cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7045604
title: Predictive Value of Mean Platelet Volume in Saphenous Vein Graft Disease

description: Abstract Objective: To determine whether mean platelet volume (MPV), platelet distribution width (PDW), and platelet count could be used as determinants of mortality following coronary artery bypass graft (CABG) surgery and patency of saphenous vein grafts (SVG). Methods: The records of 128 patients who underwent emergency or elective coronary angiography after CABG surgery, and who died at an early stage were retrospectively reviewed. Patients were divided into three groups as early death, no SVG disease (SVGD), and SVGD group. MPV, PDW, and platelet count were evaluated at different times. Results: MPV was significantly higher in the stenotic group than in the nonstenotic group (9.7±1.8 fl and 8.2±0.9 fl, P&lt;0.05). The postoperative MPV ratio was found to be higher in the stenotic group when compared to the preoperative period (9.6±1.8 fl and 7.8±0.9 fl, P&lt;0.05). MPV values were also found to be higher in patients who died during the early stage than in surviving patients (9.4±1.9 fl and 8.0±1.0 fl, P&lt;0.05). There was no statistically significant difference regarding platelet count and PDW ratios between the early deaths group and surviving patients. An MPV value higher than 10.6 predicted SVGD with 85% sensitivity and 45% specificity; and an MPV higher than 7.9 predicted early death with 80% sensitivity and 68% specificity were observed. Conclusion: MPV may be a useful indicator for the prediction of SVGD and mortality following CABG surgery.
DOI: 10.6084/m9.figshare.7045610.v1
title: Effect of Shell Thickness on Electron and Hole Transmission Probabilities of a ZnSe/ZnS Core- Shell Quantum Dot

description: In this paper we report the effect of shell thickness on transmission probabilities of electrons and holes in the strained configuration of zinc-selenide/zinc-sulphide (ZnSe/ZnS) core-shell quantum dot. The transmission probabilities of electrons/holes were calculated within the frame work of effective mass approximation and quantum mechanical tunneling. In the first attempt, we introduced extra deposit shell thickness of ZnS in the range 0-5nm and calculated its size effects on the transmission of carriers from core to the shell. We observed that quantum dot of small size core show superb characteristics of possible transmissions and the transmission probability of the carriers across the potential barrier can be controlled by varying the shell thickness, which has practical significance for electron transport in quantum dots, electron transfer in bio-sensors and chemo-sensors etc. Moreover, it is also found that for higher values of electron/hole energies (greater than 0.7eV), the transmission probability oscillates, which too has practical significance for quantum oscillators.The study is important from both basic and applied point of view.
DOI: 10.6084/m9.figshare.7045604.v1
title: Predictive Value of Mean Platelet Volume in Saphenous Vein Graft Disease

description: Abstract Objective: To determine whether mean platelet volume (MPV), platelet distribution width (PDW), and platelet count could be used as determinants of mortality following coronary artery bypass graft (CABG) surgery and patency of saphenous vein grafts (SVG). Methods: The records of 128 patients who underwent emergency or elective coronary angiography after CABG surgery, and who died at an early stage were retrospectively reviewed. Patients were divided into three groups as early death, no SVG disease (SVGD), and SVGD group. MPV, PDW, and platelet count were evaluated at different times. Results: MPV was significantly higher in the stenotic group than in the nonstenotic group (9.7±1.8 fl and 8.2±0.9 fl, P&lt;0.05). The postoperative MPV ratio was found to be higher in the stenotic group when compared to the preoperative period (9.6±1.8 fl and 7.8±0.9 fl, P&lt;0.05). MPV values were also found to be higher in patients who died during the early stage than in surviving patients (9.4±1.9 fl and 8.0±1.0 fl, P&lt;0.05). There was no statistically significant difference regarding platelet count and PDW ratios between the early deaths group and surviving patients. An MPV value higher than 10.6 predicted SVGD with 85% sensitivity and 45% specificity; and an MPV higher than 7.9 predicted early death with 80% sensitivity and 68% specificity were observed. Conclusion: MPV may be a useful indicator for the prediction of SVGD and mortality following CABG surgery.
DOI: 10.6084/m9.figshare.7045598
title: Mortality related to alcohol consumption and its impact on life expectancy of the Argentinian Northwestern population, 2011

description: Abstract Out of the deaths that occurred in 2012 worldwide, 5.9% were caused by harmful consumption of alcohol (WHO, 2014). In Argentina, during 2008 there were 11,013 deaths attributed to alcohol consumption (3.6% of total deaths in population) (ACOSTA, BERTONE e PELÁEZ, 2012). Alcohol consumption per capita by people aged 15 and over in Argentina remained at around 9.5 liters of pure alcohol (equivalent to 25 grams of alcohol per day), considering average figures for the years 2003-2005 and 2008-2010 (WHO, 2014). This quantitative, descriptive and cross-sectional study aims to analyze mortality attributable to alcohol consumption in the provinces of the Argentinian Northwest in 2011, and how this affects life expectancy of these populations. The methodologies proposed by the CDC (1990) - Mortality Attributable to Alcohol Consumption (MACA) and Years of Lost Life Expectancy (AEVP) have been applied (ARRIAGA, 1996). Data provided by DEIS (vital statistics) and INDEC (EnPreCoSP-2011 and population projections) have been used. This article seeks to provide updated information on the status of mortality attributable to alcohol consumption, which is a contribution to public health in order to assess the implementation of appropriate strategies.
DOI: 10.6084/m9.figshare.7045592
title: Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

description: Abstract: The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment interaction. The phenotypic index of seed vigor is effective to rank genotypes considering multi-trait selection related to the vigor of wheat seeds produced in Southern Brazil.
DOI: 10.6084/m9.figshare.7045598.v1
title: Mortality related to alcohol consumption and its impact on life expectancy of the Argentinian Northwestern population, 2011

description: Abstract Out of the deaths that occurred in 2012 worldwide, 5.9% were caused by harmful consumption of alcohol (WHO, 2014). In Argentina, during 2008 there were 11,013 deaths attributed to alcohol consumption (3.6% of total deaths in population) (ACOSTA, BERTONE e PELÁEZ, 2012). Alcohol consumption per capita by people aged 15 and over in Argentina remained at around 9.5 liters of pure alcohol (equivalent to 25 grams of alcohol per day), considering average figures for the years 2003-2005 and 2008-2010 (WHO, 2014). This quantitative, descriptive and cross-sectional study aims to analyze mortality attributable to alcohol consumption in the provinces of the Argentinian Northwest in 2011, and how this affects life expectancy of these populations. The methodologies proposed by the CDC (1990) - Mortality Attributable to Alcohol Consumption (MACA) and Years of Lost Life Expectancy (AEVP) have been applied (ARRIAGA, 1996). Data provided by DEIS (vital statistics) and INDEC (EnPreCoSP-2011 and population projections) have been used. This article seeks to provide updated information on the status of mortality attributable to alcohol consumption, which is a contribution to public health in order to assess the implementation of appropriate strategies.
DOI: 10.6084/m9.figshare.7045592.v1
title: Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

description: Abstract: The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment interaction. The phenotypic index of seed vigor is effective to rank genotypes considering multi-trait selection related to the vigor of wheat seeds produced in Southern Brazil.
DOI: 10.6084/m9.figshare.7045586
title: Agronomic performance and genetic divergence between genotypes of Manihot esculenta

description: Abstract The morphoagronomic characterization of 12 genotypes of M. esculenta was performed during the 2013/2014 and 2014/2015 crop years. The 12 genotypes were planted in a randomized block design, with four replicates per genotype. Number of tuberous roots per plant, weight of tuberous roots, root yield, total plant weight, harvest index, plant height, height of first branch, number of shoots, stem diameter, number of buds, leaf dry weight and petiole length were evaluated. Genotypes “Camuquem” and “Goiás” were the most productive, and “Amarela” and “Gema de Ovo” were the most divergent. Seventy percent of genetic diversity was due to petiole length (22.86%), root yield (19.20%), weight of tuberous roots (14.89%) and number of buds (13.72%). Overall, the present results indicate a broad genetic basis for the evaluated genotypes, so that such genetic variation benefits the plant breeding for future scenarios Further studies of the evaluated genotypes should be performed under environmental limitations, using biochemical and molecular tools to identify markers for genetic improvement.
DOI: 10.6084/m9.figshare.7045586.v1
title: Agronomic performance and genetic divergence between genotypes of Manihot esculenta

description: Abstract The morphoagronomic characterization of 12 genotypes of M. esculenta was performed during the 2013/2014 and 2014/2015 crop years. The 12 genotypes were planted in a randomized block design, with four replicates per genotype. Number of tuberous roots per plant, weight of tuberous roots, root yield, total plant weight, harvest index, plant height, height of first branch, number of shoots, stem diameter, number of buds, leaf dry weight and petiole length were evaluated. Genotypes “Camuquem” and “Goiás” were the most productive, and “Amarela” and “Gema de Ovo” were the most divergent. Seventy percent of genetic diversity was due to petiole length (22.86%), root yield (19.20%), weight of tuberous roots (14.89%) and number of buds (13.72%). Overall, the present results indicate a broad genetic basis for the evaluated genotypes, so that such genetic variation benefits the plant breeding for future scenarios Further studies of the evaluated genotypes should be performed under environmental limitations, using biochemical and molecular tools to identify markers for genetic improvement.
DOI: 10.6084/m9.figshare.7045580
title: STUDENT RETENTION MANAGEMENT IN ONLINE COURSES UNDER THE PERSPECTIVE OF THE ACCEPTANCE OF TECHNOLOGY

description: ABSTRACT Student retention rates in online courses are admittedly low. This article aims to evaluate the relationship between factors of acceptance of technology and the retention of students in online courses. The UTAUT Theory and the DeLone McLean Model serve as a basis for the study. The research is descriptive, with quantitative approach and analysis by the modeling technique of structural equations. Six hypotheses were developed relating technological factors to retention and students of free accounting courses were investigated. The results indicate that the relationship between information quality and retention is the most relevant among those surveyed, followed by hedonic motivation and self-efficacy. These findings contribute to the understanding of managers that retention can be obtained especially from investments in the quality of content, systems with agreeable and pleasant environments of use and capabilities that make users confident in using the system.
DOI: 10.6084/m9.figshare.7045580.v1
title: STUDENT RETENTION MANAGEMENT IN ONLINE COURSES UNDER THE PERSPECTIVE OF THE ACCEPTANCE OF TECHNOLOGY

description: ABSTRACT Student retention rates in online courses are admittedly low. This article aims to evaluate the relationship between factors of acceptance of technology and the retention of students in online courses. The UTAUT Theory and the DeLone McLean Model serve as a basis for the study. The research is descriptive, with quantitative approach and analysis by the modeling technique of structural equations. Six hypotheses were developed relating technological factors to retention and students of free accounting courses were investigated. The results indicate that the relationship between information quality and retention is the most relevant among those surveyed, followed by hedonic motivation and self-efficacy. These findings contribute to the understanding of managers that retention can be obtained especially from investments in the quality of content, systems with agreeable and pleasant environments of use and capabilities that make users confident in using the system.
DOI: 10.6084/m9.figshare.7045577
title: Teacher employment contracts and student performance

description: ABSTRACT This article examines the association between teachers’ work conditions and student’s performance as measured by large-scale tests in the São Paulo State school network. Based on official documents and on a not-yet-explored dataset provided by the State Education bureau, first we address how teachers’ employment contracts signal work conditions. Second, we attempt to list the more prevalent types of contracts in the different regional boards of education and to show the link between contract types and student performance, thus revealing the segmented structure of the São Paulo State school network. Finally, theoretical and policy-related implications of these findings are discussed.
DOI: 10.6084/m9.figshare.7045571
title: Preventive Effect of Preoperative Vitamin D Supplementation on Postoperative Atrial Fibrillation

description: Abstract Objective: To assess the relationship between preoperative vitamin D (vitD) supplementation and the development of postoperative atrial fibrillation (POAF). Methods: The study group consisted of 328 consecutive patients. The ınfluence of preoperative vitD supplementation on POAF was reviewed in 136 patients who underwent coronary artery bypass graft surgery with vitD insufficiency (n=80) and vitD deficiency (n=56). Patients were assigned to receive either oral vitD (50.000 U) (treatment group, n=68) or not (control group, n=68) 48 hours before surgery. Patients were followed up during hospitalisation process with respect to POAF. Results: There was no significant difference between treatment and control groups with regards to age, gender, diabetes mellitus, smoking history, chronic obstructive pulmonary disease, left atrial diameter, and biochemical parameters. Also, there was no significant difference between these groups with regards to mean vitD level on both insufficiency and deficiency patients (24.6±3.7 vs. 24.9±3.9 ng/ml P=0.837, 11.4±4.9 vs. 10.9±5.2 ng/ml P=0.681, respectively). Although the occurrence of POAF was not significantly different among treatment and control groups in patients with vitD insufficiency (31% vs. 33% P=0.538), there was a significant difference between the two groups regarding to POAF in patients with vitD deficiency (18% vs. 29% P=0.02). Conclusion: Although preoperative vitD supplementation was not found to be associated with prevention of POAF in patients with vitD insufficiency, it was found to be strongly associated with prevention of POAF in those with vitD deficiency.
DOI: 10.6084/m9.figshare.7045577.v1
title: Teacher employment contracts and student performance

description: ABSTRACT This article examines the association between teachers’ work conditions and student’s performance as measured by large-scale tests in the São Paulo State school network. Based on official documents and on a not-yet-explored dataset provided by the State Education bureau, first we address how teachers’ employment contracts signal work conditions. Second, we attempt to list the more prevalent types of contracts in the different regional boards of education and to show the link between contract types and student performance, thus revealing the segmented structure of the São Paulo State school network. Finally, theoretical and policy-related implications of these findings are discussed.
DOI: 10.6084/m9.figshare.7045571.v1
title: Preventive Effect of Preoperative Vitamin D Supplementation on Postoperative Atrial Fibrillation

description: Abstract Objective: To assess the relationship between preoperative vitamin D (vitD) supplementation and the development of postoperative atrial fibrillation (POAF). Methods: The study group consisted of 328 consecutive patients. The ınfluence of preoperative vitD supplementation on POAF was reviewed in 136 patients who underwent coronary artery bypass graft surgery with vitD insufficiency (n=80) and vitD deficiency (n=56). Patients were assigned to receive either oral vitD (50.000 U) (treatment group, n=68) or not (control group, n=68) 48 hours before surgery. Patients were followed up during hospitalisation process with respect to POAF. Results: There was no significant difference between treatment and control groups with regards to age, gender, diabetes mellitus, smoking history, chronic obstructive pulmonary disease, left atrial diameter, and biochemical parameters. Also, there was no significant difference between these groups with regards to mean vitD level on both insufficiency and deficiency patients (24.6±3.7 vs. 24.9±3.9 ng/ml P=0.837, 11.4±4.9 vs. 10.9±5.2 ng/ml P=0.681, respectively). Although the occurrence of POAF was not significantly different among treatment and control groups in patients with vitD insufficiency (31% vs. 33% P=0.538), there was a significant difference between the two groups regarding to POAF in patients with vitD deficiency (18% vs. 29% P=0.02). Conclusion: Although preoperative vitD supplementation was not found to be associated with prevention of POAF in patients with vitD insufficiency, it was found to be strongly associated with prevention of POAF in those with vitD deficiency.
DOI: 10.6084/m9.figshare.7045562
title: Cryptogenic Acute Ischemic Stroke: Assessment of the Performance of a New Continuous Long-Term Monitoring System in the Detection of Atrial Fibrillation

description: Abstract Background: Long-term monitoring has been advocated to enhance the detection of atrial fibrillation (AF) in patients with stroke. Objective: To evaluate the performance of a new ambulatory monitoring system with mobile data transmission (PoIP) compared with 24-hour Holter. We also aimed to evaluate the incidence of arrhythmias in patients with and without stroke or transient ischemic attack. Methods: Consecutive patients with and without stroke or TIA, without AF, were matched by propensity score. Participants underwent 24-hour Holter and 7-day PoIP monitoring. Results: We selected 52 of 84 patients (26 with stroke or TIA and 26 controls). Connection and recording times were 156.5 ± 22.5 and 148.8 ± 20.8 hours, with a signal loss of 6,8% and 11,4%, respectively. Connection time was longer in ambulatory (164.3 ± 15.8 h) than in hospitalized patients (148.8 ± 25.6 h) (p = 0.02), while recording time did not differ between them (153.7 ± 16.9 and 143.0 ± 23.3 h). AF episodes were detected in 1 patient with stroke by Holter, and in 7 individuals (1 control and 6 strokes) by PoIP. There was no difference in the incidence of arrhythmias between the groups. Conclusions: Holter and PoIP performed equally well in the first 24 hours. Data transmission loss (4.5%) occurred by a mismatch between signal transmission (2.5G) and signal reception (3G) protocols in cell phone towers (3G). The incidence of arrhythmias was not different between stroke/TIA and control groups.
DOI: 10.6084/m9.figshare.7045559
title: Satisfaction of Emergency Physicians with the Care Provided to Patients with Cardiovascular Diseases in the Northern Region of Minas Gerais

description: Abstract Background: The dissatisfaction of health professionals in emergency services has a negative influence on both the quality of care provided for acute myocardial infarction (AMI) patients and the retention of those professionals. Objective: To assess physicians’ satisfaction with the structure of care and diagnosis at the emergency services in the Northern Region of Minas Gerais before the implementation of the AMI system of care. Methods: This cross-sectional study included physicians from the emergency units of the ambulance service (SAMU) and level II, III and IV regional hospitals. Satisfaction was assessed by using the CARDIOSATIS-Team scale. The median score for each item, the overall scale and the domains were calculated and then compared by groups using the non-parametric Mann-Whitney test. Correlation between time since graduation and satisfaction level was assessed using Spearman correlation. A p value &lt; 0.05 was considered significant. Results: Of the 137 physicians included in the study, 46% worked at SAMU. Most of the interviewees showed overall dissatisfaction with the structure of care, and the median score for the overall scale was 2.0 [interquartile range (IQR) 2.0-4.0]. Most SAMU physicians expressed their dissatisfaction with the care provided (54%), the structure for managing cardiovascular diseases (52%), and the technology available for diagnosis (54%). The evaluation of the overall satisfaction evidenced that the dissatisfaction of SAMU physicians was lower when compared to that of hospital emergency physicians. Level III/IV hospital physicians expressed greater overall satisfaction when compared to level II hospital physicians. Conclusion: This study showed the overall dissatisfaction of the emergency physicians in the region assessed with the structure of care for cardiovascular emergencies.