Status of this Memo This memo defines an Experimental Protocol for the Internet community. It does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited.

Increasing need for people to be "connected";

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The increasing ease of self-expression and webpublishing has resulted in an explosion in the amount of content being generated in the current Internet. Besides traditional sources such as news portals, regular users are documenting their lives and thoughts and other people are subscribing, downloading and viewing this content. A lot of content therefore is being generated at the edge and consumed by the edge.Traditional client-server architectures are known to be ineffective in handling large correlated bursts of user demands. However, with RSS becoming more popular, such flash crowd scenarios will be more and more commonplace due to automated polling and downloads. Peer to peer protocols such as BitTorrent provide an attractive solution for such scenarios. BitTorrent networks are scalable, and the expected download time is independent of the arrival rate of peers (content consumers). However, the base performance of a BitTorrent network may not be fast enough from a user or content publisher's perspective. Besides, BitTorrent gives poor results towards the end of a flash crowd when most of the large burst of arrivals have downloaded and left, and there are not too many peers online.We motivate the need for a content delivery network with well connected servers to participate in BitTorrent delivery streams. The servers are dynamically added and function as cushions to handle increase in demand as well as bolster a delivery stream when there is a paucity of users. We analytically model the approach and determine the average download time both in steady state and in the transient state. Our analysis shows that a content delivery provider can provision the deployment of servers on-the-fly based on the arrival rate of peers to provide a certain pre-agreed average download time.

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ObjectiveThe widespread adoption of endovascular therapy (EVT) for emergent large vessel occlusion has led to increased nationwide demand for neuro-interventionalists, heightened interest among Neurology residents to pursue neuro-intervention (NI) as a career, and increased importance of NI exposure for all Neurologists who care for patients with AIS. Currently, exposure to NI and its career path are not well-defined for Neurology trainees.MethodsThe Society for Vascular and Interventional Neurology (SVIN) Education Committee conducted a multi-center electronic survey directed towards Neurology residents, Vascular Neurology (VN), Neuro-critical care (NCC) and NI fellows in June 2018. Two hundred fifty programs were invited to participate; 76 trainees completed the survey.ResultsRespondents self-identified as 22% postgraduate year (PGY)-2, 40% PGY-3/4, 30% VN fellows, and 8% NI or NCC fellows. Eighty-seven percent of trainees had greater than 2 months exposure to VN during residency, 41% to NCC and only 3% to NI. Sixty-eight percent of respondents had no exposure to NI during residency. While 72% felt that a background in Neurology was good preparation for NI, only 41% agreed that fellowship training pathway in NI is well structured for Neurology residents when compared to other sub-specialties.ConclusionIn this survey, respondents identified lack of exposure to NI and a well-defined training pathway as obstacles towards pursuing NI as a career. These obstacles must be addressed for the continued development of NI as a sub-specialty of Neurology.

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