[Show abstract][Hide abstract] ABSTRACT: Advancements in heterogeneous and pervasive computing introduce many dynamic features that require applications to be adaptive. To become adaptive, an application first needs to be aware of its computing environment characteristics (awareness) as well as its peer's awareness. The paper presents flexible awareness measurement and management architectures for adaptive applications in a pervasive computing environment. We investigate how our system can be beneficial to adaptive applications by providing an integrated interface (adding, deleting, and querying) to different types of awareness, measurement extensibility, and application controlled measurement behaviors. To manage awareness efficiently, we then discuss a pull/pull method, and flexible consistency management. A hybrid architecture is used to distribute awareness efficiently for both wired and wireless networks.
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE; 01/2009
[Show abstract][Hide abstract] ABSTRACT: Cerebral angiography (CA) is increasingly used in clinical practice with advances in neurointerventional therapy. We present our CA experience performed by neurologists at an academic institution.
CA performed between July 2005 and March 2008 was reviewed. Major neurological outcome was defined as a new neurological deficit lasting >24 hours or worsening of pre-existing neurological deficit by 4 points on the National Institutes of Health Stroke Scale. Major non-neurological outcomes were defined as any death within 24 hours of the procedure, vascular injury requiring surgery, arteriovenous fistula, or pseudo-aneurysm formation and access site hematoma >5 cm, and/or requiring blood transfusion.
In total 661 angiograms were performed over 30 months. CA indications were ischemic stroke in 210/661 (31.7%), hemorrhagic stroke in 321/661 (48.6%), trauma for 16/661 (2.4%), presurgical epilepsy workup 95/661 (14.3%), and other conditions 19/661 (2.9%). Mean age of the group was 49 +/- 18 years. Permanent neurological deficit occurred in .2% (1 patient) and reversible neurological deficits occurred in .2% (1/661). Major non-neurological complications occurred in .9% (6/661). All these rates were less than established guidelines.
The safety and efficacy of CA performed by interventional neurologists is acceptable by current guidelines.
Journal of neuroimaging: official journal of the American Society of Neuroimaging 03/2009; 20(3):251-4. DOI:10.1111/j.1552-6569.2008.00356.x · 1.73 Impact Factor
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