bluuebunny/crossref_metadata_2025_split huggingface dataset:
Molecular dynamics simulations of ionic hydration of Na+ inside the nanochannel
Authors: Li J P , Li Y S , Wang Z , Wang H C 
Published: June 2020

Abstract
Molecular dynamics simulations were carried out to investigate the hydration of Na+ ion in the nanochannels. The height of the channels varies from 0.65 nm to 3.0 nm, and the surface charge density varies from 0 to -0.2991 C/m2. The simulation results showed that the channel height and surface charge had special effect on the hydration of Na+ ion, and the peak height of radial distribution functions and coordination number increased as the channel height and surface charge density decreased. In the region of electrical double layer, hydration radius increased with the decreased of the channel height and the surface charge density, but the hydration radius of the Na+ ion of the bulk region was kept at a constant.
Effect of heat treatment on the microstructure and mechanical properties of electroless nickel-phosphorus coatings
Authors: Cheng Kun , Wu Zhaofeng 
Published: June 2020

Abstract
Electroless deposition have been considered as one of the most important nickelbased coating synthesization methods because of their coatings uniformity, high wear resistance, excellent corrosion and electrical properties. In this paper, nickel-phosphorus coatings were synthesized by electroless method on medium carbon steel substrates. The effect of heat treatment on the microstructure and mechanical properties of nickel-phosphorus coatings were investigated in detail. Structural analyses suggest that the coatings remain amorphous structure if the annealing temperature is below 400 °C. The crystalline Ni and Ni3P were formed in the coatings when the annealing temperature reach 400 °C and the grains grown significantly with increasing the heat treatment temperature from 500 °C to 800 °C. The mechanical properties of the nickel-phosphorus coatings display a significant change with the different heat treatment temperature. It was found that the highest microhardness value and the best wear resistance property has been obtained under heat treatment temperature of 400 °C. The possible mechanism of the relationship between microstructure and mechanical properties was also explored.
Research on Microfluidic Chip Design and Droplet Related Technology
Authors: Zhen Su , XiaoMing Han , QuanJun Liu 
Published: June 2020

Abstract
Microfluidic Chips, also known as chip labs, integrate basic operating units in the fields of chemistry and biology on a chip. The droplet is a technique for controlling a small volume of liquid on a microfluidic chip. One of the two incompatible liquids is used as one continuous phase and the other as a dispersed phase, and the dispersed phase is dispersed in a continuous phase in a micro volume unit. Droplet fusion is the basic tool for controlling droplets in microfluidic devices and their use as microreactors, allowing precise mixing of reagents and fusion of samples at well-defined points in space and time.This topic is based on microfluidic technology, designed and processed PDMS chip, research on droplet generation and droplet fusion technology in microfluidic chip. Using a constant pressure pump designed by the laboratory to drive the sample injection, study the effects of continuous phase, discrete phase convergence angle, flow path width, liquid flow rate, etc. on the droplet formation of the cross-shaped structure. Based on the droplet generation technology, The subject then studied the droplet fusion technology, completed the droplet fusion chip design and processing, and achieved 1:1 1:2 fusion of two sample droplets.
Microdroplet event recognition and volume detection system based on flexible printed circuit electrode
Authors: Han Xiaoming , Su Zhen , Xu Ying , Liu Quanjun 
Published: June 2020

Abstract
Changes of microdroplet volume and the occurrence of different droplet events will exert a significant influence on droplet-based microfluidics. Droplet volume is closely related to reagent consumption and hydrodynamic resistance while droplet events reflect actual microchannel conditions. Based on current research, this work was dedicated to fabricate a reliable microdroplet sensing system with event recognition and volume detection function. Signal acquisition was on the basis of capacitance coupled detection and the coplanar fork sensing electrode was fabricated by flexible printed circuit(FPC) which was tens of times cheaper than photolithography. Wave peaks will appear while ink droplets traverse over the fork electrode from above. Shape features of waveform were used to recognize some simple droplet events and the period was employed to calculate droplet volume. Through experimental verification, droplet generation and droplet merging events could be recognized and distinguished by the system. In addition, the detection error between the theoretical volume calculated from formula and the actual volume derived from image analysis was less than 0.5 nL. The sensing system possesses the potential to achieve high throughput detection and surely can be employed to recognize more complicated droplet events in the future.
Flexible and ultrasensitive surface-enhanced Raman scattering substrates for the pesticide detection
Authors: Wang Runhua , Zhu Jia , Lin Guanzhou , Wu Wengang 
Published: June 2020

Abstract
In this paper, a simplified method for preparing surface-enhanced Raman scattering (SERS) substrates with spin-coating is reported. The green chemical synthesis of Ag nanoparticles (NPs) is environmentally friendly without complex instruments. The Ag NPs are coated on a polydimethylsiloxane (PDMS) film by spin coating for detecting pesticides. By this method, we can get the substrate with high sensitivity. The results showed that the substrate has a strong SERS signal even the concentration of thiram (pesticide) is down to 10−9 M. Compared with the allowed residue dose in food security (10−5 M), the detection limit of thiram is lower. On the other hand, PDMS has the advantage of flexibility and transparency, it can meet the demands of the detection of analytes on irregular objects.
Effects of Label-free Fluorescence Aptasensors with Different Aptamer Length on Quenching of Carbon Dots
Authors: Ren Linjiao , Xu Peng , Zhang Pei , Qin Zirui , Hang Xinxin , Li Chenlong , Meng Xiaolong , Xu Xiaoping , Jiang Liying 
Published: June 2020

Abstract
Label-free fluorescence aptasensors have the advantages of better detection sensitivity, simple manufacturing process and no pollution. In this experiment, the effect of aptamer base number on the performance fluorescence aptasensors has been studied. Thrombin of 15 base number, ATP of 27 base number and DA of 58 base number were selected, and then constructed three kinds of fluorescent probes about Au/Aptamer/CQDs nanostructures with gold nanoparticles and carbon dots. By studying the quenching degree of carbon dots with each probe, the quenching degree of carbon dots fluorescence by ATP probe was the highest, thrombin probe was the worst, and the DA probe was between ATP probe and DA probe. This indicates that with the increase of the aptamer base number in the probe, the more carbon dots are adsorbed on the aptamer and the more fluorescence quenching occurs, but the aptamer will be winding when it has too many bases, leading to the quenching unstable of carbon dots fluorescence. This study provides a useful reference for the construction and detection of fluorescent aptasensors, and has a great potential in the field of small molecule detection.
Long-term Stability Enabling Technology of Silicon-Based Piezoresistive MEMS Pressure Sensor
Authors: Liu S , Du X H , Zhu M J , Liu D 
Published: June 2020

Abstract
Silicon-based piezoresistive microelectromechanical systems (MEMS) pressure sensor is one of the best studied and commercialized devices among all MEMS devices due to simple structure, easy reading circuit, strong batch fabrication capability and low price. The biggest technical bottleneck of this sensor for high-end applications such as aerospace is long-term stability after packaging. Therefore, long-term stability improvement technologies, as the common key technologies, have been widely concerned by academia and industry. In this paper, three common enabling technologies including pulsating fatigue, thermal-cold cycling and vibration aging are adopted to evaluate the effect of long-term stability of silicon-based piezoresistive MEMS pressure sensors by using control variable method and orthogonal test (OT) method. The comparative test results indicate that all these three technologies can improve the long-term stability of the pressure sensor. In addition, an optimized combination of environmental stress parameters is found to improve the stability more than 90% higher than before the test. The long-term stability of the sensors through the optimal parameter combination aging method is better than the original factory method. The research results can be used for reference to improve the long-term stability of various silicon-based pressure sensors.
Reduced Graphene Oxide Wrapped Ultra-thin Silicon Nanowires for Lithium Ion Battery Anodes
Authors: Sun Fang , Hu Zhengguang , Wu Leyuan , Chen Jun , Luo Jie , Wu Xiaoling , Cheng Guoan , Zheng Ruiting 
Published: June 2020

Abstract
Nowadays, silicon is becoming a promising kind of material for lithium ion batteries (LIBs) because of its high theoretical capacities. In this paper, we developed a new Bi-metal assisted chemical etching (BACE) method to fabricate ultrathin silicon nanowires (UTSiNWs) with an average diameter of 30 nm, and fabricate reduced graphene oxide wrapped UTSiNWs (UTSiNWs@rGO). The UTSiNWs and UTSiNWs@rGO anode have a discharge capacity of 1011.6 mAh/g and 2013.1 mAh/g under the current density of 300 mA/g. Retention rate of the UTSiNWs and UTSiNWs@rGO anode are 93.3% and 76.6% respectively. Although the discharge capacity decreased due to the side reactions caused by the increased interface, the discharge capacity of UTSiNWs@rGO anode is still higher that of UTSiNWs anode because of the electron conductivity of the anode is improved.
Hollow sandwich-structured N-doped carbon-silica-carbon nanocomposite anode materials for Li ion batteries
Authors: Tang Xinde , Zhao Chunli , Li Zhanfeng , Zhang Yipin , Gu Shaonan 
Published: June 2020

Abstract
Silica has attracted much attention as a promising anode material for lithium ion batteries (LIBs), however, the low conductivity and unstable solid electrolyte interface (SEI) film limit its applications. In this paper, hollow sandwich-structured N-doped carbon-silica-carbon (CSC) nanoparticles was designed and prepared as anode materials for LIBs. The combination of polymer template approach and dopamine self-oxidation polymerization results in the conformal coatings on the surface of silica, which enhances the conductivity and stability of the composite materials. The hollow sandwich-structured material displays a high reversible capacity of 480 mA h g-1 at current density of 1.0 A g-1 and excellent rate performance, which can be attributed to the synergetic effect of the unique structure of hollow silica and N-doped carbon conformal coatings. The hollow sandwich-structured N-doped carbon-silica-carbon composite materials can be promising anode materials for LIBs.
A novel Cu2O/Cu grid for photoelectrochemical water spliting
Authors: Wang Xing , Chen Jun , Wu Xiaoling , Cheng Guoan , Zheng Ruiting 
Published: June 2020

Abstract
In this study, we reported a novel metal-semiconductor junction grid, which is made of Cu and Cu2O. The Cu2O film is deposited on the surface of a Cu grids by a simple electrochemical deposition method. Cu grids with 200 mesh has larger specific surface area than that of Cu sheet and will enhance the water splitting performance of photo-electrodes. Different Cu-Cu2O grid samples were prepared by changing the electrodeposition time and current. The best deposition parameters for Cu2O films on Cu grids were 3 hours of deposition time and 0.4 mA/cm2 of deposition current density. Under the best condition, the highest photocurrent density was −3.83 mA/cm2 which was higher than −2.36mA/cm2 of Cu2O films on Cu sheet.
Chaotic continuous growth model for dragons based on an ecological assessment system
Authors: Zhang Z C , Zhang B W , Chen J Q , Pan X T , Cyu W , Zhou W , Zhang D H 
Published: June 2020

Abstract
As a magical immortal creature in the game world or internet world, the dragon has a huge volume, excellent flight capabilities, and fire-spraying skills. Exploring the growth of dragons is innovate and legendary significance to the deep exploration of the universe by mankind. The characteristics of dragon growth and its influence caused by the environment were studied, the factors causing energy change in dragons were fully analysed, several differential-equation models were established to solve the changes of energy in dragons, and the influence of their environment on dragons. By studying the question of whether three dragons can coexist, we find that the habitat and range of one of them will change due to the different relationships between the other two dragons, so we established a two-layer system to solve the reciprocal competitive relationship between two dragons and established a chaotic continuous model of three dragons.These conclusions can also be used to evaluate the use of some easily dissipated device materials, calculate the life span and optimal service life of some materials, solve problems governed by system models with interactive effects therein.
Investigating the Moderating Effect of Demographic Variables on ICT Usage and Learning Process Quality of Higher Education in Medan, Indonesia
Authors: Lubis Andre Hasudungan , Idrus Syed Zulkarnain Syed , Sarji Asiah , Lubis Zulkarnain , Sutrisno  
Published: June 2020

Abstract
ICT and education seem inseparable. To improving the quality of learning process, ICT become the medium to assist the lecturer to transfer the knowledge to the students with more interactive. The study examined the moderator effects of demographic variables to influencing the usage of ICT towards learning process. A total of 260 respondents were selected from 733 of lecturers in three largest private universities in Medan, Indonesia. Data were collected through a survey among the participants manually. The research employs the Pearson Correlation to determine the relationship between variables and to test the hypothesis, the study uses the Simple Linear Regression and Hierarchical Regression. Result reveals that gender and educational level have no significant moderation. In contrast, teaching experiences, age, and department origin yet significant and positively as the moderator. Moreover, ICT usage is significant to impacting learning process.
A New Perspective of Web-Based Systems Quality Engineering Measure by Using Software Engineering Theory (ISO 25010): An Initial Study
Authors: Fadhel Ibrahim Eskandar Ibrahim , Idrus Syed Zulkarnain Bin Syed , Abdullah Mohd Syukri Yeoh , Ibrahim Amani Ali Elmetwaly Ali , Omar Mazni , Khred Ahmed 
Published: June 2020

Abstract
An extensive number of engineered frameworks and web assessment accessible are not good enough in the appraisal of systems’ quality. Thus, the comprehension of the systems’ quality in Mukalla, is basically critical. The research literature review aims at developing a successful novel theoretical approach for measuring system. The research contribution can be seen theoretically, in the methodology and practical perspectives. Theoretically, it presents a refined expansion of up-to-date DeLone and McLean’s information success framework (2003), TAM and ISO 25010 posits that some factors are directly related to satisfaction. The need to answer why users dislike system after the initial experience must be known. Methodologically, the contribution of the research study will be performed using census and other data collection processes from student were instruments will be validated by 8 experts. Lastly, some factors like loyalty, security and benefits would be adapted and employed on non-commercial settings
An Integration between Information Systems Engineering and Software Engineering Theories towards Engineering a Novel Instrument and Framework of Web-Based Systems Success: Hypothesis Testing
Authors: Fadhel Ibrahim Eskandar Ibrahim , Idrus Syed Zulkarnain Bin Syed , Abdullah Mohd Syukri Yeoh , Ibrahim Amani Ali Elmetwaly Ali , Omar Mazni 
Published: June 2020

Abstract
Systems and its success evaluation are an important prospect whereby, several studies can be traced, outlining its importance and vitality. However, there is a need to identify responsive specific factors to help better understand the systems determinants and its success evaluation. In the academia, systems are used to facilitate students, human resource, e-commerce activities any much more. Hence, examining the systems and evaluating as to what length it is successful is essential. This study aims to provide the results of the hypothesis testing. There have been 7 accepted hypothesis and 3 rejected hypotheses. Hypothesis results showed that ISO 25010 works better than TAM and DM Models in systems success measurement.
An Integration between Information Systems Engineering and Software Engineering Theories towards Engineering a Novel Instrument and Framework of Web-Based Systems Success: Results of the Pilot Test
Authors: Fadhel Ibrahim Eskandar Ibrahim , Idrus Syed Zulkarnain Bin Syed , Abdullah Mohd Syukri Yeoh , Ibrahim Amani Ali Elmetwaly Ali , Omar Mazni , Ghazi Alaan 
Published: June 2020

Abstract
Due to globalization and speedy of ICT and systems development, more emphasis needs to be on quality of systems and it requires an accurate, fast, effective system so that the success measure of system is essential. Currently systems rate of fall is still a high one of the reasons behind that is the weakness of the available instruments that being used for systems success measurement. This study aims to come out with a successful instrument for successfully system quality measuring. In this article, the results of the pilot test have been illustrated.
Evaluation of MRI images’ pixels intensity in three different MRI sequences
Authors: Arsat Zainal Abidin , Halim Kadarman A. , Shokri Amran Ahmed , Aziz Mohd Ezane , Shuib Solehuddin 
Published: June 2020

Abstract
Numerous types of Magnetic Resonance Imaging (MRI) sequence have been utilized for in vivo tibiofemoral contact area study has led inconsistency and disproportionate results. Thus, this study aim is to assess intensity differences of MRI images in three different MRI sequences. Ten healthy subjects with average age of 25.5 ± 4.76 consisted three males and seven females have no history of knee injuries participated in this study. Subjects were scanned through an Achieva 3.0T TX coupled with a SENSE spine coil 15. The selected MRI sequences were Turbo Spin Echo (TSE), Fast Field Echo (FFE) and Steady State Free Precision (SSFP). The results showed that the SSFP sequence consistently uncovered extra contact areas than the FFE and TSE sequences. Overall intensity value indicated that the TSE sequence intersected the highest intensity differences at important knee tissue components: trabecular-cortical and cartilage-synovial. The study demonstrated that the TSE sequence yields an accurate contact length detection which promoted a consistent tibiofemoral contact area for quantification. Also, this study suggested that the TSE sequence is a proper MRI sequence selection for in vivo tibofemoral contact area study.
Antecedent, Consequences, and Policies View of Cyberloafing among the Employees
Authors: Dmour Mohmmad M. , Bakar Hanif S. , Hamzah Mohammad R. 
Published: June 2020

Abstract
As the Internet has brought a lot of benefits to the work the Internet also creates new problems that were not found before as the cyberloafing. the cyberloafing defined as an activity involving the use of smart mobile and computers devices at the workplace for personal purpose activity by employees. In this paper, the researcher going to show some the demographic areas and the factors that effect on the employees’ attraction to cyberloafing from the previous studies have been shown consciences of cyberloafing in both of employees and organization. Finally, this paper will present some of the strategies to control and reduce the cyberloafing in the organizations.
Development of CFA Dashboard for Continuous Audit Using R Language
Authors: Shuhidan Shuhaida Mohamed , Haslan Muhd Farihin Azmy , Mohd-Nassir Mohd Daniel , Hamidi Saidatul Rahah , Mohd-Sanusi Zuraidah 
Published: June 2020

Abstract
Current manual auditing system may be difficult to the auditors, due to the enormous amount of data. Some auditors probably overlooked some illegal business processes that can cause money loss or embezzlement by the workers. Research study conducted to identify the problem by using the current manual financial auditing system found that the current system is not efficient in continuous auditing for business process. It is known that vast amount of financial data being processed during auditing may slow down the process during auditing. It can also be complex to handle which sometimes can be beyond auditors’ capability to audit business processes. Our research proposes an informative dashboard to assist auditors to assess risk. The informative dashboard is a category of operational dashboard. We apply big data management concept and implement the dashboard using the web development life cycle approach. The dashboard is implemented using R language and Shiny package.
The effects of interset rest duration on performance and muscle activation during resistance training
Authors: Azzeme Mohamad Shahrul Azzfar Mohamad , Tan Kevin , Sazali Muhammad Hannan , Japilus Siti Jameelah Md , Waqqash Ebby , Nadzalan Ali Md 
Published: June 2020

Abstract
The purpose of this study was to compare the effects of different rest intervals on performance and muscle activation during multi-joint (bent over row) and single-joint (biceps curl) exercises. Fifteen trained men that have experienced at least one year in resistance training were instructed to perform both exercises using three protocols in a randomized crossover design; each consisting of three sets with three different rest intervals; i) 60 seconds, ii) 90 seconds and iii) 120 seconds rest interval between sets. Each set was performed with hypertrophy designed loading (75% of 1RM) until fatigue. Results showed performing bent over row with 120 seconds rest interval produced higher number of repetitions and greater latissimus dorsi muscle activation compared to 60 seconds and 90 seconds rest interval. For biceps curl exercise, results showed 90 seconds and 120 seconds rest interval produced higher number of repetitions and greater biceps brachii muscle activation compared to 60 seconds rest interval. In conclusion, performing bent over row with 120 seconds rest interval interset and 90 seconds and 120 seconds rest interval during biceps curl exercise allow participants to produce greater lifting performance while recruiting more motor unit for activating the muscles in every set. The findings of this study is hoped to be used as a guideline for resistance training design planning in order to achieve optimum benefit while been time-effective.