bluuebunny/crossref_metadata_2025_split huggingface dataset:
Predictors of Arteriovenous Fistula Early Failure in End-Stage Renal Disease Patients: Real-World Data in Surabaya
Authors: Amadis M R , Putranto J N E , Maghfirah I , Mardiana N 
Published: February 2020

Abstract
Arteriovenous fistula (AVF) is the vascular access of choice in prevalent hemodialysis end-stage renal disease (ESRD) patients. However, there was a significant proportion of early AVF failure and its predictive factor was conflicting in several studies. We conducted a retrospective cohort study in 225 AVFs created in 159 patients. The purpose of this study was to identify the predictive factors of AVF early failure. The data variables included age at AVF creation, sex, history of diabetes, hypertension, cigarette smoking, AVF location and side, history of subclavian tunneled dialysis catheter and history of preoperative ultrasound mapping. This information was collected by interviewing the patient and by AVF scar inspection. AVF that was never coming into use was classified as an early failure. AVF creation in the wrist was significantly associated with a higher early failure rate (29.9%) compared with AVF creation at the elbow (4.4%) (p < 0.001). There was no significant association in terms of AVF early failure in terms of the other variables. We concluded that wrist AVF is significantly associated with early failure. However, this finding should not preclude the National Kidney Foundation’s recommendation of using wrist AVF for the first choice of vascular access to conserve more proximal access sites for future use.
The potential of application of Ni-layer for enhancement of utility properties of freight wagons
Authors: Andrsova Z , Kejzlar P , Bakalova T , Petru M , Podzimek P 
Published: February 2020

Abstract
The construction of 4-axled freight wagons used for transportation of bulk materials is limited with respect of minimal angle allowing emptying the bulk cargo and limited lifetime caused by abrasion caused by intensive wear between the wagon wall and transported cargo. A potential of application of protective chemically-deposited Ni-layer was evaluated based on tribological testing.
Intermetallics formation during hot dip galvanizing of high carbon steel
Authors: Gogola Peter , Gabalcová Zuzana , Suchánek Henrich , Kusý Martin 
Published: February 2020

Abstract
From the moment of immersion, the reaction between molten zinc and solid steel starts forming intermetallic phases. This diffusion-controlled process is largely responsible for the final phase composition of zinc coatings. Several literature sources describe this phenomenon for interstitial free steels, but high-carbon steels are rarely being used as substrates. Therefore, in this work high-carbon steel substrates were used. Multiple samples were created by hot-dipping at various immersion temperatures ranging from 450 to 490 °C and times from 24 to 60 s to investigate mainly the morphology of the obtained intermetallic phase layers. Investigation was carried out mainly by SEM on 20 condition, where several hundred sites were investigated in total to achieve statistically relevant information. It was found that while increasing the immersion time influences mainly the thickness of individual intermetallic phase layers, the temperature influenced mainly their morphology. It was also observed that these results are significantly different compared to ones found in literature for interstitial free steels.
Influence of higher partitioning temperatures on mechanical properties of heat treated high-strength steel alloyed with 1.3 % chromium
Authors: Janda Tomáš , Burdová Karolína , Peković Michal , Stehlík Adam 
Published: February 2020

Abstract
This paper deals with the innovative Quenching and partitioning (QP) heat treatment of low-alloyed chromium steel, and is especially focused on the higher temperatures of partitioning as well as longer holding times and its influence on mechanical properties of the material. As part of the experiment various heat treatment, metallographic analysis, hardness measurement, X-ray diffraction phase analysis (to determine retained austenite content), tensile test and Charpy impact test were performed. In QP treated specimens the best combination of tensile strength and elongation was observed after quenching in 200 °C salt bath and partitioning at 250 °C for 30 minutes. This specimen showed the tensile strength above 1900 MPa, elongation of 14 % and also good impact toughness (34 J). Equally good values of impact toughness (36 J) were also observed in the specimens partitioned at 300 °C or 320 °C for holding times up to 30 minutes. On the other side longer partitioning times at the temperature of 320 °C affected the elongation and impact toughness negatively.
Combination of press-hardening and isothermal holding in the treatment of high-strength steels
Authors: Jirková Hana , Opatová Kateřina , Jeníček Štěpán , Kučerová Ludmila 
Published: February 2020

Abstract
Today, high-strength parts for the automotive industry are mainly produced by the press-hardening technology. In order to reduce costs, savings in production and optimal materials are sought. One option involves the use of high strength steels of various chemical compositions. Two high strength steels were studied in the present experiment. The first one was CMnSi steel, a typical low-alloy TRIP steel with a carbon content of 0.2 %; alloyed with manganese and silicon. The second one was 42SiCr steel, a member of the group of martensitic steels, with a carbon content of 0.42 %. In addition to manganese and silicon, this steel is also alloyed with chromium. The CMnSi steel has not proved to be very sensitive to changes in process parameters, achieving an ultimate tensile strength of more than 950 MPa and an elongation of over 10%. 42SiCr steel was found to respond to both heating temperature and deformation, showing different mechanical properties. With the right combination of process parameters, an ultimate tensile strength of over 2100 MPa was achieved.
Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel
Authors: Kučerová L , Burdová K , Stehlík A 
Published: February 2020

Abstract
Two-step heat treatment with bainitic hold at 425 °C was applied to low alloyed high strength steel with partial substitution of silicon by aluminium. The steel was further micro-alloyed by niobium. Various soaking temperatures in the range of 750-1250 °C were used to analyse the effect of soaking on mechanical properties and microstructure of the steel. According to calculations in JMatPro, the temperatures below 900 °C should lie in an intercritical (tow phase) region, while the temperature of 900 °C should be the first one to ensure full austenitization of this steel. To dissolve different portion of niobium into solid solution, higher soaking temperatures were also used. Tensile strengths of 780-1069 MPa and total elongation of 22-46 % were achieved.
Influence of temperature and speed of the laser head on the final structure surface hardened steel ČSN 12050 (EN 10083-2 steel 1.1191)
Authors: Peukert P. , Švec M. 
Published: February 2020

Abstract
Laser technologies are listed as unconventional methods of machining and heat treatment, which allows many advantages. In the area of heat treatment the laser technology allows a wide range of surface hardening. It provides a very fast and effective approach where the region of influence of the material is quite narrow. The method is also possible for hardening parts and materials which were not possible to process with the conventional processes. To get the required depth and quality of the hardened layer it is necessary to set up properly the laser process parameters (temperature in the process area, feed rate of the laser head, etc.), which varies for different materials. The paper presents a test for optimal process parameters for surface hardening of the material ČSN 12050 (EN 10083-2 steel 1.1191). The surface structure for temperatures of 900, 1100, 1200 and 1300°C and laser head feed rates of 0.18, 0.3 and 0.42 m/min were tested. Best results were obtained for a temperature of 1300°C and a feed rates of 0.18 m/min.
Rolling of ingots of third-generation high-strength steels into sheets
Authors: Vrtáček Jiří , Jirková Hana , Peković Michal , Tříska Ladislav 
Published: February 2020

Abstract
One of the essential branches of today’s engineering production involves the production of sheet stock by rolling. In the automotive industry is used the majority of steel sheet stock. In recent decades, this sector has been striving to reduce vehicle emissions. One of the available solutions involves the use of advanced high-strength steels whose chemical composition and strengthening mechanisms make it possible to build the car body with thinner sheet blanks than before. For rolling trials in which ingots were converted into 1.8 mm sheet by combined hot and cold rolling were used two advanced high-strength steels containing 0.2 wt. % carbon and additions of manganese, silicon and different levels of aluminium. This procedure was found to produce strengths in excess of 1000 MPa combined elongation of more than 15 %.
Energy Production from Mechanical Stress, Thermal and Wind Power
Authors: Maurya Rishabh , Kumar Maduri Praveen , Singh Kushagra , Soni Apurva 
Published: February 2020

Abstract
The two main factors for living, water and non-renewable energy are being over used these days which will ultimately lead to contamination and depletion of natural resources. Ground water is getting contaminated due to pollution while fossil fuels are being used in excess for generation of electricity. To overcome these issues author proposes a system which not only uses available natural resources to generate electricity but also helps in conserving rain water. A compact design is proposed which utilizes solar and wind energy along with rain water harvesting. System is designed in such a way that the energy produced does not depend on the ratio of availability of resources thus conserving the two main factors for living water and energy.
Ranking of Barriers to Green Manufacturing Implementation in SMEs Using Best-Worst Method
Authors: Kushwaha Dilip , Talib Faisal 
Published: February 2020

Abstract
Nature has provided us with limited resources on the earth, but the requirement is unlimited, one is fulfilled another will crop up. Modern manufacturing scenario and rough consumption of natural resources create huge challenges in front of human beings in the form of environmental degradation and wastage of material. The purpose of this study is to identify the barriers to green manufacturing (GM) from selected Small and Medium Enterprises (SMEs) in Delhi and NCR region and rank them as per their priority. An extensive literature review together with expert’s opinion was done to identify the GM barriers. A newly developed approach known as Best-Worst method (BWM) was adopted for the ranking of identified GM barriers. This study identifies 21 barriers to GM implementation which are arranged into 5 main barriers for well understanding. Further, the findings of this study show that, “Lack of new technology facilities and processes”, “Lack of experts related to new technology”, “Lack of expertise training programs”, “High initial capital cost to implement GM” and “Weak Legislation” are top-five barriers that lead to difficulties in GM implementation in SMEs while least important observed barrier is “Not enough and understandable information”. Therefore this study provides knowledge about the green manufacturing barriers and their ranking most severe to less severe that is most important to less important and this study also provides a systematic way to sort out the barriers in GM implementation according to their priority. In the end, the study provides conclusions and some implication of the study as well as the scope for future research.
Design and analysis of double wishbone suspension system
Authors: Upadhyay Pranav , Deep Mrinal , Dwivedi Aryan , Agarwal Ashutosh , Bansal Pikesh , Sharma Pradeep 
Published: February 2020

Abstract
Suspension system serves purpose of providing stability to vehicle which results improving comfortability of riding. It provides traction control and steering stability. This paper proposes a method for designing double wishbone suspension system for electric solar vehicle with damper to lower wishbone. Recent trends in suspension system have focused on improving innovations in ride quality and handling of vehicles. It maintains a viable spectrum of economic growth by reducing costs and increasing efficiency simultaneously. Theoretical analysis is conducted using Lotus and Solid works to design double wishbone suspension system. The analysis is done for tadpole geometry car with double wishbone in front and swing arm in the rear wheels. Results in the paper are going to improve vehicle handling characteristics by controlling camber, toe angles and A-arm’s length. This is accomplished by changing the length of A-arm and the ground clearance and attach angle with the chassis by hit and trial method and improving possible traction and maneuverability. Results of the paper are presented in form of graph as a result of simulation conducted.
Optimization of chassis for a solar powered vehicle
Authors: Upadhyay Pranav , Kumar Sharma Sachin , Kumar Gautam , Bansal Pikesh , Sharma Pradeep 
Published: February 2020

Abstract
This study aims at designing and analysis of roll cage for an electric solar vehicle fabricated for Imperial Society for Innovative Engineers ESVC (Electric Solar Vehicle Competition) 2019. The vehicle will be powered by electric motor and charging will be done by solar panels which makes the design eco-friendly. This study focuses on the development of an optimized roll cage structure which will include the compactness of frame design, light weight and driver’s safety considering all the design ergonomics and the driver’s safety measures. Optimization is based on reducing weight, strength considerations and ergonomics consideration. Variation of materials, pipe diameters and 3-D structure is implemented during analysis. Analysis of roll cage is conducted using SolidWorks and loading conditions are taken as per standards. Three-wheel tadpole configuration is used for analysis purpose. Results are presented in form of graphs and SolidWorks analysis outputs.
Response of adhesively bonded single lap joint doped with MWCNT and Fullerene C60 in the adhesive to the tensile strength of the joints
Authors: Amit Kumar R , Asokan R , Priya Jhanji Kanu , Sarkar Sahil , Das Debajit 
Published: February 2020

Abstract
The basis for this research is to create joints that have greater joint strength and capability of carrying greater damage load. The structural damage behaviour of adhesively bonded single lap joints (ABSLJ’s) was investigated. Laminates formed by carbon fibre woven in plane weave pattern and bonded by epoxy were used as adherend. Since a variety of nano materials are currently in use and are said to improve the damage strength of the composite when dispersed in them during the fabrication, two such nano materials namely multi walled carbon nano tube (MWCNT) and Fullerene C60 in different weight percentages of 0%, 1%, 3%, 5% and 7% were introduced by the method of ultrasonication to disperse them in the adhesive. A two part epoxy ROTEX EP - 416 resin and ROTEX EH – 153 hardener mixtures were used as adhesive for creating the joints. Results stipulate that the addition of MWCNT nanofillers in 1 wt % and 3 wt % in the adhesive has lead to a considerable increase in the tensile damage load of the ABSLJ’s by about 93% and 199% respectively. While the addition of 1 wt % Fullerene C60 in the adhesive increased the failure load but there was not much significant improvement when compared with the same percent of MWCNT.
Reducing soldering defects in mobile phone manufacturing company: A DMAIC approach
Authors: Garg Anshula , Raina Kalhan , Sharma Richa 
Published: February 2020

Abstract
A DMAIC (an effective tool) approach has been presented in this paper for reducing defects in soldering in an endeavor to approach six sigma quality level in a mobile phone manufacturing company. DMAIC helps expose and kill the root causes of defects in the process and thereby helps achieve higher customer satisfaction by means of improved quality. The case study was conducted in an electronics manufacturing industry engaged in an assembly of mobile phones. Post successful implementation of Six sigma - DMAIC in the assembly processes, ppm defectives dipped from 3800 to 200, which is a massive 94.74 percent reduction in ppm defectives.
Exergoeconomic and enviroeconomic analyses of single slope solar desalination unit loaded with/without nanofluid: A comprehensive review
Authors: Bandhu Singh Desh , Bansal Gagan , Kumar Yadav Jeetendra , Kumar Navneet , Tiwari Sumit , Raturi Anuj 
Published: February 2020

Abstract
The exergoeconomic and the enviroeconomic analyses of basin type single slope distiller unit based on solar energy can play an important role for mitigating the contemporary problem of acute shortage of drinking water throughout the world particularly developing and under developed countries. The technology of solar distiller unit has been known to humankind since the 16th century; however, it has not been preferred for purifying water on a large scale till date because of low potable water output, high initial investment, and non-availability of a technician at the local level. This technology is simple in nature and has the potential to mitigate the drinking water shortage; however, it has not been fully explored so far. A lot of configurations have been reported by various researchers since the development of solar distiller unit technology. This paper summarizes some of the important contributions reported so far on the basis of exergoeconomic and enviroeconomic parameters of single slope solar desalination units by incorporating the effect of nanofluid. A comparative study has been presented followed by a detailed discussion about exergoeconomic and enviroeconomic parameters of a single slope solar desalination unit loaded with/without nanofluid. It has been observed that the application of water-based nanofluid in the distiller unit results in the enhancement of performance. At last, the future scope has been presented.
Power Stability Control Strategy of the WPT System Based on Load Detection
Authors: Zhang Ming , Huang Xueliang , Tan Linlin , Liu Han 
Published: February 2020

Abstract
The output power fluctuates when offset occurs between the receiving coil and the transmitting coil or load equivalent impedance changes in a wireless power transfer system (WPT). These two conditions will affect the safety of the system and the life of the battery load. Therefore, effective control methods are needed to ensure the stability of the load power. This paper analyzes the WPT system with LCC/S compensation topology and the secondary side containing DC/DC circuit. The relationship between mutual inductance and load voltage and current, mutual inductance and the system transmission efficiency, DC/DC circuit duty ratio and load voltage and current are deduced. The output power stability control strategy through load voltage and load current detection and control of DC/DC circuit is proposed. Finally, the WPT system with 1 kW output power is built through simulation and experiment, which verifies the effectiveness and correctness of theoretical analysis and control strategy in this paper.
A Scheduling Model for Wind Power Consumption Considering Source-Charge Coordination of Combined Heat and Power System in Low-Carbon Environment
Authors: Lang Yifan , Xu Dan , Liu Shuyan , Hu Linxian 
Published: February 2020

Abstract
Increasing the penetration and consumption rate of new energy sources will help reduce or control carbon dioxide emissions and better promote green and low-carbon development. Based on the establishment of deep peak-load regulation model of pure condensing thermal power units, the model for the expansion of combined heat and power plant adjustment range, interruptible electro-thermal flexible load model and combined heat and power units carbon emission model, this paper introduces a quota-based carbon emission trading mechanism and constructs a source-load coordination scheduling model of combined heat and power system that considers the characteristics of heating network and aims at minimizing the total cost of units operation and carbon emission trading. The total coal consumption and wind curtailment absorption effect in three cases are compared by cases study. The outcomes display that the model in this paper can coordinate the scheduling resources on both sides of source and load, further diminish the total coal consumption and improve wind power consumption capacity based on improving the flexibility of source and load side, and achieve wind power consumption in low-carbon environment.
Study on Control Strategy of Microbus Power System Based on Branch-and-Bound Algorithm
Authors: Chong Liwen , Kang Chunjian , Zhang Zhang , Huang Jianwen 
Published: February 2020

Abstract
With the development of information technology, the scale of data center infrastructure has become larger and larger, which has always brought many challenges, such as unbalanced power load, high energy consumption, small scalable space and so on. In recent years, a distributed power supply structure, namely microbus power supply, has emerged, which is different from the traditional power distribution mode in computer room. It can adjust the power load distribution online in real time. This paper analyses the advantages of this micro bus structure power supply mode, and optimizes the cabinet power collection strategy based on branch and bound algorithm. By modeling and simulating the power consumption of the computer room in a real data center, the experimental results show that the proposed algorithm can greatly reduce the unbalance rate of the three-phase power supply equipment in the upper end of the computer room. Compared with the traditional power supply mode, it can reduce the maximum power imbalance by 49.88%.
Thrust Estimation for Aero-engine Based on Deep Convolution Neural Network
Authors: Wang Binbin , Xu Jianguo , Liu Xingyi , Zheng Qiangang 
Published: February 2020

Abstract
Aero-engines’ main task is to provide thrust for military or civil aircraft, so direct thrust control technology becomes one of the important research directions in the aero-engine control field. Thrust estimator design is an important part of direct thrust control. To overcome the shortcomings of traditional thrust estimation methods, such as low accuracy and poor robustness, a deep convolution neural network (DCNN) was introduced to design thrust estimator for aero-engine. Taking a turbofan engine component-level model as the objective, 100000 data samples were generated through simulation for training and testing the estimator. Twelve measurable parameters, such as fuel flowrate (W
f), combustion chamber exit temperature (T
4), high pressure rotor speed (HPS_N
mech), low pressure rotor speed (LPS_N
mech), nozzle exit temperature (T
8), etc. were selected as the input features of the estimator, and engine thrust was used as the output label. The effects of training data and test data partition ratio, convolution and pooling layer number, convolution kernel size, pooling window size and channel number of convolution/pooling layers on the performance of the thrust estimator were compared and analysed. Furthermore, the performance of the DCNN based thrust estimator was compared with that of traditional thrust estimators based on BP neural network and support vector machine (SVM). The validation results show that the DCNN based thrust estimator proposed in this paper has excellent thrust estimation performance, and its average accuracy can reach as high as 0.11%.