İstanbul Sağlık ve Teknoloji Üniversitesi Kurumsal Akademik Arşivi
DSpace@İSTÜN, Üniversite mensupları tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Ai-guided optimization of traditional bulgur pilafs: Enhancing sensory and bioactive properties through rsm-pso modeling
(Frontiers Media S. A., 2025) Yıkmış, Seydi; Türk Aslan, Sinem; Türkol, Melikenur; Şimşek, Mehmet Ali; Aljobair, Moneera; Karrar, Emad; Tokatlı, Nazlı; Mohamed Ahmed, Isam A.
This study aimed to enhance the sensory and bioactive properties of pilafs prepared from three geographically indicated bulgur varieties—Siyez, Firik, and Karakilçik—through an AI-guided optimization approach combining Response Surface Methodology (RSM) and Particle Swarm Optimization (PSO). Different bulgur (130–150 g) and water (350–450 mL) ratios were tested to determine optimal formulations. Sensory evaluation revealed that Firik bulgur pilaf achieved the highest overall acceptability (8.49), while Karakilçik bulgur pilaf scored highest in color (7.68) and aroma (8.58), and Siyez bulgur pilaf received the highest taste score (7.50). In terms of bioactive properties, Karakilçik bulgur pilaf showed the highest antioxidant capacity (75.57% DPPH radical scavenging activity), whereas Firik bulgur pilaf had the highest total phenolic (842.39 mg GAE/kg) and flavonoid contents (6.38 mg CE/g). Color analysis indicated that Siyez bulgur pilaf had the lightest color (L=52.18), while Firik pilaf exhibited the most intense red hue (a=8.12) and Karakilçik pilaf the darkest appearance (L=35.42). PSO-based validation confirmed the accuracy of RSM models by reaching global optima within 40 iterations and minimal deviation from experimental values. This is the first study to apply an integrated RSM–PSO modeling approach to traditional bulgur pilafs, enabling the prediction and optimization of their sensory and bioactive characteristics. The results provide a novel framework for enhancing the nutritional value and consumer appeal of heritage cereal-based foods and support the development of standardized, functional bulgur products for the food industry.
Arama yeteneklerinin geliştirilmesi yapay zeka tabanlı literatür taraması
(Kastamonu Üniversitesi, 2025) Yucal, Kubilay; Kasap, Ercan
Bilgi hacminin hızla artması, geleneksel anahtar kelime aramalarını yetersiz kılmakta ve önemli çalışmaların gözden kaçmasına yol açmaktadır. Yapay zekâ destekli sistemler, literatür taramalarının verimliliğini ve kapsamını artırma potansiyeline sahiptir.
Techno-economic and environmental analyses of the use of ammonia-diesel dual fuel in compression ignition engines
(Elsevier, 2025) Karagöz, Yasin; Pusat, Şaban; Tunçer, Erdal; Teksan, A. Emre
In this study, a single-cylinder diesel engine, normally running on diesel fuel, was converted to ammonia-diesel dual fuel. The effects of ammonia fuel at different energy content levels (0 %, 5 %, 10 %, 15 %, and 20 %) were investigated on thermal efficiency, CO, THC, NOx, and smoke emissions. Subsequently, GWP (Global Warming Potential) emission values and tax calculations were performed. Furthermore, economic and exergy analyses were performed using the present value method for converting the engine to ammonia-diesel dual fuel. Finally, the economic analysis was re-conducted by calculating the carbon tax based on the GWP emission value. Based on the results, the lowest GWP emission values were obtained with the addition of ammonia at 10 % energy content.
Effects of blending different ratios of cottonseed oil with diesel fuel in a single-cylinder diesel engine
(AGBIOL, 2025) Tunçer, Erdal
The persistent reliance on internal combustion engines, particularly within the transportation sector, continues to pose significant environmental challenges due to the emission of exhaust gases. This issue has intensified global efforts to identify and develop alternative fuels that can mitigate greenhouse gas emissions associated with fossil fuel consumption. Concurrently, the gradual depletion of petroleum reserves and volatility in fuel prices have introduced economic sustainability concerns. In this experimental study, the impact of blending conventional diesel fuel with 10% and 20% cottonseed oil by volume on engine performance and exhaust emissions was evaluated using a single cylinder direct injection diesel engine. The results demonstrated that the addition of cottonseed oil did not significantly affect engine power output or brake specific fuel consumption. However, a notable decrease in carbon monoxide (CO) emissions was observed, accompanied by an increase in nitrogen oxides (NO) emissions with higher biodiesel ratios. These findings indicate that cottonseed oil–diesel blends up to 20% by volume can be considered a technically viable partial substitute for conventional diesel fuel in compression ignition engines, with tradeoffs in emission characteristics.
Improving oral health in children with disabilities: A preventive home-based care model from Türkiye
(Wiley, 2025) Tunalı, Esra; Ataş, Cafer; Çağ, Yakup; Orhan, Ahmet Lütfullah; Özen, Buğra; Aydınbelge, Mustafa; Tunalı, Mustafa
Background: Children with Special Health Care Needs (CSHCN) face significant challenges in maintaining oral hygiene and accessing dental services due to disabilities. It has been reported that, because of these disadvantages, individuals with special needs experience oral health problems at a higher rate compared to the general population. This study aimed to assess factors influencing oral health in CSHCN within the dental home framework and propose preventive strategies. Methods: A total of 1229 children aged 0-8 years with disability health reports in Istanbul were examined through home visits by mobile dental teams. Caries experience was evaluated using combined indices (dfs + DMFS and dft + DMFT). Data on oral hygiene habits, dietary patterns, parental education level and dental visit history were collected through structured questionnaires. Statistical analyses included Mann-Whitney U, Kruskal-Wallis, chi-square and Spearman's correlation tests (significance set at p < 0.05). Results: A statistically significant positive correlation was found between age and all caries indices (p < 0.01) 0.57. 1% of children reported brushing their teeth, with irregular brushers showing significantly higher caries indices than regular brushers (p < 0.05). Children requiring > 45 min to eat had significantly higher dfs + DMFS (1 surface) (p = 0.036) and dft + DMFT values (p = 0.019). Those consuming snacks > 3 times daily showed significantly higher caries indices across all measures (p < 0.01). Moderate/severe plaque accumulation was detected in 50.5% of participants. Lower parental education levels were significantly associated with higher caries indices (p < 0.01). Conclusions: This study highlights the necessity of an interdisciplinary approach to protect the oral health of CSHCN. The widespread implementation of the dental home model and regular dental check-ups will be a significant step in addressing oral health needs.
