Bor, Ali Şakir


Robust Kalman filtering for small satellite attitude estimation in the presence of measurement faults
Söken, Halil Ersin; Sakai, Shin-ichiro (Elsevier BV, 2014-03-01)
In normal working conditions it is possible to achieve sufficient attitude estimation accuracy for a satellite using regular Kalman filter algorithm. On the other hand, when there is a fault in the measurements, the Kalman filter fails in providing the required accuracy and may even collapse over time. In this paper, a Robust Kalman filtering method is proposed for the attitude estimation problem. By using the proposed method both the Extended Kalman Filter and Unscented Kalman Filter are modified and the n...
Finite strip with a central crack under tension
Yetmez, M; Gecit, MR (Elsevier BV, 2005-03-01)
In this study, a symmetrical finite strip with a length of 2L and a width of 2h, containing a transverse symmetrical crack of width 2a at the midplane is considered. Two rigid plates are bonded to the ends of the strip through which uniformly distributed axial tensile load of magnitude 2hp(0) is applied. The material of the strip is assumed to be linearly elastic and isotropic. Both edges of the strip are free of stresses. Solution for this finite strip problem is obtained by means of an infinite strip of w...
A Pulse Voltage Application in Electrochemical Reduction of Solid CaWO4 Powder
Goksu, Orhan Gokce; ERDOĞAN, METEHAN; Karakaya, İshak (The Electrochemical Society, 2016-09-01)
Scheelite is the most abundant mineral of tungsten, but wolframite is used more than scheelite due to easier dissolution in alkaline solutions used in present processing methods. An alternative method based on electrochemical reduction of CaWO4 by direct current applications in molten salt solutions was recently reported. Pulse voltage and constant voltage reduction mechanisms were compared and an optimization of reduction kinetics was achieved in this study. The results have shown that faster reduction rat...
Optimization of well placement in complex carbonate reservoirs using artifical intelligence
Uraz, İrtek; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2004)
This thesis proposes a framework for determining the optimum location of an injection well by using an inference method, Artificial Neural Networks and a search algorithm to create a search space and locate the global maxima. Theoretical foundation of the proposed framework is followed by description of the field for case study. A complex carbonate reservoir, having a recorded geothermal production history is used to evaluate the proposed framework ( Kizildere Geothermal field, Turkey). In the proposed fram...
Determination of Internal Stress of Ni Electroplated Samples in Sulphamate Solutions
Aykac, B.; Erdogan, M.; Karakaya, İshak (2017-06-01)
Internal stress is a common problem affecting the functionality of the electroplated materials. The parameters of electrodeposition and additive materials that are soluble in the bath change the characteristics of the plating and affect the internal stress of the coatings. The influence of the electrodeposition parameters on the internal stress of Ni deposits from the nickel sulphamate baths were studied by the help of fractional factorial design. The parameters included temperature, pH, current density and...
Citation Formats
A. Ş. Bor, “HIGH-TEMPERATURE TENSILE DEFORMATION OF A NITRIDED FE-1-PERCENT V-ALLOY,” SCRIPTA METALLURGICA ET MATERIALIA, pp. 601–604, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52357.