An analysis on the corrosion of a cultural heritage

Many historical landmarks and cultural heritage are being constantly destroyed through natural events and human actions. It is important to conduct corrosion analysis and two and three-dimension documentation studies to restore and transfer these landmarks to the new generations. It is particularly important to record, keep these historical heritages digitally and take precautions against the potential corrosion due to the wars, natural disasters and climatic factors that continue to the present. In this study, the corrosion in Çanlı Church (ÇanlıKilise) located in Akhisar village of the province of Aksaray in Turkey was determined and the reasons were examined. By using close-range photogrammetry method, three-dimension models and facade charts of three facades (North, West, South) of Çanlı Church have been acquired, as a result of measurements performed in four different times (2006, 2010, 2016, 2019). Overlapping all these charts in the same scale, the corrosions occurred on the facades of Çanlı Church have been examined. The meteorological data within the period when the measurements were performed were reviewed. As a result, corrosion on the North, West and South facades of Çanlı Church have been found at the level of 8%, 3%, 13% respectively. It was concluded that the storm has greater effect on the corrosion

Calculating the volume of rock blocks with classical and photogrammetric methods: a case study of Selime, Aksaray

Kapadokya bölgesinde bulunan peri bacaları ve kayalık alanlar, yağmur, rüzgâr, sıcaklık ve diğer fiziki etmenler nedeniyle sürekli deformasyona maruz kalmaktadır. Bu deformasyonlar ve kayaç yapıları nedeniyle bölgede çok fazla kaya düşmesi olayı meydana gelmektedir. Bu çalışmada, düşen ve düşme potansiyeli olan kaya bloklarının hacimleri haritacılıkta gelinen en son teknolojik ölçme tekniği olan insansız hava aracı (İHA), yersel lazer tarayıcı (YLT) ve klasik yöntemler (fotoğraf ölçeklendirme ve çelik şerit metre) ile hesaplanmıştır. Çalışmada düşme potansiyeli olan kaya blokları belirlenmiş ve üç boyutlu (3B) olarak modellenmiştir. Çalışma alanı sınırları içerisinde seçilen dört farklı kaya bloğunun hacimleri üç farklı yöntemle hesaplanmış ve sonuçları karşılaştırılmıştır. Ayrıca, tüm yöntemlerin avantaj ve dezavantajları tartışılmıştır. Kaya bloklarının formu, hacmi ve şekli alan üzerinde düşecek olan bloğun sıçrama ve ilerleme mesafesinin hesaplanmasında önemli rol oynamaktadır. Ayrıca, ortaya çıkacak olan zararın büyüklüğünü belirleyecektir. Bu nedenle bu tür çalışmalarda hassas modelleme ve hacim bilgileri oldukça büyük öneme sahiptir.Fairy chimneys and rocky areas in the Cappadocia region are subject to constant deformation due to rain, wind, temperature and other physical factors. Due to these deformations and rock structures, many rock falls occur in the region. In this study, the volumes of fallen rock blocks were calculated by using the latest technological measurement technique, unmanned aerial vehicle (UAV), terrestrial laser scanner (YLT) and classical methods (photo scaling and tape measurement). Detailed 3D model of study area was created. The volumes of selected four different rock blocks were calculated by three different methods and the results were compared in this study. In addition, advantages and disadvantages of all methods are discussed. The form, volume and shape of the rock blocks play an important role in the calculation of fallen rock's jump and advance distance over the area. It will also determine the magnitude of the damage that will occur. Therefore, precise modeling and volume information are of great importance in such studies

Paroksismal atriyal fibrilasyonlu hastalarda ablasyon sonrası rekürrens ile otonom sinir sistemi aktivitesi arasındaki ilişkinin değerlendirilmesi

Introduction: In this study, we aimed to investigate the relationship between autonomic dysfunction (AD) deter- mined according to the blood pressure (BP) and heart rate (HR) response in exercise treadmill test (ETT) prior to cryoballoon ablation (CBA), and the recurrence of atrial fibrillation (AF) after CBA in patients with paroxysmal AF. Patients and Methods: Seventy-six patients (mean age 53 ± 11 years, 61.8% male) with paroxysmal AF who underwent CBA were enrolled. Before CBA the ETT was performed by all patients. BP and HR responses in ETT were compared between patients with and without AF recurrence. Results: AD rate was significantly higher in the group with recurrence compared to the non-recurrent group (p 0.05 for all). Examining AD parameters, systolic blood pressure at peak exercise (SBPpeak) (p 0.05 for all ). OD parametreleri incelendiğinde, maksimum egzersizdeki sistolik kan basıncı (188.89 ± 28.13 vs 157.60 ± 28.82, p< 0.001), maksimum egzersizdeki diyastolik kan basıncı (87.47 ± 16.89 vs. 72.02 ± 15.43, p< 0.001), yavaş kalp hızı iyileşmesi [11 (%57.9) vs. 8 (%14), p< 0.001] CBA sonrası AF rekürrensi ile ilişkili bulunmuştur. Sonuç: OD lone AF’li hastalarda CBA sonrası AF rekürrensi ile ilişkili olabilir. Maksimum egzersizdeki sistolik kan basıncı, maksimum egzersizdeki diyastolik kan basıncı, yavaş kalp hızı iyileşmesi ablasyon sonrası AF rekürrens prediktörü olarak bulunmuştur

Angio-seal used as a bailout for incomplete hemostasis after dual perclose ProGlide deployment in transcatheter aortic valve implantation

Background: The failure rate of vascular closure devices remains a significant cause of major vascular complications in contemporary transcatheter aortic valve implantation practice. Methods: This research aimed to evaluate use of the Angio-Seal device in a bailout context in the setting of incomplete hemostasis following use of dual Perclose ProGlide devices in patients undergoing transfemoral transcatheter aortic valve implantation. A total of 185 patients undergoing transfemoral transcatheter aortic valve implantation with either dual Per-close ProGlide (n = 139) or a combination of dual Perclose ProGlide and Angio-Seal (n = 46) were retrospectively analyzed. The baseline, procedural characteristics, and all outcomes (defined according to Valve Academic Research Consortium-2 criteria) were compared. Results: No significant differences were seen between the dual Perclose ProGlide vs dual Perclose ProGlide+Angio-Seal groups with regard to the in-hospital Valve Academic Research Consortium-2 primary end points of major vascular complications (n = 13 [9.4%] vs n = 2 [4.3%]; P =.36), minor vascular complications (n = 13 [9.4%] vs n = 8 [14.7%]; P =.14), major bleeding (n = 16 [11.5%] vs n = 2 [4.3%]; P =.25), and minor bleeding (n = 9 [6.5%] vs n = 5 [10.9%]; P =.34), with higher rates of hematoma in the dual Perclose ProGlide+Angio-Seal group (n = 4 [2.9%] vs n = 5 [10.9%]; P =.044). Conclusion: Finding from the current study suggest that adjunctive Angio-Seal deployment may be feasible and safe, especially in patients with incomplete hemostasis following dual Perclose ProGlide use, and can be an optimal “bailout” procedure. (Tex Heart Inst J. 2022;49(6):e217684)

Changes in electrocardiographic p wave parameters after cryoballoon ablation and their association with atrial fibrillation recurrence

Background: Changes in P wave parameters after circumferential pulmonary vein isolation (CPVI) have been previously identified. In this study, we aimed to determine the changes in P wave parameters surface electrocardiogram (ECG) after cryoballoon ablation (CBA) for atrial fibrillation (AF) and evaluate their relationship with AF recurrence. Methods: Sixty-one patients (mean age 53 ± 11 years, 50.8% male) with paroxysmal AF who underwent CBA were enrolled. A surface ECG was obtained from all patients immediately before the procedure, and repeated 12 hours after the procedure. P wave amplitude (Pamp), P wave duration (Pwd), and P wave dispersion (Pdis) values in preprocedural and postprocedural ECGs were measured and compared. Recurrence rates of AF in 3, 6, and 9 months following ablation were recorded for all patients. Changes in P wave parameters were compared between patients with and without AF recurrence. Results: Compared to preprocedural measurements, Pamp (from 0.58 ± 0.18 mV at baseline to 0.48 ± 0.17 mV, P 0.05). Conclusion: Pamp, Pwd, and Pdis parameters exhibited significant decrease after CBA compared to preprocedural measurements. Decreased Pamp was shown to be a predictor for good clinical outcomes following CBA

Kapodakya (Selime-Aksaray) bölgesindeki doğal sit alanındaki değişimlerin yersel lazer tarama teknoloji kullanılarak üç boyutlu modelleme ile belirlenmesi

*Bu çalışma Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK) tarafından 106M057 nolu ve “Kapadokya (Selime-Aksaray) Bölgesindeki Doğal Sit Alanındaki Değişimlerin Yersel Lazer Tarama Teknoloji Kullanılarak Üç Boyutlu Modelleme İle Belirlenmesi” isimli proje kapsamında desteklenmiştir. Proje çalışanları olarak bilimsel araştırma ve geliştirme çalışmalarına azami ölçüde destek veren TÜBİTAK’a teşekkür ederiz.Ülkemiz tarihi, kültürel ve turistik mirası oldukça fazla olan bir ülkedir. Bu kültür hazinelerinden biri de Kapadokya bölgesidir. Bölge birçok medeniyete ev sahipliği yapmış, peribacalarının, kiliselerin, camilerin, heykellerin, tarihi eserlerin, yer altı şehirlerinin, tarihi evlerin, mağaraların, kervansarayların, külliyelerin, türbelerin, anıt mezarların bulunduğu tarihi, kültürel ve turizm açısından oldukça zengin bir yerleşim alanıdır. Kapadokya Bölgesi 60 milyon yıl önce; Erciyes, Hasandağı ve Güllüdağ’ın püskürttüğü lav ve küllerin oluşturduğu yumuşak tabakaların milyonlarca yıl boyunca yağmur ve rüzgâr tarafından aşındırılmasıyla ortaya çıkmıştır. Yağmurlar çatlaklardan sızıp yumuşak tüfü aşındırmaya başlamıştır. Isınan ve soğuyan hava ile rüzgârlar da oluşuma katılmıştır. Sonuçta Peri Bacası şeklindeki doğal oluşumlar meydana gelmiştir. Proje Kapadokya (Selime-AKSARAY) bölgesindeki doğal sit alanında bulunan Peri Bacalarındaki muhtemel aşınmanın üç boyutlu modelleme çalışmaları ile belirlenmesini amaçlanmıştır. Düzensiz yüzeylerin üç boyutlu modellerinin elde edilmesinde etkili olan yersel lazer tarama metodu kullanılmıştır. Ayrıca yersel fotogrametrik yöntemle de üç boyutlu modelleme çalışmaları yapılmış ve jeodezik ölçmelerle peri bacalarındaki muhtemel kopmalar araştırılmıştır. Çalışmada bölgenin jeolojik yapısı incelenmiş, proje süresi boyunca meteorolojik veriler alınmış ve jeolojik yapı, iklimsel şartlar ve aşınma arasındaki ilişki araştırılmıştır

Close range photogrammetry in volume computing

WOS: 000273821800007Cutting and filling volume calculations are important issues in many engineering and mining disciplines such as mining industry, open cast mining automation, and surface mining. Accurate 3D shape reconstruction and volume estimation are important in many applications, for example, erosion studies, estimation of ore removed from a mine face, and terrain assessment for construction.Scientific Research Projects Division of Nigde University [2004/08]This study is supported by the Scientific Research Projects Division of Nigde University. Project Number: 2004/08

The effect of interpolation methods in surface definition: An experimental study

Mappings of the earth surface and their representation in 3D (three‐dimensional) models are commonly used in most recent research. Modeling research, which starts with classical surveying methods, acquires new dimensions matching the modern technologies. 3D models of any object or earth surface can be used in much visual and scientific research. A digital model of the landscape is an important part within creation of geo‐information systems used in the public administration and in the commercial sphere. It is an important tool in applications such as geomorphology, hydrology, geology, cartography, ecology, mining etc. Values of volume in terrains that do not have regular geometric structure can be obtained more accurately by using 3D models of surfaces with respect to developing technology. Basic data of 3D models must indicate 3D coordinates of the surveyed object in the reference frame. Distribution and intensity of points are important factors in modeling earth surfaces. A minimum number of points is desired in defining an object in 3D. Interpolation methods employing different mathematical models are used to obtain 3D models of terrain surfaces. In this study, the effect of interpolation methods in defining a terrain surface is investigated. For this purpose, a uniform surface, hill‐shaped artificial object with a known volume is employed. The 3D surface and volume are calculated by using 12 different interpolation methods. Point distribution, point intensity and accuracy of point measurements are not considered. The same data set was used for all the interpolation methods. The interpolation methods are compared and evaluated based on the results...

Computing of volume of excavation areas by digital close range photogrammetry

Yılmaz, Hacı Murat ( Aksaray, Yazar )Performance of volume calculation by digital close range photogrammetry has been investigated. The potential use of 3D photomodelling in volume calculation of complex objects which may not be accessible and are sometimes in a risky location was studied using an excavation area and a natural hill as examples. The volumes obtained from 3D photomodels of objects were compared with the volumes calculated using geodetic techniques. The results were analyzed with respect to time, cost, and accuracy. It was found that the photogrammetric method has advantages of 21.89% in time, 12.11% in accuracy, and 33.33% in cost as compared to the classical method...

Temporal monitoring of water level changes in Seyfe lake using remote sensing

WOS: 000260579000008The Earth's water resources are endangered by inconsiderate use, pollution and lack of conservation measures. Temporal monitoring is necessary for the conservation and usage planning of water resources, and to make informed decisions. Seyfe Lake and its environs in Turkey is one of, the most important water basins in the world because it is a node on bird migration paths between Europe, Asia and Africa. for this reason, the International Council of Bird Preservation (ICBP) has registered 27 of the bird species living, at Seyfe Lake on the conservation list. In this work, the temporal changes in the water surface area of Seyfe Lake and its environs, which are important for ecological, historical and tourism reasons, are investigated. The change of water surface in the lake is examined over a 26 year period using satellite images taken between 1975 and 2001. Landsat images from years 1975, 1987 and 2001 are used. The change is tracked from the images using an unsupervised classification method. A decrease of slightly more than 33% was observed in the water surface area this 26 year period. The temporal change indicated by the images was compared with the related meteorological data between 1975 and 2001. Over this time period, climate conditions (rainfall, temperature and evaporation) in the study area have been changed by approximately 21%. These changes could have affected the Lake surface area, but also could external human interference around the Lake