Four methods for the simulation of the Wiener process with constant drift and variance are described. These four methods are (1) approximating the diffusion process by a random walk with very small time steps; (2) drawing directly from the joint density of responses and reaction time by means of a (possibly) repeated application of a rejection algorithm; (3) using a discrete approximation to th...

background: kidney transplantation is a preferred treatment for many patients with end-stage renal disease (esrd) and is far more profi table than hemodialysis. analyzing renal transplantation data can help to evaluate the eff ectiveness of transplantation interventions. the aim of this study was to determine the organ survival rate after kidney transplantation during a period of 10 years (marc...

L IVER allograft rejection is diagnosed largely base.d on liver function tests indicating graft damage associated with rejection. but histopathological diagnosis using biopsy is still necessarv. Since it can be difficult to distinguish rejection from ~ther causes of graft damage in the absence of liver histopathology. detection of a marker for immune activation and a mediator of inflammation co...

Kidney transplantation is a method of choice as a treatment for end-stage renal disease in indicated cases. However, the long graft survival represents only about 50% due to various types of rejection as a leading cause of graft loss in renal transplant recipients. The early dg. of rejection and especially acute rejection, it's adequate management, decreased risk for the future chronic rejectio...

Two reject mechanisms are compared using a massively parallel character recognition system implemented at NIST. The recognition system was designed to study the feasibility of automatically recognizing hand-printed text in a loosely constrained environment. The first method is a simple scalar threshold on the output activation of the winning neurode from the character classifier network. The se...

Early wound excision and grafting of burn wounds is regarded not only as the method of choice in speeding up the healing process in deep burns, but also limits contracture and infection, On the other hand, smoking has generally been implicated in the delay of the healing process in a variety of surgical procedures, In this study we report the outcome of a cross-sectional study of all the 39...

Detection of acute rejection is based on the identification of infiltration and cellular damage in myocardial biopsies sequentially performed after heart transplantation. Grading of rejection uses the criteria of the International Society of Heart and Lung Transplantation (ISHLT) classification. This provides a consensus framework for reporting results and for treatment of acute rejection based...

BACKGROUND Mice with abdominal heterotopic heart transplants were studied to determine whether scintigraphic detection of an increase in major histocompatibility complex (MHC) class II antigen expression could be used as a noninvasive method for diagnosing early rejection. METHODS AND RESULTS Allografts from C3H/He (H2k) donors were transplanted into BALB/c (H2d) recipients (n = 18). Two of t...

Recording scalp electroencephalography (EEG) during human motion can introduce motion artifacts. Repetitive head movements can generate artifact patterns across scalp EEG sensors. There are many methods for identifying and rejecting bad channels and independent components from EEG datasets, but there is a lack of methods dedicated to evaluate specific intra-channel amplitude patterns for identi...

Doppler ultrasound is widely used diagnostic tool for measuring and detecting blood flow. To get a Doppler ultrasound spectrum image with a good quality, the clutter signals generated from stationary and slowly moving tissue must be removed completely. Without enough clutter rejection, low velocity blood flow cannot be measured, and estimates of higher velocities will have a large bias. In most...