Miracle-dz/UniFAR-FTUs huggingface dataset:
Teacher Leadership Development in Secondary Schools of Bangladesh

The notion of teacher leadership gains momentum and it brings the teachers into the central position, at both instructional and organizational level of practice, in schools. This review article aims to analyze the notion of teacher leadership, its importance and ways of development in secondary schools of Bangladesh. In this article, it is argued that teacher leadership development has to be at the heart of development initiatives in the field of education to ensure quality teaching-learning practices in schools. The study is mainly supported by literature, and policy documents and guidelines. However, there is a lack of research in the context of Bangladesh; therefore most of the literatures reviewed for this study are from the developed world, largely from a small number of countries. Although, many of the research show the optimistic implications of teacher leadership and its consequences in schools, few of them provide empirical evidence. Considering the transferability of the research findings, special attention has given to contextualize the implications for teacher leadership development in Bangladeshi secondary schools.
STRESS EVALUATION OF NANOCOMPOSITES WITH NANOPLATELETS

Graphite nanoplatelets consisting of one or a few graphene sheets are expected to be an excellent choice for the reinforcement phase of composites. While carbon nanotubes provide reinforcement in just one direction, graphite nanoplatelets are effective in two directions. Thus graphite nanoplatelets will yield a higher degree of stiffening and strengthening in most applications where these reinforcements are expected to be randomly distributed. In the present paper, a graphite crystal of a layered structure, which is embedded in a polymer matrix , is analyzed to investigate the effect of exfoliation. When the reinforcement volume fraction is kept constant, more uniform layer separation is shown to improve the stiffening efficiency and reduce the stress concentration in the matrix. The analysis result clearly shows the beneficial effect of full exfoliation. The analysis is further extended to the case of random distribution of graphite nanoplatelets with prediction of the resulting composite moduli. The results are discussed with a view toward developing guidelines on the dispersion quality required for the maximum reinforcement efficiency.
An overview of NACA 6 -digit airfoil series characteristics with reference to airfoils for large wind turbine blades.

This paper investigates the NACA 63 and 64 6-digit series of airfoils tested in the NACA LTPT in view to verify the RFOIL calculated airfoil characteristics for high Reynolds numbers. Some anomalies in the zero-lift angles of 15% and 18% thick airfoils from these series are identified, both in the airfoil clean case and in case of wrap-around roughness. It is found that RFOIL predicts the maximum lift coefficient at a Reynolds number of 3 million well, but consistently under predicts the Cl,max for Reynolds numbers of 6 and 9 million. It is, however, based on other comparisons at high Reynolds numbers unclear if this is due to an inability of the prediction code or to a deviation in the test results. The drag coefficient is under predicted with about 9% for a wide range of airfoils and Reynolds numbers. Due to wrap-around roughness the maximum lift coefficient decreases with 18% to 20%.
Broadband CPW-Fed Circularly Polarized Square Slot Antenna with Arc-Shaped and Inverted-L Grounded Strips

─ This paper presents a new wideband circularly polarized square slot antenna (CPSSA) with a coplanar waveguide (CPW) feed. The proposed antenna is composed of two arc-shaped and inverted-L grounded strips around opposite and mirror corners of the square slot. In this antenna the impedance bandwidth and the axial ratio bandwidth (ARBW) are increased compared to the previous CPSSA structures. For the optimized antenna prototype, the measured 3 dB axial ratio bandwidth is 76 % (3 GHz 6.7 GHz) and the measured VSWR < 2 impedance bandwidth is as large as 108 % (3 GHz 10.1 GHz). Throughout this paper, the improvement process of the axial ratio (AR) and S11 properties are presented and discussed in detail. Index Terms ─ Axial ratio (AR), broadband, circularly polarized (CP), and square slot antenna.
Innovation Commercialisation and Anticipated Return: A Typology of Innovative SMEs

This study presents a typology of innovative small to medium size enterprises (SMEs) based on their anticipated returns to an investment in the commercialisation of an innovation. A large multi-country sample was surveyed in relation to the process of commercialisation. A discriminant analysis identified four distinct groups based on their anticipated returns from the innovation, and how systematic they were in their process of commercialisation. The findings suggest that differences exist between firms in relation to age, size, R&D intensity, preference for project financing, treatment of intellectual property and the novelty of the innovation. Younger firms were more likely to have higher anticipated innovation returns, but a less systematic commercialisation processes. Adolescent firms were more systematic and more optimistic over returns. However, as firms matured and increased in size their commercialisation process became more systematic, but their anticipated returns more subdued. Older firms were both unsystematic and anticipating low returns.
Effect of reactant and product melting on self-propagating reactions in multilayer foils

The evolution of self-propagating reactions along nanostructured multilayer foils is analyzed computationally. A simplified physical model is used that combines a two-dimensional diffusion equation for the atomic concentration with a quasi-one-dimensional form of the energy equation which accounts for the melting of the reactants and products. The model thus generalizes previous formulations which have ignored melting effects. The computations are used to predict the evolution of self-propagating fronts in Ni/Al foils, and analyze the dependence of these fronts on the foil parameters. In particular, the results indicate that melting substantially affects the properties of the unsteady reactions, and generally results in an appreciable reduction of the average front speed.
Influence of Pyrethroid Pesticide Formulation on Volatile Emissions from Cotton, Gossypium hirsutum L., Leaves

Abstract Volatile organic compounds (VOCs) are known to influence numerous ecological interactions among plants, insects, and natural enemies. There is little information on the direct or indirect effects of insecticide application on the production and emission of VOCs from plants. The goal of this study was to investigate the influence of two pyrethroid formulations on the emission of VOCs from cotton (Gossypium hirisutum L.). Emissions were sampled from cotton leaves treated with either a capsule suspension (CS) or an emulsifiable concentrate (EC) of lambda-cyhalothrin, or untreated controls 24 and 96 h after application of insecticides and analyzed by gas chromatography/mass spectrometry. Results indicated that application of either formulation of pyrethroid had no significant effect on the total emission of volatiles during any sampling period. Interestingly, untreated plants did exhibit significantly greater emissions of (E)-2-hexenal, β-farnesene, and (E,E)-4,8,12-trimethyl-1,3,7,11-tridecatetrae compared with plants treated with CS or EC formulations, seemingly due to significantly greater herbivore feeding activity on control plants compared with insecticide treated plants. The results of this study provide no indication that insecticide treatment influences VOC emission from plants; however, more controlled laboratory studies would likely provide more conclusive evidence.
The Role of Forest Resources in the Performance of Community Forest Enterprise in Mexico: Analytical Framework from Competitive Strategy

The objective was to make an analytical framework to support the strategy and performance of the community forest enterprise. To do this, we used theoretical analysis of the contributions of the main theories of the firm. The new institutional economics the role of institutions in common were analyzed. The institutions of governance and property rights of the communities determine the organizational structure and incentives. The possibilities of exchange of production and efficiency of community forest enterprise. The enterprise aligns multiple objectives in the governance of the commons, and the strategy. Community forest enterpriseÂ´s strategy is based on the use and control of forest resources and engages simultaneously in vertical integration in so far as they mature management skills and production in general. The analysis of the literature suggests that the performance of the community forest enterprise is positive because they are not only profitable domestic market, but also contribute to poverty reduction and environmental protection. However, it has implications as pressure on forest resources, over-regulation of natural resources; individuals do not achieve the social optimum, and therefore high-risk domestic market and loss of competitiveness internationally.
A comparison of modeled, remotely sensed, and measured snow water equivalent in the northern Great Plains

Various methods are available to measure or estimate the quantity of water present in a snowpack. Historically, the National Weather Service has relied on direct measurements taken at first order and cooperative weather stations. Because of the great spatial variability in snow cover density, point measurements are often of limited utility in identifying snow water equivalent (SWE) values over a given area or watershed. Increasingly, remote sensing techniques and physical models have been used to supplement point measurements of SWE and to improve areal estimates of snow water equivalent. This paper compares daily first‐order SWE observations from five stations across the northern Great Plains with those estimated from passive microwave remotely sensed data and from an energy and mass balance model (SNTHERM). A commonly utilized SWE algorithm is applied to Special Sensor Microwave/Imager (SSM/I) data across the northern Great Plains during the 1990s. Various filtering algorithms are applied to eliminate those situations in which the SSM/I SWE algorithms are known to be ineffectual. Airborne gamma estimates are also included in the comparison but are limited to only a few observations a year. Although the modeled SWE is generally in good agreement with the observed SWE, there is a tendency for the SNTHERM model to underestimate SWE, but it is typically within the margin of error of the observations. The microwave SWE algorithm apparently overestimates SWE significantly late in the season, compared to in situ observations, likely a result of snow grain growth during snow metamorphism.
SEQÜENCIACIÓ DE NOVA GENERACIÓ I SALUT EN EL SEGLE XXI

En la primera decada del segle XXI l'aparicio de les plataformes de sequenciacio massiva de nova generacio (NGS) ha produit una autentica revolucio en la sequenciacio del DNA. Aquesta tecnologia permet sequenciar en paral·lel milions de molecules de DNA a un preu molt inferior al de la sequenciacio tradicional i s'esta traslladant rapidament des del terreny de la investigacio basica a l'assistencia de capcalera al pacient. El seu extraordinari potencial en diferents especialitats mediques afectara practicament tots els aspectes de l'atencio clinica, ja que permetra fer rutinariament proves diagnostiques fins ara inconcebibles. En els propers deu anys probablement apareixeran noves plataformes de NGS per a us clinic, encara mes versatils, precises, assequibles i fins i tot portatils, que permetran plantejar la sequenciacio del genoma complet com a metode universal de diagnostic genetic. Tot aixo, unit a la millora del coneixement per predir com una variacio genetica afecta la susceptibilitat a la malaltia, l'evolucio d'aquesta o la resposta al tractament medic, sens dubte tindra un efecte transformador en l'us i protagonisme de la informacio genetica en la rutina clinica del segle XXI.
Interactions between AQM routers in the Internet

In this paper we present a study on mutual interactions between queue management algorithms implemented in Internet routers. The aim of this research was to detect possible issues connected with deployment of the active queue management (AQM) algorithms in the Internet. For that purpose, we simulated a net- work with four routers and checked its performance in different configurations of queue management algorithms. In particular, three basic configurations were considered: all routers in the network use the passive queue management, only one router in the network uses the active queue management (other routers use the passive queue management), all routers in the network use the active queue management. Six different AQM algorithms were used and tested in two congestion scenarios. In every case the performance of all bottleneck links was observed as well as the average performance of the whole network. In all the simulations, the average performance of the network, measured in terms of the queueing delay, was improved by when at least one router used an AQM algorithm. Moreover, in most cases the performance of every bottleneck link was also improved. These results give strong arguments for using AQM in the Internet. However, in some experiments we observed a performance degradation of particular bottleneck links when an AQM algorithm was used, indicating that some problems may indeed arise due to the mutual interactions of AQM routers.
Fractional fourier transform based monopulse radar for combating jamming interference

Monopulse radars are used to track a target that appears in the look direction beam width. The distortion produced when manmade high power interference (jamming). Jamming scenarios are achieved by introducing high power interference to the radar processor through the radar antenna main lobe (main lobe interference) or antenna side lobe (side lobe interference). This leads to errors in the target tracking angles that may cause target mistracking. A new monopulse radar structure is presented in this paper which offers a solution to this problem. This structure is based on the use of optimal Fractional Fourier Transform (FrFT) filtering. The proposed system configurations with the optimum FrFT filters is shown to reduce the simulated interfered signal and improve the signal to noise ratio (SNR) in the processors outputs in both processor using the proposed monopulse structure.
Development of a Scaffold Design Model in Inter-school Collaboration Environment: A Design-based Research

This study examines the development of a theoretical framework for scaffold design in an inter-school collaboration environment. The research question primarily deals with how to design scaffolds for an Inter-school Collaborative Learning (ICL). Design-based research methodology was used in this study. Literature review, questionnaire survey, field survey, and interviews were used during the course of research. Forty-seven secondary schools in 25 provinces in China were selected and participated in the study. This paper reports the first circle of design-based research. Through design-based research, a scaffold design model was developed and revised. Eight key types of scaffolding for ICL were identified. Elaborated strategies and tools were summarized for implementation of these scaffolds.
A further crystal structure refinement of gersdorffite

Thirteen gersdorffite (NiAsS) specimens were analyzed with electron microprobe, powder diffraction, and precession camera techniques. For each specimen, a sample with a well-developed cube form {lOO}was selected. Intensity data were collected from 27 reflections, which are mostly forbidden by cubic space group Pa3, with a single crystal diffractometer. X-ray powder diffraction data indicate two pyrite subgroup specimens, five ullmannite subgroup specimens, and six cobaltite subgroup specimens. A complete intensity data set was collected by single crystal diffractometer from three of these six cobaltite subgroup samples. Least-squares refinement shows different degrees of apparent As-S disorder with one sample significantly ordered (predominantly three twin-related domains) and the other two samples disordered (equal amounts of six twin-related domains). These three crystal structures are similar to those described for cobaltite. They are explained as a sextuplet of orthorhombic (Pca2t) interpenetrating twin-related domains about a 3 twin axis [111]. Although the chemical compositions of the three different pyrite-type crystal structures overlap, there is a tendency for the two pyrite subgroup (true As-S disorder at the atomic level, Pa3) specimens to contain more As, and a tendency for the six cobaltite subgroup (true As-S order at the atomic level, Pca2t) specimens to contain more Co and Fe than the five ullmannite subgroup (true As-S order at the atomic level, P2t3) specimens. These three crystal structures are probably temperature dependent with P2t3 the low form, Pca21 the intermediate (metastable? ) form, and Pa3 the high form.
Liveborn baby by ICSI of micro-TESE derived cryopreserved-thawed sperm of non-mosaic Klinefelter syndrome father

Klinefelter syndrome (Ks) is the most common sex chromosome abnormality in azoospermic males and its prevalence changes in different countries. Until recently Ks patients were accepted as sterile however with the impact of microsurgical testicular sperm extraction (Micro-tEsE) and good freezing modalities healthy pregnancies and live born babies achieved. Klinefelter syndrome males have a wide variety of semen findings from severe azoospermia to nearly normal sperm findings but mostly in the range of azoospermia and severe oligoasthenoteratospermia. For some social and economical reasons, patients decide to have Micro-tEsE operation first as in this case. the number of publications and case reports has been increasing and implantation rates and clinical outcomes are comparable with the fresh Micro-tEsE derived sperm used cases. the use of cryopreserved-thawed sperms of Ks patients for intracytoplasmic sperm injection (IcsI) could be
Finite Element Analysis of an Exterior Rotor Permanent Magnet Brushless DC Motor for Torque Improvement by a Novel Peak Torque Excitation Technique

A novel excitation technique has been proposed for Exterior Rotor Permanent Magnet Brushless Direct Current (ERPMBLDC) motor to improve its torque by Peak Torque Excitation (PTE) technique. Three phase windings of the stator of ERPMBLDC motor are not only excited according to the rotor position but also at phase angles corresponding to peak torque. Phase angles for maximum torque and torque were identified through simulation of ERPMBLDC motor by using Finite Element Method Magnetic 4.2(FEMM4.2) software package. A prototype model was developed which shows good agreement with simulation results. In the analysis of the electrical machines, the problems are almost always nonlinear due to the presence of ferromagnetic materials. Good designs will typically operate at or near the saturation point. The magnetic permeability or reluctivity is nonhomogenous and will be a function of the local magnetic fields which are unknown at the start of the problem. The most popular method of dealing with nonlinear problems in magnetic is the Newton-Raphson method. Newton-Raphson procedure is applied to linearize the nonlinear system equations(7). The nonlinear magnetic field finite element analysis can provide accurate results . The finite element method is used as it is quicker and easier for the designer. It offers well-known topologies of rotor, stator, winding and methods of analysis. The finite element method (FEM) has proved to be particularly flexible, reliable and effective in the analysis and synthesis of power-frequency electromagnetic and electromechanical devices . Even in the hands of non specialists, modern FEM packages are user friendly and allow for calculating the electromagnetic field distribution and integral parameters without detailed knowledge of applied mathematics. The FEM can analyze PM circuits of any shape and material. There is no need to calculate reluctances, leakage factors or the operating point on the recoil line. The PM demagnetization curve is input into the finite element program which can calculate the variation of the magnetic flux density throughout the PM system. An important advantage of finite element analysis over the analytical approach to PM motors is the inherent ability to calculate accurately armature reaction effects, inductances and the electromagnetic torque variation with rotor position (cogging torque) (2)-(3), (8) and (13). In electrical machine problems four methods of calculating forces or torques are used: the Maxwell stress tensor, the co-
Title Berberine Suppresses Cyclin D1 Expression through Proteasomal Degradation in Human Hepatoma Cells

The aim of this study is to explore the underlying mechanism on berberine-induced Cyclin D1 degradation in human hepatic carcinoma. We observed that berberine could suppress both in vitro and in vivo expression of Cyclin D1 in hepatoma cells. Berberine exhibits doseand time-dependent inhibition on Cyclin D1 expression in human hepatoma cell HepG2. Berberine increases the phosphorylation of Cyclin D1 at Thr286 site and potentiates Cyclin D1 nuclear export to cytoplasm for proteasomal degradation. In addition, berberine recruits the Skp, Cullin, F-box containing complex-β-Transducin Repeat Containing Protein (SCFβ-TrCP) complex to facilitate Cyclin D1 ubiquitin-proteasome dependent proteolysis. Knockdown of β-TrCP blocks Cyclin D1 turnover induced by berberine; blocking the protein degradation induced by berberine in HepG2 cells increases tumor cell resistance to berberine. Our results shed light on berberine′s potential as an anti-tumor agent for clinical cancer therapy.
On nitely based pseudovarieties of the forms V ∗ D and V ∗ D n 1

Let Dn be the pseudovariety of all nite semigroups in which products of length n are right zeros and let D= ⋃ n≥1Dn. It is shown in this paper that, if V is a pseudovariety of semigroups whose global gV is nitely based, then V ∗Dn (n≥ 1) and V ∗D are also nitely based. Moreover, if V is itself nitely based and contains the aperiodic ve-element Brandt semigroup, then gV is also nitely based. As a further application, it is proved that the nite basis properties for gV, V ∗D and V ∗Dn (n≥ 1) are all equivalent for an arbitrary non-group monoidal pseudovariety V: c © 2000 Elsevier Science B.V. All rights reserved. MSC: 20M07; 20M05; 20M50
Physics of Pair Producing Gaps in Black Hole Magnetospheres. II. General Relativity

This is the second paper in a series where we examine the physics of pair producing gaps in low-luminosity accreting supermassive black hole systems. In this paper, we carry out time-dependent self-consistent fully general relativistic 1D particle-in-cell simulations of the gap, including full inverse Compton scattering and photon tracking. Similar to the previous paper, we find a highly time-dependent solution where a macroscopic vacuum gap can open quasiperiodically, producing bursts of pairs and high energy radiation. We present the light curve, particle spectrum, and photon spectrum from this process. Using an empirical scaling relation, we rescale the parameters to the inferred values at the base of the jet in M87, and find that the observed TeV flares could potentially be explained by this model under certain parameter assumptions.