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2021

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Impact Of Hybrid Power Generation On Voltage, Losses, And Electricity Cost Indistribution Networks, Yavuz Ateş, Tayfur Gökçek, Ahmet Yi̇ği̇t Arabul Jan 2021

Impact Of Hybrid Power Generation On Voltage, Losses, And Electricity Cost Indistribution Networks, Yavuz Ateş, Tayfur Gökçek, Ahmet Yi̇ği̇t Arabul

Turkish Journal of Electrical Engineering and Computer Sciences

Energy and its capacity has emerged as one of the biggest distribution challenges all over the world. The existing grid becomes insufficient along with the expansion of the consumption. Therefore, the number of distributed generation (DG) in distribution networks increases and it allows us to sell back the extra energy. However, the efficiency of energy must be maintained into optimal values from the grid to the end-users. In spite of a lot of advantages of DG units, there are some disadvantages like fluctuations in voltage, increments of power losses, wrong protection coordination, harmonic and energy quality issues etc.. If the …

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Analysis And Simulation Of Efficiency Optimized Ipm Drives In Constant Torqueregion With Reduced Computational Burden, Mi̇kai̇l Koç, Selçuk Emi̇roğlu, Bünyami̇n Tamyürek Jan 2021

Analysis And Simulation Of Efficiency Optimized Ipm Drives In Constant Torqueregion With Reduced Computational Burden, Mi̇kai̇l Koç, Selçuk Emi̇roğlu, Bünyami̇n Tamyürek

Turkish Journal of Electrical Engineering and Computer Sciences

Moving from internal combustion engine based towards electric based transportation is crucial for wide societies as they facilitate the use of green energy technologies such as wind and solar. Interior mounted permanent magnet (IPM) machines, also known as salient brushless alternating current (AC) machines, are commonly employed in traction applications as they have superior features, such as high efficiency operation, high torque, and power densities. The efficiency optimization in IPM drives is achieved by obtaining and operating at accurate and unique current angle for a certain electromagnetic torque demand. In conventional drives, the optimum current angle is obtained by online …

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Determination Of Pneumonia In X-Ray Chest Images By Using Convolutionalneural Network, Özlem Polat, Zümray Ölmez, Tamer Ölmez Jan 2021

Determination Of Pneumonia In X-Ray Chest Images By Using Convolutionalneural Network, Özlem Polat, Zümray Ölmez, Tamer Ölmez

Turkish Journal of Electrical Engineering and Computer Sciences

Pneumonia is one of the major diseases that cause a lot of deaths all over the world. Determining pneumonia from chest X-ray (CXR) images is an extremely difficult and important image processing problem. The discrimination of whether pneumonia is of bacterium or virus origin has also become more important during the pandemic. Automatic determination of the presence and origin of pneumonia is crucial for speeding up the treatment process and increasing the patient's survival rate. In this study, a convolutional neural network (CNN) framework is proposed for detection of pneumonia from CXR images. Two different binary CNNs and a triple …

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Power-Based Modelling And Control: Experimental Results On A Cart-Pole Doubleinverted Pendulum, Tuğçe Yaren, Selçuk Ki̇zi̇r Jan 2021

Power-Based Modelling And Control: Experimental Results On A Cart-Pole Doubleinverted Pendulum, Tuğçe Yaren, Selçuk Ki̇zi̇r

Turkish Journal of Electrical Engineering and Computer Sciences

This paper is concerned with the modeling framework based on power and control for a mechanical system that has nonlinear, unstable, and under-actuated characteristic features, based on an analogy, which is developed by using the Brayton and Moser's (BM) equations between mechanical and electrical systems. The analogy is based on a mixed-potential function generalized for BM. The mixed-potential function for a cart - pole double inverted pendulum (CPDIP) system is used as a new building block for modeling, analysis, and controller design. The analogy allows for the exact transfer of results from electrical circuit synthesis and analysis to the mechanical …

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Control Synthesis For Parametric Timed Automata Under Reachability, Ebru Aydin Göl Jan 2021

Control Synthesis For Parametric Timed Automata Under Reachability, Ebru Aydin Göl

Turkish Journal of Electrical Engineering and Computer Sciences

Timed automata is a fundamental modeling formalism for real-time systems. During the design of such real-time systems, often the system information is incomplete, and design choices can vary. These uncertainties can be integrated to the model via parameters and labelled transitions. Then, the design can be completed by tuning the parameters and restricting the transitions via controller synthesis. These problems, namely parameter synthesis and controller synthesis, are studied separately in the literature. Herein, these are combined to generate an automaton satisfying the given specification by both parameter tuning and controller synthesis, thus exploring all design choices. First, it is shown …

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Information Retrieval-Based Bug Localization Approach With Adaptive Attributeweighting, Mustafa Erşahi̇n, Semi̇h Utku, Deni̇z Kilinç, Buket Erşahi̇n Jan 2021

Information Retrieval-Based Bug Localization Approach With Adaptive Attributeweighting, Mustafa Erşahi̇n, Semi̇h Utku, Deni̇z Kilinç, Buket Erşahi̇n

Turkish Journal of Electrical Engineering and Computer Sciences

Software quality assurance is one of the crucial factors for the success of software projects. Bug fixing has an essential role in software quality assurance, and bug localization (BL) is the first step of this process. BL is difficult and time-consuming since the developers should understand the flow, coding structure, and the logic of the program. Information retrieval-based bug localization (IRBL) uses the information of bug reports and source code to locate the section of code in which the bug occurs. It is difficult to apply other tools because of the diversity of software development languages, design patterns, and development …

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Novel Ofdm Transmission Scheme Using Generalized Prefix With Subcarrierindex Modulation, Yusuf Acar Jan 2021

Novel Ofdm Transmission Scheme Using Generalized Prefix With Subcarrierindex Modulation, Yusuf Acar

Turkish Journal of Electrical Engineering and Computer Sciences

The cyclic prefix (CP) is a prefix technique widely used in orthogonal frequency division multiplexing (OFDM) systems in order to eliminate the intersymbol interference (ISI) caused by the dispersion of wireless channels. However, CP reduces the number of symbols that can be transmitted in one OFDM symbol. Therefore, CP is one of the bottlenecks of OFDM systems limiting their spectral efficiency (SE). This limitation on the SE of the classical CP-based OFDM system is the main motivation for this work to introduce a novel method. In this paper, the design of a new CP structure, which is based on the …

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Subcapsular Local Anesthesia Approach In Percutaneous Liver Biopsy: Less Pain, Morecomfort, Özgür Çakir, Can Aksu Jan 2021

Subcapsular Local Anesthesia Approach In Percutaneous Liver Biopsy: Less Pain, Morecomfort, Özgür Çakir, Can Aksu

Turkish Journal of Medical Sciences

Background/aim: To compare the subjective level of pain in patients who underwent an ultrasound-guided percutaneous liver biopsy (PLB) after either pericapsular anesthesia (PA) or subcapsular anesthesia (SA), based on the numeric rating scale (NRS). Materials and methods: A total of 323 patients, mean age 51, range 21-82 years; 160 (49.5%) male, referred to the Interventional Radiology Clinic of Kocaeli University Faculty of Medicine for image-guided PLB, between June 2019 and May 2020 were included and randomized into two groups by anesthetic type; the first (n = 171) consisted of patients undergoing SA while the second (n = 152) included patients …

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What Is The Predictive Value Of Preoperative Ca 125 Level On The Survival Rate Of Type 1endometrial Cancer?, Şafak Yilmaz Baran, Songül Alemdaroğlu, Gülşen Doğan Durdağ, Seda Yüksel Şi̇mşek, Fi̇li̇z Bolat, Fati̇h Köse, Hüsnü Çeli̇k Jan 2021

What Is The Predictive Value Of Preoperative Ca 125 Level On The Survival Rate Of Type 1endometrial Cancer?, Şafak Yilmaz Baran, Songül Alemdaroğlu, Gülşen Doğan Durdağ, Seda Yüksel Şi̇mşek, Fi̇li̇z Bolat, Fati̇h Köse, Hüsnü Çeli̇k

Turkish Journal of Medical Sciences

Background/aim: To investigate the utility of preoperative serum cancer antigen 125 (CA 125) levels in type 1 endometrial carcinoma (EC) as a marker for determining poor prognostic factors and survival. Material and methods: All patients with endometrial cancer, who had been treated between 2012 and 2020, were retrospectively reviewed, and finally, 256 patients with type 1 endometrium carcinoma were included in the study. The relationship between the clinicopathological characteristics, CA 125 level, and survival rates were analyzed. The cut-off value for the preoperative serum CA 125 level was defined as 16 IU/L. Results: The median serum CA 125 levels were …

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Effective Dose Of Intravenous Oxycodone Depending On Sex And Age For Attenuation Ofintubation-Related Hemodynamic Responses, Keum Young So, Ki Tae Jung, Bo Hyun Jang, Sang Hun Kim Jan 2021

Effective Dose Of Intravenous Oxycodone Depending On Sex And Age For Attenuation Ofintubation-Related Hemodynamic Responses, Keum Young So, Ki Tae Jung, Bo Hyun Jang, Sang Hun Kim

Turkish Journal of Medical Sciences

Background/aim: Preoperative intravenous oxycodone may help to prevent or attenuate intubation-related hemodynamic responses (IRHRs), but its pharmacokinetics differs according to age and sex. Therefore, we investigated the 95% effective dose (ED95) of intravenous oxycodone for attenuating all IRHRs, depending on the age and sex of the study population. Materials and methods: All patients were allocated to one of 6 groups: 1) 20-40 year old males, 2) 41-65yearold males, 3) 66-80 year old males, 4) 20-40 year old females, 5) 41-65yearold females, and 6) 66-80 year old females (groups YM, OM, EM, YF, OF, and EF, respectively). Using Dixon's up-and-down method, …

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Exenatide Improves Cardiovascular Risk Factors In Obese Patients With Type 2 Diabetesmellitus: A Prospective Study, Derya Köseoğlu, Sali̇h Süha Koparal, Özden Özdemi̇r Başer, Di̇lek Berker Jan 2021

Exenatide Improves Cardiovascular Risk Factors In Obese Patients With Type 2 Diabetesmellitus: A Prospective Study, Derya Köseoğlu, Sali̇h Süha Koparal, Özden Özdemi̇r Başer, Di̇lek Berker

Turkish Journal of Medical Sciences

Background/aim: The aim of this study was to evaluate the effects of a 6-month treatment regimen with exenatide on the lipid profile, high-sensitivity C-reactive protein (hsCRP), carotid intima media thickness (CIMT), visceral adiposity, and nonalcoholic fatty liver disease (NAFLD), all of which are important cardiovascular risk factors. Materials and methods: This study included 45 obese patients with type 2 diabetes mellitus (T2DM). Baseline clinical findings, laboratory parameters, and ultrasonography findings were recorded. An exenatide recipe was given twice daily to the patients and, after 6 months of therapy, the same variables were compared. The compared parameters were lipid profiles, hsCRP, …

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The Evaluation Of Intracellular Energy Metabolism In Prediabetic Patients And Patientsnewly Diagnosed With Type 2 Diabetes Mellitus, Erkan Dulkadi̇roğlu, Hüseyi̇n Özden, Hüseyi̇n Demi̇rci̇ Jan 2021

The Evaluation Of Intracellular Energy Metabolism In Prediabetic Patients And Patientsnewly Diagnosed With Type 2 Diabetes Mellitus, Erkan Dulkadi̇roğlu, Hüseyi̇n Özden, Hüseyi̇n Demi̇rci̇

Turkish Journal of Medical Sciences

Background/aim: Increased susceptibility to infections is a serious problem in diabetics. Impairment in the energy metabolism of the immune system is the main source of the problem. Early diagnosis of the impairment in energy metabolism is crucial. Our study aimed to investigate the energy metabolism in leukocytes in patient groups such as prediabetics and patients newly diagnosed with type 2 diabetes mellitus. Materials and methods: Our study included 21 newly diagnosed type 2 diabetic patients (NDDP), 30 prediabetic patients, and 22 adult volunteers. 75 g oral glucose tolerance test (OGTT) was applied to all patients included in the study. Blood …

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Clinicopathological Characteristics And Mutational Profile Of Kras And Nras Intunisian Patients With Sporadic Colorectal Cancer, Donia Ounissi, Marwa Weslati, Rahma Boughriba, Meriam Hazgui, Saadia Bouraoui Jan 2021

Clinicopathological Characteristics And Mutational Profile Of Kras And Nras Intunisian Patients With Sporadic Colorectal Cancer, Donia Ounissi, Marwa Weslati, Rahma Boughriba, Meriam Hazgui, Saadia Bouraoui

Turkish Journal of Medical Sciences

Background/aim: Colorectal cancer (CRC) is a major public health problem worldwide and in Tunisia due to its increasing rate of incidence. KRAS and NRAS mutations have become a pivotal part of CRC diagnosis, given their association to treatment resistance with antiepidermal growth factor receptor (EGFR) monoclonal antibodies. In this study, we aimed to screen for mutations in KRAS and NRAS genes in Tunisian patients with CRC and explore their correlations with clinicopathological features. Materials and methods: AmoyDx KRAS and NRAS mutation real-time PCR kits were used to screen for mutations in KRAS (exon 2) and NRAS (exons 2, 3, and …

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Evaluating The Persian Versions Of Two Psoriatic Arthritis Screening Questionnairesearly Arthritis For Psoriatic Patients Questionnaire (Earp) And Psoriasis Epidemiologyscreening Tool (Pest) In Iranian Psoriatic Patients, Vahide Lajevardi, Seyed Zahra Ghodsi, Mahdieh Shafiei, Amir Teimourpour, Ifa Etesami Jan 2021

Evaluating The Persian Versions Of Two Psoriatic Arthritis Screening Questionnairesearly Arthritis For Psoriatic Patients Questionnaire (Earp) And Psoriasis Epidemiologyscreening Tool (Pest) In Iranian Psoriatic Patients, Vahide Lajevardi, Seyed Zahra Ghodsi, Mahdieh Shafiei, Amir Teimourpour, Ifa Etesami

Turkish Journal of Medical Sciences

Background/aim: The majority of psoriatic arthritis (PsA) patients present at dermatology clinics with cutaneous psoriasis up to 10 years prior to arthritis onset; therefore, applying a suitable screening tool to detect PsA early is essential for dermatologists. This study aimed to validate and evaluate the Persian version of two PsA screening questionnaires, the early arthritis for psoriatic patients questionnaire (EARP) and the psoriasis epidemiology screening tool (PEST) in Iranian psoriatic patients. Materials and methods: In this cross-sectional study, psoriatic patients who presented to the dermatology clinic without a previously established PsA were asked to fill out the Persian version of …

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A Survey Of Bullous Diseases In A Turkish University Hospital: Clinicoepidemiologicalcharacteristics And Follow-Up, Zekayi̇ Kutlubay, Ayşegül Sevi̇m Keçi̇ci̇, Uğur Çeli̇k, Mehmet Cem Mat Jan 2021

A Survey Of Bullous Diseases In A Turkish University Hospital: Clinicoepidemiologicalcharacteristics And Follow-Up, Zekayi̇ Kutlubay, Ayşegül Sevi̇m Keçi̇ci̇, Uğur Çeli̇k, Mehmet Cem Mat

Turkish Journal of Medical Sciences

Background/aim: Autoimmune bullous diseases, if left untreated, are life-threatening conditions affecting primarily skin and mucous membranes. These blistering disorders are characterized by epidermal or subepidermal detachment. Autoimmunity plays a key role in pathogenesis; therefore, immunosuppressive agents are the treatment of choice. The aim of this study is to document relative frequencies of different autoimmune bullous diseases, patient characteristics, treatment options, and side effects in patients presenting to our bullous skin disease center at İstanbul University, Cerrahpaşa, Cerrahpaşa Medical Faculty. Materials and methods: Medical files were examined retrospectively for all patients with autoimmune bullous diseases who were followed up between 2003 …

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Determining Overfitting And Underfitting In Generative Adversarial Networksusing Fréchet Distance, Enes Eken Jan 2021

Determining Overfitting And Underfitting In Generative Adversarial Networksusing Fréchet Distance, Enes Eken

Turkish Journal of Electrical Engineering and Computer Sciences

Generative adversarial networks (GANs) can be used in a wide range of applications where drawing samples from a data probability distribution without explicitly representing it is essential. Unlike the deep convolutional neural networks (CNNs) trained for mapping an input to one of the multiple outputs, monitoring the overfitting and underfitting in GANs is not trivial since they are not classifying but generating a data. While training set and validation set accuracy give a direct sense of success in terms of overfitting and underfitting for CNNs during the training process, evaluating the GANs mainly depends on the visual inspection of the …

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A Case Study On Player Selection And Team Formation In Football With Machinelearning, Di̇dem Abi̇di̇n Jan 2021

A Case Study On Player Selection And Team Formation In Football With Machinelearning, Di̇dem Abi̇di̇n

Turkish Journal of Electrical Engineering and Computer Sciences

Machine learning has been widely used in different domains to extract information from raw data. Sports is one of the popular domains for researchers to work on recently. Although score prediction for matches is the most preferred application area for artificial intelligence, player selection, and team formation is also an application area worth working on. There are some studies in the literature about player selection and team formation which are examined in this study. The study has two important contributions: First one is to apply seven different machine learning algorithms on our dataset to find the best player combination for …

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Analysis Of Optical Gyroscopes With Vertically Stacked Ring Resonators, Dooyoung Hah Jan 2021

Analysis Of Optical Gyroscopes With Vertically Stacked Ring Resonators, Dooyoung Hah

Turkish Journal of Electrical Engineering and Computer Sciences

Without any moving part, optical gyroscopes exhibit superior reliability and accuracy in comparison to mechanical sensors. Microring-resonator-based optical gyroscopes emerged as alternatives for bulky conventional Sagnac interferometer sensors, especially attractive for applications with limited footprints. Previously, it has been reported that planar incorporation of multiple resonators does not bring about improvement in sensitivity for a given area because the increase in Sagnac phase accumulation does not outrun the increase of area. Therefore, it was naturally suggested to consider vertical stacking of ring resonators because then, the resonators can share the same footprint. In this work, sensitivity performances of such configurations …

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Ige-Mediated Food Allergy Throughout Life, Ebru Çelebi̇oğlu, Ayşegül Akarsu, Ümi̇t Murat Şahi̇ner Jan 2021

Ige-Mediated Food Allergy Throughout Life, Ebru Çelebi̇oğlu, Ayşegül Akarsu, Ümi̇t Murat Şahi̇ner

Turkish Journal of Medical Sciences

No abstract provided.

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Distribution Of Nuchal Translucency Thickness At 11 To 14 Weeks Of Gestation In A Normalturkish Population, Gülseren Di̇nç, İlker Eyüboğlu Jan 2021

Distribution Of Nuchal Translucency Thickness At 11 To 14 Weeks Of Gestation In A Normalturkish Population, Gülseren Di̇nç, İlker Eyüboğlu

Turkish Journal of Medical Sciences

Background/aim: The aim of this study was to determine fetal nuchal translucency (NT) thickness nomogram values in first trimester in a Turkish population and compare them with previously reported European and Asian nomogram data. Material and methods: Ultrasonographic measurements of crown-rump length (CRL) and NT thicknesses were obtained from 11 to 14 weeks of gestation in a normal Turkish population. Pregnant women with singleton pregnancy and fetal CRL between 45 and 84 mm were included in the study. The mean 1st, 3rd, 5th, 50th, 90th, 95th, 97th, and 99th percentiles and fixed cut off values of ≥ 2.5 mm, ≥ …

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Comprehensive Assessment Of Levodopa-Carbidopa Intestinal Gel For Turkish Advancedparkinson's Disease Patients, Yeşi̇m Sücüllü Karadağ, Tuğçe Saltoğlu, Fadi̇me Erdoğan Küçükdağli, Ömer Öztürk, Hasan Tankut Köseoğlu, Emi̇n Altiparmak Jan 2021

Comprehensive Assessment Of Levodopa-Carbidopa Intestinal Gel For Turkish Advancedparkinson's Disease Patients, Yeşi̇m Sücüllü Karadağ, Tuğçe Saltoğlu, Fadi̇me Erdoğan Küçükdağli, Ömer Öztürk, Hasan Tankut Köseoğlu, Emi̇n Altiparmak

Turkish Journal of Medical Sciences

Background/aim: Levodopa-carbidopa intestinal gel (LCIG) is an effective treatment modality in the management of advanced Parkinson's disease (PD) despite frequent adverse events and different rates of dropouts. Efficacy and safety data regarding Turkish patients on LCIG are limited. This study aims to report in detail the efficacy and adverse effect profile of LCIG among advanced PD patients from a Turkish center for movement disorders. Materials and methods: Twenty-two patients (50% male) who started receiving LCIG between December 2014 and March 2020 were recruited. The efficacy of LCIG was assessed with the Unified Parkinson's Disease Rating Scale (UPDRS III), Clinical Global …

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Can Urinary Biomarkers Predict Acute Kidney Injury In Newborns With Critical Congenitalheart Disease?, Özgün Uygur, Özge Altun Köroğlu, Reşi̇t Ertürk Levent, Eser Sözmen, Firat Ergi̇n, Yüksel Atay, Mehmet Yalaz, Mete Akisü, Ni̇lgün Kültürsay Jan 2021

Can Urinary Biomarkers Predict Acute Kidney Injury In Newborns With Critical Congenitalheart Disease?, Özgün Uygur, Özge Altun Köroğlu, Reşi̇t Ertürk Levent, Eser Sözmen, Firat Ergi̇n, Yüksel Atay, Mehmet Yalaz, Mete Akisü, Ni̇lgün Kültürsay

Turkish Journal of Medical Sciences

Background/aim: Congenital heart disease (CHD) is the most common congenital malformation group and is the leading cause of newborn mortality in developed countries. Most of the infants with CHD develop preoperative or postoperative acute kidney injury (AKI). Acute kidney injury may develop before the serum creatinine rise and oliguria. Urinary biomarkers such as kidney injury molecule-1 (KIM-1), neutrophil gelatinase-associated lipocalin (NGAL), interleukin (IL)-18, and cystatin C may predict AKI in patients with critical CHD (CCHD) before the serum creatinine rise. In this study, we aimed to determine the AKI incidence among newborn patients with CCHD and investigate the predictivity of …

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The Importance Of Histological Patterns On Pd-L1 Staining Heterogeneity: Should Weuse Pattern-Based Approach For Selecting Tumor Samples For Pd-L1 Testing In Lungadenocarcinomas?, Pinar Bulutay, Pinar Firat, Emi̇ne Handan Zeren, Suat Erus, Serhan Tanju, Mustafa Şükrü Di̇lege Jan 2021

The Importance Of Histological Patterns On Pd-L1 Staining Heterogeneity: Should Weuse Pattern-Based Approach For Selecting Tumor Samples For Pd-L1 Testing In Lungadenocarcinomas?, Pinar Bulutay, Pinar Firat, Emi̇ne Handan Zeren, Suat Erus, Serhan Tanju, Mustafa Şükrü Di̇lege

Turkish Journal of Medical Sciences

Background/aim: Programmed death ligand-1 (PD-L1) is a predictive marker for immunotherapeutic agents. However, heterogeneous staining of PD-L1 can cause false-negative results. The aim of this study is to evaluate the importance of histological patterns on PD-L1 staining heterogeneity in lung adenocarcinomas (LAC). Materials and methods: PD-L1 immunohistochemistry (IHC) stain was performed to two different tissue cores of 128 LAC cases, and cut-off values are given for grouping the cases according to the percentage of staining (1%-10%, 11%-49%, 50%-100%). Staining rates between cores were compared and analyzed by their histological patterns. Also, the relation of the PD-L1 expression with the clinicopathological …

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Nontraumatic Coma In The Pediatric Intensive Care Unit: Etiology, Clinical Characteristicsand Outcome, Muhterem Duyu, Zeynep Karakaya Altun, Seli̇n Yildiz Jan 2021

Nontraumatic Coma In The Pediatric Intensive Care Unit: Etiology, Clinical Characteristicsand Outcome, Muhterem Duyu, Zeynep Karakaya Altun, Seli̇n Yildiz

Turkish Journal of Medical Sciences

Background/aim: The purpose of this study was to evaluate the etiology, clinical characteristics, and outcome of nontraumatic coma (NTC) among children admitted to a pediatric intensive care unit (PICU). Materials and methods: A total of 159 children with NTC were included in the study. The modified Glasgow coma scale (GCS) was used to assess consciousness. Patients were classified with regard to etiology. For each patient, demographic and clinical characteristics, survival and degree of disability at PICU discharge were recorded. Results: Median age was 55 months (IQR: 17.0 - 109.0). The most common cause of NTC was neuroinfection (31.4%) followed by …

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Hepatitis A Susceptibility Parallels High Covid-19 Mortality, Fai̇k Sariali̇oğlu, Fatma Burcu Belen, Kadi̇r Mutlu Hayran Jan 2021

Hepatitis A Susceptibility Parallels High Covid-19 Mortality, Fai̇k Sariali̇oğlu, Fatma Burcu Belen, Kadi̇r Mutlu Hayran

Turkish Journal of Medical Sciences

Background/aim:COVID-19 has become the biggest health problem of this century. It has been hypothesized that immunity against hepatitis A virus (HAV) may provide protection from COVID- 19. Materials and methods: As of 10June 2020, the infection had spread to 213 countries, with 7.3 million people infected and 413,733 dead. This data was combined with the World Health Organization susceptibility classification on the worldwide prevalence of HAV, and the relationship between HAV susceptibility and COVID-19 mortality were analyzed. Results: When the data from 213 countries were analyzed, it was found that there was a significant increasing trend in COVID-19 mortality rates …

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Adaptation Of Metaheuristic Algorithms To Improve Training Performance Of Aneszsl Model, Şi̇fa Özsari, Mehmet Serdar Güzel, Gazi̇ Erkan Bostanci, Ayhan Aydin Jan 2021

Adaptation Of Metaheuristic Algorithms To Improve Training Performance Of Aneszsl Model, Şi̇fa Özsari, Mehmet Serdar Güzel, Gazi̇ Erkan Bostanci, Ayhan Aydin

Turkish Journal of Electrical Engineering and Computer Sciences

Zero-shot learning (ZSL) is a recent promising learning approach that is similar to human vision systems. ZSL essentially allows machines to categorize objects without requiring labeled training data. In principle, ZSL proposes a novel recognition model by specifying merely the attributes of the category. Recently, several sophisticated approaches have been introduced to address the challenges regarding this problem. Embarrassingly simple approach to zeroshot learning (ESZSL) is one of the critical of those approaches that basically proposes a simple but efficient linear code solution. However, the performance of the ESZSL model mainly depends on parameter selection. Metaheuristic algorithms are considered as …

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A New Approach: Semisupervised Ordinal Classification, Ferda Ünal, Derya Bi̇rant, Özlem Şeker Jan 2021

A New Approach: Semisupervised Ordinal Classification, Ferda Ünal, Derya Bi̇rant, Özlem Şeker

Turkish Journal of Electrical Engineering and Computer Sciences

Semisupervised learning is a type of machine learning technique that constructs a classifier by learning from a small collection of labeled samples and a large collection of unlabeled ones. Although some progress has been made in this research area, the existing semisupervised methods provide a nominal classification task. However, semisupervised learning for ordinal classification is yet to be explored. To bridge the gap, this study combines two concepts ?semisupervised learning? and "ordinal classification" for the categorical class labels for the first time and introduces a new concept of "semisupervised ordinal classification". This paper proposes a new algorithm for semisupervised learning …

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Aicpa Technical Questions And Answers, 2021, American Institute Of Certified Public Accountants (Aicpa) Jan 2021

Aicpa Technical Questions And Answers, 2021, American Institute Of Certified Public Accountants (Aicpa)

Guides, Handbooks and Manuals

No abstract provided.

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Effects Of Orally Administered Colloidal Silver On The Macroscopic And Microscopic Features Of Kidneys In Apparently Healthy Adult Female Mice, Lia Isabella T. Soliman Jan 2021

Effects Of Orally Administered Colloidal Silver On The Macroscopic And Microscopic Features Of Kidneys In Apparently Healthy Adult Female Mice, Lia Isabella T. Soliman

Undergraduate Theses

This study described the macroscopic and microscopic lesions, and frequency of silver ion deposition in the kidneys of female ICR mice upon oral administration of colloidal silver. Fifty samples were divided into a total of six treatment groups: two control groups (n=5) given 3DH2O (0.07mL), two low dose treatment groups (n=10) given 0.07mL colloidal silver solution, and two high dose treatment groups (n=10) given 0.12mL colloidal silver solution, each with durations of seven or 14 days. No macroscopic lesions were observed. Histopathology revealed glomerulonephritis as the most common microscopic lesion, followed by congestion and fibrosis. Tubular hypertrophy due to compensatory …

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Effect Of Seawater Ageing On Fracture Toughness Of Stitched Glass Fiber/Epoxy Laminates For Marine Applications, Atizaz Hassan, Rafiullah Khan, Numan Khan, Muhammad Aamir, Danil Y. Pimenov, Khaled Giasin Jan 2021

Effect Of Seawater Ageing On Fracture Toughness Of Stitched Glass Fiber/Epoxy Laminates For Marine Applications, Atizaz Hassan, Rafiullah Khan, Numan Khan, Muhammad Aamir, Danil Y. Pimenov, Khaled Giasin

Research outputs 2014 to 2021

Composite materials are used in various industries such as marine, aircraft, automotive, etc. In marine applications, composites are exposed to seawater, which can affect their mechanical properties due to moisture absorption. This work focuses on the durability of composite materials under the short-term effect of seawater ageing. The specimens were prepared from glass fiber/epoxy using a hand lap-up method and stitched in the z-direction with Kevlar fiber. The specimens were submerged in seawater for 24 and 35 days. A significant decrease in maximum load was found as specimen immersion time in seawater increased. The seawater ageing also affected fracture toughness …

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