Atılım Academic Archive (Atılım University)
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Synthesis and Electropolymerization of a Selenophene Based Chemiluminescent Monomer and Its Use in Blood Detection
No full textCakal, Deniz/0000-0003-1656-2430A new selenophene based trimeric chemiluminescent compound, namely 5,7-di(selenophen-2-yl)-2,3-dihydrothieno[3,4-d]pyridazine-1,4-dione (S2T-Lum), was synthesized in two steps via electron donor-acceptor-donor approach. Its chemiluminescent reaction with hydrogen peroxide was investigated in an alkaline solution in the presence of various catalysts such as different metal ions, hemin and blood samples and the results were compared with its thiophene analogue (T2T-Lum) and luminol. It was found that S2T-Lum was very sensitive to copper(II) and iron(III) ions, and blood samples. Also, it can be easily concluded that S2T-Lum as a new member of luminol type compounds is a potential candidate for the detection of blood findings in forensic science. Furthermore, S2T-Lum has an irreversible oxidation peak at 1.28 V vs Ag/AgCl, which is responsible from its electropolymerization. S2T-Lum was successfully polymerized electrochemically via potentiodynamic electrolysis without cleavage of its chemiluminescent active appendage. To the best of our knowledge, its corresponding polymer PS2T-Lum film is the first member of selenophene based luminol type electroactive polymers.Scientific and Technological Research Council of Turkey (TUBITAK) [118Z067]We would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK, Grand number: 118Z067) for its financial support
Optimal Design and Technoeconomic Analysis of On-Site Hydrogen Refueling Station Powered by Wind and Solar Photovoltaic Hybrid Energy Systems
No full textDevrim, YilserIn this study, a grid-connected on-site hydrogen filling station (HRS) integrated with renewable energy systems is designed and examined for different daily hydrogen refueling capacities. The installation location of the HRS is selected in Izmir (Turkey) and daily solar radiation and wind speed data are used in the calculations. The HRS station was integrated with a hybrid energy system using photovoltaic panels (PV), wind turbine (WT) and PV/ WT and five different daily refueling scenarios were investigated. A techno-economic analysis is conducted for the designed HRS system, considering the initial investment capital, installation and operating costs. The levelized cost of hydrogen (LCOH) is evaluated according to different refueling capacity scenarios, periods of operation and renewable energy installation capacities. The lowest LCOH is obtained as 4.5 /kg H2 in the PVintegrated HRS system for a 20-year investment scenario. The results prove the suitability of the HRS system for integrating renewable energy in the identified region. It is recommended to integrate analytical models for the system components to increase the reliability of the design and optimization process in future planned studies.Science Citation Index Expande
Ultrasonic Vibration-Assisted Machining of Invar 36 Alloy Manufactured by Wire Arc Additive Manufacturing
No full textNamlu, Ramazan Hakki/0000-0002-7375-8934Invar 36, known for its low coefficient of thermal expansion, is widely used in applications like composite moulds, electronics, and optics. Although Wire Arc Additive Manufacturing (WAAM) offers high deposition rates and cost-effectiveness for Invar 36, it creates rough surface textures requiring machining as post-processing. In order to overcome Invar 36's machinability challenges, Ultrasonic Vibration-Assisted Machining (UVAM) was applied for the first time on WAAM-fabricated Invar 36. The results showed that UVAM outperformed conventional machining in terms of cutting force, surface roughness and topography, subsurface microhardness and tool wear with improvements observed in both building and deposition directions. (c) 2025 CIRP. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies
Nurses' Hand Hygiene Beliefs and Practices: A Cross-Sectional Study
No full textAim: Healthcare-associated infections (HAIs) are related to significant morbidity, mortality, and increased hospital costs. Hand hygiene has been demonstrated to be an effective measure in preventing HAIs. This study aimed to evaluate nurses’ beliefs and practices concerning hand hygiene. Material and Methods: This cross-sectional study was conducted in two university hospitals in North Cyprus between November and December 2020, involving a total of 80 nurses. Data were collected using the Turkish revised version of the Hand Hygiene Belief Scale and the Hand Hygiene Practices Inventory. Descriptive statistics, Mann-Whitney U test and Kruskall Wallis test were used to compare the groups. Results: The findings revealed that the overall hand hygiene belief score among nurses was 3.99±1.74, while the overall hand hygiene practice score was 4.85±0.84. Comparisons between hand hygiene belief and practice scores and nurses' demographic data indicated no statistically significant difference. Conclusions: Nurses had positive hand hygiene beliefs and a high level of practice score of hand hygiene. Notably, the practice scores exceeded the belief scores. Implication for nursing practice/management or policy: Educational strategies to improve the hand hygiene beliefs of the nurses are recommended. Future studies could expand the participation rate, extending the research across multiple healthcare institutions
Açık Açılı Glokomlu Hastalarda Gonyoskopi Yardımlı Translüminal Trabekülotomi ile Eğik İğne Ab İnterno Gonyektomi Karşılaştırması
No full textAmaç: Açık açılı glokomlu (AAG) hastalarda gonyoskopi yardımlı translüminal trabekülotomi (GATT) ile eğik iğne ab interno gonyektominin (BANG) etkinlik ve güvenliğini karşılaştırmak. Gereç ve Yöntem: Bu retrospektif karşılaştırmalı çalışma, GATT (34 göz) veya BANG (31 göz) uygulanan AAG tanılı 65 gözü içermektedir. Göz içi basınç (GİB), başlangıçta ve postoperatif takip vizitlerinde Goldmann applanasyon tonometresi ile ölçüldü. Cerrahi başarı, kısmi (GİB ≤21 mmHg ve ≥%20 azalma) ve tam (aynı kriterler ilaçsız) olarak kategorize edildi. Komplikasyonlar ve ek cerrahi gereksinimi not edildi. Bulgular: Ameliyat öncesi ortalama GİB, GATT grubunda 32,9±6,1 mmHg iken, BANG grubunda 31,8±5,4 mmHg idi. Son kontrolde, GATT grubunda ortalama GİB 15,8±4,5 mmHg’ye düşerken (%51,9 azalma), BANG grubunda 17,9±5,7 mmHg’ye (%43,7 azalma) düştü. Tam cerrahi başarı oranı GATT prosedürü için %88,2, BANG prosedürü için %61,3’tü. Erken cerrahi başarısızlıklar BANG grubunda daha sık görülürken, GATT grubunda erken başarısızlıklar daha nadir olsa da, geç dönemde cerrahi başarısızlıklar BANG grubuna göre daha sık izlendi. Her iki prosedürde de minimal komplikasyonlar görülmüş olup; en yaygın komplikasyon ise geçici hifemaydı. Sonuç: Bu çalışmada, GATT cerrahisinin, BANG cerrahisine kıyasla daha büyük ve daha sürdürülebilir GİB azalması sağladığı ve daha yüksek cerrahi başarı oranlarına sahip olduğu dikkate alındığında, AAG’nin yönetiminde GATT’ın daha güvenilir bir seçenek olduğu söylenebilir
Outcomes of Gonioscopy-Assisted Transluminal Trabeculotomy in Children with Early-Onset Glaucoma Secondary To Sturge-Weber Syndrome
No full textUcgul, Ahmet Yucel/0000-0001-9945-793X;Purpose: To evaluate the effectiveness and safety of gonioscopy-assisted transluminal trabeculotomy (GATT) in managing early-onset glaucoma secondary to Sturge-Weber syndrome (SWS). Design: A retrospective interventional case series. Participants: Medical records of 16 patients (22 eyes) diagnosed with early-onset glaucoma secondary to SWS who underwent GATT surgery were reviewed. Methods: All patients underwent GATT surgery using a 5-0 or 6-0 prolene suture under general anesthesia. Main Outcome Measures: The primary outcomes were intraocular pressure (IOP) reduction, complete surgical success (IOP <= 18 mmHg without medications), qualified surgical success (IOP <= 18 mmHg with medications), and postoperative complications. Results: The mean IOP decreased significantly from 25.4 +/- 4.8 mmHg at baseline to 15.7 +/- 4.2 mmHg at the final follow-up (P < 0.001), representing a 38.19% reduction. The mean age at the time of GATT surgery was 33.6 +/- 33.9 months. The mean follow-up duration was 16.3 +/- 6.4 months. Complete surgical success was achieved in 45.4% of eyes (10 out of 22), while qualified success was reached in 81.8% of eyes (18 out of 22). Despite the overall success, 18.1% of eyes (4 eyes) required additional surgical interventions during the follow-up period. These included Ahmed glaucoma valve implantation in 1 eye, trabeculectomy in 2 eyes, and transscleral diode laser cyclophotocoagulation in 1 eye. Transient hyphema was the only reported complication, resolving spontaneously within 1 week without further intervention. Conclusions: Gonioscopy-assisted transluminal trabeculotomy appears to be a promising surgical option for managing early-onset glaucoma in patients with SWS, offering significant IOP reduction and a favorable safety profile within the limitations of our study. However, further studies with longer follow-up periods and comparative groups are necessary to confirm these findings
The Effect of Perceived Stress on Hot Flashes in Women During Menopause
No full textBu çalışma, menopozal dönemdeki kadınlarda algılanan stresin sıcak basması üzerindeki etkisini incelemek amacıyla yapılmıştır. Tanımlayıcı ve ilişki arayıcı nitelikte olan bu çalışmaya, bir devlet hastanesinin kadın doğum polikliniğine başvuran 40-60 yaş aralığında, araştırmaya katılmaya gönüllü ve katılım kriterlerine uyan sıcak basması yaşayan menopoz dönemindeki 138 kadın dahil edilmiştir. Veriler Etik Kurul onayının alınmasının ardından 20.01.2024 ile 07.10.2024 tarihleri arasında, Tanıtıcı Bilgi Formu, Menopoza Özgü Sıcak Basması Ölçeği (MÖSBÖ) ve Algılanan Stres Ölçeği (ASÖ) kullanılarak toplanmıştır. Verilerin analizinde tanımlayıcı istatistikler, bağımsız örneklem t testi, One-Way Anova, çoklu doğrusal regresyon analizi, pearson korelasyon testleri ve algılanan stresin sıcak basması üzerindeki etkisini değerlendirmek için Yapısal Eşitlik Modellemesi kullanılmıştır. Araştırmada ASÖ puan ortalaması 30,68±9,47 MÖSBÖ puan ortalaması 56,08±20,76 olarak bulunmuştur. Çalışmaya katılım gösteren kadınların yaş ortalaması 52,61±4,31, menopoza girme yaş ortalaması ise 47,90±3,38 olarak bulunmuştur. Kadınların %94,2'sinin doğal yolla menopoza girdiği belirlenmiştir. Gerçekleştirilen ileri analizlerde algılanan stres puanları üzerinde kahve tüketiminin (β = 1,912, SE = 0,509, t = 3,754, p <0,001), menopoz şikayetlerine yönelik uygulama yapmama durumunun (β = 6,614, SE = 2,144, t = 3,085, p = 0,003) ve menopoz dönemi ile ilgili bilgi almama durumunun (β = 3,519, SE = 1,604, t = 2,194, p = 0,030); menopoza özgü sıcak basması puanları üzerinde menopoz şikayetlerine yönelik herhangi bir uygulama yapma durumunun (B = 17,075, SE = 6,063, z = 2,816, p = 0,005) anlamlı bir artırıcı etkisinin olduğu tespit edilmiştir. Algılanan stres ve sıcak basması faktörleri ile kurulan yapısal eşitlik modeli analizinde ASÖ puanları ile MÖSBÖ ölçüm puanları arasında aynı yönlü bir ilişki bulunduğu belirlenmiştir. Buna göre kadınlarda algılanan stres düzeylerindeki artışın, sıcak basmasını da arttırdığı belirlenmiştir. Araştırmadan elde edilen sonuçlar doğrultusunda, kadınlar için menopoz sürecinde karşılaşabilecekleri semptomlar ve başa çıkma yöntemleri hakkında eğitimler düzenlenmesi önerilmektedir.This study was conducted to examine the effect of perceived stress on hot flashes in menopausal women. A total of 138 women aged 40-60, experiencing hot flashes during menopause, who voluntarily agreed to participate and met the inclusion criteria, were included in this descriptive and relational study. The participants were recruited from the gynecology outpatient clinic of a state hospital. Data were collected between January 20, 2024, and October 7, 2024, following ethical committee approval, using a Demographic Information Form, the Menopause-Specific Hot Flash Scale (MSHFS), and the Perceived Stress Scale (PSS). Data analysis included descriptive statistics, independent sample t-tests, One-Way ANOVA, multiple linear regression analysis, Pearson correlation tests, and Structural Equation Modeling (SEM) to evaluate the impact of perceived stress on hot flashes. The mean PSS score was found to be 30.68±9.47, and the mean MSHFS score was 56.08±20.76. The average age of the participants was 52.61±4.31, and the mean age of menopause onset was 47.90±3.38. It was determined that 94.2% of the women had entered menopause naturally. Advanced analyses revealed that coffee consumption (β = 1.912, SE = 0.509, t = 3.754, p < 0.001), not implementing any interventions for menopausal complaints (β = 6.614, SE = 2.144, t = 3.085, p = 0.003), and lack of information about menopause (β = 3.519, SE = 1.604, t = 2.194, p = 0.030) had significant increasing effects on perceived stress scores. Similarly, not implementing any interventions for menopausal complaints (B = 17.075, SE = 6.063, z = 2.816, p = 0.005) significantly increased menopause-specific hot flash scores. The structural equation model analysis revealed a positive relationship between PSS and MSHFS scores, indicating that an increase in perceived stress levels leads to an increase in hot flashes. Based on the results of this study, it is recommended to organize educational programs for women on the symptoms they may encounter during menopause and coping strategies
Düzensiz Göç Hareketlerinin Tespitinde İhas Kullanımı: İhas Üslerinin Tespiti ve Uçuş Devriyelerin Belirlenmesi
No full textUluslararası göç, küreselleşen dünyada sosyal, politik ve ekonomik açıdan toplumları derinden etkileyen önemli bir olgu haline gelmiştir. Özellikle son dönemde artan göç hareketleri, hedef ülkelerin güvenlik politikalarını sıkılaştırmasına neden olmuştur. Düzensiz göçün engellenmesi için güvenlik sistemlerinin ve güvenlik birimlerinin etkili bir şekilde koordine çalışması gerekmektedir. Bu bağlamda, İnsansız Hava Aracı Sistemleri (İHAS) geniş alanları hızlı tarayabilme, yüksek çözünürlüklü görüntüler sağlama ve uzun süre havada kalabilme gibi avantajlarıyla önemli bir rol oynamaktadır. Ülkemizin İHAS teknolojisinde dünya çapında lider olması, düzensiz göçün önlenmesinde büyük bir katkı sağlamaktadır. Çalışmanın ana odak noktası, düzensiz göç güzergâhlarını izlemek amacıyla İHAS'ların kullanımını ele almaktadır. Bu kapsamda, İHAS'ların konumlandırılması ve uçuş rotalarının matematiksel modeller kullanılarak belirlenmesi incelenmiştir. İHAS'lar genellikle üç ila altı İHA'dan oluşur ve belirlenen hava üslerine konuşlandırılır. Uygun üs ve güzergâh seçimi, sistemin etkinliği açısından kritik öneme sahiptir. Yanlış seçimler, keşif faaliyetlerinin verimsiz olmasına yol açabilir. Çalışma kapsamında oluşturulan jenerik senaryoda, İHAS üs bölgesinin seçimi ve İHA uçuşlarının güzergâh rotalaması karışık tam sayılı programlama ile modellenmiş ve GAMS optimizasyon yazılımı ile sonuçlar elde edilmiştir
Understanding the Intention To Use Artificial Intelligence Chatbots in Education: the Role of Individual Innovativeness and AI Trust Among University Students
No full textGokcearslan, Sahin/0000-0003-3532-4251AI chatbots, which use artificial intelligence and are growing in popularity offer interactive learning environments. In this current study, we used the Technology Acceptance Model (TAM) for the acceptance of AI chatbots in the educational environment. The expanded model included the variables of AI chatbot trust and individual innovativeness. A total of 306 university students participated in the research. According to the Partial Least Squares Structural Equation Modeling (PLS-SEM) results, the model explained 61% of the variance in intention to use AI chatbots for educational purposes. This study shows that AI trust and individual innovativeness offer deeper insights into the research model. Based on these findings, practical recommendations include providing supportive activities to improve ease of use and usefulness, encouraging innovation among less innovative students, and enhancing chatbot design with more humanistic and pedagogical features to build trust and engagement.Emerging Sources Citation Inde
Development and Validation of an ICF-Based New Scale-Atilim Kinesiophobia Scale: A Methodological Study
No full textCan Karahan, Zehra/0000-0002-6919-2720;It is important to assess kinesiophobia, which increases the risk of disability by limiting physical activity. In this cross-sectional study, we aimed to develop a scale that assesses kinesiophobia with the multidimensional structure of International Classification of Functioning, Disability and Health (ICF). Atilim Kinesiophobia Scale (AKS) was developed in Turkish by an expert panel using questionnaires replied by 367 subjects. Finally, 38 questions based on the sub-domains of the ICF described by World Health Organization. In the scope of this cross-sectional study content validity and reliability were assessed; construct validity (both convergent and divergent validity) was checked against Tampa Kinesiophobia Scale-17 and Visual Analog Scale. AKS demonstrated good internal consistency and convergent validity, with significant correlations observed with the Tampa Scale for Kinesiophobia-17 (r = 0.478, P < .001). Divergent validity was supported by insignificant correlations with the Visual Analog Scale (r = 0.019, P = .855). The Cronbach alpha coefficient of 0.862 indicates a high level of internal consistency for the AKS. Based on these findings, the final version of AKS was refined to include 4 factors and 14 items, demonstrating good internal validity. We developed and validated the AKS to assess kinesophobia in patients with acute and/or chronic musculoskeletal pain. This new ICF-based scale can be used to assess kinesiophobia; however further studies are required to prove its validity and reliability in other languages