cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9697040
title: Fragmentation model for the tensile response of unidirectional composites based on the critical number of fiber breaks and the correction of the fiber-matrix interfacial strength.

description: Abstract A fragmentation model based on global load sharing (GLS) theory is developed to obtain stress-strain curves that describe the mechanical behavior of unidirectional composites. The model is named C N B + τ * because it is based on the Critical Number of Breaks model (CNB) and on the correction of the fiber matrix interfacial strength, τ *. Model allows both obtaining the ultimate tensile strength of CFRP and GFRP composites, and correcting the σ vs ε curve to match its peak point with the predicted strength, which is more accurate than the one obtained by previous GLS-based models. Our model is used to classify the mechanical response of the material according to the energetic contributions of two phenomena up to the failure: intact fibers (IF) and fragmentation (FM). Additionally, the influence of fiber content, V f, on the tensile strength, σ U, failure strain, ε U, and total strain energy, U T, is analyzed by means of novel mechanical-performance maps obtained by the model. The maps show a dissimilar behavior of σ U, ε U and U T with V f between GFRP and CFRP composites. The low influence of V f on the percent energetic contributions of IF and FM zones, as well as the larger energetic contribution of the FM zone, are common conclusions that can be addressed for both kinds of composites.
DOI: 10.6084/m9.figshare.9697043
title: Factors related to impaired comfort in chronic kidney disease patients on hemodialysis

description: ABSTRACT Objective: to analyze the factors related to the impaired comfort of chronic kidney diseases (CKD) patients on hemodialysis. Method: this is a cross-sectional study with 80 patients undergoing hemodialysis in a renal replacement therapy unit through interviews using two instruments, one for clinical and sociodemographic characteristics and the General Comfort Questionnaire, during the hemodialysis session. Mann-Whitney tests and the logistic regression model were used for data analysis. Results: the study found that being younger (p=0.045); being married (p=0.05); and absence of impaired physical mobility (p=0.007) were contributing factors for greater comfort in CKD patients on hemodialysis. Thus, when establishing the odds ratio, it was possible to observe that being 55 years of age or older, being single and having impaired physical mobility represents a 45.7% chance of developing this diagnosis. Conclusions: sociodemographic and clinical variables contribute to the study outcome, demanding attention during the planning of nursing interventions.
DOI: 10.6084/m9.figshare.9697058.v1
title: A Regional Legacy Soil Dataset for Prediction of Sand and Clay Content with Vis-Nir-Swir, in Southern Brazil

description: ABSTRACT The success of soil prediction by VIS-NIR-SWIR spectroscopy has led to considerable investment in large soil spectral libraries. The aims of this study were 1) to develop a soil VIS-NIR-SWIR spectroscopy approach using legacy soil samples to improve spectral soil information in a regional scale; (2) to compare six spectral preprocessing techniques; and (3) to compare the performance of linear and non-linear multivariate models for prediction of sand and clay content. A total of 1,534 legacy soil samples, stored by Epagri, were collected from agricultural areas in 2009 on a regional scale, covering 260 municipalities of Santa Catarina. Six spectral preprocessing techniques were applied and compared with reflectance spectra (control treatment) in the development of sand and clay prediction models. Five multivariate regression models, Support Vector Machines, Gaussian Process Regression, Cubist, Random Forest, and Partial Least Square Regression were compared. The scatter-corrective preprocessing groups produced similar or better performance than spectral-derivatives. In addition, preprocessing spectra prior to regression analysis does not improve sand prediction, since reflectance spectra achieved the best performance using Cubist, SVM, and PLS models. In general, clay content presented better prediction accuracy than sand content. The best multivariate model to predict sand and clay content from soil VIS-NIR-SWIR spectra was Cubist. The best Cubist performance was achieved combined with reflectance spectra (R2 = 0.73; root mean square error = 10.60 %; ratio of the performance to the interquartile range = 2.36) and MSC (R2 = 0.83; root mean square error = 7.29 %; ratio of the performance to the interquartile range = 3.70) for sand and clay content, respectively. Considering the mean RMSE values of the validation set, the predictive ability of the multivariate models decreased in the following order: Cubist&gt;PLS&gt;RF&gt;GPR&gt;SVM for both properties. The predictive ability of VIS-NIR-SWIR reflectance spectroscopy achieved in this study for sand and clay content using legacy soil data and heterogeneous samples confirmed the potential of the spectroscopy approach.
DOI: 10.6084/m9.figshare.9697034
title: Some Aspects of Numerical Modeling of Steel-Concrete Composite Beams with Prestressed Tendons

description: Abstract Aspects about the numerical modeling of three-dimensional prestressed steel-concrete composite beams by using the finite element (FE) method are highlighted and commented in this work. Emphasis is given to the numerical treatment of bonded and unbonded tendons. The proposed modeling technique uses curved beam and catenary elements for simulating internal and external tendons, respectively. Other issues such as the constitutive model for shear connectors, steel beam and concrete are also discussed. Several numerical examples with experimental and numerical results are presented. It is encountered that a faster numerical convergence is achieved when the tendon stiffness is included in the overall stiffness of the structure, even when the unbonded internal situation is addressed. Moreover, omitting slipping at the deviator device may lead to inaccurate results in the evaluation of tendon forces for external prestressing. Favourable agreement is encountered for all studied examples.
DOI: 10.6084/m9.figshare.9697037.v1
title: Dynamic Response Analysis of Geogrid Reinforced Embankment Supported by CFG Pile Structure During a High-Speed Train Operation

description: Abstract The performance of railroad structure has a tremendous influence on the safety and stable operation of high-speed trains. Strong vibrations and the degradation rate of the track are the main factors affecting the transport safety of a railroad built over a weak soil. Geogrid reinforced embankment supported by pile structure is a new efficient construction technique used to ensure the stability and enhance the performance of the railroad system; but only a few studies are oriented to its behavior under train operation. This paper investigates the dynamic response of geogrid reinforced embankment supported by cement fly-ash gravel pile structure during a high-speed train operation. The establishment of a realistic simulation model for railroad subjected to a moving train load, is an important first step towards the reliable design of geogrid reinforced embankment supported by pile structure. Thus, a 3D nonlinear FEM has been established to simulate the instrumented Harbin-Dalian railway test section. Each train carriage was modeled as a transient dynamic load through a user-defined Dload subroutine. The developed model was successfully validated by the dynamic response recorded from the field test section. The improvement of the railroad structure by the CFG piles and geogrids contributed significantly to the reduction of the vibration in the structure, which attenuates 1.2 times faster with the structure depth, even under overload conditions. Moreover, the phenomenon of resonance observed when the train reaches speeds of 100 and 260 km/h were annihilated. The analysis of the stress distribution within the embankment revealed that a dynamic arch is formed in the embankment at 2 m from the ground. The stress onto the pile was 16 times greater than that acted on the soil and the tensile stress developed in the geogrid was high at the piles edge below. In addition, the coupling effect of geogrid with various tensile strengths and the piles with different strength grades indicated that the combination of a high-strength pile and geogrid significantly reduces the displacement gap due to the variation of train speed. As a result, the vibrations of the track were almost constant during the train operation; thus, ensuring comfort to passengers and reducing the risk of derailment.
DOI: 10.6084/m9.figshare.9697040.v1
title: Fragmentation model for the tensile response of unidirectional composites based on the critical number of fiber breaks and the correction of the fiber-matrix interfacial strength.

description: Abstract A fragmentation model based on global load sharing (GLS) theory is developed to obtain stress-strain curves that describe the mechanical behavior of unidirectional composites. The model is named C N B + τ * because it is based on the Critical Number of Breaks model (CNB) and on the correction of the fiber matrix interfacial strength, τ *. Model allows both obtaining the ultimate tensile strength of CFRP and GFRP composites, and correcting the σ vs ε curve to match its peak point with the predicted strength, which is more accurate than the one obtained by previous GLS-based models. Our model is used to classify the mechanical response of the material according to the energetic contributions of two phenomena up to the failure: intact fibers (IF) and fragmentation (FM). Additionally, the influence of fiber content, V f, on the tensile strength, σ U, failure strain, ε U, and total strain energy, U T, is analyzed by means of novel mechanical-performance maps obtained by the model. The maps show a dissimilar behavior of σ U, ε U and U T with V f between GFRP and CFRP composites. The low influence of V f on the percent energetic contributions of IF and FM zones, as well as the larger energetic contribution of the FM zone, are common conclusions that can be addressed for both kinds of composites.
DOI: 10.6084/m9.figshare.9697043.v1
title: Factors related to impaired comfort in chronic kidney disease patients on hemodialysis

description: ABSTRACT Objective: to analyze the factors related to the impaired comfort of chronic kidney diseases (CKD) patients on hemodialysis. Method: this is a cross-sectional study with 80 patients undergoing hemodialysis in a renal replacement therapy unit through interviews using two instruments, one for clinical and sociodemographic characteristics and the General Comfort Questionnaire, during the hemodialysis session. Mann-Whitney tests and the logistic regression model were used for data analysis. Results: the study found that being younger (p=0.045); being married (p=0.05); and absence of impaired physical mobility (p=0.007) were contributing factors for greater comfort in CKD patients on hemodialysis. Thus, when establishing the odds ratio, it was possible to observe that being 55 years of age or older, being single and having impaired physical mobility represents a 45.7% chance of developing this diagnosis. Conclusions: sociodemographic and clinical variables contribute to the study outcome, demanding attention during the planning of nursing interventions.
DOI: 10.6084/m9.figshare.9697031
title: Hygro-thermo-mechanical bending of FG piezoelectric plates using quasi-3D shear and normal deformations theory

description: Abstract A simple quasi-3D sinusoidal shear and normal deformations theory for the hygro-thermo-mechanical bending of functionally graded piezoelectric (FGP) plate is developed under simply-supported edge conditions. The governing equations are deduced based on the principle of virtual work. The exact solutions for FGP plate are obtained. The current study investigates the effect of some parameters, like piezoelectricity, hygrothermal parameter, gradient index and electric loading on the mechanical and electric displacements, electric potential and stresses. They are explored analytically and numerically presented and discussed in detail. The numerical results clearly show the effect of piezoelectric and hygrothermal parameter on the FGP plate.
DOI: 10.6084/m9.figshare.9697034.v1
title: Some Aspects of Numerical Modeling of Steel-Concrete Composite Beams with Prestressed Tendons

description: Abstract Aspects about the numerical modeling of three-dimensional prestressed steel-concrete composite beams by using the finite element (FE) method are highlighted and commented in this work. Emphasis is given to the numerical treatment of bonded and unbonded tendons. The proposed modeling technique uses curved beam and catenary elements for simulating internal and external tendons, respectively. Other issues such as the constitutive model for shear connectors, steel beam and concrete are also discussed. Several numerical examples with experimental and numerical results are presented. It is encountered that a faster numerical convergence is achieved when the tendon stiffness is included in the overall stiffness of the structure, even when the unbonded internal situation is addressed. Moreover, omitting slipping at the deviator device may lead to inaccurate results in the evaluation of tendon forces for external prestressing. Favourable agreement is encountered for all studied examples.
DOI: 10.6084/m9.figshare.9697022
title: Nurses- puerperal mothers interaction: searching for cultural care

description: ABSTRACT Objective: To identify the importance of the cultural care dimension in the nurse-puerperal mother interaction. Method: Qualitative study based on content analysis. To collect data, 36 semi structured interviews were applied (21 nurses and 15 women who had recently given birth). The participants’ free and informed consent was ensured and all ethical requirements were respected. Data analysis was supported by NVivo 10 software. Results: The following categories were considered the most relevant: (i) nurses’ attitudes that puerperal mothers consider crucial in health care provision; (ii) nurses’ cultural competence; (iii) language resources used by nurses in their interaction with people from other cultures; (iv) the limitations that were observed during nurses-new mothers interactions. Conclusion: Evidence shows that, generally speaking, nurses claim to provide personalized health care assistance. However data revealed that the kind of interaction observed between nurses and women who had just given birth has not always been the most effective and that the former often show they lacked the appropriate cultural competence to deal with the latter’s expectations and needs.
DOI: 10.6084/m9.figshare.9697028
title: Development of research on nursing diagnoses in Brazilian graduate programs

description: ABSTRACT Objective: to characterize the development of research on nursing diagnoses in nursing graduate programs and verify the application of the results of these studies according to the perception of academic advisors. Methods: documental research on dissertations and theses available from the databases of Brazilian universities with graduate programs in nursing, and exploratory survey on the practical application of their results. Results: 216 dissertations and theses were analyzed. Most of them were descriptive studies, and the most widely used diagnostic taxonomy was NANDA International. Little practical use of the knowledge produced by the dissertations and theses was identified. Conclusion: Although there has been a considerable increase in research on nursing diagnoses, the survey stage revealed scarce practical application of their results, prompting the need for further studies in order to identify the barriers in the way of transposing theory to practice.
DOI: 10.6084/m9.figshare.9697028.v1
title: Development of research on nursing diagnoses in Brazilian graduate programs

description: ABSTRACT Objective: to characterize the development of research on nursing diagnoses in nursing graduate programs and verify the application of the results of these studies according to the perception of academic advisors. Methods: documental research on dissertations and theses available from the databases of Brazilian universities with graduate programs in nursing, and exploratory survey on the practical application of their results. Results: 216 dissertations and theses were analyzed. Most of them were descriptive studies, and the most widely used diagnostic taxonomy was NANDA International. Little practical use of the knowledge produced by the dissertations and theses was identified. Conclusion: Although there has been a considerable increase in research on nursing diagnoses, the survey stage revealed scarce practical application of their results, prompting the need for further studies in order to identify the barriers in the way of transposing theory to practice.
DOI: 10.6084/m9.figshare.9697031.v1
title: Hygro-thermo-mechanical bending of FG piezoelectric plates using quasi-3D shear and normal deformations theory

description: Abstract A simple quasi-3D sinusoidal shear and normal deformations theory for the hygro-thermo-mechanical bending of functionally graded piezoelectric (FGP) plate is developed under simply-supported edge conditions. The governing equations are deduced based on the principle of virtual work. The exact solutions for FGP plate are obtained. The current study investigates the effect of some parameters, like piezoelectricity, hygrothermal parameter, gradient index and electric loading on the mechanical and electric displacements, electric potential and stresses. They are explored analytically and numerically presented and discussed in detail. The numerical results clearly show the effect of piezoelectric and hygrothermal parameter on the FGP plate.
DOI: 10.6084/m9.figshare.9697022.v1
title: Nurses- puerperal mothers interaction: searching for cultural care

description: ABSTRACT Objective: To identify the importance of the cultural care dimension in the nurse-puerperal mother interaction. Method: Qualitative study based on content analysis. To collect data, 36 semi structured interviews were applied (21 nurses and 15 women who had recently given birth). The participants’ free and informed consent was ensured and all ethical requirements were respected. Data analysis was supported by NVivo 10 software. Results: The following categories were considered the most relevant: (i) nurses’ attitudes that puerperal mothers consider crucial in health care provision; (ii) nurses’ cultural competence; (iii) language resources used by nurses in their interaction with people from other cultures; (iv) the limitations that were observed during nurses-new mothers interactions. Conclusion: Evidence shows that, generally speaking, nurses claim to provide personalized health care assistance. However data revealed that the kind of interaction observed between nurses and women who had just given birth has not always been the most effective and that the former often show they lacked the appropriate cultural competence to deal with the latter’s expectations and needs.
DOI: 10.6084/m9.figshare.9697016
title: Dynamic Arrays Based on Magnetically Controlled Particles: Synthesis and Application

description: Growth mechanisms of dynamic granular arrays based on magnetically controlled particles are presented. Method of the external rotating magnetic field (ERMF), based on a dipole interaction of magnetic spherical Fe3O4 particles in highly ordered volume arrays is proposed and a design for its practical implementation is developed. The magnetic assembly can result in permanent structures, which could be disassembled on demand by remote demagnetization. To study the interaction field of particles in the arrays, a mean field theory was used and the data were compared with experiment. Reflection spectra of electromagnetic radiation from a volume dense packed array of Fe3O4 particles with thicknesses of 3 and 6 mm, and a flat particles array with a set of 15 and 30 layers, as well as frequency characteristics of attenuation of electromagnetic radiation of the claimed materials in the frequency range from 8.0 GHz to 12.5 GHz obtained. Presented method and the installation have the prospect of being used in the processes of making composite materials for electromagnetic radiation protection using a wide range of materials of micro and nanoparticles.
DOI: 10.6084/m9.figshare.9697016.v1
title: Dynamic Arrays Based on Magnetically Controlled Particles: Synthesis and Application

description: Growth mechanisms of dynamic granular arrays based on magnetically controlled particles are presented. Method of the external rotating magnetic field (ERMF), based on a dipole interaction of magnetic spherical Fe3O4 particles in highly ordered volume arrays is proposed and a design for its practical implementation is developed. The magnetic assembly can result in permanent structures, which could be disassembled on demand by remote demagnetization. To study the interaction field of particles in the arrays, a mean field theory was used and the data were compared with experiment. Reflection spectra of electromagnetic radiation from a volume dense packed array of Fe3O4 particles with thicknesses of 3 and 6 mm, and a flat particles array with a set of 15 and 30 layers, as well as frequency characteristics of attenuation of electromagnetic radiation of the claimed materials in the frequency range from 8.0 GHz to 12.5 GHz obtained. Presented method and the installation have the prospect of being used in the processes of making composite materials for electromagnetic radiation protection using a wide range of materials of micro and nanoparticles.
DOI: 10.6084/m9.figshare.9697001
title: Psycho social risks noted by oncology workers related to their quality of life

description: ABSTRACT Objective: To analyze the relation between occupational psychosocial risks and quality of life related to health, felt by workers who work in oncology and palliative care units in a region of Chile. Method: Cross-sectional analytical study of quantitative approach, in which 110 health workers participated. Research met the ethical requirements of E. Emanuel. Results: Participants perceive greater exposure to psychosocial risks in the dimension of psychological demands and double presence. On the other hand, they see better results in the physical health component (��: 76.72; SD 9.75) versus the mental health component (��: 71.13; SD 6.38). In addition, there are relations with statistical significance, between psychosocial risks and quality of life related to Health (p≤0.05). Conclusions: This study shows that there the perception of psychosocial risks and quality of life are related, when considering the health of workers.
DOI: 10.6084/m9.figshare.9697004
title: Complete Atrioventricular Block and Cardiopulmonary Involvement in Rapidly Progressive Systemic Sclerosis

description: Abstract The heart and lung are target organs in systemic sclerosis (SSc) and similar symptoms (dyspnea and cough) may make the differential diagnosis between the two lesions difficult. In addition, complete atrioventricular block (CAVB) is a rare complication of this disease. This case report is about a patient with SSc and pulmonary fibrosis who was admitted to the emergency room with CAVB, heart failure (HF) and progressive worsening of the underlying disease.