Matthew Sorell

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Motion vectors are used in digital video compression for the purpose of reducing file size, primarily by providing an estimate of a frame of interest as a motion-offset version of a reference frame or frames. Despite the name, a motion vector is not in and of itself a trace of object motion, but rather an index to a similar image block. The computational(More)
Wireless ad hoc networks provide a useful communications infrastructure for the mobile battlefield. In this paper we apply and develop passive radio frequency signal strength monitoring and packet transmission time profiling techniques, to characterise and reconstruct an encrypted wireless network’s topology. We show that by using signal strength(More)
A patient with severe combined immunodeficiency received seven transplants of bone marrow from an HLA-B-compatible and HLA-D-compatible unrelated donor in an attempt to provide immunologic reconstitution. The first four transplants achieved restricted engraftment with evidence of rudimentary immunologic function. A fifth transplant, given after low-dose(More)
Serial echocardiographic (ECHO) studies were obtained on 40 pediatric patients (pts) treated with greater than or equal to 80 mg/kg cyclophosphamide (CPM) (range 80-200 mg/kg) in 1 week. Patients were treated for solid tumors and prior to marrow transplant. Echo changes occurred in 10/13 pts who received CPM greater than or equal to 170 mg/kg over four(More)
Two children with the juvenile form of osteopetrosis were treated with marrow transplants from their HLA identical siblings. Following transplantation each child exhibited extensive bone reabsorption with a marked augmentation of osteoclastic function attributable to donor osteoclasts, including remodeling of bone with expansion of intramedullary(More)
Three hundred and fifty-two patients with alcoholic hepatitis were evaluated for protein-calorie malnutrition (PCM). In order to facilitate data analysis of nutritional status, a PCM score was calculated for each patient using eight nutritional parameters. The PCM score correlated significantly with mortality, clinical severity of the liver disease, and(More)
The concentration (activity) of ionized calcium in serum [Ca-++] was measured in nine patients with symptomatic hypocalcemia of diverse etiology. In all nine patients the [Ca-++] was smaller than or equal to 2.50 mg/dl. No significant correlation was found between the [Ca-++] and serum levels of either total calcium or phosphate. Use of the McLean-Hastings(More)
Phase I clinical studies of 4'-(9-acridinylamino)methanesulfon-m-anisidide (AMSA) using several dose schedules have shown acceptable toxicity and antitumor responses in acute leukemia and several carcinomas. Thirty-eight children with acute leukemia and non-Hodgkin's lymphoma were treated with AMSA in a total dose of 140 to 600 mg/sq m given as a daily i.v.(More)
Within the expanding paradigm of medical imaging and wireless communications there is increasing demand for transmitting diagnostic medical imagery over error-prone wireless communication channels such as those encountered in cellular phone technology. Medical images must be compressed with minimal file size to minimize transmission time and robustly coded(More)
Natural killer activity against herpes simplex virus type 1 infected fibroblasts NK(HSV-1) was studied prospectively in patients undergoing allogenic bone-marrow or fetal-tissue stem-cell transplantation. Thirteen patients showed evidence of engraftment and survived long enough to develop graft-versus-host disease (GvHD). Of this group, all of the seven(More)