Logística flexível baseada em AGVs

Tese de mestrado integrado. Engenharia Electrotécnica e de Computadores (Major automação). Faculdade de Engenharia. Universidade do Porto. 201

Saneamento e organização do processo no Código de Processo Civil de 2015

O presente trabalho tem por objeto o saneamento e organização do processo, com um enfoque especial nas disposições do Código de Processo Civil de 2015. O tema é abordado majoritariamente mediante a análise da doutrina nacional, sendo buscada inicialmente a conceituação da fase de saneamento e organização do processo. A seguir, são apresentadas maneiras de classificar o saneamento e organização do processo de acordo com diversos critérios, bem como indicadas as suas funções. Por fim, a monografia busca analisar o tema da estabilidade da decisão de saneamento.The object of the present work is the procedural ordination, with a special focus in the provisions of the Brazilian Civil Procedure Code of 2015. The theme is addressed mainly through the analysis of Brazilian doctrine, being initially sought the definition of procedural ordination. Afterwards, there are presented many ways to classify the procedural ordination according to varied criteria, as well as indicated its functions. At last, the monography seeks to analyze the thema of the stability of the judicial declaration of procedural ordination

Plastic deformation mechanisms of biomedical Co–Cr–Mo alloy single crystals with hexagonal close-packed structure

This is the first report of the successful fabrication of Co–Cr–Mo biomedical alloy single crystals with a hexagonal close-packed (hcp) structure and the resultant clarification of its deformation behavior. The (0001)〈112¯0〉 basal and {11¯00}〈112¯0〉 prismatic slip systems were found to be predominately operative. The critical resolved shear stresses for the basal and prismatic slip systems at ambient temperature are ~ 204 and ~ 272 MPa, respectively, which are much higher than ~ 54 MPa for {111}〈112¯〉 slip in the face-centered cubic (fcc) Co–Cr–Mo phase, quantitatively demonstrating that the hcp phase acts as an effective strengthening phase.Kaita W., Hagihara K., Rocha L., et al. Plastic deformation mechanisms of biomedical Co–Cr–Mo alloy single crystals with hexagonal close-packed structure. Scripta Materialia, 142, 111. https://doi.org/10.1016/j.scriptamat.2017.08.016

Improved tribocorrosion behavior obtained by in-situ precipitation of Ti2C in Ti-Nb alloy

Novel in-situ Ti-based matrix composites (TMCs) were developed through the reactive hot pressing of Ti + NbC powder blends. Due to the chemical reaction that occurred in the solid-state during processing, the produced samples were composed of an Nb-rich β-Ti phase that formed a metallic matrix along with Ti2C as a reinforcing phase. By employing different proportions of Ti:NbC, the phase composition of the alloys was designed to contain different ratios of α-Ti and β-Ti. The present work investigated the corrosion and tribocorrosion behavior of the composites, compared to unreinforced Ti, in a phosphate-buffered solution (PBS) at body temperature. Corrosion tests included potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Tribocorrosion tests were carried out using a ball-on-plate tribometer with sliding performed at open circuit potential (OCP) and under anodic potentiostatic conditions. Results showed that the stabilization of the β phase in the matrix led to a decrease in the hardness. However, the formation of the in-situ reinforcing phase significantly improved the tribocorrosion behavior of the composites due to a load-carrying effect, lowering the corrosion tendency and kinetics under sliding. Furthermore, localized corrosion was not observed at the interface between the reinforcing phase and the matrix.This work was supported by São Paulo Research Foundation (FAPESP), grants #2017/24300-4, #2018/00746-6 and #2019/07953-0. Also, this work was partially supported by Portuguese Foundation for Science and Technology (FCT), Portugal, under UIDB/04436/2020 project

Orientation dependence of the wear resistance in the Co–Cr–Mo single crystal

This is the report clarifying the orientation dependence of the wear behavior of Co–Cr–Mo alloy. The wear resistance of the Co–Cr–Mo alloy with face-centered cubic (fcc) structure was found to be higher on the planes in order of {110}, {001} and {111}. Quantitatively, the wear resistance on {110} is 1.5 times larger than that on {111}. The tendency showed in coincident with the orientation dependence of the surface hardness, as empirically suggested. However, we additionally found in the observation of the worn surface in the fcc-single crystals that the volume fraction of the hexagonal close-packed (hcp)-phase, which was formed as the strain-induced martensite during the wear test, was larger in the same order of the wear resistance. The variation in formation frequency of the hcp-phase during the wear test can be explained by focusing on the Schmid factor along the resultant direction of the applied stress and the friction stress. On the {111} surface where the Schmid factor for the strain-induced ε-martensite formation is small, homogeneous deformation microstructure covered by it was not developed even after long-time wear, resulting in lower wear resistance. The results strongly suggest that not only the hardness, but the distribution of the ε-martensite is important to control the wear behavior of the Co–Cr alloys with the extremely low stacking fault energy, and it can be achieved by the crystal orientation control in the γ-phase.Nakano T., Hagihara K., Ribeiro A.R., et al. Orientation dependence of the wear resistance in the Co–Cr–Mo single crystal. Wear, 478-479, 203758. https://doi.org/10.1016/j.wear.2021.203758

Influência da corrosão no comportamento ao arrancamento de fibras de aço no betão auto-compactável

Quando adicionadas ao betão, a possibilidade de corrosão das fibras de aço , devido à penetração de cloretos e ação da carbonatação, é um parâmetro de durabilidade no betão auto-compactável reforçado com fibras de aço (BACRFA) que requer especial atenção. No BACRFA fendilhado, a corrosão tende a ocorrer nas fibras de aço que atravessam as fissuras, o que pode afetar o seu comportamento à flexão. Deste modo, o estudo do comportamento interfacial fibra/matriz é importante para a compreensão dos efeitos da corrosão das fibras de aço no comportamento mecânico e na durabilidade das estruturas de BACRFA. Com o intuito de avaliar estes efeitos, no presente trabalho desenvolveu-se um ensaio experimental de arrancamento de fibras de aço em BAC fendilhado, sujeitas previamente à ação da corrosão por exposição a um ambiente agressivo de cloretos, sendo a corrosão avaliada por intermédio de técnicas eletroquímicas. Os ensaios eletroquímicos realizados revelaram que a probabilidade de corrosão das fibras de aço num ambiente com cloretos é superior a 90%. No mesmo ambiente, a susceptibilidade para a corros ão das fibras de aço que atravessam uma pseudo-fissura, aumenta com a abertura de fissura provocando um aumento da resistência ao arranque da fibra em BAC fissuradoQREN, número 23024, denominado INOTEC, que envolve a empresa CiviTest e o ISISE/Universidade do Minho. O primeiro autor agradece a bolsa de investigação concedida pelo referido projeto. À Maccaferri e Radmix pelo fornecimento das fibras de aço, à Sika pelo superplastificante, à Secil pelo cimento e à Omya Comital pelo Fíler calcári

Hyperkalemia Accompanies Hemorrhagic Shock and Correlates with Mortality

OBJECTIVE: This study was designed to evaluate the effects of terlipressin versus fluid resuscitation with normal saline, hypertonic saline or hypertonic-hyperoncotic hydroxyethyl starch, on hemodynamics, metabolics, blood loss and short-term survival in hemorrhagic shock. METHOD: Twenty-nine pigs were subjected to severe liver injury and treated 30 min later with either: (1) 2 mg terlipressin in a bolus, (2) placebo-treated controls, (3) 4 mL/kg 7.5% hypertonic NaCl, (4) 4 mL/kg 7.2% hypertonic-hyperoncotic hydroxyethyl starch 200/0.5, or (5) normal saline at three times lost blood volume. RESULTS: The overall mortality rate was 69%. Blood loss was significantly higher in the hypertonic-hyperoncotic hydroxyethyl starch and normal saline groups than in the terlipressin, hypertonic NaCl and placebo-treated controls groups (p<0.005). Hyperkalemia (K>5 mmol/L) before any treatment occurred in 66% of the patients (80% among non-survivors vs. 22% among survivors, p=0.019). Post-resuscitation hyperkalemia occurred in 86.66% of non-survivors vs. 0% of survivors (p<0.001). Hyperkalemia was the first sign of an unsuccessful outcome for the usual resuscitative procedure and was not related to arterial acidemia. Successfully resuscitated animals showed a significant decrease in serum potassium levels relative to the baseline value. CONCLUSION: Hyperkalemia accompanies hemorrhagic shock and, in addition to providing an early sign of the acute ischemic insult severity, may be responsible for cardiac arrest related to hemorrhagic shock

Implementation of a nursing clinical supervision model - SAFECARE model

The actual context, marked by the high cost of health care associated with technological advances, the increase in the workload of health professionals and the aging of the population with multiple chronic diseases. There are concerns raised by health organizations regarding the quality of care, with emphasis on actions aimed to the continuous quality improvement. The effects of clinical supervision on quality of care defined as a target area by the World Health Organization are a key aspect in improving quality. The literature shows that there is no model of nursing clinical supervision capable to respond to the actual context needs. The objective of this exploratory, descriptive and longitudinal study was to implement a contextualized nursing clinical supervision model, SafeCare model, in order to identify the contributions of its implementation in the indicators sensitive to nursing clinical supervision. The study was conducted in the surgery department of a health care institution and the nurses of the surgery department composed the sample. With this article we intend to disseminate the results of the implementation of the SafeCare model and to prove that the implementation of a contextualized Nursing clinical supervision model based on nurses’ needs, SafeCare Model, has contributed to obtaining higher quality and safer care for clients.info:eu-repo/semantics/publishedVersio

Schwannoma maligno dos seios paranasais

Faculdade de Medicina (FMD