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In this paper, we explore the problem of supporting efficient access to social media contents on social network sites for mobile devices without requiring mobile users to be online all the time. We propose and implement a broker/proxy based architecture that stages data at a broker/proxy, and selectively downloads to the mobile device only those contents(More)
Wearable cameras are very useful for crowdsensing since they enhance the participation of crowds with less user interventions on manipulating cameras. However, stored videos are large and may fill up the storage space very soon, leading to dropped videos. In this paper, we propose Adaptive Transcoding Algorithm (ATA) to optimally transcode the stored videos(More)
Exposure to hydrogen peroxide induced considerable activation of phospholipase D (PLD) in rat pheochromocytoma PC12 cells. This PLD activation was potentiated by orthovanadate and okadaic acid, suggesting that tyrosine kinase and serine/threonine kinase are involved. Furthermore, H2O2-induced PLD activation was partially inhibited by either MEK1 inhibitor(More)
In this paper, we consider the problem of efficient social media access on mobile devices, and propose an Offline Online Social Media (O 2 SM) Middle-ware to: (i) rank the social media streams based the probability that a given user views a given content item, and (ii) invest the limited resources (network, energy, and storage) on prefetching only those(More)
The recent years have witnessed the wild success of social networks and social media sites such as Facebook, Twitter, LinkedIn, Google+, and Instagram -- indeed, many people rely on these social networks to communicate with their friends, family and community on a day to day basis. Via these sites, users exchange rich media contents, such as video, audio,(More)
We focus on the problem of efficient communications over access networks with asymmetric bandwidth and capability. We propose a resource-constrained asymmetric redundancy elimination algorithm (RCARE) to leverage downlink bandwidth and receiver capability to accelerate the uplink data transfer. RCARE can be deployed on a client or a proxy. Different from(More)
As the huge growth of mobile traffic amount, conventional Radio Access Networks (RANs) suffer from high capital and operating expenditures, especially when new cellular standards are deployed. Software, and cloud RANs have been proposed, but the stringent latency requirements e.g., 1 ms transmission time interval, dictated by cellular networks is difficult(More)
1. FUSION OF OPPORTUNISTIC TRANSMISSIONS People carry their mobile devices, such as smartphones and tablets, all the time, and generate tremendous amount of mobile video traffic. Per a Cisco report, mobile video represents 51% of mobile traffic in 2012, and mobile video users demand for short waiting time when clicking on a video. Unfortunately, network(More)
Toll-like receptors (TLRs) are involved in the progression of ischemic brain injury and hence vascular dementia; however, the underlying mechanisms are largely unknown. Here, we have investigated the interrelationship between stress-responsive heme oxygenase (HO)-1 isoenzyme and TLR4 during chronic brain hypoperfusion. The right unilateral common carotid(More)
We present a complete system, called Challenged Content Delivery Network (CCDN), to efficiently deliver multimedia content to mobile users who live in developing countries, rural areas, or over-populated cities with no or weak network infrastructure. These mobile users do not have always-on Internet access. We demo our CCDN, implemented on a Linux server,(More)