Browsing by Author "Akin, M."

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Crossed Testicular Ectopia: Report of Six Cases
(Medknow Publications, 2014) Akin, M.; Erginel, B.; Bilici, S.; Gedik, S.; Yildiz, A.; Karadaǧ, C.A.; Dokucu, A.I.
Crossed testicular ectopia or transverse testicular ectopia is an extremely rare anomaly characterised by migration of one testis towards the opposite inguinal canal, usually associated with unilateral inguinal hernia. This report describes six cases of crossed ectopic testes, one of the largest series, and with unusual clinical histories. © 2014 African Journal of Paediatric Surgery. All rights reserved.
Determination of Dynamic Soil Properties of Van Yuzuncu Yil University Campus for the Preparation of Microzonation Map
(TMMOB - Jeoloji Muhendisleri Odasi, 2015) Akin, M.K.; Akin, M.; Akkaya, İ.; Özvan, A.; Üner, S.; Selçuk, L.; Tapan, M.
One of the most important factors causing loss of life and property during earthquakes is the soil conditions that the structure is built on. Determination of the soil engineering properties for understanding the behavior of ground under dynamic loads and/or minimizing the losses that may occur is quite crucial. The earthquakes occured in our country especially in 1999 and later on, and the resulting loss of life and property once more emphasized the importance of the social and economic dimensions of the impact created by the earthquake. Dynamic soil properties must be studied in accordance with the principles of microzonation considering the natural disasters such as earthquake. For this aim, the dynamic soil properties of Van Yuzuncu Yil University campus area are determined. Liquefaction, soil amplification and the like for the campus area are investigated through field studies conducted in order to reveal the ground conditions, and consequently the suitability for settlement is evaluated to guide the future planning of the campus. © 2015, TMMOB - Jeoloji Muhendisleri Odasi. All Rights Reserved.
Determination of Some Pomological Features of Bilberries (Vaccinium Myrtillus L.) Native To Sarıkamış (Kars), Turkey
(Centenary University, 2019) Akin, M.; Eyduran, S.P.; Gazıoğlu Şensoy, R.ı.; Eyduran, E.
This study was carried out to evaluate some physical and chemical properties of wild bilberry fruits collected from Sarıkamış forest of Kars province in Eastern Anatolia Region of Turkey. For this purpose, berry width, berry length, berry weight, pH, titratable acidity content (TAC), soluble solid content (SSC), taste, aroma, L*, a*, and b* color values were measured based on 4 replications of 20 fruit samples each from 20 plant genotypes. The results were interpreted on average values. Average values for width, length, weight, pH, TAC, SSC, taste, aroma and L*, a*, b* color values of berries were found as: 9.12 mm, 8.02 mm, 5.08 g, 2.22, 2.70%, 7.41%, 2.95, 3.00, 14.88, 1.72 and 0.06, respectively. Range values for the corresponding characteristics were determined as: 7.55 to 10.37 mm, 6.95 to 9.80 mm, 3.00 to 7.00 g, 2.04 to 2.60 %, 2.40 to 3.00 %, 6.00 to 8.50, 2.00 to 4.00, 13.24 to 16.30, 1.004 to 3.04 and -1.98 to 3.87, respectively (There is no aroma interval between these values). The current research is a preliminary evaluation for some physical and chemical characteristics of wild bilberries native to Sarıkamış district. Consequently, more detailed studies should be conducted on further physical and chemical characteristics of bilberries for breeding purposes and to gain baseline knowledge on the flora of Turkey. © 2019, Centenary University. All rights reserved.
Evaluation of Rockfalls With 3-Dimensional Probabilistic Analyses and Empirical Methods: the Case of the Kayseri – Soğanlı Settlement
(TMMOB Chamber of Geological Engineers, 2023) Varol, O.O.; Akin, M.; Orhan, A.; Dinçer, İ.
This study evaluated the potential rockfall hazards in the Kayseri-Soğanlı settlement using the energy angle method and 3-dimensional probabilistic rockfall modeling. The high-resolution digital surface model (DSM) was obtained with the help of unmanned aerial vehicles (UAV) and high-resolution orthophoto. 3-dimensional probabilistic rockfall simulations were conducted on the DSM using the CONEFALL software, and rockfall zones were determined according to the energy line angle method. The dimensions of previously fallen rock blocks were determined using fieldwork and orthophoto generated by UAV. As a result of 3-dimensional probabilistic analyses, the maximum kinetic energy values of 15,000 kJ and bounce height of 15 m were determined during the movement of 3-meter rock blocks along the slope. When the energy line angle method was considered, it was found that the previously fallen blocks were mostly concentrated in the 40° energy line angle zone in the southern part of the slope. On the other hand, although the rolling lines obtained from probabilistic 3-dimensional rockfall analyses for 3 metre block size reach up to the maximum 30° energy line angle zone, these rolling lines end in the 40° energy line angle zone, especially in the southern part of the slope. Therefore, the empirical method, 3-dimensional probabilistic method, and the positions of measured blocks in the field show general consistency. © 2023, TMMOB Chamber of Geological Engineers. All rights reserved.
Evaluation of the Rockfall Potential of Kastamonu Castle Using 3-D Analysis
(Springer Science and Business Media Deutschland GmbH, 2013) Akin, M.; Topal, T.; Akin, M.K.
The Kastamonu Castle is one of the magnificent monuments of the Kastamonu province (Turkey) located on a steep sandstone hill with Eocene age. The surrounding settlement around the castle suffered from numerous rockfall events in the past. Rockfalls after an initial block toppling are controlled by a bedding plane and two joint sets existing in the sandstone. The rockfall potential along the entire castle perimeterwas evaluated bymeans of three-dimensional (3-D) rockfall analyses using the ROTOMAP software. Rockfall initiation wasmodelled along a detachment line situated just below the castle walls. The results indicate that the maximum run-out distances around the castle exceed the settlement boundary on the western, southern, and eastern sides. The northern part of the castle is less critical due to lower slope gradient. In order to protect the settlement from falling blocks, vital remedial measures are suggested. © Springer-Verlag Berlin Heidelberg 2013.
Investigation of Slope Stability of Avnik (Bingöl) Open Pit Iron Mine by Different Methods
(Hacettepe Universitesi Yerbilmleri, 2023) Varol, O.O.; Ayhan, M.; Akin, M.
Avnik iron mine is the most important iron mine in our country, that is located in southeast of Bingöl province. In this study the slope stability of the Avnik iron mine that has a depth of 333 m was examined. In the field works, discontinuity survey was done and discontinuties properties were determined. As a result of the field studies, it was revealed that the metamorphic rocks in the study area have a highly fractured and fissured structure. On the other hand, instabilities with combined failure surfaces developed at two different the open pit mine previously. Corss - sections were taken along the open pit slopes which have critical stability condition and slope stability analyzes were performed on these cross - sections using limit equilibrium and finite element methods for static - dry and dynamic - dry conditions. According to the results of both methods, it wasdetermined that the factor of safety values for the slopes in the north of the open pit decreased in dynamic conditions and approached the critical limit equilibrium state. © 2023, Hacettepe Universitesi Yerbilmleri. All rights reserved.
Rockfall Hazard Analysis for an Historical Castle in Kastamonu (Turkey)
(Springer, 2012) Topal, T.; Akin, M. K.; Akin, M.
The Kastamonu Castle located on a sandstone hill with Eocene age is one of the most historical and touristic places in Kastamonu city center. The settlement of the city expanded towards the hill of the Kastamonu Castle and adversely affected by rockfalls in the past. The rockfall problems around the castle could be related to jointing, weathering, freezing-thawing and earthquake effects or a combination. In this study, the rockfall hazard at the castle is evaluated by two-dimensional rockfall analyses along 17 profiles selected in different orientations. Different size of rock blocks and various types of movements are taken into consideration in the analyses. Fall-out distance, bounce height, kinetic energy and velocity of the sandstone blocks are separately evaluated. The obtained data are used to define the possible rockfall hazard zones. Finally, the areas having potential rockfall risks are distinguished. Based on the evaluation of the data, rock bolting after removing of unstable blocks and supporting the area with the protective fences are suggested.
The Rockfall Potential of the Southwestern Part of Kastamonu Castle (Turkey) Based on 2-D and 3-D Analyses
(Springer International Publishing, 2014) Akin, M.; Topal, T.; Akin, M.K.
Urbanization around steep rock slopes with jointed rock masses is mostly under the threat of rockfalls. Numerous catastrophic rockfall hazards have been reported throughout the world due to the downslope movement of detached rocks. It is quite critical to determine the rockfall potential of a location considering rockfall trajectories, run-out distances, bounce heights and the kinetic energies of falling rocks. Therefore, the determination of rockfall paths requires the use of rockfall simulations. In practice, 2-D and 3-D models are most commonly employed during rockfall event modeling. The rockfall trajectories are simulated on a slope profile with X and Y axis in 2-D models, whereas 3-D models encompass a real space with X, Y and Z axis to calculate the rockfall paths. In this study, the rockfall potential of the southwestern part of the Kastamonu Castle, which is situated on a steep sandstone hill, was evaluated on the basis of 2-D and 3-D rockfall analyses using RocFall v.4.0 and ROTOMAP software, respectively. The close vicinity of the Kastamonu Castle, especially the southwestern region, is surrounded by residential houses and these settlements were adversely affected by disastrous rockfalls in the past. Based on 2-D and 3-D simulations, two different preliminary rockfall hazard maps were prepared and rockfall high-risk areas were defined. Both the 2-D and 3-D analyses pointed out that the southwestern part of the castle is under the great danger of rockfalls of which the weight of falling blocks may reach up to 10 tons. Finally, it is concluded that the maximum fall-out distances in 3-D analyses are more remote than those of 2-D analyses in the study area. © Springer International Publishing Switzerland 2014.
The Role of Capillary Water Absorption Characteristics of Ignimbrites on the Deterioration of Ahlat Seljuk Tombstones
(TMMOB - Jeoloji Muhendisleri Odasi, 2016) Akin, M.; Dinçer, İ.; Özvan, A.; Oyan, V.; Tapan, M.
The Seljuk Tombs of the Seljuk Empire in the Ahlat region are included in UNESCO’s World Heritage Tentative List due to the fact that the tombstones are known to be the largest graveyards of Muslims with their historical significance. Tombstones were erected using ignimbrite type pyroclastic rocks which are widespread in the region, and several inscriptions and patterns were carved on them thanks to their softness and easy processing. However, these tombstones have been subjected to weathering effects for almost a duration of 800 years. The most striking point after the inspection of tombstones is that many of them were broken from the middle section. In this study, experimental studies were carried out on fresh ignimbrite specimens and particularly the effect of capillary water absorption on deterioration was investigated to reveal the factors leading to deterioration of Ahlat Seljuk tombstones. Accordingly, high porosity and capillary water absorption characteristics of the ignimbrites are found to be the major reasons for the deterioration of tombstones. © 2016, TMMOB - Jeoloji Muhendisleri Odasi. All rights reserved.