bluuebunny/crossref_metadata_2025_split huggingface dataset:
Single-photon Counting System Based on a 4H-SiC Avalanche Photodiode
Authors: Liu Fei , Zhang Leng , Li Fangzheng 
Published: November 2020

Abstract
Weak ultraviolet (UV) signal detection systems have broad application prospects in fields such as space science, aerospace, and military communications. 4H-SiC avalanche photodiode (APD) devices have a high internal gain and can be used in single-photon-based UV radiation counting systems when in Geiger-mode operation. The system comprises an APD drive circuit, a passive quenching circuit, a signal conditioning circuit, a counting and control circuit based on a microprogrammed control unit, and a display module, which can perform real-time monitoring of changes in weak UV radiation.
Research on Microstructure and Performance of Welded Joint of High Strength Match
Authors: Wang Yan 
Published: November 2020

Abstract
This paper studied the microstructure, hardness and impact property of the high match welded joint of Q235A steel. The experiment results showed the grain of the same feature region gradually tended to be coarsening under the approximately same welding speed when the welding current increased. Under the same welding current, the weld zone hardness was the highest, the normalized zone hardness was medium and the overheated zone hardness was lowest but the hardness of each zone was still higher than the hardness of the base metal. The sample impact toughness under 120A welding current was the highest. Under the experimental conditions, the best welding current for high matching welded joints was 120A. The comprehensive mechanical properties of low carbon steel welded joint were the best when the welding current was 120A.
Study on Surface Structure of Filter Material of Cabin Air Filter Impacted by Droplets
Authors: Wei Yin , Tianqiang Du , Chao Chen , Yongao He , Shuhong Wei 
Published: November 2020

Abstract
As the filter material of cabin air filter is closely related to the filtration effect, this paper establishes a physical model of the droplet impact on different surface structures of filter material and numerically simulates dynamic characteristics of the droplet impact on different surface structures. The results show that the ability of filter material to capture droplets is directly proportional to the hydrophilic strength of filter material and the surface roughness (⩽ droplet diameter).
Numerical investigation on the sealing performance of pipeline inspection gauge (PIG) Crossing Elbows
Authors: Jiang Jinxu , Kang Yang , Jiao Chunxiao , Shi Haoyu , Wang Kai , Zhang Hong , Liu Xiaoben 
Published: November 2020

Abstract
The pipeline inspection gauge (PIG) is one of the most popular pigging equipment. In recent years, blocking and stagnation accidents during PIG’s operation process seriously affect the safe operation of energy pipelines. In order to investigate the sealing performance of the PIG’s rubber cup, a four cup drain PIG’s movement in elbow was considered as a prototype in this study. Based on a validated finite element model, the contact stress between sealing cups and the pipe wall and pressure relief area of cup are obtained. The results indicate that when the PIG is operated in a small curvature elbow, the sealing performance of the cup is obviously weakened. Increasing the sealing cup interference and the differential pressure of the sealing cup surface can enhance the sealing performance of the PIG cup. When the PIG’s sealing cup is detached from the inner wall of the pipe, reducing the elastic modulus of the pig’s cup material can be a reasonable measure to enhance the sealing performance of PIG cups.
Direct shear test on the interface between concrete and bedrock of dam foundation of a reservoir
Authors: Wang Yong , Li Haifeng , Wang Wenxuan , Zhang Jianwei 
Published: November 2020

Abstract
The weak failure surface of the dam body and the bedrock cementation surface is one of the key points of dam safety research at home and abroad. The direct shear strength of the contact surface between the dam foundation concrete and the bedrock is used as the current research on whether the dam will “slip” along the contact surface. Based on this, many different methods are used at home and abroad to determine the direct shear strength. In this paper, through the excavation of the dam foundation rock and on-site rock structure samples, 5 sets of 25-point in-situ direct shear tests on the interface between concrete and bedrock were carried out on the medium-thick-thick feldspar quartz sandstone of the main rock mass of the dam foundation to determine the dam foundation. Mechanical parameters of rock mass. Based on the results of field experiments, some reference opinions for field direct shear tests and direct shear strength selection in engineering design are put forward, which also provide a basis for subsequent numerical simulation calculations.
Artificial Seawall By Blasting Squeezing Silt And amelioration treatments in Saline-alkali Soil With Toilet Revolution without sewers
Authors: Xu Cheng , Rui-ze Han , Li-ying Zhang , Jerry Tien , Wen-ping Cai , Ganqin Wang , Xiaoling Wu , Liqun Wang 
Published: November 2020

Abstract
Artificial seawall by silt squeezing with blasting dike, a small price for a good seawall than with mechanical dredging, and is effective in preventing this kind of accident from tsunami and typhoon disaster. This paper briefly discusses the pollution situation of poultry and mankind waste in China. For the first time gives the techniques for harmless (China patent ZL 201220109642.1, no flush heathy toilet.) and utilization of waste in China are presented and analysed for benefit utilization. Sanitary toilet without sewers -2019 world break-through technologies (no flush heathy toilet) driven reinvent the toilet challenge, RTTC. Authors also show the technique for harass and utilization of wastes in China. The authors suggest that all the mankind and animal waste, after harmless processing, should be used in a way of useful things as feed, fertilizer, etc. to benefit human society, prevent disease (covid-19, sars) propagation and reduce greenhouse gases. It is also can be used on ship, aircraft, coach and out space etc. (China patent ZL 201220109642.1 is one of several ways of human and livestock faeces harmless treatment, ultraviolet disinfection, ozone fumigation), its weight less than 15kg, volume less than 0.12m3.
Three-dimensional Simulation and Analysis of Spray Structure inVertical MOCVD Reaction Chamber
Authors: Changjiang Liu , Zhiming Li , Runqiu Guo , Lansheng Feng , Tao YangShun 
Published: November 2020

Abstract
In the vertical spray MOCVD reactor, a spray structure composed of fan bodies was proposed. CFD was used to simulate the gas deposition process in GaN-MOCVD reactor. The characteristics of changing the concentration of reaction gas above the substrate surface with the height of the fan, the distance between the spray nozzle and the substrate surface, and the substrate rotation speed were given. Compared with the traditional spray structure, the cylindrical spray structure composed of fan body can effectively reduce the premixing problem of reaction gas sprayed from the spray nozzle before entering the reaction chamber and reaching the substrate surface. At the same time, the simulation structure shows that when other conditions are fixed, with the increase of the fan height, the increase of the distance between the spray nozzle and the substrate surface and the acceleration of the substrate rotation speed, the uniformity of GaN deposition on the substrate surface can be better under the same isolation effect, so that the utilization rate of TMG can be as high as possible under the condition that the uniformity is satisfied.
Study on Relationship between Material Vickers Hardness and Yield Stress of A508 Nuclear Material
Authors: Zhuang Zecheng , Lan Minhua , Yao Yinjing , Xu Shichao , Xu Jie 
Published: November 2020

Abstract
It is difficult to directly obtain the mechanical properties of local materials of actual engineering structure (such as welded joints) by traditional mechanical test. Indentation test and ABAQUS finite element test were used in this paper, the relativity between Vickers hardness and yield stress of nuclear material A508 were studied, and a new method of using material surface Vickers hardness to acquire material properties was established. It can be used in the welded lines of nuclear dissimilar metal welded joints to obtain material parameters of mechanical property uneven zone of welded joints, and this new method was supported for complex engineering structure material mechanical parameters.
First-principles calculation of the interface stability of 3C-SiC(111)/Mg(0001)
Authors: lv Zhao , Yao Junping 
Published: November 2020

Abstract
The first-principles plane wave pseudopotential method based on density functional theory was used to study four SiC(111)/Mg(0001) interface models, and the ideal work of adhesion, charge density distribution, charge density difference and Mulliken population of the four interface models were calculated. The calculation results show that the structure of four interface models has not changed significantly, except for the more or less decrease in the interface spacing after geometry optimization. The Center-site interface of the C-terminated has the largest work of adhesion and the smallest interface spacing, which is the most stable structure among the four models. The calculation of the electronic structure shows that interfacial bonding of these two terminated interfaces of Center-site is a mixture of covalent and ionic bonds.
3D face modeling and rapid casting based on reverse design
Authors: Liu Huihui , Ye Shengping , kong Ming , Zhu Yueting , Jin Ya , Yang Weihong 
Published: November 2020

Abstract
This paper first obtains human body data based on a 3D scanner, combines with Geomagic Studio to obtain a 3D model; and explores three 3D printing technologies for rapid prototyping of the model. The 3D prototype is turned out of the wax mold using the silicone rubber reworking process, and finally the melting is used. Mold casting process to complete portrait casting. Practice has proved that this method realizes the entire workflow of 3D face data acquisition, rapid prototyping, and rapid casting, and has high application value and market prospects in the production of 3D portrait artwork.
Effect of Magnetized Water on Working Performance of Cement Mortar
Authors: Zhang Zhifeng , Li Borong , Song Nan , Yao Pengcheng 
Published: November 2020

Abstract
Compared with common drinking water, magnetized water seems to have the potential to save water for concrete production. The main purpose of this paper is to combine theoretical analysis and experimental verification of multiple sets of comparative tests to study the effect of magnetized water on the performance of cement mortar. This paper starts with the structure of water and the mechanism of hydrogen bond formation, clarifies the activation mechanism of magnetized water, and combines the properties of magnetic field to activate water to explain the mechanism of magnetized water enhances the performance of cement mortar. Through a cross-contrast test that combines four magnetic field strengths and three mortar strength grades, it is found that when cement mortar is mixed with magnetized water, the compressive strength increases by about 20% compared with ordinary water mixing, and the maximum increase can be as high as 25.3 %. Also, the additional strength obtained through the use of magnetized water meets the need to reduce the amount of cement in mortar, and at least 10% of cement can be saved when the design strength of the reference mix proportion is met.
A concept to evaluate procurement principles implementation of public construction project in Surabaya
Authors: Sandi P V , Rohman M A , Utomo C 
Published: November 2020

AbstractPublic construction procurement is a Government program to meet infrastructure needs. As a government program that uses the public budget as a source of funding, public procurement tends to be vulnerable to various problems and criticisms, especially related to public trust as users. Therefore, the government must prove that the implementation of procurement including the procurement of construction can be relied upon, so it must be carried out professionally and ethically. To guarantee that, construction procurement must adhere to the principles set out in the regulation. Presidential Regulation of the Republic of Indonesia Number 16/2018 regulates Public Procurement of Goods and/or Services and establishes 7 principles of procurement implementation, including: efficient, effective, transparent, open, competitive, fair, and accountable. This paper is an initial stage of research to evaluate the implementation of the principles of construction public procurement. The purpose of this study is to identify the indicators that must be met by the government in the implementation of these principles. These principles will become the research variables, while the indicators are obtained from related literature studies. The data in this study were obtained by distributing questionnaires and interviews with several parties concerned with the public procurement in Surabaya. According to the experts’ opinion, there are found that 48 indicators of the principles which could be used to evaluate the principles of the implementation of public construction project procurement in Surabaya.
A Literature Review of Methods in Research on Green Building Cost Analysis
Authors: Yasinta R B , Utomo C , Rahmawati Y 
Published: November 2020

Abstract
Development greatly influences environmental sustainability and quality. The concept of green building is one solution to minimize environmental damage due to construction. The concept of green building requires greater investment than conventional building. Life Cycle Cost (LCC) impacts the cost of planning, building’s operational and maintenance cost and residual cost. Recently, research of green building on cost analysis is developing rapidly. There are so many studies of green building on cost analysis with different methods. This research addressed several relevant methods and is expected to set clear which methods to use for the future research under green building topics. This journal is meant to find out research method used in determining green building on cost analysis. The method to be carried out is a literature review of 14 relevant reputable journals from 2013-2020. The most widely used method is the Life Cycle Cost Analysis (LCCA).
Weighting variables for building performance evaluation
Authors: Simbolon L N S , Wiguna I P A , Adi T J W 
Published: November 2020

Abstract
Building performance appraisal needs to be done as a form of evaluation, so that the level of usability of a building can be seen at the operation and maintenance stages. The purpose of this study is to give weight to the variables used in evaluating the performance of a building. In this study, the identification of building performance variables is based on literature studies and semi-structured interviews from the experts of the field. The determined variables are then filtered using the Relative Important Index (RII) method, and weighted using the Pairwise Comparison method. All this process is conducted based on the opinion of experts who are competent in the field of building, and all stages are conducted by questionnaire. The results of the filtering and weighting of variables produce 5 (five) variables and 24 (twenty four) sub-variables used in building performance evaluation, with the results of weighting for safety variable with a weight of 59.2%, health variable with a weight of 24.6%, comfort variable with a weight of 10.2%, ease variable with a weight of 4.3%, and utility variable with a weight of 1.8%.
Inspection and evaluation of bridge structures for earthquakes risk
Authors: Setiati R 
Published: November 2020

Abstract
The 2017 Earthquake Source and Hazard Map Update in 2017 showed a significant change to the previous earthquake map. An increase in the number of active faults and high magnitude earthquake events indicates an increased potential for earthquake risk. The availability of qualified seismic manual is a must to support the direction of government policy in the provision of infrastructure, especially roads and bridges in a sustainable manner. This study aims to determine the value of the vulnerability of existing bridges against earthquakes and alternative reinforcement that can be done. The reinforcement philosophy is based on performance, similar to the philosophy used in the design of new bridges. Performance criteria are examined using earthquakes with a probability of exceeding 7% in 75 years. Performance criteria are determined based on the level of importance and remaining life of the bridge service. An example of a case study was made by examining and evaluating a prestressed girder bridge located in the earthquake zone 4 of the Jakarta area. Analysis and evaluation of bridge capacity is made using the SAP 2000 program. The 3 (three) dimension model is used to calculate the effect of 3 (three) structural dimensions on the dynamic behavior of the bridge. Earthquake input is made in the form of spectra response according to SNI 2833-2016. For earthquake loading in the X and Y direction the g/R scale factor is used (9.81/5), which is 1.96. The basic shear capacity of the column is calculated according to SNI 2833-2016 which consists of the shear capacity of the contribution of the concrete section and reinforcement. Based on the analysis, it was obtained that the column sliding capacity was 1333.3 kN. The value of the capacity is greater than the ultimate shear load of 519.07 kN so it can be concluded that the sliding capacity of the column still meets the earthquake load so that no structural reinforcement is needed.
Vs and CPT based evaluation of location with high liquefaction damage during 2018 Palu earthquake
Authors: Rahmawati H A , Prakoso W A , Rahayu A 
Published: November 2020

Abstract
Palu earthquake occurred on 28 September 2018 caused severe liquefaction damages for the city. Based on field surface damage survey by Indonesia Geology Agency, a location was classified within the high liquefaction damage area. The pre-event soil characteristics of this location was provided by resutls of MASW (Multichannel Analysis of Surface Wave) and CPT (Cone Penetration Test) surveys. The soil deposit could characteristized by relatively low shear wave velocity (Vs) and low of cone resistance (qc) values. The potential liquefaction presented by safety factor (0.6 to 0.9) obtained based on both methods was consistent to depths from 2.0 m to 5.0 m. This safety factor appears to be consistent with the high liquefaction damage reported by the Agency.
Comparison of ultimate bearing capacity based on empirical method, interpretation of loading pile test and finite element
Authors: Lastiasih Y , Sari P T K 
Published: November 2020

Abstract
Civil Engineers in designing the ultimate brearing capacity of the pile usually uses several empirical methods. Then usually the loading pile test will be conducted to confirm the ultimate carrying capcity in the field. Based on conditions that often occurs in the field, an empirical method of research is carried out to find out which method is closest to results of the field test. So that in designing the ultimate bearing capacity of the deep foundation will be closer to the field conditions. The empirical methods used in this case are the method of Bazara and Luciano Decourt, while the interpretation pf filed results uses the methods of Chin, Mazurkiewiz and Lastiasih. Based on the results of empirical methods and interpretation of the ultimate bearing capacity of the field test, the results of the pile loading test will be analysed using finite element. The result of this research shows Finite Elemet method, Luciono Decourt and Lastiasih are the closest produce produce ultimate bearing capacity with loading pile test until failure.
The stabilization of soft soil using admixture of palm oil boiler ash and MATOS
Authors: Ma’ruf M. A. , Rusliansyah  , Ritonga F. I. D. , Azizah B. 
Published: November 2020

Abstract
Banjarmasin has an alluvial area with soft soil thickness of 28-42.4m. Therefore, the land is not structurally feasible for construction due to the low California Bearing Ratio (CBR). One of the solutions used to overcome this problem is soil stabilization. This study aims to examine the effect of adding palm oil boiler ash and MATOS in accordance with CBR value to stabilize soil conditions. The laboratory CBR method was used to determine the original and stabilized conditions of the soil. The initial and stabilized soils used an admixture of 2% MATOS as an additive and palm oil boiler ash with percentage variations of 6%, 9%, and 12% of the dry weight soil. This was further kept for 7 days curing before being tested. The result showed that the highest CBR value is obtained at the variation of 6% palm oil boiler ash + 2% MATOS with an increase in CBR value of 7.542% from the original soil condition.
Analytical modeling of 3D-printed reinforced concrete beams
Authors: Chandra J , Pudjisuryadi P , Antoni A , Wibowo H 
Published: November 2020

Abstract
Three-dimensional (3D) printing for cementitious materials such as concrete has become increasingly popular. Numerous research efforts have been undertaken to fabricate structural elements, such as beams, using 3D-printed concrete. Because the behavior of 3D-printed reinforced concrete (RC) beams is not well understood, research in this area is still ongoing to investigate the behavior and compare it with conventional RC beams. In this paper, the results of an analytical study using finite element software on 3D-printed RC beams are presented. The main challenge was to determine a constitutive material model of the 3D-printed concrete for nonlinear analysis that was quite different from normal concrete. The developed model was validated using the results from several past experimental tests on 3D-printed RC beams. The results showed that the analytical model can accurately predict the maximum flexural strengths of the 3D-printed RC beams. However, the analytical model overestimated the initial stiffness of the beams. Furthermore, several local failures, such as shear failure of nodal points and bond failure between rebars and concrete, could not be well simulated by the analytical model. Thus, future research is needed to correctly define the constitutive material model for 3D-printed RC beams.
Effect of reinforced concrete beam confinement under cyclic loading on ultimate drift ratio
Authors: Wibowo L S B , Cahyono M S D 
Published: November 2020

Abstract
The purpose of this paper is to evaluate the effect confinement on ultimate drift ratio of reinforced concrete beam specimens using normal concrete. All beam specimens were tested under cyclic loading. The measured compressive strength of the concrete is in the range of 25 – 41.8 MPa, longitudinal reinforcement yield strength is in the range 350 – 570 MPa and transverse reinforcement yield strength is in the range 275 –570 MPa. Test parameters include s/db
ratio, ρt
, and Vs,a/Mn
ratio. The results showed that Vs,a/Mn
ratio have a significant effect on the ultimate drift ratio. Increase the nominal shear strength by confinement leads to an increase of ultimate drift ratio. In other hands, spacing of transverse reinforcement not exceeding 8db
can achieve minimum 3.00% ultimate drift ratio.