Karst hydrogeology of Kusluk-Dilmetas karst springs, Van-Eastern Turkey     

Murat H. Özler 《Environmental Geology》2001,41(3-4):257-268

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Erratum to “Compressional behavior of clayey sand and transition fines content” [Engineering Geology, 89(2007), 195–205]     

Mehmet Murat Monkul  Gurkan Ozden 《Engineering Geology》2008,96(1-2):105-106

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Digital underwater acoustic voice communications   总被引：2，自引：0，他引：2  

Woodward  B. Sari  H. 《Oceanic Engineering, IEEE Journal of》1996,21(2):181-192

This paper describes the design of an underwater acoustic diver communication system controlled by a digital signal processor. The speech signal transmission rate is compressed by using linear predictive coding (LPC) and the extracted parameters are transmitted through the water to a synchronized receiver by employing digital pulse position modulation (DPPM). The pulse position in each time frame is estimated by an energy detection and decision algorithm which enables the received LPC parameters to be recovered and used to synthesize the speech signal  相似文献   

Accuracy analysis, dem generation and validation using russian tk-350 stereo-images     

Gürcan Büyüksalih  Güven Koçak  Murat Oruç  Hakan Akçin  Karsten Jacobsen 《The Photogrammetric Record》2004,19(107):200-218

TK-350 stereo-scenes of the Zonguldak testfield in the north-west of Turkey have been analysed. The imagery had a base-to-height ratio of 0·52 and covered an area of 200 km × 300 km, with each pixel representing 10 m on the ground. Control points digitised from 1:25 000 scale topographic maps were used in the test. A bundle orientation was executed using the University of Hanover program BLUH and PCI Geomatica OrthoEngine AE software packages. Tests revealed that TK-350 stereo-images can yield 3D geopositioning to an accuracy of about 10 m in planimetry and 17 m in height. A 40 m resolution digital elevation model (DEM) was generated by the PCI system and compared against a reference DEM, which was derived from digitised contour lines provided by 1:25 000 scale topographic maps. This comparison showed that accuracy depends mainly on the surface structure and the slope of the local terrain. Root mean square errors in height were found to be about 27 and 39 m outside and inside forested areas, respectively. The matched DEM demonstrated a systematic shift against the reference DEM visible as an asymmetric shift in the frequency distribution. This is perhaps caused by the presence of vegetation and buildings.  相似文献   

Proposed support design, Kaletepe tunnel, Turkey     

D. Sari  A. G. Pasamehmetoglu 《Engineering Geology》2004,72(3-4):201-216

In this paper, preliminary support design of Kaletepe tunnel, located on Bilecik-Istanbul highway, Turkey, was analyzed by empirical and numerical methods. The rock mass rating (RMR) and rock mass quality (Q) systems were employed for empirical rock mass quality determination. Numerical analysis for the stress–strain distribution of the tunnel excavation and support systems was also carried out. The applied support performance was investigated at different sections of the tunnel route. It was seen that empirical and numerical approaches showed similar results. This indicates that when the empirical method is supported by numerical method, the preliminary support design will be more reliable.  相似文献   

Dietary overlap between invasion ctenophora (M. leidyi ) and anchovy (C. engrauliformis) in the southern parts of Caspian Sea     

F. Darvishi  A. Esmaili Sari  P. Farshchi 《International Journal of Environmental Science and Technology》2004,1(2):89-95

Mnemiopsis leidyi, native to America, Invaded the Caspian Sea in 1999. By the end of 2000, the entire sea was accupied with them. In parallel, a sharp decline in pelagic fish such accurrred.This survey was studied the relationship between the M. leidyi and this decline. Dietary analysis was conducted on anchovy sprat (Clupeonnela engrauliformis) and M. leidyi from August 2001 to October 2002 in the coastal water in the southern parts of Caspian Sea, in Iran. M. leidyi was caught by plankton net, (the mesh size ～5 mm), at three depth at 5, 10 and 15m. Sprat was caught by fisheries boat at Babolasar fishery harbor. Samples were not fixed in M. leidyi common fixative, 96% Ethanol were used. The Schoener index analysis reflected a similar diet composition of both species, with an critical level of overlap (>89 in Babolsar samples and >84 in Noushahar samples). This competition is one of the reasons for the decline of anchovy sprat. also, the results show M. leidyi is feeding on fish eggs, but effects of this factor on anchovy population is less than feeding competition. Controlling of M. leidyi population is reducing the pressure of its invasion and the effective approach is introduces a predator to the Caspian Sea.  相似文献   

Modelling the influences of climate change-associated sea-level rise and socioeconomic development on future storm surge mortality     

Simon J. Lloyd  R. Sari Kovats  Zaid Chalabi  Sally Brown  Robert J. Nicholls 《Climatic change》2016,134(3):441-455

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A database for fatalities and damages due to the earthquakes in Turkey (1900–2014)     

Murat Bikçe 《Natural Hazards》2016,83(3):1359-1418

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Evaluation of groundwater quality using a GIS-MCDA-based model: a case study in Aksaray,Turkey   总被引：1，自引：0，他引：1  

Murat Kavurmaci 《Environmental Earth Sciences》2016,75(18):1258

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Teleseismic finite-fault inversion of two <Emphasis Type="Italic">M</Emphasis><Subscript>w</Subscript> = 6.4 earthquakes along the East Anatolian Fault Zone in Turkey: the 1998 Adana and 2003 Bingöl earthquakes     

Murat Utkucu  Emrah Budakoğlu  Meltem Çabuk 《Arabian Journal of Geosciences》2018,11(22):721

The East Anatolian Fault Zone is a continental transform fault accommodating westward motion of the Anatolian fault. This study aims to investigate the source properties of two moderately large and damaging earthquakes which occurred along the transform fault in the last two decades using the teleseismic broadband P and SH body waveforms. The first earthquake, the 27 June 1998 Adana earthquake, occurred beneath the Adana basin, located close to the eastern extreme of Turkey’s Mediterranean coast. The faulting associated with the 1998 Adana earthquake is unilateral to the NE and confined to depths below 15 km with a length of 30 km along the strike (53°) and a dipping of 81° SE. The fixed-rake models fit the data less well than the variable-rake model. The main slip area centered at depth of about 27 km and to the NE of the hypocenter, covering a circular area of 10 km in diameter with a peak slip of about 60 cm. The slip model yields a seismic moment of 3.5?×?10¹⁸ N-m (M_w???6.4). The second earthquake, the 1 May 2003 Bingöl earthquake, occurred along a dextral conjugate fault of the East Anatolian Fault Zone. The preferred slip model with a seismic moment of 4.1?×?10¹⁸ N-m (M_w???6.4) suggests that the rupture was unilateral toward SE and was controlled by a failure of large asperity roughly circular in shape and centered at a depth of 5 km with peak displacement of about 55 cm. Our results suggest that the 1998 Adana earthquake did not occur on the mapped Göksun Yakap?nar Fault Zone but rather on a SE dipping unmapped fault that may be a split fault of it and buried under the thick (about 6 km) deposits of the Adana basin. For the 2003 Bingöl earthquake, the final slip model requires a rupture plane having 15° different strike than the most possible mapped fault.  相似文献