Scopus İndeksli Yayınlar Koleksiyonu
Bu koleksiyon için kalıcı URI
Güncel Gönderiler
Öğe Effect of plant-based diets on rheumatoid arthritis: a systematic review(Oxford University Press, 2025) Bostan, Zekiye Zeynep; Sare Bulut, Melike; Özen Ünaldı, Buket; Albayrak Buhurcu, Ceren; Akbulut, GamzeContext Rheumatoid arthritis (RA) is an autoimmune disease that leads to chronic inflammation and joint damage. Various plant-based diets are thought to have effects on RA symptoms and disease activity.Objective Relevant literature on the effect of different types of plant-based diets on RA was reviewed.Data Sources A systematic search was conducted using the Web of Science, PubMed, Scopus, and Cochrane databases and following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.Data Extraction Articles on observational and interventional human studies carried out in the adult population and published in English between February 2013 and April 2023 were eligible for inclusion. Articles reporting on studies performed in populations under 18 years of age, with unclear methods and results, or for which the full text was unavailable were excluded. The risk of bias in the selected studies was assessed using the Joanna Briggs Institute checklists.Data Analysis Of 547 screened articles, 15 were included, comprising 4 cross-sectional, 2 cohort, and 9 randomized controlled trials. These studies examined the effects of various diets, including the Mediterranean, low-fat high-carbohydrate, anti-inflammatory, and vegan, on RA. Results indicate adherence to plant-based diets generally reduced disease severity and improved dietary intake, physical activity, body weight, and key clinical markers such as the Disease Activity Score-28, Visual Analog Scale score, Health Assessment Questionnaire Disability Index, erythrocyte sedimentation rate, and C-reactive protein level in patients with in RA.Conclusions Most of the studies suggested the Mediterranean diet may positively affect the severity of RA. However, the included studies show heterogeneity. Therefore, more randomized controlled studies are needed in this area to increase understanding of the effect of diet on RA and facilitate the implementation of strategies to prevent RA.Systematic Review Registration PROSPERO registration no. CRD42023420577.Öğe The EU and the imperial narrative: the response to Russia(Bristol University Press, 2025) Tekin, Ali...Öğe Tracking mechanical properties and UV/Vis/IR shielding effectiveness of ortorhombic FeBW nanostructures(Elsevier Ltd, 2025) Üşenti̇, Hakan; Duru, İzzet ParuğTodays, one of the biggest sources of environmental pollution is the pollution called “electrosmog” caused by electromagnetic fields (EMF) and electromagnetic radiation (EMR). This pollution, which continues to increase day by day, has reached levels that threaten human health and other living things, depending on its severity and duration of exposure. Herewith, the mechanical stability and processability promotes the prevalent usage of the material. The mechanical, electronic, optical, and thermal properties of FeBW have been theoretically investigated. All calculations are performed using density functional theory (DFT) within ab-initio framework. The computed elastic constants confirm the mechanical stability. The Poisson's ratio and Pugh's ratio indicate that FeBW is ductilte. In other words, high machinability index implies superior damage tolerance, making it suitable for industrial applications. The negative signs in Poisson ratio confirm the partial auxetic behavior along the Y-Z and Z-Y axes. Thermodynanic properties are briefly given. Furthermore, The magnetic phase evolves to ferrimagnetic (FiM) behavior when initially parallel spins having same values are assigned to iron atoms. FiM state originates from d orbitals of iron especially dx of eg. The frequency related shielding effectiveness (SE) is examined using dielectric function which is obtained from DFT calculations. Electromagnetic shielding ability of FeBW nanostructure is highlighted for [001], [010], [011], [100], [101], [110], [111] polarization directions resulting in a superior shielding performance at > 23 dB in all cases. Moreover, the best shielding performance (SE) shows up in the ultraviolet spectrum (UV). Thanks to the positive contribution of tungsten (W) to the mechanical properties of FeBW is an exciting material with superior SE performance, which can be used in a variety of applications, including those requiring high physical strength.Öğe Enhancing antimicrobial performance and surface characteristics of glass fiber reinforced composites using chitosan-ZnO-CuO nanohybrids(Elsevier B.V., 2025) Ramazanoğlu, DoğuEnhancing the antimicrobial performance of construction materials such as Glass Fiber Reinforced Concrete (GFRC) is crucial for improving their durability and hygiene, particularly in environments prone to microbial contamination. In this study, hydrothermally synthesized Chitosan-ZnO-CuO nanohybrid composites were incorporated into GFRC to evaluate their antimicrobial efficacy and surface characteristics. Chitosan, a biocompatible and biodegradable polymer, was combined with zinc oxide and copper oxide nanoparticles to form multifunctional hybrids exhibiting synergistic antimicrobial behavior. The nanohybrids were doped into GFRC at concentrations of 1 %, 2 %, and 3 %, and their antimicrobial activity was tested against Escherichia coli, Candida albicans, and Trichophyton tonsurans. At 2 % doping, inhibition zones increased by 66.7 % for E. coli, 36.8 % for C. albicans, and 34.6 % for T. tonsurans compared to 1 % doping. However, efficacy declined at 3 %, suggesting an optimal concentration threshold. Surface roughness analyses revealed that increasing nanohybrid content enhanced surface topography, with Ra values rising from 0.14 µm to 0.95 µm, and Rmax peaking at 17.3 µm at 2 %. This increased surface roughness is believed to promote antimicrobial efficiency by creating a more irregular surface that disrupts microbial adhesion and biofilm formation, thereby synergizing with the nanohybrids’ biocidal action. These findings demonstrate that Chitosan-ZnO-CuO nanohybrids improve the hygienic and surface properties of GFRC, with optimal performance observed at 2 % loading. The study contributes to the development of advanced fiber-reinforced composites with dual mechanical and antimicrobial functionality for hygienically critical applications.Öğe Minimizing omental bleeding risk following sleeve gastrectomy: assessing the double-line sealing technique(Lippincott Williams and Wilkins, 2025) Dalkılıç, Muhammed Said; Gençtürk, Mehmet; Yılmaz, Merih; Erdem, Hasan; Şişik, AbdullahObjective:Laparoscopic sleeve gastrectomy (LSG) has become the most commonly performed bariatric procedure due to its technical simplicity and effectiveness. While stapler line reinforcement has significantly reduced hemorrhagic complications, postoperative bleeding remains a concern, particularly from omentum or unidentified sources. The LigaSure device, known for sealing vessels successfully up to 7 mm in diameter, may face challenges in obese patients due to excessive omental fat. This study introduces a double-sealing technique as a simple solution aimed at reducing postoperative bleeding related to patient-specific factors.Methods:This study conducts a retrospective analysis to evaluate the double-line omental sealing technique in LSG, an intervention aimed at reducing the incidence of postoperative bleeding. We compared outcomes from 222 patients using the double-line sealing (DLS) technique and 297 patients with standard dissection. DLS technique involves creating 2 adjacent rows of seals on the omentum during dissection, aiming to minimize bleeding risks. Patient demographics, including age, sex, body mass index, and comorbidities, were examined, alongside operative time, length of hospital stay, and instances of reoperation. Special attention was given to identifying cases of severe postoperative bleeding, primarily determined by the need for blood transfusion.Results:No demographic differences emerged between the groups. The study group, which utilized DLS, demonstrated a significantly lower incidence of intraperitoneal severe bleeding (0.45%) compared with the control group (3%). Reoperations were significantly reduced, with only 2 cases (0.67%) in the control group and none in the DLS group. It also correlates with reduced length of hospital stay but increased operative time.Conclusions:DLS in LSG shows promise in reducing severe postoperative bleeding. Despite these positive initial findings, further studies with larger sample sizes are recommended to fully ascertain the efficacy and safety of this technique.Öğe Ultrasonic vibration-assisted machining with minimum quantity lubrication for aerospace materials(Springer Nature, 2024) Duman, Erkin; Yapan, Yusuf Furkan; Uysal, Alper; Sofuoğlu, Mehmet AlperThis chapter offers an insightful examination of the advancements in machining aerospace materials, focusing on ultrasonic vibration-assisted (UVA) machining and minimum quantity lubrication (MQL) techniques. It begins with an introduction to the unique challenges associated with machining these advanced materials and how UVA machining and MQL have emerged as innovative solutions to address these challenges. The chapter then systematically explores the effects of these techniques on various aspects of the machining process. It discusses how UVA machining and MQL influence cutting forces, leading to potential reductions in tool wear and energy consumption. The impact on surface quality is also examined, highlighting improvements in terms of both physical appearance and structural integrity. The chapter further discusses the changes in chip morphologies that result from employing UVA machining and MQL, which are crucial for understanding the material removal mechanisms and overall machining efficiency. Finally, it addresses the implications of these techniques on tool wear, emphasizing their potential to extend tool life and maintain machining accuracy. This chapter not only synthesizes current research but also provides practical insights for industry professionals seeking to optimize machining processes for aerospace materials.Öğe Developing a novel hybrid model based on GRU deep neural network and whale optimization algorithm for precise forecasting of river's streamflow(Nature Research, 2025) Gharehbaghi, Amin; Ghasemlounia, Redvan; Ahmadi, Farshad; Mirabbassi, Rasoul; Torabi Haghighi, AliStreamflow contemplates a fundamental criterion to evaluate the impact of human activities and climate changes on the hydrological cycle. In this study, a novel innovative deep neural network (DNN) structure by integrating a double Gated Recurrent Units (GRU) neural network model with a multiplication layer and meta-heuristic whale optimization algorithm (WOA) (i.e., hybrid 2GRU×–WOA model) is developed to improve the prediction accuracy and performance of mean monthly Chehel-Chai River’s streamflow (CCRSFm) in Iran. The Pearson’s correlation coefficient (PCC) and Cosine Amplitude Sensitivity (CAS) as feature (input) selection process determine the only precipitation (Pm) as the most effective input variable among a list of on-site potential climate time series parameters recorded in the study area. Thanks to a well-proportioned layer network structural framework in the suggested hybrid 2GRU×–WOA model, it leads to an appropriate total learnable parameter (TLP) compared to standard individual GRU and Bi-GRU as the benchmark models developed in the comparable meta-parameters. This hybrid model under the optimal meant meta-parameters tuned i.e., coupling a state activation functions (SAF) of tanh-softsign, dropout rate (P-rate) of 0.5, numbers of hidden neurons (NHN) of 70, outperforms with an R2 of 0.79, NSE of 0.76, MAE of 0.21 (m3/s), MBE of -0.11(m3/s), and RMSE of 0.36 (m3/s). Hybridizing the 2GRU× model with WOA algorithm causes to increase in the value of R2 by 6.8% and reduce in the value of RMSE by 20.4%. Comparatively, standard individual GRU and Bi-GRU models result in an R2 of 0.59 and 0.66, NSE of 0.55 and 0.6, MAE of 0.91 and 0.53 (m3/s), MBE of 0.047 and − 0.06 (m3/s), RMSE of 1.29 and 0.83 (m3/s), respectively.Öğe High-speed kinetic energy storage system development and ANSYS analysis of hybrid multi-layered rotor structure(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Yangöz, Cenk; Erhan, KorayFlywheel energy storage systems (FESSs) can reach much higher speeds with the development of technology. This is possible with the development of composite materials. In this context, a study is being carried out to increase the performance of the FESS, which is especially used in leading fields, such as electric power grids, the military, aviation, space and automotive. In this study, a flywheel design and analysis with a hybrid (multi-layered) rotor structure are carried out for situations, where the cost and weight are desired to be kept low despite high-speed requirements. The performance values of solid steel, solid titanium, and solid carbon composite flywheels are compared with flywheels made of different thicknesses of carbon composite on steel and different thicknesses of carbon composite materials on titanium. This study reveals that wrapping carbon composite material around metal in varying thicknesses led to an increase of approximately 10-46% in the maximum rotational velocity of the flywheel. Consequently, despite a 33-42% reduction in system mass and constant system volume, the stored energy was enhanced by 10-23%. It was determined that the energy density of the carbon-layered FESS increased by 100% for the steel core and by 65% for the titanium core.Öğe Relationship between personality traits and professional readiness of nursing students: a descriptive study(Association of Executive Nurses, 2025) Çatak, Tuba; Coşkun, Filiz; Gündüz Hoşgör, DeryaAim: This study aimed to examine the relationship between the personality traits of senior nursing students and their perceptions of professional readiness in the distance education process. Method: This descriptive and correlational study was conducted with 315 senior nursing students, who were reached using the snowball sampling method between March 28 and July 30, 2023. Data were collected online using the Descriptive Information Form, the Nursing Professional Readiness Perception Scale and the Ten-Item Personality Inventory. Descriptive statistical methods (Percentage, Mean, Standard Deviation), Independent samples t-test, One-Way Analysis of Variance, and Pearson Correlation analyses were used for data analysis. Results: It was determined that 56.8% of the students participating in the study reported that the courses completed through distance education negatively affected their professional readiness, and 65.7% were not willing to choose the nursing profession again. It was found that the students' perceptions of professional readiness were at a high level, and when their personality traits were evaluated, the highest average score was obtained from the openness to experience subscale. In addition, statistically significant relationships were found between the Ten-Item Personality Inventory and the sub-dimension scores of the Nursing Professional Readiness Perception Scale (p<0.05). Conclusion: It was determined that senior nursing students' perceptions of professional readiness in the distance education process were at a high level and there was a significant relationship between their perceptions of professional readiness and personality traits.Öğe Emergency action plan for Haditha dam failure scenario, Al-Anbar, Iraq(Future Publishing LLC, 2025) Hameed, Yasameen; Ghasemlounia, Redvan; Mohammed, Thamer Ahmed; Al-Ansi, AbdulwahabDams are essential structures that regulate and manage water for human activities such as irrigation, power generation, flood control, and water supply. However, building and operating dams involve inherent risks that can lead to catastrophic consequences in case of failure, such failures can threaten the environment and populations downstream. Haditha Dam, Al-Anbar Governate, Iraq has been chosen as a case study due to its unique geological conditions (existence of limestone formations prone to karstification) and susceptibility to terrorist attacks. In this research, the risk factor for Haditha Dam is categorized as extremely high risk, with a Total Risk Factor (TRF) of 36. An emergency action plan that includes three possible failure scenarios has been proposed. Based on the flood maps, there is an urgent need for evacuation planning and the designation of safe and unsafe zones in the cities downstream of Haditha Dam to mitigate the consequences of a potential failure of the Dam. This plan aims to address immediate flood inundation, minimize loss of life, and manage the damage that could occur to infrastructure. As part of the emergency response strategy, an evacuation program has been proposed to protect lives and reduce the impact on affected populations.Öğe Ocular effects of synthetic cannabinoids: a case-control study(Springer Nature, 2025) Kunduracı, Merve Sena; Kırık, Furkan; Onur, İsmail Umut; Şahmelikoğlu Onur, Özge; Karşıdağ, Çağatay; Yiğit, Fadime Ulviye; Erkıran, MuratObjective: To evaluate the ocular effects of "Bonzai", a synthetic cannabinoid (SC), in seropositive and seronegative users. Methods: Sixty eyes of 60 consecutive male patients with a history of "Bonzai" use and 30 eyes of 30 age-matched male healthy controls were enrolled in this case-control study. Patients with past "Bonzai" use were grouped as seropositive (n:30) and seronegative (n:30) according to urine toxicology tests. All groups were compared for blood pressures, intraocular pressure, foveal and parafoveal retinal thicknesses, subfoveal and parafoveal choroidal thicknesses, measurements of the peripapillary retinal nerve fibre layer (RNFL), and macular ganglion cell complex (GCC), subfoveal total choroidal, luminal and stromal areas, and choroidal vascularity index (CVI). Results: No differences were noted in blood pressures between the groups (p > 0.05). The mean intraocular pressure was significantly lower in the seropositive group than in the other groups (p < 0.001). Foveal and retinal thicknesses, RNFL, and GCC measurements did not differ between the groups (p > 0.05). Subfoveal and parafoveal choroidal thicknesses and areas were lower in the seropositive group than in the other groups (p < 0.001, for all). CVI increased in both groups with "Bonzai" use compared to the control group (p < 0.001, for all). Conclusions: This study indicates that intraocular pressure may decrease, and choroidal changes may be observed in SC users. Further clinical studies with a larger sample size, especially using purified SC for therapeutic purposes, are needed to confirm the present findings, and further histopathologic studies are required to clarify the changes in the choroid despite SC seronegativity.Öğe The impact of demographic and obstetric factors on perception of traumatic birth and breastfeeding attitudes(Georg Thieme Verlag KG, 2025) Çuvadar, Ayşe; Karamelikli, Elnaz; Çuvadar Baş, YeterObjective: This study aims to examine the effects of sociodemographic and obstetric factors on traumatic birth perception and breastfeeding attitudes in primiparous mothers who have had a vaginal birth in the early postpartum period. Methods: The sample of the research, developed with a cross-sectional and correlational design, consisted of 252 women residing in a province in the Western Black Sea region of T & uuml;rkiye. The data were obtained by employing a Personal Information Form, Traumatic Childbirth Perception Scale, and Breastfeeding Attitudes of The Evaluation Scale. Data analysis was conducted using the statistical programming language R [R version 4.3.3). Results: Women who were not employed, had a planned pregnancy, and did not experience health problems during pregnancy had higher mean breastfeeding attitude scores, and this difference was statistically significant. It was determined that a one-unit increase in gestational week led to an average increase of 1.926 units in breastfeeding attitude score, and a one-unit increase in Traumatic Childbirth Perception Scale score led to an average decrease of 0.110 units in breastfeeding attitude score. The mean traumatic childbirth perception scores of women living in urban areas were found to be lower than those living in villages or towns, and the difference was statistically significant. Conclusion: The research findings indicate that gestational age, perception of traumatic childbirth, and certain sociodemographic factors significantly affect breastfeeding attitudes. Additionally, mothers living in urban areas have a lower perception of traumatic childbirth. Therefore, individualized approaches to childbirth and breastfeeding support are crucial.Öğe Türkçe hasta hakları ve memnuniyeti ölçeği: geçerlik ve güvenirlik çalışması(DOC Design and Informatics Co. Ltd., 2025) Uzun, BelmaAmaç: Bu çalışmada, sağlık kurumlarından hizmet alan hastalarla çalışılarak kişilerin algılarına dayalı geçerli ve gü - venilir bir hasta hakları ve memnuniyeti ölçeği geliştirilmesi amaçlandı. Yöntemler: Ölçek geliştirme kapsamında iki ayrı veri seti oluşturuldu. İlk veri seti, İstanbul’un Kartal ilçesinde özel bir sağlık kurumuna başvuran 320 hastadan; ikinci veri seti ise yine Kartal ilçesinde bulunan farklı bir sağlık kuru - muna başvuran 327 hastadan elde edildi. Ölçeğin geçerlilik çalışmaları kapsamında hastalarla görüşmeler yapıldı ve ölçme aracını oluşturan maddeler hem uzmanların hem de hastaların geri bildirimleri doğrultusunda gözden geçirildi. Yapı geçerliliğini değerlendirme amacıyla açımlayıcı faktör analizi (AFA) ile birlikte doğrulayıcı faktör analizi (DFA) uygulandı. Güvenirlik incelemeleri kapsamında, iç tutarlılığı belirlemek amacıyla Cronbach alfa güvenirlik katsayısı ve madde-toplam korelasyonu hesaplandı. Ayrıca, zaman içindeki tutarlılığı değerlendirmek için ise test-tekrar test korelasyonu uygulandı. Bulgular: Ölçeğin toplam 42 maddeden ve altı faktörden oluşan bir yapıya sahip olduğu belirlendi. Doğrulayıcı faktör analizinin (DFA) uyum indeksi değerleri sırasıyla χ²/sd=3.16, RFI=0.96, NFI=0.96, CFI=0.97, RMSEA=0.0086 ve RMR=0.039 olarak hesaplandı. Bu bulgular doğrultusunda ölçeğin model-veri uyumunun kabul edilebilir düzeyde olduğu değerlendirildi. Güvenirlik analizleri kapsamında, Cronbach alfa iç tutarlılık katsayıları “Hasta Mahremiyeti” boyutu için 0.93, “Sağlık Çalışanı İlgisi ve Nezaketi” boyutu için 0.94,“Hasta Memnuniyeti” boyutu için 0.94, “Servis Hizmetleri” boyutu için 0.90, “Hemşirelerin Tutumu” boyutu için 0.92 ve “Hekimlerin Tutumu” boyutu için 0.91 olarak hesaplandı. Sonuç: Geçerliliği ve güvenirliği yapılan bu ölçeğin, sağlık kurumlarından hizmet alan hastaların hasta hakları ve memnuniyetine ilişkin algılarını belirlemede kullanılabileceği sonucuna ulaşıldı.Öğe Relationships among nutrition knowledge level, healthy eating obsessions, body image, and social media usage in females: a cross-sectional study(BioMed Central Ltd, 2025) Şahin, Elif; Şanlıer, NevinBackground: This study examined the relationships among female’s nutrition knowledge levels, diet practices, healthy eating obsessions, body perceptions, and social media usage. Subjects and methods: The study included 613 voluntarily participating females aged 18–60 years. Data including demographic information, anthropometric measurements, whether they follow a diet or not, and ORTO-R, Body Shape Questionnaire (BSQ-34), Bergen Social Media Addiction Scale (BSMAS), and General and Sport Nutrition Knowledge (GeSNK) Scale scores were collected. Results: The participants’ mean age was 28.47 ± 9.38 years. Mean scores were 17.5 ± 5.1 for the ORTO-R scale, 89.2 ± 40.2 for the BSQ-34, 38.6 ± 12.5 for the GeSNK, and 17.3 ± 6.1 for the BSMAS. Statistically significant differences were found among the participants’ total ORTO-R, BSQ-34, and GeSNK scores according to body mass index (BMI) and education level. Statistically significant relationships were also found among total ORTO-R, BSMAS, BSQ-34, and GeSNK scores. ORTO-R scores were positively correlated with BSMAS (r = 0.475, p < 0.05) and BSQ-34 (r = 0.685, p < 0.05) scores, while they were negatively correlated with GeSNK scores (r = -0.117, p < 0.05). There was a positive correlation between BMI and BSQ-34 scores (r = 0.380, p < 0.001) and between BMI and ORTO-R scores (r = 0.130, p < 0.001), while there was a negative correlation (r = -0.176, p < 0.001) between BMI and GeSNK scores. Conclusions: Social media is a fast, important, and effective tool for the sharing of information. Thus, social media may be effective in strengthening individuals’ nutrition knowledge, nutrition obsessions, body perceptions. Therefore, it would be beneficial to provide training for individuals to use social media consciously and providing nutritional literacy will be effective.Öğe Factors affecting the joy of life in old age: a scale development study(Wiley, 2025) Karagöz, Yalçın; Karaşin, Yusuf; Filiz, Mustafa; Ateş, MehmetThis study aims to introduce a measurement tool into the literature that can reveal the factors affecting the joy of life in older adulthood. Participants included 266 individuals aged 55 and over living in Izmir, Turkey. The process of developing the scale includes the following stages: problem identification, item pool creation, expert opinion, form shaping, pilot application, and finalizing the scale. The exploratory factor analysis revealed that the scale consists of 6 different dimensions, and the variance explained by these dimensions was found to be 65.184%. The acceptable values for the scale's fit indicators are as follows: chi(2)/df0.90, IFI > 0.90, TLI > 0.90, CFI > 0.90, RMSEA < 0.08, and SRMR < 0.08. These values indicate an appropriate fit between the model and the data set. It was determined that the scale of factors affecting the joy of life in older adulthood is valid and reliable. The scale consists of six dimensions and 23 items.Öğe Use of transparent cover and elastic fixation band in patients with peripheral venous catheter: a comparison of microbiological colonisation(MA Healthcare Ltd, 2025) Orhan, Büşra Nur; Göktaş, SonayObjective:The study was carried out to compare the effect of transparent covers and elastic fixation bands used in peripheral venous catheter fixation on microbiological colonisation in patients in intensive care. Method:This experimental randomised controlled study was conducted with patients treated in the Anesthesia and Reanimation Unit (an intensive care unit, ICU) of a training and research hospital in Istanbul between January 2019 and May 2020. Participants were divided into two equal groups: intervention: (catheters fixed with a transparent cover) and control (catheters fixed with an elastic fixation band) by the block randomisation method (CONSORT). After 72 hours, the catheters were removed aseptically and cultures were collected from the catheter tips. The roll plate technique was used and colony growth of >= 15 colony forming units was considered significant. The data of the study were collected using the 'Patient Information Form' and 'Catheter Follow-up and Result Form'. Results:A total of 60 patients were included in the study (30 in each group). It was found that the effect of the microbiological colony-forming microorganism species, and the area of catheter insertion on microbiological colonisation, were not statistically significantly different between the two groups (p>0.05). Conclusion:The findings of this study showed that both fixation methods can be used with effective nursing care in the treatment of patients in ICUs.Öğe Multifunctional SnO2-@ doped glass fiber-reinforced concrete: improved microstructure, mechanical, dielectric, and energy storage characteristics(Elsevier Ltd, 2025) Ramazanoğlu, Doğu; Subaşı, Azime; Musatat, Ahmad Badreddin; Demir, Ahmet; Subaşı, Serkan; Maraşlı, MuhammedThis study explores SnO₂-based hybrid composite (SnO₂-@) doped glass fiber-reinforced concrete (GFRC) for enhanced dielectric, energy storage, and mechanical performance. Microstructural analysis confirmed SnO₂-@ promotes ettringite and calcium silicate hydrate (C-S-H) formation, improving matrix integrity. Aged samples exhibited a 650 % increase in surface roughness (Ra) and over 200 % higher Leeb hardness, demonstrating durability. Dielectric spectroscopy revealed frequency-dependent tunability: 1 % SnO₂-@ achieved a peak dielectric constant (ε' = 130 at 10 kHz), shifting to ε' = 140 at 100 kHz for 2–3 % doping. AC conductivity surged by 60 %, correlating with SnO₂-@-induced interfacial polarization and charge mobility. Energy storage capacity improved significantly, attributed to optimized dipole alignment and reduced leakage currents. Color stability remained robust (ΔE* ≤ 2.8 post-aging), ensuring aesthetic viability. These results position SnO₂-@-doped GFRC as a multifunctional material for smart infrastructure, integrating structural resilience, adaptive dielectric properties, and energy storage potential for next-generation urban applications.Öğe Experimental and optimization study of nanofluid utilized PVT systems with hydrocarbon based PCM: an energetic-exergetic approach(Elsevier Ltd, 2025) Kurtoğlu Sontay, Kübra; Öğüt, Elif; Ustaoğlu, Abid; Özkan, Doğuş; Kurşuncu, BilalCooling of photovoltaic thermal (PVT) systems is crucial for enhancing electrical efficiency by reducing the operating temperature of photovoltaic modules. Elevated temperatures negatively affect the performance of PV cells, leading to a decline in energy conversion efficiency. Photovoltaic thermal (PVT) systems, hybrid technologies that generate electricity and heat, are crucial for efficient energy conversion. This study uniquely explores the performance of a PVT system by integrating phase change materials (PCMs) and nanofluids in PVT systems combined with optimization analysis. By combining these advanced cooling methods, both electrical and thermal efficiencies are significantly optimized, demonstrating the potential for improved energy conversion in PVT systems. Within this scope, three identical systems–water-cooled, nanofluid-cooled, and a combination of nanofluid cooling with PCM- were analyzed regarding electrical, thermal, and exergy efficiencies. Identical panels were placed side by side and tested. Additionally, an optimization analysis has been conducted to enhance the performance of each panel by evaluating the thermal and electrical efficiency values obtained from experimental data based on system parameters and levels. In addition, thermogravimetric analysis and differential scanning calorimetry were conducted to determine the melting point of the Hydrocarbon-Based PCM. Compared with traditional methods, these analyses conducted in conjunction with the experimental study provide a more reliable basis for performance evaluation studies of PVT systems. The results of the experimental study showed that Nanofluid-Integrated PVT with Hydrocarbon-Based PCM achieved 11.7 %, 11.6 % and 10.6 % higher electrical efficiency, overall exergy and electrical exergy respectively, compared to the water-cooling method. Additionally, a 6.6-fold increase in thermal efficiency and a 4.4-fold increase in overall efficiency were observed. Similarly, compared to the nanofluid cooling method, this combination provided 4.9 %, 5.9-fold and 3.47 % improvements in the electrical, thermal and overall exergy efficiencies metrics. The results of the optimization analysis revealed that the combination of PCM and nanofluids ensures greater stability in electrical efficiency values under high-temperature differences. It was also observed that solar irradiance is the most influential parameter affecting efficiency. The obtained results demonstrate that the nanofluid-cooled system integrated with PCM has a significant impact on enhancing the performance of PVT systems. The combined use of nanofluid and PCM considerably improves all efficiency parameters.Öğe The Role of RRA heat treatments on corrosion behaviour of AlSi10Mg produced by additive manufacturing(Elsevier B.V., 2025) Özer, Gökhan; Tütük, İbrahim; Cingöz, Umut Can; Koç, Ebubekir; Karaaslan, AhmetIn this study, AlSi10Mg samples were produced using the Powder Bed Laser Fusion (PBLF) method with standard parameters. Specimens were retrogression and re-aging (RRA) heat-treated at various conditions. The effects of the RRA heat treatments on the properties of PBLF parts were examined by microstructure, electrical conductivity, and electrochemical corrosion tests. Microstructural properties were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray (EDS) analysis. The results showed that after RRA heat treatment, the electrical conductivity of the material decreased slightly, and the corrosion resistance increased.Öğe Analyzing traffic accident trends and correlations in Iraq: an investigative statistical approach(American Institute of Physics, 2025) Hassooni, Dhuha Khalid; Ghasemlounia, Redvan; Hilal, Miami Mohammed; Al-Saffar, Zaid Hazim; Mohammed, Ghufran TahaTraffic accidents are for two reasons, human-related and road-related structural behavior, two of which are in need of investigation. Herewith, this study embarks on an analysis of the dynamics of traffic accidents within Iraq, with a pronounced emphasis on statistical analyses concerning Baghdad, the capital city which is bearing the highest accident rates. An expansive dataset encompassing 10959 traffic incidents recorded over the year 2022 is utilized with this paper examining the distribution and nature of road accidents alongside the resultant degrees of injury. Through the deployment of Histograms and Q-Q Plots, the research confirms the normality of the data, paving the way for subsequent Pearson Correlation and ANOVA tests. These statistical methodologies reveal moderate, yet statistically insignificant, correlations between the nature of accidents and the characteristics of roads, with an F-statistic of 0.247 indicating no substantial effect of accident nature on the type of roads within Baghdad. Notably, the analysis extends to gender-referenced mortality records and root cause analyses that highlight significant seasonal fluctuations in accident occurrences, as well as pivotal gender disparities in road traffic incidents. The city-based accident records, detailed distributions of traffic accidents by nature, degree of injury, and recent accident trends, alongside statistical test visualizations, collectively underpin the analytical discourse. In conclusion, the paper asserts the critical necessity for targeted interventions and policy reforms aimed at mitigating these identified trends and contributing to the broader objective of enhancing road safety in Iraq.
