A5075335368- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Statistical and numerical algorithms
- Seismic Performance and Analysis
- earthquake and tectonic studies
- Seismic Waves and Analysis
- Geodetic Measurements and Engineering Structures
- Geomagnetism and Paleomagnetism Studies
- Structural Health Monitoring Techniques
- Computational Physics and Python Applications
- Inertial Sensor and Navigation
- Hydrology and Drought Analysis
- Dental Anxiety and Anesthesia Techniques
- Multi-Criteria Decision Making
- Geological Modeling and Analysis
- Advanced machining processes and optimization
- Climate variability and models
- Structural Integrity and Reliability Analysis
- Pediatric Pain Management Techniques
- Drilling and Well Engineering
- Railway Engineering and Dynamics
- Tunneling and Rock Mechanics
- Anesthesia and Sedative Agents
- Scientific Research and Discoveries
- Soil Geostatistics and Mapping
Karadeniz Technical University
2008-2025
United States Geological Survey
2009
Eskişehir Osmangazi University
2005
Abstract In 1999, the eastern coastline of Marmara region (Turkey) witnessed increased seismic activity on North Anatolian fault (NAF) system with two damaging earthquakes ( M 7.4 Kocaeli and 7.2 Duzce) that occurred almost three months apart. These events have reduced stress western segment NAF where it continues under Sea. The undersea segments been recently explored using bathymetric reflection surveys. recent findings helped scientists to understand seismotectonic environment basin,...
A precise gravimetric geoid model is computed utilising Stokes's formula, supposing an absence of topography above the geoid. Subsequently, undergoes a simple correction for topographic masses, constant density taken as 2670 kg/m3. Notably, true topographical mass deviates by approximately ±20% from this value. Recently, University New Brunswick in Canada released global at 30 arc-second resolution. This paper investigates impact incorporating on precision within mountainous region Colorado...
Influence of different models and assumptions with respect to seismic source modelling magnitude distribution on hazard results is examined, taking Jordan as a case study. Four alternative models, which are based combinations magnitude-recurrence relationships, considered. Seismic curves obtained at four sites in according these compared. In order display the spatial variation peak ground acceleration (PGA) values from difference maps for return periods 475 2475 years constructed. Logic tree...
Because ellipsoidal heights gained either through GPS, which is widely used in our age, or other means do not display the natural situation, they are far from meeting practical precision needs concerning height. Orthometric received geoid up more compatible with physical events and accepted thus, this very feature, can be successfully solving many problems practice related Obtaining orthometric traditional spirit leveling depends on weather conditions, costly requires too much labor time....
This paper focuses on making a comparing of GNSS/Levelling data and obtained from global geopotential models. For comparison, geoid undulations by method models have been used. As models, SGG-UGM-2, XGM2019e_2159, GO_CONS_GCF_2_TIM_R6e, ITSG-Grace2018s, EIGEN-GRGS.RL04.MEAN-FIELD, GOCO06s, GO_CONS_GCF_2_TIM_R6, GO_CONS_GCF_2_DIR_R6 GGMs are The sets used in the improvements altimetry, satellite, location topography. disparities between taken. Some statistical criteria for these differences...
Geopotential, dynamic, orthometric and normal height systems the corrections related to these are evaluated in this paper. Along two different routes, with a length of about 5 kilometers, precise leveling gravity measurements done. One routes is an even field while other rough field. The magnitudes orthometric, dynamic calculated for each route. Orthometric, differences acquired by adding obtained from geometric leveling. between compared. In addition, subtracting heights leveling,...
The ED50 datum uses the Hayford ellipsoid and Greenwich meridian as prime meridian. In Turkey, with was used until 2001, after which ITRF GRS80 became standard. To utilize coordinate systems across different datums, these must be associated transformed accordingly. This study determines 2D transformation parameters for converting to ITRF-96 datum. For this transformation, common points in both were selected Maçka Ortahisar districts of Trabzon province. two-dimensional similarity (Helmert)...
In this study, trend analysis of the sea level observations was made by using data from Sinop and Antalya tide gauge stations in Turkey. The aforementioned were downloaded as free General Command Mapping website web portal Turkish National Sea Level. Hourly gathered between 17th November 1998 15th January 2018 station used. Data with 15-minute intervals 18th June 2005 25th October 2016 used station. provided Level local datum stations. Trend assessing SPSS 16.0 package software....
Günümüzde GPS ile türetilen elipsoidal yükseklikler, gerçek zemin durumunu yansıtmadıkları için, yüksekliklerle alakalı hassas pratik ihtiyaçları karşılamaktan uzaktırlar. Ortometrik yerin fiziki durumuyla daha uyumludur. Bu sebeple elipsoid yüksekliklerinden ortometrik yüksekliklere dönüşümünde kullanılacak en iyi jeoid modelinin belirlenmesi çok önemlidir. Jeoid modellerinin ise farklı matematiksel parametreleri olan çeşitli entepolasyon teknikleri gerçekleştirilebilir. Enterpolasyon...
Abstract ED50 datum uses Hayford ellipsoid and Greenwich meridian as the prime meridian. In Turkey, ED-50 using was used until 2001, ITRF GRS80 after 2001. order to use coordinate systems in different datums, must be associated transformed each other. this study, 2D transformation parameters from ITRF-96 have been determined. For transformation, common points both selected Maçka Ortahisar districts of Trabzon province. The two-dimensional similarity (Helmert) Affine methods applied through...
Background: In dentistry, needles are the most feared and anxiety-causing tool, making anesthetic injection a worrying practice for patients. Aim: To evaluate effect of intraosseous anesthesia (IOA) needle-free dental (NFA) on pain levels in systemically healthy 8–10-year-old Patients Methods: Twenty patients aged 8–10 years were included this cross-over study. Specifically, was measured by Wong Baker, pulse rate (PR), salivary opiorphin (SOL). addition, Frankl Behavioral scale used to...
In this study, the causes and size of discrepancies between various geoid models were investigated. Local (Turkish Geoid-1991, Turkish GPS/Leveling Geoid, Updated Geoid-1999, Geoid-2003, Hybrid Geoid Model-2009) global (EIGEN-GL04C, EIGEN-GL04S1, EIGEN-5C) used in Turkey. Thirty different points selected The heights calculated. These compared terms criteria based on their developments height differences calculated using these at test points. from some observed among models. reasons behind...
Nowadays, with the rapid development of technology, importance deformation measurement is increasing. Measuring shape and position changes natural or artificial structures as a result external factors are called measurements. In order to determine deformations, geodetic control networks generally established measurements made at various periods in these networks. Deformation analysis performed using point coordinates obtained by evaluating made. GPS used for horizontal vertical directions...
Doğal veya yapay yapıların dış etkenler sonucunda şekil ve konum değişikliğini ölçme işlemlerine deformasyon ölçmeleri denir. Deformasyonların belirlenmesi amacıyla jeodezik kontrol ağları kurulmakta bu ağlarda farklı periyotlarda yapılan ölçülerin değerlendirilmesiyle analizi gerçekleştirilmektedir. Jeodezik ağlarında belirlenmesinde yatay düşey doğrultu için genellikle GNSS, yalnızca hassas nivelman yöntemiyle ölçüler kullanılır. Kıyılardaki uzun dönemli deniz seviyesi değişimleri...