Gümüşhane University Institutional Repository
Not a member yet
5821 research outputs found
Sort by
The effect of perceived scarcity of staple goods on stockpiling behaviour and impulse purchase intention and the mediating role of social media
No full textThe research’s goal in this setting is to uncover the effects of consumers’ perceived scarcity of staple goods on impulse buy intention and stockpiling behaviour, as well as to determine the function of social media posts in mediating these effects. 594 consumers who had recently purchased staple goods from grocery stores participated in the survey. As a result of the structural equation model analysis, it was determined that perceived scarcity of staple goods has a positive effect on impulse purchase intention, stockpiling behaviour and social media. Finally, it was also determined that social media sharing has a mediating role on the effect of perceived scarcity of staple goods on impulse purchase intention and stockpiling behaviour. The findings obtained provide important theoretical and practical contributions. Copyright © 2025 Inderscience Enterprises Ltd
Suicide attempts history and affecting psychosocial challenges in individuals with substance use disorders: A qualitative study from a rural region of Türkiye
No full textObjective: This study aimed to evaluate the suicide attempts histories and affecting psychosocial challenges in individuals with substance use disorders (SUD). Methods: This study was conducted between August and October 2023 using an inductive qualitative design. Purposive sampling method was used to reach the sample group. The study included individuals with substance use disorders who had attempted suicide at least once. They were being treated at an Alcohol and Substance Addiction Treatment Center in the eastern region of Türkiye. Interviews continued until data saturation was achieved with 13 participants. All interviews were audio recorded and then transcribed. The research adhered to the COREQ checklist. Results: Three main themes (etiological factors in SUD, challenges in coping with SUD and suicide) and ten sub-themes (family-based factors, environmental factors, traumatic experiences, personal factors, psychological, physical, and social factors, the causes and methods of substance use, and emotions) emerged in the analysis of the data. Conclusion: Given the connection between substance use and suicide, it is crucial to recognize and comprehend the increased risk of suicide among individuals with SUD and identify potential comorbid disorders and accompanying mental health issues. Psychiatric and mental health nurses can use effective psychosocial interventions to impart knowledge related to SUD management, organize grouptherapy (i.e., peer support), perform to ensure continuity of treatment and improve individuals' self-management skills. © 202
Characterization of thermal, chemical, mechanical, and fatigue behavior of 3D printed ABS-based elastomeric blends: ABS/EVA and ABS/TPU
No full textThe polymer blending method is widely used to obtain balanced mechanical properties and structural performance in many engineering applications. This study investigates the influence of Ethylene-Vinyl Acetate (EVA), and Thermoplastic Polyurethane (TPU) composition ratios on the thermal, chemical, viscoelastic, mechanical, and fatigue life behavior of Acrylonitrile-Butadiene-Styrene (ABS) based elastomeric blends. For this purpose, structural and mechanical properties of the blend material depending on their composition ratio were carried out through a series of characterization analyses, and tensile and fatigue tests. The findings indicated that ABS/EVA and ABS/TPU blends formed an immiscible structure. In addition, it was determined that the storage modulus of the blend with 10 % TPU improved because of the presence of new absorption peaks in the structure. The mechanical properties such as elastic modulus, yield strength, and ultimate tensile strength decreased concerning neat ABS with an increase in the EVA and TPU composition ratio for blend materials. However, the elongation to break was achieved approximately 6 times increasing with an increase in the TPU ratio for ABS/TPU blends. It was determined that the fatigue strength value in ABS/EVA and ABS/TPU blends decreased with the decrease in ABS composition ratio in the blend system. However, it was found that fatigue life improved by 25 % compared to ABS at low-stress amplitude for 10 % TPU additive. Finally, it can be revealed that the ABS-based elastomeric blends can be used to obtain desired properties according to their composition ratios for different applications. © 2025 The Author
Cardiovascular Findings and Effects of Caffeine on Experimental Hypothyroidism
No full textBackground: Thyroid hormone deficiencies can disrupt organ functions, significantly impacting the cardiovascular system. Recently, the effects of thyroid hormones on the heart have garnered increased attention. However, most studies are conducted on humans using clinical data, while cellular-level and experimental studies remain limited.
Objective: This study aimed to investigate the cardiovascular implications of hypothyroidism and evaluate the impact of caffeine on cardiac health in rats induced with hypothyroidism using propylthiouracil (PTU).
Methods: The study involved 60 rats divided into six groups. Group 1 served as the untreated control. Group 2 received PTU for two months to induce hypothyroidism. Group 3 received PTU for one month, followed by caffeine for one month. Group 4 received caffeine for two months. Group 5 received both PTU and caffeine simultaneously for two months. Group 6 received PTU for one month, followed by one month under normal conditions.
Results: During necropsy, normal thyroid glands were observed in Groups 1, 4, and 6, enlarged thyroids in Group 2, and smaller thyroids in Groups 3 and 5. Microscopic examination revealed varying thyroid histologies: Group 2 showed significant epithelial cell proliferation and absent colloid, while Groups 3, 5, and 6 had altered yet colloid-containing acini. Macroscopic inspection of hearts appeared normal across all groups. However, histopathological examination revealed significant hyperemia and microhemorrhages in Group 2, contrasting with normal findings in other groups. Immunohistochemical analysis indicated reduced cardiac troponin expression in Group 2, while other groups maintained prominent expression. Additionally, Group 2 displayed increased serum TSH levels and decreased T3 and T4 levels.
Conclusions: The findings suggest that administering caffeine alongside or after PTU treatment in rats with experimentally induced hypothyroidism may ameliorate thyroid and cardiac irregularities. This study indicates caffeine's potential in mitigating the adverse effects of hypothyroidism on thyroid and heart health.3980696
Adoption of AI-based order picking in warehouse: benefits, challenges, and critical success factors
No full textThis research assesses the adoption of artificial intelligence (AI)-based batch order picking in a warehouse, focusing on benefits, challenges, and critical success factors. Using customer order data and simulation, the study employs a quantitative approach, combining mathematical and statistical estimations with qualitative examinations centered on interviews with the warehouse staff, its Enterprise Resource Planning (ERP) developer, and the AI developer. The findings of this mixed-method study reveal that the AI-based order-picking system (AI-based system) has improved order-picking efficiency by reducing travel distance and time. Nevertheless, challenges hinder maximum utilization of the system. In addition, the research highlights critical success factors and other benefits of adopting the system tailored to warehouse management. Understanding the lessons learned in this research is essential for businesses seeking to adopt AI to enhance their efficiency. © The Author(s) 2025
Investigation of fractional order covid-19 model with q-homotopy analysis transform method
No full textThe primary objective of this paper is to derive approximate analytic solutions for the time fractional-order Covid-19 model by employing the q-homotopy analysis transform method (q-HATM) and the Laplace transform homotopy perturbation method (LT-HPM). The covid 19 model is a system of five-dimensional nonlinear ordinary differential equations. Moreover, this method applies even to more complex partial differential equations originating from mathematical biology, demonstrating computational efficiency and wide application. In this study, Caputo fractional derivative is used to obtain the fractional system and Laplace transformation is applied to analyze the approximate solutions of the system. Graphical results are presented and discussed quantitatively to illustrate the approximate solution. Copyright 2021, Yıldız Technical University
Synthesis, Characterization, Biological Properties, and Sensor Applications of Novel Thiosemicarbazone Derivatives
No full textIn this study, novel thiosemicarbazone derivative molecules (5a-j) were synthesized. The characterization of the synthesized molecules was carried out using 1H-, 13C-NMR, FT-IR, and Q-TOF spectroscopic techniques. Then, the inhibitory effect of these compounds was examined for human carbonic anhydrase I and II (hCA I, and II) and acetylcholinesterase (AChE). The hCA I II, and AChE were efficiently inhibited by synthesized thiosemicarbazone derivatives, with Ki values in the range of 0.293-1.666 µM for hCA I, 0.298-1.332 µM for hCA II, and 52.51-138.63 µM for AChE, respectively. Finally, the sensor properties of the synthesized thiosemicarbazone derivatives were investigated. The newly synthesized thiosemicarbazone derivative molecules exhibited high selectivity towards Pb2+ ions. The sensor prepared with 5a from these molecules had a Nernstian behavior of 28.8 ± 1.5 mV/decade and a low detection limit of 2.86 × 10-6 M in a wide concentration range of 1.0 × 10-1-1.0 × 10-5 M. The newly proposed sensor also had a wide pH working range (5.0-10.0), a very fast response time (5 s), and good reproducibility. The newly fabricated sensors were used as indicator electrodes for the potentiometric titration of Pb2+ ions with ethylenediaminetetraacetic acid (EDTA) and were successfully applied for the determination of Pb2+ ion content in different water samples.4048505
Technological Products in Cancer Care: Challenges for Nurses and Patients
No full textNo abstract available4053704
The Efficacy of Nurse-Delivered Psychosocial and Psychotherapeutic Interventions for Individuals With Mental Health Issues: A Meta-Analysis of Randomised Controlled Trials
No full textBackground: Nurses are among the most interactive professionals in society, providing both care and psychosocial and psychotherapeutic interventions for individuals with mental health issues. Nurse-centred approaches have demonstrated a positive impact on addressing mental health issues.
Aim: This study aimed to evaluate the effectiveness of psychosocial and psychotherapeutic interventions administered by nurses in managing mental health issues.
Methods: For this meta-analysis, data were gathered through a comprehensive search of databases, including PubMed, Web of Science, EBSCOhost, Google Scholar and the YÖK Thesis Center, with no restrictions on publication year. Following the review process, a total of 25 studies were included in the analysis. The PRISMA checklist was employed to guide our study.
Results: The meta-analysis revealed that interventions implemented by nurses in the context of mental health were effective. Specifically, the psychosocial and psychotherapeutic interventions significantly reduced depression levels in individuals (SMD: -0.918, 95% CI: -1.350 to -0.486; Z = -4.161; p < 0.05) and anxiety levels (SMD: -0.61, 95% CI: -1.190 to -0.029; Z = -2.59; p < 0.05). Additionally, these interventions were associated with an improvement in individuals' quality of life (SMD: 0.673, 95% CI: 0.303-1.403; Z = 3.56; p < 0.05).
Conclusion: Nurses can play a pivotal role in addressing mental health issues, effectively contributing to the reduction of anxiety and depression levels while enhancing the overall quality of life for individuals.4046903
Perioperative stress experiences of patients before surgical operation: A phenomenological study
No full textAim: The aim of this study was to evaluate patients' experiences of perioperative stress before surgery using a phenomenological approach. Design: In the study, in which phenomenological research method was used, semi- structured in-depth interviews were conducted with 12 patients who were treated in the orthopedics clinic. Method: Criterion sampling method, one of the purposive sampling methods, was used to reach the sample group. Interviews continued until data saturation was achieved. All interviews were recorded on a voice recorder after obtaining the necessary permissions and then transcribed. The data of the study were evaluated using thematic analysis. The study was conducted and reported according to the COREQ checklist. Results: In the analysis of the data, three main themes (situations experienced before the surgical operation, feelings and thoughts about the operating room, and perioperative stress and thoughts about healthcare professionals) and seven sub-themes (mental, physical, social, emotions, thoughts, positive thoughts and negative thoughts) were identified. Conclusion: It was found that patients experienced many psychosocial difficulties, especially fear and anxiety, in the preoperative period. It can be said that the difficulties experienced are related to both the surgical process and the operating room environment and the communication and interaction of healthcare professionals. In this context, determining the fear and anxiety levels of patients in the preoperative process, providing standardized comprehensive trainings to patients in order to prevent different practices related to the surgical process, organizing in-service trainings to strengthen the communication skills of healthcare professionals are very important for the healthy management of the process and providing holistic nursing care. © 2025 Elsevier Inc.10048