İstanbul Gelişim Üniversitesi Kurumsal Açık Erişim Arşivi
DSpace@Gelişim, İstanbul Gelişim Üniversitesi 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
In-vitro investigation of bone temperature changes in osteotomies performed with diferent brands of implant burs
(SPRINGER JAPAN KK, SHIROYAMA TRUST TOWER 5F, 4-3-1 TORANOMON, MINATO-KU, TOKYO 105-6005, JAPAN, 2025) Şarkbay, Ömer Faruk; Mihmanlı, Ahmet; Cora, Hakan
The aim of this study was to investigate in-vitro the temperature changes occurring in the bone during drilling
with implant drills manufactured by diferent companies. Bone blocks obtained from fresh bovine ribs were used
in the study. Bone blocks were drilled with drills manufactured by Ankylos, Astra Tech, Nobel Biocare, Bredent
and Straumann implant brands at an ambient temperature of 30±2° C under a constant pressure of 2 kg. Two K-type
thermocouple sensors were placed on the bone blocks at 5th and 10th mm depths and the temperature changes
were measured at a distance of 1 mm from the implant drill. In the study, working models were created under diferent conditions for implant socket preparation. In group 1, the frst time drills were used at 150 rpm without irrigation,
in group 2, the frst time drills were used at 1200 rpm with 40 ml/min irrigation, in group 3, the 30th time drills were
used at 150 rpm without irrigation, and in group 4, the 30th time drills were used at 1200 rpm with 40 ml/min irrigation. All osteotomy procedures were performed with 3.5±0.3 mm diameter burs for a period of 8 s and the temperature values obtained at equal time intervals were recorded. Repeated Measures and Kruskall Wallis-H tests were used
for statistical analysis of the data. No signifcant diference was observed between the implant drills and the temperature changes in the bone during drilling (p<0.05). None of the groups reached critical temperature values (47° C+)
throughout the study. At the 5th and 10th mm depths, the temperature changes in the sensors used were close
to each other. It was also calculated that although the average temperatures were close to each other in the nonirrigated and irrigated systems, the diference values obtained by subtracting the initial temperature were signifcantly
higher in the non-irrigated systems. The results showed that implant drills did not cause signifcant temperature
increases in bone blocks depending on the diference in manufacturers (Ankylos, Astra Tech, Nobel Biocare, Bredent,
Straumann) and the number of uses. It was also concluded that irrigated and non-irrigated systems are safe as long
as they are used under the recommended conditions.
Model roketlerde burun ve gövde farklı malzemelerinin uçuş performansı üzerindeki etkilerinin bazı parametreler açısından değerlendirilmesi
(GAZI UNIV,CENTER CAMPUS TECHNOLOGY FAC B BLOCK EK BINA, 2ND FL, ANKARA 06500, Turkiye, 2025) Al, Abdullah Can; Myderrizi, Indrit
Model roket tasarımında malzeme seçimi uçuş performansı üzerinde güçlü bir etkiye sahiptir. Ayrıca model roket tasarımı için
malzeme seçimine karar verirken, malzemenin maliyetinin yanı sıra performansı da göz önünde bulundurulmalıdır. Havacılık ve
model roketçilikte kullanımı en çok tercih edilen PVC, Karbon fiber, Cam elyafı ve Alüminyum gibi malzemeler, tasarlanan roketin
özellikleri ve uçuş değerleri dikkate alınarak benzetimlerle değerlendirilmiştir. OpenRocket programı ile yapılan benzetimlerde
belirlenen hız, maksimum irtifa, kararlılık, ağırlık oranları, maksimum ivmelenme, uçuş süresi ve iniş hızı ölçütlerine göre
değerlendirmeler yapılmıştır. Bulgular, alüminyumun diğer malzemelere kıyasla fazla ağırlıktan dolayı model roketin
performansını olumsuz etkilediği için elendiğini göstermiştir. En iyi performansı gösteren tüm malzeme kombinasyonları için
roketin burun konisi PVC olarak belirlenmiştir. Gövde bölümlerinde kullanılan PVC esaslı kompozitler, roketlerdeki uçuş verilerini
oldukça değişken ve tutarsız bir şekilde etkilemiştir. Örneğin, denge, maksimum irtifa ve uçuş süresi gibi veriler dikkate alındığında
tahmin edilen değerlerin dışında anormal derecede düşük veya yüksek değerler ortaya çıkmıştır. Gövde bölümleri için elde edilen
değerler birbirine yakın olmasına rağmen, cam elyafın karbon fiberden daha az maliyetli olması onu tasarım için daha uygun hale
getirmiştir.
Optical Solitons and Dynamical Structures for the Zig-zag Optical Lattices in Quantum Physics
(SPRINGER/PLENUM PUBLISHERS, 233 SPRING ST, NEW YORK, NY 10013, 2025) Kaya Sağlam, Fatma Nur; Kopçasız, Bahadır; Tariq, Kalim U.
This paper investigates the widely used Zig-zag optical lattice prototype for cold bosonic atoms. This prototype generally represents nonlinear waves in plasma physics and fluid mechanics. To obtain soliton solutions, two different techniques are used, the Kumar-Malik method and the improved F-expansion approach. These solutions include periodic, kink, combo dark-bright, bright, and dark types of soliton solutions. The conducted soliton solutions show that the approach is capable of identifying a wide range of wave patterns in nonlinear partial differential equation (NLPDE) models and is also compatible, effective, and scientifically efficient. Using the Maple software, 3D, contour, density and 2D structures were created for various values of the relevant parameters in order to do numerical simulations of the outcomes. To the best of our knowledge, no previous study has explored this equation to such an extent. All the solutions obtained are verified using the Maple software application, ensuring their accuracy and correctness.
The associations of mindful and intuitive eating with BMI, depression, anxiety and stress across generations: a cross-sectional study
(TAYLOR & FRANCIS LTD, 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND, 2025) Bayram, Hatice Merve; Gürbüz, Murat
The study aimed to evaluate the differences between generations and relationship between
mindful and intuitive eating with body mass index (BMI), depression, stress, and anxiety. This
cross-sectional study was conducted on 547 adults. Online questionnaire including Intuitive Eating
Scale–2nd edition (IES-2), Mindful Eating Questionnaire (MEQ), and Depression, Anxiety, Stress
Scale was performed. Gen Z scored highest for “unconditional permission to eat”, and lowest for
“interference” (p<0.001). Baby Boomers demonstrated the lowest “conscious nutrition” scores
compared to others (p: 0.002). Weak negative correlations were observed between IES-2 scores
and BMI (r: −0.165, p<0.001), depression (r: −0.194, p<0.001), anxiety (r: −0.191, p<0.001), and
stress (r: −0.100, p: 0.020). MEQ scores were negatively correlated with BMI, depression, anxiety,
and stress (r: −0.159, r: −0.364, r: −0.372, r: −0.360, p<0.001). “Eating for physical rather than
emotional reasons” showed negative correlation with depression, anxiety, and stress scores (r:
−0.259, r: −0.249, r: −0.168, p<0.001).
Exact soliton solutions for the (n+1)-dimensional generalized Kadomtsev-Petviashvili equation via two novel methods
(WORLD SCIENTIFIC PUBL CO PTE LTD, 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE, 2025) Kopçasız, Bahadır; Kaya Sağlam, Fatma Nur; Malik, Sandeep
In this study, we deal with the (n + 1)-dimensional generalized Kadomtsev-Petviashvili equation (gKPE). This equation is an extension of the classical KP equation to higher dimensions, allowing for the study of nonlinear wave propagation in (n + 1) dimensions. Like the original KP equation, the (n+ 1)-dimensional version can support soliton solutions, which are stable waveforms that retain their shape while traveling. The (n+1)- dimensional gKPE has several applications in different physical systems, such as optical fibers, Bose-Einstein condensates, fluid physics, and plasma physics. We use two efficient methods to search for analytical solutions to the equation we consider. One of these methods is the generalized unified method and the improved F-expansion method. Using these techniques, we obtain many soliton solutions of rational, hyperbolic, and trigonometric types. We present 3D, contour, and density plots to observe the behavior of some of the solutions we obtained. The acquired results constitute an essential resource for the study of hydrodynamic waves, plasma fluctuations, and optical solitons and offer useful information for understanding the behavior of the KPE under different physical situations. The methodologies used in this study are robust, influential, and practicable for diverse nonlinear partial differential equations; to our knowledge, these methods of investigation have not been explored before for this equation. The accuracy of each solution has been verified using the Maple software program.
