Yazar "Koçak, Cem" için Makale Koleksiyonu listeleme
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An ARMA type fuzzy time series forecasting method based on particle swarm optimization
In the literature, fuzzy time series forecasting models generally include fuzzy lagged variables. Thus, these fuzzy time series models have only autoregressive structure. Using such fuzzy time series models can cause ... -
ARMA(p,q) type high order fuzzy time series forecast method based on fuzzy logic relations
Koçak, Cem (Elsevier Ltd, 2017)Within classic time series approaches, a time series model can be studied under 3 groups, namely AR (autoregressive model), MA (moving averages model) and ARMA (autoregressive moving averages model). On the other hand, ... -
Clinical and pathological significance of programmed cell death 1 (PD-1)/programmed cell death ligand 1 (PD-L1) expression in high grade serous ovarian cancer
Baş, Yılmaz; Koç, Nermin; Helvacı, Kaan; Koçak, Cem; Akdeniz, Raşit; Keser Şahin, Havva Hande (Elsevier Science Inc, 2021)We investigated programmed cell death 1 (PD-1) / programmed cell death ligand 1 (PD-L1) expression in high grade serous ovarian cancer (HGSOC) and its relationship to tumor infiltrating lymphocytes (TIL) and prognosis. ... -
Early results with the Mutaf technique: A novel offmidline approach in pilonidal sinus surgery
Zorlu, Musa; Şahiner, İbrahim Tayfun; Zobacı, Ethem; Koçak, Cem; Yastı, Ahmet Çınar; Dolapçı, Mete (Korean Surgical Society, 2016)Purpose: The objective of the present study was to compare different off-midline techniques in terms of their advantages and disadvantages. Methods: A total of 81 patients were included in this prospective, controlled, ... -
The effect of social support on state anxiety levels during pregnancy
Büyükkayacı Duman, Nuriye; Koçak, Cem (Scientific Journal Publishers Limited, 2013)In this study our aim was to determine the effect of pregnant women's perception of level of multidimensional social support during pregnancy on their state anxiety level. The sample comprised 160 pregnant women who were ... -
Finding the best formulas to estimate fetal weight based on ultrasound for the Turkish population: a comparison of 24 formulas
Koçak, Özgür; Koçak, Cem (Imr Press, 2021)Background: Although prenatal diagnosis of fetal weight is a very important parameter that guides the clinician, the margin of error in fetal weight is still very high. Aims: The aim of this study is to identify the most ... -
First-order ARMA type fuzzy time series method based on fuzzy logic relation tables
Koçak, Cem (2013)Fuzzy time series approaches have an important deficiency according to classical time series approaches. This deficiency comes from the fact that all of the fuzzy time series models developed in the literature use ... -
Hemşirelerin bakım verici rollerine ilişkin tutum ölçeği geliştirilmesi: Geçerlik ve güvenirlik çalışması
Koçak, Cem; Albayrak, Saniye Ayla; Büyükkayacı Duman, Nuriye (Koç Üniversitesi Hemşirelik Fakültesi Semahat Arsel Hemşirelik Eğitim ve Araştırma Merkezi, 2014)Amaç: Bu çalışma, Hemşirelerin Bakım Verici Rollerine İlişkin Tutum Ölçeği (HBRTÖ) geliştirilmesi ve geçerlik güvenirlik değerlendirmesi yapmak amacıyla tasarlanmış metodolojik bir çalışmadır. Yöntem: 16 maddeden oluşan ... -
Investigation of toxic effects of mushroom poisoning on the cardiovascular system
Erenler, Ali Kemal; Doğan, Tolga; Koçak, Cem; Ece, Yasemin (Blackwell Publishing Ltd, 2016)Mushroom poisoning (MP) is a public health problem in many countries. It is well known that consumption of wild mushrooms may cause serious toxicity on renal, hepatic and brain functions. In the literature, however, studies ... -
Mass communication tool behavior on the effects of TV violence children age group 3-6
Özakar Akça, Selen; Koçak, Cem (Cerrahpaşa Tıp Fakültesi Psikiyatri Kliniği, 2012)Purpose: This ongoing study aims to daycare for 3-6 year-old children's frequency of television watching, to determine the content of programs broadcast on television, cartoons, movies and advertisements on children's ... -
A new deep intuitionistic fuzzy time series forecasting method based on long short‑term memory
Koçak, Cem; Eğrioğlu, Erol; Baş, Eren (Springer, 2021)In recent years, deep artificial neural networks can have better forecasting performance than many other artificial neural networks. The long short-term memory (LSTM) is one of the deep artificial neural networks. There ... -
A new fuzzy time series method based on an ARMA-type recurrent Pi-Sigma artificial neural network
Koçak, Cem; Dalar, Ali Zafer; Cağcağ Yolcu, Özge; Baş, Eren; Eğrioğlu, Erol (Springer, 2020)As it known in many studies, the fuzzy time series methods do not need assumptions such as stationary and the linearity required for classical time series approaches, so there is a huge field of study on fuzzy time series ... -
A new high order fuzzy ARMA time series forecasting method by using neural networks to define fuzzy relations
Koçak, Cem (Hindawi Publishing Corporation, 2015)Linear time series methods are researched under 3 topics, namely, AR (autoregressive), MA (moving averages), and ARMA (autoregressive moving averages) models. On the other hand, the univariate fuzzy time series forecasting ... -
Toplumdaki bireylerin çocuk istismarı ve ihmaline yönelik bilgi ve görüşleri
Koçak, Cem; Büyükgönenç, Lale (Hitit Üniversitesi, 2011)Çocuk istismarı ve ihmali; bir erişkin tarafından çocuğa yöneltilen, toplumsal kurallar ve profesyonel kişilerce uygunsuz ya da hasar verici olarak nitelendirilen, çocuğun gelişimini kısıtlayan eylem ve eylemsizliklerin ... -
Turkish Adaptation of the Early Learning Observation and Rating Scale-Teacher's Form: Validity and Reliability Study and Path Analysis for a Turkey Sample
Babaroğlu, Ayhan; Koçak, Cem (Hindawi Ltd, 2020)Acquiring information on the complete development of children during their early childhood, observing their development, and identifying the domains in which they need support have always been very important. There is a ... -
Üniversite öğrencilerinin ilk yardım bilgi düzeyleri ve bunu etkileyen faktörler
Büyükkayacı Duman, Nuriye; Koçak, Cem; Sözen, Cemil (Hitit Üniversitesi, 2013)Bu çalışma, üniversite öğrencilerinin ilk yardım konusunda bilgi düzeylerini belirlemek amacıyla yapılmış tanımlayıcı nitelikte bir çalışmadır. Araştırmanın evrenini, Hitit Üniversitesi Sağlık Yüksekokulu Hemşirelik Bölümü ...