Numerical Investigation on Flood Water Sloshing Influence on Intact and Damaged Stability of Ship

Sloshing affects the intact and damage stability of the ship, which causes variation in dynamic metacentric height (GM) under critical load conditions. The transient flooding soon after the ship damage is analyzed, with floodwater accumulation in large space and causing the ship to suffer huge heel angles. The ship motion and stability changes when sloshing becomes high in partially flooded compartments. Most of the previous researches focus on the motion response of ship alone, hence the variation of stability due to sloshing is to be more critically studied. In the present study, three critical damage locations are identified and flooding through these locations are analyzed using the volume of fluids method. The method focus on finding damage ship motion response, flood water dynamics, and coupled dynamics of both. This is studied using the numerical method FLOW3D. Motion and stability behaviour will be different for different damage locations; hence portside, starboard-side, and aft-end bottom damage cases are considered. The effect of compartment shape and damage location on motion response and stability of the damaged ship is highlighted.

A common model to explain similarities between injection-induced and natural earthquake swarms

<p>Fluid injections at depth can trigger seismic swarms and aseismic deformations. Similarly, some natural sequences of seismicity occur clustered in time and space, without a distinguishable mainshock. They are usually interpreted as driven by fluid and/or aseismic processes. Those seismic swarms, natural or injection-induced, present similarities in their behavior, such as a seismic front migration. The effective stress drop, defined as a ratio between seismic moment and cluster size, is also weak for all swarms, when compared to usual earthquakes values. However, the physical processes that drive both types of swarms, and that can explain such similarities are still poorly understood. Here, we propose a mechanical model in which the fluid primarily induces an aseismic slip, which then triggers and drives seismicity within and on the edges of the active zone. This model is validated using a global and precise dataset of 16 swarms, from natural or induced origins, in different geological contexts. Consequently, our measurements of the migration velocity of the seismicity front, and of the effective stress drop for our swarms can be related to the seismic-to-aseismic moment. Using our model, we are then able to compute an estimate of the volume of fluids circulating during natural earthquake swarms, assuming the total moment is related to the volume of fluids. Our study highlights common characteristics and novel insights into the physical processes at play during seismic swarms.</p>

Intercorrências Clínicas em Hemodiálise Ambulatorial: Intervenções do Enfermeiro

Os rins têm função vital, pois são responsáveis pela eliminação de toxinas, regulação do volume de líquidos e pela filtragem do sangue (filtram, por minuto, em média 20% do volume sanguíneo bombeado pelo coração). Dessa forma, a função renal é avaliada com base na filtração glomerular (FG) e sua redução é observada na doença renal crônica (DRC), quando ocorre a perda das funções reguladora, excretora e endócrina dos rins. Desequilíbrios esses que podem ser de consequência vascular, por comorbidade secundária, por doença renal secundária a drogas ou agentes tóxicos, infecções urinárias de repetição, doença de próstata, doenças policísticas renal, entre outras. Nas terapias renais substitutivas, a diálise é empregada para remover líquidos e produtos residuais urêmicos do organismo, quando o corpo não consegue mais fazê-lo. Tendo em vista que o procedimento hemodialítico tem complicações potenciais, considera-se vital que o enfermeiro deva estar apto para intervir em tais intercorrências, portanto, ficando evidente a importância deste estudo. Objetiva-se, portanto, descrever as intervenções do enfermeiro em intercorrências clínicas durante a hemodiálise ambulatorial, bem como descrever as principais intercorrências durante as sessões de hemodiálise ambulatorial e se há protocolos específicos de intervenções do enfermeiro em intercorrências com o paciente dialítico. Trata-se de uma pesquisa de revisão integrativa da literatura, pois esta metodologia de revisão tem por propósito realizar uma dada síntese rigorosa de todas as pesquisas encontradas relacionadas a uma questão específica. Palavras-chave: Enfermagem. Hemodiálise. Intercorrências Abstract The kidneys have a vital function, as they are responsible for eliminating toxins, regulating the volume of fluids and filtering the blood (they filter, on average, 20% of the blood volume pumped by the heart per minute). Thus, renal function is assessed based on glomerular filtration (FG) and its reduction is seen in chronic kidney disease (CKD), when the loss of the kidneys regulatory, excretory and endocrine functions occurs. These imbalances can be of vascular consequence, secondary comorbidity, kidney disease secondary to drugs or toxic agents, recurrent urinary infections, prostate disease, polycystic kidney diseases, among others. In renal replacement therapies, dialysis is used to remove uremic fluids and waste products from the body when the body is unable to do so. Bearing in mind that the hemodialysis procedure has potential complications, it is considered nodal that the nurse must be able to intervene in such complications, therefore, the importance of this study is evident. Therefore, the objective is to describe the nurse's interventions in clinical complications during the outpatient hemodialysis, as well as to describe the main complications during the outpatient hemodialysis sessions and if there are specific protocols for the nurse interventions in complications with dialysis patients. It is an integrative literature review research, since this review methodology aims to perform a given rigorous synthesis of all the studies found related to a specific issue. Keywords: Nursing. Hemodialysis. Complications

Hydrogel: An encouraging nanocarrier system for the delivery of Herbal Bioactive Compounds

: Herbal medicine is a significant component of traditional medicine and has been a part of the treatment of many diseases. Asian peoples are using these herbal medicines for decades. Still, the therapeutic efficacy and pharmaceutical application of herbal extracts have obstacle associated by many factors such as poor bioavailability, low solubility, permeability and lack of targeting potential. The Hydrogels are hydrophilic polymeric network and able to permeate a significant volume of fluids. Hydrogels are biologically compatible and can allow for the sustained release of drugs. Hydrogels have thus attracted extensive pharmaceutical formulations studies. The present article first discusses the general overview of the hydrogel as a professional nanocarrier. Secondly, the relations between hydrogel properties and carrier efficiency deliberation has included. In the end, the focus had been on the latest technological progress over hydrogel-based materials as herbal medicines carriers. The potential application of hydrogel systems as a carrier for herbal bioactive delivery has shown remarkable promise. This study would be helpful for researchers in the field to understand the most recent advancement in the production of hydrogel-based elements as a vehicle of herbal drugs delivery.

Terminological subset of the International Classification for Nursing Practice for patients hospitalized due to burns

ABSTRACT Objective: To develop a proposal of a terminological subset of the International Classification for Nursing Practice for burned patients. Method: This is a methodological study following the steps: identification of clinical findings; mapping of terms; construction of statements of diagnoses/results and nursing interventions; content validation of statements; and structuring of the subset with the theoretical model of Basic Human Needs. Content validation was performed by 26 specialist nurses, through the Content Validity Index, with statements ≥ 0.80 being considered validated. Results: A total of 36 diagnoses/results and 119 interventions were validated. Among these, the ones with the highest index were: Respiratory System Function, Impaired/Respiratory System Function, Effective; Volume of Fluids, Impaired/Volume of Fluids, Effective; Burn Wound/Wound Healing, Effective; Pain, Acute/Pain, Absent, and as interventions: To Monitor Vital Signs; to Monitor Fluid Balance; to Treat Skin Condition; to Assess Response to Pain Management (Control). Conclusion: The validated statements depict the burned people basic human needs, with the psychobiological ones being the most prevalent.

An extension of the multiple marker algorithm for study of phase separation problems at the mesoscale

Multiphase fluid flow is an active field of research in numerous branches of science and technology. An interesting subset of multiphase flow problems involves the dispersion of one phase into another in the form of many small bubbles or droplets, and their subsequent separation back into bulk phases after this has occurred. Phase dispersion may be a desirable effect, for example in the production of emulsions of otherwise immiscible liquids or to increase interfacial surface area for chemical reactions, or an undesirable one, for example in the intermixing of waste and product phases during processing or the generation of foams preventing gas-liquid decoupling. The present paper describes a computational fluid dynamics method based on the multiple marker front-capturing algorithm – itself an extension of the volume-of-fluids method for multiphase flow – which is capable of scaling to mesoscale systems involving thousands of droplets or bubbles. The method includes sub-grid models for solution of the Reynolds equation to account for thin film dynamics and rupture. The method is demonstrated with an implementation in the OpenFOAM® computational mechanics framework. Comparisons against empirical data are presented, together with a performance benchmarking study and example applications.

Equilibrium shape of the aqueous humor-vitreous substitute interface in vitrectomized eyes

Purpose: To predict the shape of the interface between aqueous humor and a tamponade, gas or silicone oil (SO), in vitrectomized eyes. To quantify the tamponated retinal surface for various eye shapes, from emmetropic to highly myopic eyes. Methods: We use a mathematical model to determine the equilibrium shape of the interface between the two fluids. The model is based on the VOF (volume of fluids) method. The governing equations are solved numerically using the free software OpenFOAM. We apply the model both to the case of idealized, yet realistic, geometries of emmetropic and myopic eyes and to a real geometry reconstructed from MRI images of the vitreous chamber. Results: The numerical model allows us to compute the equilibrium shape of the interface between the aqueous humor and the tamponade fluid. From this we can compute the portion of the retinal surface that is effectively tamponated by the fluid. We compare the tamponating ability of gases and SOs. We also compare the tamponating effect in emmetropic and myopic eyes by computing both tamponated area and angular coverage. Conclusion: The numerical results show that gases have better tamponating properties than SOs. We also show that, for a given filling ratio the percentage of tamponated retinal surface area is smaller in myopic eyes. The method is valuable for clinical purposes, especially in patients with pathological eye shapes, to predict the area of the retina that will be tamponated for a given amount of injected fluid.