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Morphometric analysis and tortuosity typing of the large intestine segments on computed tomography colonography with artificial intelligence.
No full textBackground: Morphological properties such as length and tortuosity of the large intestine segments play important roles, especially in interventional procedures like colonoscopy. Objective: Using computed tomography (CT) colonoscopy images, this study aimed to examine the morphological features of the colon's anatomical sections and investigate the relationship of these sections with each other or with age groups. The shapes of the transverse colon were analyzed using artificial intelligence. Methods: The study was conducted as a two- and three-dimensional examination of CT colonography images of people between 40 and 80 years old, which were obtained retrospectively. An artificial intelligence algorithm (YOLOv8) was used for shape detection on 3D colon images. Results: 160 people with a mean age of 89 men and 71 women included in the study were 57.79 +/- 8.55 and 56.55 +/- 6.60, respectively, and there was no statistically significant difference (p= 0.24). The total colon length was 166.11 +/- 25.07 cm for men and 158.73 +/- 21.92 cm for women, with no significant difference between groups (p=0.12). As a result of the training of the model Precision, Recall, and mAP were found to be 0.8578, 0.7940, and 0.9142, respectively. Conclusions: The study highlights the importance of understanding the type and morphology of the large intestine for accurate interpretation of CT colonography results and effective clinical management of patients with suspected large intestine abnormalities. Furthermore, this study showed that 88.57% of the images in the test data set were detected correctly and that AI can play an important role in colon typing
Various traveling wave solutions for (2+1)-dimensional extended Kadomtsev-Petviashvili equation using a newly created methodology
No full textThe Kadomtsev-Petviashvili (KP) equation is a crucial model in various physical systems, including hydrodynamic wave disturbances, plasma physics, and nonlinear optics. Our study focuses on the analytical solutions of the (2+1)-dimensional extended KP equation, as these solutions can offer mathematical tools for understanding wave behavior and have practical applications. We found that incorporating two additional terms can restore the integrability of the equation, leading to the generation of dark and bright soliton and traveling wave solutions. In this work, we employ the Kumar-Malik method to find analytical solutions to the (2+1)- dimensional extended KP equation. The Kumar-Malik method is an effective approach for solving nonlinear partial differential equations (NLPDEs) based on a first-order differential equation. By applying this method, we have derived various solutions to the (2+1)-dimensional extended KP equation, including Jacobi elliptic, hyperbolic, trigonometric, and exponential function solutions. These solutions are then presented graphically to illustrate the wave behavior under different parameters. Our results contribute to a deeper understanding of the KP equation's behavior under different physical conditions. Specifically, we have examined the effects of parameters on the widths, velocities, and other essential properties of the waves. This information is invaluable for studying hydrodynamic waves, plasma fluctuations, and optical solitons. In conclusion, this work underscores the importance of obtaining analytical solutions to the (2+1)-dimensional extended KP equation and presenting these solutions graphically. These solutions provide a valuable resource for understanding the complex behavior of physical systems and can inspire future research
The Effect of Phenylalanine, Proline Amino Acid and Bunch Tip Reduction Applications on Berry Quality Parameters of 'Red Globe' Table Grape Variety (Vitis vinifera L.)
No full textFoliar spray applications may be a valuable tool for producing high quality grapes. However, it is important to use the proper foliar substance and apply it at the proper time and concentration. Recently, it has been observed that there are a limited number of studies on phenylalanine and proline applications in improving grape quality. In current research, three different doses (0, 500 and 1000 ppm) of phenylalanine (Phe) and proline (Pro) were used alone or in combination with bunch tip reduction (Btr) application in order to determine their effects on grape quality attributes. As a consequence of this study, particularly Phe-1000 ppm + Btr was found to be the most favorable application for improving phytochemical properties of 'Red Globe' table grape variety
Standardizing the Stone Free Definition After Retrograde Intrarenal Surgery
No full text[Abstract Not Available
Nanoclay packaging materials as biodegradable
No full textNanoclays are nanomaterials consisting of layered silicate clay minerals and have various applications in food packaging. They can improve the mechanical, thermal, and barrier properties of both petroleum-based and bio-based polymers, as well as provide other functions such as antimicrobial activity, colorimetric indication, biodegradability enhancement, additive partitioning, and control and release of active ingredients. This chapter reviews the types, properties, and manufacturing methods of nanoclay-based polymer nanocomposites for food packaging. In addition, the latest achievements and challenges related to the use of nanoclays as food packaging materials are discussed, and an overview of the current state of knowledge and future perspectives for the development of nanoclay technology in the food industry is provided. © 2024, IGI Global. All rights reserved
YouTube videolarının dental implant içeriği hastalara faydalı mı?
No full textAmaç: Bu çalışmanın amacı, hastalar için bilgi kaynağı olan dental implant konulu YouTube videoların içeriğinin, yararlılı- ğının, güvenilirliğinin ve kalitesinin analiz edilmesidir. Gereç ve Yöntem: Dental implant için 3 farklı anahtar kelime olan “diş implantı”, “çene implantı” ve “implant tedavisi” ile 3 grup oluşturuldu. Her grup için ilk 60 video izlendi. Videola- rın toplam izlenme sayısı, video süresi, “beğenme”, yüklenme sonrası geçen gün, yükleme kaynağı ve izlenme oranı kayde- dildi. Yüklenme kaynağı, hedef kitle ve bilgiyi verene göre vi- deolar sınıflandırıldı. Videoların içeriklerine göre oluşturulan yararlılık skoru, video içeriği zayıf (0-2 puan), orta (3-5 puan) ve iyi (6-8 puan) olarak kategorize edildi. Güvenilirlik açısın- dan DISCERN değeri 0 ile 5 puan arasında, kalite açısından GQS değeri 1 ile 5 arasında puanlandı. Bulgular: Diş implantı grubunda 44, çene implantında 33 ve implant tedavisinde 32 olmak üzere toplamda 109 video de- ğerlendirildi. Tüm videolar için yararlılık skoru ortalama değeri 3,34 olarak, DISCERN skoru ortalama değeri 1,93 olarak, GQS skoru ortalama değeri ise 2,44 olarak kaydedildi. Yararlılık skoru kategorilerine göre video sürelerinin ortalama değerleri arasında istatistiksel olarak anlamlı bir farklılığın olduğu göz- lendi (p=0,033). Sonuç: Bu çalışmanın sonuçları dental implant ile ilgili vide- oların %50,4'ünün düşük kalite puanına sahip olduğunu gös- termiştir. YouTube'un bilgi kaynağı olarak kullanılmasının uy- gun olmadığı sonucuna varılabilir
Effect of Prestressing Level on a Lead Damper with Straight Shaft: An Experimental Investigation
No full text18th World Conference on Seismic Isolation, Energy Dissipation, and Active Vibration Control of Structures, WCSI 2023 -- 6 November 2023 through 10 November 2023 -- Antalya -- 319809The prestressed lead damper is an energy-dissipative device with a high damping capacity and is used for seismic response control in the earthquake-resistant design of structures. The device works as a friction damper and utilizes the friction losses between lead and a moving shaft while prestressing on the lead controls the behavior. This study experimentally investigates the effect of prestressing level on the characteristics of a lead damper. After producing the lead damper with a straight shaft, different prestressing levels were applied to the lead, i.e., 0.0%, 0.5%, 1.0%, 1.5%, 2.0%, 3.0% and 4.0%. The dampers were experimentally tested by applying a three-step displacement protocol to the shaft: five cycles of 5.0 mm target displacement with a rate of 0.5 mm/s, five cycles of 10.0 mm target displacement with a rate of 1.0 mm/s, and ten cycles of 20.0 mm target displacement with a rate of 2.0 mm/s. The cyclic tests showed that the lead damper’s characteristics, e.g., damper force, initial stiffness, hysteretic behavior, and damping properties, were considerably affected by the amount of prestressing on lead. Increasing the lead prestressing levels resulted in more stable hysteretic curves. In addition, the damper force and, consequently, the damping properties were significantly improved. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK, (121M719
Kamusal Alanların Mekânsal Kalite Parametreleri Temelinde Görsel Peyzaj Değerinin Belirlenmesi: İstanbul/ Maltepe Örneği
Get PDFKamusal alanlar; estetik, rekreasyon, miras değerleri ile kentsel kimlik ve kalitenin temel bileşenidirler. Kamusal alanlara yönelik kimlik ve kalitenin değerlendirilmesinde de görsel algıya dayalı mekansal tercihler belirleyici olmaktadır. Bu kapsamda çalışmada “Kamusal alanlarda görsel kimlik ve mekansal kalite ilişkili olup, görsel algıya dayalı olarak memnuniyet düzeyinin analiz edilmesi mekansal kalitenin belirlenmesinde etkilidir" hipotezi çerçevesinde İstanbul/Maltepe İlçesi özelinde kamusal alanların geçmiş ve günümüz görüntülerine dayalı olarak görsel peyzaj kalitesinin belirlenmesi amaçlanmıştır. Bu amaçla; “Kamusal alanlarda mekansal kaliteye dayalı parametreler ile görsel peyzaj nasıl ilişkilendirilebilir?” ve “Kamusal alanlarda mekansal kalite unsurlarının tanımlanmasına dayalı olarak görsel kalite nasıl değerlendirilebilir?” sorularına yanıt aranmıştır. Çalışma, mekansal kalite parametrelerine dayalı olarak geliştirilen görsel kalite değerlendirmesi ana yöntemi kurgusu çerçevesinde Likert Ölçeği kullanılarak bir fotoğraf anketi yaklaşımı esasına dayandırılmıştır. Bu çerçevede İstanbul/Maltepe İlçesi özelinde kamusal alanların geçmiş ve günümüz görüntülerine dayalı olarak uzman grubu tarafından görsel açıdan düşük-orta-yüksek nitelikli peyzajlar belirlenmiş, mekânsal kalite parametreleri ile görsel algıya dayalı tercihler arasındaki ilişkiler saptanmıştı
The effect of papaverine on tendon healing and adhesion in rats following Achilles tendon repair
No full textObjectives: The study aimed to examine the histopathological and biomechanical effects of papaverine administered intraperitoneally and locally on Achilles tendon healing in a rat model. Materials and methods: Forty-eight adult male SpragueDawley rats (range, 300 to 400 g) were used in this study conducted between October and November 2022. The rats were divided into three groups, with each group further subdivided into two for sacrifice on either the 15(th) (early period) or 30(th) (late period) day after surgery. The first (control) group received no treatment following Achilles tendon repair, while papaverine was intraperitoneally administered every other day for 10 days in the second group and locally in the third group after surgery. On the 15(th) and 30(th) days, the rats were sacrificed, and their Achilles tendons were subjected to biomechanical testing and histopathological evaluation. Results: Histopathologically, there were no significant differences among the groups on the 15 th day. However, on the 30 th day, the locally applied papaverine group exhibited superior histopathological outcomes compared to the control group (p<0.05). Concerning the highest tensile strength values before rupture, the biomechanical assessment showed that the group receiving local papaverine treatment in the early period and both the group with systemic papaverine treatment and the one with local papaverine treatment in the late period displayed a statistically significant advantage compared to the control group (p<0.05). Conclusion: Locally administered papaverine has positive biomechanical effects in the early period and exhibits a positive correlation both histopathologically and biomechanically in the late period. Novel therapeutic options may be provided for patients through these findings
Unleashing power of financial technologies on mineral productivity in G-20 countries
No full textThis study aims to investigate the effects of financial technologies (FinTech) on mineral productivity, used for the first time in an empirical analysis, for G-20 countries. In the process, the impacts of financial technology, population, economic growth, trade openness, human capital, and total factor productivity on mineral productivity are examined using panel regression and panel VAR procedure for the period from 2002 to 2019. Empirical research yielded evidence indicating that increasing factor productivity and finance technology drive an increase in mineral productivity. Nonetheless, there is an inverse relationship between trade openness and mineral productivity. Moreover, there is no statistically significant relationship between economic growth, population growth, human capital accumulation, and mineral productivity. Furthermore, we also utilized with method of moments quantile regression technique to observe the effects of explanatory variables on different quantiles of mineral productivity. The findings demonstrate that although economic growth has a negative effect on mineral productivity across all quantiles, a positive increase in factor productivity has an influence on mineral productivity across all quantiles. However, financial technology and human capital accumulation only benefit mineral productivity at huge quantiles. Additionally, the outcomes of the robustness check techniques used show that financial technologies and mineral productivity have a bidirectional causal link and that, in the former instance of positive shocks in the latter, there are positive and substantial reactions