Kırşehir Ahi Evran Üniversitesi Kurumsal Akademik Arşivi
DSpace@Kırşehir, Kırşehir Ahi Evran Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisimi artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Second order neutral delay differential equations: on oscillation via linearization
(American Institute of Mathematical Sciences, 2026) Temtek, Pakize; Kılınç Geçer, Nagehan
This paper investigates the oscillatory behavior of second-order neutral differential equations with a continuously distributed delay. New monotonic characteristics of non-oscillatory solutions of the considered neutral delay differential equation are established. We obtain new oscillation criteria by using these properties to linearize the problem and applying the comparison principle. The corresponding proofs are established under the canonical assumption. The results in this paper improve and generalize some known results in the existing works. Finally, numerical validation via illustrative examples are provided.
The ethical and clinical conflict of cardiopulmonary resuscitation (CPR) in the emergency department: futile interventions
(BioMed Central Ltd, 2026) Sultanoğlu, Hasan; Köken, Arif Hüdai; Topçu, İbrahim; Hallaç, Hamza Tahir
Objective: Scientific and technological advancements have significantly contributed to increased life expectancy; however, unresolved debates persist regarding quality of life and the dying process. Cardiopulmonary resuscitation (CPR) performed on terminal patients in the emergency department remains a subject of clinical and ethical controversy. This study aims to evaluate the ethical conflicts faced by physicians when making decisions about potentially futile treatments in emergency settings. Materials and methods: This study was conducted in the emergency department of a university hospital in Türkiye and consisted of two phases. In the first phase, 118 cardiac arrest cases were analyzed among 446,397 patients who presented to the emergency department between 2020 and 2025. In the second phase, emergency physicians were surveyed regarding their decisions to initiate or terminate CPR. Results: According to the findings, the average age of patients who responded to CPR was 65.54 ± 13.49, whereas non-responders were significantly older. Although the majority of physicians believed that discontinuing CPR is ethically inappropriate, 98% were able to accurately predict cases in which CPR would be futile. Among physicians who refrained from terminating CPR despite anticipating non-responsiveness, the most frequently cited reasons included “concerns over legal, ethical, and professional responsibilities” (79.3%), followed by “social pressure (risk of violence or complaints)” (75.9%), and “noncompliance with religious and cultural beliefs” (69%, n = 20). Conclusion: Physicians’ reluctance to terminate futile treatment is influenced by legal and ethical responsibilities, social pressures, religious beliefs, and empathy. The study highlights the ethical and clinical conflicts faced by physicians in decisions regarding futile CPR and emphasizes the need for multidisciplinary approaches and ethical guidelines in such cases. Additionally, providing family members with clear information about the likely outcomes of CPR may facilitate ethical decision-making.
Mitochondrial COI and cytb Characterisation of K-Lineage Varroa destructor Isolates From Kastamonu, Türkiye
(John Wiley and Sons Inc, 2026) Atelge, Mübeccel; Ercan, Nuri; İnci, Abdullah; Yıldırım, Alparslan
Background: Varroa destructor is the most important ectoparasitic mite of the western honeybee (Apis mellifera) and remains a major threat to apiculture worldwide. Molecular characterisation of local mite populations is essential for understanding lineage composition and for establishing sequence-based epidemiological baseline data. Objectives: This study aimed to determine the haplotypes and phylogenetic relationships of representative V. destructor isolates collected from Kastamonu Province in the Western Black Sea region of Türkiye using mitochondrial COI and cytb markers. Methods: A total of 100 adult female mites were collected from 10 locations, and one representative high-quality isolate from each locality (n = 10 per locus) was selected for bidirectional sequencing. Partial mitochondrial COI and cytb regions were amplified by PCR and sequenced. Consensus sequences were compared with GenBank records using BLASTn, and separate comparative datasets were constructed for each marker. Multiple-sequence alignments were generated with MAFFT, substitution models were selected with ModelFinder, and phylogenetic relationships were inferred using Maximum-likelihood and Bayesian approaches. Results: All sequenced Kastamonu representatives were completely identical within each marker, indicating mitochondrial homogeneity among the analysed isolates. In both the COI and cytb datasets, the study isolates clustered within the invasive K (Korean) lineage of V. destructor. In the COI analysis, the Kastamonu sequence grouped clearly with K-lineage references and separately from J-lineage sequences. The cytb analysis supported the same lineage assignment and likewise revealed no local mitochondrial subdivision within the sequenced representative subset. Comparative diversity analyses showed that, although the broader global datasets retained regional variation, the Kastamonu isolates analysed in this study were represented by a single mitochondrial background at both loci. Conclusion: The representative V. destructor isolates analysed from Kastamonu were identical at both mitochondrial markers analysed and belonged exclusively to the invasive K-lineage. These findings provide sequence-based confirmation of the maternal lineage detected among the sequenced mites and establish a regional molecular baseline for future surveillance of V. destructor populations in Türkiye. However, these findings should be interpreted within the limits of the representative sequencing design and should not be considered a definitive estimate of population-wide genetic diversity.
Effectiveness of an Internet-Based Guided Self-Help CBT Program for Reducing Procrastination in University Students: A Quasi-Experimental Pilot Study
(ODTU, 2026) Avşar, Fadime; Baltacı, Önder; Özer, Ömer
This study was conducted using a quasi-experimental pilot study design to evaluate the effects of an Internet-Based Guided Intervention Program (Ertele-Me) on university students' procrastination behaviors, time management, and levels of depression, anxiety, and stress. The program consists of five Cognitive Behavioral Therapy (CBT)-based modules focusing respectively on psychoeducation about procrastination, self-regulation and time management skills, cognitive interventions, behavioral strategies, and maintenance of gains. Seventy-two students applied to participate in the study, and 26 eligible participants were assigned to either the experimental (N = 13) or control (N = 13) group. While the experimental group received a five-week internet-based guided intervention, the control group was informed that the intervention would begin at a later date. Data were collected using the Tuckman Procrastination Scale (TPS), the Depression, Anxiety, and Stress Scale (DASS-21), and the Time Management Questionnaire (TMQ). Findings indicated a significant reduction in procrastination behaviors and an improvement in time management skills within the experimental group. However, no statistically significant difference was observed between the post-test scores of the two groups. These preliminary findings suggest that internet-based guided self-help programs are promising tools for supporting the academic development of university students. Further research with larger samples and more rigorous methodological designs is recommended. This study was registered and completed as a clinical trial in the ClinicalTrials.gov database under registration number NCT06278142.
Hadis Tarihi Araştırmalarında Yeni Bir Demografik Yaklaşım: Ulema Nüfus Sayım Modeli
(Hitit University, 2026) Çinici, Orhan
[Abstract Not Available]
