Algorithms for advance bandwidth reservation in media production networks

Media production generally requires many geographically distributed actors (e.g., production houses, broadcasters, advertisers) to exchange huge amounts of raw video and audio data. Traditional distribution techniques, such as dedicated point-to-point optical links, are highly inefficient in terms of installation time and cost. To improve efficiency, shared media production networks that connect all involved actors over a large geographical area, are currently being deployed. The traffic in such networks is often predictable, as the timing and bandwidth requirements of data transfers are generally known hours or even days in advance. As such, the use of advance bandwidth reservation (AR) can greatly increase resource utilization and cost efficiency. In this paper, we propose an Integer Linear Programming formulation of the bandwidth scheduling problem, which takes into account the specific characteristics of media production networks, is presented. Two novel optimization algorithms based on this model are thoroughly evaluated and compared by means of in-depth simulation results

Measuring the effects of mobile technology barriers and enablers on acceptance and proficiency in the Nigerian construction industry

The impact of mobile technology (MT) barriers and enablers on MT acceptance and proficiency is poorly understood on construction sites in Nigeria. As a result, this article investigated MT acceptance and proficiency levels, as well as MT barriers and enablers, to find out how they affect MT acceptance and proficiency. The research employs a quantitative research design with a structured questionnaire survey. Mean score analysis, exploratory factor analysis (EFA), and paired two sample t-test were among the statistical analyses performed. The research centred on construction site managers in Lagos State, Nigeria. The barriers and enablers of MT have a significant impact on MT acceptance and proficiency. Mobile devices, mobile apps, site documentation, site organisation, and site communication all benefit significantly from task smoothening. Complicated interfaces have a strong effect on site documentation; security concerns have a high impact on mobile devices and site communication, and network outages have a greater impact on mobile services, mobile apps, site documentation, site programming, and site administration. The study suggests that the academic programme be updated, in order to produce digitally compliant future construction professionals and accelerate the advancement of MT-based innovative solutions in the Nigerian construction industry

ATLAS: A flexible and extensible architecture for linguistic annotation

We describe a formal model for annotating linguistic artifacts, from which we derive an application programming interface (API) to a suite of tools for manipulating these annotations. The abstract logical model provides for a range of storage formats and promotes the reuse of tools that interact through this API. We focus first on ``Annotation Graphs,'' a graph model for annotations on linear signals (such as text and speech) indexed by intervals, for which efficient database storage and querying techniques are applicable. We note how a wide range of existing annotated corpora can be mapped to this annotation graph model. This model is then generalized to encompass a wider variety of linguistic ``signals,'' including both naturally occuring phenomena (as recorded in images, video, multi-modal interactions, etc.), as well as the derived resources that are increasingly important to the engineering of natural language processing systems (such as word lists, dictionaries, aligned bilingual corpora, etc.). We conclude with a review of the current efforts towards implementing key pieces of this architecture.Comment: 8 pages, 9 figure

CHORUS Deliverable 2.1: State of the Art on Multimedia Search Engines

Based on the information provided by European projects and national initiatives related to multimedia search as well as domains experts that participated in the CHORUS Think-thanks and workshops, this document reports on the state of the art related to multimedia content search from, a technical, and socio-economic perspective. The technical perspective includes an up to date view on content based indexing and retrieval technologies, multimedia search in the context of mobile devices and peer-to-peer networks, and an overview of current evaluation and benchmark inititiatives to measure the performance of multimedia search engines. From a socio-economic perspective we inventorize the impact and legal consequences of these technical advances and point out future directions of research

Recent Geotechnical Developments in Geospatial Information Systems Technology

Geotechnical engineering projects in current research and practice are increasingly undergoing geospatial analysis based on geologic and geotechnical data collected. The explosion of spatial data that is available for surface features, particularly from the raster based products, heavily used by commercial and available to the public, present only one dimension of site characterization. Geotechnical engineers are more interested in data with depth immediately below their project site retrieve from drilled and imaged subsurface surveys. The ability to optimize the use of new and existing subsurface data continues to be undermined by the lack of a common and agreed data format and structure. Over the past decade several initiatives have tried to develop some consensus, with limited success. The latest initiative for a common geotechnical data exchange standard is also described. Several projects based on the authors, experience are featured in this paper and serve as examples of the challenge of working with large and diverse subsurface geotechnical databases. Additionally, an update of a geotechnical data exchange format is also presented to point the direction for the future