Miracle-dz/UniFAR-FTUs huggingface dataset:
Pedagogical Factors Affecting Integration of Computers in Mathematics Instruction in Secondary Schools in Kenya

The paper reports findings of a study which sought to examine the pedagogical factors that affect the integration of computers in mathematics instruction as perceived by teachers in secondary schools in Kenya. This study was based on the Technology Acceptance Model (TAM). A descriptive survey design was used for this study. Stratified and simple random sampling techniques were used to select a sample of 200 teachers that was drawn independently and randomly from the stratum of secondary schools. Questionnaires, interview and observation schedules were used to collect data from respondents. Data was analyzed using descriptive statistics frequencies and percentages and inferential statistics including one way analysis of variance and regression analysis. The results indicate that mathematics teachers’ use of computer technology is significantly related to pedagogical factors such as knowledge and skills in computer, perceived usefulness, access to hardware and software and technical support and pedagogical routine practice. The study provides a basis upon which recommendations on appropriate remedies can be formulated to enhance the integration of computers in mathematics instruction by teachers. This also provides a guideline for the selection of sound instructional approaches in mathematics instruction in secondary schools. Keywords: ICT pedagogy, instructional software, mathematics classroom
Qatar's Educational Reform: Critical Issues Facing Principals

Launched in 2004, Qatar’s massive educational reform, Education for a New Era, has introduced numerous changes to the K-12 educational system forcing school leaders to face challenges and issues in their role of leading and managing the school community. This chapter reports the results of a qualitative research study that examines the critical issues K-12 principals face as they implement educational reform. Using semi-structured interviews, the voices of 20 principals are presented centering on the critical issues that have evolved during the reform and the skills and leadership styles necessary to address these issues that have shaped the Qatari educational reform. Discussion and recommendations are provided to assist educational leaders in similar contexts.
The Gap between the Beginning and the End of Algebraic Thinking Transition Period

Algebraic thinking is an important element in mathematics thinking and reasoning. All students experience a transition to algebraic thinking. It happens from elementary school grade V until junior high school grade VII. This study aims to describe the differences in algebraic thinking ability from the beginning of transition period, elementary school grade V, until the end of the transition period, junior high school grade VII. This research was a cross-sectional research using mixed method approach. The results showed that students' algebraic thinking ability at the beginning of the transition period and at the end of the transition period was in moderate criteria. The average score in algebraic thinking test at the end of the transition period, junior high school grade VII, was higher than the students in junior high school grade V, but the algebraic thinking ability of students in elementary school grade V did not have much different with the students of junior high school grade VII, that was in the moderate criteria.
Dynamic Effects of an Economic Partnership Agreement: Implications for Senegal

In this paper, I use a dynamic recursive computable general equilibrium to evaluate, for the economy of Senegal, the dynamic effects of an economic Partnership Agreement between West African countries and the European Union. In the simulation, the liberalization scheme is designed in a way similar to the interim agreement signed by Cote d’Ivoire and Ghana. The effects described are the shifts from the baseline numbers. I found that the production of agricultural goods will decrease, affecting employment negatively, particularly in unskilled labor, since this sector is very labor intensive. In fact, employment drops at around 0.2 percent a year, during the simulation period (2012-2030). GDP grows on average by 1.9 percent a year. The effects of the economic partnership agreement closely mirror the results of a free trade agreement between Senegal and the European Union, implying that a customs union between West African countries is not necessary to reap of the benefit of the former.
LENSING PROPERTIES OF THE EINASTO PROFILE IN TERMS OF THE MEIJER G FUNCTION

In N-body simulations of cold dark matter, it has been found that three-parameter models, particularly the Einasto profile, yield better fits to a wide range of dark matter haloes than two parameter models like the Navarro-Frenk-White profile. Recently, the analytical properties of the Einasto profile has been studied, allowing closed expressions for its surface mass density and lensing properties in terms of the Fox H and Meijer G functions, using a Mellin transform formalism. These expressions are valid for all values of the Einasto index in terms of the Fox H function, and valid for integer and half-integer values of Einasto index in terms of the Meijer G function. In this paper, we derive expressions for lensing properties of the Einasto profile for all rational values of the Einasto index in terms of the Meijer G function. Equivalency between these expressions and other recent results is also discussed
Effect of the Level Density Parameter Ratio on the Cross Sections of Fission of Uranium Isotopes

Nuclear level density is a fission characteristics for each core. Level density parameter ratio af/an plays an important role in the statistical calculations of the fission, investigation of heavy ion collisions and calculation of the reaction cross sections. In this study, the effects of the different level density ratio on the fission reaction cross section for uranium isotopes were investigated. Calculations were carried out using the Monte Carlo simulation codes ALICE/ASH and TALYS 1.6. The calculated results were compared with the experimental reaction cross sections from literature.
High-Temporal Resolution Polarimetric X-Band Doppler Radar Observations of the 20 May 2013 Moore, Oklahoma, Tornado

Abstract On 20 May 2013, the cities of Newcastle, Oklahoma City, and Moore, Oklahoma, were impacted by a long-track violent tornado that was rated as an EF5 on the enhanced Fujita scale by the National Weather Service. Despite a relatively sustained long track, damage surveys revealed a number of small-scale damage indicators that hinted at storm-scale processes that occurred over short time periods. The University of Oklahoma (OU) Advanced Radar Research Center’s PX-1000 transportable, polarimetric, X-band weather radar was operating in a single-elevation PPI scanning strategy at the OU Westheimer airport throughout the duration of the tornado, collecting high spatial and temporal resolution polarimetric data every 20 s at ranges as close as 10 km and heights below 500 m AGL. This dataset contains the only known polarimetric radar observations of the Moore tornado at such high temporal resolution, providing the opportunity to analyze and study finescale phenomena occurring on rapid time scales. Analysis .
Multinomial Regression with Elastic Net Penalty and Its Grouping Effect in Gene Selection

For the multiclass classification problem of microarray data, a new optimization model named multinomial regression with the elastic net penalty was proposed in this paper. By combining the multinomial likeliyhood loss and the multiclass elastic net penalty, the optimization model was constructed, which was proved to encourage a grouping effect in gene selection for multiclass classification.
Johansen's contribution to CGE modelling: originator and guiding light for 50 years

Fifty years ago the Norwegian economist, Leif Johansen, gave us what is now recognised as the first CGE model. While Johansen was first, he is not the father of the whole field. CGE modelling in different styles sprang largely independently from several sources. This paper describes how Johansen's style of CGE modelling took root in Australia in the 1970s and has from there spread to the rest of the world. Today, thousands of economists from nearly every country are undertaking Johansen-style CGE modelling to elucidate policy questions in trade, taxation, environment, labour markets, immigration, income distribution, technology, resources, micro-economic reform and macro stabilization.
New insights into the Be/X-ray binary system MXB 0656-072

The X-ray transient MXB 0656-072 is a poorly studied member of high-mass X-ray binaries. Based on the transient nature of the X-ray emission, the detection of pulsations, and the early-type companion, it has been classified as a Be X-ray binary (Be/XRB). However, the flaring activity covering a large fraction of a giant outburst is somehow peculiar. Our goal is to investigate the multiwavelength variability of the high-mass X-ray binary MXB 0656-072. We carried out optical spectroscopy and analysed all RXTE archive data, performing a detailed X-ray-colour, spectral, and timing analysis of both normal (type-I) and giant (type-II) outbursts from MXB 0656-072 This is the first detailed analysis of the optical counterpart in the classification region (4000-5000 A). From the strength and ratio of the elements and ions, we derive an O9.5Ve spectral type, in agreement with previous classification. This confirms its Be nature. The characterisation of the Be/XRB system relies on Balmer lines in emission in the optical spectra, long-term X-ray variability, and the orbital period vs. spin period and EW(H\alpha) relation. The peculiar feature that distinguishes the type-II outburst is flaring activity, which occurs during the whole outburst peak, before a smoother decay. We interpret it in terms of magneto-hydrodynamic instability. Colour and spectral analysis reveal a hardening of the spectrum as the flux increases. We explored the aperiodic X-ray variability of the system for the first time, finding a correlation of the central frequency and rms of the main timing component with luminosity, which extends up to a "saturation" flux of 1E-8 erg/cm^2/s. A correlation between timing and spectral parameters was also found, pointing to an interconnection between the two physical regions responsible for both phenomenologies.
Graph Transformation as Graph Reduction FUnCAL: A Functional Reformulation of Graph-Transformation Language UnCAL

A large amount of graph-structured data are widely used, including biological database, XML with IDREFs, WWW, and UML diagrams in software engineering. UnCAL, proposed by Buneman et al. from the database community, is a language designed for graph transformations, i.e., extracting a subpart of a graph data and converting it to a suitable form, which often also has a graph structure. A distinguished feature of UnCAL is its semantics that respects bisimulation on graphs; this enables us to reason about UnCAL graph transformations as recursive functions, which is useful for verification as well as optimization. However, despite of this similarity of UnCAL to functional languages, there is still a gap to apply the program-manipulation techniques studied in the programming language literature directly to UnCAL programs, due to some special features in UnCAL, especially markers. In this paper, first, we give a translation from UnCAL programs to functional ones by emulating markers by tuples and
Fuzzy Filter-Based FDD Design for Non-Gaussian Stochastic Distribution Processes Using T-S Fuzzy Modeling

This paper studies the fuzzy modeling problem and the fault detection and diagnosis (FDD) algorithm for non-Gaussian stochastic distribution systems based on the nonlinear fuzzy filter design. Following spline function approximation for output probability density functions (PDFs), the T-S fuzzy model is built as a nonlinear identifier to describe the dynamic relationship between the control input and the weight vector. By combining the designed filter and the threshold value, the fault in T-S weight model can be detected and the stability of error system can also be guaranteed. Moreover, the novel adaptive fuzzy filter based on stochastic distribution function is designed to estimate the size of system fault. Finally, the simulation results can well verify the effectiveness of the proposed algorithm for the constant fault and the time-varying fault, respectively.
A Person-Organisation Fit Study of College Work Culture and Its Impact on Behavioural Intentions of Teachers

The role of work culture in educational institutions in determining behavioural characteristics of teachers namely, job satisfaction, intent to remain and willingness to recommend the organisation is established though this descriptive study. The existence of transparency and solidarity in the organisations proves to be the significant work culture factors in determining the teacher's behavioural responses. A unique instrument College Work Culture Profile (CWCP) to measure the work culture existing in the Indian higher educational institutions is developed and its formative reliability and validity is established. The instrument will be useful to measure the work culture fit between the educational institutions and its teacher's values, using Person-Organisation fit model.
Theft Detection and Controlling System of a Vehicle Using GSM

: At present days with increase in number of vehicles, vehicle thefts are also increasing in large numbers it is a challenging task for the owners to protect the vehicles, to overcome the theft of the vehicles an anti theft system is designed which is easier, useful and cost effective to protect the vehicles. This system uses GSM system, a Buzzer and solenoid valve to cutoff the fuel supply for the engine from the carburetor. If anyone starts the ignition of the engine the microcontroller sends the signal to send the SMS to the owner, If theft detected by the owner then he simply sends the SMS to stop the vehicle from his mobile then ignition, fuel supply system gets off and buzzer gives a loud sound.
Time-series photometric spot modeling. IV. The multi-periodic K5Ve binary V833 Tauri

We analysed all the existing photometric observations of V833 Tau and found long-term variability on time scales of ≈ 70 years, 6.5 years and 2.4 years. Using V and I C -band data from 1990-2000, we obtained starspot surface distributions from 20 suitable light curves. We found that the spot-area changes generally follow the long-term light variations. Spot temperatures are determined for each of the datasets and an average value of $1230 {\rm K}\pm270$ K relative to the photosphere is found. This value agrees with previous results from TiO modeling ($1330 {\rm K}\pm110$ K). Small scale spot temperature and area changes are recovered during 1997-1999, that we explain with a variable spot/faculae ratio. A powerful flare in $UBV(RI)_{\rm C}$ was observed in 1993 November. A 10 000 K fit yielded a total emitted flare energy of more than 10 34 ergs from an area of about 1.3% of the stellar surface, 60% of it in the $V(RI)_{\rm C}$ bands. The flare characteristics are compared to another, 100-times smaller flare observed earlier in 1983.
The baroclinic instability in the context of layered accretion - Self-sustained vortices and their magnetic stability in local compressible unstratified models of protoplanetary disks

Context. Turbulence and angular momentum transport in accretion disks remains a topic of debate. With the realization that dead zones are robust features of protoplanetary disks, the search for hydrodynamical sources of turbulence continues. A possible source is the baroclinic instability (BI), which has been shown to exist in unmagnetized non-barotropic disks. Aims. We aim to verify the existence of the baroclinic instability in 3D magnetized disks, as well as its interplay with other instabilities, namely the magneto-rotational instability (MRI) and the magneto-elliptical instability. Methods. We performed local simulations of non-isothermal accretion disks with the PENCIL CODE. The entropy gradient that generates the baroclinic instability is linearized and included in the momentum and energy equations in the shearing box approximation. The model is compressible, so excitation of spiral density waves is allowed and angular momentum transport can be measured. Results. We find that the vortices generated and sustained by the baroclinic instability in the purely hydrodynamical regime do not survive when magnetic fields are included. The MRI by far supersedes the BI in growth rate and strength at saturation. The resulting turbulence is virtually identical to an MRI-only scenario. We measured the intrinsic vorticity profile of the vortex, finding little radial variation in the vortex core. Nevertheless, the core is disrupted by an MHD instability, which we identify with the magneto-elliptic instability. This instability has nearly the same range of unstable wavelengths as the MRI, but has higher growth rates. In fact, we identify the MRI as a limiting case of the magneto-elliptic instability, when the vortex aspect ratio tends to infinity (pure shear flow). We isolated its effect on the vortex, finding that a strong but unstable vertical magnetic field leads to channel flows inside the vortex, which stretch it apart. When the field is decreased or resistivity is used, we find that the vortex survives until the MRI develops in the box. The vortex is then destroyed by the strain of the surrounding turbulence. Constant azimuthal fields and zero net flux fields also lead to vortex destruction. Resistivity quenches both instabilities when the magnetic Reynolds number of the longest vertical wavelength of the box is near unity. Conclusions. We conclude that vortex excitation and self-sustenance by the baroclinic instability in protoplanetary disks is viable only in low ionization, i.e., the dead zone. Our results are thus in accordance with the layered accretion paradigm. A baroclinicly unstable dead zone should be characterized by the presence of large-scale vortices whose cores are elliptically unstable, yet sustained by the baroclinic feedback. Since magnetic fields destroy the vortices and the MRI outweighs the BI, the active layers are unmodified.
COBE DMR-normalized Dark Energy Cosmogony

Likelihood analyses of the COBE Differential Microwave Radiometer (DMR) sky maps are used to determine the normalization of the inverse-power-law potential scalar-field dark energy model. Predictions of the DMR-normalized model are compared with various observations to constrain the allowed range of model parameters. Although the derived constraints are restrictive, evolving dark energy density scalar-field models remains an observationally viable alternative to the constant cosmological constant model.
High charge low emittance rf gun for superkekb

We are developing a new RF gun for SuperKEKB. We are upgrading KEKB to SuperKEKB now. High charge low emittance electron and positron beams are required for SuperKEKB. We will generate 7.0 GeV electron beam at 5 nC 20 mm-mrad by J-linac. In this linac, a photo cathode S-band RF gun will be used as the electron beam source. For this reason, we are developing an advanced RF gun. Now, we are testing a Disk and Washer (DAW) type RF gun. Its photo cathode material is LaB6 or Ir5Ce. Normally, LaB6 or Ir5Ce are used as a thermionic cathode,
Assessing lending market concentration in Bulgaria: the application of a new measure of concentration

This paper has a twofold interest. First, we construct new concentration measures that alleviate some shortcomings of the most frequently applied indexes, which are Herfindahl-Hirshman and Entropy measures. They also provide additional information about the way in which the loan portfolio is concentrated according to sectoral funding size. Second, we aim to find the factors that explain the banking lending concentration in Bulgaria. Applying a dynamic-panel model, it is shown that liquidity, loan portfolio level and the level of money in circulation influence the way in which the Bulgarian banks lend to different economic sectors. It should be mentioned that only liquidity level influences the loan concentration, if it is measured with Herfindahl-Hirshman and Entropy indexes, which suggest that these concentration measures perform worse than our global concentration index
Scaling of mixed convection in aircraft cabins

For the present study of turbulent mixed convection a generic convection cell has been developed. It was designed to work with air as working fluid under high pressure as well as ambient pressure conditions. Based on Particle Image Velocimetry (PIV) and temperature measurements a concept which allows to scale the spatial dimension at turbulent mixed convection by increasing the fluid pressure and adjusting the inflow velocity has been studied. Further analyse the spatial structure of the kinetic energy distribution in mixed convection Proper Orthogonal Decomposition (POD) calculations of the velocity fields have been performed. Results of these investigations are presented.
Conformance Testing and Analysis of Synchrophasor Communication Message Structures and Formats for Wide Area Measurement Systems in Smart Grids

The renewed quest for situational awareness in power systems has brought about the use of digital signal processing of power system measurements, and the transmission of such data to control centres via communication networks. At the control centres, power system stability algorithms are executed to provide monitoring, protection, and control in order to prevent blackouts. This can be achieved by upgrading the existing Supervisory Control and Data Acquisition (SCADA) systems through the deployment of newly proposed power system synchrophasor-based applications for Wide Area Monitoring, Protection, and Control (WAMPAC). However, this can only be done when there is a complete understanding of the methods and technologies associated with the communication network, message structure, and formats required. This paper presents an analysis of the IEEE C37.118 synchrophasor message framework, message formats, and data communication of synchrophasor measurements from Phasor Measurement Units (PMUs) for WAMPAC schemes in smart grids. A newly designed lab-scale testbed is implemented and used in the practical experimentation relating to this paper. Synchrophasor measurements from the PMUs are captured using a network protocol analyzer software-Wireshark, and the compliance of the synchrophasor message structures and formats captured was compared to the specifications defined in the IEEE C37.118 synchrophasor standard.
AutoBiVision - A Novel Vision-Based Bicycle Warning System

This article presents the concept of a novel visionbased bicycle warning system (AutoBiVision). AutoBiVision system warns the driver of the approaching bicycles without offering redundant or disturbing information, which means when the driver is focusing on one specific area, the system will focus on the other areas that the driver is not paying attention to. To this end both the driver and cyclists require to be monitored, which means two camera systems are needed: The inner camera system captures the interior of the vehicle while the outer camera system captures the bicycle lane as well as the cyclists. With the purpose of intelligently detecting and tracking the bicyclist in wider ranges, two rotatable cameras, which are components of the outer camera system, are mounted on the top of the left and right back mirrors of the vehicle, respectively. The angle control of the rotatable cameras depends on the results of bicycle tracking and bicycle lane detection. In this contribution, the main structure of the system and the initial results of a series of novel methods of bicycle lane detection, are presented. A patent is pending.