Cuidado, autocuidado e cuidado de si: uma compreensão paradigmática para o cuidado de enfermagem

Este artigo tem como objetivo apresentar uma reflexão sobre os conceitos de cuidado, autocuidado e o cuidado de si, estabelecendo suas relações com os paradigmas da totalidade e da simultaneidade. Na primeira parte do texto, contextualiza-se o cuidado nos seus aspectos gerais; na segunda parte aborda-se o cuidado na perspectiva filosófica de Martin Heidegger; na terceira parte explora-se o autocuidado na concepção de Dorothea Orem; na quarta parte discute-se o cuidado de si preconizado por Michael Foucault; e finalmente, na quinta parte, busca-se estabelecer a relação entre os conceitos autocuidado e o cuidado de si, com os paradigmas da totalidade e da simultaneidade. O autocuidado e o cuidado de si estão atrelados ao objetivismo da totalidade, e ao subjetivismo da simultaneidade havendo, para a Enfermagem, a necessidade de se compreender esta herança paradigmática e suas implicações para o cuidado de enfermagem.

Is the PHY layer dead?

This article originates from a panel with the above title, held at IEEE VTC Spring 2009, in which the authors took part. The enthusiastic response it received prompted us to discuss for a wider audience whether research at the physical layer (PHY) is still relevant to the field of wireless communications. Using cellular systems as the axis of our exposition, we exemplify areas where PHY research has indeed hit a performance wall and where any improvements are expected to be marginal. We then discuss whether the research directions taken in the past have always been the right choice and how lessons learned could influence future policy decisions. Several of the raised issues are subsequently discussed in greater details, e.g., the growing divergence between academia and industry. With this argumentation at hand, we identify areas that are either under-developed or likely to be of impact in coming years - hence corroborating the relevance and importance of PHY research.

Comprehensive evaluation of the IEEE 802.15.4 MAC layer performance with retransmissions

Supported by IEEE 802.15.4 standardization activities, embedded networks have been gaining popularity in recent years. The focus of this paper is to quantify the behavior of key networking metrics of IEEE 802.15.4 beacon-enabled nodes under typical operating conditions, with the inclusion of packet retransmissions. We corrected and extended previous analyses by scrutinizing the assumptions on which the prevalent Markovian modeling is generally based. By means of a comparative study, we singled out which of the assumptions impact each of the performance metrics (throughput, delay, power consumption, collision probability, and packet-discard probability). In particular, we showed that - unlike what is usually assumed - the probability that a node senses the channel busy is not constant for all the stages of the backoff procedure and that these differences have a noticeable impact on backoff delay, packet-discard probability, and power consumption. Similarly, we showed that - again contrary to common assumption - the probability of obtaining transmission access to the channel depends on the number of nodes that is simultaneously sensing it. We evidenced that ignoring this dependence has a significant impact on the calculated values of throughput and collision probability. Circumventing these and other assumptions, we rigorously characterize, through a semianalytical approach, the key metrics in a beacon-enabled IEEE 802.15.4 system with retransmissions.

La Macedonia / descritta da Giacomo Cantelli da Vignola suddito, è Geografo del Serenis[si]mo Sig[no]r Duca di Modena ; Fran[cesc]us Donia Mess[anens]is sculp[si]t

Échelle(s) : [1:895 000 environ], Miglia Italiane 30 [= 6,1 cm]

Macedonia Epiro Livadia Albania e Ianna / divise nelle sue parti principali da Giacomo Cantelli da Vignola, su l'Esemplare delle Carte migliori, é sù le più recenti Relazioni, ... ; Fran[cesc]us Donia Messanensis sculp[si]t

Échelle(s) : [1:1 460 500 environ], Scala di Miglia Italiane 60 [= 7,6 cm]

A double layer model of the gas bubble/water interface

Zeta potential is a physico-chemical parameter of particular importance to describe sorption of contaminants at the surface of gas bubbles. Nevertheless, the interpretation of electrophoretic mobilities of gas bubbles is complex. This is due to the specific behavior of the gas at interface and to the excess of electrical charge at interface, which is responsible for surface conductivity. We developed a surface complexation model based on the presence of negative surface sites because the balance of accepting and donating hydrogen bonds is broken at interface. By considering protons adsorbed on these sites followed by a diffuse layer, the electrical potential at the head-end of the diffuse layer is computed and considered to be equal to the zeta potential. The predicted zeta potential values are in very good agreement with the experimental data of H-2 bubbles for a broad range of pH and NaCl concentrations. This implies that the shear plane is located at the head-end of the diffuse layer, contradicting the assumption of the presence of a stagnant diffuse layer at the gas/water interface. Our model also successfully predicts the surface tension of air bubbles in a KCl solution. (c) 2012 Elsevier Inc. All rights reserved.

Ordonnance (du capitaine des chasses de la Varenne des Thuilleries) portant deffences de colporter ny faire colporter aucun gibier et au pâtissiers, rotisseurs, cabaretiers d'en achepter si ce n'est dans les marchez publics à peine de 500 livres d'amende et de confiscation

[Acte. 1726-10-29. Les Thuilleries]

[Archives de la Parole]. , [The Coorg national anthem : Swadēsi priya kirtane] : dialecte Kodagu (i.e.koḍaga), chant / [Sir George Grierson], éd. ; Linguistic survey of India ; Voix parlée, homme

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]]

Multi-layer amniotic membrane (MLAM) transplantation for non traumatic corneal perforations or descemetoceles

Purpose:To describe the indications, the surgical procedure and the clinical outcome of MLAM in the treatment of non traumatic corneal perforations and descemetoceles . Methods:A prospective, non comparative, interventional case series of eight consecutive patients (mean age 59 years old, 6 men and 2 women) with non traumatic corneal perforations or descemetoceles.The surgery consisted in a MLAM transplantation of a cryopreservated human amniotic membrane. The series included: three active herpetic keratitis, one rosacea, one perforation of an hydrops, one cicatricial pemphigoid, one perforation after an abcess in a corneal graft and one perforation after protonbeamtherapy. The clinical outcome included: the follow-up, the integrity of the eye, corneal epithelialization, inflammation and neovascularization, and the integration of the MLAM. Stromal thickness was followed precisely with the slit lamp. A corneal graft was performed at one patient after the MLAM, allowing microscopic investigation of the removed MLAM integrated in the cornea. Results:The mean follow-up was 8.78 months (range 3.57 to 30.17). Amniotic membrane transplantation was successful and reduced inflammation in 7 patients out of 8 ,after one procedure.One patient who presented a large herpetic keratitis epithelial defect with corneal anaesthesia had his MLAM dissolved after two weeks with an aqueous leakage. Epithelium healed within 3 weeks above 7 MLAM and remained stable at 3 months in 7 out of 8 patients. MLAM opacification gradually disappeared over a few months, however, stromal layers filling in the corneal perforations or above the descemetoceles remained stable. Conclusions:MLAM transplantation is a safe, effective and useful technique to cure non traumatic corneal perforations and descemetoceles. It can be performed in emergency despite the presence of an active inflammation or infection. By facilitating epithelialization, reducing inflammation and neovascularization, it allows corneal surface reconstruction in patients with persistent epithelial defects and corneal melting that usually ends in a perforation. For full visual rehabilitation, a delayed penetrating keratoplasty is required.