Efecto de diferntes parámetros de represas heterogeneas en el factor de seguridad usando redes neuronales. Caso de estudio. Represa Marvak

The drainage system is used to guide the flow of water in the earth dams. Construction of drainage in the dam body to collect and direct the drainage formed in the dam body to keep the slope dry and prevent the increase of pore water pressure in the body. One of the main goals of the designers is to find the minimum factor of safety and, consequently, reduce the cost of construction. In this study, the Marvak dam is modeled with the actual characteristics of the materials in the Geostudio software, and with the change in the dimensions of the drain, the material and the slope of the dam body, the minimum Factor of safety of the dam is obtained. In order to predict the minimum Factor of safety, a two-layer neural network has been used. With the training of the neural network based on the data obtained from heterogeneous dams, a minimum Factor of safety has been extracted for optimization of drainage. Finally, it was determined that the internal friction angle of the body material and the slope of the dam have the greatest effect on the dam factor of safety.El sistema de drenaje se utiliza para guiar el flujo de agua en las presas de tierra. Construcción de drenaje en el cuerpo de la presa para recoger y dirigir el drenaje formado en el cuerpo de la presa para mantener la pendiente seca y evitar el aumento de la presión de agua de los poros en el cuerpo. Uno de los principales objetivos de los diseñadores es encontrar el factor mínimo de seguridad y, en consecuencia, reducir el costo de la construcción. En este estudio, la presa Marvak se modela con las características reales de los materiales en el software Geostudio, y con el cambio en las dimensiones del drenaje, el material y la pendiente del cuerpo de la presa, el factor mínimo de seguridad de la presa es obtenido. Para predecir el Factor mínimo de seguridad, se ha utilizado una red neuronal de dos capas. Con el entrenamiento de la red neuronal basado en los datos obtenidos de represas heterogéneas, se extrajo un Factor mínimo de seguridad para la optimización del drenaje. Finalmente, se determinó que el ángulo de fricción interna del material del cuerpo y la pendiente de la presa tienen el mayor efecto sobre el factor de seguridad de la presa

Registry Data Coordinator (RDC): A proper accessible strategy for improving Road Traffic Injury (RTI) Hospital Based Trauma Registry Systems in developing countries and low income countries

Abstract Introduction: Evidence suggested that a significant level of trauma mortality can be prevented using registry system. Aim: This study aimed to improve Kashan Hospital Based Trauma Registry System (KHBTRS) for Road Traffic Injury (RTI). Material and methods: After conducting focus group discussion absence of minimum data set (MDS) and poor data collection process (DCP) were identified as main problems for KHBTRS- RTI. Proposed MDS were surveyed by 20 experts of trauma research center of throughout the Iran. Then approved MDS applied for trauma registry system data base in form of SQL. DCP were reform from prospective data collection (review of medical record) to concurrent (through the interview) approach. Results: Most of participants for MDS approval belonged to clinical group 13(65%). 146 MDS in eighteen main categories were proposed for RTI. The maximum score for each MDS main categories were attributed to body parts injured 220 (100%) and patient vital signs 139 (99.29%) respectively. Pilot testing of KHBTRS- RTI database of 50 (50%) riders indicated fully completeness 50 (100%) for concurrent approach. It was concluded that based on experts’ viewpoints MDS relating to injury nature and place of occurrence have more priority in comparisons to MDS relating to causes of injury. It may attribute to health care providers focus on clinical care and treatment. Conclusion: It was concluded that based on experts’ viewpoints MDS relating to injury nature and place of occurrence have more priority in comparisons to MDS relating to RTI prevention; it may attribute to health care providers focus on clinical care and treatment. To develop injury interventions based on given data, recruitment of professionals as registry data coordinator with specific job description to collect and advocacy of injury external causes data seems imperative. Keywords: data collection, registries, trauma, road traffic accident, data completeness, World Health Organizatio

D-concurrence bounds for pair coherent states

The pair coherent state is a state of a two-mode radiation field which is known as a state with non-Gaussian wave function. In this paper, the upper and lower bounds for D-concurrence (a new entanglement measure) have been studied over this state and calculated.Comment: 11 page

Comparing the cardiac MRI and thallium-201 SPECT findings in assessing myocardial viability in patients with ST elevation myocardial infarction

Background and purpose: Viable tissue detection after STEMI can lead to successful revascularization for reversing myocardial dysfunction. The purpose of this study was to compare the Thallium-201 SPECT and MRI findings in viability assessment. Materials and methods: A cross-sectional study was performed on 17 patients with STEMI. In addition to Thallium SPECT, contrast enhanced MRI imaging was done. Viability was determined as more than 50 percent thallium uptake after 4 hours in SPECT and lower than 50 percent gadolinium enhancement after 10 minutes in each segments in CMRI. Results: Two hundred eighty nine segments were studied using both methods. TL SPECT showed 15.6 of the segments as non-viable tissue while MRI showed 35 non-viable tissue. There was a substantial agreement between these methods in apical septal and apical segments (k: 0.653, k: 0.757, respectively). Conclusion: The percentage of non-viable myocardium in MRI was found to be higher than that of Thallium SPECT and also considerable agreement was seen between MRI and Thallium SPECT in determination of myocard viability in apical septal and apex segments. © 2016, Mazandaran University of Medical Sciences. All rights reserved

Evaluating thrombophilia in severe ovarian hyperstimulation syndrome

Background: Ovarian hyper stimulation syndrome (OHSS) and its consequences, especially thromboembolic events, are of the most dangerous complications of assisted reproductive technologies (ART). It is unclear whether a thrombophilic predisposition or changes in blood components during clinical presentation of OHSS increase thrombotic risks. Testing for certain thrombophilias in selected high risk patients may help risk assessment and decision-making about prophylactic measures. Methods: In this study carried out in April 2010 to March 2011, 108 in vitro fertilization candidates with ≥20 follicles following ovarian stimulation were recruited. Protein S, protein C, antithrombin, lupus anticoagulant and anticardiolipin antibodies were measured. Blood tests were compared between severe and non-severe OHSS groups and their changes were traced after onset of clinical OHSS in 43 patients presenting with severe symptoms by repeating the tests at hospital admission. Results: Mean protein S activity was lower in severe OHSS group (101.7±16.3 vs. 118.4±17.0 P<0.001). After clinical presentation of severe OHSS, this level decreased to 91.6±20.1 (P<0.001). Antithrombin levels decreased 2.09% after the onset of symptoms in the group with severe OHSS, but this difference was not statistically significant (P=0.051). Protein C, lupus anticoagulant and anticardiolipin antibodies were not correlated to severe OHSS development. Conclusion: Patients with relatively lower protein S activity were at higher risk for the development of severe OHSS, and its dangerous consequences. During clinical OHSS presentation, protein S decreased even more, and patients were more vulnerable to hypercoagulability states. These points should be kept in mind in risk assessment and adoption of prophylactic strategies

Lived experiences of patients with covid-19 infection: A phenomenology study

Aim To describe experiences of patients with COVID-19 infec-tion. Methods This qualitative research was conducted using a phenomenological approach, and participants were selected via purpo-sive sampling. In total, 14 patients with COVID-19 were selected (nine women and five men) aged 20-60 years. Data were collected via in-depth interviews with open questions and through observa-tion. Data analysis was performed using Colizzi's phenomenological approach. Results Three themes and nine categories were extracted; the main themes were mental strains, physical manifestations, and coping mechanisms. Mental strains entailed concerns, fears and isolation, on the other hand, physical manifestations comprised nervous, respiratory and gastrointestinal system, and systemic dis-orders. Coping mechanisms included religiosity and home reme-dies categories. Conclusion Mental strains were the most important issues in the patients with COVID-19, which were interwoven with concerning physical manifestations. Most of the participants used self-medi-cation and spiritual resources to cope with the disease. Therefore, it is recommended to carry out proper planning by healthcare per-sonnel to psychologically and spiritually support these patients, while alleviating physical manifestations of the disease. © 2021, Medical Association of Zenica-Doboj Canton. All rights reserved

Distribution of invasive fungal infections: Molecular epidemiology, etiology, clinical conditions, diagnosis and risk factors: A 3-year experience with 490 patients under intensive care

Recently, the prevalence of invasive fungal infections (IFIs) is rising. The global mortality rate of IFIs is 10�49. This study aimed to determine the prevalence, the causative agents, and the risk factors associated with the invasive fungal infections in a tertiary health center to provide valid decision-grounds for healthcare professionals to effectively prevent, control, and treat fungal infections. The current study was conducted on 1477 patients suspected to have systemic fungal infections from different units of the hospital. After screening using routine mycological examination, the patients were confirmed with complementary mycological and molecular methods. Patients were included based on the confirmed diagnosis of IFI and excluded based on lack of a microbiologically and histologically proven diagnosis of IFI. Of the 1477 patients recruited in this study, confirmed cases of fungal infection were 490 (169 proven; 321 cases probable). Among the fungi recovered, Candida species had the highest frequency 337 (68.8) followed by Aspergillus species 108 (22.1), Zygomycetes species 21 (4.3), non-Candida yeast 9 (1.8). Others were black fungi 5 (1), mycetoma agents 5 (1), Fusarium 4 (0.8), and Trichoderma (0.2). Hematologic malignancies and diabetes mellitus were the most common underlying diseases among IFI-confirmed patients. This study observed an increased frequency of invasive candidiasis with non-albicans Candida and other invasive saprophytic fungal infections. The increased rate of invasive candidiasis with non-albicans agents highlights a new perspective in the epidemiology and treatment of invasive fungal infections. © 2020 Elsevier Lt