A posterior epidural mass causing paraparesis in a 20-year-old healthy individual

We present a case of a posterior epidural abscess at the thoracic vertebral level causing paraparesia in a young, healthy individual with no otherwise predisposing factors, with normal laboratory findings, as diagnosed using fat-suppressed MR imaging. Spinal epidural abscess is a rare condition, encountered mostly in the midthoracic or lower lumbar vertebral levels of elderly patients, that has a high mortality and morbidity (18-31%) when diagnosis and treatment is delayed. It is rarely spontaneous and is usually accompanied by spinal osteomyelitis. Diagnosis is rather easy in cases of vertebral osteomyelitis or when classical clinical, laboratory and imaging findings are present. However, cases of spontaneous development, with no predisposing factors, and lack of abscess suggesting clinical and laboratory findings may be a diagnostic challenge. In such cases, other posterior epidural masses such as schwannoma, neurofibroma, meningioma and hematoma should be considered in the differential diagnosis. Both the clinician and the radiology physician should have a high suspicion of epidural abscesses, because their early diagnosis and treatment is important. In addition to routine MR images, fat-suppressed MR images prove helpful in the diagnosis of spontaneous epidural abscesses by showing the inflammatory changes in the paraspinal area

Studies on structural and magnetic properties of melt textured growth YBa(2)Cu(3)O(7-x) superconducting bulk materials

International Conference on Superconductivity and Magnetism (ICSM) -- AUG 25-29, 2008 -- Ankara Univ, Side, TURKEYWOS: 000298993000011In this study, production methods and the structural and magnetic properties of melt-textured growth of YBa(2)Cu(3)O(7-x) bulk superconductors are discussed. During the research; various temperatures for melt texturing are tried for the optimization of the production of bulk YBCO. With the help of AC magnetic susceptibility measurements, some insights for the produced samples are handed out including critical phase transition temperatures and the effects of crystal growth inside the YBCO samples. XRD measurements showed bigger and greater number of crystal growth in a correlation with the increasing temperature and the microphotographs of the samples verified successive growth of YBCO crystals inside the samples. Sharper phase transition is reached with the increasing texturing temperature. Top seeding for the selected crystal orientation has also been tried at the 1070 degrees C for the texturing temperature, but the resulting melt textured sample was not different with the only-textured sample in the means of magnetic properties. Optimization over the texturing temperature found out to be between 1070 degrees C and 1080 degrees C while this result only depends on magnetic and structural properties

Superconducting Properties of Melt-Textured Growth YBa2Cu3O7-x Materials with Y211 Addition

4th International Conference on Superconductivity and Magnetism -- APR 27-MAY 02, 2014 -- Kervansaray Lara Hotel & Convent Ctr, Antalya, TURKEYWOS: 000349350100050Effects of Y211 phase addition into YBa2Cu3 O7-x bulk superconductors were investigated in order to provide high-quality grain structure for yttrium barium copper oxide (YBCO) bulk material. Various molar amounts of Y211 were added into Y123, and it was expected to affect the formation of the grains and to increase the critical current density (J (c)) and onset transition temperature (T (c)) of YBCO. The samples were fabricated by using melt-textured growth (MTG) method and characterized in terms of AC magnetic susceptibility and superconducting quantum interference device (SQUID) magnetization measurements. A simple algorithm was used to calculate the critical current densities of the samples according to Bean's critical state model. According to addition of Y211 phases into pure Y123, bulk samples with different molar amounts showed that the highest critical temperature and critical current density were obtained with a molar amount of n = 0.125 Y211-added sample as 94 K and 126.000 A/cm (2), respectively, under the 1-T applied magnetic field at a temperature of 10 K

Analyzing and comparing the AES architectures for their power consumption

It has been a decade since the block cipher Rijndael-with some minor changes-takes the name AES (Advanced Encryption Standard) and becomes the new block cipher standard of US government. Over the passed years, through deeper analysis and conducted measurements, AES has gained significant confidence for its security. Meanwhile, the sophistication in its realizations has also evolved considerably; system designers are now able to choose a suitable AES architecture tailored for their area and performance needs. Couple of years ago, the wider technological trend has shifted towards the power aware system design, hence, low power AES architectures gain importance over area and performance oriented designs. In this study, we examine and employ the low power design techniques in reducing the power consumption. These efforts allow us to come up with a slightly different architecture for s-box module. As a result, the power consumptions of AES over the Field Programmable Gate Arrays (FPGAs) are reduced. All described work and respective measurements are carried on Xilinx FPGA families and possible comparisons are made with the existing literature

Absolute and geometric parameters of contact binary GW Cnc

We present the results of our investigation on the geometrical and physical parameters of the W UMa type binary system GW Cnc. We analyzed the photometric data obtained in 2010 and 2011 at Ankara University Observatory (AUO) and the spectroscopic data obtained in 2010 at TUBITAK National Observatory (TUG) by using the Wilson-Devinney (2013 revision) code to obtain the absolute and geometrical parameters. We derived masses and radii of the eclipsing system to be M-1 = 0.257 M-circle dot, M-2 = 0.971 M-circle dot, R-1 = 0.526 R-circle dot and R-2 = 0.961 R-circle dot with an orbital inclination i(degrees) = 83.38 +/- 0.25 and we determined the GW Cnc system to be a W-type W UMa over-contact binary with a mass ratio of q = 3.773 +/- 0.007. (C) 2015 Elsevier B.V. All rights reserved

The diffusion of nimesulide gel into synovial fluid: a comparison between administration routes

Background: Nimesulide is available in gel formulation and applied mainly for topical pain management. However, its passage to the synovial fluid is not yet clear. The aim of this study was to evaluate if topical administered nimesulide passes into the synovial fluid and to compare its concentration with the oral nimesulide administration regimen