Miracle-dz/UniFAR-FTUs huggingface dataset:
Face Time in the Hotel Industry

Many hotel companies, and the hotel industry in general, have been cited as having a culture of face time, that is, a culture inducing its managers to spend considerable amounts of nonproductive time at work. This subject exploratory study seeks to provide greater understanding regarding this apparently common practice but understudied academic topic. This empirical study analyzes how and to what extent the culture of the hotel industry, and of specific lodging companies, relate to levels of face time. It also analyzes how differences in hotel location and size and differences in manager age and tenure affect the extent to which hotel managers report putting in nonproductive face time at work.
Arctic Ocean warming contributes to reduced polar ice cap

Analysis of modern and historical observations demonstrates that the temperature of the intermediate-depth (150–900 m) Atlantic water (AW) of the Arctic Ocean has increased in recent decades. The AW warming has been uneven in time; a local 1°C maximum was observed in the mid-1990s, followed by an intervening minimum and an additional warming that culminated in 2007 with temperatures higher than in the 1990s by 0.24°C. Relative to climatology from all data prior to 1999, the most extreme 2007 temperature anomalies of up to 1°C and higher were observed in the Eurasian and Makarov Basins. The AW warming was associated with a substantial (up to 75–90 m) shoaling of the upper AW boundary in the central Arctic Ocean and weakening of the Eurasian Basin upper-ocean stratification. Taken together, these observations suggest that the changes in the Eurasian Basin facilitated greater upward transfer of AW heat to the ocean surface layer. Available limited observations and results from a 1D ocean column model support this surmised upward spread of AW heat through the Eurasian Basin halocline. Experiments with a 3D coupled ice–ocean model in turn suggest a loss of 28–35 cm of ice thickness after 50 yr in response to the 0.5 W m−2 increase in AW ocean heat flux suggested by the 1D model. This amount of thinning is comparable to the 29 cm of ice thickness loss due to local atmospheric thermodynamic forcing estimated from observations of fast-ice thickness decline. The implication is that AW warming helped precondition the polar ice cap for the extreme ice loss observed in recent years.
Overeducation dynamics and personality

In this paper, we use the 2000–2008 waves of the German Socioeconomic Panel to examine overeducation transitions. The results are based on a first-order Markov model that allows us to account for both the initial conditions problem and potential endogeneity in attrition. We found that overeducation dynamics, especially the probability of entering overeducation, is significantly influenced by personality. Notwithstanding these differences associated with individual heterogeneity, there still appears to be considerable overeducation persistence. Almost 18% of the overeducation risk is due to individual state dependence, that is, the fact of having been overeducated in the previous year.
Time-domain and spectral properties of pulsars at 154 MHz

We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-scales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437−4715, and PSR J0630−2834, we observe interstellar scintillation and variability on time-scales of greater than 2 min. One further pulsar, PSR J0034−0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437−4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and time-scales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835−4510, PSR J1752−2806, and PSR J0437−4715.
Is There an Alternative to Exams?— Examination Stress in Engineering Courses*

Examination stress is probably a factor in the poorer than expected performance of some engineering students. This paper presents some evidence of this connection from a specific third level electronics course together with descriptions of several strategies adopted to alleviate it and resulting changes in performance. The literature on examination stress and the effectiveness of strategies to alleviate it is then reviewed in the light of the above experiences, leading to the conclusion that it is likely that examination stress is a significant factor in the academic performance of some engineering students, and possibly more so for those from Asian backgrounds. Further the literature suggests that the following actions have potential value for alleviating the poorer academic results flowing from examination stress: 1) employing good teaching and well structured materials and study programs; 2) using a variety of styles of assessment with opportunity to practice those styles; 3) allowing memory support such as by allowing open-book assessments; 4) including opportunities for students to comment on the assessment experience either during the assessment or soon afterwards; 5) asking questions that are either individualized or have elements of choice about answers; and 6) relaxing the time pressure on assessment activities.
Effect of AgNO 3 on androgenesis of Brassica oleracea L. anthers cultivated in vitro

The present article is a synthesis study accomplished at Vegetable Research and Development Station Bacau regarding the implication of silver nitrate (AgNO 3 ) in modulating the morphogenetic reaction of white cabbage anthers cultivated in vitro . According to literature, silver nitrate is a strong inhibitor of ethylene action. Embryo formation, shoot generation and rooting of plantlets are key points on which relies the entire concept of in vitro tissue culture. Silver ions, in the form of nitrate play an important role in promoting the somatic embryogenesis and organogenesis, which led its wide spread use in different plant tissue culture in vitro . Therefore, our researches focused on testing different concentrations of AgNO 3 (5, 10, 15, 25, 30, 50 and 60 μM) added to a pre-tested medium formula– Murashige and Skoog (MS), 1962 basal medium supplemented with benzylaminopurine (BAP)- 8.9 μM and naphthylacetic acid (NAA) 2.7 μM. The biological material is represented by unopened flower buds containing anthers with microspores at late uninucleate to binucleate stage. In the culture condition investigated in this study, the data obtained promotes the utilization of AgNO 3 in a concentration of 50 μM for the successfully induction and sustaining of regenerative processes of white cabbage anthers cultivated in vitro . Keywords: Buds, embryogenesis, ethylene, organogenesis, regeneration
Productivity Change in Health Care

Research on productivity change in health care has surged in recent years. This interest reflects both policy interest in the value of health care and improving data capabilities and methods for productivity research. Because of the central importance of quality change in health care, this research has directly or indirectly considered not only changes in the costs of producing health services (e.g., the cost of a hospital day), but also changes in the benefits of health services for patient health. Some studies have compared overall changes in population health to changes in aggregate medical expenditures. For example, recent studies by Kevin Murphy and Robert Topel (1999) and William Nordhaus (1999) suggest that the value to current and future generations of Americans of improvements in life expectancy in recent decades has exceeded $2 trillion per year. Accounting for the improvements in ageadjusted functional health that also appear to have occurred in recent decades (e.g., Kenneth Manton et al., 1997) makes the improvement in health even greater. Cutler and Elizabeth Richardson (1999) estimate that, even if only 25 percent of the overall improvement in health is attributable to medical care, then health-care productivity has risen. Yet translating this into health-care productivity calculations leaves many issues unresolved. It is not immediately clear how to determine the share of health improvements that result from medical care. Further, even if overall productivity improvements have been high, it is possible that many changes in health-care productivity have been less valuable. Identifying areas of high and low past and potential future productivity improvements would be helpful for guiding policymakers. For all of these reasons, much of the recent research on health-care productivity has focused on explicit analysis of costs and outcomes for certain common, serious health problems, where other factors can be controlled for and relevant inputs and health outcomes can be measured. In this paper, we review the "state of the art" of the evidence on health-care productivity. We first summarize a set of recent productivity studies of common conditions that account for a substantial fraction of overall medical spending. These studies also illustrate the range of methods that have been used in disease-level productivity studies. In general, the studies show rather substantial productivity gains in care. We then present new evidence on productivity of treatment for breast cancer, a disease that, at least in its most common forms in adults, many experts believe has seen little improvement in benefits of care over time. Considering cancer allows us to focus on a condition where there is no presumption that medical care has been worthwhile, and where there are a host of complex issues related to case-finding, the timing of diagnoses, and chronic care. We find that the treatment of cancer has had at best small productivity improvements. Outcomes have improved more on a per-case basis than when considering the population as a whole.
THE STATE OF THE ART IN ORTHOPEDIC MEASUREMENTS

This paper presents the current state of the measuring systems in orthopedics, analyzing each method with their advantages and disadvantages, range of applicability and measurement principle. Along with the existing methods, that are used by doctors, a length measurement system in orthopedics, which belongs to authors is described. The system is going be built and then tested, both as a clinical method for assessment of lower limb discrepancies, as well as intraoperative method, eliminating the risk of exposure to radiation of both patient and doctor.
The effect of ownership structure on dividend policy: evidence from Turkey

Purpose This paper aims to investigate the impact of ownership structure on dividend policy of listed firms in Turkey. Particularly, it attempts to uncover the effects of family involvement (through ownership and board representation), non-family blockholders (foreign investors, domestic financial institutions and the state) and minority shareholders on dividend decisions in the post-2003 period as it witnesses the major economic and structural reforms. Design/methodology/approach The paper uses alternative dividend policy measures (the probability of paying dividends, dividend payout ratio and dividend yield) and uses appropriate regression techniques (logit and tobit models) to test the research hypotheses, by focusing on a recent large panel dataset of 264 Istanbul Stock Exchange-listed firms (non-financial and non-utility) over a 10-year period 2003-2012. Findings The empirical results show that foreign and state ownership are associated with a less likelihood of paying dividends, while other ownership variables (family involvement, domestic financial institutions and minority shareholders) are insignificant in affecting the probability of paying dividends. However, all the ownership variables have a significantly negative impact on dividend payout ratio and dividend yield. Hence, the paper presents consistent evidence that increasing ownership of foreign investors and the state in general reduces the need for paying dividends in the Turkish market. Research limitations/implications Because of the absence of empirical research on how ownership structure may affect dividend policy and the data unavailability for earlier periods in Turkey, the paper cannot make comparison between the pre-and post-2003 periods. Nevertheless, this paper can be a valuable benchmark for further research. Practical implications The paper reveals that cash dividends are not used as a monitoring mechanism by investors in Turkey and the expropriation argument through dividends for Turkish families is relatively weak. Accordingly, the findings of this paper may benefit policymakers, investors and fellow researchers, who seek useful guidance from relevant literature. Originality/value To the best of the authors’ knowledge, this paper is the first to examine the link between ownership structure and dividend policy in Turkey after the implementation of major reforms in 2003.
Population genetics of Dioon edule Lindl. (Zamiaceae, Cycadales): biogeographical and evolutionary implications

Dioon edule Lindl. (Zamiaceae) is a cycad endemic to Mexico, that occurs as one species D. edule and the geographical variety D. edule var. angustifolium (Miq.) Miq. Dioon edule has a north to south distribution in eastern Mexico. In this study, we analysed 14 allozymic loci in eight populations of D. edule from its total distribution range by sampling all known populations. Patterns of diversity and genetic variability, within and among populations, were obtained. The mean number of alleles per locus ( A ) was 1.44 and the percentage of polymorphic loci was relatively high ( P = 54.78). The mean observed ( HO ) and expected heterozygosity ( HE ) were 0.27 and 0.24, respectively. F -statistics revealed an excess of heterozygous genotypes, locally and globally ( F = −0.17 and f = −0.27, respectively). The genetic variation explained by differences among populations was only 7.5%. We also detected a negative relationship between genetic diversity and latitude. On average, the gene flow between population pairs was relatively high ( Nm = 2.98); furthermore, gene flow between population pairs was significantly correlated with geographical distances ( r = −0.38, P = 0.025). Therefore, patterns of genetic diversity in D. edule appear to be associated with the post-Pleistocene spread of the species, from its southerly (origin) to its northerly range (derived populations, including its central distribution). The biogeographical and evolutionary aspects of the results of this study are discussed. We recognize Dioon angustifolium Miq. for the northernmost disjunct populations. © 2003 The Linnean Society of London, Biological Journal of the Linnean Society , 2003, 80 , 457–467
Conductance distribution in strongly disordered mesoscopic systems in three dimensions

Recent numerical simulations have shown that the distribution of conductance P(g) in 3D strongly localized regiem differs significally from the expected log normal distribution. To understand the origin of this difference analytically, we used a generalized DMPK equation for the joint probablity distribution of the transmission eigenvalues which includes a phenomenological (disorder and dimensionality dependent) matrix K containing certain correlations of the transfer matrices. We first of all examine the assumptions made in the derivation if the generalized DMPK and find that to a good approximation they remain valid in 3D. We then evaluate the matrix K numerically for various strength of the disorder and various system sizes. In the strong disorder limit we find that K can be described by a simple model which, for a cubic system, depends on a single parameter. We use this phenomenological model to analytically evaluate the full distribution P(g) for Anderson insulators in 3D. The analytic results allow us to develop an intuitive understanding of the entire distribution, which differs qualitatively from the log-normal distribution of a Q1D wire. We also show that out method could be applicable in the critical regime of the Anderson transition.
UvA-DARE (Digital Academic Repository) Space Telescope and Optical Reverberation Mapping Project.I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope

We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Significant correlated variability is found in the continuum and broad emission lines, with amplitudes ranging from ∼30% to a factor of two in the emission lines and a factor of three in the continuum. The variations of all the strong emission lines lag behind those of the continuum, with He II λ1640 lagging behind the continuum by ∼2.5 days and Lyα λ1215, C IV λ1550, and Si IV λ1400 lagging by ∼5–6 days. The relationship between the continuum and emission lines is complex. In particular, during the second half of the campaign, all emission-line lags increased by a factor of 1.3–2 and differences appear in the detailed structure of the continuum and emissionline light curves. Velocity-resolved cross-correlation analysis shows coherent structure in lag versus line of sight velocity for the emission lines; the high-velocity wings of C IV respond to continuum variations more rapidly than the line core, probably indicating higher velocity broad-line region clouds at smaller distances from the central The Astrophysical Journal, 806:128 (15pp), 2015 June 10 doi:10.1088/0004-637X/806/1/128 © 2015. The American Astronomical Society. All rights reserved. 40 NSF Postdoctoral Research Fellow. 41 Packard Fellow.
An Evaluation of the Predictability of Austral Summer Season Precipitation over South America

Abstract In this study predictability of austral summer seasonal precipitation over South America is investigated using a 12-yr set of a 3.5-month range (seasonal) and a 17-yr range (continuous multiannual) five-member ensemble integrations of the Center for Ocean–Land–Atmosphere Studies (COLA) atmospheric general circulation model (AGCM). These integrations were performed with prescribed observed sea surface temperature (SST); therefore, skill attained represents an estimate of the upper bound of the skill achievable by COLA AGCM with predicted SST. The seasonal runs outperform the multiannual model integrations both in deterministic and probabilistic skill. The simulation of the January–February–March (JFM) seasonal climatology of precipitation is vastly superior in the seasonal runs except over the Nordeste region where the multiannual runs show a marginal improvement. The teleconnection of the ensemble mean JFM precipitation over tropical South America with global contemporaneous observed sea surface .
Nitrogen and phosphorus limitation of oceanic microbial growth during spring in the Gulf of Aqaba

Bioassay experiments were performed to identify how growth of key groups within the mi- crobial community was simultaneously limited by nutrient (nitrogen and phosphorus) availability during spring in the Gulf of Aqaba's oceanic waters. Measurements of chlorophyll a (chl a) concentration and fast repetition rate (FRR) fluorescence generally demonstrated that growth of obligate phototrophic phyto- plankton was co-limited by N and P and growth of facultative aerobic anoxygenic photoheterotropic (AAP) bacteria was limited by N. Phytoplankton exhibited an increase in chl a biomass over 24 to 48 h upon relief of nutrient limitation. This response coincided with an increase in photosystem II (PSII) pho- tochemical efficiency (Fv/Fm), but was preceded (within 24 h) by a decrease in effective absorption cross- section (σPSII) and electron turnover time (τ). A similar response for τ and bacterio-chl a was observed for the AAPs. Consistent with the up-regulation of PSII activity with FRR fluorescence were observations of newly synthesized PSII reaction centers via low temperature (77K) fluorescence spectroscopy for addi- tion of N (and N + P). Flow cytometry revealed that the chl a and thus FRR fluorescence responses were partly driven by the picophytoplankton (<10 µm) community, and in particular Synechococcus. Produc- tivity of obligate heterotrophic bacteria exhibited the greatest increase in response to a natural (deep wa- ter) treatment, but only a small increase in response to N and P addition, demonstrating the importance of additional substrates (most likely dissolved organic carbon) in moderating the heterotrophs. These data support previous observations that the microbial community response (autotrophy relative to hetero- trophy) is critically dependent upon the nature of transient nutrient enrichment.
Responses of Hyalella Azteca to Chronic Exposure of Mississippi Delta Sediments

Hyalella azteca was used to assess biological impairment in sediments from nine water bodies in the Mississippi Delta (i.e., lower Mississippi alluvial plain). Water bodies were categorized according to land use and implementation of agricultural best management practices (BMPs). Sediment samples were collected at three sites within each water body from June to July 2004 and analyzed for 17 current and historic-use pesticides and metabolites. Twenty-eight day H. azteca survival and growth were measured to assess the degree of biological impairment. No significant (P > 0.05) mortality occurred in animals exposed to sediments. Significant growth impairment was observed in sediments from all three 303(d) listed water bodies and two of three BMP oxbow lakes. Historic-use pesticides and metabolites were implicated in two of five biologically impaired water bodies. Complex contaminant mixtures often limit attempts to provide clear, definitive sources of biological impairment. In this study, even accounting for sediment characteristics such as sand-silt-clay fractions and organic carbon content did not further clarify sources of toxicity in some water bodies. Finally, results show that implementation of BMPs can mitigate biological impairment within lake sediments.
Facial Recognition techniques applied to the automated registration of patients in the emergency treatment of head injuries

This paper describes the development of a registration framework for image-guided solutions to the automation of certain routine neurosurgical procedures. The registration process aligns the pose of the patient in the preoperative space to that of the intra-operative space. CT images are used in the pre-operative (planning) stage, whilst white light (TV camera) images are used to capture the intra-operative pose. Craniofacial landmarks, rather than artificial markers, are used as the registration basis for the alignment. To further synergy between the user and the image-guided system, automated methods for extraction of these landmarks have been developed. The results obtained from the application of a Polynomial Neural Network (PNN) classifier based on Gabor features for the detection and localisation of the selected craniofacial landmarks, namely the ear tragus and eye corners in the white light modality are presented. The robustness of the classifier to variations in intensity and noise is analysed. The results show that such a classifier gives good performance for the extraction of craniofacial landmarks.