Miracle-dz/UniFAR-FTUs huggingface dataset:
Model of work-related ill health of academic staff in a South African higher education institution

The objective of this study is to investigate the relationships between burnout, ill health, job demands and resources, and dispositional optimism in a higher education institution in South Africa. A survey design was used. The study population (N = 279) consisted of academic staff working in a higher education institution. The Maslach Burnout Inventory – General Survey, The Life Orientation Test – Revised, Job Demands-Resources Scale and the Health subscale of the ASSET were used as measuring instruments. A good fit was found for a model in which burnout (exhaustion and cynicism) mediated the relationship between perceived high job demands and low availability of job resources, and ill health. Dispositional optimism had direct effects on burnout and ill health. During the past two decades, higher education institutions from all over the globe have been confronted with a series of complex changes, challenging their mandates, traditional practices, authority and organisational structures (Doyle and Hind 1998; Hugo 1998; Nixon, Marks, Rowland and Walker 2001). In particular, higher education institutions in South Africa are currently undergoing a process of transformation in an attempt to move away from the ethos and struggles inherited from the apartheid educational era towards a democratic society (Dlamini 1995; Hugo 1998). At the same
Application of Taguchi approach to optimize friction stir welding parameters of polyethylene

This paper presents experimental and numerical results of butt friction stir welding of high density polyethylene. The FSW designed tool insulates the welded samples and preserves the heat gained from friction thus avoiding the appearance of blisters and splits after welding. The experimental tests, conducted according to combinations of process factors such as rotation speed, welding speed, pin diameter and hold time at beginning welding, were carried out according the Taguchi orthogonal table L27 in randomized way. Temperatures in the joint during the welding operation and flow stresses from the tensile tests of welded samples were measured and variances were analyzed. Identified models were used to simulate, by finite elements, the tensile tests performed on specimens having a weld cordon in their active area. The results show coherence between the numerical predictions and experimental observations in different cases of weld cordon mechanical behaviour.
Determinants of Corporate Trade Credit: An Empirical Study on Korean Firms

This study is designed to determine the motives for trade credit in Korean firms. Based on data collected from 14,660 firm-year observations running from 1992 to 2011 on the Korean Stock Exchange, this paper finds strong evidence on determinants of trade credit based on financial characteristics. The principal result is that older firms with larger size, lower growth, and higher profits tend to extend accounts receivable. This evidence, while consistent with the access to financing hypothesis, is difficult to reconcile with the growth hypothesis and price discrimination hypothesis. Second, this paper provides evidence that firms with larger size and greater leverage, as well as young firms, appear to use accounts payable. This finding, while consistent with the financial constraint hypothesis, is difficult to harmonize with the financing and growth hypothesis. The paper contributes to the argument about trade credit motives. It may help managers in making financial policy concerning improving firm value in the Korean market.
Life Satisfaction and Psychological Well-Being of Rescue Operations Participants in a Prolonged Emergency Situation

This paper reports on study which investigated specificity of life satisfaction and psychological well-being of rescue operations participants in emergency situation. Participants of the study were military servants and emergency workers (44 males, aged 19-26) who were compared to the men not taking part in the rescue operations (44 males, aged 17-26). Data were collected with Personal Wellbeing Index and the Ryff’s Scale of Psychological Well-Being. Emergency situation is considered as a challenge for personal growth. The study proved that an emergency (in this case, flooding of large areas where people lived) creates a “challenge” for a person (rescuer or participant). As a result, there is a mobilization of physical and spiritual resources of an individual. Participants of the rescue operations are characterized by activity in the situation management; they have the ability of effective use of the life circumstances. The result is rising of the subjective and psychological well-being level.
Glocalized Production: The Evolution of Global Production

In light of the challenges of the current globalized production model, four global Danish companies were interviewed with the purpose of exploring “glocalized production” as the new step and solution to the challenges of the “global village. ” The research sought to gauge the interest on “glocalized production” by key managers of these companies, and test three hypotheses: that a definition could be established from “glocalization” aspects, that it will reduce supply chain complexity, and that it can affect organizational trust levels. The results are presented along with suggestions to pave the way for future research on this emerging topic.
Seismic modelling of the late Be stars HD 181231 and HD 175869 observed with CoRoT: a laboratory for mixing processes

Context. HD181231 and HD175869 are two late rapidly rotating Be stars, which have been observed using high-precision photometry with the CoRoT satellite during about five consecutive months and 27 consecutive days, respectively. An analysis of their light curves, by Neiner and collaborators and Gutierrez-Soto and collaborators respectively, showed that several independent pulsation g-modes are present in these stars. Fundamental parameters have also been previously determined by these authors using spectroscopy. Aims. We aim to model these results to infer seismic properties of HD181231 and HD175869, and constrain internal transport processes of rapidly rotating massive stars. Methods. We used an adiabatic (NRO) and a non-adiabatic (Tohoku) oscillation code that accounts for the combined action of Coriolis and centrifugal accelerations on stellar pulsations as needed for rapid rotator modelling. We coupled these codes with a 2D (ROTORC) stellar structure model to take the rotational deformation of the star into account. The action of transport processes was parametrised with the mixing parameter α, which represents the ”non-standard” extension of the convective core, and determined by matching observed pulsation frequencies assuming a single star evolution scenario. In a second step, we used (Geneva) evolution models to evaluate the contribution of the secular rotational transport and mixing processes in the radiative envelope. A Monte Carlo analysis of spectropolarimetric data was also performed to examine the role of a potential fossil magnetic field. Finally, based on state-of-the-art modelling of penetrative convection and internal waves, we unravelled their respective contribution to the needed ”non-standard” mixing. Results. We find that extra mixing of α = 0.3 0.35Hp is needed in HD181231 and HD175869 to match the observed frequencies with those of prograde sectoral g-modes. We also detect the possible presence of r-modes. We investigated the respective contributions of several transport processes to this mixing: the hydrodynamical processes in particular the meridional circulation and shear-induced turbulence caused by the radiative envelope differential rotation, the possible magnetic field, the penetrative convection at the top of the convective core, and the transport by internal waves. Conclusions. We showed that the extension of the convective core needed to match observations and models may be explained by mixing induced by the penetrative movements at the bottom of the radiative envelope and by the secular hydrodynamical transport processes induced by the rotation in the envelope. We showed how asteroseismology opens a new door to probe transport processes in stellar interiors.
Biased Technological Change and Poverty Traps

This paper presents a model in which technological change increases the share of reproducible factors at the expense of nonreproducible ones. When reproducible factors are abundant, firms have incentives to adopt technologies that are intensive in such resources, and this increases the incentives to invest more in them. This feedback process may generate growth or also stagnation: when reproducible factors are not abundant, firms do not have incentives to adopt technologies intensive in those resources and technological change does not take place. The paper also analyzes how biased technological change a.ects interpersonal distribution of income: nonreproducible factors are more equally distributed than reproducible ones, thus biased technological change increases inequality.
Hiding Secret Text in Quick Response Code and Transforming the Position of the Secret Data using Rotation Transformation

In order to provide high security and safety in the field of information hiding, this study proposes a novel technology using Steganography. An exotic steganographic algorithm, is used in this study, which Hides the secret text data in a 2D plane (Here, in our case let the 2D plane be the QR code), after encryption and the position of the secret data will be changed using rotation transformation. The proposed algorithm has been tested under various imperceptibility characters such as PSNR, MSE, Human Vision Quality Metrics and Histograms are compared to both cover image and the stego image. This novel algorithm shows Lower MSE, higher PSNR values and it is evident that the proposed algorithm is robust to JPEG attacks.
Results of monitoring of amr systems in Norway: Analysis of metered data and definition of the performance parameters

The paper is based on results of big-scale implementation of AMR systems in Norway and a consequent monitoring of performance of those for six DSOs in Norway. The data were collected from approximately 17.000 customers for a period of six years. The data has been statistically analysed by using the software tool Useload, developed at SINTEF Energy Research. Based on this, the study proposes definitions of two key parameters: metering quality and metering availability, which describe performance of AMR systems throughout the whole value chain. The study further makes a comparative analysis of metering quality and metering reliability for the six participating DSOs and defines a mathematic relationship between them.
The grey escape: How and why are older people really using their free bus pass?

Since 2008 those aged sixty and above have benefitted from unlimited area-wide free travel by bus after 09:30. The official policy rhetoric supporting implementation of the measure drew significantly upon the need to reduce social exclusion amongst older people. However, despite a substantial increase in the number of concessionary journeys in England and the associated cost liabilities for local authorities and possibly also operators, there is currently only limited understanding of the wide-ranging effects of providing a free pass on bus use, and in particular to whom benefits from the policy accrue. In part this circumstance results from a methodological focus by evaluation studies hitherto that has favoured aggregate-level data, often at the expense of the very rich contextual information that helps us understand how the individual benefits from using the pass. With this in mind, this paper seeks to understand more about the effects (both intended and unintended) of providing a free bus pass to older people. The paper specifically explores how pass users currently use the bus and how this has changed since the provision of free area-wide travel, highlighting the existence of both tangible and intangible benefits arising from the way pass holders use the bus. Second, it examines what the data can tell us about the benefits of the pass to the individual, leading to the finding that the nature and extent of benefits can vary between different groups of pass holders. The paper offers a fresh insight into previously unexplored uses and benefits of the concessionary bus pass. The paper concludes by exploring possible policy implications of the research in the context of the UK‟s ageing and growing population.
Computing the preconditioner for the Schur complement

The Newton scheme is used to construct an approximate inverse preconditioner for the Schur complement. However, this scheme is very expensive because of the computation cost of the matrix-matrix product. In this paper, the computation cost of the Newton scheme is reduced by implementing the preconditioner implicitly using the matrix-vector product. We also show that such an implementation is less expensive than computing the preconditioner explicitly.
Initial Investigation on the Diet of Eastern Grass Owl (Tyto longimembris) in Southern Taiwan

This investigation, undertaken in the two regions of Nanshi and Yujing in Tainan County over the period of 2001 to 2003, included three nests belonging to the Eastern Grass Owl (Tyto longimembris). From these, we collected a total of 157 owl pellets. Analysis and examination of the pellets revealed 329 prey items. More in-depth investigation determined that 95.1% of the Eastern Grass Owl pellets collected consisted of mammal remains, while the remaining 4.9% were made up of bird remains. Of the various types of mammals consumed, rats made up the highest proportion, with a total of 285 rats, accounting for 86.6%. This was followed by 27 shrews and moles, accounting for 8.2%. Hares and birds were seldom caught and consumed. The findings suggested that rats are the main food source of the Eastern Grass Owl, with the Spinus Country-rat (Rattus losea) comprising the majority with 136 counted (41.3%), followed by the Formosan Mouse (Mus caroli) with 96 counted (29.2%). Regarding biomass, the reversion method was used to calculate that owls at the three nests consumed approximately 22,987 grams of mammal and 480 grams of bird, accounting for 98.0% and 2.0%, respectively. The biomass consumed for each pellet was approximately 149.5 g.
The influence of the sidereal cosmic-ray anisotropies originated on the tail- and nose-boundaries of the heliomagnetosphere (HMS) upon the solar cosmic-ray anisotropy produced inside the HMS

The solar diurnal variation of cosmic rays was considered to be fully explained by the diffusion-convection theory. Recently, however, it has been found that the geographic latitude distribution of the yearly averaged diurnal variations observed with the neutron monitors and the muon telescopes on the ground does not agree with that expected from the theory. The difference between the two distributions is observed almost every year, and it is especially remarkable in the solar activity minimum period in the positive polarity state of the solar polar magnetic field, when the diurnal variation reduces its magnitude and shifts its phase towards the morning side. It is shown that such a difference is produced by the seasonal variation of the sidereal heliotail-in and helionose-in anisotropies with respective right ascensions of 6 h and 18 h according to the following process. Generally, if any sidereal anisotropy from the right ascension α is subject to the seasonal variation with its maximum and minimum at the times when the Earth is closest to and farthest from the source of the anisotropy, respectively, located through its direction at the boundary of the HMS, it produces a yearly averaged residual flux from 0 h LT in solar geographic polar coordinates regardless of its direction (α). This residual flux from 0 h LT produces the difference mentioned above.
Population Genetics and Bumble Bee Conservation: Saving Species by Thinking Small

2 Introduction.9-31 Population Genetics and Conservation Case Studies.7-17 Primer on Landscape Genetics.17-20 Microsatellites.20-28 Bumble Bee Colony Structure and the Effects on Genetics.28-30 My Hypothesis.30-31 Material and Methods.32-53 Field Collection and Species Identification.32-35 DNA Extraction.35-41 Primer Development.41-43 PCR.43-50 Gel Electrophoresis.50-51 “A Poor Man’s Approach to Genetyping. ” (Schuelke, 2000). 51-53 Results.54-62 Species Diversity and Distribution.54-56 DNA Extraction.56-57 Establishing Final Protocol.57-59 The Final Protocol.59-62 Discussion/Conclusion.63-69 Microsatellite Length Analysis.62 Statistics for Microsatellite Analysis.63-64 Overlaying Results on a Geographic Map.64-65 Future Directions.66-67 Broader Implications.67-68 References.69-73
Establishing and Maintaining a Firm Nominal Anchor

A key practical challenge for monetary policy is to gauge the extent to which the private sector perceives the central bank’s nominal anchor as transparent and credible. In light of that challenge, this commentary discusses some evidence on the evolution of longer-term inflation expectations in three advanced economies and then highlights several econometric issues that are relevant in assessing whether a given central bank has effectively been following a price-level targeting regime or an inflation-targeting regime.
Florence at the dawn of the Renaissance : painting and illumination, 1300-1350

This is a gloriously illustrated look at the wealth of talent and artistic endeavour in Florence at the dawn of the Renaissance. Florence and the Renaissance have become virtually synonymous, bringing to mind names like Dante, Giotto, Boccaccio and many others whose creativity thrived during a time of unprecedented prosperity and intellectual innovation. With more than 200 illustrations, "Florence at the Dawn of the Renaissance" reveals the full complexity and enduring beauty of the art of this period, including panel paintings, illuminated manuscripts, and stained glass panels. The book considers not only the work of influential artists such as Giotto and Taddeo Gaddi, but also that of the larger community of illuminators and panel painters who collectively contributed to Florence's artistic legacy.
MULTIDIMENSIONAL LIQUIDITY : EVIDENCE FROM THE INDIAN STOCK MARKET

Various dimensions of liquidity including breadth, depth, resiliency, tightness, immediacy are examined using BSE 500 and NIFTY 500 indices from Indian Equity market. Liquidity dynamics of the stock markets are examined using trading volume, trading probability, spread, Market Efficiency coefficient, and turnover rate as they gauge different dimensions of market liquidity. We provide evidences on the order of importance of these liquidity measures in the Indian stock market using machine learning tools like Artificial Neural Network (ANN) and Random Forest (RF). Findings reveal that liquidity variables collectively explain the movements of stock markets. Both these machine learning tools perform satisfactorily in terms of mean absolute percentage error. We also find a lower level of liquidity in the Bombay Stock Exchange (BSE) than the National Stock Exchange (NSE) and findings supports the liquidity enhancement program recently initiated by BSE.
MACS J1423.8+2404: gravitational lensing by a massive, relaxed cluster of galaxies at z= 0.54

We present results of a gravitational lensing and optical study of MACS J1423.8+2404 (z=0.545, MACS J1423), the most relaxed cluster in the high-redshift subsample of clusters discovered in the MAssive Cluster Survey (MACS). Our analysis uses high-resolution images taken with the Hubble Space Telescope in the F555W and F814W passbands, ground-based imaging in eight optical and near-infrared filters obtained with Subaru and Canada–France–Hawaii Telescope, as well as extensive spectroscopic data gathered with the Keck telescopes. At optical wavelengths, the cluster exhibits no sign of substructure and is dominated by a cD galaxy that is 2.1 mag (K band) brighter than the second brightest cluster member, suggesting that MACS J1423 is close to be fully virialized. Analysis of the redshift distribution of 140 cluster members reveals a Gaussian distribution, mildly disturbed by the presence of a loose galaxy group that may be falling into the cluster along the line of sight. Combining stronglensing constraints from two spectroscopically confirmed multiple-image systems near the cluster core with a weak-lensing measurement of the gravitational shear on larger scales, we derive a parametric mass model for the mass distribution. All constraints can be satisfied by a unimodal mass distribution centred on the cD galaxy and exhibiting very little substructure. The derived projected mass of M[<65 arcsec (415 kpc)] = (4.3 ± 0.6) × 10^(14) M_☉ is about 30 per cent higher than the one derived from X-ray analyses assuming spherical symmetry, suggesting a slightly prolate mass distribution consistent with the optical indication of residual line-of-sight structure. The similarity in shape and excellent alignment of the centroids of the total mass, K-band light and intracluster gas distributions add to the picture of a highly evolved system. The existence of a massive cluster like MACS J1423, nearly fully virialized only ~7 Gyr after the big bang, may have important implications for models of structure formation and evolution on cosmological time scales.
Cloud Management Architecture for Private Clouds

Operation management for a private cloud infrastructure faces many challenges including efficient resource allocation, load-balancing, and quick response to real-time work- load changes. Traditional manual IT operation management is inadequate for this highly dynamic and complex environment. This work presents a distributed service architecture that is designed to provide an automated, shared, off-site operation management service for private clouds. The service architecture incorporates important concepts such as: Metric Templates for minimizing the network overhead for transmission of cloud metrics; a Cloud Snapshot that provides a global view of the current status of the cloud, supporting optimal decision making; and a Calendar-based Data Storage Model to reduce the storage required for cloud metric data and increase analysis performance. A proactive response to cloud events is generated based on statistical analysis of historical metrics and predicted usage. The architecture, functional components and operation management strategies are described. A prototype implementation of the proposed architecture was deployed as a service on the OpenStack. The effectiveness and usability of the proposed proactive operation management solution has been comprehensively evaluated using a simulated private cloud with dynamic workloads.