Introduction Non-contrast-enhanced assessment of the pulmonary function remains a challenge in the developement of suitable MR techniques. Recently a Fourier Decomposition (FD) MRI was proposed to obtain regional lung perfusion and ventilation-related information during a single acquisition series [1, 2]. The method utilizes rapid acquisition of time-resolved MR-data using a Steady-State Free P...

statement of problem: it is yet unclear whether fiber-reinforced composite posts can enhance the mechanical properties and prevent vertical fractures of teeth under chewing loads. purpose: the purpose of this study was to compare the fracture resistance and failure mode of endodontically treated teeth restored with three different post systems. materials and methods: thirty-six maxillary canine...

This paper describes the simple method of post processing for hearing impaired integrate into standard digital audio decoder such as AAC, AC3 or other codecs based on time/frequency transform. The results of evaluation, employing emulated hearing impairment, will be shown.

We deal with a class of one-parameter family integral transforms Bargmann type arising as dual transform fractional Hankel transform. Their ranges are identified to be special subspaces of...

this paper presents a new coding method for image compression based on jpeg2000 and contourlet transform. jpeg2000 standard is a common standard that uses discrete wavelet transform (dwt) in the compression process. the main problems of dwt are failure to detect curved edges in image and its shortage representation of the ridge and furrow patterns which cause deficiency and block artifacts rema...

visual servoing is generally contained of control and feature tracking. study of previous methods shows that no attempt has been made to optimize these two parts together. in kernel based visual servoing method, the main objective is to combine and optimize these two parts together and to make an entire control loop. this main target is accomplished by using lyapanov theory. a lyapanov candidat...

introduction: an efficient method of tomographic imaging in nuclear medicine is positron emission tomography (pet). compared to spect, pet has the advantages of higher levels of sensitivity, spatial resolution and more accurate quantification. however, high noise levels in the image limit its diagnostic utility. noise removal in nuclear medicine is traditionally based on fourier decomposition o...

there are two methods for identifying formation interface in oil wells: core analysis, which is a precise approach but costly and time consuming, and well logs analysis, which petrophysists perform, which is subjective and not completely reliable. in this paper, a novel coupled method was proposed to detect the formation interfaces using gr logs. second approximation level (a2) of gr log gained...