Miracle-dz/UniFAR-FTUs huggingface dataset:
Interregional Migration and Thresholds: Evidence from Spain

Abstract We analyse the effects of labour market factors on interregional migration in Spain for the period 1988–2010. A basic theoretical framework is developed, suggesting that the effect of labour market variables on migration varies, depending on a certain threshold. The model implications are tested using a new approach based on the presence of endogenous thresholds. We show that Spanish interregional migration can be explained by labour market variables when the labour market conditions at the source region are unfavourable relative to those of the host region. We test the results for several migrant characteristics, such as citizenship, the age range, and return migration. Migration inter-régionale et seuils - résultats de la recherche en Espagne
The Dark Matter Annihilation Signal from Dwarf Galaxies and Subhalos

Dark Matter annihilation holds great potential for directly probing the clumpiness of the Galactic halo that is one of the key predictions of the Cold Dark Matter paradigm of hierarchical structure formation. Here we review the 𝛾-ray signal arising from dark matter annihilation in the centers of Galactic subhalos. We consider both known Galactic dwarf satellite galaxies and dark clumps without a stellar component as potential sources. Utilizing the Via Lactea II numerical simulation, we estimate fluxes for 18 Galactic dwarf spheroidals with published central densities. The most promising source is Segue 1, followed by Ursa Major II, Ursa Minor, Draco, and Carina. We show that if any of the known Galactic satellites can be detected, then at least ten times more subhalos should be visible, with a significant fraction of them being dark clumps.
Resonant modes of two-dimensional photonic bandgap cavities determined by the finite-element method and by use of the anisotropic perfectly matched layer boundary condition

The finite-element approach to the eigenmode analysis of a photonic bandgap cavity by use of an anisotropic perfectly matched layer absorbing boundary is presented. This method rigorously calculates the resonant frequency, the field pattern, and the quality factor of the resonant mode of a finite-sized cavity in free space. The validity of the approach is examined through its application to two-dimensional photonic bandgap cavities. Analyses of numerical error for the resonant frequencies and the quality factor of the cavities demonstrate the accuracy and reliability of our approach, which used nonuniform grids, higher-order elements, and the perfectly matched layer. Far-field patterns of the resonant modes were obtained by simple transformation. Because the perfectly matched layer can represent the real boundary condition well, cavities of any size and shape can be analyzed with the desired accuracy. © 1998 Optical Society of America [S0740-3224(98)00908-4] OCIS codes: 140.3410, 230.3670, 000.4430, 230.5750, 260.2110.
Evaluation of rough Brucella strains as vaccines for brucellosis and pseudorabies in swine

vii CHAPTER 1: INTRODUCTION. 1 Overview of the Research Problem . 1 Research Objectives. 2 CHAPTER 2: REVIEW OF THE LITERATURE . 3 Brucella Species. 3 Brucella suis. 5 Swine Brucellosis. 5 Vaccine Strains . 7 Pseudorabies Virus. 12 Pseudorabies Virus Glycoproteins. 14 Feral Swine . 16 CHAPTER 3: MATERIALS AND METHODS . 18 Brucella Strains. 18 Animals and Breeding. 18 Genetic Manipulation of Vaccine Strains . 19 Vaccine Routes. 20 Serum Collection . 21 Serological Testing. 21 Necropsy . 22 Bacteriological Analysis. 22 Experimental Design. 23 CHAPTER 4: RESULTS. 26 Transformation of VTRS1 and RB51 with pBBgroE ssLgD . 26 Serological Responses in Swine orally vaccinated with VTRS1 and RB51 . 26 Colonization of VTRS1 . 28 Colonization of VTRS1+gD and RB51+gD. 28 VTRS1+gD and RB51+gD Pathogenesis in Pregnant Swine. 34 Efficacy of Oral VTRS1 and RB51 Vaccination. 34 Evaluation of Oral and Subcutaneous Vaccination with VTRS1+gD and RB51+gD. 39 CHAPTER 5: DISCUSSION. 42 CHAPTER 6: SUMMARY. 49
Sludge oomph: harnessing the power of sediment microbiota

In recent years, new methods of clean and environmentally friendly energy production have been the focus of intense research efforts. Microbial fuel cells are devices that utilize naturally occurring microorganisms that feed on organic matter while producing electrical energy. The natural habitats of bacteria thriving in microbial fuel cells are usually marine and freshwater sediments. In order to develop and improve applications of the vast metabolic repertoire of these microorganisms it is important to identify the relevant proteins and their functional mechanisms. Several sediment bacteria have been the focus of research efforts such as members of the genera Desulfuromonas, Geobacter, and Shewanella. The genomes of these organisms have the common characteristic of containing numerous genes for multiheme cytochromes. For Geobacter and Shewanella many of these are known to be essential for the extracellular respiration that is at the core of electricity production in microbial fuel cells. In this review, the current knowledge on these unusual redox chains and future perspectives on their understanding towards improved extracellular electrical contact are presented.
EMISSIONS OF CO2 AND CH4 IN ASMARI GAS COMPRESSOR STATION IN NATIONAL IRANIAN SOUTH OIL COMPANY USING EMISSION FACTOR

Introduction: Iran is located in the seventh rank in terms of CO2 emissions resulting from the combustion of fuel in the world. Asmari gas compressor station due to the several sources of contaminants are causing the release of large amounts of CO2 and CH4, which will cause damage to the environment and a change in the weather conditions. This study was aimed to assess the extent of the greenhouse emissions (CO2 and CH4) in a selected Asmari gas compressor station at National Iranian South Oil Company. Materials and methods: In this study, the emission factor method, provided by various organizations, was used for determining emissions of CO2 and CH4 from sources. Results: According to the results, the total amount of CO2 emissions in selected units is equal to 1825.533 tons/day and the total emissions of CH4, is equal to 2.473 tons/day. Among the sources of pollutants in the fixed combustion sources, turbines have the highest amount of CO2 emissions, and among the exit gas source (repair and maintenance activities), the highest emissions of CH4 belongs to the compressors. Conclusions: The amount of CO2 emissions from indirect sources (electrical equipment) from natural gas are more than fuel oils for burning, and CH4 gas from volatile sources in the gas compressors have the highest emissions compared to other sources.
Bridgeness: a local index on edge significance in maintaining global connectivity

Edges in a network can be divided into two kinds according to their different roles: some enhance the locality like the ones inside a cluster while others contribute to the global connectivity like the ones connecting two clusters. A recent study by Onnela et al uncovered the weak ties effects in mobile communication. In this paper, we provide complementary results on document networks, that is, the edges connecting less similar nodes in content are more significant in maintaining the global connectivity. We propose an index called bridgeness to quantify the edge significance in maintaining connectivity, which only depends on local information of the network topology. We compare the bridgeness with content similarity and some other structural indices according to an edge percolation process. Experimental results on document networks show that the bridgeness outperforms content similarity in characterizing the edge significance. Furthermore, extensive numerical results on disparate networks indicate that the bridgeness is also better than some well-known indices on edge significance, including the Jaccard coefficient, degree product and betweenness centrality.
ERRORS OF STUDENTS LEARNING WITH REACT STRATEGY IN SOLVING THE PROBLEMS OF MATHEMATICAL REPRESENTATION ABILITY

The purpose of this study was to investigate the errors experienced by students learning with REACT strategy and traditional learning in solving problems of mathematical representation ability. This study used quasi experimental pattern with static-group comparison design. The subjects of this study were 47 eighth grade students of junior high school in Bandung consisting of two samples. The instrument used was a test to measure students' mathematical representation ability. The reliability coefficient about the mathematical representation ability was 0.56. The most prominent errors of mathematical representation ability of students learning with REACT strategy and traditional learning, was on indicator that solving problem involving arithmetic symbols (symbolic representation). In addition, errors were also experienced by many students with traditional learning on the indicator of making the image of a real world situation to clarify the problem and facilitate its completion (visual representation). DOI : http://dx.doi. org/10.22342/jme.9. 1.4301. 121-128
Top Manager Background Characteristics, Family Control and Corporate Social Responsibility (CSR) Performance

This study explores the relationship between top manager characteristics and company corporate social responsibility (CSR) performance. Using integral CSR, corporate governance, corporate commitment, social participation and the environmental protection index, we found that the academic degree held by a top manager is the main factor that influences company CSR performance, especially events related to environmental protection. The positive association between top managersâ€™ working experience and CSR is significant only for the environmental protection index. Furthermore, we find that the family-control type of company will influence the associations between top manager characteristics and CSR performance. This study considers the importance of the top managersâ€™ cognitions and reactions for CSR events in CSR performance, while most of the prior studies only consider the influence of managersâ€™ agency problem. Moreover, our results provide evidence to demonstrate that management capability may complement strong governance for family-controlled companies. This study offers deeper insights for capital markets to understand the influence of managersâ€™ background characteristics on company CSR performance. In addition, it provides evidence to recommend a further consideration for family-controlled type on enhancing the CSR of companies.
STABILITY PARAMETERS FOR TILLERS, GRAIN WEIGHT AND YIELD OF WHEAT CULTIVARS IN NORTH-WEST OF PAKISTAN

Thirteen spring wheat cultivars were evaluated for 2-years at 5 diverse locations of NWFP for stability analysis of tillers per m 2 , 1000-grain weight and grain yield. Combined analysis of variance revealed significant differences among locations, years and location×year interactions for these wheat traits. Cultivar×year interaction was highly significant (p=0.01) for 1000-grain weight and grain yield, while cultivar×location interaction was highly significant only for productive tillers per m 2 . However, cultivar×location×year interaction existed for all traits (p=0.01). Maximum number of productive tillers of 410 per m 2 were produced by wheat cultivar Dirk followed by Fakhre Sarhad (396 tillers per m 2 ) and Nowshera-96 (395 tillers per m 2 ). Cultivars Dirk and Nowshera-96 excelled in 1000-grain weight (43 g). Maximum grain yield of 4259 kg ha -1 was produced by cultivar Nowshera-96 followed by Fakhre Sarhad (4183 kg ha -1 ). Wide range of stability statistics was observed among cultivars for all the three parameters. Though none of the wheat cultivar had b- value equal to unity for tillers m -2 , 1000-grain weight or grain yield, but Pirsabak-85, Bakhtawar-92, Nowshera-96 and Fakhre Sarhad were the stable cultivars on the basis of overall mean yields and stability parameters viz., regression coefficients and minimum deviations from regression.
A Survey of MBA Spreadsheet Users by

We developed an internet-based questionnaire on spreadsheet use, and we administered the questionnaire to a large number of users to document how spreadsheets are currently being developed and used in the business world. In this paper, we discuss the results drawn from a large sample of MBA graduates. These results describe current spreadsheet use in organizations, largely confirming the gap that exists between actual practice and best practice. Moreover, our results indicate that this gap occurs in two areas: it appears not only in the skills of individual users but also in the policies of large organizations.
On the return-volatility relationship in the Bitcoin market around the price crash of 2013

Abstract The authors examine the relation between price returns and volatility changes in the Bitcoin market using a daily database denominated in US dollar. The results for the entire period provide no evidence of an asymmetric return-volatility relation in the Bitcoin market. The authors test if there is a difference in the return-volatility relation before and after the price crash of 2013 and show a significant inverse relation between past shocks and volatility before the crash and no significant relation after. This finding shows that, prior to the price crash of December 2013, positive shocks increased the conditional volatility more than negative shocks. This inverted asymmetric reaction of Bitcoin to positive and negative shocks is contrary to what one observes in equities. As leverage effect and volatility feedback do not adequately explain this reaction, the authors propose the safe-haven effect (Baur, Asymmetric volatility in the gold market, 2012). They highlight the benefits of adding Bitcoin to a US equity portfolio, especially in the pre-crash period. Robustness analyses show, among others, a negative relation between the US implied volatility index (VIX) and Bitcoin volatility. Those additional analyses further support the findings and provide useful information for economic actors who are interested in adding Bitcoin to their equity portfolios or are curious about the capabilities of Bitcoin as a financial asset.
An alternatively efficient method (DBEM) for simulating the electrostatic field and levitating force of a MEMS combdrive

For MEMS combdrive design, the reduction of levitating force due to electrostatic fields is very important, and an accurate electrostatic analysis is essential and indispensable. For diverse MEMS combdrive designs, the boundary element method (BEM) has become a better method than the domain-type finite element method (FEM) because the BEM can provide a complete solution in terms of boundary values only, with substantial saving in modeling effort. Since dual BEM (DBEM) has some advantages over conventional BEM for a singularity, the DBEM was used to simulate the fringing of field around the edges of the fixed fingers and movable fingers of MEMS combdrives for diverse design cases. A number of electrostatic problems for typical MEMS combdrive designs were analyzed to check the efficiency and validity of this new technique. It is found that the numerical results computed by coarse mesh DBEM match the reference data from a large refined mesh FEM very well, and the accuracy and performance of DBEM are also better than those of conventional BEM for solving the electric intensity field of MEMS combdrives. By way of the DBEM presented in this paper, an accurate and reasonable electrostatic field can be obtained, and the follow-up control method of levitating force for the MEMS combdrive can be implemented more precisely.
Prevalence of metallo-beta-lactamases (MBLS) producing Pseudomonas aeruginosa in hospitalized patients in rural tertiary care hospital in Uttar Pradesh, India

Background: Pseudomonas aeruginosa is a leading cause of nosocomial infections due to MBLs production with limited therapeutic options, higher rate of colonization is encountered in hospitalized patient streated with broad spectrum antibiotics. This study was conducted with an aim to know the prevalence of Carbapenem resistant MBLs producing strains of Pseudomonas aeruginosa in hospitalized patients.Methods: A total of 14700 samples were obtained from various wards during Jan 2016 to June 2017, were screened for P. aeruginosa by conventional culture and biochemical tests. All confirmed P. aeruginosa isolates were further subjected to Modified Kirby- Bauer disc diffusion test as per CLSI guidelines. All IPM resistant isolates were screened for MBL production by DDST, CDST, MHT and E-test MBL.Results: Atotal of 1423were identified as P. aeruginosa. The isolation rate of P. aeruginosa at our hospital was 9.7%. Among these, 130(9.1%) isolates were IPM resistant. A total of 111 (85.4%) were MBL positive by CDST and E-test, 92 (70.5%) by DDST and 80 (61.5%) by MHT. The prevalence of MBL producing P. aeruginosa was 111/1423(7.8%) while among IPM resistant P. aeruginosa, its prevalence was 111/130 (85.4%). Conclusions: The study documents presence of nosocomial MBL producing P. aeruginosa strains in our Institute. E-test and CDST were superior to DDST and MHT for detection of MBLs.
Increasing Face Recognition Rate

Abstract: This paper describes and discusses a set of algorithms which can improve face recognition rates. These algorithms include adaptive K-Nearest Neighbour, adaptive weighted average, reverse weighted average and exponential weighted average. Essentially, the algorithms are extensions to the basic classification algorithm used in most face recognition research. Whereas the basic classification algorithm selects the subject with the shortest associated distance, the algorithms presented in this paper manipulate and extract information from the set of distances between a test image and the training image set in order to obtain more accurate classifications. The base system to which the algorithms are applied uses the eigenfaces technique for recognition with an adapted Viola and Jones algorithm for face extraction. Most of the algorithms proposed show a consistent improvement over the baseline test.
Non-radial motion in the TeV blazar S5 0716+714 The pc-scale kinematics of a BL Lacertae object

Context. Flat-spectrum radio sources often show a core-jet structure on pc-scales. Individual jet components reveal predominantly outward directed motion. For the BL Lac object S5 0716+714 conflicting apparent velocities have been reported in the literature. This object is an intra-day variable source and suited to investigate a possible correlation between kinematic properties and flux-density variability on different timescales. Aims. We study the kinematics in the pc-scale jet of S5 0716+714 to determine the apparent speeds of the jet components based on a much improved data set. In addition, we search for correlations between the radio flux-density light curves and the morphological changes detected along the VLBI jet. Methods. We (re-)analyze 50 VLBI observations obtained with the VLBA at 5 different frequencies (5–43 GHz) between 1992.73 and 2006.32. The data have been parameterized using circular Gaussian components. We analyze the jet component motion in detail taking care not only to account for motion in the radial but also in the orthogonal direction. We study the evolution of the jet ridge line and investigate the spectral properties of the individual components. We search for correlations between radio band light curves and the kinematic properties of the jet components. Results. We present an alternative kinematic scenario for jet component motion in S5 0716+714. We present evidence for the apparent stationarity of jet components (with regard to their core separation) with time. Jet components, however, do seem to move significantly non-radially with regard to their position angle and in a direction perpendicular to the major axis of the jet. We discuss a possible correlation between the long-term radio flux-density variability and apparent jet component motions. Conclusions. In S5 0716+714 an alternative motion scenario is proposed. With regard to the core separation, rather stationary components can fit the VLBI observations well. A new model to explain the observed motion with regard to the position angle is required. Based on the correlation between the longterm radio flux-density variability and the position angle evolution of a jet component, we conclude that a geometric contribution to the origin of the long-term variability might not be negligible. Subluminal motion has been reported for most of the TeV blazars. Our analysis also confirms this finding for the case of S5 0716+714. This result increases the number of TeV blazars showing apparent subluminal motion to 7.
The Impact of Indecent Dressing on the Academic Performance of Students in Tertiary Institutions, a Case Study of Ho Polytechnic in Ghana

Education is considered to be the bed-rock of development of any nation; hence the call by governments for “education for all”. However, certain developments over the past years seem to be militating against this vision. Notable among them is the craze for the so-called fashion which has resulted in nudity among the teaming youth on Ho Polytechnic campus. This paper therefore sought to investigate the impacts or effects nudity or indecent dressing has on the academic performance of Ho Polytechnic students in Ghana. This was done by employing the descriptive (qualitative) method of research to describe the relationship between variables. The research strategy used was a case study using students (203), teaching (126) and non-teaching staff (21) of Ho Polytechnic as the accessible population. Data were collected for the study by the employment of the survey technique in which 450 questionnaire copies were administered to the accessible population. This was combined with the participant observant approach where indecent dressings were observed and recorded. A main finding of the study is that about 60% of Ho Polytechnic students dress indecently. And out of this, about 80% are females while 20% are males. The study further revealed that provocative dressing or indecent dressing destructs the attention of both students and lecturers during lectures. Also, some leakages of examination questions on Ho Polytechnic campus can be attributed to sexual favours from lecturers as a result of indecent dressing. Key words : Ghana, Ho Polytechnic, indecent, academic performance, students
The Effects of a Music Composition Activity on Chinese Students' Attitudes and Beliefs towards Mathematics: An Exploratory Study

This article presents an exploratory research investigating the integration of pop music and statistics lesson as an intervention to promote students’ attitudes and strengthen and extend their beliefs towards mathematics. Thirty-five students randomly selected from 189 students in 6 th grade in a primary school in Southeast China were provided a 90-minute mathematics lesson integrated with music composition activity taught by the first author. Pre-and post-questionnaires with closed-ended and open-ended questions on evaluating students’ attitude and belief toward mathematics were provided before and after the lesson. The results demonstrated the mathematics lesson integrated with music had a positive effect on students’ attitude and beliefs toward mathematics learning.