Anand Murugappan

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BACKGROUND Previous studies have shown that neurologic complications following carotid endarterectomy (CE) are underestimated if patients are not examined by neurologists after surgery. OBJECTIVE To review the morbidity and mortality in a cohort of patients examined before and after CE in a neurology and stroke clinic. METHODS This was a prospective(More)
The authors report eight pregnant women with acute ischemic stroke treated with thrombolysis (rt-PA [recombinant human tissue plasminogen activator] or urokinase). Seven women recovered. Two extracranial and two asymptomatic intracranial hemorrhages complicated treatment; one woman died of arterial dissection complicating angiography. Three patients had(More)
Many on a daily basis use time based alarms. Spatial alarms extend the very same idea to location-based triggers, which are fired whenever a mobile user enters the spatial region of the location alarms. Spatial alarms provide critical capabilities for many mobile location based applications ranging from personal assistants , inventory tracking to industrial(More)
Time based alarms are used by many on a daily basis. Spatial alarms extend the very same idea to location based triggers, which are fired whenever a mobile user enters the spatial region of the location alarms. Spatial alarms provide critical capabilities for many mobile location based applications ranging from personal assistants, inventory tracking to(More)
Naive B or B+ trees are very good and efficient for indexing single dimensional data but not well suited for multidimensional data. Antonin Guttman of University of California, Berkeley proposed a novel scheme for indexing multidimensional data called R Trees. Since then several variants of the R tree have been developed for for different situations and(More)
Caching in mobile systems is very important due to the fact that mobile devices are low on resources and bandwidth. Having a high cache hit rate would mean faster response, lesser messages to the server and hence lesser consumption of energy as well as lesser load on the server. Mobile cache replacement algorithms are different compared to web caching.(More)
This paper proposes an adaptive spatio-temporal placement scheme for caching location dependent queries. The cache placement decision is made according to the potential cache benefit of the query results based on the spatio-temporal properties of query results and the movement patterns of the mobile client, aiming at increasing the cache hit ratio. We(More)
R Tree [1] is a popular spatial indexing data structure which has been widely used for indexing multidimensional static objects in fields like Geo Information Systems, VLSI design. However, to the best of our knowledge neither the original R Tree paper nor any of the related papers that followed have considered explicitly exploiting the presence of a cache(More)
In the present day world people frequently use what can be called temporal alarms i.e. time based alarms like 'Give me a wake up call at 8:00 AM tomorrow'. These temporal alarms can be set on a variety of devices like clocks, PCs, mobile devices etc. Among all these, mobile devices have this additional feature that they are carried along by the person i.e.(More)