Kocaeli Üniversitesi

Reservoir Regulation and Meteorological–Streamflow Coupling: A Multi-Region Matched-Basin Analysis with Drought-Event Diagnostics

Reservoirs can alter river responses to climatic water deficits, but distinguishing regulation-associated differences from hydroclimatic variability remains difficult. We use a large-sample matched-basin design to compare full-record meteorological–soil-moisture and meteorologica...

A Hybrid Fuzzy Probabilistic Risk Assessment Framework with Expert Based Simulator Feasibility Assessment for Chemical Tanker Cargo Operations

This study proposes a sequential hybrid framework integrating the Fuzzy Delphi Method (FDM), Fuzzy DEMATEL, and Fault Tree Analysis (FTA), complemented by an expert-based simulator scenario feasibility assessment for chemical tanker cargo operations. Its contribution lies in the...

Tourists’ Experiences With Smart Transportation Systems Across Europe: A UTAUT Perspective

Smart transportation systems constitute a component of smart tourism, shaping tourists’ mobility and travel experiences within a destination. However, research on the role of smart transportation systems in shaping tourists’ experiences remains limited. This study aims to examine...

Durability Performance of Waste Rubber Fiber-Reinforced Geopolymer Concrete Using the Taguchi Method

Abstract This study investigates the durability performance of waste rubber fiber (RF)-reinforced geopolymer concrete (RGPC) by evaluating the effects of rubber fiber content, ground granulated blast furnace slag (GGBS) percentage, and curing temperature (CT) using an L 9 ( 3 3 )...

Focal and Generalized Focal Geometry Associated with Rotational Hypersurfaces in E4

This paper investigates focal and generalized focal geometry associated with rotational hypersurfaces in the four-dimensional Euclidean space E4. Explicit parametrizations are derived for several classes of rotational hypersurfaces, including toroidal and special Monge-type struc...

Effects of Stem Cell-Derived Mitochondrial Transfer on H2O2-Induced Oxidative Stress in COV434 Granulosa Cells

Background and Objectives: Oxidative stress-induced mitochondrial dysfunction contributes to granulosa cell apoptosis and ovarian dysfunction. This study investigated the therapeutic potential of human Wharton’s jelly-derived mesenchymal stem cell-derived mitochondria (hWJ-MSCs-m...

Sexual prejudice and associated factors among clinical nurses in Türkiye: A cross-sectional study

Aim/objective This study aimed to assess the level of homophobia and to identify its independent predictors among practicing clinical nurses working in a tertiary university hospital in Türkiye. Background Homophobia among healthcare professionals undermines equitable care for se...

Erector Spinae Plane Block Reduces Opioid Consumption and Pain After Abdominal Hysterectomy

Objective: This study aimed to evaluate the association between preoperative erector spinae plane block (ESPB) and perioperative opioid consumption and postoperative pain scores in patients undergoing total abdominal hysterectomy under general anesthesia. Materials and Methods: T...

Balancing energy security and sustainability in G20 countries: a hybrid fuzzy Delphi multi-criteria framework

This study examines the tension between energy security and energy sustainability across the nineteen sovereign members of the Group of Twenty (G20). The framework is novel in three respects. First, criterion weights are elicited from a panel of six large language models (LLMs) a...

Phytotoxic impacts of microplastic pollution on cellular redox homeostasis and antioxidant defences in plants: a multilevel meta-analysis

Abstract The rapid build-up of plastic pollution in land-based ecosystems is a serious abiotic stressor that directly threatens cellular redox balance in plants. To precisely evaluate the risk of oxidative stress associated with microplastic exposure, a meta-analysis was conducte...

Linguistic challenges in English-medium instruction: a comparative study of electronics engineering and international relations

Abstract This quantitative study examined the linguistic challenges experienced by participants in English Medium Instruction (EMI) programmes by comparing two academic programmes (i.e., electronics engineering and international relations) at seven public universities in Turkey,...

Turkish Adaptation of the Clean Food Consumerism Scale: A Validity and Reliability Study

Background: Clean food consumerism reflects consumers’ preferences for foods perceived as natural, authentic, transparent, and health-promoting. This study aimed to culturally adapt the Clean Food Consumerism Scale (CFCS) into Turkish and evaluate its psychometric properties. Met...

Prognostic Value of Myocardial Contraction Fraction for One-Year Cardiac Death After Transcatheter Aortic Valve Implantation in Severe Aortic Stenosis: A Simple Echocardiographic Metric for High-Risk Stratification

OBJECTIVE: Myocardial contraction fraction (MCF) is a volumetric index of myocardial shortening that relates left ventricular stroke volume to myocardial volume. In patients with severe aortic stenosis (AS), left ventricular ejection fraction (LVEF) may remain preserved despite a...

Selective Upcycling of Waste PET into Di(2-ethylhexyl) Terephthalate via a Hybrid Organometallic Catalytic Strategy for PVC Plasticizer Applications

The selective conversion of post-consumer polyethylene terephthalate (PET) into value-added plasticizers offers a promising pathway for advancing polymer circularity within the scope of the circular economy approach. Herein, waste PET bottles were directly upcycled into di(2-ethy...

Baseline Liver Metabolic Health in Newly Diagnosed People Living with HIV Compared with HIV-Negative Controls: Cross-Sectional Findings from the Prospective MASHIV-TR Cohort

Metabolic dysfunction-associated steatotic liver disease (MASLD) is an important comorbidity in people living with HIV (PLWH), yet most data derive from individuals receiving antiretroviral therapy (ART). In the baseline cross-sectional analysis of the prospective multicentre MAS...

Exploring medical students’ experiences of role modelling in clinical training: a phenomenological study of professional identity formation

Abstract Background Role modelling in clinical settings is an important mechanism through which medical students internalize the values and norms of medical professionalism. Although previous research has examined how medical students experience and interpret role modelling in cl...

Real-world outcomes of children with first relapsed acute lymphoblastic leukemia treated according to the ALL-IC REL 2016 guideline in Türkiye

Relapsed acute lymphoblastic leukemia (ALL) remains a major challenge in pediatric oncology, particularly where access to modern immunotherapies is limited. This national multicenter study evaluated real-world outcomes of children with first relapsed ALL treated according to the...

Development of Electrospun Biodegradable Reduced Graphene Oxide (rGO)/P3HB4HB Composite Nanofibrous Membranes for Enhanced Microbial Fuel Cell Performance

ABSTRACT Emerging bioelectrochemical platforms called microbial fuel cells (MFCs) allow for the simultaneous treatment of wastewater and the production of sustainable electricity. By enabling effective proton transport between the anode and cathode compartments, the proton exchan...

Effect of Cold Needle on Injection Complications

Propose: This study aimed to evaluate the effects of cold needle (0–2°C) application on pain intensity, ecchymosis rate, and patient comfort during subcutaneous (SC) insulin injections. The hypotheses; When administering insulin via the SC route, a cold needle temperature reduces...

Thermomechanical Properties of Carbon and Glass Fiber-Reinforced Epoxy Composites as Function of Drilling Parameters

Dry drilling experiments were carried out on pure and hybrid carbon/glass fiber-reinforced epoxy laminates, viz., all carbon (C8), all glass (G8), glass-faced hybrid (G2C4G2), and carbon-faced hybrid (C2G4C2), using the newly designed high-speed steel (HSS) flow step drill. Drill...