cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.6235394.v1
title: Constructions in Plane Euclidean Geometry: the Perspectives Opened by Didactic Strategies with Technologies

description: Abstract The study presented in this article is linked to a qualitative research carried out with a group of primary school students, whose main purpose was to study the processes of knowledge construction in Euclidean plane geometry, considering, as main subject, the Pythagorean theorem. The research is based on the proposition of problematized activities in a didactic strategy that predicted the work with geometric constructions and the use of a version of the Logo software, in order to observe how and in what form this process is established in a significant way, and the way in which the fluency in digital technologies influences the construction of conjectures by the subjects. The assumptions derived from the Theory of Didactic Situations were adopted for the analysis, together with the Theory of Significant Learning, and influenced the construction of didactic sequences, composed of problems, which proposals of resolution were presented by the students. In this sense, it was possible to observe, as results obtained by investigation process, during the resolution trajectories chosen by the subjects, several characteristics of the subjects’ learning, including correct and wrong answers, evidenced by both the use of the software and written proposals in the protocols produced, which allowed, from this convergence, to indicate the main advances observed with the use of the strategy adopted.
DOI: 10.6084/m9.figshare.6235391
title: A novel method to evaluate salivary flow rates of head and neck cancer patients after radiotherapy: a pilot study

description: Abstract Introduction The procedure used to evaluate salivary flow rate is called sialometry. It can be performed through several techniques, but none appears to be really efficient for post-radiotherapy patients. Objective To adequate sialometry tests for head and neck cancer patients submitted to radiotherapy. Methods 22 xerostomic patients post-radiotherapy (total radiation dose ranging from 60 to 70 Gy) were included in this study. Ten patients were evaluated using sialometries originally proposed by the Radiation Therapy Oncology Group and twelve were assessed by our modified methods. Unstimulated and stimulated sialometries were performed and the results were classified according a grading scale and compared between both groups. Results There was no statistically significant difference between the salivary evaluations of both groups (p = 0.4487 and p = 0.5615). Also, most of these rates were classified as very low and low. Conclusion This novel method seems to be suitable for patients submitted to radiotherapy.
DOI: 10.6084/m9.figshare.6235391.v1
title: A novel method to evaluate salivary flow rates of head and neck cancer patients after radiotherapy: a pilot study

description: Abstract Introduction The procedure used to evaluate salivary flow rate is called sialometry. It can be performed through several techniques, but none appears to be really efficient for post-radiotherapy patients. Objective To adequate sialometry tests for head and neck cancer patients submitted to radiotherapy. Methods 22 xerostomic patients post-radiotherapy (total radiation dose ranging from 60 to 70 Gy) were included in this study. Ten patients were evaluated using sialometries originally proposed by the Radiation Therapy Oncology Group and twelve were assessed by our modified methods. Unstimulated and stimulated sialometries were performed and the results were classified according a grading scale and compared between both groups. Results There was no statistically significant difference between the salivary evaluations of both groups (p = 0.4487 and p = 0.5615). Also, most of these rates were classified as very low and low. Conclusion This novel method seems to be suitable for patients submitted to radiotherapy.
DOI: 10.6084/m9.figshare.6235388
title: MANAGERIAL COMPETENCIES: AN ANALYSIS OF CLASSIFICATIONS IN EMPIRICAL STUDIES

description: Abstract This study presents a literature review on managerial competencies (MC) in order to identify the most mentioned classifications of MC in empirical studies (including schemes, models, categorizations, or even the mere identification of MC in a particular locus of research) from 2005 to 2015. Using bibliographic research and content analysis with a posteriori classification, 46 articles were investigated, along with their common and seminal references. It was concluded that the Quinn model was the most recurrent during the period studied as it appeared in 12 studies. Regarding the other 34 articles, the MC categories with a higher incidence were: result oriented (clients, processes, costs, market, products, projects, etc.); ability to work with people and teams (interpersonal relationship, cooperation, etc.); leadership, coordination, and motivation; ability to work in changing environments (innovation and situational adaptability capability); communication; planning; knowledge management; organization and control (resource allocation, mobilization, and monitoring); Attitudes and Values (ethics, initiative, commitment, etc.); and knowledge and technical skills in the field. Inquiries and criticisms were presented for the last two categories. Among several research recommendations, studies should identify the most relevant MC, even generic or transversal ones, in order to facilitate or allow the diagnosis of MC, providing further studies to concentrate on mapping specific competencies of the studied locus of research, as well as the replication of the study to verify the dynamic behavior of MC over time.
DOI: 10.6084/m9.figshare.6235388.v1
title: MANAGERIAL COMPETENCIES: AN ANALYSIS OF CLASSIFICATIONS IN EMPIRICAL STUDIES

description: Abstract This study presents a literature review on managerial competencies (MC) in order to identify the most mentioned classifications of MC in empirical studies (including schemes, models, categorizations, or even the mere identification of MC in a particular locus of research) from 2005 to 2015. Using bibliographic research and content analysis with a posteriori classification, 46 articles were investigated, along with their common and seminal references. It was concluded that the Quinn model was the most recurrent during the period studied as it appeared in 12 studies. Regarding the other 34 articles, the MC categories with a higher incidence were: result oriented (clients, processes, costs, market, products, projects, etc.); ability to work with people and teams (interpersonal relationship, cooperation, etc.); leadership, coordination, and motivation; ability to work in changing environments (innovation and situational adaptability capability); communication; planning; knowledge management; organization and control (resource allocation, mobilization, and monitoring); Attitudes and Values (ethics, initiative, commitment, etc.); and knowledge and technical skills in the field. Inquiries and criticisms were presented for the last two categories. Among several research recommendations, studies should identify the most relevant MC, even generic or transversal ones, in order to facilitate or allow the diagnosis of MC, providing further studies to concentrate on mapping specific competencies of the studied locus of research, as well as the replication of the study to verify the dynamic behavior of MC over time.
DOI: 10.6084/m9.figshare.6235382
title: Analytical Approach for Making Multilayer and Inhomogeneous Structures Invisible Based on Mantle Cloak

description: Abstract We investigate an analytical approach based on transmission line model to design mantle cloak for multilayer and/or inhomogeneous dielectric objects. Our proposed model is verified with different numerical results. The results matched well with each other. Also, the required impedance for making an inhomogeneous material invisible is calculated analytically. Finally, some complex structures are implemented using CST simulator and suitable performance is reached. So, it is proved that mantle cloak is applicable for making complex inhomogeneous materials invisible.
DOI: 10.6084/m9.figshare.6235382.v1
title: Analytical Approach for Making Multilayer and Inhomogeneous Structures Invisible Based on Mantle Cloak

description: Abstract We investigate an analytical approach based on transmission line model to design mantle cloak for multilayer and/or inhomogeneous dielectric objects. Our proposed model is verified with different numerical results. The results matched well with each other. Also, the required impedance for making an inhomogeneous material invisible is calculated analytically. Finally, some complex structures are implemented using CST simulator and suitable performance is reached. So, it is proved that mantle cloak is applicable for making complex inhomogeneous materials invisible.
DOI: 10.6084/m9.figshare.6235379
title: Arithmetic Procedures in Variational Phenomena Problem-Solving

description: Abstract From the mathematical process of elaboration, comparison and practice of procedures, one of the five general mathematics processes according to MEN (1998), we presented in this document, the findings of a research which objective was to characterize some of the difficulties faced by students solving problems involving the variational phenomena. The phenomenological study of the experimental type allowed, through a qualitative methodology, to recognize, regarding the difficulties linked to arithmetic type procedures, that some students entering the Universidad Industrial de Santander (UIS) have difficulty to realize mental calculations putting at stake relations and numerical properties, as well as to use a numerical system suitable to represent the change and the variation of the phenomenon.
DOI: 10.6084/m9.figshare.6235376
title: Post-intensive care outpatient clinic: is it feasible and effective? A literature review

description: ABSTRACT The follow-up of patients who are discharged from intensive care units follows distinct flows in different parts of the world. Outpatient clinics or post-intensive care clinics represent one of the forms of follow-up, with more than 20 years of experience in some countries. Qualitative studies that followed up patients in these outpatient clinics suggest more encouraging results than quantitative studies, demonstrating improvements in intermediate outcomes, such as patient and family satisfaction. More important results, such as mortality and improvement in the quality of life of patients and their families, have not yet been demonstrated. In addition, which patients should be indicated for these outpatient clinics? How long should they be followed up? Can we expect an improvement of clinical outcomes in these followed-up patients? Are outpatient clinics cost-effective? These are only some of the questions that arise from this form of follow-up of the survivors of intensive care units. This article aims to review all aspects relating to the organization and performance of post-intensive care outpatient clinics and to provide an overview of studies that evaluated clinical outcomes related to this practice.
DOI: 10.6084/m9.figshare.6235376.v1
title: Post-intensive care outpatient clinic: is it feasible and effective? A literature review

description: ABSTRACT The follow-up of patients who are discharged from intensive care units follows distinct flows in different parts of the world. Outpatient clinics or post-intensive care clinics represent one of the forms of follow-up, with more than 20 years of experience in some countries. Qualitative studies that followed up patients in these outpatient clinics suggest more encouraging results than quantitative studies, demonstrating improvements in intermediate outcomes, such as patient and family satisfaction. More important results, such as mortality and improvement in the quality of life of patients and their families, have not yet been demonstrated. In addition, which patients should be indicated for these outpatient clinics? How long should they be followed up? Can we expect an improvement of clinical outcomes in these followed-up patients? Are outpatient clinics cost-effective? These are only some of the questions that arise from this form of follow-up of the survivors of intensive care units. This article aims to review all aspects relating to the organization and performance of post-intensive care outpatient clinics and to provide an overview of studies that evaluated clinical outcomes related to this practice.
DOI: 10.6084/m9.figshare.6235373
title: Production of Furan Compounds from Sugarcane Bagasse Using a Catalytic System Containing ZnCl2/HCl or AlCl3/HCl in a Biphasic System

description: In this work, two catalytic systems combining Lewis and Brønsted acids (ZnCl2/HCl and AlCl3/HCl) were applied in a tetrahydrofuran (THF)/NaClaq biphasic system to produce furan compounds from plant polysaccharides. The following cellulosic matrices were applied for this purpose: α-cellulose, microcrystalline cellulose and both native and steam-exploded sugarcane bagasse. The AlCl3/HCl catalytic system afforded the best yields for α-cellulose conversion to furan compounds (hydrolysis followed by dehydration). The highest yields of 5-(hydroxymethyl)-furfural (HMF) and furfural were 44.0 and 92.2% for AlCl3/HCl and 36.5 and 81.4% for ZnCl2/HCl, respectively. Cellulosic materials with lower crystallinity indexes afforded the best performance in hydrolysis followed by dehydration, giving relatively high yields of HMF and furfural. The HMF yields were similar for both native and steam-exploded sugarcane bagasse and the presence of lignin had a negative effect on HMF production. The highest furfural yield from native sugarcane bagasse was 60.6% with AlCl3/HCl catalytic system.
DOI: 10.6084/m9.figshare.6235373.v1
title: Production of Furan Compounds from Sugarcane Bagasse Using a Catalytic System Containing ZnCl2/HCl or AlCl3/HCl in a Biphasic System

description: In this work, two catalytic systems combining Lewis and Brønsted acids (ZnCl2/HCl and AlCl3/HCl) were applied in a tetrahydrofuran (THF)/NaClaq biphasic system to produce furan compounds from plant polysaccharides. The following cellulosic matrices were applied for this purpose: α-cellulose, microcrystalline cellulose and both native and steam-exploded sugarcane bagasse. The AlCl3/HCl catalytic system afforded the best yields for α-cellulose conversion to furan compounds (hydrolysis followed by dehydration). The highest yields of 5-(hydroxymethyl)-furfural (HMF) and furfural were 44.0 and 92.2% for AlCl3/HCl and 36.5 and 81.4% for ZnCl2/HCl, respectively. Cellulosic materials with lower crystallinity indexes afforded the best performance in hydrolysis followed by dehydration, giving relatively high yields of HMF and furfural. The HMF yields were similar for both native and steam-exploded sugarcane bagasse and the presence of lignin had a negative effect on HMF production. The highest furfural yield from native sugarcane bagasse was 60.6% with AlCl3/HCl catalytic system.
DOI: 10.6084/m9.figshare.6235370
title: Long-term psychological outcome after discharge from intensive care

description: ABSTRACT Objective: To investigate the longterm psychological outcome in survivors of critical illness after intensive care unit discharge. Methods: A prospective cohort of survivors admitted to a mixed intensive care unit between January and September 2010 was evaluated six months and five years after hospital discharge. The Dementia Rating Scale-2, the Hospital Anxiety and Depression Scale, the Posttraumatic stress syndrome 14-questions inventory, the Euro Quality of Life 5 Dimensions (EQ-5-D), and the Visual Analogue Scale (EQ VAS) were assessed at both follow-up periods. Results: Of 267 patients, 25 patients were evaluated at 6 months after discharge (62 ± 16 years); 12 (48%) presented cognitive impairment, 6 (24%) anxiety, 4 (16%) depression, and 4 (16%) post-traumatic stress disorder. Among those re-evaluated five years after discharge (n = 17; 65 ± 15 years), the frequency of cognitive impairment dropped from 8 (47%) to 3 (18%) (p = 0.063), due to improvement in these patients over time, and other patients did not acquire any dysfunction after discharge. At five years after discharge, only two patients (12%) reported anxiety, and none had depression or post-traumatic stress disorder. No differences were found between the six-month and five-year follow-ups regarding EQ-5-D and EQ VAS. Conclusion: Survivors do not show a progressive decline in cognitive function or quality of life within five years after intensive care unit discharge. Psychopathological symptoms tend to decrease with time.
DOI: 10.6084/m9.figshare.6235370.v1
title: Long-term psychological outcome after discharge from intensive care

description: ABSTRACT Objective: To investigate the longterm psychological outcome in survivors of critical illness after intensive care unit discharge. Methods: A prospective cohort of survivors admitted to a mixed intensive care unit between January and September 2010 was evaluated six months and five years after hospital discharge. The Dementia Rating Scale-2, the Hospital Anxiety and Depression Scale, the Posttraumatic stress syndrome 14-questions inventory, the Euro Quality of Life 5 Dimensions (EQ-5-D), and the Visual Analogue Scale (EQ VAS) were assessed at both follow-up periods. Results: Of 267 patients, 25 patients were evaluated at 6 months after discharge (62 ± 16 years); 12 (48%) presented cognitive impairment, 6 (24%) anxiety, 4 (16%) depression, and 4 (16%) post-traumatic stress disorder. Among those re-evaluated five years after discharge (n = 17; 65 ± 15 years), the frequency of cognitive impairment dropped from 8 (47%) to 3 (18%) (p = 0.063), due to improvement in these patients over time, and other patients did not acquire any dysfunction after discharge. At five years after discharge, only two patients (12%) reported anxiety, and none had depression or post-traumatic stress disorder. No differences were found between the six-month and five-year follow-ups regarding EQ-5-D and EQ VAS. Conclusion: Survivors do not show a progressive decline in cognitive function or quality of life within five years after intensive care unit discharge. Psychopathological symptoms tend to decrease with time.
DOI: 10.6084/m9.figshare.6235364
title: Extremely high Faraday and Kerr rotations and extraordinary optical transmission in four-layer dielectric-metal strips-dielectric-Bi:YIG planar structure

description: Abstract Faraday and Kerr effects as well as the extraordinary optical transmission in a structure that combines magneto-optical and plasmonic properties are studied. The planar structure consists of four layers, namely, dielectric layer, metal strips, once again dieletric layer and magneto-optic one. The magneto-optical layer is magnetized by a DC magnetic field normal to it. Our numerical analysis shows that the Faraday and Kerr rotations in this structure can be increased by more than two times in comparison with the published results. This is achieved due to high Q-factor resonances in magneto-optic layer.
DOI: 10.6084/m9.figshare.6235364.v1
title: Extremely high Faraday and Kerr rotations and extraordinary optical transmission in four-layer dielectric-metal strips-dielectric-Bi:YIG planar structure

description: Abstract Faraday and Kerr effects as well as the extraordinary optical transmission in a structure that combines magneto-optical and plasmonic properties are studied. The planar structure consists of four layers, namely, dielectric layer, metal strips, once again dieletric layer and magneto-optic one. The magneto-optical layer is magnetized by a DC magnetic field normal to it. Our numerical analysis shows that the Faraday and Kerr rotations in this structure can be increased by more than two times in comparison with the published results. This is achieved due to high Q-factor resonances in magneto-optic layer.
DOI: 10.6084/m9.figshare.6235358
title: Characterization of Switchable Rectangular Ring FSS with Non Coupled Parallel Metallic Strips for Multi Band and Dual Polarized Applications Using WCIP Method

description: Abstract In this paper, a rectangular metallic ring FSS (Frequency Selective Surfaces) with parallel metallic strips for multi band applications are characterized by the WCIP (Wave Concept Iterative Procedure) method. The proposed FSS structures are made of metallic elements that are simultaneously independent in the spatial domain and uncoupled in the spectral domain. Thus the FSS multiband behavior can be achieved only by a building process based on independent metallic elements in both domains. The resonant characteristics of the proposed FSS are determined. The structure shows three resonant frequencies when the incident wave is x-polarized and three resonant frequencies when the source is polarized in the orthogonal direction. A variation in the length of the strips and the rectangular ring allows a fine tuning in the FSS resonant frequencies to give raise to tuned bandwidths. The suppression of a resonant frequency can be insured either by the elimination of the responsible metallic strip or by the insertion of a PIN diode switch. Three FSS structures are manufactured and characterized. The FSS bandwidth can be enhanced in both perpendicular FSS exciting source directions by only varying the strips lengths and the ring dimensions to the corresponding resonant frequencies. A good agreement is obtained when the WCIP results are compared with the simulations of COMSOL Multiphysics software and experiment.
DOI: 10.6084/m9.figshare.6235355
title: Influence of a new method of sterilization on the morphology and physical properties of extracted human teeth

description: Abstract Introduction Sterilization methods adopted in Human Teeth Bank can promote structural changes in enamel and dentin. Thus, the ideal method should combine the antimicrobial efficacy and preservation of the substrate biomechanical properties. Aim Evaluated the morphology and physical properties of enamel and dentin of extracted human teeth, after being submitted to different sterilization methods. Method Sixteen extracted third molars were sectioned in the following tooth regions: mesio-distal, vestibular-lingual and at the cement enamel junction. Forty specimens were selected according to values of microhardness and roughness initials, and distributed in four experimental groups (n = 10/group): Group 1 = Autoclave 121 °C (30 minutes); Group 2 = 2.5% Sodium hypochlorite (07 days); Group 3 = 5.25% Sodium hypochlorite (07 days); Group 4= 30% Acetic Acid (7 days). After sterilization, the microhardness, roughness and morphology of enamel and dentin were evaluated. Data were analyzed by paired t-test, Wilcoxon, Kruskal-Wallis and Analysis of Variance. A significance level of 5% was adopted. Result All sterilization methods altered the microhardness and roughness of the dentine (p &lt;0.05). Regarding to enamel, the microhardness was affected only by Autoclave and 2.5% Sodium hypochlorite treatment (p &lt;0.05). A large aperture of the enamel pores and dentinal tubules was verified in the micrographs. Conclusion The sterilization methods adopted altered the morphology and/or physical properties of enamel and dentine.