the influence of turbulence was ignored, the calculated pressure drop would be faster than actual situation. The calculation result was verified by actual measurement result, indicating that new method is practical for vacuum pumping time calculation.
Research of Pressure Fluctuation with Experiment and Numerical Simulation for Dredging Pump
Authors: Liu Mingming , Zhuang Haifei , Cao Lei 
Published: November 2021

Abstract
In order to reveal the dredge pump flow instability characteristics, the cavitation and pressure fluctuation in experimental study are carried out, the pressure fluctuation frequency domain and time domain characteristics of three different position inside the volute are analyzed. The results showed that, before cavitation, the main frequency at different positions at different flow rates is 1 times the main frequency of the blade. The fluctuation amplitude near the volute tongue and diffusion section is slightly larger than that at other positions. Before cavitation, the fluctuation amplitude at the same position off design flow is slightly higher than that near the design flow. Cavitation has little influence on the main frequency of the pressure fluctuation. After cavitation, the pressure fluctuation amplitude in the low flow point and the position of the volute tongue under each condition has little change, but cavitation aggravates the pressure fluctuation in the other conditions. Besides, the comparison between simulation and experiment results shows the dredge pump performance curve is in good agreement with the simulation curve, and the simulation results of pressure amplitude at different positions are basically consistent with the experiment results, which verifies the reliability of the numerical simulation method.
FPGA-based low-cost synchronized fiber network for experimental setups in space
Authors: Oberschulte T. , Wendrich T. , Blume H. 
Published: November 2021

Abstract
Custom experiment setups in physics often require control electronics to execute actions and measurements on a small time scale.
When further constraints limit the experiment's environment, for example when the experiment is inside a sounding rocket, conventional network systems will not suffice those constraints because of weight, heat or budget limitations.
This paper proposes a network architecture with a time resolution of less than 1 ns over a pair of plastic fibers while using low-cost commercial hardware.
The plastic fibers in comparison to copper fibers have a low weight and additionally can isolate parts of the setup galvanically.
Data rates of 40 Mbit s-1 enable the network to transfer large amounts of measurements and configuration data over the network.
Proof-of-concept implementations of network endpoints and switches on small FPGAs are analyzed in terms of synchronicity, data rate and resource usage. Using commercial parts the resolution of 1 ns is reached with a standard deviation of less than 100 ps. Compared to a copper wire implementation the weight is reduced by about one order of magnitude.
With its low weight at a low cost, the network is useful in space or laboratory setups which require high time resolution.
Performance evaluation of lead-monoxide dosimeter with parylene coating for quality assurance of brachytherapy devices
Authors: Yang S.W. , Han M.J. , Jung J.H. , Mun C.W , Cho H.L. , Park S.K. 
Published: November 2021

Abstract
The source position of irradiation is identified using a
method that uses rulers and films for quality assurance (QA) in
brachytherapy. However, this method involves a high probability of
errors, because the scales are checked using the naked eye, and QA
is indirectly performed using photographs. Lead monoxide (PbO) is
widely used as a semiconductor dosimeter, because it is a
photoconductor that generates electrons in response to
electromagnetic waves. Moreover, PbO has excellent sensitivity to
reflected rays, owing to its high atomic number (Z
Pb:
82, Z
O: 8) and density (ρPbO:
9.53 g/cm3). We applied PbO to a dosimeter for QA in a
brachytherapy device and attempted to increase the signal stability
with a parylene coating for performance improvement. Subsequently, a
comparative analysis was performed with a PbO dosimeter that was not
coated with parylene to determine whether the fabricated dosimeter
is applicable as a dosimeter for QA of the brachytherapy device, by
analyzing the reproducibility, linearity, percentage interval
distance (PID), and angular dependence in the 192Ir source used
for brachytherapy. The RSD of the non-parylene PbO dosimeter was
0.85%, and the RSD of the parylene PbO dosimeter was 0.40% in the
reproducibility results. In the linearity evaluation results, the
R
2 value of the non-parylene PbO dosimeter was 0.9996, and that
of the parylene PbO dosimeter was 0.9997 In the PID evaluation
results, the difference in the intensity distribution measured
according to the distance due to the dose was attenuated at the
coated parylene in the case of the parylene PbO
dosimeter. Therefore, adjustments using correction coefficients are
required for suitable performance. In the angular dependence
evaluation results, the parylene PbO dosimeter had 3.44% less
angular dependence than the non-parylene dosimeter at an angle of
45°. The parylene-coated PbO dosimeter showed better
performance than the non-parylene-coated PbO dosimeter in terms of
the reproducibility, linearity, and angular dependence. Therefore,
it is considered that the parylene-coated PbO dosimeter can be
implemented for QA of brachytherapy devices.
Detection of GHR|AluI gene polymorphism and its association with body weight of Madura cattle in Indonesian Beef Cattle Research Station
Authors: Hartati  , Krisna N H , Firdaus F , Rahmadani S P , Soewandi B D P 
Published: November 2021

Abstract
Madura cattle is a one of the native cattle that are genetically tolerant of tropical climates. Madura cattle are one of the beef cattle breeds in Indonesia. Madura cattle can be a superior breed, but improving growth trait in Madura cattle needs to be conducted. The early step that was needed was for detecting the genes which were involved in growth traits. The purpose of this research was for detecting GHR gene polymorphisms and its association with body weight of Madura cattle population in Indonesian Beef Cattle Research Station. This study used 110 DNA samples of Madura cattle that was collected from the experimental barn at Indonesian Beef Cattle Research Station. DNA samples were extracted by DNA extraction kit. Genotype of GHR gene was detected by PCR-RFLP method using AluI restriction enzymes. In this study, association genotype and body weight was analysed by univariate GLM method. The birth weight, weaning weight, yearling weight and 18 months weight of Madura cattle were 16.8±0.3 kg; 82.4±2.3 kg; 124.6±3.7 kg and 166.7±5.0 kg, respectively. The GHR genes of Madura cattle had 3 genotypes AA, AG and GG and genotype frequencies of GHR gene were 0.273 (AA), 0.373 (AG), 0.355 (GG), respectively. Whereas the allele frequencies of A was 0.459 and the allele frequencies of G was 0.541. Based on Chi-square (X2) analysis showed that the population sample was not disequilibrium. The result of association analysis was significant (P <0.05) on weaning weight, yearling weight and 18 month weight. It was concluded that the GHR gene has potential as a genetic marker for growth traits and can be used as MAS in Madura cattle in Indonesian Beef Cattle Research Station.
Evaluation of the productivity of the Belgian Blue x POGASI crossbred cattle raised at the Beef Cattle Research Station
Authors: Primananda M , Aryogi  , Prihandini P W 
Published: November 2021

Abstract
This study aimed to evaluate the productivity of the Belgian Blue x POGASI crossbred cattle raised at the Beef Cattle Research Station located at Grati, Pasuruan. Therefore, data on productivity, such as body measurements, birth, weaning, and yearling weight, as well as reproductive performances, were collected and analyzed using t-tests from 11 calves of Belgian Blue x POGASI (F1) crossbred cattle consisting of 5 males and 6 females, and also 11 calves of POGASI cattle consisting of 3 males and 8 females. From the results, there were significant differences (P<0.05) in body measurements between Belgian Blue x POGASI crosses and the POGASI cattle. Specifically, the Belgian Blue x POGASI crossbred calves had birth, weaning, and a yearling weight of 34.45±6.55 kg, 218.08±37.99 kg and 368.05±41.77 kg, respectively, as well as age at first estrus and libido of 12.99±3.13 months and 16.53±1.45 months, respectively. Also, the crossbred calves had body weight at first estrus and libido of 413.25±38.46 kg and 489.75±42.60 kg, respectively. In conclusion, the productivity of Belgian Blue x POGASI crossbred calves was higher than that of POGASI calves. Therefore, it was concluded that BB x POGASI calves produced greater performances than POGASI calves.
Comparative study of herbal and non-herbal egg protein profile using High Performance Liquid Chromatography (HPLC)
Authors: Ardiarini N , Lase J A 
Published: November 2021

Abstract
The purpose of this research is to compare the protein profile of herbals egg and non herbal egg using High Performance Liquid Chromatography (HPLC). This research used HPLC Shimadzu 6.1 with column C18, flow rate mobile phase 1 ml/min, wavelenght detector UV Vis 220 nm and temperature 50o C. Mobile fase that used in this research was 10 and 60 % acetonitril (CH3CN) in water containing 0,05% triflouroacetic acid. Supplementation of herb containing bioactive antioxidant compounds affect the formation of egg yolk protein containing immunoglobulin. In this study, herbal eggs and non-herbal eggs were seen from their protein profile using the high performance liquid chromatography (HPLC) method and then analyzed using descriptive qualitative analysis. The result show that herbal egg yolk sample has a dominant protein with a molecular weight of 50.41 kDa. Herbal egg yolk protein appears at a retention time (RT) of 56.87 minutes, an area of 3303488 units of area, and the peak height of the graph / peak at 50,974 µAU. Meanwhile, non-herbal egg yolk sample has a dominant protein with a molecular weight of 49.94 kDa. This protein appears at a retention time of 1.307 minutes, an area of 149445550 units of area, and the peak height of the graph / peak at 402.6026 µAU. The results showed that the the peak of HPLC indicated an antioxidants were bound to the bioactive protein fractions of egg yolk. It could be concluded that bioactive herbal bound to egg yolk igY, but the bioactive compounds have not been identified yet.
Polymorphism of Insulin-induced gene 1 (INSIG1) of three local beef cattle in Indonesia
Authors: Volkandari S D , Margawati E T , Wulandari A S , Indriawati  
Published: November 2021

Abstract
Insulin-induced gene 1 (INSIG1) encoded protein that blocked of proteolysis activity from protein sterol regulatory element binding proteins (SREBP). The role gene plays of cholesterol, fatty acid, and glucose metabolism. Indonesia has many several beef cattle which has good quality of growth trait. The aim of this study was to identify polymorphism of INSIG1 gene (SNP 4366 (A>G) and 4534 (T>C)) of three local beef cattle in Indonesia (Bali, Pasundan and Ongole Decendent). One hundred and twenty seven samples were used in this study consisting of Bali cattle (46) from Pulukan Bali Island, Pasundan (36) from UPTD BPPT Beef cattle Ciamis West Java and Ongole Grade (OD) (45). DNA was extracted from whole blood using High Salt method then genotyping used PCR-RFLP method with RsaI and TaqI enzymes. Parameters in this study were genotype and allele frequencies, heterozigosity observed (Ho), expected (He), Hardy-Weinberg Equilibrium (HWE) and Polymorphism Information Content (PIC). Result showed that a 428 bp of DNA fragment was successfully amplified and digested. Three variant of genotypes with two alleles were identified. For SNP 4366 (A>G) were AA, AG and GG with dominant of G allele while SNP 4534 (T>C) were CC, CT and TT with dominant C allele. Both of SNPs in each of breed populations was in Hardy-Weinberg Equilibrium and polymorphic. Additionally, PIC value reached moderate. In conclusion, polymorphism was found in beef cattle and it could be early study for genetic diversity
Assessment on pastoral system within oil palm - cattle integrated system to support beef self-sufficiency in North Sumatra
Authors: Sitindaon S H , Hasyim A R , Khairiah  , Ramija K E 
Published: November 2021

Abstract
The research was conducted to see the forage production, carry capacity and rotation cycle that was most suitable for grazing cattle in the ecosystem of oil palm plantations. The research was conducted at Tanah Itam Ulu Oil Palm Plantation, Tanah Itam Ulu Village, Lima Puluh District, North Sumatra from January-December 2017. The research used RCBD consisting of 3 x 3 with 3 replications. The first factor is the age of oil palm trees (6, 12 18 years), the second factor is the rotation cycle of forage (40, 50, 60 days). The parameters observed: forage production, cattle capacity, forage nutritional and botanical composition. The research results showed that forage production and carrying capacity had a significantly higher effect (P <0.05) with a harvest interval of 40 days at the location of juvenile oil palm, which was 11,962 kg dry matter /ha/year and carrying capacity was 1.31 AU/ha. Forage quality (protein, NDF and ADF) had no significant effect (P> 0.05). The dominant forage species appeared in almost all observation plots, namely Cyrtococcum and Axonopus. The results of the study concluded that oil palms of 12 years with a harvest rotation of 40 days provided the largest capacity for grazing beef cattle.
Aspects of animal welfare on Rusa Timor (Cervus timorensis) in Bumi Marina Captive Breeding Facility in Manokwari
Authors: Amareyao W , Warsono I U , Pattiselanno F 
Published: November 2021

Abstract
A conservation program of timor deer (Cervus timorensis) is carried out through its breeding approaches in captivity. This study aims to examine the welfare aspects of timor deer (Cervus timorensis) in Bumi Marina captivity based on the principles of animal welfare. This research uses a descriptive method and observation techniques in the captivity. Variables observed in this study are (1) free from hunger and thirst, and (2) free from pain, injury and diseases. The result indicates that the implementation of two welfare aspects of timor deer (Cervus timorensis) kept in the captivity has a 86 point based on the criteria used in this study, and categorised as very good, or grade A. This means that these two welfare components of the timor deer (Cervus timorensis) have fully met the criteria determined by the regulation of Directorate General of Forest Protection and Nature Conservation No. P.9 / IV-SET / 2011 regarding ethical guidelines and animal welfare in the captivity.
Tempoyak from Agam district of West Sumatera, Indonesia as a local probiotic super food candidate
Authors: Hendry N , Aldi Y , Syukur S , Juliyarsi I , Purwati E 
Published: November 2021

Abstract
Tempoyak is a traditional food made from durian which has the potential to be a probiotic superfood. Tempoyak is made by fermenting durian fresh in anaerobic conditions. Tempoyak naturally contains probiotic microorganisms called Lactic Acid Bacteria (LAB). LAB is one of the most significant organisms and has benefits for help the healing process of various diseases such as diarrhea, constipation, irritable bowel syndrome, and infections. This study aims to determine the total colonies of LAB and chemical properties, namely protein value, fat content, water content, pH, and TTA (Total Titrable Acid) from tempoyak from Agam district. The method used is descriptive method and laboratory analysis. The sample used in this study was durian fresh (Durio zibethinus L.) with three treatments. The first treatment uses durian meat only (TK1), the second treatment uses durian meat with chili (TK2), the third treatment uses durian meat with salt (TK3). The results showed the total colonies of LAB 39x107 - 98x107, the highest was in tempoyak TK3. Protein content 2.84% - 3.90%, the highest was in tempoyak TK1. Fat content 3.37% - 3.74% and the highest was in tempoyak TK1. Water content 75.53% -85.38% and the highest was in tempoyak TK3. pH 4.1-4.3, the highest was in tempoyak TK1. Total Titrable Acid 0.28% - 0.36% and the highest was in tempoyak TK1.
Chemical composition and in vitro gas production of cassava peel silage using different preservatives
Authors: Kartika A D , Kusmartono  , Mashudi  , Ndaru PH 
Published: November 2021

Abstract
This study aimed to evaluate the effects of using different types and levels of preservatives on chemical composition and in vitro gas production (IVGP) of cassava peel silage. The following treatments were applied: T0: cassava peel without preservative; T1: T0 + molasses 2%; T2: T0 + molasses 4%; T3: T0 + rice bran 2%; T4: T0 + rice bran 4%; T5: T0 + cassava meal 2% and T6:T0 + cassava meal 4% with 3 replications arranged in a completely randomized design (CRD) for the chemical composition variable and randomized block design (RBD) for IVGP variable. The results showed that treatments significantly affected (P<0.01) DM, OM, and EE contents, significantly affected (P<0,05) IVGP but did not significantly affect CP, CF contents, potential, and rate of gas production (P>0.05). Treatment T5 seems to have higher values of IVGP and ME (159.1±7.19 ml/500 mgDM; 11.1±0.36MJ/kg DM, respectively) compared to the other treatments that might have related to a higher OM available for in vitro fermentation process. It can be concluded that the use of cassava meal at 2% level can be considered as the most ideal preservative to use to produce a high-quality cassava peel silage.
Comparison of mineral content of cuscus manure fertilizer and its trial results on the growth of Setaria sphacelata
Authors: Sawen D , Mauri F R S , Tirajoh S , Nuhuyanan L , Junaidi M 
Published: November 2021

Abstract
This study aims to determine the mineral content of cuscus’ manure and its utilization on the growth of Setaria spachelata grass. The study was designed with a completely randomized design (CRD) with 3 treatments (control / P0; cuscus manure from banana fruit feed / P1; and cuscus manure from avocado / P2) and 5 replications. The dose of organic fecal fertilizer for cuscus, 40 grams / polybag. The setaria seedlings used were adult poles measuring 20 cm, which were planted in polybags measuring 30 x 15 cm and weighing 5 kg of soil. The results showed that there were differences content in manure mineral among the types of fruit eaten as feed. Furthermore, its use on setaria grass was able to increase its growth, namely plant height, number of leaves and number of tillers, the control treatment was significantly different from treatment P1 and P2 (P <0.05), but between P1 and P2 did not show any differences. Plant height ranges from 35.10-39.10 cm, the number of leaves is 71-101, while the number of tillers is 13-21 tillers per polybag. The cuscus manure has the potential as organic fertilizer.