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Öğe 3D DOCUMENTATION OF PORTAL MUQARNASES IN ANATOLIAN MADRASAHS WITH DIGITAL CLOSE RANGE PHOTOGRAMMETRIC METHOD(UNIV AGEAN, DEPT MEDITERRANEAN STUD, 2017) Karabork, Hakan; Yaldiz, Esra; Karasaka, LutfiyeMuqarnases, which are one of the most significant building elements brought in the architecture by Islam art, are three dimensional and complex geometrical compositions that are made with prismatic elements constituted with specific rules in specific combinations, with both ornamental, bearing features. Therefore, the surveys of muqarnases require a long, fragile, dangerous and difficult process. At that point, photogrammetry works come in and make the process of survey short, free of danger and mistakes as a useful application. Digital close range photogrammetry is one of the most active and efficient methods among the works to protect and document the cultural heritage by the means of the improvements of digital technology. Within the scope of this study, the surveys of the muqarnases in the portals of the Anatolian Madrasahs in Konya, Karaman and Aksaray in Central Anatolia Region were obtained with the use digital close range photogrammetry technique and 3D documentation works were made. With the 3D works, morphological features and differences of the muqarnases were determined. It was aimed to contribute to works to protect and document Konya Karatay Madrasah, Karaman Hatuniye Madrasah and Aksaray Zinciriye Madrasah.Öğe Accuracy Analysis of Control Point Distribution for Different Terrain Types on Photogrammetric Block(UNIV OSIJEK, TECH FAC, 2018) Guntel, Ahmet; Karabork, Hakan; Karasaka, LutfiyeSince the digital orthoimage and orthomosaic maps have come to be used more and more as the fundamental basis for many studies, the demand for such products has been gradually increasing in the recent years. Owing to the fact that they can be produced more rapidly and cheaper than the traditional topographic maps, the orthoimage maps are currently much in demand. The production accuracy of the orthoimage maps, obtained through aerial photographs or satellite images, has been an important research topic. The number and distribution of the ground control points have a significant bearing on the accuracy of aerial triangulation. Therefore, the accuracy of the orthoimage maps, being the end products, is related to the number and distribution of the ground control points within the block. This study has aimed to study the influence of the number and distribution of ground control points and check points on the accuracy of aerial triangulation by using different GNSS/IMU systems. Five different configurations have been designed depending on the distribution of the ground control and check points within rectangular shaped blocks in different combinations and numbers. Such configurations were then tested in different types of terrain such as forest lands, residential and agricultural areas. The objective of the study was to identify the most ideal geodesic structure and the most accurate photogram metric triangulation adjustment suitable for various different systems based on such terrain classification. The results were evaluated based on the ASPRS accuracy standards.Öğe AN ANALYSIS OF BATHYMETRIC CHANGES IN ALTINAPA RESERVOIR(NORTH UNIV BAIA MARE, 2011) Ceylan, Ayhan; Karabork, Hakan; Ekizoglu, IlkeThe aim of this study was to determine changes in surface area and volume of the Altinapa Reservoir, in Turkey, according to the water levels. To adopt measures for collecting more water in dam reservoirs, lakes and ponds, to prevent water pollution, protect water sources and extend the service life of these facilities, it is important for users (Municipalities, SHW, Irrigation Unions etc.) to know the current topographic conditions and any changes in the storage capacities of these facilities. Sedimentation is one of the most serious factors that threaten aquatic environments such as dams, lakes and ponds. Sedimentation causes some lakes, ponds and dams to be filled and polluted in a short time. It also causes loss of capacity and reduces the lifespan of the facilities. Changes in surface area and volume of the Altinapa Reservoir were identified by comparison of topographic and bathymetric data used for the management of the facility. Two ArcGIS digital elevation models, from 2009 and 1981, were used to determine changes in storage capacity of the reservoir. The calculations indicated that, within this 28-year period, the storage capacity of the reservoir decreased by 12.4% due to sedimentation. Furthermore, compared to volume data from 1967, when the dam was constructed, the water storage capacity was found to have decreased by 33.4%.Öğe A Case Study: Documentation Method with Close Range Photogrammetry of Muqarnas Which is to be an Ornamentation Type Specific to the Islamic Architecture(ELSEVIER SCIENCE BV, 2015) Karabork, Hakan; Karasaka, Lutfiye; Yaldiz, EsraThe preservation of historical and cultural heritage for future generations have has become one of the most important issue in terms of for human history. Muqarnas is one of the most important, detailed elements that Islamic art contributed to architecture. In this study, the survey of the muqarnas and crown door, which are to be a type of ornamentation specific to Islamic Architecture located in Konya city center belongs to the Anatolian Seljuk period, were obtained using close-range photogrammetry technique. The crown door and muqarnas of Alaaddin Mosque, Tas Mosque, and Karatay Medresseh were selected as the field study. This study is intended to contribute to the conservation and documentation of these valuable artefacts belonging to the Anatolian Seljuk period. (C) 2015 Published by Elsevier B.V.Öğe EVALUATION OF BEACH PROFILE CHANGES BY USING TERRESTRIAL LASER SCANNER(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2017) Koroglu, Aysun; Seker, Dursun Z.; Kabdasli, M. Sedat; Karabork, Hakan; Goktepe, Ayhan; Varol, Evren; Bayram, BulentExperimental investigations of coastal erosion generated by the action of irregular waves were carried out in laboratory flumes. It is well known that both the field surveys and the experimental studies are not precise enough to give details about the suspended sediment load due to wave action. In this study, different wave groups were generated over the beach profile and the amount of coastal erosion were measured using terrestrial laser scanner. Then obtained results were compared with the results gathered by means of conventional instruments. It was concluded that comparing to the conventional methods, laser scanners can be effectively used to define the beach profile changes under wave actions.Öğe Evaluation of Three-Dimensional Motion Analysis of the Upper Right Limb Movements in the Bowing Arm of Violinists Through a Digital Photogrammetric Method(SCIENCE & MEDICINE INC, 2009) Yagisan, Nihan; Karabork, Hakan; Goktepe, Ayhan; Karalezli, NazimViolin is one of the most widely taught string instruments in the world. The positions of the right tipper arm, elbow, and wrist and the vertical inclinations of the arm and forearm differ among violin players. The objective of this study was to measure the angular changes in the wrist and elbow joints, as well as the vertical inclinations of the arm, forearm, and hand, which are active in basic bow drives in violin playing, by using digital photogrammetric methods. In this way, we could determine the angular changes of the joints during bow drives, allowing Lis to incorporate this information into reaching proper bow techniques as well as preventing possible problems due to excessive force. This study involved nine Male University violin players. Certain anatomic areas were marked oil the players for measurement. The wrist and elbow joints of the right upper extremity were filmed on a calibrated test field using a metric camera, and images were transferred to the computer for photogrammetric evaluation using Pictran software (Technet GmbH, Germany). The angles of the elbow and wrist as well as the vertical inclinations of the arm, forearm, and hand of the right arm were ascertained from these marks on the photographs. The study showed that there are significant interindividual differences in the angular changes and inclinations on the E string and in the vertical inclinations on all strings among the different players. Med Probl Perform Art 2009; 24: 181-184.Öğe Joint angles during successful and unsuccessful tennis serves kinematics of tennis serve(TURKISH JOINT DISEASES FOUNDATION, 2009) Goktepe, Ayhan; Ak, Emre; Sogut, Mustafa; Karabork, Hakan; Korkusuz, FezaObjectives: The aim of this study was to investigate the joint angle differences in successful and unsuccessful tennis serves of junior tennis players. Patients and methods: Nine healthy junior tennis players (5 girls, 4 boys; mean age 11.8 +/- 0.8 years; height 153.6 +/- 7.2 cm; body mass index 42.3 +/- 4.1 kg; playing experience 6.2 +/- 1.5 years) volunteered to participate in this study. They were asked to perform tennis serves as fast as they can as if they were in an actual game. Successful and unsuccessful serves were recorded using two high speed cameras and then analyzed using Pictran software. Angle changes in pre-impact, impact and post-impact phases were compared. Results: The results of paired sample t-tests revealed nosignificant differences between successful and unsuccessful tennis serves in all three phases. Conclusion: This study failed to show differences between successful and unsuccessful tennis serves in pre-impact, impact and post-impact phases. However, future research with more detailed analyses would be needed to reveal the possible changes in the joints while serving.Öğe Mapping chlorophyll-a through in-situ measurements and Terra ASTER satellite data(SPRINGER, 2009) Nas, Bilgehan; Karabork, Hakan; Ekercin, Semih; Berktay, AliThis paper presents an application of water quality mapping through real-time satellite and ground data. The Lake Beysehir which is the largest freshwater lake and drinking water reservoir in Turkey was selected as the study area. Terra ASTER satellite image is used as remote sensing data source for water quality mapping in addition to simultaneously performed in-situ measurements. Ground data is collected simultaneously with the ASTER overpass on June 09, 2005 over the Lake Beysehir. The spatial distribution map is developed by using multiple regression (MR) technique for water quality parameter, which is chlorophyll-a (chl-a). The results indicate that simultaneous ground and satellite remote sensing data are highly correlated (R (2) > 0.86). In the image processing step, geometric correction, image filtering and development of water quality map procedures are performed with the ERDAS Imagine and ArcGIS 9.0 software. The trophic status of Lake Beysehir is considered to be oligotrophic with an average 1.55 A mu g/l chl-a concentration.Öğe PHOTOGRAMMETRIC APPROACH IN DETERMINING BEAM-COLUMN CONNECTION DEFORMATIONS(UNIV FEDERAL PARANA, CENTRO POLITECNICO, 2014) Koken, Ali; Koroglu, Mehmet Alpaslan; Karabork, Hakan; Ceylan, AyhanIn accordance with the advances in technology, displacement calculation techniques are ever developing. Photogrammetry has become preferable in some new disciplines with the advances in the image processing methods. In this study, the authors have used two different measurement techniques to determine the angles of rotation in beam-column connections that are subjected to reversible cyclic loading. The first of these is the method that is widely used, the conventional method in structural mechanics experiments, where Linear Variable Differential Transformers (LVDTs) are utilized; and the second is the photogrammetric measurement technique. The rotation angles were determined using these techniques in a total of ten steel beam-column connection experiments. After discussing the test procedures of the aforementioned methods, the results were presented. It was observed that the rotation angles measured by each method were very close to each other. It was concluded that the photogrammetric measurement technique could be used as an alternative to conventional methods, where electronic LVDTs are used.Öğe Seasonal and spatial variability of metals concentrations in Lake Beysehir, Turkey(TAYLOR & FRANCIS LTD, 2009) Nas, Bilgehan; Berktay, Ali; Aygun, Ahmet; Karabork, Hakan; Ekercin, SemihLake Beysehir is the largest fresh water lake and also the largest reservoir for drinking, and irrigation water in Turkey. The lake has an area of 656 km2 with an average depth of 5 m. Metal concentrations of aluminium (Al), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), nickel (Ni), lead (Pb) and zinc (Zn) were determined in Lake Beysehir on 9 June and 19 August 2005, and 12 June and 22 August 2006. The water samples were collected from 40 sampling stations. The aim of this research is to determine metal concentrations and their seasonal and spatial variability in the lake. Generally, metal concentrations of Lake Beysehir were found to decrease in the sequence of Fe Al Zn Cr Ni Pb Cu Cd as 92.8, 81.8, 7.4, 2.7, 2.2, 1.9, 1.7 and 0.5 g L-1, respectively. The results showed that the mean concentrations of the metals in the lake water did not exceed WHO (World Health Organization), US EPA (Environmental Protection Agency) or TWQCR (Turkish Water Pollution and Control Regulations) drinking water guidelines. On the other hand, maximum levels of metals sporadically exceeded these standards in some sampling stations, especially for Al, Cr, Fe, and Pb.Öğe A Study on Measurement of Building Wall Thickness From 3D Object Model(Academic Journals, 2010) Altuntaş, Cihan; Yıldız, Ferruh; Göktepe, Ayhan; Karabork, HakanTechnological developments provide new methods for the measurement of 3D point data and information extraction from them. Terrestrial laser scanning is the latest method to 3D surveying and modeling. All geometric information belonging to the object or scene can be extracted from terrestrial laser scanner (TLS) data. The aim of this work is measurement of wall thickness of a building, which was built to protect the Alaaddin Palace, creating of cross-section by laser scanning data. We surveyed the building by TLS and performed 3D model. Then cross-sections were created from point clouds to measurement wall thickness of concrete building.Öğe Three-Dimensional Measurements of Glenohumeral Joint Surfaces in Sheep, Cat and Rabbit by Photogrammetry(MEDWELL ONLINE, 2009) Karabork, HakanThe aim of this study, was the 3-dimensional analysis of the glenohumeral joints of the sheep, cat and rabbit. Twelve glenohumeral joints of animals were examined as materials. The surface areas of the glenoid cavity and the caput of the humeral head, the maximum cranio-caudal and medio-lateral depths of the glenoid cavity, the maximum cranio-caudal and medio-lateral heights of the humeral head, the cranio-caudal and medio-lateral curvature distances of the glenoid cavity and the cranio-caudal and medio-lateral curvature distances of the humeral head were measured by photogrammetric technique in the animals. Ratios amongst surface area of glenoid cavity and caput of humeral head, maximum cranio-caudal depth of glenoid cavity and height of humeral head, maximum medio-lateral depth of glenoid cavity and height of humeral head, cranio-caudal curvature distance of glenoid cavity and humeral head and medio-lateral curvature distance of glenoid cavity and humeral head were determined. The sheep had the largest values for the glenohumeral joint, except for some ratios. Cats had the smallest ratios for all measured values. As a result, this photogrammetric technique may be useful for veterinary anatomy and surgery.Öğe Transverse Carpal Ligament and Forearm Fascia Release for the Treatment of Carpal Tunnel Syndrome Change the Entrance Angle of Flexor Tendons to the A1 Pulley: The Relationship between Carpal Tunnel Surgery and Trigger Finger Occurence(HINDAWI LTD, 2013) Karalezli, Nazim; Kutahya, Harun; Gulec, Ali; Toker, Serdar; Karabork, Hakan; Ogun, Tunc C.Purpose. The appearance of trigger finger after decompression of the carpal tunnel without a preexisting symptom has been reported in a few articles. Although, the cause is not clear yet, the loss of pulley action of the transverse carpal ligament has been accused mostly. In this study, we planned a biomechanical approach to fresh cadavers. Methods. The study was performed on 10 fresh amputees of the arm. The angles were measured with (1) the transverse carpal ligament and the distal forearm fascia intact, (2) only the transverse carpal ligament incised, (3) the distal forearm fascia incised to the point 3 cm proximal from the most proximal part of the transverse carpal ligament in addition to the transverse carpal ligament. The changes between the angles produced at all three conditions were compared to each other. Results. We saw that the entrance angle increased in all of five fingers in an increasing manner from procedure 1 to 3, and it was seen that the maximal increase is detected in the middle finger from procedure 1 to procedure 2 and the minimal increase is detected in little finger. Discussion. Our results support that transverse carpal ligament and forearm fascia release may be a predisposing factor for the development of trigger finger by the effect of changing the enterance angle to the A1 pulley and consequently increase the friction in this anatomic area. Clinical Relevance. This study is a cadaveric study which is directly investigating the effect of a transverse carpal ligament release on the enterance angle of flexor tendons to A1 pulleys in the hand.
