Sultanahmet meydanının tarihi

Taha Toros Arşivi, Dosya No: 6-Sultanahmetİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Tarihi tetkikler:donanmada topçuluk

Taha Toros Arşivi, Dosya No: 60-DenizyollarıUnutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010

Unsupervised Odometry and Depth Learning for Endoscopic Capsule Robots

In the last decade, many medical companies and research groups have tried to convert passive capsule endoscopes as an emerging and minimally invasive diagnostic technology into actively steerable endoscopic capsule robots which will provide more intuitive disease detection, targeted drug delivery and biopsy-like operations in the gastrointestinal(GI) tract. In this study, we introduce a fully unsupervised, real-time odometry and depth learner for monocular endoscopic capsule robots. We establish the supervision by warping view sequences and assigning the re-projection minimization to the loss function, which we adopt in multi-view pose estimation and single-view depth estimation network. Detailed quantitative and qualitative analyses of the proposed framework performed on non-rigidly deformable ex-vivo porcine stomach datasets proves the effectiveness of the method in terms of motion estimation and depth recovery.Comment: submitted to IROS 201

An Application Based on Artificial Neural Network for Determining Viewpoint Coordinates on a Screen

This study used two different Artificial Neural Networks (ANN) to determine the point on a computer screen that the user is looking at. First, an ANN, called ANN1 was developed to identify the eye region of a laptop user from a webcam image. The computer screen was then divided into 57 × 32 blocks of 24 × 24 pixels. One hundred of these were randomly selected, and 20 images were taken by the integrated webcam while the user was looking at each point. The eye region was found on each image by ANN1. This eye region data was used to train another ANN, called ANN2. Twenty blocks were selected, and 20 different images were used as the test set. The coordinates of the block at which the user was looking were determined by ANN2. The deviations between the actual location coordinates and the location coordinates estimated by ANN2 were small. We conclude that our ANN2 was successfully trained to find the viewpoint of the user

Frequency of latent tuberculosis in patients receiving Anti-TNF-Alpha therapy

Setting-Objective: In this study, it was aimed to reveal the incidence of tuberculosis development in patients receiving tumor necrosis factor-alpha (TNF-α) blocker therapy, despite tuberculosis chemoprophylaxis. Design: 520 patients who were receiving anti TNF-α treatment in the last 3 years were evaluated retrospectively. Radiological imaging tuberculin skin test (TST), history of tuberculosis, BCG vaccine, chemoprophylaxis administration, used anti TNF-α drugs were recorded. Results: There were 265(51.0%) of the patients with ankylosing spondylitis (AS), 175(33.7%) with rheumatoid arthritis, 35(6.7%) with Crohn's, 10(1.9%) with ulcerative colitis (UC), 21(4.0%) with psoriatic arthritis, 14(2.7%) with psoriasis vulgaris. In total, 455 (79.6%) patients were given INH prophylaxis. Active tuberculosis development was observed in five patients (4: pulmonary,1: extrapulmonary; 3: UC, 2:AS) who all received anti TNF-α treatment (0.96%), infliximab. Three patients had tuberculosis disease in the 6th month, and the other 2 patients in the 5th and 24th month of their anti TNF-α treatments, and two had 9-month, and 1 had 6-month chemoprophylaxis history. Conclusion: The incidence of tuberculosis development in patients treated with anti TNF-α was found to be higher than the general population. In our country, where tuberculosis is still prevalent, patients receiving Anti TNF-α treatment (especially in-fliximab) should be carefully questioned and examined about tuberculosis

The effect of carbon insole use on foot plantar pressure distribution in individuals with pes planus and pes cavus

Amaç: Çalışmada kişiye özel üretilen karbon tabanlık kullanımının, pes planus veya pes kavusu olan bireylerde dinamik ve statik plantar basınç analizine etkisini değerlendirmek amaçlanmıştır. Yöntem: Çalışmaya tabanlık kullanması reçete edilen 30 gönüllü birey cinsiyet ayrımı gözetmeksizin dahil edildi. Ağrı değerlendirmesi için Görsel Analog Skala (GAS), dinamik ve statik plantar basınç analizi için sensor medica pedobarografik cihaz ve yaşam kalitesi için Kısa Form-36 Yaşam Kalitesi Anketi kullanıldı. Kişiye özel karbon tabanlık üretilip, katılımcıların 6 ay kullanması istendi. Analizler tekrarlı ölçümlü Anova testi ile başlangıçta, 2. ve 6. ayda yapıldı. Sonuçlar: Karbon tabanlık kullanımı öncesi ilk ölçüm, 2. ve 6. ayda yapılan GAS değerlendirmelerinde (p<0,001), dinamik pedobarografik ölçüm analizlerinde (p<0,05) ve sağ ve sol ayağa binen ağırlık yüzdesi dışında diğer statik pedobarografik ölçüm analizlerinde (p<0,05) istatistiksel düzeyde anlamlı farklılık elde edildi. Yaşam kalitesinin sosyal fonksiyon hariç tüm diğer alt başlıklarında istatistiksel düzeyde anlamlı değişiklik belirlendi (p<0,05). Tartışma: Pes planus veya pes kavusa sahip bireylerde kişiye özel karbon tabanlık kullanımının ayak ağrısını azalttığı, statik ve dinamik plantar basınç analizi ile yaşam kalitesi üzerinde olumlu etkisi olduğu belirlenmiştir.Purpose: The aim of this study was to evaluate the effect of using custom made carbon insoles on dynamic and static plantar pressure analysis in individuals with pes planus or pes cavus. Methods: Thirty volunteers who were prescribed to use insoles were included in the study, regardless of gender. The Visual Analogue Scale (VAS) was used for pain assessment, and the sensor medica pedobarographic device for dynamic and static plantar pressure analysis and Short Form-36 Quality of Life Questionnaire for quality of life. Personalized carbon insoles were produced and the participants were asked to use it for 6 months. Analyzes were performed with repeated measures Anova test at baseline, at 2 and 6 months. Results: Before using carbon insoles; In the first measurement, 2nd and 6th month VAS evaluations (p<0.001), dynamic pedobarographic measurement analyzes (p<0.05), other static pedobarographic measurement analyzes except the percentage of weight on the right and left feet (p<0.05) statistically significant difference was obtained. A statistically significant change was found in all subtitles of quality of life except social function (p<0.05). Conclusion: The use of personalized carbon insoles in individuals with pes planus or pes cavus; it has been determined that it reduces foot pain and has a positive effect on quality of life with static and dynamic plantar pressure analysis

IMPLEMENTATION OF VIRTUAL REALITY ENHANCED CONTINUOUS PERFORMANCE TEST DESIGNED FOR ATTENTION DEFICIT HYPERACTIVITY DISORDER DIAGNOSIS

The purpose of the study is to implement a virtual reality (VR) enhanced continuous performance test (CPT) specifically designed as an aid to attention deficit hyperactivity disorder (ADHD) diagnosis with the newest enabling technologies. To realize such an objective, firstly, the VR technology enabled ADHD diagnosis methodologies are investigated and required metrics are analyzed. Then, a new model is constructed in order to measure the required metrics and an assessment methodology is adopted to evaluate such metrics to cooperate with the created VR application. As the contribution, a new measurement model and procedure are presented and the effectiveness of the system is going to be examined in future studies

Incidence and predictors of radial artery injury following transradial procedures: Yet another benefit of renin–angiotensin system blockade?

Background: Vasodilatory function of radial artery (RA) declines following the transradial catheterization. However, it is uncertain whether impaired vasodilatory function develops in every patient. The aim of this study was to investigate the incidence and predictive factors of impaired vasodilatory function following transradial procedures. Methods: Consecutive patients undergoing elective transradial procedures were prospectively enrolled. Ultrasound examination of RA was recorded just before and 1 week after the procedure. RA diameters and flow velocities were measured at baseline, after flow mediated vasodilation (FMD) and after nitrate mediated vasodilation (NMD). Results: Fifty-one patients were included (62 ± 11 years, 55% male, 41% hypertensive, 20% diabetic, 65% with coronary artery disease). Overall FMD and NMD were significantly impaired after 1 week. However, deterioration of FMD and NMD was observed in 67% and 71% of patients, respectively. Absolute change in FMD was significantly different in patients using a renin– angiotensin system (RAS) inhibitor compared to those who were not (1.9 ± 12.9 vs. –7.7 ± ± 12.7%, respectively, p = 0.025). Additionally, there was a moderate but significant correlation between baseline RA diameter and absolute change in NMD (r = 0.419, p &lt; 0.001). RAS blockade was independently associated with protection against FMD deterioration (OR 0.241, 95% CI 0.066–0.883, p = 0.032), whereas RA diameter (OR 0.079, 95% CI 0.009–0.720, p = 0.024) and procedure time (OR 1.156, 95% CI 0.989–1.350, p = 0.068) were associated with NMD deterioration, although the latter had borderline significance. Conclusions: Vasodilatory function of RA gets impaired in most patients following transradial procedures. RAS blockade seems to exert a protective role against deteriorating endothelium- dependent vasodilation, whereas smaller RA diameter and potentially longer procedure time are associated with impaired endothelium-independent vasodilation.

Selecting the best warehouse data collecting system by using AHP and FAHP methods

U zadnje su se vrijeme kompanije počele koristiti načinom skladištenja kako bi stekle prednost na tržištu, uporabom sustava linijskog koda i RFID (Radio Frekvencijska Identifikacija) u vođenju skladišta. U ovom se radu koriste AHP (Analytic Hierarchy Process) i FAHP (Fuzzy Analytic Hierarchy Process) pri izboru sustava linijskog koda ili RFID sustava za sustav koji će kompanija odabrati kao način skladištenja. Na donošenje odluke djeluju četiri kriterija: cijena, funkcionalnost, održivost i performansa. U odnosu na AHP, sustav linijskog koda preferira 68 %, a RFID 32 %. Kad se radi o FAHPu linijski kod preferira 72 %, a RFID 28 %. Prema tome, AHP vrijednosti se slažu s FAHP vrijednostima. Konačno, sustav linijskog koda je odabran kao sustav za vođenje podataka o skladištu, a smatra se da je FAHP relativno uspješniji kad se radi o opisu tog postupka donošenja odluke zbog njegove nejasnoće (fuzziness) i neodređenosti u odnosu na AHP metodu.Recently companies have begun to use their storage effectively to attain leadership in the market environment, utilizing Barcode and RFID (Radio Frequency Identification) systems for warehouse management. In this study AHP (Analytic Hierarchy Process) and FAHP (Fuzzy Analytic Hierarchy Process) are used to choose between Barcode and RFID systems for the company warehouse data collection system. This decision is affected by four criteria which are: cost, functionality, sustainability and performance. The barcode system was preferred by 68 % and RFID was preferred by 32 % according to AHP. For FAHP, barcode system was preferred by 72 % and RFID was preferred by 28 %. Consequently AHP values are consistent with FAHP values. Finally barcode system is selected for the company’s warehouse data collection system and FAHP is found to be relatively more sufficient in terms of description of this decision-making process because of its fuzziness and vagueness compared to AHP method