TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14365/4
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Article Citation - WoS: 6Prospective, Multicenter, Turkish Out of Hospital Cardiac Arrest Study: Trohca(Wolters Kluwer Medknow Publications, 2024-07) Günaydın, Gül Pamukçu; Genç, Sınan; Utlu, Sibel Güçlü; Sabak, Mustafa; Ozhasenekler, Ayhan; Şener, Alp; Demirbağ, Mehmet; Aksay, Ersin; Aksel, Gokhan; Pekdemir, Murat; Islam, Mehmet Muzaffer; Karahan, Sevilay; Bozkurt, MustafaOBJECTIVES: There is no sufficient data to provide a clear picture of out of hospital cardiac arrest (OHCA) across Türkiye. This study is the first to present the prognostic outcomes of OHCA cases and the factors associated with these outcomes. MATERIALS AND METHODS:The study was conducted in a prospective, observational, multicenter design under the leadership of the Emergency Medicine Association of Turkey Resuscitation Study Group. OHCA cases aged 18 years and over who were admitted to 28 centers from Türkiye were included in the study. Survived event, return of spontaneous circulation (ROSC), survival to hospital discharge, and neurological outcome at discharge were investigated as primary outcomes. RESULTS: One thousand and three patients were included in the final analysis. 61.1% of the patients were male, and the average age was 67.0 ± 15.2. Cardiopulmonary resuscitation (CPR) was performed on 86.5% of the patients in the prehospital period by emergency medical service, and bystander CPR was performed on only 2.9% by nonhealth care providers. As a result, the survived event rate was found to be 6.9%. The survival rate upon hospital discharge was 4.4%, with 2.7% of patients achieving a good neurological outcome upon discharge. In addition, the overall ROSC and sustained ROSC rates were 45.2% and 33.4%, respectively. In the multiple logistic regression analysis, male gender, initial shockable rhythm, a shorter prehospital duration of CPR, and the lack of CPR requirement in the emergency department were determined to be independent predictors for the survival to hospital discharge. CONCLUSION: Compared to global data, survival to hospital discharge and good neurological outcome rates appear to be lower in our study. We conclude that this result is related to low bystander CPR rates. Although not the focus of this study, inadequate postresuscitative care and intensive care support should also be discussed in this regard. It is obvious that this issue should be carefully addressed through political moves in the health and social fields.Article Citation - WoS: 3Citation - Scopus: 5Turkey Embarks Upon Ballistic Missiles: Why and How?(Forsnet, 2017-12-01) Egeli S.; Egeli, SitkiFrom the late-1980s, and in response to the rapid spread of ballistic missiles in her neighborhood, Turkey has opted to add a symmetrical ingredient to her traditional policy of asymmetrical response, and began developing and deploying her own ballistic missiles. Additionally, thanks to the rapid technological progress during the last 10-15 years, shorter range ballistic missiles have been rendered attractive weapon systems even for countries like Turkey with access to advanced air power assets. Thanks to multi-phased development program, Turkey has recently deployed ballistic missile with a range of up to 300 km, whereas development work has been underway on longer-range derivatives. Paying tribute to geostrategic, technological, cost, and foreign policy considerations, the optimum range bracket for Turkey’s ballistic missiles appears to be around 800 kilometers. Recent calls for ballistic missiles of much longer ranges (e.g. 2,500 km) do not correspond to Turkey’s geostrategic and security circumstances. Rather than being the products of careful cost-benefit analyses, those calls appear to be the outcomes of unarticulated competitive reasoning and instincts. Combined with controversial and puzzling statements coming from the individuals close to Turkey’s top decision-making circles, they are seen and treated as further signs of Turkey’s latent nuclear weapon aspirations. © 2017, Forsnet. All rights reserved.Article Citation - WoS: 32Citation - Scopus: 32Covid-19 Anxiety in People Living With Hiv: an Online Cross-Sectional Study(Tubitak Scientific & Technical Research Council Turkey, 2020-12-17) Kuman Tuncel, Ozlem; Pullukcu, Husnu; Erdem, Huseyin Aytac; Kurtaran, Behice; Tasbakan, Selin Ece; Isikgoz Tasbakan, Meltem; Tuncel, Ozlem KumanBackground/aim: The emergence of the coronavirus disease 2019 (COVID-19) outbreak has had an enormous emotional impact on sonic vulnerable groups, such as people living with human immunodeficiency virus (HIV) (PLHIV). This study was planned with the aim of assessing the anxiety levels of PLHIV and the sources of their anxiety. Materials and methods: A web-based questionnaire was sent to PLHIV using the virtual snowball sampling method. The questionnaire included questions about sociodemographic status, information about HIV infection, and the Beck Anxiety Inventory (BAI). Additionally, some opinions of the participants about COVID-19 were asked. Results: A total of 307 respondents, with a median age of 33 years, from 32 different cities, participated in the study. More than half of the respondents reported the belief that COVID-19 was not sufficiently well-known by the medical community and nearly 45% believed that they would have snore complications if they contracted COVID-19. One-fourth of the participants had anxiety. Having a preexisting psychiatric disorder, perceiving that they were practicing insufficient preventive measures, not being sure about the presence of any individuals with COVID-19 in their environment, and living with a household member with a chronic disease were found to be the risk factors of PLHIV for having anxiety during this pandemic. The BAI scores were correlated with the patient-reported anxiety levels about the spread of COVID-19 in Turkey, acquiring COVID-19, transmitting COVID-19 to another person, and transmitting HIV to another person. Among the stated conditions, the most common concern was the spread of COVID-19 all over the country, while the least common was transmitting HIV to someone else. Conclusion: The results revealed that a significant proportion of the sample had anxiety, and the findings were essential for developing evidence-based strategies for decreasing the anxiety of PLHIV, especially for those who had risk factors and to provide them with better health care during this pandemic or other pandemic-like crises.Article A Convergent Algorithm for a Cascade Network of Multiplexed Dual Output Discrete Perceptrons for Linearly Nonseparable Classification(Tubitak Scientific & Technical Research Council Turkey, 2014) Genc, Ibrahim; Guzelis, CuneytIn this paper a new discrete perceptron model is introduced. The model forms a cascade structure and it is capable of realizing an arbitrary classification task designed by a constructive learning algorithm. The main idea is to copy a discrete perceptron neuron's output to have a complementary dual output for the neuron, and then to select, by using a multiplexer, the true output, which might be 0 or 1 depending on the given input. Hence, the problem of realization of the desired output is transformed into the realization of the selector signal of the multiplexer. In the next step, the selector signal is taken as the desired output signal for the remaining part of the network. The repeated applications of the procedure render the problem into a linearly separable one and eliminate the necessity of using the selector signal in the last step of the algorithm. The proposed modification to the discrete perceptron brings universality with the expense of getting just a slight modification in hardware implementation.Article Citation - WoS: 2Citation - Scopus: 2Model-Based Robust Chaotification Using Sliding Mode Control(Tubitak Scientific & Technical Research Council Turkey, 2014) Kocaoglu, Aykut; Guzelis, CuneytChaos is a complex behavior of dynamical nonlinear systems that is undesirable in most applications and should be controlled; however, it is desirable in some situations and should be generated. In this paper, a robust chaotification scheme based on sliding mode control is proposed for model based chaotification. A continuous time single input observable system is considered such that it is subject to parameter uncertainties, nonlinearities, noises, and disturbances, which are all additive to the input and can be modeled as an unknown function but bounded by a known function. The designed dynamical state feedback control law forces the system to match a reference chaotic system in finite time irrespective of the mentioned uncertainties, noises, and disturbances, as provided by the developed sliding mode control scheme. Simulation results are provided to illustrate the robustness of the proposed scheme against parameter uncertainties and noises. The results are compared with those of other model-based methods and Lyapunov exponents are calculated to show whether the closed-loop control systems exhibit chaotic behavior or not.