purpose : to determine cyclotorsional eye movement between the upright position and the supine position, in iranian patients with high preoperative astigmatism methods : this prospective cross sectional study contains 102 eyes of 59 patients who were candidates for refractive surgery with technolas 217z100 excimer laser system for correction of high astigmatism. wavefront measurements using zyw...

We have examined the effects of parasite infection on the mucosal architecture of mice maintained on an elemental diet (Vivonex). Techniques used were conventional histology, micro-dissection and measurement of individual villi and crypts, and measurement of crypt cell proliferation rate by a metaphase accumulation technique. In normal, non-parasitised mice the elemental diet caused no change i...

The effects of the carcinogen, 1,2-dimethylhydrazine (DMH), on the proliferative characteristics of the crypt cell population of mouse colon were studied. DMH (20 mg/kg body weight) was injected s.c., weekly, for 2, 8, 16, 20, or 26 weeks. At the end of each treatment period, a group of animals was injected with [3H]thymidine and killed. After 2 weeks of DMH treatment, the crypts appeared norma...

Immune reconstitution inflammatory syndrome (IRIS) is a common and potentially serious complication occurring in HIV-infected patients being treated for tuberculosis (TB) using combined antiretroviral treatment. A role of adaptive immunity has been suggested in the onset of IRIS, whereas the role of natural killer (NK) cells has not yet been explored. The present study sought to examine the inv...

In this paper, we propose a transformation function for a user’s raw iris data, an “iris code” in iris scanning verification on the server, since the iris code requires to be hidden from even a server administrator. We then show that the user can be properly authenticated on the server, even though the iris code is transformed by the proposed function. The reason is that the function has a char...

BACKGROUND Here, we aimed to determine the clinical spectrum, predictors and outcomes of paradoxical tuberculosis-immune reconstitution inflammatory syndrome (TB-IRIS) in a resource-limited setting. METHODS In a prospective cohort, we studied 254 patients with tuberculosis and HIV coinfection commencing antiretroviral therapy (ART). We identified patients with TB-IRIS using the International ...

Iris liveness detection is an important module in an iris recognition system to reduce the risks of being spoofed by fake iris patterns at the sensor input. A general framework is proposed to detect multiple types of fake iris images based on texture analysis. A novel iris pattern representation method namely hierarchical visual codebook (HVC) is proposed to encode the distinctive and robust te...

The randomness of iris pattern makes it one of the most reliable biometric traits. On the other hand, the complex iris image structure and various sources of intra-class variations result in the difficulty of iris representation. Although diverse iris recognition methods have been proposed, the fundamentals of iris recognition have not a unified answer. As a breakthrough of this problem, we fou...

Crypt cell production rate (CCPR) has been measured by a stathmokinetic technique in the relapse and remission phases of ulcerative proctocolitis. Rectal biopsies were obtained from eight patients with colitis in relapse, 14 patients with colitis in remission, and 14 patients with histologically normal mucosa. Biopsies were maintained in organ culture for 16 hours and were then exposed to vincr...

purpose: to present a new reliable and accurate iris recognition method applicable in identification systems. methods: the system was implemented and tested on 876 standard iris images (daugman iris images database) from 876 persons of different nationalities via image processing techniques. results: false accept reject (far) and false reject reject (frr) were smaller in our suggested method as...