Hatay Mustafa Kemal Üniversitesi Akademik Veri Yönetim Sistemi
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Virtual Assistant Usage Habit: The Mediating Role of Emotional and Cognitive Trust in the Context of Anthropomorphism, Enjoyment, Intelligence
No full textThe aim of this study is to examine the relationship between the habit of using virtual assistants and perceived anthropomorphism, perceived enjoyment and perceived intelligence. Additionally, the study tests the mediating role of emotional and cognitive trust in the relationship between perceived anthropomorphism, perceived intelligence and the habit of using virtual assistants. The research model was tested using the Structural Equation Modeling (SEM) approach. Data for the study were collected through an online survey from 598 consumers aged 18-25 residing in Turkey. This study advances consumer behavior literature and provides guidance to managers of emerging technology-based businesses
Expression patterns of growth differentiation factor 8 protein in ovarian follicles and the corpus luteum of domestic cats
No full textThe Growth Differentiation Factor 8 is a member of the Transforming Growth Factor Beta family and plays a vital role in ovarian dynamics. The present study investigated: i) the expression patterns of Growth Differentiation Factor 8 protein in feline ovarian follicles and corpus luteum, and ii) the effect of reproductive cycle stages on ovarian GDF8 expression in domestic cats. Ovaries were collected from 28 healthy domestic female cats undergoing elective ovariohysterectomy and classified into follicular (n = 15) and luteal (n = 13) phase groups. Growth Differentiation Factor 8 protein expression was assessed via enzyme-linked immunosorbent assay (ELISA) and immunohistochemistry. In primordial follicles, Growth Differentiation Factor 8 immunoreactivity was restricted to the oocyte. In primary and secondary follicles, both oocytes and granulosa cells exhibited Growth Differentiation Factor 8 staining, while thecal cells remained negative. In antral follicles, Growth Differentiation Factor 8 was present in oocytes, granulosa cells, and follicular fluid, but absent in thecal cells. In the corpus luteum, Growth Differentiation Factor 8 immunoreactivity varied by developmental stage. Mild staining was observed in luteal cells during early development and maintenance. Severe immunoreactivity appeared in late developmental and maintenance stages, while moderate staining was present during regression. Non-steroidogenic cells showed no reactivity. No significant differences in ovarian Growth Differentiation Factor 8 expression were found between follicular and luteal phases, nor between maintenance and regression stages of the corpus luteum. Growth Differentiation Factor 8 may significantly regulate folliculogenesis and corpus luteum development in the feline ovary
Analysis of consumers preferences for food packaging and environmental awareness: A case study of Hatay, Türkiye
No full textNonlinear impacts of environmental transport taxes and biofuel consumption on greenhouse emissions in the four largest European Union countries
No full textIncompatible with the pioneering role of the transportation sector in greenhouse gas (GHG) emissions, this research mainly deals with GHG emissions from the transport sector. In this context, the study looks at the four leading European Union (EU) countries (i.e., Germany, France, Italy, and Spain), investigates emissions from their sub-types of the transport sector (i.e., aviation, rail, and road), uses environmental transport taxes (ETAX) as the main explanatory variable in the bivariate modeling, and considers biofuel consumption (BIO) as a control factor in the multivariate modeling. The study uses monthly data between 2004 and 2022, bivariate and multivariate quantile-on-quantile regression as well, and Granger causality-in-quantiles as the main approaches. The results demonstrate that (i) ETAX is completely inefficient on aviation and road transport GHG emissions; (ii) ETAX curbs rail transport GHG emissions in France at only middle quantiles; (iii) with the moderating impact of BIO, ETAX becomes effective in declining aviation, rail, and road transport GHG emissions (iv) BIO has a certainly reversing impact on the nexus between ETAX and transport sector GHG emissions. Overall, the study highlights that ETAX has a stand-alone ineffective impact in curbing transport sector GHG emissions, but BIO has a certain moderating contribution in this manner. Thus, the study strongly recommends taking further actions, such as more use of BIO as in the case of this study, to support ETAX practices in combating GHG emissions for the EU countries
On the rings whose injective right modules are max-projective
No full textRecently, right almost-QF (respectively, max-QF) rings that is the rings whose injective right modules are R-projective (respectively, max-projective) were studied by the first two authors. In this paper, our aim is to give some further characterizations of these rings over more general classes of rings, and address several questions about these rings. We obtain characterizations of max-QF rings over several classes of rings including local, semilocal right semihereditary, right non-singular right Noetherian and right nonsingular right finite dimensional rings. We prove that for a ring R being right almost-QF and right max-QF are not left-right symmetric. We also show that right almost-QF and right max-QF rings are not closed under factor rings. This leads us to consider the rings all of whose factor rings are almost-QF and max-QF
Meta-analysis of bovine Varicellovirus bovinealpha1 (BoAHV-1) prevalence in Türkiye and economic relevance
No full textBackground: Varicellovirus bovinealpha1 (BoAHV-1) is among the most important infectious agents affecting cattle health and productivity. This study aimed to determine the seroprevalence of BoAHV-1 infection in Türkiye and estimate its economic impact using a meta-analytical approach. Results: A total of 39 studies comprising data from 5,219 animals were included in the meta-analysis. Three analytical groups were established based on sample size and study scale: the small-scale group (SSG), large-scale group (LSG), and herd-level group (HLG). Random effects models were used for prevalence estimation, and heterogeneity was assessed using the Q, I2, and τ2 statistics. Publication bias was evaluated via Egger’s regression and Kendall’s Tau tests. The pooled prevalence was estimated at 0.320 for the SSG group, 0.427 for the LSG group, and 0.356 for the HLG group. The highest level of heterogeneity was identified in the LSG group (I2 = 99.76%). The economic impact of BoAHV-1 was evaluated under two distinct scenarios—one incorporating abortion-related losses and the other excluding them. Principal components of loss included reduced milk production, live weight reduction, delayed onset of first calving, prolonged calving intervals, and losses attributable to aborted calves. The average total economic loss per infected animal was estimated to range from 285.18 to 383.21 USD. Conclusion: These findings suggest a dynamic epidemiological pattern and a potentially high economic burden of BoAHV-1 infection in Türkiye, highlighting the need for effective herd-level control and prevention measures
The effect of intraoperative dexmedetomidine versus ketamine on postoperative pain in patients receiving a femoral nerve block for total knee arthroplasty: a randomized trial
No full textBackground: Postoperative pain control after total knee arthroplasty (TKA) remains challenging. Intraoperative dexmedetomidine and ketamine are commonly used in multimodal analgesia to reduce pain and opioid requirements. This study aimed to compare their effects on opioid consumption, pain, hemodynamics and satisfaction. Materials and methods: This prospective, randomized, double-blind study included 104 adults (≥ 18 years) with ASA I–III status undergoing TKA under spinal anesthesia. After all patients had received spinal anesthesia, they were randomized into two equal groups (n = 52). Group D received dexmedetomidine (1 µg/kg loading dose, then 0.5 µg/kg/h); Group K received ketamine (0.1 mg/kg/h without a loading dose). Sedation level was titrated to achieve a modified Observer’s Assessment of Alertness/Sedation (OAA/S) score of 3–4. Postoperatively, a single-shot femoral nerve block was administered to all patients. Primary outcome was total opioid consumption in 24 h. Secondary outcomes included Visual Analog Scale (VAS) scores, hemodynamic parameters, side effects and patient satisfaction. Results: Tramadol use in 24 h was similar (Group D: 175.29 ± 44.62 mg; Group K: 155 ± 44.48 mg; p = 0.44). VAS scores were comparable at all time points. Time to ambulation was longer in the ketamine group (Group D: 4.4 ± 1.4 h; Group K: 5.3 ± 2.5 h; p = 0.04). Group D showed significantly lower heart rate and blood pressure values at multiple time points (p < 0.001). Patient satisfaction was high in both groups and no hypotension or bradycardia occurred in any group. Conclusion: Although no significant differences were found between dexmedetomidine and ketamine, both agents provided comparable analgesia and opioid consumption, supporting their potential role as adjuvants in multimodal analgesia for patients undergoing TKA. Trial registration: ISRCTN11906298, retrospectively registered on 13.06.2025
Urological Injuries Following Gynecologic and Obstetric Surgery: Incidence, Diagnosis, and Outcomes from a 10-Year Retrospective Cohort
No full textBackground/Objectives: Gynecological and obstetric surgeries carry a risk of iatrogenic urinary tract injuries; however, comparative data on injury patterns, diagnostic timing, and management across different surgical indications remain limited. This study aimed to evaluate the incidence, characteristics, diagnostic timing, and outcomes of urological injuries following gynecologic and obstetric surgeries in a high-volume tertiary referral center over a 10-year period. Methods: This retrospective single-center cohort study included adult female patients who sustained intraoperative or postoperative urological injuries during gynecologic or obstetric procedures between January 2014 and December 2024. Urological injury was defined as bladder, ureteral, or genitourinary fistula injury requiring urological intervention. Patients with prophylactic or temporary ureteral stenting were excluded. Cases were classified into malignant gynecologic, obstetric, and benign gynecologic surgery groups. Injury type, timing of diagnosis, management strategies, and clinical outcomes were analyzed. Results: Among 16,100 procedures, 223 urological injuries were identified (incidence: 1.3%). Bladder injuries were the most common (62.3%) and were predominantly associated with obstetric procedures, whereas ureteral injuries (28.7%) occurred more frequently during malignant gynecologic surgeries (p < 0.05). Intraoperative recognition rates varied significantly by injury type, being highest for bladder injuries (98.6%) and lowest for fistulas (5.0%) (p < 0.001). Conclusions: Surgical indication significantly influences the pattern and timing of urological injuries. Bladder injuries are usually detected intraoperatively, whereas ureteral and fistulous injuries are more often diagnosed postoperatively, particularly in malignant and complex procedures, highlighting the need for targeted intraoperative vigilance and multidisciplinary management in high-risk cases
