Miracle-dz/UniFAR-FTUs huggingface dataset:
Asymmetric information capacities of reciprocal pairs of quantum channels

Reciprocal pairs of quantum channels are defined as completely positive transformations which admit a rigid, distance-preserving, yet not completely-positive transformation that allows to reproduce the outcome of one from the corresponding outcome of the other. From a classical perspective these transmission lines should exhibit the same communication efficiency. This is no longer the case in the quantum setting: explicit asymmetric behaviours are reported studying the classical communication capacities of reciprocal pairs of depolarizing and Weyl-covariant channels.
The Challenges of Low-Frequency Radio Polarimetry: Lessons from the Murchison Widefield Array

Abstract We present techniques developed to calibrate and correct Murchison Widefield Array low-frequency (72–300 MHz) radio observations for polarimetry. The extremely wide field-of-view, excellent instantaneous (u, v)-coverage and sensitivity to degree-scale structure that the Murchison Widefield Array provides enable instrumental calibration, removal of instrumental artefacts, and correction for ionospheric Faraday rotation through imaging techniques. With the demonstrated polarimetric capabilities of the Murchison Widefield Array, we discuss future directions for polarimetric science at low frequencies to answer outstanding questions relating to polarised source counts, source depolarisation, pulsar science, low-mass stars, exoplanets, the nature of the interstellar and intergalactic media, and the solar environment.
Numerical modelling of algebraic closure models of oceanic turbulent mixing layers

We introduce in this paper some elements for the mathematical and numerical analysis of algebraic turbulence models for oceanic surface mixing layers. In these models the turbulent diffusions are parameterized by means of the gradient Richardson number, that measures the balance between stabilizing buoyancy forces and destabilizing shearing forces. We analyze the existence and linear exponential asymptotic stability of continuous and discrete equilibria states. We also analyze the well-posedness of a simplified model, by application of the linearization principle for non-linear parabolic equations. We finally present some numerical tests for realistic flows in tropical seas that reproduce the formation of mixing layers in time scales of the order of days, in agreement with the physics of the problem. We conclude that the typical mixing layers are transient effects due to the variability of equatorial winds. Also, that these states evolve to steady states in time scales of the order of years, under negative surface energy flux conditions.
On the δ Scuti star in the eclipsing binary WX Eridani

WX Eri is an eclipsing binary system for which one component was reported to show δ Scuti type pulsations with periods close to integer fractions of the orbital period. This makes it an interesting candidate for investigating the interaction be- tween binarity and pulsation and a potential new member of the recently defined group of mass-accreting pulsating components (gainers) in semi-detached Algol binaries called "oscillating EA" stars. We present new photometric time-series observations of this star. The Wilson-Devinney code was applied to find the best fitting model for the eclipsing binary's light curve. The aim of the observations was to investigate the short-period δ Scuti type pulsations of WX Eri. However, no evidence for the presence of such oscillations was found in our data.
Inventor, Founder or Developer? An Enquiry into the Passion that Drives Craft Breweries in Victoria, Australia

The brewing industry is undergoing dramatic changes in many countries, with increasing numbers of craft breweries appealing to niche markets and challenging the traditional volume based business model of major corporations. Yet, little research has addressed the craft beer industry let alone their owners. The study argues that some form of 'entrepreneurial passion' drives the development of business models by the craft beer entrepreneurs. Building upon the typology of role identities related to entrepreneurial passion, this paper investigates how different objects of passion influence the business models that craft brewers choose to operate.
Over-expression of Sub1A, a submergence tolerance gene from rice, confers enhanced hypoxic stress tolerance in transgenic tobacco plants

Sub1A, an ethylene-response-factor-like (ERE-like) gene, mediates the extinguished submergence tolerance of rice. To gain further insight into the function of Sub1A in other species, we transformed tobacco plants with the gene under the control of the ubiquitin promoter. Compared to the wild-type plants, transgenic plants over-expressing Sub1A exhibited a greater ability to adapt to hypoxia, as evidenced by the highly induced activities of enzymes (pyruvate decarboxylase and alcohol dehydrogenase) regulating ethanolic fermentation. Furthermore, Sub1A upregulated activities of the main antioxidant enzymes, such as superoxide dismutase, ascorbate peroxidase and catalase, making the transgenic plants scavenge reactive oxygen species (ROS) more effectively. This was further confirmed by the less accumulation of malondialdehyde, an end product of lipid peroxidation. Taken together, our results suggest that Sub1A promotes plants hypoxic stress tolerance by regulating genes involved in anaerobic metabolism as well as ROS amelioration. In addition, it also suggests that Sub1A can be used potentially to improve hypoxic stress tolerance in plant breeding.
Liberalizing Professional Services: Evidence from Italian Lawyers

This paper presents a new model of occupational licensing, where producers are heterogeneous both in their ability or productivity and in the level of the barriers to entry in the profession that they face. The model bears important implications on the effects of liberalization policies that differ dramatically from those implied by the standard model, where heterogeneity is unidimensional in productivity. Specifically, we find that liberalization policies induce higher quality of services if barriers to entry are high for the most able agents. The opposite if such a correlation is low. We test these implications using detailed microdata on Italian lawyers and find a strong effect of the 2006 Italian liberalizing reform on the composition of the outflows from the legal profession. While higher ability lawyers are more likely to leave the profession before the reform, the opposite happens in its aftermaths, consistently with the idea that monopoly power selects high-productivity lawyers out of the profession.
Quadratic Variance Swap Models

We introduce a novel class of term structure models for variance swaps. The multivariate state process is characterized by a quadratic diffusion function. The variance swap curve is quadratic in the state variable and available in closed form, greatly facilitating empirical analysis. Various goodness-of-fit tests show that quadratic models fit variance swaps on the S&P 500 remarkably well, and outperform affine models. We solve a dynamic optimal portfolio problem in variance swaps, index option, stock index and bond. An empirical analysis uncovers robust features of the optimal investment strategy.
Filtration Gas Combustion in a Porous Ceramic Annular Burner for Thermoelectric Power Conversion

ABSTRACT A numerical study of the combustion of lean methane/air mixtures in a porous media burner is performed using novelty geometry, cylindrical annular space. The combustion process takes place in the porous space located between two pipes, which are filled with alumina beads of 5.6 mm diameter forming a porosity of 0.4. The outer tube diameter of 3.82 cm is isolated; meanwhile the inner tube of 2 cm in diameter is covered by a continuous set of thermoelectric elements (TE) for transforming heat energy into electricity. To achieve and maintain the proper temperature gradient on TE, convective heat losses are considered from the TE. Computer simulations focus on the two-dimensional (2D) temperature analysis and displacement dynamics of the combustion front inside the reactor, depending on the values of the filtration velocity (0.1 to 1.0 m/s), the heat loss coefficient from the internal cylinder (400–1500 W/m2/K), and the fuel equivalence ratio (0.06– 0.5). The conditions that maximized the overall performance of the process of energy conversion are: 0.7 m/s of the filtration velocity, 0.363 of the fuel equivalence ratio and 1500 W/(m2·K) of the heat transfer coefficient from the internal cylinder, to obtain 2.05 V electrical potential, 21 W of electrical power, and 5.64% of the overall process efficiency. The study shows that the cylindrical annular geometry can be used for converting the energy of combustion from lean gas mixtures into electricity, with a performance similar to the specified by manufacturers of thermoelectric elements (TE).
Accelerating Agricultural Productivity to Enhance Economic Growth in Botswana

The need to diversify the economy so as to ensure sustainable economic growth has been of great concern. Accelerating productivity in agriculture is seen as one of the alternatives to support the diversification initiatives by the government and drive growth in Botswana. This study discusses the factors contributing to increased long term agricultural productivity and hence its subsequent impact on growth in the short. The study employs the vector error correction model and annual data to explain the connection between key variables. This paper concludes that there is unidirectional causality from agricultural productivity to growth. This study shows that economic growth can be improved in the short term by improvements in agricultural productivity. Agricultural productivity can be enhanced by providing adequate infrastructure, additional farming machinery per hectare of arable land and having a targeted approach in the provision of funding towards agricultural oriented initiatives.
On The Power to Hurt: Costly Conflict with Completely Informed States

Slantchev (2003, American Political Science Review, 97) studies a class of negotiation models to explain costly conflict between two completely informed nations. In one of his main propositions (Proposition 2.3), Slantchev provides a strategy profile to support the so-called extremal subgame perfect equilibrium, where one nation receives its lowest equilibrium payoff. By means of a counter example, we demonstrate the existence of an equilibrium with one nation's payoffs below the strategy profile provided in his Proposition 2.3 (Case 2).
A Go/No-go approach to uncovering implicit attitudes towards safe and risky driving

Orbit (12/08/2019) A Go/No-go approach to uncovering implicit attitudes towards safe and risky driving Self-report measures of driving-related attitudes and beliefs miss potentially important precursors of driving behaviour, namely, automatic and implicit thought processes. The present study used an adapted Go/No-go Association Task to measure implicit thought without relying on the participants' self-reports. Implicit attitudes towards safe and risky driving were measured in 53 Danish drivers (31 female, 22 male). Further, we explored the relationship between implicit attitudes towards risky and safe driving, and self-reported driving behaviour and skills. The results suggest that implicit attitudes towards driving behaviour can be measured reliably with the Go/No-go Association Task. Also, the results suggest that implicit attitudes towards safe driving and risky driving, respectively, may be separable constructs, and might thus stem from different cognitive processes. Finally, implicit attitudes were significantly related to self-reported driving behaviour and skills for male (but not female) drivers. Pending future research with larger sample sizes, the difference between implicit attitudes towards safe versus risky driving that we observed may contribute to a greater theoretical understanding of the causes of safe and risky driving.
The enigmatic phenotype: Relevant signs and symptoms in schizophrenia

Ever since schizophrenia was conceptualized by Kraepelin and Bleuler, attempts have been made to rearrange signs and symptoms in order to achieve an useful disease concept with consequences for outcome, prognosis, treatment response and etiology. Several procedures were used to describe relevant phenotypes of the disease. In the beginning, famous psychiatrists conceptualized definitions of schizophrenia which was followed by a consensus about the operational criteria of schizophrenia. Later, more emphasis was placed on the statistical analyses of symptoms present in patients with psychotic disorders which resulted in a great variety of symptom clusters. In another approach, investigators try to deconstruct psychiatric diagnoses in search for so called endophenotypes of which covert symptoms like cognitive deficits in schizophrenia, are an example. The value of all these endeavours ultimately depends on the external validity which means that a relationship has to be established with the etiology, treatment response and outcome. The premises of all these research efforts is, however, the idea that the pathogenic agent of schizophrenia or a subtype will be found. In this paper an outline of the literature about the ordening of overt and covert symptoms in schizophrenia is presented. It is concluded that the different approaches are essential analogue and that research into the delineation of cognitive deficits and their treatment is at present most promising.
Does altitude training benefit the sea-level performances of athletes?

GARDNER, B.D. Does altitude training benefit the sea-level performance of athletes? Purpose: The review was conducted to provide an insight into the possible benefits altitude training has on sealevel performance and possible ways that altitude training programs can be modified to achieve greatest improvements for particular individual sports utilising either the aerobic or anaerobic energy systems. A review of possible methods to detect responders and non-responders was also included. Methods: Limited to articles in English and those located in the University of the Sunshine Coast, Australia library database or available free online, databases “PubMed”, “Web of Science” and “Google Scholar” were searched (1992 through 2009) using the search terms: “altitude training”, “sea-level performance”, “hypoxia” and “athletes”. Citations were omitted if they excluded control groups. Results: Physiological adaptations were found in most subjects following return to normoxia, however, these adaptations did not always equate into performance benefits. This included elevated erythropoietin levels without corresponding increases in reticulocyte formation. Such benefits as increases in VO 2 max (7%), red cell mass (9%), Hbconc. , maximal power output, mean power output in 4min, improved running and decreased time-trial duration were reported in subjects at sea-level following altitude sojourns. The greatest benefit on the aerobic energy at sea level was in subjects who lived at altitude (>20h.day -1 at 2500m) and trained in normoxia for four weeks. The greatest increase in the anaerobic system was in subjects who spent 2h.day -1 exercising at 60-70% heart rate reserve for 10days. Conclusion: Further research needs to be done before it can be scientifically proven that altitude training enhances both aerobic and anaerobic sea-level performances. It’s also recommended that future studies not restrict the training program to that on a treadmill or cycle ergometer. Key Words: ALTITUDE, ACCLIMATISATION, HYPOXIA, NORMOXIA, SPORTS, MAXIMAL OXYGEN UPTAKE
Alkan University College Student Information Management System

The system which is developed in this project, student information management system, provides users a simple and efficient way of maintaining student information. The main objective of this project is to build system that allows users to truck student information and manage the school teaching learning process easily. It can be used by educational colleges to keep student and student related data. Student information management system deals with academic related reports, news and the details of student, course, instructor, student grades and other resource related details. And also the system enables users to generate semester grade reports and student transcript at the end of graduation. The system was developed using technologies such as PHP, HTML, JAVA SCRIPT, CSS and MySQL. PHP, HTML, JAVA SCRIPT and CSS are used to build the frontend or user interface and the backend or database was built using MySQL Database.
Effect of Pressure Gradient and Initial Water Saturation on Water Injection in Water-Wet and Mixed-Wet Fractured Porous Media

Summary A systematic study of the effect of wettability and initial water saturation on water injection and imbibition is made in Kansas outcrop chalk samples. (Kansas outcrop chalk is very similar to the rock matrix of the North Sea fractured chalk reservoirs.) Waterinjection tests were conducted at different pressure gradients to simulate the effect of gravity (that is, negative P,) on recovery. Based on a large number of carefully conducted tests, the following conclusions are drawn: Initial water saturation has a pronounced effect on water injection in an intermediate-wet chalk. This effect is much less pronounced for a strongly water-wet chalk. The effects are also in opposite directions. Pressure gradients (which simulate the negative P, effect) have a very strong effect on water-injection performance in an intermediate-wet chalk. Our interpretation of these experiments leads to the conclusion that recovery from the chalk reservoirs may be nearly independent of wettability state. The results from the experiments also reveal that there is no relation between laboratory measurements of spontaneous imbibition and field performance of mixed-wet reservoirs, even when the wettability state is perfectly restored in the laboratory.
Magnetohydrodynamics on an unstructured moving grid

Magnetic fields play an important role in astrophysics on a wide variety of scales, ranging from the Sun and compact objects to galaxies and galaxy clusters. Here we discuss a novel implementation of ideal magnetohydrodynamics (MHD) in the moving-mesh code arepo which combines many of the advantages of Eulerian and Lagrangian methods in a single computational technique. The employed grid is defined as the Voronoi tessellation of a set of mesh-generating points which can move along with the flow, yielding an automatic adaptivity of the mesh and a substantial reduction of advection errors. Our scheme solves the MHD Riemann problem in the rest frame of the Voronoi interfaces using the HLLD Riemann solver. To satisfy the divergence constraint of the magnetic field in multiple dimensions, the Dedner divergence cleaning method is applied. In a set of standard test problems, we show that the new code produces accurate results and that the divergence of the magnetic field is kept sufficiently small to closely preserve the correct physical solution. We also apply the code to two first application problems, namely supersonic MHD turbulence and the spherical collapse of a magnetized cloud. We verify that the code is able to handle both problems well, demonstrating the applicability of this MHD version of arepo to a wide range of problems in astrophysics.
Remoção de sementes por formigas como bioindicação de impacto pela mineração e esforços de recuperação

Ants have been widely used as bioindicator of mining impact and success recovery efforts, but the ecological functions played by them like removal seeds still are poorly used in this context. Thereby, this study evaluated the seed removal by ants in mining sites and in recovery process after mining with different ages and techniques, during rainy and dry seasons. It was evaluated: seed-removing ant species richness and composition; rate of seed removal; influence of environmental variables on the richness, composition and rate of seed removal; and ant species indicator of different recovery areas. Ant species were sampled in impacted areas by mining and in recovery process with different ages (2 to 10 years), native and exotic plants species, two types of exotic grasses and upon mine and sterile material. It was found difference on the species richness and composition, and rate of seed removal between impacted areas and controls, and among different recovery techniques and age. But seasonality had influence only on the ant species composition between impacted areas by mining and control areas. Environmental variables had influence on the richness, composition and rate of seed removal on the analysis about impacted areas by mining, while among recovery areas these variables influenced only the composition. Therefore mining activity threats the seed removal by ants, necessitating efficient recovery of these areas. Even after ten years of recovery, the richness and composition remain different of control areas. The use of native plant species and recovery upon mine are better recovery techniques. Finally, ants and their ecological function of seed removal can be used as bioindicator of mining impact and recovery effort after mining for analyzing and monitoring recovery process. Palavras-chave: Mining site. Recovery age. Recovery techniques. Habitat structure. Ant bioindicator.
Judging the Credibility and Professionalism of Citizen Journalism Versus Professional Journalism

Judging the Credibility and Professionalism of Citizen Journalism versus Professional Journalism Caroline Christiansen Hood Department of Communications, BYU Master of Arts Because of the advent of the Internet, traditional journalism is changing. Advanced technology includes the tools for everyone to publish their thoughts, feelings, photos, and videos, allowing individuals to be citizen journalists. This experimentaldesign study was aimed at discovering the influence of biographies in people’s judgments of the credibility and professionalism of news articles. The study involved four treatments 1: professional journalist feature article with professional journalist biography; 2: citizen journalist feature article with professional journalist biography; 3: citizen journalist feature article with citizen journalist biography; and 4: professional journalist feature article with citizen journalist biography. These treatments were used to determine how the 198 study participants judged the work and biography of a traditional journalist compared to the work and biography of a citizen journalist. Study data was acquired through an online survey. A credibility scale and a professionalism scale were used to determine that, based on the articles used in the study, news consumers do not see professional journalists as more credible than citizen journalists, although news consumers do see traditional journalists’ content as more professional.
Emotional Burden in Parents of Children with Trisomy 21: Descriptive Study in a Colombian Population

The role of a parent with a disabled child can be highly demanding. There are few publications concerning parental emotional exhaustion in Latin America. The present prevalent case-controlled study evaluated the frequency of emotional exhaustion in 103 parental couples of parents of children with Down Syndrome (DS); likewise the study explores the rate of emotionally exhausted and depressed mothers in comparison with the fathers. This outcome was measured using a modified and validated version of the Maslach Burnout Inventory. The results showed a prevalence of emotional exhaustion of 52.64%. In the matched-pair analysis we found a higher chance of exhaustion in mothers in comparison with their partners.