Miracle-dz/UniFAR-FTUs huggingface dataset:
Development Indicator Factors of Thai Engineering Graduates in Innovation: Testing Measurement Invariance by Low and High Level of Innovation Work Experience

The purpose of this research was:<br><br>1) to develop competency factor indicators of Thai engineering graduates in innovation;<br><br>2) to validate competency factor indicators model of Thai engineering graduates in innovation; <br><br>3) to test the invariance of the model of competency factor indicators of Thai engineering graduates in innovation had invariance between groups of low and high level of innovation work experience. <br><br>The participants of this research were 305 engineering graduates who works in variety occupations of companies. The research tool is the questionnaires surveyed via E-mail with the reliability of 0.934. Data were analysed using descriptive statistics, the Pearson’s correlation Coefficient and testing hypotheses by using SEM analysis and multiple group structural equation model analysis by Mplus program. The research results found that:<br><br>1) competency factor indicators of Thai engineering graduates in innovation consisted of two factors, namely general competency and specific competency to research. The general competency factor consisted of 11 indicators. The specific competency conducive to research factor consisted of 6 indicators. <br><br>2) The model of the competency factor indicators for Thai engineering graduates in innovation found that the model fit the empirical data. <br><br>3) The model of competency factor indicators for engineering graduates in innovation indicated invariance of model form had invariance between groups of low and high level of innovation work experience. The comparison of the chi-square value of a base line model with an observed model showed that the model had invariance between groups of low and high level of innovation work experience.
Type 1 & Type 2 Optical Limiting Studies in Disperse Orange-25 Dye-Doped PMMA-MA Polymer Films Using CW Laser

Materials with exceptional third-order nonlinear optical properties are critical to the continuing development of photonics and electro-optical devices such as those used in optical communications, networking, the optical computation for signal processing, and data storage devices. The nonlinear optical material research is generally focussed on improving the efficiency of optical wavelength conversion, optical amplification, nonlinear absorption, refractive index changes etc. which are input light intensity dependent. During last few years, the organic dye-doped polymer films are getting more attention due to their advantages in fabricating optimum photonics devices. In this paper, we have studied the nonlinear optical properties like nonlinear absorption and nonlinear refraction of an azo dye Disperse Orange-25 (DO-25) doped in Polymethyl methacrylate-methacrylic acid (PMMA-MA) polymer matrix using open aperture and closed aperture Z-scan experimental methods for continuous wave (CW) laser input. The optical limiting properties of these films are also studied using Type 1 and Type 2 configurations at different input power using continuous wave (CW) laser beams of 532 nm wavelength.The nonlinear absorption coefficient, nonlinear refractive index, and saturated output power for type 1 and type 2 optical limiting are determined.
The Microstructure of Complex Architectures in Open Collaboration: A Theory of Design Network Motifs

The established stream of literature on design architectures argues that designers should aim for modular architecture in order increase the system’s technical performance by lowering the propagation costs of the system’s design: A system with a small stable “core”, a cycle of coupled parts of the system, and a large variable periphery reduce the risk of technical feature and increase opportunity for innovation. However, such a core-periphery view ignores the micro-level dependency structures that emerge in open collaboration when a large number of developers produce a complex technical system at distance, virtually, and outside of formal employment relationships. In this paper, we develop a theory of design network motifs that accounts for the smallest design dependencies in the system that emerge in situ. Informed by the network theoretical concept of a “motif”, we introduce design motifs as the smallest unit of design interdependencies in a system architecture and develop a theory of design network motifs describe each system’s ‘motif fingerprint’ and explains how certain motif patterns affect the performance of a system as a whole. We empirically examine our design network motif theory using architectural data of the Open Stack repository NOVA, consisting of 2359 files and 1545532 lines of code. We extract all potential design network motifs created by 872 developers for 5 years. Our results show that design network motifs offer a new way to explain hidden dependencies in complex system architectures. Surprisingly, it is not just cycling that significantly impact a system’s performance but instead, a “feed-forward loop” motif. Our results contribute to the literature on design architectures and open collaboration more broadly.
Wage and Employment Cyclicalities at the Establishment Level

We document substantial cross-sectional heterogeneity of German establishments’ real wage cyclicality over the business cycle. While wages of the median establishment are moderately procyclical, 36 percent of establishments have countercyclical wages. We estimate a negative connection between establishments’ wage cyclicality and their employment cyclicality, thereby providing a benchmark for quantitative macroeconomic models. We propose and calibrate a labor market flow model to match various empirical facts and to perform counterfactual exercises. If all establishments behaved as the most procyclical ones, labor market amplification would drop by one-third. If all followed Nash bargaining, it would drop by more than two-thirds.
Exosome: Advanced Development and a Novel Therapeutic Strategy for Osteoarthritis and Cartilage Injury

Exosomes have gained increasing attention as they participate in cell cross-talk in pathological environments and are functional paracrine factors of therapeutic stem cells. Osteoarthritis (OA) is a common age-related degenerative joint disease, leading to a debilitating lifestyle for sufferers. However, currently no drugs on the market promote cartilage repair, and the patients usually have to undergo arthroplasty in the late stage of OA. Although significant progress has been made in the development of stem cells for the treatment of OA and cartilage injury, problems like immune rejection remain. Recently, increasing evidence has demonstrated that exosomes from the joint microenvironment play important and complicated roles in the progression of OA. Moreover, exosomes have also shown enormous therapeutic value on OA/cartilage injury. Here, we first critically examine the relationship between exosomes and the pathology of OA. Then, we will cover the current status of exosome as a delivery vehicle for OA/cartilage injury therapy, especially the relevant mechanisms. Next, the recent progress of tissue engineering with exosomes, especially for OA/cartilage injury, will also be discussed. Finally, the future directions of exosome-based OA/cartilage injury therapy will be outlined.
Short Circuit Analysis of Air Circuit Breaker

In this paper, the overall effect of the different parameters which affect the circuit breaker at the time of short-circuiting is to be elaborated. The air circuit breaker is a switching device that is used to make and hold current under normal conditions and to break the current under abnormal conditions. Due to the short circuit current, a greater amount of detrimental energy is emitted in the form of heat and magnetic force. So it is vital to calculate and analyze the electro-dynamic repulsive forces appearing on the movable conductor. By the usage of the finite element analysis, current, magnetic field, repulsive forces have been simulated with the assist of the contact bridge model. With different configuration and model simulations and experiments been carried out for repulsion forces. The end result shows the tremendous use of no of contact system in the model to gain efficient force at the contact surface.
Model Uncertainty in the Cross Section

We develop a transparent Bayesian approach to quantify uncertainty in linear stochastic discount factor (SDF) models. We show that, for a Bayesian decision maker, posterior model probabilities increase with maximum in-sample Sharpe ratios and decrease with model dimensions. Entropy of posterior probabilities represents model uncertainty. We apply our approach to quantify the time series of model uncertainty in North American, European, and Asian Pacific equity markets. Model uncertainty is countercyclical in these markets. It predicts investors’ asset allocation decisions across equity and fixed-income funds. In survey data, investors tend to be more pessimistic about equity performance during periods of higher model uncertainty.
Deflection Behaviour of Slab Pavement With Pile On Soft Soil

The existence of soft soil is one of the obstacles in building road infrastructure, where the carrying capacity of soft soil is very low and can create instability of a building above it, and this is still one of the serious problems that must be overcome. One solution to building a road over soft soil is by using the pavement with a glued plate system, this model is considered to be stronger when compared to the conventional slab pavement system because the addition of piles as pavement anchor can increase the stability of the pavement because it can increase the bearing capacity of the pavement plate. This research was carried out by an experimental test in the laboratory by making a prototype of slab pavement supported by piles. Applied lateral load is 1 kN, 2 kN and 4 kN from modification vibrator machine. Other than the experimental test, in addition, finite element method analysis carried out, and compared the results of the experimental test. The experimental results showed that an increase in lateral loading would increase the deflection of the slab pavement, for a lateral load of 1 kN there was a reflection of 0.21 mm and an increase of 34% for loading of 2 kN and an increase of 45% for loading 4 kN. The pattern is the same in the finite element method analysis, where there was a 9.3% increase for 2 kN loading and increased to 34% for 4 kN loading.
H Induced Decohesion of an Al Grain Boundary Investigated with First Principles: General Conditions for Instant Breakage and Delayed Fracture

The uniaxial tensile test response of a H decorated Σ5 [100] twist grain boundary (GB) in face-centered-cubic Al has been examined with first principles. The impurity shows a strong tendency to relocate during loading. To capture these H movements, the standard model framework was extended to probe loading-unloading hysteresis. If the maximum tensile stress accepted by the H decorated GB in the slow fracture limit is reached before the maximum acceptable strain, exceeding this stress may trigger a H influx-controlled destabilization, as opposed to 'immediate' breakage. Such 'delayed' failure appears likely whenever the H attraction to a GB displays a monotonic decrease with increased loading.
Modeling Grain Boundary Segregation by Prediction of All Necessary Parameters

A thermodynamic model of equilibrium grain boundary segregation in real binary systems is proposed which is based on the prediction of all the necessary parameters. These parameters are (i) the standard enthalpy, (ii) the standard entropy of grain boundary segregation, both related to ideal behavior, as well as (iii) the Fowler binary interaction coefficient describing real contribution. Application of the model is shown in detail for the example of iron-based binary systems and the prediction is compared to data published in the literature.
A Review of Whole-Body Vibration of Seated Occupants in Moving Vehicles

Farming and other occupations which require the operation of heavy machinery like tractors expose the operator to whole-body vibrations. This could cause various ailments and discomforts in the human body and could even lead to premature mortality. This paper presents a survey into the exposure of seated occupants to the whole-body vibrations and their effects. Various standard terms used for quantifying the whole body vibration exposure and their limiting values are discussed in this paper. The different variables which could influence the distribution of vibrations on the body of the occupants and their effects on the biodynamic response of the body are discussed in detail. A review of various modelling approaches to predict the biodynamic responses of the body and their key variables is also carried out.
Quantitative Empirical Research Study to Examine the Relationship between the Acceptance of the Virtual Private Cloud (VPC) and the Adoption of the VPC

Virtual Private Cloud (VPC) is a new deployment model of the cloud computing technology that was introduced to address the security concerns of cloud technology. VPC is a rapidly growing technology, addressing the market demand for a secure cloud environment. Like other new technologies, concerns and issues have surfaced with the adoption of the VPC solution. Organizations may be concerned about ease of use, usefulness, security, trust, which can have negative influences on the adoption of the VPC solution. The lack of scientific and empirical analysis using technology acceptance and adoption models brought an excellent opportunity for this research study. The purpose of this study is to examine the relationship between acceptance and the adoption of the VPC solution. The population sample consisted of individual users within the United States between 18 and 65+ years of age, with a total sample size of 400 of qualified respondents. The theoretical framework utilized in this study was based on the most widely used technology adoption models of TAM and UTAUT. An online web-based survey was conducted to assess the measurement and understanding of patterns demonstrated by participants. The study employed statistical data analysis, exploratory factor analysis (EFA), analysis of variance, and Chi-Square test of independence. The study leveraged the multiple regression quantitative methodology to determine the relationship between the acceptance and the adoption of the VPC. The results showed that security concern is not of much concern when adopting the VPC solution. This result also indicates that there is trust in the VPC solution to mitigate security threats. This result is aligned with the notion that VPC was introduced to address the security concerns of the other cloud computing deployment models such as public, hybrid, private, and community.
Hydrogen Induced Dislocation Core Reconstruction in Bcc Metals

Dislocation, playing a crucial role in the plastic deformation of metals, can be significantly affected by introducing solute elements. Hydrogen (H) embrittlement is one such example, while the underlying mechanism for H affected dislocation structural stability and mobility remains unclear and the role of H has been controversial. Here, using first-principles calculations, we demonstrate that the effect of H on screw dislocation in bcc metals is H concentration-dependent, signified by a H-induced transition of SD core structure. At low concentrations of H segregation, dislocation maintains the intrinsic easy-core structure, and H atoms are attached to the "periphery" of dislocation to enhance dislocation motion. In contrast, at high H concentrations, dislocation transforms into a hard-core, metal hydride-like structure, as H atoms become the "body" of dislocation to significantly reduce the dislocation mobility. Further, such local easy-to-hard transition is found to be induced by just one solute of other elements, including helium, carbon, nitrogen and oxygen, independent of solute concentration. Our work sheds new light on the H-dislocation interactions in bcc metals, having broad implications in the interstitial solute-related phenomena.
Preparation and Characterisation of ZnO Thin Films by Spray Pyrolysis Method

Zinc oxide (ZnO) thin film is a transparent conducting oxide thin film and has attracted significant attention because of its potential applications in optoelectronic, solar cells and heat mirrors. The ZnO thin films were deposited by spray pyrolysis method. The films were grown on glass substrates at 415, 445, 475 and 505 oC substrate temperatures. The transmittance in the visible region and energy band gap values range from 79% to 85% and 3.32 to 3.34eV respectively. Raman spectroscopic analysis indicates that there are two peaks at 436 and 556 cm-1. It was concluded that ZnO thin films with optimal growth conditions using spray pyrolysis is an excellent material for transparent conducting oxide films.
Improving Mathematics Achievement and Attitude of the Grade 10 Students Using Dynamic Geometry Software (DGS) and Computer Algebra Systems (CAS)

It has become a fact that fluency and competency in utilizing the advancement of technology, specifically the computer and the internet is one way that could help in facilitating learning in mathematics. This study investigated the effects of Dynamic Geometry Software (DGS) and Computer Algebra Systems (CAS) in teaching Mathematics. This was conducted in Zamboanga del Sur National High School (ZSNHS) during the third grading period of the school year 2015-2016. The study compared the achievement and attitude towards Mathematics between those students taught with DGS and CAS and those students who were taught without DGS and CAS. A quasi-experimental pretest-posttest control group design was used with two groups which was matched according to their mathematical level. An achievement test was developed and administered to assess the students’ achievement in Mathematics. Aiken’s attitude scale was also used to assess the students’ attitude towards Mathematics. The data were treated with One-Way Analysis of Covariance (ANCOVA) and t-test at 0.05 level of significance. The study revealed a significant difference between the mathematics achievement between students taught with DGS and CAS and those who were taught without it. The integration of DGS and CAS in Mathematics lessons leads to better academic achievement result compared with that of the conventional method of teaching. Moreover, there was no significant difference on the attitude level of the students between the two groups.
Mitigating Zero-Day Attacks in IoT Using a Strategic Framework

Internet of Things (IoT) aims at providing connectivity between every computing entity. However, this facilitation is also leading to more cyber threats which may exploit the presence of a vulnerability of a period of time. One such vulnerability is the zero-day threat that may lead to zero-day attacks which are detrimental to an enterprise as well as the network security. In this article, a study is presented on the zero-day threats for IoT networks and a context graph based framework is presented to provide a strategy for mitigating these attacks. The proposed approach uses a distributed diagnosis system for classifying the context at the central service provider as well as at the local user site. Once a potential zero-day attack is identified, a critical data sharing protocol is used to transmit alert messages and reestablish the trust between the network entities and the IoT devices. The results show that the distributed approach is capable of mitigating the zero-day threats efficiently with 33% and 21% improvements in terms of cost of operation and communication overheads, respectively, in comparison with the centralized diagnosis system.
Social Media and Financial News Manipulation

We examine an undercover SEC investigation into the manipulation of financial news on social media. While fraudulent news had a direct positive impact on retail trading and prices, revelation of the fraud by the SEC announcement resulted in significantly lower retail trading volume on all news, including legitimate news, on these platforms. For small firms, volume declined by 23.5% and price volatility dropped by 1.3%. We find evidence consistent with concerns of fraud causing the decline in trading activity and price volatility, which we interpret through the lens of social capital, and attempt to rule out alternative explanations. The results highlight the indirect consequences of fraud and its spillover effects that reduce the social network’s impact on information dissemination, especially for small, opaque firms.
Computer Simulation Model Effect on Students’ Academic Achievement in Computer Logic

The effect of Simulation Model on students’ academic achievement in Computer Logic was determined in this study. Quasi experimental design using non-equivalent groups of intact classes was adopted to address the research objective. The experiment was completed within fourteen (14) weeks. The study was guided by two research questions and two null hypotheses. The participants in the study were 181 second year NCE students from five Colleges of Education. Computer Logic Achievement Test (CLAT) with a reliability index of 0.77, was the instrument used for data collection. Mean and standard deviation were used to analyze data collected, while ANCOVA was used to test the null hypotheses at 0.05 level of significance. The study showed significant increase in the achievement scores of students taught Computer Logic using the Simulation Model. Significant differences were also observed in the achievement score increase in male and female students as a result of the use of the Simulation Model. Simulation approach was therefore recommended in the study as a reliable instructional delivery strategy for Computer Logic.
Synthesis, characterization of hydroxyapatite-lambda carrageenan, and evaluation of its performance for the adsorption of methylene blue from aqueous suspension

The present work describes the synthesis of hydroxyapatite-lambda carrageenan CaHAp-(λ-Carr) using an aqueous co-precipitation method. The characterization of the prepared hybrid compounds was achieved using chemical analysis, Fourier Transform Infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and specific surface area. The results gleaned from X-ray powder analysis proved the presence of (λ-Carr) and revealed that the increase of its concentration leads to the decrease of the CaHAp crystallinity. Fourier transform Infrared spectra show the presence of (λ-Carr) and CaHAp characteristic vibrations in the resulting product. Scanning electron microscopy analyses reveal that the morphology of particles was changed by grafting and they are characterized by aggregates of different sizes and irregular shapes. After grafting BET measurements yielded particle specific surface areas ranging from 93 to 260 m2 g−1 depending on the grafted biopolymer. The prepared products were, further, applied for the adsorption of methylene blue (a cationic dye) from aqueous suspension. The adsorption capacity was determined with respect to pH value, the initial dye concentration, time contact, and temperature. The kinetic, thermodynamic, and adsorption isotherm models were assessed for the description of the dye adsorption process. The experimental resulting data show that the prepared hybrid compound CaHAp-(λ-Carr) is an efficient adsorbent for the removal of dyes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45385.