Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(4)
- Emirza, Elif Güzide(3)
- Bayrak, Nurten Gülsüm(2)
- Karakan, Mehmet(2)
- Çelik, Ilhan(2)
- Akar, Kubra(1)
- Akçay, Serhatcan Berk(1)
- Albayrak, N.(1)
- Alibabaei Shahraki, Mohammad(1)
- Alver, Ahmet(1)
- Araz, Onur(1)
- Arslan, Ersin(1)
- Atuk Kahraman, Tutku(1)
- Ay, Burak(1)
- Aydin Sayilan, Aylin(1)
- Aydin, Aykut(1)
- Aydin, Kemal(1)
- Aydın, Kemal(1)
- Aygün, Muhammet(1)
- Ayhan, Emre(1)
- Aykan, Ahmet Çaǧrl(1)
- Beder, Murat(1)
- Bekar, Fevziye(1)
- Borlu, Murat(1)
- Bülbül, Ferhat(1)
- Celik, Ilhan(1)
- Celik, N.(1)
- Cevik, U.(1)
- Damla, N.(1)
- Demir, Selim(1)
- Doǧan, Orhan Veli(1)
- Duran, S. Uzun(1)
- Duran, Secil(1)
- Durgutlu, Ahmet(1)
- Efeoglu, Ihsan(1)
- Ekmekci, Dursun(1)
- Erdemir, Fatih(1)
- Göller, Zafer(1)
- Gönül, İlyas(1)
- Kalyon, Ali(1)
Yayınlar
- MakaleYalnız künye2026Determinants of sleep quality and fatigue in patients undergoing hemodialysis
Kazak Salti, Aysun; Topali, Hasret; Türkmen, Osman Oğulcan
Aim: This research aimed to evaluate sleep quality and fatigue among individuals undergoing hemodialysis and to explore the determinants affecting these variables. Methods: This observational investigation was carried out among 78 who were regularly receiving hemodialysis therapy. The research was carried out between May and October 2025 in three different public hospitals among individuals undergoing hemodialysis treatment. Data were gathered using the Patient Information Form (PIF), the Fatigue Severity Scale (FSS), and the Pittsburgh Sleep Quality Index (PSQI). Results: The mean score of the hemodialysis patients on the FSS is 4.97 ± 1.11, and the mean PSQI value is 7.76 ± 3.64. A moderately positive and statistically noteworthy relation was observed between the PSQI and FSS scores. Additionally, a low negative meaningful correlation was seen between ferritin levels and the FSS scores, as well as between calcium levels and the PSQI scores. The use of medications related to chronic disease and the PSQI scores were identified as significant predictors of the FSS scores. Conclusion: Fatigue and sleep quality in individuals receiving hemodialysis treatment are related to each other, as well as to biochemical balance and treatment adherence.
- MakaleYalnız künye2026Electromechanical characterization and deep learning-based force prediction in 3D-printed PLA core–shell composites
Ekmekci, Dursun; Kaplan, Emrah
In this study, composite samples were produced using fused deposition modeling to contain an outer layer of red insulating polylactic acid and an inner core of black conductive polylactic acid. The mechanical properties of the samples were determined using three-point bending experiments, and their electro-mechanical impedance responses during loading were monitored using impedance experiments. To examine the effects of physical aging and crystallization, the composites were heat-treated at 50 °C for 2, 4, and 6 hours. The insulating polylactic acid exhibited brittle fracture with a sharp post-peak force drop, whereas the conductive polylactic acid showed a ductile fracture mode accompanied by substantial energy dissipation. The physically aged composites were stiffer and less ductile, which was attributed to the presence of partially crystallized and partially relaxed molecules, especially around the glass transition region. In support of the observed properties, scanning electron microscopy images confirmed that the fractured layers were smoother compared to the ductile conductive layers, which had surface roughness patterns resembling fibrillated or lamellar structures. Additionally, the impedance signals obtained during the bending experiments were linked with the corresponding mechanical properties using an advanced deep learning model that could model the electric signals to accurately provide the corresponding real-time force values.
- MakaleYalnız künye2026Energy-based wind vibration control of turbines equipped with nonlinear tuned mass damper inerter considering soil-structure interaction
Alibabaei Shahraki, Mohammad; Araz, Onur
This study evaluates the effectiveness of a Nonlinear Tuned Mass Damper Inerter (NTMDI) in mitigating wind-induced vibrations in wind turbines, with explicit consideration of soil–structure interaction (SSI). Kinetic energy is selected as the primary response metric, supported by nacelle displacement, total structural energy, soil energy absorption, acceleration reduction, and residual soil energy to provide a comprehensive assessment. A detailed numerical model is developed in OpenSees, incorporating SSI effects and subjected to turbulent wind loads generated using the Shinozuka method. NTMDI parameters are optimized using the Multi-Objective Cuckoo Search Algorithm (MOCS) to balance kinetic-energy minimization, displacement suppression, and soil-energy management. The results show that NTMDI implementation achieves approximately 45% reduction in total kinetic energy, 20% reduction in nacelle displacement, and 25% reduction in tower acceleration relative to the uncontrolled system. When SSI is considered, the NTMDI further improves performance by reducing soil energy demand by an additional 15–20%, highlighting the importance of absorber–soil coupling. Compared with traditional TMDIs, the NTMDI exhibits superior adaptability and efficiency, particularly for flexible foundations. These findings confirm NTMDIs as an effective passive control strategy for enhancing wind-turbine stability.
- MakaleYalnız künye2026Variable-speed retrofit of a legacy slurry pumping duty: Measured energy reduction with proxy-based operability assessment
Külekçi, Gökhan; Aygün, Muhammet; Göller, Zafer; Yildiz, Onur
Legacy ore beneficiation plants often operate slurry pumps at fixed speed despite variable sump inflow and slurry conditions, which can increase electricity demand and complicate level control. This study evaluates a variable-speed retrofit in which a variable frequency drive was integrated with level feedback and proportional-integral control for a legacy slurry pumping duty. Measured average operating power decreased from 25.6 kW before retrofit to 11.6 kW after implementation, documenting a substantial reduction in electrical demand under the observed operating regime. Because hydraulic-duty data were unavailable for both periods, this result is not presented as a duty-normalised specific-energy reduction. Process interpretation was supported by a bounded proxy framework based on a flowsheet-consistent solids band over 177 days. The proxy analysis linked solids variability to derived slurry density behaviour and operability implications. Overall, the study documents measured electrical-demand reduction and provides a framework for discussing retrofit performance where plant instrumentation is limited.
- MakaleAçık Erişim2025Through the eyes of healthcare professionals: Compassion fatigue and earthquake stress coping strategies of healthcare professionals in the disaster region following the Kahramanmaras centered earthquakes: A case-control study
Emirza, Elif Güzide; Uzun, Sevda; Şenses, Medine
Background: Healthcare professionals serving in the earthquake zone may experience mental problems due to the traumatic events they witnessed. Aim: The aim of this study was to evaluate the effect of working in earthquake-affected areas on compassion fatigue and coping strategies for earthquake stress in healthcare professionals compared to a control group. Methods: This descriptive and correlational study was conducted in three provinces in the northern region of Türkiye. The sample of the study consisted of 146 healthcare professionals working in earthquake-affected regions and 143 healthcare professionals not working in earthquake-affected regions. Data were collected using the ‘Descriptive Information Form’, ‘Compassion Fatigue Short Scale (CF-SS)’, and ‘Coping with Earthquake Stress Scale (CESS)’. Descriptive statistics, t-test for independent samples, Pearson correlation analysis and binary logistic regression analysis were used to analyze the data. Results: Statistically significant differences were found between healthcare professionals working in earthquake-affected regions and healthcare professionals not working in these regions in terms of CF-SS total scores, ‘occupational burnout’ sub-dimension mean scores and ‘seeking social support’ mean scores among CESS sub-dimension mean scores (p <.05). However, no statistically significant difference was found between the mean scores of ‘secondary trauma’ sub-dimension of CF-SS and total-CESS, ‘religious coping’, and ‘positive reappraisal’ (p >.05). A high and positive correlation (r =.805; r =.847; r =.847; r =.695, p <.001) was found between total CF-SS scores and total religious coping, positive reappraisal and seeking social support scores of the participants. In addition, working in the earthquake zone negatively affects positive reappraisal and positively affects seeking social support as a significant predictor (β =.081, OR = 0.922, p <.05; β =.111, OR = 1.117, p <.05). Conclusion: A significant positive relationship was observed between compassion fatigue and coping with earthquake stress. At the same time, it was determined that having worked in the regions affected by earthquakes had a strong positive effect on coping strategies with earthquake stress.
- MakaleAçık Erişim2025Investigation of new mixtures based on natural rubber and nitrile-butadiene rubber for high damping base isolation systems
Çavdar, Özlem; Yıldız, Zeynep; Naghshineh, Ali Karimzadeh
High damping rubber isolators (HDRBs), which are popular in base isolation systems, extend the natural vibration periods of structures and increase the energy dissipation capacity of the systems. Thus, they can protect structures from damage that may occur in earthquakes. The difference between HDRBs and other elastomer bearings is the chemical formulation of the rubber used. The aim of this study is to prepare a new rubber mixture that is resistant to seismic loads and has good damping properties for HDRBs. In this direction, rubber mixtures were prepared with three different formulations. The mixture of ingredients used in this study is Natural Rubber (NR), Nitrile Butadiene Rubber (NBR), Carbon Black (CB), process oil, Zinc Oxide (ZnO), Stearic Acid (StA), coumaron resin, protective agent, sulfur and accelerators. Quadruple shear block specimens were produced with elastomers produced with mixtures. Dynamic tests were performed on these samples. Elastomer earthquake isolation bearings with a damping ratio of 6% or greater are classified as ‘highly damped’. In this study, values greater than 10% were obtained for damping ratio values at 100% shear stresses. Experimental and numerical analyses revealed that the damping values of the compounds developed with NBR-based formulations are at an acceptable level for highly damped isolators. In general, it was observed that the damping properties increased from 6% to 12%. Therefore, it is thought that the developed HDRB compounds can be used as elastomers in the construction of seismic isolators with high damping properties.
- MakaleYalnız künye2025Optimization of steel diffusion bonding processes using the Taguchi method
Serkan Yıldırım, Mehmet; Aydın, Kemal; Kalyon, Ali; Kaya, Yakup
This study examines the diffusion bonding behavior between 316L stainless steel and H13 tool steel, focusing on the effects of key process parameters. Specifically, the influence of bonding pressure, bonding temperature, and holding time on joint quality and mechanical performance is systematically investigated. The Taguchi optimization method was employed to determine the optimal bonding conditions, with shear strength serving as the primary performance indicator. The bonding interfaces were characterized through scanning electron microscopy to analyze microstructural evolution and diffusion behavior. Analysis of variance was conducted to assess the influence of process parameters on shear strength, identifying temperature as the most significant factor. The optimum shear strength was experimentally validated, and a confidence interval was calculated to ensure statistical reliability. The results demonstrated that higher bonding temperatures and moderate pressures led to improved diffusion at the interface, enhancing joint integrity. The findings contribute to a better understanding of the diffusion bonding process and its potential for high-performance applications in aerospace, biomedical, and tooling industries.
- MakaleYalnız künye2025The effect of welding parameters on weld bead geometry in gas tungsten arc welding applications by response surface methodology model
Yildirim, Mehmet Serkan; Ayhan, Emre; Aydin, Kemal; Durgutlu, Ahmet
This study examines the effects of tungsten electrode sharpening angle, torch angle, and arc length on weld bead geometry in gas tungsten arc welding (GTAW). Low-carbon steel plates (4 mm thickness) were welded using ER70S-6 filler wires (2 mm diameter). Experimental analyses and response surface methodology (RSM) revealed that increasing the electrode sharpening angle enhances penetration depth, while reducing the torch angle widens the bead. Longer arc lengths decrease penetration but increase bead width. Validation tests confirmed the accuracy of the RSM models, showing an average deviation of 1.14%. Analysis of variance highlighted the statistical significance of linear, quadratic, and interaction terms in the models. The findings provide critical insights for optimizing GTAW parameters, improving weld quality, and advancing process control, thereby contributing both practical and academic value to welding research.
- MakaleYayıncıda açık erişim2025The effect of health literacy, psychological resilience, and internet addiction levels on the fear of COVID-19 in healthcare professionals
Aydin, Aykut; Aydin Sayilan, Aylin; Kulakac, Nursen
Background: Healthcare professionals are known to make intensive use of the internet to improve their health literacy, preserve their psychological resilience, resolve uncertainties, and lessen their fear of COVID-19. Although several studies have addressed these concepts, we encountered none examining their relationships with one another. Objective: This research set out to determine the effects of health literacy, psychological resilience, and internet addiction levels on the fear of COVID-19 in healthcare professionals. Methods: The sample in this descriptive, cross-sectional, and correlation-seeking research consisted of 456 health workers. The data were collected using an information form and the Health Literacy Scale (HLS), the Brief Resilience Scale (BRS), Young's Internet Addiction Test-Short Form (YIAT-SF), and the Fear of COVID-19 Scale. Results: The mean age of the health professionals enrolled in the research was 40.80 ± 11.39 years (min 22, max 68), 52.4% were women, 87.1% held bachelor's degrees, 86.8% were married, and 5.9% were working as nurses. The participants’ mean scale scores were 54.97 ± 5.62 for the HLS, 26.95 ± 9.57 for YIAT-SF, 20.57 ± 3.62 for the BRS, and 20.33 ± 2.97 for the Fear of COVID-19 Scale. Conclusions: The healthcare professionals in this study exhibited adequate levels of health literacy and psychological resilience, a moderate level of internet addiction, and still experienced fear of COVID-19. Health literacy, internet addiction, and psychological well-being emerged as important factors in the fear of COVID-19.
- MakaleAçık Erişim2025Navigating stress with creativity: The moderating role of conflict-induced creativity on job satisfaction among entrepreneurs
Özsungur, Fahri; Bekar, Fevziye
Background: Entrepreneurs frequently encounter high levels of job stress, which can undermine their job satisfaction. Although the negative consequences of stress are well-known, less attention has been paid to the role of Conflict-Induced Creativity in buffering these effects. Objective: This study investigates how Conflict-Induced Creativity moderates the relationship between job stress and job satisfaction among entrepreneurs, addressing a gap in understanding adaptive mechanisms in high-pressure work environments. Methods: Using a quantitative design, data were collected from 453 entrepreneurs through convenience sampling. Statistical analyses included factor analyses, correlations, regressions, and moderation testing via PROCESS MACRO in SPSS v.22. Results: Validated scales assessed job satisfaction (α = 0.934), job stress (α = 0.919), and Conflict-Induced Creativity (α = 0.832). Job stress negatively predicted job satisfaction (β = −0.126, p < 0.001), while Conflict-Induced Creativity emerged as a strong positive predictor (β = 0.688, p < 0.001). Moderation analysis confirmed that Conflict-Induced Creativity significantly buffered the adverse effects of stress on satisfaction (b = 0.147, 95% CI [0.048, 0.245], p < 0.05). Conclusion: Conflict-Induced Creativity plays a protective role in stressful entrepreneurial contexts. Practically, fostering a work culture that supports Conflict-Induced Creativity can enhance resilience and job satisfaction among entrepreneurs, offering actionable insights for leadership development, training programs, and organizational policy.
- MakaleYalnız künye2025Effectiveness of psychosocial interventions in eating disorders: A meta-analysis study
Bayrak, Nurten Gülsüm; Uzun, Sevda
Background: Psychosocial interventions are an essential component in the treatment of eating disorders that can negatively affect both mental and physical health. Aims: This study was conducted to determine the effect size of psychosocial interventions in eating disorders. Methods: For this meta-analysis study, researches were obtained by searching PubMed, Web of Science, EBSCO host, Google Scholar, and YÖK Thesis Centre databases in August to September 2024 without any year limitation. After the reviews, 15 studies were included. The data were synthesized by meta-analysis and narrative methods. Results: In this meta-analysis, psychosocial interventions in eating disorders were found to improve depression (SMD = −0.371, 95% CI [−0.697, −0.045]; Z = −2.228, p = .026); stress (SMD = −0.545, 95% CI [−1.080, −0.011]; Z = −1.999, p = .046); self-control (SMD = 0.476, 95% CI [0.116, 0.835]; Z = 2.594, p = .009); and emotional eating (SMD = 0.224, 95% CI [−4.305, −0.164]; Z = −2.115, p = .034). Discussion: The results of the study showed that psychosocial interventions in eating disorders are effective in disease symptoms (depression, stress, self-control, and emotional eating). In addition to psychopharmacological treatment, psychosocial interventions should be included in the treatment of eating disorders.
- MakaleAçık Erişim2025Investigation of perceived parental attitude in children exposed to sexual abuse: A case-control study
Bayrak, Nurten Gülsüm; Emirza, Elif Güzide; Uzun, Sevda
Background: The enduring impact of children being subjected to sexual abuse is characterized by lasting traumatic effects. Aims: This study aims to assess the influence of perceived parental attitudes on the incidence of sexual abuse in children who have experienced such abuse, comparing them with a control group. Methods: The research took place at the Child Advocacy Center (CAC) of a hospital in northern Turkey and in the pediatric outpatient clinics of the same institution. The study evaluated 101 children who were exposed to sexual abuse and 100 children who were not. Data collection took place between November 2022 and August 2023. The study employed a ‘Descriptive Information Form’ and the ‘Parental Attitude Scale’ for both case and control groups. The t-test for independent samples, descriptive statistics, and logistic regression analysis were used for data analysis. Results: Analysis of scores from the Parental Attitude Scale revealed significantly lower mean scores in acceptance-involvement and strictness-supervision in the case group (p <.05). The mean scores for ‘acceptance-involvement’ (X¯ = 22.82 ± 6.26, X¯ = 25.71 ± 3.89) were highest in the case and control groups. Neglectful attitude (38.6%) was more prevalent in the case group, while the control group exhibited a higher frequency of democratic attitude (37%). In terms of predictors, acceptance-involvement (OR = 1.091, p =.005) and maternal employment (OR = 4.410, p <.001) were identified as the most significant predictors of exposed to sexual abuse. The study’s Cronbach’s alpha value for the scale was α =.743. Conclusion: The study’s findings on parental attitudes suggest a potential connection between children’s exposure to sexual abuse and inadequate parental acceptance, involvement, supervision, and control.
- MakaleAçık Erişim2025The effect of high SiC ratio on the physical, mechanical, tribological and corrosion behavior of Al2024 alloy matrix composites fabricated by powder metallurgy
Beder, Murat; Varol, Temel; Akçay, Serhatcan Berk; Çuvalcı, Hamdullah; Erdemir, Fatih; Khan, M Adam; Yıldız, Uğur Temel
Reinforcing materials used in the production of metal matrix composites are used to improve the properties of the final composite. However, the compatibility between matrix and reinforcement and the reinforcement ratio directly affects the properties of the composite material. For this reason, low reinforcement ratios are preferred in many studies on ceramic particle reinforced composites. Unlike conventional studies, in this study, the effects of 10 wt%, 20 wt% and 40 wt% SiC content on the microstructure, dry wear properties and corrosion properties of Al2024 matrix composites were investigated. θ phase content became higher as the SiC content was increased. Hardness values increased with increasing SiC reinforcement. The highest value (307.68 HB) was obtained for the composite with 40 wt% SiC reinforcement, an increase of more than 100%. A decrease in volume loss with increasing SiC reinforcement was observed in the friction and wear tests. For 5 N of load and 1200 m of sliding distance, it was found that an addition of 40 wt% of SiC particles in Al2024 matrix results decrease in volume loss by almost 722%.
- MakaleYalnız künye2025The interaction between the Mediterranean diet, obesity, and disease severity: A case–control study on psoriatic patients
Konyalıgil Öztürk, Nurefşan; Kurtbeyoğlu, Emine; Atuk Kahraman, Tutku; Çiçek, Betül; Çınar, Salih Levent; Borlu, Murat
Background: Psoriasis is a chronic inflammatory disease that can be influenced by nutritional status and dietary habits. In particular, adherence to the Mediterranean diet, known for its anti-inflammatory properties, is increasingly being investigated in relation to disease severity and nutritional status. Aims: This case–control study, including 50 psoriatic patients and 40 healthy controls, aimed to examine the correlation between adherence to the Mediterranean diet and disease severity, nutritional status, and disease presence in patients with psoriasis. Methods: The clinical severity of psoriasis was assessed using the Psoriasis Area and Severity Index (PASI) score. Anthropometric measurements were taken, and body composition was determined using bioelectrical impedance analysis. All participants’ Mediterranean Diet Adherence Screener (PREDIMED) scores and 24-h food consumption records were evaluated. Results: The body weight (BW), waist circumference (WC), hip circumference (HC), and fat mass (FM) values of psoriatic patients were found to be significantly higher than those of the healthy control group (p < 0.05). The PREDIMED score of psoriatic patients was found to be significantly lower than that of the control group (p < 0.001). A negative correlation was observed between the PREDIMED score and BW, FM, and HC (p < 0.05). PASI levels decreased as PREDIMED scores increased (r = −0.314, p = 0.048). According to logistic regression analysis, after adjusting for age and sex, the likelihood of being healthy was approximately 6.363 times higher in those with high adherence to the Mediterranean diet (p < 0.001). Conclusion: When psoriatic patients were compared with healthy controls, significant differences were observed in PREDIMED scores. Notably, greater adherence to the Mediterranean diet was associated with reduced disease severity, suggesting a potential mitigating effect even in the presence of obesity.
- MakaleAçık Erişim2024Psychosocial dimensions of being a child in women’s shelters: A phenomenological study on the experiences of battered women – A case study from Türkiye’s Northern Region
Uzun, Sevda; Emirza, Elif Güzide
Background: Violence against women has numerous devastating effects. Exposure to violence not only impacts women but also affects their children both physically and psychosocially. Aims: The study aimed to evaluate the psychosocial problems of children living with their mothers in women’s shelters from the mothers’ perspective with a phenomenological approach. Methods: Utilizing the phenomenological research method, semi-structured in-depth interviews were conducted with 14 individuals in a women’s shelter in a province in northern Türkiye. The criterion sampling method, a purposive sampling technique, was employed to select participants. Interviews continued until data saturation was achieved. All interviews were audio recorded and then transcribed, and thematic analysis was applied to analyze the data. The study adhered to the COREQ checklist for reporting. Results: The data analysis revealed four main categories (effects of violence on the mother, actions taken to protect children from violence, effects of violence and staying in a shelter on the child, and psychosocial needs for the protection of the child’s mental health in the shelter) and 10 sub-themes (psychological effects, physical effects, social effects, domestic actions, organizational actions, psychological effects, physical effects, social effects, support system, and coping). Conclusion: The study concluded that violence significantly impacted the mental, physical, and social well-being of both women and children, posing challenges to their ability to cope with the aftermath. Women exerted considerable effort in protecting their children from violence, and they needed psychosocial support to ensure the well-being of their children’s mental health during their stay in shelters.
- MakaleYalnız künye2023Determination of shear behavior of magneto-rheological elastomers under harmonic loading
Mazlum, Ugur; Celik, Ilhan
Magneto-rheological (MR) materials can respond reversibly and quickly under the effect of an external magnetic field. MR materials contain micron-sized iron particles. These iron particles are typically dispersed in an elastomer or a liquid. These materials due to their properties constitute a kind of smart material in terms of engineering material. Such materials are used as isolators in various engineering applications, structures, and sound control subsystems. This study aimed to determine the mechanical properties for shear behavior of MR materials for under harmonic loading. Parameters such as matrix materials with different hardness values, powder types, magnetic field, frequency, and deformation were studied. The parameters related to the MR material itself were analyzed with the obtained data. The present study reveals that considering the sensitivity to magnetic field parameter, composite materials having the most suitable properties were produced with Shore 2 hardness value and SQ magnetic powder. It had been observed on increase about 200% at the rate of Shore A10 and A2 as a result of comparing the hardness scale. Also according to the powder rate while there was an increase on worth effect of relative MR, it is seen that the biggest increase had been in SQ powder with 199% worth. When looked some studies in literature, about comparing different hardness values such as matrix materials powder types etc. there aren’t any studies. The state of magnetic field thinks that features such as MR effect, Storage, and Loss modulus haven’t been examined yet.
- MakaleAçık Erişim2022Optimization insulation thickness and reduction of CO2 emissions for pipes in all generation district heating networks
Terhan, Meryem
District heating systems are provided solutions for the increasing energy problems in high-population cities. Energy costs go up depending on increasing heat loss in DHS's distribution network. Heat loss from the network consists of 5–20% of transferred energy, and this loss is higher than the other losses in the heating system. In the study, heat losses from the pipes such as supply-return pipes, hot water and circulation pipes into heat canals are investigated based on energy, exergy, economic and environmental. Optimum insulation thicknesses, energy savings, reduction of CO2 emissions, the first investment costs and payback periods of the pipes in the network of all-generation district heating systems are investigated by using Life Cycle Cost Analysis (LCCA) method for fuel types like natural gas, fuel oil and coal. Optimum insulation thicknesses are calculated for different nominal sizes of pipes and various insulation materials such as glass wool, and rock wool for the different climatic zones. According to the results of the study, the heat losses from pipes in the 4th generation DHS network are decreased between 38.19% and 33.33% from the warmest climate zone to the coldest climate zone according to the 3rd generation. Energy savings, reduction of CO2 emissions, payback periods and optimum insulation thickness values of supply and return pipes in the network are respectively changed between 7.80–98.86 $/m, 39.61–322.32 kg CO2/year, 0.028–0.38 years and 0.025–0.0105 m depending on various fuel types, insulation materials, nominal size pipes, climatic zones and all generation types.
- MakaleYalnız künye2022Evaluation of the relationship between health literacy and self-efficacy: A sample of hemodialysis patients
Kazak, Aysun; Özkaraman, Ayşe; Topalı, Hasret; Duran, Secil
Purpose: The aim of this study was to evaluate self-efficacy and health literacy of patients undergoing hemodialysis, to investigate the relationship between health literacy and self-efficacy, and to determine the factors affecting self-efficacy. Methods: The study was conducted in Eskisehir and Gumushane state hospitals affiliated to the Public Hospitals Association with the participation of 198 patients receiving hemodialysis treatment for chronic renal failure. The inclusion criteria were as follows: being ⩾18 years old, receiving hemodialysis, and agreeing to participate in the study. The study data were collected using face-to-face interview technique, and they were analyzed using descriptive statistics, correlation, and regression analysis. Results: The mean age of the patients was 59.73 ± 16.32 years. Of the patients, 46% were primary school graduates, and 63.6% reported having other chronic diseases. The mean health literacy and self-efficacy scores were found to be 79.43 ± 26.09 and 23.98 ± 7.42, respectively. The results showed that the self-efficacy scores of the patients increased as the general health literacy scores increased, with a strong linear correlation between these variables (r = 0.712; p ˂ 0.001). Patients with advanced age, low educational level, and widowed patients had lower self-efficacy and health literacy scores than others (respectively eta2 = 0.263, 0.116, 0.268, 0.141). Conclusion: High score of health literacy positively affects the self-efficacy score of hemodialysis patients.
- MakaleYalnız künye2021The effect of metalation processes on polymer morphology and conductivity properties
Sarıbıyık, Oğuz Yunus; Gönül, İlyas; Ay, Burak; Karaca, Serkan
In this work, an insoluble three dimensional (3D) porous polymeric structure and their metal complexes were synthesised by the condensation reactions of meta(m)-phenylenediamine, para(p)-phenylenediamine and glutaraldehyde. The morphological and spectral features of the porous polymeric structures were determined using different analytical and spectroscopic methods, including field emission scanning electron microscopy, four-point probe electrical conductivity, photoluminescence spectroscopy, Fourier-transform infrared spectroscopy, surface area Brunauer–Emmett–Teller and magnetic and thermal behaviours. According to the obtained data, the shape, size and photoluminescence properties of the compounds, especially the conductivity, were clearly changed after the metalation processes.
- MakaleYalnız künye2019Ethical sensitivity, burnout, and job satisfaction in emergency nurses
Palazoğlu, Cansu Atmaca; Koç, Zeliha
Background: Rising levels of burnout and decreasing job satisfaction can inhibit healthcare professionals from providing high-quality care due to a corresponding decrease in their ethical sensitivity. Aim: This study aimed to determine the relationship between the level of ethical sensitivity in emergency service nurses and their levels of burnout and job satisfaction. Research design: This research employed a descriptive and cross-sectional design. Participants and research context: This study was conducted with a sample of 236 nurses, all of whom worked in emergency service between 24 July 2015 and 28 April 2016. Data were collected using the Moral Sensitivity Questionnaire, Maslach Burnout Inventory, and Minnesota Job Satisfaction Scale. Ethical considerations: This study was approved by the Institutional Ethics Review Board of Ondokuz Mayıs University. Findings: There was a weak and negative correlation (r = –0.158, p = 0.015) between Moral Sensitivity Questionnaire and Maslach Burnout Inventory scores. There was also a weak and negative correlation (r = –0.335, p < 0.001) between the Maslach Burnout Inventory and Minnesota Job Satisfaction Scale scores. Discussion and conclusion: Decreased job satisfaction and increased burnout levels among emergency service nurses might result in them indulging in improper practices, frequently facing ethical problems, and a decrease in the overall quality of service in hospitals. In order for emergency service nurses to recognize ethical problems and make the most accurate decisions, a high level of ethical sensitivity is critical. In this respect, it is suggested that continuing education after graduation and training programs should be organized.