Retrospective Evaluation and Comparison of All Medicolegal Autopsies Performed Before and After the COVID-19 Pandemic in İzmir

Objective:In this study, in the 2 year period before and after the first date of the COVID-19 case in Turkey (between 11.03.2019-10.03.2020-11.03.2020-10.03.2021) İzmir Forensic Medicine Group Presidency we aimed to show the effects of the SARS-CoV-2 pandemic by examining the autopsies and autopsy findings performed in the Izmir Forensic Medicine Group Presidency through the forensic autopsy records.Methods:Our study was planned as a retrospective study of autopsies performed in İzmir Forensic Medicine Group Presidency. The work will start after the necessary permissions are obtained from the İstanbul Forensic Medicine Institute. The data of autopsies performed between 11.03.2019-10.03.2020 and 11.03.2020-10.03.2021 in the İzmir Forensic Medicine Group Presidency will be analyzed in terms of age, gender, cause of death, origin of death and mode of death.Results:A total of 4604 autopsy cases were examined in our study. In the pre-pandemic period, the number of female cases was 472 (21.4%), the number of male cases was 1734 (78.6%), the most common form of death was suspicious death with 1192 (54%), and the most common origin was 1039 (47.1%) was detected as natural death. After the pandemic, these numbers were found to be 413 (17.2%) for women, 1985 (82.8%) for men, 1398 (58.3) suspicious deaths and 1072 (44.7%) natural deaths.Conclusion:As in all areas of life, changes have occurred in forensic autopsy practice with the COVID-19 pandemic, and we think it is important to share the data we have obtained as a result of examining and analyzing all forensic autopsies performed during and before the SARS-CoV-2 pandemic in Izmir for two years

A finite element-galerkin formulation for the dynamic analysis of linear viscoelastic two dimensional solids.

Ph.D. - Doctoral Progra

Extension of the residual variable method to propagation problems and its application to the diffusion equation in spherical coordinates

We consider a partial differential equation in spherical (cylindrical) coordinates describing a dynamic process in an infinite medium with an inner spherical (cylindrical) boundary. If an analytical solution is not possible to obtain, then one resorts to numerical techniques. In this case it becomes necessary to discretize the infinite domain even if the solution is required on the inner spherical (cylindrical) surface or at a limited number of points in the domain only. The Residual Variable Method (RVM) circumvents the difficulty of discretizing the infinite domain. The governing equation is integrated once in radial direction. The number of the spatial dimensions is, thus, reduced by one. It is now possible to determine the solution on the inner boundary without having to deal with the infinite domain. The RVM is amenable to ''marching'' solutions in a finite-difference implementation and it is suitable for the analysis of propagation into the infinite medium from the inner surface. There is no need to discretize the infinite domain in its entirety at all. The propagation analysis can be terminated at any point in the radial direction without having to consider the rest

Viscoelastic rod using the generalized finite difference method

The finite difference method is quite extensively used to obtain the approximate solutions of many equations of mathematical physics. In this study, the precise algorithm in the time domain is combined with the generalized finite difference method to solve dynamic viscoelasticity problems. The numerical results obtained are satisfactory, and they are presented together with finite difference and finite element solutions.

EXTENSION OF THE RESIDUAL VARIABLE METHOD TO PROPAGATION PROBLEMS AND ITS APPLICATION TO THE WAVE-EQUATION IN CYLINDRICAL COORDINATES

Consider a partial differential equation with cylindrical coordinates describing a dynamic process in an infinite medium with an inner cylindrical boundary. If an analytical solution to the problem is not possible, then one resorts to numerical techniques. In this case it becomes necessary to discretize the infinite domain even if the solution is required on the inner cylindrical surface or at a limited number of points in the domain only. The residual variable method (RVM) circumvents the difficulty associated with the discretization of the infinite domain. In essence, the governing equation is integrated once in a radial direction. The number of the spatial dimensions of the problem is reduced by one. It is now possible to determine the solution on the inner boundary without having to deal with the infinite domain. It is shown in this paper that the RVM is amenable to 'marching' solutions in a finite-difference implementation and that it is suitable for the analysis of propagation into the infinite medium from the inner surface. There is no need to discretize the infinite domain in its entirety at all. The propagation analysis can be terminated at any point in the radial direction without having to consider the rest

Thermoelastic response of a fin exhibiting elliptic thickness profile: An analtical solution

A thermoelastic analytical solution of a variable thickness cooling fin problem is presented. A variable thickness annular fin mounted on a hot rotating rigid shaft is considered. The thickness of the fin is assumed to vary radially in a continuously variable nonlinear elliptic form. An energy equation that accounts for the conduction, convective heat loss from peripheral and edge surfaces, thickness variation and rotation is adopted. The thermoelastic equation is obtained under formal assumptions of plane stress and small strains. For given heat and centrifugal loads the temperature distribution in the fin and the corresponding state of stress are obtained by means of the analytical solutions of energy and thermoelastic equations, respectively. (C) 2007 Elsevier Masson SAS. All rights reserved

Zeminlere Yapılan Enjeksiyon Dağılımının Nümerik Simülasyonu İçin Küresel Ve Silindirik Modeller

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2010Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2010Bu çalışmada zeminlere yapılan enjeksiyonun nümerik simülasyonu için küresel ve silindirik iki fazlı akım modelleri sunulmuştur. Bu model, gözenekli ortamda birbirine karışmayan çok fazlı akımların teorisi kullanılarak geliştirilmiştir. Önerilen nümerik modelden elde edilen sonuçlar, literatürde mevcut olan deney sonuçları ve birbirine karışabilen iki fazlı akım modeli ile elde edilen simülasyon sonuçları kullanılarak karşılaştırılmış ve modelin geçerliliği test edilmiştir.in this stüdy a numerical model is presemed for the simulation of grout injection process in soils using spherical and cylindrical two-phase flow models. This model is obtained by using the theory of immiscible multiphase flow in porous media. Proposed model is tested by comparing the results obtained from proposed model and available experimental data and available simulation results using miscible flow models

On the use of complex stretching coordinates in generalized finite difference method with applications in inhomogeneous visco-elasto dynamics

In the study, in conjunction with perfectly matched layer (PML) analysis, an approach is proposed for the evaluation of complex derivatives directly in terms of complex stretching coordinates of points in PML. For doing this within the framework of generalized finite difference method (GFDM), a difference equation is formulated and presented, where both the function values and coordinates of data points might be complex. The use of the proposed approach is considered in the analysis of inhomogeneous visco-elasto-dynamic system and assessed through three example problems analyzed in Fourier space: the composite and inhomogeneous tube, layer and impedance problems. The GFDM results obtained for the tube and layer problems compare very closely and coincide almost exactly with the exact solution. In the impedance problems, rigid surface or embedded footings resting on a composite inhomogeneous half-space are considered. The influences of various types of inhomogeneities, as well as, of various geometric shapes of PML-(physical region) interfaces on impedance curves are examined