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Bulunan: 649 Adet 0.001 sn
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THE USE OF PHYSICAL MODELING FOR UNDERSEA MINING DESIGN

BICER, N

Conference Object | 1994 | MINE PLANNING AND EQUIPMENT SELECTION 1994 , pp.757 - 764

3rd International Symposium on Mine Planning and Equipment Selection -- OCT 18-20, 1994 -- ISTANBUL, TURKEY WOS: A1994BB59Q00124

Comparison of drillability and abrasivity properties of rocks [Kayaçlari{dotless}n delinebilirlik ve aşi{dotless}ndi{dotless}ri{dotless}ci{dotless}li{dotless}k özelliklerinin karşi{dotless}laşti{dotless}ri{dotless}lmasi{dotless}]

Çapik M. | Yilmaz A.O. | Yaşar S. | Yarali O. | Çavuşoglu I.

Conference Object | 2013 | 23rd International Mining Congress and Exhibition of Turkey, IMCET 20131 , pp.659 - 669

Drillability is defined as the penetration rate of a drill bit into the rock. Abrasion is broken off by the tools during the excavation of rocks. Different types of rock formations have different abrasiveness and hardness properties and that is significantly affected excavatability and drillability in the mechanical excavation systems. Because, abrasive rocks and hard rocks lead to an increase of the cost excavation, decrease of the penetration rate and atrophy of the cutter in a short time. This study was carried out in Hopa-Borcka (Artvin) Cankurtaran Highway Tunnel. Rock samples were obtained from Cankurtaran Tunnel at the changi . . .ng rock formations for the laboratory studies. The test samples were prepared at the appropriate size and quantity. Sievers J-miniature drill test (SJ) and the brittleness tests were carried out and for the drilling rate index values were calculated. Cerchar Abrasivity Index (CAI), Norway Abrasion Value (AV) and Bohme abrasion tests were carried out and for abrasiveness of rock properties. Uniaxial compressive strength, point load strength and Brazilian tensile strength tests were determined for the calculations mechanical properties of rock Daha fazlası Daha az

Air Pollution And The Risk Of Venous Thromboembolism

Tor, M. | Cevik, C. | Kurcer, M. | Akbulut, S. | Altuntas, M. | Atalay, F.

Conference Object | 2010 | AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE181 , pp.659 - 669

WOS: 000208771000726

Classic Kaposi sarcoma with sarcoid-like granulomas: a case report and review of the literature

Kandemir, N. Onak | Yurdakan, G. Gamze | Bektas, S.

Conference Object | 2008 | HISTOPATHOLOGY53 , pp.396 - 397

27th International Congress of the International-Academy-of-Pathology -- OCT 12-17, 2008 -- Athens, GREECE WOS: 000259524800907

A preliminary geoengineering assessment of Bazda antique underground quarries in, Sanliurfa, Turkey

Agan, C. | Yesilnacar, M. I. | Genis, M. | Kulaksiz, S. | Ulusay, R. | Aydan, Oe | Yucel, M. D.

Conference Object | 2013 | ROCK MECHANICS FOR RESOURCES, ENERGY AND ENVIRONMENT , pp.93 - 98

Geoengineering evaluation of man-made antique underground structures improves and provides important information on such structures. Harran City in, Sanliurfa Province of Turkey was constructed probably during Sumerian period BC 3000 (5000 years BP). The building stones consisting of limestones of Harran City were extracted from open-pit and underground quarries known as Bazda quarries. Bazda antique underground quarry pillars suffer some structural stability problems in terms of splitting of high pillars, roof falls, plane or wedge sliding and large sinkholes. The authors have initiated a collaborative integrated research program t . . .o map the antique underground quarries having working levels up to four floor, in-situ rock characterization, identification of stability problems, some geomechanical properties of surrounding rock. This paper describes the first preliminary studies on Bazda antique underground quarries and discusses its implications in modern geomechanics and geoengineering Daha fazlası Daha az

Clinical characteristics of microtropia

Tomac, S | Sener, EC | Sanac, AS

Conference Object | 2001 | TRANSACTIONS: 27TH MEETING OF THE EUROPEAN STRABISMOLOGICAL ASSOCIATION , pp.77 - 80

Introduction: To investigate clinical characteristics of microtropia. Methods: Twenty patients with primary microtropia were studied. Results: Irvine prism test was positive in all the patients by using prisms of different strengths and positions. All the patients had abnormal fusion at near. At distance, 15 patients had abnormal fusion by the BSG and 8 patients had abnormal fusion by the W4D. Ten patients had gross stereopsis and the rest had no measurable stereopsis. Conclusions: All patients with microtropia have abnormal fusion, which does not guarantee the presence of stereopsis. The difference in fuson between near and distanc . . .e is due to the weakness of fusion. With occlusion treatment, amblyopia can be improved, whereas binocular defects of microtropia can not be improved Daha fazlası Daha az

Do Serum Inflammatory Biomarkers Differ In Stable COPD Patients With Chronic Bronchitis And Emphysema Phenotypes?

Tor, M. | Peynir, E. | Tekin, I. O. | Atalay, F. | Ornek, T.

Conference Object | 2015 | AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE191 , pp.77 - 80

International Conference of the American-Thoracic-Society (ATS) -- MAY 15-20, 2015 -- Denver, CO WOS: 000377582804528

Vibration analysis of euler-bernoulli beam based on the variational iteration method

Ozer H.

Conference Object | 2010 | 17th International Congress on Sound and Vibration 2010, ICSV 20104 , pp.2740 - 2745

The variational iteration method has been attracted much attention of researchers as a promising method for solving linear and nonlinear differential equations. This study presents a way of using the variational iteration method (VIM) to solve free vibration problems of uniform Euler-Bernoulli beams. The method depends on constructing a correction functional by a general Lagrange multiplier. An example is given to illustrate the accuracy and efficiency of the present method. Each iteration step gives a direct approximate solution to the problem. It is verified that the method is a powerful mathematical tool to get the solutions easi . . .ly by reducing the volume of calculations Daha fazlası Daha az

Vibro-acoustic analysis of post-impacted sandwich panels

Yetmez M. | Kocer L. | Erdogan H. | Demirci I.

Conference Object | 2015 | Materialwissenschaft und Werkstofftechnik46 ( 04.May ) , pp.440 - 445

In this study, the vibro-acoustic behaviour of centrally damaged honeycomb cored sandwich panels is investigated experimentally. For this purpose, experimental evaluations are completed by the followings: (I) honeycomb sandwich panels with two different core materials and the same skin materials are considered, (II) low-velocity impact measurements with three different projectiles are obtained, (III) vibration and vibro-acoustic tests are performed to present the vibration characteristics of the post-impacted sandwich panels with two different boundary conditions. Effect of core material and projectile geometry on modal and sound ch . . .aracteristics is examined. The results are given in tabular and graphical forms. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Daha fazlası Daha az

Three-dimensional regions in tunnels

Gercek H.

Conference Object | 2005 | Underground Space Use: Analysis of the Past and Lessons for the Future - Proceedings of the 31st ITA-AITES World Tunnel Congress1 , pp.157 - 162

In the stress and stability analysis of underground openings, cross-sectional plane-strain analyses are common; yet, in tunnels, there are some regions that must be analyzed three dimensionally. The typical examples of such regions are: the excavation face, portals, intersections with other underground openings, and regions with sudden geometrical changes. The paper involves some considerations regarding the stability and analysis of these three-dimensional regions. Significance of these regions and the problems encountered in such regions are discussed. Then, major considerations that should be taken into account during the stress . . .and stability analysis of the three-dimensional regions in tunnels are presented. © 2005 Taylor & Francis Group Daha fazlası Daha az

A new phase measurement technique for RF power amplifier only measuring magnitudes

Yuzer A.H. | Demir S.

Conference Object | 2010 | PIERS 2010 Cambridge - Progress in Electromagnetics Research Symposium, Proceedings , pp.170 - 173

In this study, a new phase measurement setup to measure magnitudes and phases of the fundamental components and intermodulation created by an amplifier under two tone excitation is reported. There are three signal generators, one digital attenuator and one spectrum analyzer in the measurement setup. There is no need to any other special electronic circuits (e.g., mixer, filter, etc.). Phase is found/measured mathematically based on magnitude measurements. Also absolute phase difference between the frequency components can be measured. Measured phase error is better than 1° for repetitive measurements.

Research Of Immunisation Status In COPD In Turkey (rimpact Study)

Ozlu, T. | Bulbul, Y. | Aydin, D. C. | Tatar, D. | Kuyucu, T. | Erboy, F. | Inan, H.

Conference Object | 2017 | AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE195 , pp.170 - 173

International Conference of the American-Thoracic-Society (ATS) -- MAY 19-24, 2017 -- Washington, DC WOS: 000400372500731

6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.

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