108,087 research outputs found
Error resilience analysis of wireless image transmission using JPEG, JPEG 2000 and JPWL
The wireless extension of the JPEG 2000 standard formally known as JPWL is the newest international standard for still image compression. Different from all previous standards, this new standard was created specifically for wireless imaging applications. This paper examines the error resilience performance of the JPEG, JPEG 2000 and JPWL standards in combating multi-path and fading impairments in Rayleigh fading channels. Comprehensive objective and subjective results are presented in relation to the error resilience performance of these three standards under various conditions. The major findings in this paper reveal that a CRC approach is not a viable option for protecting wireless image data when not used in
conjunction with an efficient retransmission strategy. In addition, the Reed-Solomon error correction codes in JPWL provide strong protection for wireless image transmission. However, any stronger protection beyond RS(64,32) yields diminishing returns
Using computer simulation in operating room management: impacts of information quality on process performance
High quality information has a significant impact on improving operation performance and patient satisfaction, as well as resolving patient disputes. Based on the analysis of the perioperative process, information quality is considered as an important contributory factor in improving patient throughput. In this paper, we propose a conceptual framework to use computer simulations in modeling information flow of hospital process for operating room management (ORM). Additionally, we conduct simulation studies in different levels of the information quality for ORM. The results of our studies provide evidence that information quality can drive process performance in several phases of the ORM
Vision applications in agriculture
From early beginnings in work on the visual guidance of tractors, the National Centre for Engineering in Agriculture has built up a portfolio of projects in which
machine vision plays a prominent part. This presentation
traces the history of this research, including some highly
unusual topics
Automated soil hardness testing machine
This paper describes the design and performance of a mechatronic system for controlling a standard drop-hammer mechanism that is commonly used in performing outdoor soil or ground hardness tests. A low-cost microcontroller is used to control a hydraulic actuator to repeatedly lift and drop a standard free-falling weight that strikes a pipe (sampler) which is pushed deeper into the ground with each impact. The depth of the sampler pipe and position of the hydraulic cylinder are constantly monitored and the number of drops, soil penetration data and other variables are recorded in a database for future analysis. This device, known as the “EVH Trip Hammer”, allows the full automation and faster completion of what is typically a very labour-intensive and slow testing process that can involve human error and the risk of human injuries
The use of machine vision for assessment of fodder quality
At present fodder is assessed subjectively. The evaluation depends greatly on a personal opinion and there can be large variations in assessments. The project has investigated the use of machine vision in several ways,
to provide measures of fodder quality that will be ojective
and independent of the assessor. Growers will be able to
quote a quality measure that buyers can trust. The research
includes the possibility of discerning colour differences that are beyond the capability of the human eye, while still using equipment that is of relatively modest cost
Recommended from our members
“Please send us your money”: The BBC’s evolving relationship with charitable causes, fundraising and humanitarian appeals
Fundraising for charitable causes has had a key place in the BBC’s schedule since the earliest days of the corporation and the establishment of the weekly radio appeal. As new forms of fundraising through high-profile media events developed in the 1980s, raising unprecedentedly large sums for charity, the BBC had to adjust the way it negotiated with good causes and audiences. These changes coincided with professionalization and rapid growth of the NGO sector, which sought to elicit funds from a wider public using innovative techniques and new ways of reaching out through the media. This article uses internal BBC documents to examine how, against this rapidly changing background, the organization navigated the rules behind broadcasting of appeals. This includes the way that the BBC interacted with the Disasters Emergency Committee that had been established in the 1960s to provide an interface between broadcasters and charities to oversee exceptional fundraising for international causes. In some cases, the BBC faced difficulties in reconciling its duty to educate audiences about charitable causes with the fundraising imperative which relied on TV extravaganzas. In other cases, the BBC confronted the question of whether it was hosting a global fundraising event or simply covering an event organized by others. These kinds of emerging challenges which arose out of new innovations in fundraising via broadcasting produced interesting debates that are still evolving both within the charitable sector and in the way it relates to the media. The BBC’s role within this ecology provides some illuminating insights about the issues connected with raising funds for humanitarian causes
Saving Special Places: Community Funding for Land Conservation
In New Hampshire communities, there is a groundswell of interest and activity in conserving land. New Hampshire currently has more than forty-five land trusts. There are conservation commissions in all but a handful of towns. Many of them are engaged in conserving their special natural lands. Over half of the towns in the state have conservation funds fueled by the Land Use Change Tax. There have been 62 applications for land conservation projects to the Land and Community Heritage Investment Program since its inception in 2000. New Hampshire voters are appropriating significant taxpayer funds to conserve undeveloped land. Twelve communities, mostly in the south central and southeastern tier of the state, including Amherst, Brookline, Newfields, and Stratham, approved bonds and appropriations totaling nearly $20.2 million in 2002 alone. New Hampshire is losing 12,000 to 15,000 acres of open space a year to development. That is equivalent to building houses, roads and shopping areas in an area half the size of an average New Hampshire town. It is open space that gives our towns their traditional character and appearance. Unless towns protect open space strategically and intentionally, it will be consumed by development. The goal of this guidebook is to help you, as a concerned citizen, elected official, or conservation commission member, achieve your town’s land conservation goals by securing local funding for land conservation in your community
IWS briefing, Summer 2008 Volume 8 Issue 2
[Excerpt] A newsletter on workplace issues and research from the School of Industrial and Labor Relations at Cornell University
Bovine intelligence for training horses
A rail-mounted model of a small cow is to be used in the training of horses for camp-drafting contests. The paper concerns the addition of sensors and a strategy to enable the machine to respond to the proximity of the horse in a manner that will represent the behaviour of a live calf
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