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Video sensors are becoming ubiquitous and the volume of captured video material is very large. Therefore, tools for searching video databases are indispensable. Current techniques that extract features purely based on the visual signals of a video are struggling to achieve good results. By considering video related meta-information, more relevant and(More)
The past decade has witnessed a proliferation of repositories that store and retrieve continuous media data types, e.g., audio and video objects. These repositories are expected to play a major role in several emerging applications, e.g., library information systems, educational applications, entertainment industry, etc. To support the display of a video(More)
Video servers are expected to play an important role in a number of application domains e g library information systems entertainment industry scienti c applications etc A challenging task when implementing these systems is to ensure a continuous display of audio and video objects If special precautions are not taken the display of an object may su er from(More)
Magnetic disks have established themselves as the mass storage device of choice for data inten sive applications including video servers These devices are mechanical in nature They perform useful work when transfering data and wasteful work when preparing to transfer data For video servers a disk can support a higher number of simultaneous displays when its(More)
The rapid adoption and deployment of ubiquitous video cameras has led to the collection of voluminous amounts of media data. However, indexing and searching of large video databases remain a very challenging task. Recently, some recorded video data are automatically annotated with meta-data collected from various sensors such as Global Positioning System(More)
N-doped porous carbon produced via chemical activation of polypyrrole functionalized graphene sheets shows selective adsorption of CO(2) (4.3 mmol g(-1)) over N(2) (0.27 mmol g(-1)) at 298 K. The potential for large scale production and facile regeneration makes this material useful for industrial applications.
For applications with large data sets, e.g., video servers, magnetic disks have established themselves as the mass storage device of choice. A technique to increase the storage capacity of disks is zoning. A side-eeect of zoning is that it introduces a disk drive with variable transfer rates. This chapter describes techniques to support a continuous display(More)
Video tag annotations have become a useful and powerful feature to facilitate video search in many social media and web applications. The majority of tags assigned to videos are supplied by users - a task which is time consuming and may result in annotations that are subjective and lack precision. A number of studies have utilized content-based extraction(More)
MediaQ is a novel online media management system to collect, organize, share, and search mobile multimedia contents using automatically tagged geospatial metadata. User-generated-videos can be uploaded to the MediaQ from users' smartphones, iPhone and Android, and displayed accurately on a map interface according to their automatically sensed geospatial and(More)
In a scalable server that supports the retrieval and display of continuous media audio and video clips both the number of simultaneous displays and the expected startup latency of a dis play increases as a function of additional disk bandwidth This paper describes object replication and request migration as two alternative techniques to minimize startup(More)