Learn More
A detailed three-dimensional nonlinear finite element model of lumbar segment L3-L5 was developed to investigate the influence of vibration on the components of human spine. The results show that the vibration effects of different spinal components are not exactly the same, and the stress near the posterior region of L4-L5 annulus is higher than that of its(More)
Atypical teratoid/rhabdoid tumors (AT/RTs) are rare, highly malignant central nervous system tumors that predominantly occur in young children. A 22-year-old woman presented with a 4-year history of relapsing tinnitus and gradual hearing loss. Neuroimaging revealed an enhanced intrinsic left internal auditory canal mass. The patient underwent radiotherapy(More)
Sleep loss can alter extrinsic, task-related functional MRI signals involved in attention, memory, and executive function. However, the effects of sleep loss on brain structure have not been well characterized. Recent studies with patients with sleep disorders and animal models have demonstrated reduction of regional brain structure in the hippocampus and(More)
Ependymoma with cartilaginous metaplasia with or without bone formation is exceedingly rare. Only eight cases have been reported in the literature. We report a case of ependymoma with cartilaginous and osseous metaplasia in a 5-year-old boy. Microscopically, the tumor was composed of neoplastic ependymal tissue and mature cartilage and bone.(More)
Cyclooxygenase-2 (COX-2) and 5-lipoxygenase (5-LO) are important factors in tumorigenesis and malignant progression; however, studies of their roles in glioblastoma have produced conflicting results. To define the frequencies of COX-2 and 5-LO expression and their correlation with clinicopathological features and prognosis, tumor tissues from 76 cases of(More)
In this paper, a new blind symbol synchronization algorithm is presented for orthogonal frequency-division multiplexing (OFDM) systems. The proposed algorithm extracts the timing which is not disturbed by delay spread within the guard interval by utilizing the cyclic prefix. A new timing function is introduced. By detecting the down-turn transition timing(More)
To compare the bio-mechanical characteristics of cages of two types, i. e., polyetheretherketone/ hydroxyapatite/carbon fiber (PEEK/HA/CF) and titanium combined with internal pedicle screw fixation in lumbar model, and to provide experimental evidences for clinical application, we constructed a three-dimensional finite element model of an intact L2-L4(More)
  • 1