Miracle-dz/UniFAR-FTUs huggingface dataset:
Gate Driver Architectures Impacts on Voltage Balancing of SiC MOSFETs in Series Connection

In power converter configurations like multi-cell, multi-level, series connection of power devices etc. under very high switching speeds, several dv/dt sources generated at different floating points produce conducted EMI perturbations from the power part to the control part through the many gate driver circuitries. The modifications of the parasitic capacitive propagation paths between the power and the control sides have impacts on the circulating current produced by high dv/dt, which, in turns, affects the voltages distributions (static and transient) among the power devices. This paper presents news architectures for gate drivers power supplies implementations in series connection to minimize parasitic currents, especially reducing the common mode currents and to minimize the unbalance voltages of SiC-MOSFET devices in series connections. Simulations and experiments validate the advantages of the gate driver power supplies proposed architectures on the common mode currents and drain-to-source voltages of series-connected devices.
Enhanced and directional single-photon emission in hyperbolic metamaterials

We propose an approach to enhance and direct the spontaneous emission from isolated emitters embedded inside hyperbolic metamaterials (HMMs) into single-photon beams. The approach rests on collective plasmonic Bloch modes of HMMs, which propagate in highly directional beams called quantum resonance cones. We propose a pumping scheme using the transparency window of the HMM that occurs near the topological transition. Finally, we address the challenge of outcoupling these broadband resonance cones into vacuum using a dielectric bullseye grating. We give a detailed analysis of quenching and design the metamaterial to have a huge Purcell factor in a broad bandwidth in spite of the losses in the metal. Our work should help motivate experiments in the development of single-photon sources for broadband emitters such as nitrogen vacancy centers in diamond.
Physical Properties of Pure and Nano Ag Doped Liquid CrystallineCompounds Containing 1,3,4-Oxadizole Unit

Dielectric properties and other physical properties such as electrical conductivity (AC) and relaxation time or activation energy have been studied for two systems pure LC [V]6,6, [V]7,6, [V]8,6, [V]6,7, [V]7,7 and [V]8,7 and their doped with silver nanoparticles. The results show the increasing in real dielectric permittivity I­ with increasing length terminal chain. So the real dielectric permittivity increasing with raising temperature. To compare between the values of (400) Hz and (4000) Hz we observe these values at the low frequency are larger than that in high frequency. Generally, one can see that the doping of Ag nano particles effectively reduced the permittivity of the LC materials with its large electric dipole moment. The electrical conductivity σ value for pure LC samples in general increases with increasing temperature. So we observed increasing of electrical conductivity values at high frequency. The time scale is discussed in terms of the Arrhenius plot. Generally, with increasing the temperature the time period that spends by molecules at the transition state will increase. The activation energy Ea values show the increase in the activation energy to the doped systems.
Comparison and cost benefit analysis of different data sets used for determining mollusc evolution: a case study of the cryptobranch nudibranch Halgerda (Mollusca: Gastropoda)

Several approaches to examining the evolution of organisms have been tested over the past several decades. Specifically, morphological and molecular (DNA sequences) data sets are the most widely used methods to test a phylogenetic hypothesis. A cost benefit analysis of previously published studies of nudibranch mollusc phylogeny is presented. The previous studies utilized different types of data sets to derive hypotheses of relationships. The present cost benefit analysis examines the usefulness of the different data sets to verify an existing species level phylogeny. The existing hypothesis had been derived from morphological data only. Results of the present analysis indicate that two of the four data sets used, DNA sequence data and morphological characters, are the most effective when measured in terms of robustness of the resultant phylogeny and considering cost and time spent on the analysis. The other two data sets: sperm morphology and natural product chemistry were found to be valuable at higher taxonomic levels. Conclusions from the cost benefit analysis indicate that combinations of data can provide valuable insight into evolutionary relationships, allowing the researcher to further examine a hypothesis from various perspectives. Those perspectives include the molecular evolution of the organism, morphological character evolution, chemical evolution and reproductive evolution at a cellular level. Using a multidisciplinary approach to systematics reveals the complexities of evolution.
Entrainment, Mixing, and Microphysics in Trade-Wind Cumulus

The vertical evolution of microphysics in trade-wind cumuli (Cu) observed from the NCAR C-130 research aircraft during one flight of the RICO (Rain in Cumulus Over the Ocean) study is analyzed. Conditional sampling of > 200 Cu traversed on this flight is used to chose Cu for which the aircraft penetrated single and growing Cu turrets about 250-m below cloud top where maximum LWC is often found and where radar has often observed initial stages of precipitation. The vertical evolution of the sampled set of Cu was assumed to follow Lagrangian behavior. The entrainment rate, entrained parcel scales, mixing mechanisms, and effects on the droplet size distribution are measured and evaluated. A parcel model is applied over the 1100-m maximum Cu height of the traverses to determine the relationship between the observed large number of small droplets and the fewer ultra-giant sea-salt nuclei (UGN) in order to assess the role of these nuclei in evolving the size spectrum and in causing a growing “drizzle tail”. New insight on these topics is obtained by using the PVM (Particle Volume Monitor) probe to measure incloud microphysics with 10-cm resolution.The results include the following: Entrainment causes primarily dilution of the drops without significant size changes, thus either extreme inhomogeneous mixing or more likely homogeneous mixing resulting from mixing with cool and humid entrained air take place. The entrained parcels are surprisingly small following lognormal behavior and decaying rapidly upon entering the Cu, as a result super-adiabatic drops are not evident. The entrained parcels are consistent with the Bragg-scattering “mantle echo” often observed by radar in small Cu. The FSSP (Forward Scattering Spectrometer Probe) droplet spectra are nearly constant with height. These “self-preserving” spectra are a result of an approximate balance between dilution by entrainment of droplets originating at cloud base, droplet activation on entrained CCN (cloud condensation nuclei), and detrainment and coalescence losses. Sea-salt nuclei follow Woodcock’s wind dependence, and are shown with the parcel model to play an important role in forming the observed drizzle that increases with cloud height. Accretion is the dominant coalescence mechanism near cloud top in these Cu.
Fiber-based ultraviolet frequency sweep laser

Keywords: Resonance Raman; Ultraviolet Raman; frequency sweep; laser Abstract. A resonance Raman detection system (RRDS) is proposed in this paper. The system is composed of a miniature ultraviolet frequency sweep laser (UFSL) and a controller and data analyzer (CDA). The UFSL consists of a pulse semiconductor laser (PSL) module, a fiber laser module (FLM), and an ultraviolet frequency sweep module (UFSM). Among the molecules of the tested object, those molecules, whose resonance Raman excitation wavelength equals the ultraviolet sweep wavelength and Stoke Raman spectral intensity will then increase to 10 4 to 10 6 times due to the resonance Raman effect, can be detected in the case of extremely tiny content. The advantages of the RRDS include integral structure of electronics and optical fibers, miniature of UFSL, fast regulation of the ultraviolet laser wavelengths, elimination of fluorescence interference.
The Multilevel Analysis of Surface Acting and Mental Health : A Moderation of Group Emotional Contagion

The purpose of this study is to investigate the relationship among surface acting, mental health, and group emotional contagion. According to the job demand-resource model and social information processing theory, this study attempts to establish a comprehensive research framework among these variables, and furthermore tests the moderating effect of group emotional contagion. Experience sampling methodology (ESM) will be employed to track 118 service providers over the period of ten workdays by questionnaire, and this study conducted multilevel analysis. The results showed that surface acting will negatively affect the mental health. In addition, the positive group emotional contagion have significant moderating effect on the relationship among surface acting and mental health. However, the moderating effect of negative group emotional contagion is not significant. Finally, this study discusses managerial implications and highlights future research suggestions. Key-Words: surface acting, mental health, group emotional contagion
A Multi-Step Method to Calculate the Equilibrium Point of the Continuous Hopfield Networks: Application to the Max-Stable Problem

The Continuous Hopfield Networks (CHN) is a neural network tools which can be used to solve many problems like auto-memory and optimization problems. The dynamics of the CHN is described by differential equations system which is hard to solve analytically. That is why, the researchers use the Euler Cauchy method to calculate the CHN equilibrium point. Unfortunately, this method suffers from several problems, especially quality of the decision for a large step, sensibility to the slope function parameters and to the initial conditions. In this work, we use the well-known multi-step numerical method called Adams– Bashforth method, which is strong in terms of stability and performance, to calculate the equilibrium point of the CHN associated with the max stable problem. This method introduces an intermediary step to improve the Euler Cauchy method precision. The experimental results show that the (CHN+Adams-Bashforth) method produce a large max stable sets in comparison with the (CHN+Euler-Cauchy) method.
OPTIMIZATION OF CHANCE CONSTRAINED REDUNDANCY ALLOCATION PROBLEM WITH NON- CRISP COMPONENT RELIABILITIES

In this paper, we have considered the optimal solution of the reliability-redundancy allocation problems (RAP) involving chance constraints in non-crisp environment. The reliabilities of the components are not fixed numbers rather they are non-crisp/imprecise numbers. Also the constraints in the RAP considered are chance constraints which are stochastic in nature. We have proposed a stochastic simulation based Genetic Algorithm approach for solving the reliability optimization problems of the type mentioned in this paper. The impreciseness has been considered in terms of the stochastic approach and the interval approach. In case of the stochastic approach, the reliabilities of the components are taken to be random variables which are distributed normally. After that Monte-Carlo simulation method is used to convert the chance constraints into the deterministic ones. The changed problem is then solved by the real coded genetic algorithm based on stochastic simulation and the constraint handling procedure. Few numerical examples are reported to explain the efficiency of the projected method.
Providing Lifestyle Counseling to Cancer Patients during Routine Consultation: Instrument Development and Reliability

Lifestyle factors are widely being implicated in the prognosis and recurrent development of many cancers. As the incidence of various cancers is rapidly increasing in Nigeria, with limited and expensive treatment options; lifestyle changes have been proposed to help curb the disease. The aim of this study is to elicit the salient behavioral, normative and control beliefs of Nigerian doctors regarding providing lifestyle counseling to cancer patients and developing a valid and reliable questionnaire to this effect based on the Theory of Planned Behavior. Three phases of the theory are described including; belief elicitation, questionnaire development and pilot study. The elicitation study identified the salient modal beliefs underlying Nigerian doctor's motivations to provide lifestyle counseling. A questionnaire was constructed incorporating all the key theoretical constructs of TPB, content validated by three experts and piloted on a sample of 30 doctors for internal consistency and temporal stability analysis. The questionnaire proved to be reliable with Cronbach's alpha coefficients of >0.7 and significant Intraclass correlation coefficient was observed for most variables. The study shed light on the beliefs of Nigerian doctors on providing lifestyle counseling and the instrument developed demonstrated acceptable evidence of content validity and reliability.
Hurricane's maximum potential intensity and surface heat fluxes

The concept of Maximum Potential Intensity (PI) relates the maximum velocity of tropical storms to environmental parameters. Since its original formulation by Emanuel (1986), two major modifications were made resulting in a considerable range of predicted PI values. First, dissipative heating was suggested to increase maximum velocity by up to 20%. Second, the power expended to lift water (the gravitational power of precipitation) was recently suggested to reduce maximum velocities by 10-30%. Here we re-derive the PI concept separating its dynamic and thermodynamic assumptions. First, we show that there is no ambiguity from dissipative heating: irrespective of whether thermal dissipation occurs or not, the PI concept uniquely relates maximum velocity to the latent heat flux (not the total oceanic heat flux as in the original formulation). Our revised velocity estimate is independent of sensible heat flux. Second, we clarify that accounting for the gravitational power of precipitation has little impact on PI. Third, we demonstrate that a key feature of the PI concept is that the negative work of the pressure gradient in the upper atmosphere consumes all the kinetic energy generated in the boundary layer. This dynamic constraint is independent of thermodynamic assumptions such as isothermal heat input from the ocean, and thus can apply to diverse circulation patterns. Finally, we show that the maximum kinetic energy per unit volume in the PI concept is approximately equal to the partial pressure of water vapor at the surface.
The South Tibetan detachment system facilitates ultra rapid cooling of granulite‐facies rocks in Sikkim Himalaya

The eastern Himalaya is characterized by a region of granulites and local granulitized eclogites that have been exhumed via isothermal decompression from lower crustal depths during the India‐Asia collision. Spatially, most of these regions are proximal to the South Tibetan detachment system, an orogen‐parallel normal‐sense detachment system that operated during the Miocene, suggesting that it played a role in their exhumation. Here we use geo‐ and thermochronological methods to study the deformation and cooling history of footwall rocks of the South Tibetan detachment system in northern Sikkim, India. These data demonstrate that the South Tibetan detachment system was active in Sikkim between 23.6 and ~13 Ma, and that footwall rocks cooled rapidly from ~700 to ~120 °C between ~15‐13 Ma. While active, the South Tibetan detachment system exhumed rocks from mid‐crustal depths, but an additional heat source such as strain heating, advected melt and/or crustal thinning is required to explain the observed isothermal decompression. Cessation of movement on the South Tibetan detachment system produced rapid cooling of the footwall as isotherms relaxed. A regional comparison of temperature‐time data for the eastern South Tibetan detachment system indicates a lack of synchronicity between the Sa'er‐Sikkim‐Yadong section and the NW Bhutan section. To accommodate this requires either strike‐slip tear faulting or local out‐of‐sequence thrusting in the younger segment of the orogen.
SEM-Neural network modeling to predict the mobile commerce adoption in Oman ( Full Paper Submission )

The development of mobile telecommunication devices having the Internet capabilities have supported the growth of mobile commerce (m-commerce) services. The purpose of this paper is to empirically examine key determinants that affect consumer intention to adopt m-commerce services in Oman. Based on the Technology Acceptance Model (TAM) and the unified theory of acceptance and use of technology (UTAUT) model, the research model is developed. The proposed research model was empirically tested using online survey data. The modelling methods, neural network and structural equation models were employed for testing hypotheses. The findings of this paper suggested that social influence and variety of services are the most important predictors of mobile commerce in the context of a developing country such as Oman.
Cooperative Adaptive Control for Consensus of Leader-Following General Linear Multi-Agent Systems in Directed Communication Topology

This paper investigates the consensus problem for leader-following multi-agent systems with general linear dynamics in directed communication topology. The fixed directed communication topology is considered. To adjust the coupling weights of neighboring agents, an adjacent state feedback protocol with an adaptive law is developed. LaSalle’s invariance principle is used to analyze the stability. The consensus for multi-agent systems under directed communication topology containing a directed spanning tree with the leader as the root can be realized. The design method is based on Riccati inequality as well as algebraic graph theory. Finally, two examples are shown to illustrate the performance of the present controller.
The Generational Turnover in Agriculture: Theoretical Problems and Empirical Evidences

The purpose of this study is to understand the causes determining the exit from the sector of young adults. Drawing from migration and succession theories, a number of factors, hypothesised to influence the decision, are tested using a Probit model. The findings lend support for the selectivity hypothesis: low incomes are negatively related with the propensity to stay in the sector. The exit of young could be related to the low earnings and to the preferences of individuals. The intergenerational transfer seems to be the result of an involvement in the farm activity.
Transfer-matrix modeling of four-wave mixing at the band edge of a one-dimensional photonic crystal

We present a modeling of a degenerate four-wave-mixing nonlinear process in one-dimensional photonic crystals. The model is based on the nonlinear extension of the transfer-matrix description of propagation in the structure. The influence of light localization, near the band edge of the structure, on the enhancement of the phase-conjugate reflectivity is studied. The phase-conjugate reflectivity is shown to increase as the eighth power of the number of layers with an additional large dependence on the index contrast of the structure. In both cases the enhancement is accompanied by a strong reduction of the resonance width, which may lead to some limitation of the enhancement when ultrashort pulses are used. A strong influence of the losses on the nonlinear efficiency of the structure is also predicted with a great importance of scattering losses at the multiple interfaces of the structure.
Reasons in Favor of a Hubble-Lemaître-Slipher's (HLS) Law

Based on historical facts, revisited from a present-day perspective, and on the documented opinions of the scientists involved in the discovery themselves, strong arguments are given in favor of a proposal to include prominent astronomer Vesto Slipher to the suggested addition of Georges Lemaître's name to Hubble's law on the expansion of the Universe, and thus eventually call it Hubble-Lemaître-Slipher's (HLS) law.
Plagiarism Detection in Code-Based Assignments

Many engineering and computer science programs include computer based courses in which students are evaluated on code that they write individually or in groups. Plagiarism of code is typically difficult to detect, because courses have several markers, who cannot readily compare current submissions to those of students in other classes or in previous years. Our team is currently developing a plagiarism detection Web service that allows instructors to submit code and detect similarities between assignments and between projects. The interface is Web-based and is designed to smoothly integrate into instructors’ marking activities. The presented Web service compares all uploaded assignments, and identifies structural similarities. Since our service is based on structural analysis, superficial changes to variable names or control statements are not enough to conceal plagiarism. The results of similarity analysis are summarized in a simple format that indicates which assignments are the most similar and reports differences between assignments at the fine grain level of lexical tokens. The strength of this automated approach is that it removes the burden of plagiarism detection from instructors. In addition, it is fully repeatable and also provides a high level of accuracy with no false negatives.
Voting in the Bicameral Congress: Large Majorities as a Signal of Quality

We estimate a model of voting in Congress that allows for dispersed information about the quality of proposals in an equilibrium context. In equilibrium, the Senate only approves House bills that receive the support of a supermajority of members of the lower chamber. We estimate this endogenous supermajority rule to be about four-fifths on average across policy areas. Our results indicate that the value of information dispersed among legislators is significant, and that in equilibrium a large fraction of House members' (40--50%) votes following their private information. Finally, we show that the probability of a type I error in Congress (not passing a good bill) is on average about twice as high as the probability of a type II error (passing a low-quality bill). (JEL C11, C13, D72, D78). The Author 2012. Published by Oxford University Press on behalf of Yale University. All rights reserved. For Permissions, please email: journals.permissions@oup.com, Oxford University Press.
Effect of synthesis method on stabilized nano-scaled Sb – V – O catalysts for the ammoxidation of propane to acrylonitrile

A new synthesis method to prepare V–Sb–O phases on Al2O3, and Nb2O5 substrates has been investigated and compared with previous works in which a conventional synthesis method was used. The new preparation method leads to an amorphous layer of Sb oxide, which had not been described previously; its Raman bands are reported for the first time. This new method provides an intimate contact between Sb and V during synthesis. It has a clear influence on the structure and catalytic properties of the final catalysts. The total amount (Sb + V), the Sb/V atomic ratio, and the specific support determine acrylonitrile production. Depending on catalyst stoichiometry, different preparation methods are preferred. Standard Sb2O3 suspension method is preferred at Sb/V atomic ratios above 1. The new tartrate method is preferred at Sb/V = 1 atomic ratio, resulting in the best catalytic performance.