Miracle-dz/UniFAR-FTUs huggingface dataset:
Numerical study of the effect of microwave discharge on the premixed methane-air flame

The effect of a microwave discharge on a premixed methane-air flame was studied numerically using detailed oxidization and chemionization mechanisms. A simplified numerical algorithm for microwave-flame interaction was developed. The predicted electron number density and spatial half peak width agree well with the experimental data. Numerical results showed that the electric field increases the flame speed by 20% at field strengths below the critical value to sustain the plasma. The enhancement effect increases as the mixture becomes lean or rich because of the increasing flame thickness. The results also demonstrate that the majority of the microwave power is added to the burned gas because of the slow electron recombination process. Key reactions affecting electron number density were identified via a kinetic sensitivity analysis. The predicted flame speed enhancement qualitatively agrees with the experimental data, but quantitatively under-predicts the observed flame speed increase. The results give a good interpretation of the experimental observations but suggest that further research needs to be done to establish quantitative agreement between prediction and experiment.
Sinusoïdal flow of blood in a cylindrical deformable vessel exposed to an external magnetic field

The present work provides an analytical solution for the Sinusoidal flow of blood in a cylindrical elastic vessel exposed to an external magnetic field. The vessel is supposed to have non-conducting walls and the induced electric and magnetic fields are neglected. In other words, the well-known calculation of Womersley is revisited through the inclusion of the Lorentz force in the Navier-Stokes equations. A dispersion equation is obtained. This equation admits two types of solutions: the Young waves (mainly associated with radial deformation of the vessel) and the Lamb waves (mainly associated with longitudinal displacements in the vessel wall). It is demonstrated that the external magnetic field has an influence on the wave celerities, on the fluid velocity profiles, and on the wall displacements. It tends to reduce the blood flow and flatten the velocity profile, in the case of Young waves. The pulsatile character of the flow is also dampened. However, these effects become detectable for high values of the Hartmann number ( M > 4, corresponding to B 0 > 36 T with numerical data pertaining to large human arteries) and remain negligible in the context of magnetic resonance imaging ( B 0 ≤ 3 T, or even 7 T).
Synthesis of thallium-leucite (TlAlSi2O6) pseudomorph after analcime

Abstract Thallium leucite, TlAlSi2O6, has been synthesized at 450°C for 7 days, under ambient conditions, by the transformation of dehydrated analcime NaAlSi2O6 in the presence of excess TlCl. This substitution of Tl for Na leads to confirmation of a thallium-leucite pseudomorph after analcime. Their optical properties, X-ray powder diffraction patterns, electron microprobe analysis, infrared spectra, and X-ray photoelectron spectroscopy have characterized the synthetic Tl-leucites. The IR spectra show that the mid-IR modes T-O stretching and T-O-T bending vibrations for TlAlSi2O6 are more resemblant of those for analcime than for leucite, KAlSi2O6. This resemblance implies that Tl cation enters the W-site rather than the S-site in the analcime structure: Na (S) + H2O (W) ⇌ ⃞ + K (leucite) ⇌ ⃞+ Tl (Tl- leucite), where ⃞ represents an S-site vacancy. The mechanism of this substitution is supported by the crystal chemical constraints: inasmuch as the S-site is smaller than the W-site, Tl+ cations being larger than Na+ plainly prefer the latter site to the former. One inference from the binding energy for Tl+ by XPS is that Tl+ occupies the extra-framework site in synthetic leucite pseudomorph, rather than the smaller tetrahedral site. The difference in Al/Si disordering between analcime and leucite and the nonstoichiometry due to the solid solution of the ⃞Si3O6 component into the leucite structure may provide a fundamental insight into understanding why TlAlSi2O6 deviates from the trend defined by K-, Rb- and CsAlSi2O6 leucite series on the a-c parameter diagram, inasmuch as these three cations in the leucite structure occupy the W-sites. Finally, synthesis of TlAlSi2O6 leucite has an implication for the existence of other polymorphs due to different degrees of Al/Si disordering, except for high- and low-temperature leucites already known: natural leucites crystallized directly through igneous processes are different from those formed by substitution of K for Na in analcimes.
Controlling Pesticide Loss through Nanonetworks

This work describes the feasibility of using high-energy electron beam (HEEB)-modified natural nanoclay (attapulgite) as an effective matrix to control the loss of pesticides that tend to discharge into the environment through washing and leaching, which causes severe pollution to both soil and groundwater. After irradiation by HEEB and because of thermal, charge, and impact effects, the originally aggregated attapulgite could be dispersed and form nanoporous networks, which could be beneficial for the binding of pesticides onto attapulgite. A loss control pesticide (LCP) was obtained when such attapulgite was added to a traditional pesticide. This pesticide–attapulgite complex could be retained by the rough surface of crop leaves, which increases the adhesion of pesticides on crop leaves and reduces pesticide loss, so that sufficient pesticides are supplied and the pollution risk of the pesticide is substantially lowered.
Additivity and synergism in vitro as displayed by mixtures of some commonly employed antibacterial preservatives

This investigation was motivated by the supposition that synergistic effects might be found in mixtures of some antibacterial agents which are commonly employed as pharmaceutical and cosmetic preservatives. From the findings, it is evident that when the components of a mixture attack different sites on the microbial cell, i.e., the drugs possess different mechanisms and/or sites of action, synergism is produced. Synergism was displayed by QAC/phenol combinations due presumably to the lowering of interfacial tension at the biophase by the QAC. Where the drugs possessed similar modes of action, no synergism was evident, rather additivity of effects was demonstrated as in the case of Phenol/PEA combinations.
What kind of university? International perspectives on knowledge, participation and governance

Introduction - what kind of university? , reflections of a scholar-gypsy. Part 1 Knowledge and curricula: changing research practices the link between knowledge and learning student learning and academic choice - the rule of coherence PhD or professional doctorate - is there a choice? Part 2 Access and participation: against the odds democratization of education the urban/metropolitan university - landgrant of the 21st century? Part 3 Governance - case studies: why universities need leaders are universities losing their soul? - a new governance structure for universities in the Netherlands changing the rules of the game - the transformation of decision-making patterns in Swiss universities since the early 1990s higher education development in transitional societies information technology and changing roles in the academy autonomy, governance and accountability. Part 4 Which futures? : restructuring the university of technological change the university of the future - place, process or paradigm? the future of the university - reasonable predictions, hoped-for reforms or technological possibilities?
Characterization of Thin MgO Films on Ag(001) by Low-Energy Electron Diffraction and Scanning Tunneling Microscopy

The evolution of the MgO(001) film morphology on Ag(001) was studied in dependence on the growth temperature (373−673 K) and grown MgO quantity (0.2−2 ML) by low-energy electron diffraction and scanning tunneling microscopy. We evidence an island growth mode of MgO for all temperatures. At 373 K, the MgO film exhibits a high island density, which is due to a too small surface mobility of the film compounds during the film growth. At a growth temperature of 673 K, silver hampers a perfect growth of MgO islands due to its high mobility, which leads to dendrites of MgO. The flattest and largest MgO islands are obtained at a growth temperature of around 573 K, which is a compromise guaranteeing a sufficiently high Mg or MgO mobility but also an enough low diffusion of silver.
THE ADDICTIVE PERSONALITY: MYTH OR CORNERSTONE OF PREVENTION AND TREATMENT?

The concept of an addictive personality offers an attractive and intuitive construct for defining the parameters of prevention, diagnosis and treatment of substance abuse and addictive disorders. However, despite the intellectual and practical appeal, it remains controversial, with researchers and practitioners heavily debating its fundamental validity. In a seminal research study, Alan R. Lang, in conjunction with the US National Academy of Science, found that while there was no single identifiable personality type that could be used to exclusively determine susceptibility to addiction or constitute an “addictive personality,” there are, however, significant personality factors that tend to underlie addictive behavior. Specifically, these included, impulsivity, sensation seeking, nonconformity, social alienation, tolerance for deviance, and heightened stress coupled with lack of coping skills. Proponents of the addictive personality paradigm argue that these common characteristics represent critical information for intervention and treatment, as well as in the realm of development and prevention. Conversely, opponents contend that not only does empirical research not support the conclusion, but neither does the theoretical framework of addiction as disease. They contend that this view is deterministic and undermines the complex and multifaceted nature of addiction, thus limiting the approaches to treatment and potentially increasing the stigma associated with addictive disorders. Currently, most researchers and practitioners would argue against the notion of a deterministic addictive personality, but consider the potential of individual personality factors to influence behavior in both positive and negative ways and thus, incorporate relevant strategies into a comprehensive treatment plan. As we now face a global epidemic of opioid abuse that surpasses previous waves of drug use in both magnitude and severity, perhaps it is time to reevaluate the role of personality as a contributor in both the development and rehabilitation of addiction and how such information, taken in context with other relevant factors, can best serve to combat the widespread epidemic.
Effects of Pb and Zn stress on Trichosanthes kirilowii seedlings growth and stress-resistance physiological factors

The study with pot experiment showed that under Pb and Zn stress,the biomass of Trichosanthes kirilowii seedlings decreased,their plant dwarfed,and the number of leaves with yellow spots increased.Pb had greater effects on the seedlings growth than Zn.With increasing concentration of Pb,the contents of photosynthetic pigments increased first and decreased then,but increasing concentration of Zn had lesser effects on them.The contents of UV-B absorbing compounds and the activities of superoxide dismutase(SOD)and peroxidase(POD)increased while soluble protein and saccharide contents decreased with the increase of Pb and Zn concentrations.T. kirilowii seedlings had definite tolerance to Pb and Zn stress,but their growth and stress-resistance physiological factors were inhibited to a greater extent when the Pb and Zn concentrations were higher.
Some Unconventional Organic−Inorganic Hybrid Low-Dimensional Semiconductors and Related Light-Emitting Devices

Structural, optical, electrical, and optoelectronic properties, as well as prototype light-emitting devices, are being reported for the two-dimensional (quantum well) organic−inorganic hybrid semiconductor systems based on the organic cations CH3(CH2)7CH═CH(CH2)8NH3+ (OL) and on the inorganic networks formed out of MX42− anions, where M = Pb and X = I, Br, and Cl. These new crystalline compounds show extremely intense excitonic bands at chemically controllable positions in the ultraviolet−visible spectral region, with excitonic binding energies of more than 180 meV at room temperature. These novel properties render them as strong potential candidates in optoelectronic applications, comparable to the artificial low-dimensional systems. Prototype light-emitting devices (LED) based on the above-mentioned compounds exhibit naked eye electroluminescence, in some cases, semicontinuous operation, for the first time at room temperature. In addition, these devices operate at relatively low voltages and are readily.
Characterization of an Unstable Rocket Combustor with He Addition

Preliminary results from a model rocket combustor designed for the study of how liquid oxygen/liquid methane (LOX/LCH4) combustion responds to velocity and pressure oscillations typical of combustion instability are described. The combustion chamber was designed to represent conditions relevant to a lunar ascent engine using LOX/LCH4, and to operate at a chamber pressure of 225 psia. The predominant mode of instability was the first width mode with a frequency of about 3000 Hz. Higher modes including mixed axial-width modes, albeit at a considerably lower amplitude. A linear array of gCH 4/H 2O2 elements was used to drive the combustion instabilities. The present study characterized the behavior of the combustor without the influence of an active (flowing LOX/LCH4) study element. Helium addition to the gCH 4 fuel was used in an attempt to modulate the amplitude of instability. The level of He addition did not produce a consistent trend in instability amplitude. Nomenclature f = speed of sound Lx = chamber width Ly = chamber length Lz = chamber height
Superstructure and Nonstoichiometry of Intermediate Pyrrhotite

To elucidate the relationship between the superstructure and chemical composition of the pyrrhotite group, natural crystals ofpyrrhotite, ranging between approximately F%Sro and Fe'rS'2, have been extensively studied by X-ray single crystal methods. Pyrrhotite crystals from the Kishu mine are mixtures of three 4C,4.88C, and 5C types. The 5C type is orthorhombic and has the cell dimensions a : 6.8848(14), b = 11.936(6), c = 28.6760(15), and diffraction aspect C*ca. In the Kohmori mine, various orthorhombic pyrrhotites of nonintegral type-the nC pyrrhotites-occur together with the 2C type. The observed n values range between 5.36 and 5.80. The 6C type from the Makimine Mine is metrically orthorhombic with a : 6.8950(2), b: 11.9536(4) and c : 34.518(2) but is really monoclinic with diffraction aspect F+/d. The relationship between the cell dimensions and the n value for the nC pyrrhotites, including the 5C and 6C types; from various localities indicates that the change of the n values depends mainly on the chemical composition. The relationship between the composition and the mean dvalue of II2 and022. which correspond to 102 by the hexagonal subcell, for the nC pyrrhotite has been obtained by the least squares method assuming a linear equation as follows:
Desarrollo de una aplicación web para gestionar proyectos

Application’s market for project’s and credential’s management is quite huge, nevertheless there are still some needs that are not fulfilled yet. This project focuses on the real problematic of team’s organization on the workplace and project management that graphic and web design companies are now facing with. Within this framework, this project gives a technological solution that could be implemented for solving this issue. Developing this project pretends to be the solution for creating new projects and for managing generated credentials. This app allows the automation of these processes for companies to develop this so-called processes from the very beginning, which means that companies could manage their available resources and controlling their timings in a more efficient way. Palabras clave: • PHP7 • Tareas • Wordpress • Laravel • Javascript • jQuery • REST • CRUD • VestaCP • Pusher • Echo • Vue • Axios • Gantt
In situ hot-stage AFM study of the dissolution of the barite (001) surface in water at 30–55 °C

Abstract This paper reports in situ observations of the dissolution behavior of the barite (001) surface in pure water at 30-55 °C using hot-stage atomic force microscopy (AFM). The dissolution at 30 and 40 °C occurred in three stages; however, at 55 °C, the dissolution behavior observed at the former temperatures started immediately after injecting water into the AFM fluid cell. The first stage of the dissolution was characterized by the retreat of the initial steps and continued for about 60 min at 30 °C and about 10 min at 40 °C. The second stage of the dissolution was characterized by the splitting of the initial one-layer step into two half-layer steps [fast (“f”) and slow (“s”) retreat steps] with different retreat rates and by the formation of etch pits. The large difference in the retreat rate of the “f” and “s” steps led to the formation of a new one-layer step, which showed slightly faster retreat rates than the “s” half-layer step at all temperatures. The splitting of the [010] one-layer step into two half-layer steps was observed only at 55 °C. During the third stage, the development of angular deep etch pits from an initial form with a curved outline differed at each temperature. The deep etch pits grew rapidly at higher temperature, but showed at least two different retreat rates for the (001) plane at each temperature, indicating the development of the pits along different dislocations (screw and edge dislocations). The activation energies (62-74 kJ/mol) for the step and face retreats in this study were significantly higher than those reported in earlier studies. Recalculations performed using only data obtained under similar conditions in previous studies led to activation energies of 66-79 kJ/mol. These results and the earlier report showing that the form of the deep etch pits changed from angular to bow-shaped at about 60 °C may indicate that the activation energy of barite dissolution in water is higher at lower temperatures as compared with higher temperatures, thus changing the rate-limiting step. Whether the vertical and lateral retreat rates of the barite (001) plane differ in dependence of temperature remains unclear; however, the activation energies of the retreat of the (001) face in deep etch pits tended to be slightly higher than that of the lateral retreat rates of steps or other faces in deep etch pits.
A Study on Combustion Characteristics and Flame Structure in a Triple Port Burner

In this study, we have examined co-flowing diffusion flames formed in a triple port burner. The coannual burner consists of three concentric tubes. Air flows in both inner (central) and outer tubes, and fuel flows in the annulus between these air tubes. These velocities are defined as U1A, U2F, and U3A (or U3N), respectively. The fuel is propane. Two diffusion flames are formed in the boundary of fuel and air. For comparison, nitrogen is ejected in the outer tube to examine the mutual effect of two flames. The luminous flame height was obtained by direct photographs. A laser induced incandescence (LII) technique was applied to examine instantaneous soot concentration. To discuss the mixing of fuel and air, a NO-PLIF technique was used, where NO is added in the fuel flow. Results show that, as the fuel velocity, U2F, is increased, the flame height becomes larger. When nitrogen is ejected in the outer tube, the flame height is larger. However, the flame temperature for both cases is almost the same. The LII measurement shows that there are two soot regions in two luminous flame zones, which are emerged in the downstream. The soot concentration in the inner flame is higher than that in outer flame when U1A U3A. The minimum soot concentration is achieved when U1A and U3A are the same.
Novel Magnetite Nanoparticles Coated with Waste-Sourced Biobased Substances as Sustainable and Renewable Adsorbing Materials

This study examines the possibility of using a biobased product isolated from urban solid wastes as a material for environmental technological applications. To this end, Fe3O4 nanoparticles (NPs) coated with different amounts of soluble biobased products (SBO) were synthesized as a low-cost nanoadsorbent for the removal of pollutants in wastewater. Particles of 10 nm diameter with an Fe3O4 core and SBO shell were obtained. The concentration of SBO employed in the synthesis had no effect on the size and structure of the NPs but ruled the pHPZC and aggregation of the nanoparticles in water. The cationic dye crystal violet (CV) was used as a model pollutant to test the adsorption capacity of the nanoparticles. The results indicated that both the medium pH and NP dosage were significant parameters to enhance the removal of CV. The results contribute to the studies that show how wastes can become a source of revenue through the industrial exploitation of their chemical value.
Polarized Raman scattering from single GaN nanowires

Raman spectra of single (hexagonal wurtzite) $\mathrm{GaN}$ nanowires grown by vapor-liquid-solid synthesis were recorded. By investigating the polarization dependence of the Raman intensities of the observed bands as a function of the angle between the long axis of the nanowire and the electric vector of the incident (and scattered) light, one is able to distinguish between nanowires whose crystallographic $c$ axis corresponds to (${c}^{*}$ directed), or is substantially perpendicular to (${a}^{*}$ directed) the long axis of the nanowire\char22{}the two preferred directions of nanowire growth. For ${a}^{*}$-directed nanowires, polarization-dependent Raman intensity analysis can also determine, within tolerable limits, the orientation of the crystalline $c$ axis with respect to laboratory-fixed coordinates. Simultaneous transmission electron microscopy (TEM) analyses confirm the conclusions derived from the Raman measurements. The polarization-dependent Raman intensities could only be understood if one assumed a complex-valued Raman tensor. The detection of resonance enhancement together with the tendency of the nanowires to grow with a high concentration of defects and the observation of yellow luminescence in the photoluminescence spectrum may account for the complex-valued Raman tensor we observe for $\mathrm{GaN}$ even at sub-band-gap photon energies.
How Influence the Accounting Information Systems Quality of Internal Control On Financial Reporting Quality

in the response of several financial scandals and corporation collapses, corporate governance, particularly internal control, comes to an attention of public. This research findings show that with effective internal control within the organizational boundary, management has reasonable assurance that it can enable businesses to achieve the objectives in accordance with compliance. It can be said that proper designed and functioning internal control mechanism can reduce the likelihood errors or fraud and hence organizations would perform as expected. Moreover, AIS provides financial information that is essential to monitor and manage organizational resources together with conventional accounting controls. The purpose of this study was to determine influence the accounting information systems and the effectiveness of internal control on financial reporting quality. The results showed that influence the accounting information systems and the effectiveness of internal control have a significant effect on the financial reporting quality. Furthermore it was found that the accounting information systems and the effectiveness of internal control have relation on financial reporting quality.