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Sample records for ieee london uk

  1. AVSS 2007: IEEE International Conference onAdvanced Video and Signal based Surveillance, London, UK, September 2007

    DEFF Research Database (Denmark)

    Fihl, Preben

    This technical report will cover the participation in the IEEE International Conference on Advanced Video and Signal based Surveillance in September 2007. The report will give a concise description of the most relevant topics presented at the conference, focusing on the work related to the HERMES...

  2. Carbon dioxide and methane emission dynamics in central London (UK)

    Science.gov (United States)

    Helfter, Carole; Nemitz, Eiko; Barlow, Janet F.; Wood, Curtis R.

    2013-04-01

    London, with a population of 8.2 million, is the largest city in Europe. It is heavily built-up (typically 8% vegetation cover within the central boroughs) and boasts some of the busiest arteries in Europe despite efforts to reduce traffic in the city centre with the introduction of a congestion charging scheme in 2007. We report on two substantial pollution monitoring efforts in the heart of London between October 2006 and present. Fluxes of carbon dioxide (CO2) and water (H2O) were measured continuously by eddy-covariance in central London from October 2006 until May 2008 from a 190 m telecommunication tower (BT tower; 51° 31' 17.4'' N 0° 8' 20.04'' W). The eddy-covariance system consisted of a Gill R3-50 ultrasonic anemometer operated at 20 Hz and a LI-COR 6262 infrared gas analyser. Air was sampled 0.3 m below the sensor head of the ultrasonic anemometer - which was itself mounted on a 3 m mast to the top of a 15 m lattice tower situated on the roof of the tower (instrument head at 190 m above street level) - and pulled down 45 m of 12.7 mm OD Teflon tubing. In addition, meteorological variables (temperature, relative humidity, pressure, precipitation, wind speed and direction) were also measured with a multi-sensor (Weather Transmitter WXT510, Vaisala). Eddy-covariance measurements at the BT tower location were reinstated in July 2011 and include methane (CH4), CO2 and H2O concentrations measured by a Picarro fast methane analyser (G2301-f). CO2 emissions were found to be mainly controlled by fossil fuel combustion (e.g. traffic, commercial and domestic heating). Diurnal averages of CO2 fluxes were found to be highly correlated to traffic. However changes in heating-related natural gas consumption and, to a lesser extent, photosynthetic activity in two large city centre green spaces (Hyde Park and Regent's Park) explained the seasonal variability. Annual estimates of net exchange of CO2 obtained by eddy-covariance agreed well with up-scaled data from the UK

  3. London Calling Olympic spotlight will shine on U.K. consumer

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Come summer, the international spotlight will shine on the United Kingdom when the 2012 Olympics begin in London. While billions worldwide wilt be watching athletes striving to achieve their personal best, the coverage will also allow viewers to learn about the U.K. and its denizens. For apparel brands and retailers, it could offer a glimpse into possible new selling opportunities.

  4. Bullying, "Cussing" and "Mucking About": Complexities in Tackling Homophobia in Three Secondary Schools in South London, UK

    Science.gov (United States)

    Warwick, Ian; Aggleton, Peter

    2014-01-01

    In countries such as the UK, schools have a responsibility to prevent all forms of bullying, including those related to sexual orientation. However, relatively little is known about how schools go about this work successfully. This study aimed to identify how three secondary schools in south London, England, were addressing homophobia. Three…

  5. Sources of greenhouse gases and carbon monoxide in central London (UK)

    Science.gov (United States)

    Helfter, Carole; Tremper, Anja; Zazzeri, Giulia; Barlow, Janet F.; Nemitz, Eiko

    2015-04-01

    Biosphere-atmosphere exchange of carbon dioxide (CO2) has been on the scientific agenda for several decades and new technology now also allows for high-precision, continuous monitoring of fluxes of methane (CH4) and nitrous oxide (N2O). Compared to the natural environment, flux measurements in the urban environment, which is home to over 50% of the population globally, are still rare despite high densities of anthropogenic sources of pollutants. We report on over three years of measurements atop a 192 m tower in central London (UK), Europe's largest city, which started in October 2011. Fluxes of methane, carbon monoxide (CO) and carbon dioxide are measured by eddy-covariance (EC) at the British Telecom tower (51° 31' 17.4' N 0° 8' 20.04' W). In addition to the long-term measurements, EC fluxes of nitrous oxide (N2O) were measured in February 2014. All four trace gases exhibit diurnal trends consistent with anthropogenic activities with minimum emissions at night and early afternoon maxima. Segregating emissions by wind direction reveals heterogeneous source distributions with temporal patterns and source strengths that differ between compounds. The lowest emissions for CO, CO2 and CH4 were recorded for NW winds. The highest emissions of methane were in the SE sector, in the NE for CO2 and in the W for CO. Fluxes of all 3 gases exhibited marked seasonal trends characterised by a decrease in emissions in summer (63% reduction for CO, 36% for CO2 and 22% for CH4). Monthly fluxes of CO and CO2 were linearly correlated to air temperature (R2 = 0.7 and 0.59 respectively); a weaker dependence upon temperature was also observed for CH4 (R2 = 0.31). Diurnal and seasonal emissions of CO and CO2 are mainly controlled by local fossil fuel combustion and vehicle cold starts are thought to account for 20-30% of additional emissions of CO during the winter. Fugitive emissions of CH4 from the natural gas distribution network are thought to be substantial, which is consistent

  6. Pedestrian exposure to air pollution along a major road in Central London, UK

    Science.gov (United States)

    Kaur, S.; Nieuwenhuijsen, M. J.; Colvile, R. N.

    Pedestrian exposure to PM 2.5, the loss of reflectance ('blackness') of the PM 2.5 filters, ultrafine particle counts (particle range: 0.02-1 μm) and carbon monoxide (CO) was investigated along a major road running through the DAPPLE study site in Central London, UK. During an intensive 12-day exposure measurement campaign, groups of four volunteers sampled twice in the morning and twice in the afternoon along Marylebone Road. They were randomly designated a walking direction, walking position (kerbside or buildingside) and a side of the major road to walk along. PM 2.5 was sampled using high-flow gravimetric personal samplers, ultrafine particle counts were measured using TSI P-TRAKs and Langans were used to measure CO exposure. PM 2.5 samples were analysed gravimetrically and reflectance was measured using a smoke stain reflectometer to obtain a measure of 'black smoke'. In total 603 acceptable samples were obtained—155 PM 2.5 and reflectance, 120 ultrafine particle count and 173 CO. The average pedestrian exposure along the road was 37.7 μg/m 3, 12.1 m -1×10 -5, 80 009 pt/cm 3 and 1.3 ppm for PM 2.5, loss of reflectance, ultrafine particle counts and CO, respectively. PM 2.5 exposure in the morning was significantly higher than in the afternoon, and there was a significant difference in exposure on the different sides of the road. For both reflectance and ultrafine particle counts, the exposure was significantly different both between the two walking positions on the pavement and the two sides of the street canyon. However there was no significant difference in CO exposure based on walking position, walking direction, canyon side or timing. Filter reflectance was significantly but weakly correlated with PM 2.5 exposure ( r=0.3, N=155), CO exposure ( r=0.2, N=154) and ultrafine particle count exposure ( r=0.7, N=108). PM 2.5 and CO personal exposure measurements were much higher than those recorded at both the local background fixed monitoring station (FMS

  7. Receptor modelling of both particle composition and size distribution from a background site in London, UK

    Science.gov (United States)

    Beddows, D. C. S.; Harrison, R. M.; Green, D. C.; Fuller, G. W.

    2015-09-01

    Positive matrix factorisation (PMF) analysis was applied to PM10 chemical composition and particle number size distribution (NSD) data measured at an urban background site (North Kensington) in London, UK, for the whole of 2011 and 2012. The PMF analyses for these 2 years revealed six and four factors respectively which described seven sources or aerosol types. These included nucleation, traffic, urban background, secondary, fuel oil, marine and non-exhaust/crustal sources. Urban background, secondary and traffic sources were identified by both the chemical composition and particle NSD analysis, but a nucleation source was identified only from the particle NSD data set. Analysis of the PM10 chemical composition data set revealed fuel oil, marine, non-exhaust traffic/crustal sources which were not identified from the NSD data. The two methods appear to be complementary, as the analysis of the PM10 chemical composition data is able to distinguish components contributing largely to particle mass, whereas the number particle size distribution data set - although limited to detecting sources of particles below the diameter upper limit of the SMPS (604 nm) - is more effective for identifying components making an appreciable contribution to particle number. Analysis was also conducted on the combined chemical composition and NSD data set, revealing five factors representing urban background, nucleation, secondary, aged marine and traffic sources. However, the combined analysis appears not to offer any additional power to discriminate sources above that of the aggregate of the two separate PMF analyses. Day-of-the-week and month-of-the-year associations of the factors proved consistent with their assignment to source categories, and bivariate polar plots which examined the wind directional and wind speed association of the different factors also proved highly consistent with their inferred sources. Source attribution according to the air mass back trajectory showed, as

  8. Effects of the urban heat island on the phenology of Odonata in London, UK

    Science.gov (United States)

    Villalobos-Jiménez, Giovanna; Hassall, Christopher

    2017-02-01

    Urbanisation is one of the major drivers of ecosystem change and includes increased temperatures in cities leading to an urban heat island (UHI). This study quantified the phenological response of odonates across London, UK, from 1990 to 2012, using a database of 1,031,277 historical sightings. The ordinal flight dates of each species were used to calculate the leading edge, middle and trailing edge of the flight period (P5, P50 and P95, respectively). The results suggest that the phenology of odonates is affected by the UHI only at a community level: no significant changes in the P5 or P50 of the flight period were found, although the P95 shows a mean advance of 4.13 days compared to rural areas, thus suggesting a contraction of the flight period in urban areas. However, only one individual species (Sympetrum striolatum) exhibited an advance in the P95 of the flight period in urban areas compared to rural areas. On the other hand, climate change (minimum temperature) had a much stronger impact on the phenology of odonates at the community level with a significant advance of 6.9 days °C-1 in the P5 of the flight period, 3.1 days °C-1 in the P50 and 3.3 days °C-1 in the P95 flight date. Similarly, a significant advance in P5 was found in 7 of the 15 species tested in response to minimum temperature, and 2 species showed a significant advance in P50 in response to minimum temperature, but no species showed a shift in the P95 flight date due to minimum temperature. As shown in previous studies, life history influences the phenological response of odonates, with spring species and those species lacking an egg diapause being the most responsive to increased temperatures, although summer species and species with obligate egg diapause also respond to the UHI by advancing the P95 by 3.8 and 4.5 days, respectively, compared to rural areas, thus contracting the flight period. The present study shows that the UHI has negligible impacts on emergence patterns of odonates

  9. Regional methods for mapping major faults in areas of uniform low relief, as used in the London Basin, UK

    Science.gov (United States)

    Haslam, Richard; Aldiss, Donald

    2013-04-01

    Most of the London Basin, south-eastern UK, is underlain by the Palaeogene London Clay Formation, comprising a succession of rather uniform marine clay deposits up to 150 m thick, with widespread cover of Quaternary deposits and urban development. Therefore, in this area faults are difficult to delineate (or to detect) by conventional geological surveying methods in the field, and few are shown on the geological maps of the area. However, boreholes and excavations, especially those for civil engineering works, indicate that faults are probably widespread and numerous in the London area. A representative map of fault distribution and patterns of displacement is a pre-requisite for understanding the tectonic development of a region. Moreover, faulting is an important influence on the design and execution of civil engineering works, and on the hydrogeological characteristics of the ground. This paper reviews methods currently being used to map faults in the London Basin area. These are: the interpretation of persistent scatterer interferometry (PSI) data from time-series satellite-borne radar measurements; the interpretation of regional geophysical fields (Bouguer gravity anomaly and aeromagnetic), especially in combination with a digital elevation model; and the construction and interpretation of 3D geological models. Although these methods are generally not as accurate as large-scale geological field surveys, due to the availability of appropriate data in the London Basin they provide the means to recognise and delineate more faults, and with more confidence, than was possible using traditional geological mapping techniques. Together they reveal regional structures arising during Palaeogene crustal extension and subsidence in the North Sea, followed by inversion of a Mesozoic sedimentary basin in the south of the region, probably modified by strike-slip fault motion associated with the relative northward movement of the African Plate and the Alpine orogeny. This

  10. Bilingual Behaviour, Attitudes, Identity and Vitality: Some Data from Japanese Speakers in London, UK

    Science.gov (United States)

    Brown, Ivan; Sachdev, Itesh

    2009-01-01

    Although the Japanese community in London is relatively small, its composition is stable and reflects several aspects of Japan's relationship with the international community. Yet there appears to have been no systematic research exploring patterns of bilingual behaviour in relation to social psychological processes amongst Japanese nationals in…

  11. Application of MM5/CMAQ for modelling urban air pollution a case study for London, UK

    Science.gov (United States)

    Kitwiroon, N.; Fragkou, E.; Sokhi, R. S.; San Jose, R.; Pérez Camaño, J. L.; Middleton, D.

    2003-04-01

    Urban air pollution has been particularly studied for the last few decades because of its recognised environmental dangers and health implications. The complexity of the urban surface characteristics and turbulence patterns has dictated the use of numerical models by environmental research agencies and regulators in order to predict and manage urban air pollution. However, most of these models are not specifically adapted to urban applications and normally do not include detailed urban parameterisation, such as for surface roughness or urban heat fluxes. Flow structure and dispersion of air pollutants within cities, however, are influenced by urban features such as increased surface roughness. This paper presents a study using MM5 and CMAQ to assess the effect of urban boundary layer features on meteorological parameters, and hence London's air quality. MM5 is a non-hydrostatic (version 3), terrain-following sigma-coordinate model designed to simulate mesoscale and regional-scale atmospheric circulation. This paper employs an improved surface roughness treatment on meteorological profiles and pollution dispersion. A surface roughness scale has been developed for London and the surrounding region. The land cover data was derived from the Centre for Ecology and Hydrology (CEH) data, with a spatial resolution of 25 × 25 m. These z_o values are employed with MM5 for modelling meteorological parameters over London, covering an inner domain area of 49 × 49 km. The outputs of MM5 have been coupled to CMAQ photochemical model to predict concentrations of particles, NO_2 and O_3 for London and the surrounding regions at a spatial resolution of 1 × 1 km. The predicted concentrations have been compared with monitored data obtained from a range of national air quality monitoring sites including Central London (Bloomsbury, Brent), East London (Bexley) and West London (Hillingdon). Comparison of hourly model predictions with measured data is made for pollution levels for

  12. Biomarkers in Clinical Trials--SMi Conference. 23-24 September 2009, London, UK.

    Science.gov (United States)

    Walker, Glenda

    2009-11-01

    The Biomarkers in Clinical Trials conference, held in London, included topics covering new developments in the field of biomarkers. This conference report highlights selected presentations on the definition of biomarkers, the use of biomarkers to support decisions in drug development and to improve treatment outcomes, and the aims of the Biomarkers Consortium. A case study of the investigational drug selumetinib (AstraZeneca plc) is also discussed.

  13. Determinants of fine particle (PM{sub 2.5}) personal exposure levels in transport microenvironments, London, UK

    Energy Technology Data Exchange (ETDEWEB)

    Adams, H.S.; Nieuwenhuijsen, M.J.; Colville, R.N. [Imperial Coll. of Science, Technology and Medicine, TH Huxley School of Environment, Earth Sciences and Engineering, London (United Kingdom)

    2001-07-01

    A series of field studies were carried out in London, UK, during 1999-2000 in which over 400 fine particle (PM{sub 2.5}) personal exposure level measurements were taken for journeys in bicycle, bus, car and underground rail transport microenvironments. This was the first comprehensive PM{sub 2.5} personal exposure study of transport users. Both a fixed-route multi-transport mode study and a study of cyclists' commuter journeys were undertaken. Subsequent to these field studies regression modelling of possible influencing factors of these exposure levels was carried out. Meteorological variables, traffic density, mode and route were considered; the relationships of personal exposure levels with fixed site monitor (FSM) concentrations, and of the FSM concentrations with the potential predictor variables, were also investigated. This analysis of the determinants of transport user exposure to PM{sub 2.5} in London, UK, showed that wind speed had a significant influence on personal exposure levels, though explained only up to 20% of the variability of road transport user exposure levels. The occurrence of higher wind speeds was strongly associated with a decrease in personal exposure levels; a 1.5-2.0 fold difference in exposure level concentrations was estimated between the 10th and 90th percentiles of wind speed. Route was a significant factor, whilst mode was not a significant factor in the street microenvironment (between bicycle, bus and car modes); models incorporating route and mode, as well as wind speed, explained approximately 35% of the variability in PM{sub 2.5} exposure levels. Personal exposure levels were reasonably correlated with urban background FSM concentrations, for fixed-route road mode (bicycle, bus and car) exposure level concentrations, r=0.27 (p<0.01) and for commuter cyclists' exposure level concentrations r=0.58 (p<0.01). (Author)

  14. Spatial and temporal variability of urban fluxes of methane, carbon monoxide and carbon dioxide above London, UK

    Science.gov (United States)

    Helfter, Carole; Tremper, Anja H.; Halios, Christoforos H.; Kotthaus, Simone; Bjorkegren, Alex; Grimmond, C. Sue B.; Barlow, Janet F.; Nemitz, Eiko

    2016-08-01

    We report on more than 3 years of measurements of fluxes of methane (CH4), carbon monoxide (CO) and carbon dioxide (CO2) taken by eddy-covariance in central London, UK. Mean annual emissions of CO2 in the period 2012-2014 (39.1 ± 2.4 ktons km-2 yr-1) and CO (89 ± 16 tons km-2 yr-1) were consistent (within 1 and 5 % respectively) with values from the London Atmospheric Emissions Inventory, but measured CH4 emissions (72 ± 3 tons km-2 yr-1) were over two-fold larger than the inventory value. Seasonal variability was large for CO with a winter to summer reduction of 69 %, and monthly fluxes were strongly anti-correlated with mean air temperature. The winter increment in CO emissions was attributed mainly to vehicle cold starts and reduced fuel combustion efficiency. CO2 fluxes were 33 % higher in winter than in summer and anti-correlated with mean air temperature, albeit to a lesser extent than for CO. This was attributed to an increased demand for natural gas for heating during the winter. CH4 fluxes exhibited moderate seasonality (21 % larger in winter), and a spatially variable linear anti-correlation with air temperature. Differences in resident population within the flux footprint explained up to 90 % of the spatial variability of the annual CO2 fluxes and up to 99 % for CH4. Furthermore, we suggest that biogenic sources of CH4, such as wastewater, which is unaccounted for by the atmospheric emissions inventories, make a substantial contribution to the overall budget and that commuting dynamics in and out of central business districts could explain some of the spatial and temporal variability of CO2 and CH4 emissions. To our knowledge, this study is unique given the length of the data sets presented, especially for CO and CH4 fluxes. This study offers an independent assessment of "bottom-up" emissions inventories and demonstrates that the urban sources of CO and CO2 are well characterized in London. This is however not the case for CH4 emissions which are

  15. Complaints about dog faeces as a symbolic representation of incivility in London, UK: a qualitative study.

    Science.gov (United States)

    Derges, Jane; Lynch, Rebecca; Clow, Angela; Petticrew, Mark; Draper, Alizon

    2012-12-01

    During a 'Well London' study, residents were asked about their neighbourhood and its environment. Above all other complaints, 'dog poo' was mentioned as a key concern. Despite low rates of infection and disease among the human population resulting from contact with canine faecal matter, the concerns of the public continue to rate it as a serious public health issue. Most public health studies, therefore, seek to identify processes of transmission and disease pathology as a method of addressing the problem. This study approaches the issue through a contextualised analysis of residents' complaints, using anthropological theory to examine the symbolic representation of 'dog poo'. Analysis of the interviews shows that these specific complaints were located among less easily defined or articulated experiences of social and environmental neglect, where neighbours were estranged from one another and local authorities seen as negligent. This approach has important implications for public health, as it provides not only a strong indicator of the level of dissatisfaction within some of London's more disadvantaged neighbourhoods, but also identifies a need for policies that are grounded in cross-disciplinary research into the relationship between health, 'wellbeing' and experiences of marginalisation among urban populations.

  16. Environmental Risk Factors influencing Bicycle Theft: A Spatial Analysis in London, UK

    Science.gov (United States)

    Helbich, Marco

    2016-01-01

    Urban authorities are continuously drawing up policies to promote cycling among commuters. However, these initiatives are counterproductive for the targeted objectives because they increase opportunities for bicycle theft. This paper explores Inner London as a case study to address place-specific risk factors for bicycle theft at the street-segment level while controlling for seasonal variation. The presence of certain public amenities (e.g., bicycle stands, railway stations, pawnshops) was evaluated against locations of bicycle theft between 2013 and 2016 and risk effects were estimated using negative binomial regression models. Results showed that a greater level of risk stemmed from land-use facilities than from area-based socioeconomic status. The presence of facilities such as train stations, vacant houses, pawnbrokers and payday lenders increased bicycle theft, but no evidence was found that linked police stations with crime levels. The findings have significant implications for urban crime prevention with respect to non-residential land use. PMID:27643788

  17. Highlights from Faraday Discussion: Designing New Heterogeneous Catalysts, London, UK, April 2016.

    Science.gov (United States)

    Fischer, Nico; Manyar, Haresh G; Roldan, Alberto

    2016-06-28

    The Faraday Discussion on the design of new heterogeneous catalysts took place from 4-6 April 2016 in London, United Kingdom. It brought together world leading scientists actively involved in the synthesis, characterisation, modelling and testing of solid catalysts, attracting more than one hundred delegates from a broad spectrum of backgrounds and experience levels - academic and industrial researchers, experimentalists and theoreticians, and students. The meeting was a reflection of how big of an impact the ability to control and design catalysts with specific properties for particular processes can potentially have on the chemical industry, environment, economy and society as a whole. In the following, we give an overview of the topics covered during this meeting and briefly highlight the content of each presentation.

  18. Discovery of previously unrecognised local faults in London, UK, using detailed 3D geological modelling

    Science.gov (United States)

    Aldiss, Don; Haslam, Richard

    2013-04-01

    In parts of London, faulting introduces lateral heterogeneity to the local ground conditions, especially where construction works intercept the Palaeogene Lambeth Group. This brings difficulties to the compilation of a ground model that is fully consistent with the ground investigation data, and so to the design and construction of engineering works. However, because bedrock in the London area is rather uniform at outcrop, and is widely covered by Quaternary deposits, few faults are shown on the geological maps of the area. This paper discusses a successful resolution of this problem at a site in east central London, where tunnels for a new underground railway station are planned. A 3D geological model was used to provide an understanding of the local geological structure, in faulted Lambeth Group strata, that had not been possible by other commonly-used methods. This model includes seven previously unrecognised faults, with downthrows ranging from about 1 m to about 12 m. The model was constructed in the GSI3D geological modelling software using about 145 borehole records, including many legacy records, in an area of 850 m by 500 m. The basis of a GSI3D 3D geological model is a network of 2D cross-sections drawn by a geologist, generally connecting borehole positions (where the borehole records define the level of the geological units that are present), and outcrop and subcrop lines for those units (where shown by a geological map). When the lines tracing the base of each geological unit within the intersecting cross-sections are complete and mutually consistent, the software is used to generate TIN surfaces between those lines, so creating a 3D geological model. Even where a geological model is constructed as if no faults were present, changes in apparent dip between two data points within a single cross-section can indicate that a fault is present in that segment of the cross-section. If displacements of similar size with the same polarity are found in a series

  19. Fear of crime, mobility and mental health in inner-city London, UK.

    Science.gov (United States)

    Whitley, Rob; Prince, Martin

    2005-10-01

    This paper examines the relationship between fear of crime and mental health, and assesses the role interventions may have in helping overcome any negative impact arising from this fear. The data were gathered over a 2-year period in the Gospel Oak neighbourhood of North London using in-depth interviews, focus groups and participant observation. The data are analysed primarily by comparing the impact of fear of crime across sub-groups notably divided by gender, age and mental health status. It was found that fear of crime had a disproportionately negative impact on certain sub-groups, most notably low-income mothers, and to a lesser extent the mentally ill. They experienced what we term "time-space inequalities" as a consequence of fear of crime and other related factors. These inequalities describe variation in the ability to access and utilise different times and spaces within both the immediate and the wider environment. These have negative behavioural and affective consequences that appear to impact on overall mental health. They restrict spatial and temporal movement deterring protective social activity, health-promoting community involvement and use of services. Affective consequences include negative mood and low self-esteem. These inequalities were experienced less in other groups such as mentally healthy men or middle-income women. They appeared to be diminished by interventions that encourage spatial and temporal movement. These include comprehensive local transport, government-issued free travel passes for vulnerable populations and neighbourhood community safety measures such as the installation of CCTV. We suggest that experience of time-space inequalities may be damaging to mental health and that interventions which lessen them may help prevent, ameliorate or shorten episodes of mental illness.

  20. How and Why Do Smokers Start Using E-Cigarettes? Qualitative Study of Vapers in London, UK

    Directory of Open Access Journals (Sweden)

    Elle Wadsworth

    2016-06-01

    Full Text Available The aims of the study were to (1 describe how and why smokers start to vape and what products they use; (2 relate findings to the COM-B theory of behaviour change (three conditions are necessary for behaviour change (B: capability (C, opportunity (O, and motivation (M; and (3 to consider implications for e-cigarette policy research. Semi-structured interviews (n = 30 were conducted in London, UK, with smokers or ex-smokers who were currently using or had used e-cigarettes. E-cigarette initiation (behaviour was facilitated by: capability (physical capability to use an e-cigarette and psychological capability to understand that using e-cigarettes was less harmful than smoking; opportunity (physical opportunity to access e-cigarettes in shops, at a lower cost than cigarettes, and to vape in “smoke-free” environments, as well as social opportunity to vape with friends and family; and motivation (automatic motivation including curiosity, and reflective motivation, including self-conscious decision-making processes related to perceived health benefits. The application of the COM-B model identified multiple factors that may lead to e-cigarette initiation, including those that could be influenced by policy, such as price relative to cigarettes and use in smoke-free environments. The effects of these policies on initiation should be further investigated along with the possible moderating/mediating effects of social support.

  1. Liminal identities: Caribbean men who have sex with men in London, UK.

    Science.gov (United States)

    Anderson, Moji; Elam, Gillian; Gerver, Sarah; Solarin, Ijeoma; Fenton, Kevin; Easterbrook, Phillippa

    2009-04-01

    Accounts by 10 Caribbean men who have sex with men living in the UK reveal them to be liminal beings with unstable and unresolved identities. They are between social states: aware they are not heterosexual and not publicly recognised, or in some cases self-accepted, as homosexual. Caribbean-born respondents especially suffer from homophobia, expressing regret and disappointment at their sexuality. They may also experience cognitive dissonance - as they are aware of their conflict with the heteronormative order - they cannot resolve. Religion contributes to homophobia and cognitive dissonance particularly for Caribbean-born men, some of whom may believe a fundamental conflict exists between Christianity and homosexuality. Heterosexism and homophobia contribute to and reinforce their liminal state, by preventing transition to publicly recognised homosexual status. Respondents may engage in private and public, internal and external, overt and covert policing of their and other gay men's behaviour: through strategic pretence at heterosexuality and/or condemnation of men engaging in behaviour identifiable as stereotypically homosexual, for example. Narratives point to the need to complexify the conventional understanding of Jamaican heterosexism to explain reported variations in the degree of anti-homosexual hostility in the country.

  2. Methanotrophy in London, UK, Landfill Topsoil: Microbiology, Stable Carbon Isotopes, Seasonal Variation and Laboratory Model Study

    Science.gov (United States)

    Sriskantharajah, S.; Fisher, R.; Lowry, D.; Grassineau, N.; Nisbet, E. G.

    2004-12-01

    Landfill is a major source of methane emissions into the atmosphere. Aerobic soil is also a good sink of methane, as it is inhabited by methane consuming bacteria, methanotrophs. Methanotrophic bacteria were cultured from landfill soil samples. Three genera of methanotrophs were cultured: Methylocaldum, Methylosinus and Methylomonas. Interestingly, the only established members of the Methylocaldum genus are all thermophilic, whilst those isolated in this study are mesophilic. This suggests that those Methylocaldum methanotrophs found in landfills may have migrated from hot spring natural settings. Representatives of each genera were inoculated into a simple topsoil model and subjected to variations in temperature, methane concentration and incubation periods. As expected, temperature greatly affected methane oxidation, but methane concentration affected the rate of oxidation far more than expected. The model study implies that the complete combustion of methane to carbon dioxide is greatly affected by temperature and methane availability, whilst the effect on the uptake of methane is not as great. Seasonal variations in methane concentrations within the topsoil were monitored over a one year period from November 2002 to October 2003 and show that methane flow through the topsoil, and consequently methanotrophy, is strongly controlled by meteorology, mainly air temperature and pressure. Generally, methanotrophy was low during colder months and higher at during warmer months, but changes in air pressure complicate this by controlling the rate of flow of methane through the topsoil. δ 13C analyses of methane and carbon dioxide emitted from landfill topsoil showed that there was a great deal of methanotrophic activity during the warmer months of 2003, with most fractionation of residual methane occurring during August. During the heat wave experienced in the UK in August 2003, the δ 13C from borehole samples of methane in the anaerobic zone shifted from -57‰ to -16

  3. Prevalence, determinants and clinical correlates of vitamin D deficiency in adults with inhaled corticosteroid-treated asthma in London, UK.

    Science.gov (United States)

    Jolliffe, David A; Kilpin, Kate; MacLaughlin, Beverley D; Greiller, Claire L; Hooper, Richard L; Barnes, Neil C; Timms, Peter M; Rajakulasingam, Raj K; Bhowmik, Angshu; Choudhury, Aklak B; Simcock, David E; Hyppönen, Elina; Corrigan, Christopher J; Walton, Robert T; Griffiths, Christopher J; Martineau, Adrian R

    2016-11-05

    Vitamin D deficiency is common in children with asthma, and it associates with poor asthma control, reduced forced expiratory volume in one second (FEV1) and increased requirement for inhaled corticosteroids (ICS). Cross-sectional studies investigating the prevalence, determinants and clinical correlates of vitamin D deficiency in adults with asthma are lacking. We conducted a multi-centre cross-sectional study in 297 adults with a medical record diagnosis of ICS-treated asthma living in London, UK. Details of potential environmental determinants of vitamin D status, asthma control and medication use were collected by questionnaire; blood samples were taken for analysis of serum 25(OH)D concentration and DNA extraction, and participants underwent measurement of weight, height and fractional exhaled nitric oxide concentration (FeNO), spirometry and sputum induction for determination of lower airway eosinophil counts (n=35 sub-group). Thirty-five single nucleotide polymorphisms (SNP) in 11 vitamin D pathway genes (DBP, DHCR7, RXRA, CYP2R1, CYP27B1, CYP24A1, CYP3A4 CYP27A1, LRP2, CUBN, VDR) were typed using Taqman allelic discrimination assays. Linear regression was used to identify environmental and genetic factors independently associated with serum 25(OH)D concentration, and to determine whether vitamin D status was independently associated with Asthma Control Test (ACT) score, ICS dose, FeNO, forced vital capacity (FVC), FEV1 or lower airway eosinophilia. Mean serum 25(OH)D concentration was 50.6nmol/L (SD 24.9); 162/297 (54.5%) participants were vitamin D deficient (serum 25(OH)D concentration D status was associated with higher body mass index (P=0.014), non-White ethnicity (P=0.036), unemployment (P for trend=0.012), lack of vitamin D supplement use (PD status was not found to associate with any marker of asthma control investigated. Vitamin D deficiency is common among UK adults with ICS-treated asthma, and classical environmental determinants of serum 25(OH

  4. Antibiotic resistance and mecA characterization of coagulase-negative staphylococci isolated from three hotels in London, UK.

    Science.gov (United States)

    Xu, Zhen; Mkrtchyan, Hermine V; Cutler, Ronald R

    2015-01-01

    Antibiotic resistance in bacteria isolated from non-healthcare environments, is a potential problem to public health. In our survey a total of 71 coagulase negative staphylococci (CNS) belonging to 11 different species were isolated from three large hotels in London, UK. The most prevalent species was Staphylococcus haemolyticus, with S. hominis, S. warneri, S. cohnii, and Staphylococcus epidermidis commonly detected. Antimicrobial susceptibilities and carriage of the mecA gene were determined for all of these isolates. Most (85.9%) staphylococci were resistant to multiple antibiotics with all displaying increased susceptibility toward penicillin, fusidic acid, erythromycin, and cefepime. Twenty-one (29.5%) of the isolates were mecA positive, however MIC values to oxacillin, normally associated with the carriage of mecA, varied widely in this group (from 0.06 to 256 mg/L). Fifteen of the twenty-one mecA positive isolates carried SCCmec of these seven were type V, one type I, one type II, and one type IV. Additionally, five of these 15 isolates carried a previously unreported type, 1A, which involves an association between class A mec complex and ccr type 1. The remaining six of the 21 isolates were non-typeable and carried a combination of class A mec complex and ccrC. In addition to this, we also report on new MLST types which were assigned for five S. epidermidis isolates. Four out of these five isolates had MICs between 0.06 and 256 mg/L to oxacillin and would be regarded as clinically susceptible but one isolate had a high oxacillin MIC of 256 mg/L. We demonstrated widespread multiple drug resistance among different staphylococcal species isolated from non-healthcare environments highlighting the potential for these species to act as a reservoir for methicillin and other forms of drug resistance.

  5. Antibiotic resistance and mecA characterization of coagulase-negative staphylococci isolated from three hotels in London, UK

    Directory of Open Access Journals (Sweden)

    Zhen eXu

    2015-09-01

    Full Text Available Antibiotic resistance in bacteria isolated from non–healthcare environments, is a potential problem to public health. In our survey a total of 71 coagulase negative staphylococci belonging to 11 different species were isolated from 3 large hotels in London, UK. The most prevalent species was Staphylococcus haemolyticus, with S. hominis, S. warneri, S.cohnii and S. epidermidis commonly detected. Antimicrobial susceptibilities and carriage of the mecA gene were determined for all of these isolates. Most (85.9% staphylococci were resistant to multiple antibiotics with all displaying increased susceptibility towards penicillin, fusidic acid, erythromycin and cefepime. 21 (29.5% of the isolates were mecA positive, however MIC values to oxacillin, normally associated with the carriage of mecA, varied widely in this group (from 0.06 mg/L to 256 mg/L. 15 of the 21 mecA positive isolates carried SCCmec of these 7 were type V, 1 type I, 1 type II and 1 type IV. Additionally, five of these 15 isolates carried a previously unreported type, 1A, which involves an association between class A mec complex and ccr type 1. The remaining 6 of the 21 isolates were non-typeable and carried a combination of class A mec complex and ccrC. In addition to this, we also report on new MLST types which were assigned for 5 Staphylococcus epidermidis isolates. 4 out of these 5 isolates had MICs between 0.06 to 256 mg/L to oxacillin and would be regarded as clinically susceptible but one isolate had a high oxacillin MIC of 256 mg/L. We demonstrated widespread multiple drug resistance among different staphylococcal species isolated from non-healthcare environments highlighting the potential for these species to act as a reservoir for methicillin and other forms of drug resistance.

  6. Prevalence, determinants and clinical correlates of vitamin D deficiency in patients with Chronic Obstructive Pulmonary Disease in London, UK.

    Science.gov (United States)

    Jolliffe, David A; James, Wai Yee; Hooper, Richard L; Barnes, Neil C; Greiller, Claire L; Islam, Kamrul; Bhowmik, Angshu; Timms, Peter M; Rajakulasingam, Raj K; Choudhury, Aklak B; Simcock, David E; Hyppönen, Elina; Walton, Robert T; Corrigan, Christopher J; Griffiths, Christopher J; Martineau, Adrian R

    2017-02-01

    Vitamin D deficiency is common in patients with chronic obstructive pulmonary disease (COPD), yet a comprehensive analysis of environmental and genetic determinants of serum 25-hydroxyvitamin D (25[OH]D) concentration in patients with this condition is lacking. We conducted a multi-centre cross-sectional study in 278 COPD patients aged 41-92 years in London, UK. Details of potential environmental determinants of vitamin D status and COPD symptom control and severity were collected by questionnaire, and blood samples were taken for analysis of serum 25(OH)D concentration and DNA extraction. All participants performed spirometry and underwent measurement of weight and height. Quadriceps muscle strength (QS) was measured in 134 participants, and sputum induction with enumeration of lower airway eosinophil and neutrophil counts was performed for 44 participants. Thirty-seven single nucleotide polymorphisms (SNP) in 11 genes in the vitamin D pathway (DBP, DHCR7, CYP2R1, CYP27B1, CYP24A1, CYP27A1, CYP3A4, LRP2, CUBN, RXRA, and VDR) were typed using Taqman allelic discrimination assays. Linear regression was used to identify environmental and genetic factors independently associated with serum 25(OH)D concentration and to determine whether vitamin D status or genetic factors independently associated with % predicted forced expiratory volume in one second (FEV1), % predicted forced vital capacity (FVC), the ratio of FEV1 to FVC (FEV1:FVC), daily inhaled corticosteroid (ICS) dose, respiratory quality of life (QoL), QS, and the percentage of eosinophils and neutrophils in induced sputum. Mean serum 25(OH)D concentration was 45.4nmol/L (SD 25.3); 171/278 (61.5%) participants were vitamin D deficient (serum 25[OH]D concentration D status was independently associated with higher body mass index (P=0.001), lower socio-economic position (P=0.037), lack of vitamin D supplement consumption (PD deficiency associated with reduced % predicted FEV1 (P for trend=0.060) and % predicted

  7. Characteristics and practices of Traditional Chinese Medicine retail shops in London, UK: A cross-sectional study using an observational approach.

    Science.gov (United States)

    Teng, Lida; Shaw, Debbie; Barnes, Joanne

    2015-09-15

    Traditional Chinese Medicine (TCM) is a popular form of ethnomedicine in the UK, and is accessed by Western, Chinese and other ethnic groups. The current regulatory regime does not effectively protect the public against poor-quality and unsafe TCMs. Understanding ethnopharmacological information on how TCM is promoted and practiced may help to inform initiatives aimed at ensuring the safe use of TCMs in the UK, and put laboratory-based ethnopharmacological investigations of TCMs in a broader context. This study aimed to examine the characteristics and practices of TCM retail outlets in London, UK, and to identify factors relevant to the safe use of TCM in the UK. TCM retail outlets ('shops') in London, UK, were identified using a systematic approach. A structured questionnaire including questions on shop business type was used to recruit participant shops. Shops consenting to participate were visited within six weeks of providing consent. A piloted semi-structured questionnaire on shop characteristics was used for data collection following observation. The British National Formulary 53 was used to classify medical conditions/uses for TCMs promoted in the shops. Data were stored and analysed using MS Access 2003, MS Excel 2003 and SPSS 13. In total, 54 TCM shops in London were identified, of which 94% offered TCM consultations with a TCM practitioner. Detailed characteristics were described within 35/50 shops that gave consent to observing their premises. Most shops labelled and displayed over 150 Chinese Materia Medica (CMMs; crude materials, particularly herbs) for dispensing after consultations with a TCM practitioner. Medical conditions/uses and Patent Chinese Medicines (PCMs) were commonly promoted. In total, 794 occurrences of 205 different medical conditions/uses (median=32, QL=19, QU=48) were identified. These conditions/uses most commonly related to the following therapeutic systems: central nervous system (160/794, 20.2%); musculoskeletal and joint disease

  8. Are fuel poverty reduction schemes associated with decreased excess winter mortality in elders? A case study from London, U.K.

    Science.gov (United States)

    El Ansari, Walid; El-Silimy, Sally

    2008-12-01

    The London Borough of Newham, London piloted the Warm Zone, a government-led fuel poverty reduction scheme. Fuel poverty is often cited as a factor in excess winter mortality (EWM) in the U.K. This study reported in this paper assessed whether EWM decreased for people aged > or =65 years in Newham as compared to all London, employing data from before and throughout the duration of the Warm Zone project. The paper also discusses the difficulties surrounding the measurement and interpretation of health impact relating to fuel poverty. We calculated and compared the yearly EWM indices for people aged > or =65 years for all of London, and for Newham over 12 years (1993-2005). The yearly EWM ratio for Newham in relation to all London was then calculated and compared. No definitive evidence to support the effect of the War Zone on EMW were noted. Relationships between EWM and fewer poverty reduction schemes are difficult to interpret, as many factors are entangled. These include cold strain and biological, genetic, gender, physiological, thermoregulation, environmental, meteorological, socio-economic, healthcare provision/expenditure, lifestyle and co-morbidity aspects, besides the challenges of sample sizes and whether other fuel poverty reduction schemes were simultaneously in operation. Those in privately owned housing might be ;masked' (underestimated) in their vulnerability to fuel poverty. Redefining the specific criteria for eligibility for fuel poverty grants and tackling heat inefficiency in privately owned homes not eligible for home heating improvement despite fulfilling other criteria for vulnerability requires attention. The implications are discussed.

  9. Model simulations of cooking organic aerosol (COA) over the UK using estimates of emissions based on measurements at two sites in London

    Science.gov (United States)

    Ots, Riinu; Vieno, Massimo; Allan, James D.; Reis, Stefan; Nemitz, Eiko; Young, Dominique E.; Coe, Hugh; Di Marco, Chiara; Detournay, Anais; Mackenzie, Ian A.; Green, David C.; Heal, Mathew R.

    2016-11-01

    Cooking organic aerosol (COA) is currently not included in European emission inventories. However, recent positive matrix factorization (PMF) analyses of aerosol mass spectrometer (AMS) measurements have suggested important contributions of COA in several European cities. In this study, emissions of COA were estimated for the UK, based on hourly AMS measurements of COA made at two sites in London (a kerbside site in central London and an urban background site in a residential area close to central London) for the full calendar year of 2012 during the Clean Air for London (ClearfLo) campaign. Iteration of COA emissions estimates and subsequent evaluation and sensitivity experiments were conducted with the EMEP4UK atmospheric chemistry transport modelling system with a horizontal resolution of 5 km × 5 km. The spatial distribution of these emissions was based on workday population density derived from the 2011 census data. The estimated UK annual COA emission was 7.4 Gg per year, which is an almost 10 % addition to the officially reported UK national total anthropogenic emissions of PM2.5 (82 Gg in 2012), corresponding to 320 mg person-1 day-1 on average. Weekday and weekend diurnal variation in COA emissions were also based on the AMS measurements. Modelled concentrations of COA were then independently evaluated against AMS-derived COA measurements from another city and time period (Manchester, January-February 2007), as well as with COA estimated by a chemical mass balance model of measurements for a 2-week period at the Harwell rural site (˜ 80 km west of central London). The modelled annual average contribution of COA to ambient particulate matter (PM) in central London was between 1 and 2 µg m-3 (˜ 20 % of total measured OA1) and between 0.5 and 0.7 µg m-3 in other major cities in England (Manchester, Birmingham, Leeds). It was also shown that cities smaller than London can have a central hotspot of population density of smaller area than the

  10. "That's your patient. There's your ventilator": exploring induction to work experiences in a group of non-UK EEA trained anaesthetists in a London hospital: a qualitative study.

    Science.gov (United States)

    Snelgrove, Huon; Kuybida, Yuriy; Fleet, Mark; McAnulty, Greg

    2015-03-17

    European health systems depend increasingly on the services of health professionals who obtained their primary medical qualification from other countries. There has been a significant increase recently in fully qualified specialist doctors arriving from the European Union to provide short term or longer-term solutions to health human resources needs in the UK National Health System. These doctors often take up senior consultant positions. As a result, the NHS has had to learn to deal with both expatriation and repatriation of EU doctors as a constant dynamic characteristic of its own ability to deliver services. We conducted a qualitative study to explore the acclimatisation experience of EU doctors with qualifications in anaesthesia arriving in the United Kingdom to take up clinical employment in the NHS. The question we ask is: how do specialty registered anaesthetists who trained in other European countries experience the process of acclimatisation to practice in the United Kingdom in a large hospital in London? We did individual interviews with non-UK, EU-qualified doctors with Certification of Completion of specialty Training who were registered with the General Medical Council in the UK and could practice in the NHS as specialist anaesthetists. The doctors were all interviewed whilst working in a large NHS teaching hospital in London, UK. We analysed qualitative data from interview transcripts to identity themes and patterns regarding senior doctor's acclimatisation to the British system. Acclimatisation conceived of as transfer of clinical expertise was problematic for doctors who felt they lacked the right kind of support. Doctors sought different opportunities to share wider perspectives on care deriving from their previous experience. Hospital conceptions of acclimatisation as a highly individual process can offer an idealized view of clinical work and learning in the new system. Socio-cultural theories suggest we create regular learning opportunities for

  11. Oral health and oral health behaviours of five-year-old children in the Charedi Orthodox Jewish Community in North London, UK.

    Science.gov (United States)

    Klass, C; Mondkar, A; Wright, D

    2017-03-01

    To report on the oral health status and oral health behaviours of five-year-old Charedi Orthodox Jewish children attending schools in London, UK. Cross-sectional survey. Clinical examinations mirroring the 2015 National Dental Public Health Epidemiology Programme for England for five-year-olds and a parental questionnaire on oral health behaviours. 137 five-year-olds attending Charedi Orthodox Jewish schools in Hackney, North London. Prevalence dmft⟩0 (%) and severity (mean dmft) of dental caries. Of these children 58% had experienced dental caries (95%CI 50,67), the mean number of decayed, missing and filled teeth was 2.38 (95%CI 1.90,2.82) and 23% (95%CI 16,30) had caries affecting their incisors. Only 20% reported that their children had their teeth brushed twice a day and 16% of the children started having their teeth brushed between six months and one year of age. The oral health of five-year-old children in the Charedi Orthodox Jewish community is significantly worse than their counterparts across Hackney, London and England. The establishment of robust baseline data supports the local authority plan to develop targeted oral health improvement programmes tailored to address the health needs and cultural sensitivities of this community. Copyright© 2017 Dennis Barber Ltd.

  12. Lessons for control of heroin-associated anthrax in Europe from 2009-2010 outbreak case studies, London, UK.

    Science.gov (United States)

    Abbara, Aula; Brooks, Tim; Taylor, Graham P; Nolan, Marianne; Donaldson, Hugo; Manikon, Maribel; Holmes, Alison

    2014-07-01

    Outbreaks of serious infections associated with heroin use in persons who inject drugs (PWIDs) occur intermittently and require vigilance and rapid reporting of individual cases. Here, we give a firsthand account of the cases in London during an outbreak of heroin-associated anthrax during 2009-2010 in the United Kingdom. This new manifestation of anthrax has resulted in a clinical manifestation distinct from already recognized forms. During 2012-13, additional cases of heroin-associated anthrax among PWIDs in England and other European countries were reported, suggesting that anthrax-contaminated heroin remains in circulation. Antibacterial drugs used for serious soft tissue infection are effective against anthrax, which may lead to substantial underrecognition of this novel illness. The outbreak in London provides a strong case for ongoing vigilance and the use of serologic testing in diagnosis and serologic surveillance schemes to determine and monitor the prevalence of anthrax exposure in the PWID community.

  13. Estimating the influence of different urban canopy cover types on atmospheric particulate matter (PM10) pollution abatement in London UK.

    Science.gov (United States)

    Tallis, Matthew; Freer-Smith, Peter; Sinnett, Danielle; Aylott, Matthew; Taylor, Gail

    2010-05-01

    In the urban environment atmospheric pollution by PM10 (particulate matter with a diameter less than 10 x 10-6 m) is a problem that can have adverse effects on human health, particularly increasing rates of respiratory disease. The main contributors to atmospheric PM10 in the urban environment are road traffic, industry and power production. The urban tree canopy is a receptor for removing PM10s from the atmosphere due to the large surface areas generated by leaves and air turbulence created by the structure of the urban forest. In this context urban greening has long been known as a mechanism to contribute towards PM10 removal from the air, furthermore, tree canopy cover has a role in contributing towards a more sustainable urban environment. The work reported here has been carried out within the BRIDGE project (SustainaBle uRban plannIng Decision support accountinG for urban mEtabolism). The aim of this project is to assess the fluxes of energy, water, carbon dioxide and particulates within the urban environment and develope a DSS (Decision Support System) to aid urban planners in sustainable development. A combination of published urban canopy cover data from ground, airborne and satellite based surveys was used. For each of the 33 London boroughs the urban canopy was classified to three groups, urban woodland, street trees and garden trees and each group quantified in terms of ground cover. The total [PM10] for each borough was taken from the LAEI (London Atmospheric Emissions Inventory 2006) and the contribution to reducing [PM10] was assessed for each canopy type. Deposition to the urban canopy was assessed using the UFORE (Urban Forest Effects Model) approach. Deposition to the canopy, boundary layer height and percentage reduction of the [PM10] in the atmosphere was assessed using both hourly meterological data and [PM10] and seasonal data derived from annual models. Results from hourly and annual data were compared with measured values. The model was then

  14. Report on Proceedings of the Sixth Annual Meeting of the European CME Forum, London, UK, 14–15 November 2013

    Directory of Open Access Journals (Sweden)

    Ron Murray

    2014-01-01

    Full Text Available Delegates from around the world attended the sixth annual meeting of the European CME Forum in London between 14 and 15 November 2013. The participants discussed best practices in continuing medical education and continuing professional development (CME–CPD delivery, reviewed CME provision by various medical specialist societies, and viewed examples of e-CME educational activities in CME–CPD. The details of a new code for disclosure by European pharmaceutical companies were unveiled, and the implications were discussed with expert panels comparing the CME landscape in the United States with that in Europe. Accreditation systems were compared, and a number of informal sessions allowed the delegates to consider issues relevant to physician learners, transparency and accountability in CME planning and implementation, and opportunities for collaboration.

  15. Evaluation of the source area of rooftop scalar measurements in London, UK using wind tunnel and modelling approaches.

    Science.gov (United States)

    Brocklehurst, Aidan; Boon, Alex; Barlow, Janet; Hayden, Paul; Robins, Alan

    2014-05-01

    The source area of an instrument is an estimate of the area of ground over which the measurement is generated. Quantification of the source area of a measurement site provides crucial context for analysis and interpretation of the data. A range of computational models exists to calculate the source area of an instrument, but these are usually based on assumptions which do not hold for instruments positioned very close to the surface, particularly those surrounded by heterogeneous terrain i.e. urban areas. Although positioning instrumentation at higher elevation (i.e. on masts) is ideal in urban areas, this can be costly in terms of installation and maintenance costs and logistically difficult to position instruments in the ideal geographical location. Therefore, in many studies, experimentalists turn to rooftops to position instrumentation. Experimental validations of source area models for these situations are very limited. In this study, a controlled tracer gas experiment was conducted in a wind tunnel based on a 1:200 scale model of a measurement site used in previous experimental work in central London. The detector was set at the location of the rooftop site as the tracer was released at a range of locations within the surrounding streets and rooftops. Concentration measurements are presented for a range of wind angles, with the spread of concentration measurements indicative of the source area distribution. Clear evidence of wind channeling by streets is seen with the shape of the source area strongly influenced by buildings upwind of the measurement point. The results of the wind tunnel study are compared to scalar concentration source areas generated by modelling approaches based on meteorological data from the central London experimental site and used in the interpretation of continuous carbon dioxide (CO2) concentration data. Initial conclusions will be drawn as to how to apply scalar concentration source area models to rooftop measurement sites and

  16. Quality of Life and Unmet Need in People with Psychosis in the London Borough of Haringey, UK

    Directory of Open Access Journals (Sweden)

    Maria Lambri

    2012-01-01

    Full Text Available Objectives. Deinstitutionalization of long-term psychiatric patients produced various community-based residential care facilities. However, inner-city areas have many patients with severe mental illness (SMI as well as deprivation, unemployment, and crime. This makes meeting their community needs complex. We undertook a needs assessment of service provision and consonance between service users’ evaluation of need and by care workers. Design. Cross-sectional study with random sample of SMI service users in four housing settings: rehabilitation units; high-supported; medium-supported; low-supported housing. Setting. London Borough of Haringey. Outcome Measures. 110 SMI service users and 110 keyworkers were interviewed, using Camberwell Assessment of Need; SF-36; Lancashire Quality-of-Life profile; demographic and clinical information. Results. People in “low-support” and “high-support” housing had similar symptom scores, though low support had significantly lower quality of life. Quality of life was positively predicted by self-reported mental-health score and negatively predicted by unmet-need score in whole sample and in medium-support residents. Residents’ and care-workers’ assessments of need differed considerably. Conclusions. Although patients’ housing needs were broadly met, those in low-supported housing fared least well. Attendance to self-reported mental health and unmet social needs to quality of life underpins planning of residential services for those with SMI. Social and personal needs of people in supported housing may be underestimated and overlooked; service providers need to prioritise these if concept of “recovery” is to advance.

  17. London 2012: Medal projection

    OpenAIRE

    2012-01-01

    We project the medal number and medal ranking for the Olympic Games in London in 2012. The largest relative increase is predicted for Brazil (80% more medals) and the UK (+28%). UK will continue to rank 4th. The largest decreases in medal numbers are predicted for Australia (-13%, but remains in 5th place) and the USA (-13%, remains No. 1). Germany should retain a rank of 6th and will win 38 medals (compared to 41 in 2008).

  18. Before the ban--an exploratory study of a local khat market in East London, U.K.

    Science.gov (United States)

    Kassim, Saba; Dalsania, Asha; Nordgren, Johan; Klein, Axel; Hulbert, Josh

    2015-06-12

    Khat is a green leaf with amphetamine-like effects. It is primarily used among people in Africa, the Middle East and in the diaspora communities from these countries. Prior to the prohibition of khat in the UK on 24 June 2014, there was almost no information available on key aspects of the local khat market. A cross-sectional study was conducted in 2012 using snowball sampling, Privileged Access Interviewing and area mapping in order to identify khat sale establishments. Data was collected via face-to-face interviews using mixed methods for data collection. This included information about the establishments selling khat, khat pricing and its use among different ethnic minority groups, in addition to the potential sale of khat to children and risk assessment (e.g., use of pesticides on khat). Five out of seven sellers identified agreed to participate. Sellers described their khat sale establishments as 'community centres' which included, for example, a restaurant basement. The sellers' history of selling khat ranged between 1-15 years and khat's sale took place between 2pm-10pm. Miraa (e.g., Lara) from Kenya was the most popularly used khat variety, sold in pre-wrapped bundles of approximately 250 g costing £3 each and delivered four days a week. Harari (e.g., Owdi) from Ethiopia was sold in 200 g, 400 g and 1 kg bundles, priced between £5 and £20 and delivered two days a week. The primary benefit of khat use was reported to be social interaction. The customers were predominantly adult males of Somali origin. Most sellers claimed a self-imposed ban on sales to children under 18 years old. Khat bundles had no labelling describing variety or weight and sellers had no knowledge of the use of pesticides on khat and did not advertise the risks associated with khat use. Khat selling establishments were businesses that did not adhere to trade standards regulations (e.g., labelling khat bundles). They claimed to provide a community service (facilitating social

  19. Patterns of long bone growth in a mid-19th century documented sample of the urban poor from Bethnal Green, London, UK.

    Science.gov (United States)

    Ives, Rachel; Humphrey, Louise

    2017-05-01

    Studies of male and female long bone growth in past populations are limited and usually constrained by the lack of personal identification. This article aimed to evaluate long bone growth in a series of mid-19(th) century documented burials associated with the urban poor from Bethnal Green, London, UK. Maximum diaphyseal lengths from 74 males and 70 females (2 months to 12 years) were compared to modern reference data from North America. Diaphyseal lengths were expressed as a percentage of expected length and an average percentage value was calculated across all available long bones. An index of growth progression was introduced to explore differences in the progress of males and females towards their projected adult size. Deviation from the expected growth attainment was evident in both sexes in the archaeological series by 2-4 months of age. Only 19.4% (28/144) of the children had attained an average long bone length >90% of the predicted mean in the reference series. The percentage of expected growth attainment decreased steadily in both sexes during infancy and early childhood. Overall, females deviated further from their expected growth progression than males. Growth faltering in both males and females was established during infancy (growth. © 2017 Wiley Periodicals, Inc.

  20. The introduction of 10% renewable energy in every building. Possibility or probability? Case study: Granville plus community Centre London, UK

    Science.gov (United States)

    Tsitnidis, Petros

    This thesis investigates the ways of producing 10% of the energy consumed in a site from renewable energy sources. It analyses how this can be accomplished by considering the general frame of the subject and referring to the general problem of climate change and its effects on the planet. Special attention is paid to architecture and an attempt is made to answer the question how the built environment can cope with this problem. Reference is also made to the UK's latest guidelines on the issue. The introduction of the 10% renewable energy use in buildings, known as the "Merton Rule", is one of the most pioneering guidelines towards sustainability. The thesis is continued with the post-occupancy assessment on a four year-old building, part of a much older community center complex that has been built with very advanced design and strict environmental targets but suffers from lack of care and management. The building does not achieve optimum performance as there are difficulties with various stakeholders in the buildings management. This thesis, therefore, examines possible solutions and suggests ways of improvement. The study concludes with remarks and suggestions based on simulation and assessment procedures. New ventilation strategies are proposed to be introduced to the building together with a series of ways to reduce the highest internal temperatures of the first floor. Extensive reference is also made to the initial sustainable approach of the design. The interventions proposed have as a target the improvement of the energy performance and the minimization of the carbon footprint of the building. Keywords: environmental design, sustainable architecture, granville plus, Merton Rule.

  1. Screening for latent TB, HIV, and hepatitis B/C in new migrants in a high prevalence area of London, UK: a cross-sectional study.

    Science.gov (United States)

    Hargreaves, Sally; Seedat, Farah; Car, Josip; Escombe, Rod; Hasan, Samia; Eliahoo, Joseph; Friedland, Jon S

    2014-12-03

    Rising rates of infectious diseases in international migrants has reignited the debate around screening. There have been calls to strengthen primary-care-based programmes, focusing on latent TB. We did a cross-sectional study of new migrants to test an innovative one-stop blood test approach to detect multiple infections at one appointment (HIV, latent tuberculosis, and hepatitis B/C) on registration with a General Practitioner (GP) in primary care. The study was done across two GP practices attached to hospital Accident and Emergency Departments (A&E) in a high migrant area of London for 6 months. Inclusion criteria were foreign-born individuals from a high TB prevalence country (>40 cases per 100,000) who have lived in the UK ≤ 10 years, and were over 18 years of age. All new migrants who attended a New Patient Health Check were screened for eligibility and offered the blood test. We followed routine care pathways for follow-up. There were 1235 new registrations in 6 months. 453 attended their New Patient Health Check, of which 47 (10.4%) were identified as new migrants (age 32.11 years [range 18-72]; 22 different nationalities; time in UK 2.28 years [0-10]). 36 (76.6%) participated in the study. The intervention only increased the prevalence of diagnosed latent TB (18.18% [95% CI 6.98-35.46]; 181.8 cases per 1000). Ultimately 0 (0%) of 6 patients with latent TB went on to complete treatment (3 did not attend referral). No cases of HIV or hepatitis B/C were found. Foreign-born patients were under-represented at these practices in relation to 2011 Census data (Chi-square test -0.111 [95% CI -0.125 to -0.097]; p < 0.001). The one-stop approach was feasible in this context and acceptability was high. However, the number of presenting migrants was surprisingly low, reflecting the barriers to care that this group face on arrival, and none ultimately received treatment. The ongoing UK debate around immigration checks and charging in primary care for new

  2. Personal exposure of street canyon intersection users to PM 2.5, ultrafine particle counts and carbon monoxide in Central London, UK

    Science.gov (United States)

    Kaur, S.; Nieuwenhuijsen, M.; Colvile, R.

    Short-term human exposure to PM 2.5, ultrafine particle counts (particle range: 0.02-1 μm) and carbon monoxide (CO) was investigated at and around a street canyon intersection in Central London, UK. During a four-week field campaign, groups of four volunteers collected samples at three timings (morning, lunch and afternoon), along two different routes (a heavily trafficked route and a backstreet route) via five modes of transport (walking, cycling, bus, car and taxi). PM 2.5 was sampled using high-flow gravimetric personal samplers, ultrafine particle counts were measured using TSI P-TRAKs and Langans were used to measure CO exposure. Three hundred and ninety-four samples were collected—197 PM 2.5, 86 ultrafine particle count and 111 CO. Arithmetic means of PM 2.5 personal exposure were 27.5, 33.5, 34.5, 38.0 and 41.5 μg m -3, ultrafine particle counts were 67 773, 93 968, 101 364, 99 736 and 87 545 pt cm -3 and CO levels were 0.9, 1.1, 0.8, 1.3 and 1.1 ppm for walking, cycling, bus, car and taxi respectively. On the heavily trafficked route, personal exposure was 35.3 μg m -3, 101142 pt cm -3 and 1.3 ppm, and on the backstreet route it was 31.8 μg m -3, 71628 pt cm -3 and 0.6 ppm for PM 2.5, ultrafine particle counts and CO, respectively. Personal exposure levels were high during the morning measurements for all three pollutants (34.6 μg m -3, 106 270 pt cm -3 and 1.5 ppm for PM 2.5, ultrafine particle counts and CO, respectively).There was a moderately strong correlation between personal exposure of ultrafine particle counts and CO ( r=0.7, N=67) but a weaker correlation between PM 2.5 and ultrafine particle counts ( r=0.5, N=83) and a low correlation between PM 2.5 and CO exposure ( r=0.2, N=105). The exposure assessment also revealed that the background and kerbside monitoring stations were not representative of the personal exposure of individuals to PM 2.5 and CO at and around a street canyon intersection.

  3. Nutrition Labeling and Portion Size Information on Children's Menus in Fast-Food and Table-Service Chain Restaurants in London, UK

    Science.gov (United States)

    Reeves, Sue; Wake, Yvonne; Zick, Andrea

    2011-01-01

    Objective: To investigate meals, price, nutritional content, and nutrition and portion size information available on children's menus in fast-food and table-service chain restaurants in London, since the United Kingdom does not currently require such information but may be initiating a voluntary guideline. Methods: Children's menus were assessed…

  4. London 2012 - Medal Projection - Medaillenvorausberechnung

    OpenAIRE

    2012-01-01

    We project the medal number and medal ranking for the Olympic Games in London in 2012. The largest relative increase is predicted for Brazil (80% more medals) and the UK (+28%).UK will conti-nue to rank 4th. The largest decreases in medal numbers are predicted for Australia (-13%, but remains in 5th place) and the USA (-13%, remains No. 1). Germany should retain a rank of 6th and will win 38 medals (compared to 41 in 2008).

  5. Partnerships in Pharma--An Economist Intelligence Unit Seminar--Building Innovation into Alliances and Business Models. 1 October 2010, London, UK.

    Science.gov (United States)

    Kibble, Alexandra

    2010-12-01

    The Partnerships in Pharma seminar, held in London, included topics related to building innovation into alliances and business models within the pharmaceutical industry. This conference report highlights selected presentations on strategies for successful partnering, partnering alongside an evolving CRO industry, considering the pharma value chain, and partnerships between industry and academia. Approaches used by Ipsen, Merck Serono, Pfizer and ViiV Healthcare are also described.

  6. The 8th International Conference on Counter-current Chromatography held at Brunel University, London, UK, July 23-25, 2014.

    Science.gov (United States)

    Ignatova, Svetlana; Sutherland, Ian

    2015-12-18

    The 8th International Conference on Counter-current Chromatography (CCC2014) was held at Brunel University London from July 23rd to 25th, 2014. It has been 14 years since Brunel hosted the first International Conference on CCC (CCC2000) at the beginning of the millennium and therefore, it was a good opportunity to review the progress of this emerging technology and particularly the impact it is having with industry today.

  7. Fritz London

    Science.gov (United States)

    Gavroglu, Kostas

    2005-11-01

    Preface; Acknowledgements; Part I. From Philosophy to Physics: The years that left nothing unaffected; 1. The appeal of ideas; 2. Goëthe as a scientist; 3. How absolute is our knowledge?; 4. How do we come to know things?; 5. London's teachers in philosophy; 6. Husserl's teachings; 7. Expectations of things to come; 8. The thesis in philosophy; 9. Tolman's principle of similitude; 10. The necessary clarifications; 11. Work on quantum theory; 12. Transformation theory; 13. Unsuccessful attempts at unification; Part II. The Years in Berlin and the Beginnings of Quantum Chemistry: The mysterious bond; 14. London in Zürich; 15. Binding forces; 16. The Pauli principle; 17. Reactions to the Heitler-London paper; 18. Polyelectronic molecules and the application of group theory to problems of chemical valence; 19. Chemists as physicists?; 20. London's first contacts in Berlin; 21. Marriage; 22. Job offers; 23. Intermolecular forces; 24. The book which could not be written; 25. Leningrad and Rome; 26. Difficulties with group theory; 27. Linus Pauling's resonance structures; 28. Robert Mulliken's molecular orbitals; Part III. Oxford and Superconductivity: The rise of the Nazis; 29. Going to Oxford; 30. Lindemann, Simon and Heinz London; 31. Electricity in the very cold; 32. The end of old certainties; 33. The thermodynamic treatment; 34. The theory of Fritz and Heinz London; 35. Initial reactions by von Laue; 36. The discussion at the Royal Society; 37. Termination of the ICI fellowship; Part IV. Paris and Superfluidity: The Front Populaire; 38. The article in Nature 1937 and 'Nouvelle Conception'; 39. Laue again; 40. The structure of solid helium; 41. The peculiar properties of helium; 42. Bose-Einstein condensation; 43. The note in Nature; 44. The two-fluid model; 45. The trip to Jerusalem; 46. Leaving again; 47. The observer in quantum mechanics; Part V. United States and the Typing up of Loose Ends: Duke University, North Carolina; 48. The Soviet Union, Kapitza and

  8. 17 April 2013 - UK Queen Mary University London Principal S. Gaskell in the ATLAS control room at LHC Point 1, LHC tunnel and ATLAS experimental cavern with Collaboration Spokesperson D. Charlton and signing the guest book with CERN Director for Accelerators and Technology S. Myers.

    CERN Multimedia

    Maximilien Brice

    2013-01-01

    17 April 2013 - UK Queen Mary University London Principal S. Gaskell in the ATLAS control room at LHC Point 1, LHC tunnel and ATLAS experimental cavern with Collaboration Spokesperson D. Charlton and signing the guest book with CERN Director for Accelerators and Technology S. Myers.

  9. What factors influence UK medical students’ choice of foundation school?

    OpenAIRE

    Miah S; Pang KH; Rebello W; Rubakumar Z; Fung V; Venugopal S.; Begum H

    2017-01-01

    Saiful Miah,1,2 Karl H Pang,3 Wayne Rebello,4 Zoe Rubakumar,4 Victoria Fung,5 Suresh Venugopal,6 Hena Begum4 1Division of Surgery and Interventional science, University College London, London, UK; 2Department of Urology, Charing Cross Hospital Imperial College Healthcare NHS Trust, London, UK; 3Academic Urology Unit, University of Sheffield, Sheffield, UK; 4Medical School, University of Sheffield, Sheffield, UK; 5Department of Plastic Surgery, Royal Hallamshire Hospital, Sheffield, UK; 6Depar...

  10. Rail environmental impact: energy consumption and noise pollution assessment of different transport modes connecting Big Ben (London, UK and Eiffel Tower (Paris, FR

    Directory of Open Access Journals (Sweden)

    Roberto PALACIN

    2014-10-01

    Full Text Available This paper is set within the framework of the RailNewcastle Summer School program 2014 run by Newcastle University. It attempts to explore the sustainability credentials of railways when compared with other transport modes connecting central London with central Paris, two of Europe’s largest metropolis. Specifically, the study compares the energy consumption and noise pollution of a rail-only travel option with two other alternatives using a combination of public transport modes. The analysis includes defining the regulatory framework, sourcing and aggregating energy consumption from a number of references as well as creating noise maps for key nodes using validated tools available. The results suggest that the rail-only option has the best performance of the three options in terms of energy consumption while a bus-coach-metro combination seems to have lower noise levels than the rest. Assumptions due to lack of meaningful data made in the calculation of underground rail services are thought to have influence on the lower than expected performance of rails systems in terms of noise. The authors conclude that considering the combined outcomes of both assessments, the rail-only option is the preferred choice from a sustainability credentials perspective.

  11. Early virological response to HIV treatment: can we predict who is likely to experience subsequent treatment failure? Results from an observational cohort study, London, UK.

    Science.gov (United States)

    Brima, Nataliya; Lampe, Fiona C; Copas, Andrew; Gilson, Richard; Williams, Ian; Johnson, Margaret A; Phillips, Andrew N; Smith, Colette J

    2017-08-30

    For people living with HIV, the first antiretroviral treatment (ART) regimen offers the best chance for a good virological response. Early identification of those unlikely to respond to first-line ART could enable timely intervention and increase chances of a good initial treatment response. In this study we assess the extent to which the HIV RNA viral load (VL) at 1 and 3 months is predictive of first-line treatment outcome at 6 months. Methods All previously ART-naive individuals starting ART at two London centres since 2000 with baseline (-180 to 3 days) VL >500 c/mL had a VL measurement between 6 and 12 months after starting ART, and at least one at month 1 (4-60 days) or month 3 (61-120 days) were included. Lack of treatment response was defined as (i) VL >200 copies/mL at 6 months or (ii) VL >200 copies/mL at 6 months or simultaneous switch in drugs from at least two different drug classes before 6 months. The association with VL measurements at 1 and 3 months post-ART; change from pre-ART in these values; and CD4 count measurements at 1 and 3 months were assessed using logistic regression models. The relative fit of the models was compared using the Akaike information criterion (AIC). A total of 198 out of 3258 individuals (6%) experienced lack of treatment response at 6 months (definition i), increasing to 511 (16%) for definition (ii). Those with a 1-month (day 4-60 window) VL of 100,000 copies/ml had a 4%, 8%, 23% and 24% chance, respectively, of subsequently experiencing treatment non-response at 6 months (definition (i)). When considering the 3-month (day 61-120 window) VL, the chances of subsequently experiencing treatment non-response were, respectively, 3%, 25%, 67% and 75%. Results were similar for definition (ii). Whilst 3-month VL provides good discrimination between low and high risk of treatment failure, 1-month VL does not. Presence of a VL >10,000 copies/ml after 3 months of ART is a cutoff above which individuals are at a

  12. Special issue of selected papers from the second UK-Japan bilateral Workshop and First ERCOFTAC Workshop on Turbulent Flows Generated/Designed in Multiscale/Fractal Ways, London, March 2012

    Science.gov (United States)

    Laizet, Sylvain; Sakai, Yasuhiko; Christos Vassilicos, J.

    2013-12-01

    This special issue of Fluid Dynamics Research includes nine papers which are based on nine of the presentations at the Second UK-Japan bilateral Workshop and First ERCOFTAC Workshop on 'Turbulent flows generated/designed in multiscale/fractal ways: fundamentals and applications' held from 26 to 27 March 2012 at Imperial College London, UK. The research area of fractal-generated turbulent flows started with a chapter published in 2001 in one of the conference proceedings which came out of the 1999 Isaac Newton Institute 6 month Programme on Turbulence in Cambridge (UK). However, the first results which formed the basis of much of the work reported in this special issue started appearing from 2007 onwards and progress since then could perhaps be described as not insignificant. Research in this area has resulted in the following six notable advances: (a) the definition of two new length-scales characterizing grid-generated turbulence; (b) enhanced and energy-efficient stirring and scalar transfer by fractal grid and fractal openings/flanges with applications, in particular, to improved turbulence generation for combustion; (c) the non-equilibrium turbulent dissipation law; (d) non-equilibrium axisymmetric wake laws; (e) insights into the dependence of drag forces and vortex shedding on the fractal geometry of fractal objects and simulation methods for the calculation of drag of fractal trees; and (f) the invention and successful proof of concept of fractal spoilers and fractal fences. The present special issue contains papers directly related to these advances and can be seen as a reflection of the current research in the field of fractal-generated turbulent flows and their differences and commonalities with other turbulent flows. The financial support from the Japan Society for the Promotion of Science has been decisive for the organization and success of this workshop. We are also grateful to ERCOFTAC who put in place the EU-wide Special Interest Group on multiscale

  13. London, England

    Science.gov (United States)

    2003-01-01

    For almost 2,000 years, the River Thames has served as the life force of London, capital of the United Kingdom and one of the world's most famous cities. In AD 43 the Romans established the trading settlement of Londinium at a favorable crossing point on the river. The Romans remained until the 5th century, when the city came under Saxon control. The early 17th century saw enormous growth, but the deadly plague of 1664 and 1665 ravaged the population, and in the following year the Great Fire, which burned for four days, destroyed most of the city. A public transportation system and other city services in the early 19th century eased many of the increasing urban problems of the burgeoning capital of the wealthy British Empire. After coping with the devastating effects of bombing during World War II and the gradual dismantling of the empire, London today thrives as a vital modern metropolis. London is one of 100 cities being studied using ASTER data to map and monitor urban use patterns and growth.This image was acquired on October 12, 2001 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite. With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet.ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products.The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping, and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring

  14. Institutional profile: the London Centre for Nanotechnology.

    Science.gov (United States)

    Weston, David; Bontoux, Thierry

    2009-12-01

    Located in the London neighborhoods of Bloomsbury and South Kensington, the London Centre for Nanotechnology is a UK-based multidisciplinary research center that operates at the forefront of science and technology. It is a joint venture between two of the world's leading institutions, UCL and Imperial College London, uniting their strong capabilities in the disciplines that underpin nanotechnology: engineering, the physical sciences and biomedicine. The London Centre for Nanotechnology has a unique operating model that accesses and focuses the combined skills of the Departments of Chemistry, Physics, Materials, Medicine, Electrical and Electronic Engineering, Mechanical Engineering, Chemical Engineering, Biochemical Engineering and Earth Sciences across the two universities. It aims to provide the nanoscience and nanotechnology required to solve major problems in healthcare, information processing, energy and the environment.

  15. IEEE Prize for Lucio Rossi

    CERN Multimedia

    IEEE Council on Superconductivity

    2007-01-01

    Lucio Rossi receives his prize from John Spargo, Chairman of the IEEE Council on Superconductivity (left), and Martin Nisenoff, Chairman of the Council on Superconductivity's Awards Committee (right).

  16. 14 April 2014 - UK University College London Hospitals and National Health Service Foundation Trust Chairman R. Murley in the ATLAS cavern with CERN Head of Medical Applications S. Myers and Collaboration Spokesperson D. Charlton.

    CERN Multimedia

    Gadmer, Jean-Claude

    2014-01-01

    Mr Richard Murley Chairman Sir Robert Naylor Chief Executive University College London Hospitals (UCLH) – National Health Service (NHS) Foundation Trust United Kingdom of Great Britain and Northern Ireland

  17. Access to IEEE Electronic Library

    CERN Multimedia

    2007-01-01

    From 2007, the CERN Library now offers readers online access to the complete IEEE Electronic Library (Institute of Electrical and Electronics Engineers). This new licence gives unlimited online access to all IEEE and IET (previously IEE) journals and proceedings as well as all current IEEE standards and selected archived ones. Some of the titles offer volumes back to 1913. This service currently represents more than 1,400,000 full-text articles! This leading engineering information resource replaces the previous service, a sub-product of the IEEE database called 'IEEE Enterprise', which offered online access to the complete collection of IEEE journals and proceedings, but with limited features. The service had become so popular that the CERN Working Group for Acquisitions recommended that the Library subscribe to the complete IEEE Electronic Library for 2007. Usage statistics for recent months showed there was a demand for the service from a large community of CERN users and we were aware that many users h...

  18. News Astronomy: Science and beauty combined Africa: Physics technicians offer valuable skills Conference: ESERA2013 brings researchers together in Cyprus Physics Olympiad: UK team bring home more medals from the Physics Olympics in Copenhagen Physics Tournament: IOC backs Shrewsbury to host IYPT 2014 Conference: MPTL18 looks at the latest multimedia developments Workshop: The selective absorption of light Science on Stage: Illuminating Science Education in London in 2015

    Science.gov (United States)

    2013-11-01

    Astronomy: Science and beauty combined Africa: Physics technicians offer valuable skills Conference: ESERA2013 brings researchers together in Cyprus Physics Olympiad: UK team bring home more medals from the Physics Olympics in Copenhagen Physics Tournament: IOC backs Shrewsbury to host IYPT 2014 Conference: MPTL18 looks at the latest multimedia developments Workshop: The selective absorption of light Science on Stage: Illuminating Science Education in London in 2015

  19. The London Congestion Charge

    National Research Council Canada - National Science Library

    Leape, Jonathan

    2006-01-01

    .... In early 2003, London imposed a congestion charge—a daily charge for driving or parking a vehicle on public roads within central London between the hours of 7:00 a.m. and 6:30 p.m. on workdays...

  20. UK Parkinson's Excellence Network: empowering service improvement across the UK.

    Science.gov (United States)

    Burn, David

    2015-01-01

    Parkinson's UK, together with leading Parkinson's professionals, has set up the UK Parkinson's Excellence Network to bring together the passion and expertise of leading clinicians with the strategic leadership and resources of Parkinson's UK underpinned by the voice of people affected by Parkinson's. Launched in London in February 2015, the Excellence Network aims to drive sustainable improvements in health and social care services. It will provide a more strategic approach to clinical development so that Parkinson's services across health and social care can be transformed to provide the best quality care across the UK.

  1. White Tower, London, England

    OpenAIRE

    William the Conqueror; William Rufus; Henry I

    2007-01-01

    White Tower (Tower of London), London, England. Photograph taken by Terry Barry. There is restoration work being carried out on one of the towers. The White Tower is a central tower at the Tower of London. The great central keep was built by William the Conqueror and finished by his sons and successors, William Rufus and Henry I, around 1087. It is 90 feet high and is of massive construction, the walls varying from 15 feet thickness at the base to almost 11 feet in the upper parts. Above ...

  2. Taaskasutuses London / Marlen Promann

    Index Scriptorium Estoniae

    Promann, Marlen

    2007-01-01

    "100% Disain London" messist, kus peateemaks oli säästlikkus disainis, materjalides, tehnoloogias ja tootmises. Markko Karu jõudis sellel noore disainiettevõtja auhinna finaali (International Young Design Entrepreneur of the Year)

  3. Materials modelling in London

    Science.gov (United States)

    Ciudad, David

    2016-04-01

    Angelos Michaelides, Professor in Theoretical Chemistry at University College London (UCL) and co-director of the Thomas Young Centre (TYC), explains to Nature Materials the challenges in materials modelling and the objectives of the TYC.

  4. The London Congestion Charge

    National Research Council Canada - National Science Library

    Leape, Jonathan

    2006-01-01

    .... Traffic congestion has declined substantially, and the program is largely popular. This article describes the origins of the London congestion charge, how it overcame practical and theoretical difficulties, and what effects it has had...

  5. Taaskasutuses London / Marlen Promann

    Index Scriptorium Estoniae

    Promann, Marlen

    2007-01-01

    "100% Disain London" messist, kus peateemaks oli säästlikkus disainis, materjalides, tehnoloogias ja tootmises. Markko Karu jõudis sellel noore disainiettevõtja auhinna finaali (International Young Design Entrepreneur of the Year)

  6. IEEE Conference Publications in Libraries.

    Science.gov (United States)

    Johnson, Karl E.

    1984-01-01

    Conclusions of surveys (63 libraries, OCLC database, University of Rhode Island users) assessing handling of Institute of Electrical and Electronics Engineers (IEEE) conference publications indicate that most libraries fully catalog these publications using LC cataloging, and library patrons frequently require series access to publications. Eight…

  7. IEEE Conference Publications in Libraries.

    Science.gov (United States)

    Johnson, Karl E.

    1984-01-01

    Conclusions of surveys (63 libraries, OCLC database, University of Rhode Island users) assessing handling of Institute of Electrical and Electronics Engineers (IEEE) conference publications indicate that most libraries fully catalog these publications using LC cataloging, and library patrons frequently require series access to publications. Eight…

  8. IEEE Prize for Lucio Rossi

    CERN Multimedia

    2007-01-01

    Lucio Rossi receives his prize from John Spargo, Chairman of the IEEE Council on Superconductivity (left), and Martin Nisenoff, Chairman of the Council on Superconductivity’s Awards Committee (right). (Photo: IEEE Council on Superconductivity)With the magnets installed in the tunnel and work on the interconnections almost completed, Lucio Rossi has reaped the rewards of fifteen years of work. And yet, when the physicist from Milan arrived to take charge of the group responsible for the superconducting magnets in 2001, success seemed far from assured. Endowed with surprising levels of energy, Lucio Rossi, together with his team, ensured that production of these highly complex magnets got underway. Today, that achievement earns them the recognition not only of CERN but also of the international superconducting community. It is for this achievement that Lucio Rossi was awarded the prize by the IEEE’s (Institute of Electrical an...

  9. Space in Pentecostal healing practices among Ghanaian migrants in London

    NARCIS (Netherlands)

    Krause, K.

    2014-01-01

    In this article I analyse different spatial practices related to Pentecostal healing, drawing on fieldwork with Pentecostal believers who have migrated from Ghana to London, UK. I explore the relationship between space and the manifestation of the Holy Spirit by looking at how points of contact with

  10. SCHOLARSHIPS AT LONDON MET

    Institute of Scientific and Technical Information of China (English)

    杜松

    2006-01-01

    London Metropolitan University has a widerange of scholarship programmes for internationalstudents.We offer full and partial scholarships tooustandifg students from all over the world. Ourprogrammes include joint scholarships with BBCWorld Service, Asia House, International StudentsHouse and other global organisations.If you have outstanding academic results,and an excellent track record, please see our

  11. Kommunisme i London

    DEFF Research Database (Denmark)

    Hansen, Brian Benjamin; Nielsen, Kasper Porsgaard

    2010-01-01

    Begrebet ”kommunisme” var på dagsordenen, da over 800 mennesker mødtes i Birkbeck University College i London, den 13.-15. marts, 2009. En perlerække af talere var inviteret: Alain Badiou, Michael Hardt, Bruno Bosteels, Peter Hallward, Allesandro Russo, Alberto Toscano, Toni Negri, Terry Eagleton...

  12. Charmed Life in Contemporary London

    DEFF Research Database (Denmark)

    2011-01-01

    Documentary film produced for the Miracles and Charms exhibition at the Wellcome Collection, London......Documentary film produced for the Miracles and Charms exhibition at the Wellcome Collection, London...

  13. Think London, Think china

    Institute of Scientific and Technical Information of China (English)

    Yang Wei

    2008-01-01

    @@ The China-UK relationship has a long history and is one of the most important contemporary China-European ties.The UK was the first western country to recognize the People's Republic of China after it was founded in 1949.Later,the two sides reached an agreement to exchange Charges d'Affairs in 1954,and signed the Joint Communiqué for the Agreement on the Exchange of Ambassadors in 1972.

  14. Throughput Limits of IEEE 802.11 and IEEE 802.15.3

    OpenAIRE

    Ullah, Sana; Zhong, Yingji; Islam, S. M. Riazul; Nessa, Ahasanun; Kwak, Kyung Sup

    2009-01-01

    IEEE 802.11 and IEEE 802.15.3 are wireless standards originally designed for wireless local area network (WLAN) and wireless personal area network (WPAN). This paper studies MAC throughput analysis of both standards. We present a comparative analysis of both standards in terms of MAC throughput and bandwidth efficiency. Numerical results show that the performance of IEEE 802.15.3 transcends IEEE 802.11 in all cases.

  15. Adidas Eyes Olympics to Take Nike's UK Crown

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    German sportswear maker Adidas plans to use the Olympic Games in London next year to generate 100 million pounds($165 million)of sales in the UK and steal market leadership there from arch rival Nike.

  16. A pilot randomised controlled trial of personalised care for depressed patients with symptomatic coronary heart disease in South London general practices: the UPBEAT-UK RCT protocol and recruitment

    Directory of Open Access Journals (Sweden)

    Tylee André

    2012-06-01

    Full Text Available Abstract Background Community studies reveal people with coronary heart disease (CHD are twice as likely to be depressed as the general population and that this co-morbidity negatively affects the course and outcome of both conditions. There is evidence for the efficacy of collaborative care and case management for depression treatment, and whilst NICE guidelines recommend these approaches only where depression has not responded to psychological, pharmacological, or combined treatments, these care approaches may be particularly relevant to the needs of people with CHD and depression in the earlier stages of stepped care in primary care settings. Methods This pilot randomised controlled trial will evaluate whether a simple intervention involving a personalised care plan, elements of case management and regular telephone review is a feasible and acceptable intervention that leads to better mental and physical health outcomes for these patients. The comparator group will be usual general practitioner (GP care. 81 participants have been recruited from CHD registers of 15 South London general practices. Eligible participants have probable major depression identified by a score of ≥8 on the Hospital Anxiety and Depression Scale depression subscale (HADS-D together with symptomatic CHD identified using the Modified Rose Angina Questionnaire. Consenting participants are randomly allocated to usual care or the personalised care intervention which involves a comprehensive assessment of each participant’s physical and mental health needs which are documented in a care plan, followed by regular telephone reviews by the case manager over a 6-month period. At each review, the intervention participant’s mood, function and identified problems are reviewed and the case manager uses evidence based behaviour change techniques to facilitate achievement of goals specified by the patient with the aim of increasing the patient’s self efficacy to solve their

  17. IEEE WEA 2012 - Mejores Trabajos

    Directory of Open Access Journals (Sweden)

    Miguel Alberto Melgarejo Rey

    2013-06-01

    Full Text Available El 2012 Workshop on Engineering Applications (WEA 2012 realizado porla Facultad de Ingeniería de la Universidad Distrital Francisco José deCaldas y su rama estudiantil IEEE (Institute for Electrical and ElectronicsEngineers, del 2 al 4 de mayo de 2012, fue un espacio académico dondeconvergieron academia e industria alrededor de áreas tan diversas comoel control, las comunicaciones, la electrónica de potencia, el procesamientode señales entre otras .A pesar de ser la primera edición delWEA, esta se caracterizó por una nutrida participación, se recibieron 69artículos, 49 provenientes de Colombia y 20 de otros países.

  18. "Every morning before you open the door you have to watch for that brown envelope": complexities and challenges of undertaking oral history with Ethiopian forced migrants in London, UK.

    Science.gov (United States)

    Palmer, David

    2010-01-01

    The experience, "voice," and perceptions of the "individual refugee" is conspicuous by its virtual absence from academic research. The few studies dealing with black adn minority ethnic experiences from an emic perspective in relation to mental health do not specifically refer to refugees or asylum seekers. This article explores the use of oral history techniques when researching Ethiopian forced migrants in the U.K. Based on two pilot research projects which explored Ethiopian culture and experience in reference to mental health adn well-being, it will focus on some of the complexities and challenges encountered. This article acknowledges the need for an understanding of cultural traditions as well as history and experience when planning and implementing such research as this proved to be an essential part of the research process, ensuring that individual stories and truths were allowed to evolve. The oral history approach for this research therefore ensured that the experiential knowledge of the Ethiopian forced migrant participants was given space, authenticity, and validity.

  19. OT {-(Uk} / ET {-(Uk}

    Directory of Open Access Journals (Sweden)

    Dr. İbrahim TAŞ

    2008-05-01

    Full Text Available The {-(Uk} affix, expressing the verb result and derivingqualifications, is not seen among the the rules of vowels, rounded-unroundedat old Turkic and middle Turkic texts. But in some words, rounded -unrounded rule is seen. At this text, we investigated some of these words.

  20. SPRUCE Mashup London

    Directory of Open Access Journals (Sweden)

    Edward M. Corrado

    2013-01-01

    Full Text Available SPRUCE digital preservation mashups are a series of unique events that are being organized in the United Kingdom to bring together digital preservation practitioners and developers to work on real-world digital preservation challenges. During the 3-day event the digital preservation developers work to create practical solutions to real-world challenges the practitioners are having related to digital preservation. Meanwhile, the practitioners work to create compelling business cases for digital preservation at their institution. This article describes the SPRUCE Mashup London event held in September 2012.

  1. Clean Air for London (CLEARFLO) Final Campaign Summary

    Energy Technology Data Exchange (ETDEWEB)

    Worsnop, D. R. [Aerodyne Research, Inc., Billerica, MA (United States); Williams, L. R. [Aerodyne Research, Inc., Billerica, MA (United States); Herndon, S. C. [Aerodyne Research, Inc., Billerica, MA (United States); Dubey, M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ng, N. L. [Georgia Inst. of Technology, Atlanta, GA (United States); Thornton, J. [Univ. of Washington, Seattle, WA (United States); Knighton, B. [Montana State Univ., Bozeman, MT (United States); Coulter, R. [Argonne National Lab. (ANL), Argonne, IL (United States); Prévôt, Ash [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    2016-03-01

    This field campaign funded the participation of scientists from seven different research groups and operated over thirty instruments during the Winter Intensive Operating Period (January-February 2012) of the Clean Air for London (ClearfLo) campaign. The campaign took place at a rural site in Detling, UK, 45 kilometers southeast of central London. The primary science questions for the ClearfLo winter IOP (intensive operational periods) were: 1) “what is the urban increment of particulate matter (PM) and other pollutants in the greater London area?” and 2) “what is the contribution of solid fuel use for home heating to wintertime PM?” An additional motivation for the Detling measurements was the question of whether coatings on black carbon particles enhance absorption.

  2. The IEEE Milestone event at CERN

    CERN Multimedia

    2005-01-01

    On the initiative of its French and Swiss Sections, the IEEE has honoured CERN with an 'IEEE Milestone in the history of electricity and electronics' for the invention of the multi-wire proportional chamber in 1968. The IEEE established the Electrical Engineering Milestones programe in 1983 to honour significant achievements in the history of electrical and electronics engineering. To be designated, an achievement must be at least 25 years old, must have involved a unique solution to an engineering problem, and must have had at least regional impact. Currently there are more than  50 IEEE Milestones around the world. http://www.ieee.org/organizations/history_center/cern.html The installation and unveiling of this IEEE Milestone will provide the opportunity to emphasize the close relationship between science, technology, industry and well-being in society.  A ceremony, organised with the support of a group of IEEE members working at CERN, will be held at the CERN Globe of Science and Inn...

  3. Reform of the London Stock Exchange: the prudential issues

    Directory of Open Access Journals (Sweden)

    M.J.B. HALL

    2013-12-01

    Full Text Available In October 1986 the London Stock Exchange underwent what was termed the Big Bang. This consisted of the removal of fixed commissions on UK securities transactions, the abolition of the single capacity system, and the removal of barriers to entry to UK securities markets. The author considers five prudential issues raised by this event: monopoly power and foreign dominance, international supervisory harmonisation, capital adequacy and managerial competence, the management of 'fall out' (exit from the industry, and conflicts of interest. Three further factors are considered in detail; the regulator's approach to conflicts of interest, the regulation of financial conglomerates, and the implications of the Financial Services Act.

  4. TCP over IEEE 802.11

    Directory of Open Access Journals (Sweden)

    P. Chenna Reddy

    2009-01-01

    Full Text Available IEEE 802.11 is a widely used wireless LAN standard for medium access control. TCP is a prominent transport protocol originally designed for wired networks. TCP treats packet loss as congestion and reduces the data rate. In wireless networks packets are lost not only due to congestion but also due to various other reasons. Hence there is need for making TCP adaptable to wireless networks. Various parameters of TCP and IEEE 802.11 can be set to appropriate values to achieve optimum performance results. In this paper optimum values for various parameters of IEEE 802.11 are determined. Network simulator NS2 is used for simulation.

  5. A London shop window for PPARC industry partnership successes

    CERN Multimedia

    Neale, R

    2002-01-01

    The UK Particle Physics and Astronomy Research Council recently held a seminar in London to reveal the results of the impressive work they are doing in fostering partnerships between science and industry. They have many different types of funded programmes, the purpose of all of them is to encourage industry and entrepreneurs to both benefit from and service the requirements of particle physics science and technology (1 page).

  6. The Olympic legacy: feeding London

    NARCIS (Netherlands)

    Janssens, F.

    2012-01-01

    Over the last decades, the Olympic Games have increasingly claimed to deliver a social and economic ‘legacy’ to the host city. The 2012 Olympic Games in London have set out to deliver a legacy of better food for east London, an area perceived as ‘deprived’, with higher than average rates of obesity

  7. CERN receives prestigious Milestone recognition from IEEE

    CERN Multimedia

    2005-01-01

    At a ceremony at CERN, Mr W. Cleon Anderson, President of the Institute of Electrical and Electronics Engineers (IEEE) formally a Milestone plaque in recognition of the invention of electronic particle detectors at CERN

  8. Counting eyeballs, soundbites and 'plings': Arts participation, strategic instrumentalism and the London 2012 Cultural Olympiad

    OpenAIRE

    Gilmore, Abigail

    2012-01-01

    This article examines cultural participation, its metrics and 'drivers' as they are defined through cultural programming for the London 2012 Olympics. The meanings and interpretation of these terms are considered by examining the development of an evaluation framework for the We Play programme in the North West of England, an initiative funded by Legacy Trust UK and part of the London 2012 Cultural Olympiad. It argues that in spite of the dissonance between arts and sports within Olympics pro...

  9. Optical legacy of Imperial College London

    Science.gov (United States)

    Kidger Webb-Moore, Tina E.

    2016-10-01

    The Industrial Revolution, beginning primarily in the UK, generated an increasing need for highly skilled technical people. Throughout the 19th century, technical instruction increased dramatically and the formation of schools specializing in science and technology grew quickly. In England, there was much motivation in favour of a national prestige center for science and technology centered in London. Central among the motivating forces was Queen Victoria's husband, Prince Albert. Although there were already existing specialist science and technology institutions in major English cities, the growth of superior institutions in other countries within Europe, especially Germany and the Charlottenburg area of Berlin (e.g., the Berlin Technical High School), encouraged important English dignitaries to become more competitive with continental Europe. As a result of this strong continental motivation, several science and technology institutions were built in the south Kensington part of London during the latter half of the 19th century. Imperial College, founded at the start of the 20th century, was a culmination and consolidation of several of these 19th century English institutions. Optical science and technology was an early beneficiary of the founding of Imperial College. This paper will attempt to provide the reader with an understanding of how great was the influence of the optical section of Imperial College in the further development of the world's optical science and technology.

  10. William Blake:London VS William Wordsworth:London, 1802

    Institute of Scientific and Technical Information of China (English)

    涂莉媛

    2013-01-01

    Blake and Wordsworth are all important representatives of romantic poets. Though Blake is 13 years older than Word⁃sworth, they are both concerned with human beings, especially the lives of lower class. The poem, London and London, 1802 were created in different time, but they both reflect the miserable lives of common people during industrial revolution period to some extent. This article compares some similarities and differences between the two poems.

  11. IEEE International Symposium on Biomedical Imaging.

    Science.gov (United States)

    2017-01-01

    The IEEE International Symposium on Biomedical Imaging (ISBI) is a scientific conference dedicated to mathematical, algorithmic, and computational aspects of biological and biomedical imaging, across all scales of observation. It fosters knowledge transfer among different imaging communities and contributes to an integrative approach to biomedical imaging. ISBI is a joint initiative from the IEEE Signal Processing Society (SPS) and the IEEE Engineering in Medicine and Biology Society (EMBS). The 2018 meeting will include tutorials, and a scientific program composed of plenary talks, invited special sessions, challenges, as well as oral and poster presentations of peer-reviewed papers. High-quality papers are requested containing original contributions to the topics of interest including image formation and reconstruction, computational and statistical image processing and analysis, dynamic imaging, visualization, image quality assessment, and physical, biological, and statistical modeling. Accepted 4-page regular papers will be published in the symposium proceedings published by IEEE and included in IEEE Xplore. To encourage attendance by a broader audience of imaging scientists and offer additional presentation opportunities, ISBI 2018 will continue to have a second track featuring posters selected from 1-page abstract submissions without subsequent archival publication.

  12. Summary of inaugural meeting of the Skin Care in Organ Recipients Group, UK, held at the Royal Society of Medicine, 7 October 2004.

    Science.gov (United States)

    Eedy, D J

    2005-07-01

    This summarizes a meeting held in London at the Royal Society of Medicine, which was brought together by Prof. Fenella Wojnarowska, Professor of Dermatology at Churchill Hospital, Oxford and cofounder of Skin Care in Organ Recipients, UK (SCOR.UK).

  13. Lipoedema: the first UK patient survey.

    Science.gov (United States)

    Evans, Suzanne

    2013-04-01

    Lipoedema UK was founded in 2012 by women with lipoedema and clinicians working in the Lymphoedema Service at St George's Hospital in London. Its patron is Professor Peter Mortimer, the UK's leading Lipoedema expert, and its nurse consultant is Sandy Ellis, who diagnoses and treats many women with Lipoedema in the UK and is also the nurse consultant in the St George's team. The charity's objectives are to educate doctors, health professionals and the public about lipoedema and its symptoms, so it may be diagnosed and treated earlier.

  14. Novel Approaches to the Treatment of Cancer in London UK

    Directory of Open Access Journals (Sweden)

    Judith Black

    2015-03-01

    Full Text Available An intensive and in-depth two-day conference providing an advanced level updateKEY TOPICS TO BE COVERED:New paradigms for targeted therapiesNew anti-cancer agents ~ industry viewpointNovel approaches to the treatment of breast cancer, melanoma and pancreatic cancerDrug development and precision radiotherapyEuropean drug development initiativesMarket access to novel cancer drugsRegulatory issues in marketing authorisation of anti-cancer productsGene and cell therapies and trial endpointsDeveloping cancer vaccinesCLICK HERE for more information 

  15. CERN receives prestigious Milestone recognition from IEEE

    CERN Multimedia

    2005-01-01

    The Nobel prize winner Georges Charpak and W. Cleon Anderson, IEEE President, unveil the Milestone bronze plaques. At a ceremony on 26 September at the Globe of Science and Innovation, Mr W. Cleon Anderson, President of the Institute of Electrical and Electronics Engineers (IEEE) formally dedicated Milestone plaques recognising the invention of electronic particle detectors at CERN. The plaque were unveiled by Mr Anderson and Georges Charpak, the Nobel-prize winning inventor of wire chamber technology at CERN in 1968. The IEEE is the world's largest professional association dedicated to the advancement of technology with 365,000 individual members in over 150 countries. Established in 1983, there are currently over 60 Milestones around the world. They honour momentous achievements in the history of electrical and electronics engineering, such as the landing of the first transatlantic cable, code breaking at Bletchley Park during World War II, and the development of the Japanese Bullet train, the Tokaido Shin...

  16. Notice of Violation of IEEE Publication Principles

    DEFF Research Database (Denmark)

    Memon, Nasrullah; Qureshi, Abdul Rasool; Wiil, Uffe Kock

    2009-01-01

    Notice of Violation of IEEE Publication Principles "Novel Algorithms for Subgroup Detection in Terrorist Networks" by Nasrullah Memon, Abdul Rasool Qureshi, Uffe Kock Wiil, and David L. Hicks in the Proceedings of the 2009 International Conference on Availability, Reliability and Security, March...... 2009, pp. 572-577 After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE's Publication Principles. This paper contains significant portions of original text from the papers cited below...... be made to the following articles: "Balancing Systematic and Flexible Exploration of Social Networks" by Adam Perer, Ben Shneiderman in the IEEE Transactions on Visualization and Computer Graphics, Vol. 12, No. 5 Sept/Oct 2006, pp. 693-700 "Mining for Offender Group Detection and Story of a Police...

  17. Editorial for IEEE Transactions on Power Electronics

    DEFF Research Database (Denmark)

    Blaabjerg, Frede

    2007-01-01

    Our IEEE transactions on power electronics has had some very positive progress these past years under the leadership of Dr. Daan van Wyk. Papers have been processed efficiently both in review time and publication time. This success has spread throughout the whole power electronics community which...

  18. Editorial for IEEE Transactions on Power Electronics

    DEFF Research Database (Denmark)

    Blaabjerg, Frede

    2007-01-01

    Our IEEE transactions on power electronics has had some very positive progress these past years under the leadership of Dr. Daan van Wyk. Papers have been processed efficiently both in review time and publication time. This success has spread throughout the whole power electronics community which...

  19. Pan-London tuberculosis services: a service evaluation

    Directory of Open Access Journals (Sweden)

    Belling Ruth

    2012-07-01

    Full Text Available Abstract Background London has the largest proportion of tuberculosis (TB cases of any western European capital, with almost half of new cases drug-resistant. Prevalence varies considerably between and within boroughs with research suggesting inadequate control of TB transmission in London. Economic pressures may exacerbate the already considerable challenges for service organisation and delivery within this context. This paper presents selected findings from an evaluation of London’s TB services’ organisation, delivery, professional workforce and skill mix, intended to support development of a strategic framework for a pan-London TB service. These may also interest health service professionals and managers in TB services in the UK, other European cities and countries and in services currently delivered by multiple providers operating independently. Methods Objectives were: 1 To establish how London’s TB services are structured and delivered in relation to leadership, management, organisation and delivery, coordination, staffing and support; 2 To identify tools/models for calculating skill mix as a basis for identifying skill mix requirements in delivering TB services across London; 3 To inform a strategic framework for the delivery of a pan-London TB service, which may be applicable to other European cities. The multi-method service audit evaluation comprised documentary analysis, semi-structured interviews with TB service users (n = 10, lead TB health professionals and managers (n = 13 representing London’s five sectors and focus groups with TB nurses (n = 8 and non-London network professionals (n = 2. Results Findings showed TB services to be mainly hospital-based, with fewer community-based services. Documentary analysis and professionals’ interviews suggested difficulties with early access to services, low suspicion index amongst some GPs and restricted referral routes. Interviews indicated lack of managed

  20. Teachers' Experiences of Autonomy in Continuing Professional Development: Teacher Learning Communities in London and Hong Kong

    Science.gov (United States)

    Hargreaves, Eleanore; Berry, Rita; Lai, Y. C.; Leung, Pamela; Scott, David; Stobart, Gordon

    2013-01-01

    This paper examines teachers' experiences of autonomy as they undertook Continuing Professional Development (CPD) in the form of Teacher Learning Communities (TLCs) to develop Assessment for Learning (AfL). Participant teacher interview data were used from two parallel TLC projects, one in Hong Kong and one in London, UK. Autonomy was defined in…

  1. Teachers' Experiences of Autonomy in Continuing Professional Development: Teacher Learning Communities in London and Hong Kong

    Science.gov (United States)

    Hargreaves, Eleanore; Berry, Rita; Lai, Y. C.; Leung, Pamela; Scott, David; Stobart, Gordon

    2013-01-01

    This paper examines teachers' experiences of autonomy as they undertook Continuing Professional Development (CPD) in the form of Teacher Learning Communities (TLCs) to develop Assessment for Learning (AfL). Participant teacher interview data were used from two parallel TLC projects, one in Hong Kong and one in London, UK. Autonomy was defined in…

  2. Analyzing the Roles, Activities, and Skills of Learning Technologists: A Case Study from City University London

    Science.gov (United States)

    Fox, Olivia; Sumner, Neal

    2014-01-01

    This article reports on a case study carried out at City University London into the role of learning technologists. The article examines how the role developed by providing points of comparison with a report on the career development of learning technology staff in UK universities in 2001. This case study identified that learning technologists…

  3. Analyzing the Roles, Activities, and Skills of Learning Technologists: A Case Study from City University London

    Science.gov (United States)

    Fox, Olivia; Sumner, Neal

    2014-01-01

    This article reports on a case study carried out at City University London into the role of learning technologists. The article examines how the role developed by providing points of comparison with a report on the career development of learning technology staff in UK universities in 2001. This case study identified that learning technologists…

  4. The Wrong Side of the Tracks: Starting School in a Socially Disadvantaged London Borough

    Science.gov (United States)

    Alsford, Elizabeth; Ralephata, Andrew; Bolderson, Sarah; Curtin, Martina; Parish, Esther; Klaber, Victoria; Griffin, Sue; Nash, Lisa; Cullen, Rachel; Musoke, Brenda; Bhalla, Sangheeta; Walker, Lindsay; Duffer, Luisa; O'Sullivan, Sylvia; Knowland, Victoria; Cozens, Suzanne; McLaren, Lindsey; Camilleri, Bernard; Halil, Suzan; Furze, Rachael; Leung, Wai; O'Gorman, Ciara; Carver, Verity; Young, Dorothy; Pring, Tim

    2017-01-01

    Substantial evidence exists that social circumstances can affect children's language development. As a result many children in socially deprived areas start school with delayed language, which may persist and adversely affect their attainment. We assessed the language of children in seven reception classes in a London (UK) borough and followed the…

  5. London Tideway Tunnels: tackling London's Victorian legacy of combined sewer overflows.

    Science.gov (United States)

    Thomas, G B; Crawford, D

    2011-01-01

    It takes a few millimetres of rainfall to cause the 34 most polluting combined sewer overflows (CSOs) to discharge into the River Thames. Currently, in a typical year, spillages to the tidal reaches of the River Thames occur about 60 times, with an estimated spill volume of 39 million cubic metres. Both the UK Government and the European Union have determined that the CSO discharges have an adverse environmental impact on fish species, introduce unacceptable aesthetics and elevate the health risks for recreational users of the Thames, with a frequency of discharge which is in breach of the Urban Wastewater Treatment Directive. Studies have established that the environmental objectives can be fully met on the most cost-effective basis by completing both quality improvements to treatment works and by the provision of a storage and transfer tunnel to intercept unsatisfactory CSOs. Extensive modelling has been undertaken to develop an optimised solution. In parallel with the design development a rigorous and comprehensive site selection methodology has been established to select sites and consult stakeholders and the public on the preferred sites and scheme, with the first stage of public consultation planned for later in 2010. The London Tideway Tunnels are an essential part of the delivery of improvements to the water quality of the tidal River Thames, and this ambitious, historic scheme represents a vital strategic investment in London's infrastructure.

  6. Risk Management Supplement to IEEE-15288.1

    Science.gov (United States)

    2015-05-15

    AND MISSILE SYSTEMS CENTER TAILORING RISK MANAGEMENT SUPPLEMENT TO IEEE -15288.1 APPROVED FOR PUBLIC RELEASE...IEC- IEEE -15288: 2015, SYSTEMS AND SOFTWARE ENGINEERING — SYSTEM LIFE CYCLE PROCESSES...1 2.2. IEEE -15288.1: 2015, STANDARD FOR APPLICATION OF SYSTEMS ENGINEERING ON DEFENSE PROGRAMS

  7. Deaths of cyclists in london: trends from 1992 to 2006

    Directory of Open Access Journals (Sweden)

    Lee William E

    2010-11-01

    Full Text Available Abstract Background Cycling is an increasingly important mode of transport for environmental and health reasons. Cycling fatalities in London were previously investigated in 1994 using routinely collected data. Since then, there have been shifts in the modes of transport used, and in transport policies. We sought to replicate the previous work using data on cyclist deaths in London between 1992 and 2006, specifically investigating whether heavy goods vehicles continued to pose a threat. Methods Observational study based on analysis of time series of police road casualties data, 1992 to 2006, in London, UK. The main outcome measures were cyclists killed in road traffic collisions. Poisson regression and chi-squared test for homogeneity were used to assess time effects. Travel flow data was then used to estimate annual fatality rates per 100,000 cyclists per kilometre. Results From 1992 to 2006 there was a mean of 16 cycling fatalities per year (range 8-21. 146 deaths (60% were in inner London and 96 in outer London. There was no evidence for a decline over time (p = 0.7 other than a pronounced dip in 2004 when there were 8 fatalities. Freight vehicles were involved in 103 of 242 (43% of all incidents and the vehicle was making a left turn in over half of these (53%. The fatality rate ranged from 20.5 deaths in 1992 to 11.1 deaths in 2006 per 100,000 estimated cyclists per kilometre (rate ratio 0.54, 95% confidence interval 0.28 to 1.03. Conclusions There is little evidence fatality rates have fallen. Freight vehicles over 3.5 tonnes continue to present a disproportionate threat; they should be removed from urban roads and more appropriate means of delivery of essential goods found.

  8. Space in Pentecostal healing practices among Ghanaian migrants in London.

    Science.gov (United States)

    Krause, Kristine

    2014-01-01

    In this article I analyze different spatial practices related to Pentecostal healing, drawing on fieldwork with Pentecostal believers who have migrated from Ghana to London, UK. I explore the relationship between space and the manifestation of the Holy Spirit by looking at how points of contact with the divine are created in the personal life of people and at the sites where the casting out of demons takes place. Unlike in other spirit-centered healing traditions, the Christian Holy Spirit is not conceived of as embodied in specific places, but rather is spatially unbound. To manifest, however, the Holy Spirit requires specific spatial qualities and esthetics.

  9. Eye casualty services in London

    Science.gov (United States)

    Smith, H B; Daniel, C S; Verma, S

    2013-01-01

    The combined pressures of the European Working Time Directive, 4 h waiting time target, and growing rates of unplanned hospital attendances have forced a major consolidation of eye casualty departments across the country, with the remaining units seeing a rapid increase in demand. We examine the effect of these changes on the provision of emergency eye care in Central London, and see what wider lessons can be learned. We surveyed the managers responsible for each of London's 8 out-of-hours eye casualty services, analysed data on attendance numbers, and conducted detailed interviews with lead clinicians. At London's two largest units, Moorfields Eye Hospital and the Western Eye Hospital, annual attendance numbers have been rising at 7.9% per year (to 76 034 patients in 2010/11) and 9.6% per year (to 31 128 patients in 2010/11), respectively. Using Moorfields as a case study, we discuss methods to increase capacity and efficiency in response to this demand, and also examine some of the unintended consequences of service consolidation including patients travelling long distances to geographically inappropriate units, and confusion over responsibility for out-of-hours inpatient cover. We describe a novel ‘referral pathway' developed to minimise unnecessary travelling and delay for patients, and propose a forum for the strategic planning of London's eye casualty services in the future. PMID:23370420

  10. London´s erotic masterpiece

    DEFF Research Database (Denmark)

    Kerchlango, Jørg

    2004-01-01

    Londoners call it the erotic ghurkin. Architects proclaim Norman Foster´s new building a revolutionary masterwork......Londoners call it the erotic ghurkin. Architects proclaim Norman Foster´s new building a revolutionary masterwork...

  11. Impact of IEEE 1609.4 channel switching on the IEEE 802.11p beaconing performance

    NARCIS (Netherlands)

    Eenennaam, van Martijn; Venis, van de Anne; Karagiannis, Georgios

    2012-01-01

    The IEEE 802.11p Wireless Access in Vehicular Environment (WAVE) protocol can only transmit packets on one channel. To support multi-channel operations, channel switching procedures have been proposed in IEEE 1609.4. This paper provides an analysis of the beaconing performance of IEEE 802.11p when t

  12. Olympics Legacy: the London Olympics 2012

    OpenAIRE

    2010-01-01

    The reasons for proposing a London 2012 bid are outlined in the light of London city planning over the past sixty years. The processes influencing the bid for the London 2012 Olympics are investigated in respect of the lessons from Barcelona and Sydney. The role of environmental and landscape improvement is examined and the importance of legacy is described and analysed. The cost of Olympiads since Sydney 2000 are described and compared. Then progress of the London 2012 Olympics developmen...

  13. Incremental validity of WISC-IV(UK) factor index scores with a referred Irish sample: predicting performance on the WIAT-II(UK.).

    Science.gov (United States)

    Canivez, Gary L; Watkins, Marley W; James, Trevor; Good, Rebecca; James, Kate

    2014-12-01

    Subtest and factor scores have typically provided little incremental predictive validity beyond the omnibus IQ score. This study examined the incremental validity of Wechsler Intelligence Scale for Children - Fourth UK Edition (WISC-IV(UK) ; Wechsler, 2004a, Wechsler Intelligence Scale for Children - Fourth UK Edition, Harcourt Assessment, London, UK) and factor index scores in predicting academic achievement on the Wechsler Individual Achievement Test - Second UK Edition (WIAT-II(UK) ; Wechsler, 2005a, Wechsler Individual Achievement Test-Second UK Edition, Pearson, London, UK), beyond that predicted by the WISC-IV(UK) FSIQ. The sample included 1,014 Irish children (ages 6-0 to 16-9) who were referred for evaluation of learning difficulties. Hierarchical multiple regression analyses were used with the WISC-IV(UK) FSIQ (Block 1) and factor index scores (Block 2) as predictors and WIAT-II(UK) subtest and composite scores as dependent variables. The WISC-IV(UK) FSIQ accounted for statistically significant and generally large portions of WIAT-II(UK) subtest and composite score variance. WISC-IV(UK) factor index scores combined to provide statistically significant increments in prediction of most WIAT-II(UK) subtest and composite scores over and above the FSIQ; however, the effect sizes were mostly small as previously observed (i.e., Canivez, 2013a, Psychol. Assess., 25, 484; Glutting et al., 2006, J. Spec. Educ., 40, 103; Nelson et al., 2013, Psychol. Assess., 25, 618). Individually, the WISC-IV(UK) factor index scores provided small unique contributions to predicting WIAT-II(UK) scores. This, in combination with studies of apportioned variance from bifactor confirmatory factor analysis (Watkins et al., 2013, Int. J. Sch. Educ. Psychol., 1, 102), indicated that the WISC-IV(UK) FSIQ should retain the greatest weight in WISC-IV(UK) interpretation. © 2014 The British Psychological Society.

  14. Construct Validity of the Wechsler Intelligence Scale for Children-Fourth UK Edition with a Referred Irish Sample: Wechsler and Cattell-Horn-Carroll Model Comparisons with 15 Subtests

    Science.gov (United States)

    Canivez, Gary L.; Watkins, Marley W.; Good, Rebecca; James, Kate; James, Trevor

    2017-01-01

    Background: Irish educational psychologists frequently use the Wechsler Intelligence Scale for Children-Fourth UK Edition (WISC-IV[superscript UK]; Wechsler, 2004, Wechsler Intelligence Scale for Children-Fourth UK Edition, London, UK, Harcourt Assessment) in clinical assessments of children with learning difficulties. Unfortunately, reliability…

  15. Specialty Engineering Supplement to IEEE-15288.1

    Science.gov (United States)

    2015-05-15

    MISSILE SYSTEMS CENTER TAILORING SPECIALTY ENGINEERING SUPPLEMENT TO IEEE -15288.1 APPROVED FOR PUBLIC RELEASE; DISTRIBUTION...IS UNLIMITED 1 Tailoring of IEEE 15288.1: Specialty Engineering Supplement. 1. Intent of this Tailoring Document This tailoring document is...historically deemed valuable to mission assurance/success of high-reliability space systems. This tailoring document supplements IEEE 15288.1-2015 Annex E

  16. Knowledge Construction and Personal Relationship: Insights about a UK University Mentoring and Coaching Service

    Science.gov (United States)

    Hargreaves, Eleanore

    2010-01-01

    This article examines interview data from 12 mentors/coaches and eight of their clients in order to explore a mentoring and coaching service among UK university staff. Both mentors/coaches and clients were administrative or academic employees of the Institute of Education or affiliated colleges at London University, UK. Their roles related to the…

  17. Patterns in Payout Policy and Payout Channel Choice of UK Firms in the 1990s

    NARCIS (Netherlands)

    Renneboog, L.D.R.; Trojanowski, G.

    2005-01-01

    The paper examines the payout policy of UK firms listed on the London Stock Exchange during the 1990s.We complement the existing payout literature studies by analyzing jointly the trends in dividends and share repurchases.Unlike in the US, we find that, in the UK, firms do not demonstrate a

  18. Patterns in Payout Policy and Payout Channel Choice of UK Firms in the 1990s

    NARCIS (Netherlands)

    Renneboog, L.D.R.; Trojanowski, G.

    2005-01-01

    The paper examines the payout policy of UK firms listed on the London Stock Exchange during the 1990s.We complement the existing payout literature studies by analyzing jointly the trends in dividends and share repurchases.Unlike in the US, we find that, in the UK, firms do not demonstrate a decreasi

  19. Proceedings of IEEE Machine Learning for Signal Processing Workshop XVI

    DEFF Research Database (Denmark)

    Larsen, Jan

    These proceedings contains refereed papers presented at the sixteenth IEEE Workshop on Machine Learning for Signal Processing (MLSP'2006), held in Maynooth, Co. Kildare, Ireland, September 6-8, 2006. This is a continuation of the IEEE Workshops on Neural Networks for Signal Processing (NNSP...... with sponsorship of the IEEE Signal Processing Society. Following the practice started three years ago, the bound volume of the proceedings is going to be published by IEEE following the Workshop, and we are pleased to offer to conference attendees the proceeding in a CDROM electronic format, which maintains...

  20. Proceedings of IEEE Machine Learning for Signal Processing Workshop XVI

    DEFF Research Database (Denmark)

    Larsen, Jan

    These proceedings contains refereed papers presented at the sixteenth IEEE Workshop on Machine Learning for Signal Processing (MLSP'2006), held in Maynooth, Co. Kildare, Ireland, September 6-8, 2006. This is a continuation of the IEEE Workshops on Neural Networks for Signal Processing (NNSP...... with sponsorship of the IEEE Signal Processing Society. Following the practice started three years ago, the bound volume of the proceedings is going to be published by IEEE following the Workshop, and we are pleased to offer to conference attendees the proceeding in a CDROM electronic format, which maintains...

  1. Market Maker V Automated Order Book Markets: UK Evidence

    OpenAIRE

    Creswell, Phil

    2003-01-01

    The London Stock Exchange operates two separate trading platforms for UK equities: an automated limit order book (SETS) and a multiple dealer market (SEAQ). This paper examines the relative efficiency of the different market structures, by comparing the spread experienced by traders in each market.

  2. IEEE北京分会召开IEEE Fellow座谈会并举力IEEE Fellow讲坐

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ 2006年8月29日下午,IEEE北京分会(Beijing Section),在中国科学院自动化研究所召开IEEE Fellow座谈会.座谈会的主要议题是如何发挥我国IEEE Fellow的作用.会议由IEEE北京分会现任主席谭铁牛博士(自动化研究所所长,IEEE Fellow)主持,他向到会的IEEE Fellow,介绍了IEEE北京分会2006-2007年度的工作计划设想.

  3. IEEE 802.11 ECG monitoring system.

    Science.gov (United States)

    Tejero-Calado, Juan; Lopez-Casado, Carmen; Bernal-Martin, Antonio; Lopez-Gomez, Miguel; Romero-Romero, Marco; Quesada, Guillermo; Lorca, Julio; Rivas, Ramon

    2005-01-01

    New wireless technologies make possible the implementation of high level integration wireless devices which allow the replacement of traditional large wired monitoring devices. This kind of devices favours at-home hospitalization, reducing the affluence to sanitary assistance centers to make routine controls. This fact causes a really favourable social impact, especially for elder people, rural-zone inhabitant, chronic patients and handicapped people. Furthermore, it offers new functionalities to physicians and will reduce the sanitary cost. Among these functionalities, biomedical signals can be sent to other devices (screen, PDA, PC...) or processing centers, without restricting the patients' mobility. The aim of this project is the development and implementation of a reduced size multi-channel electrocardiograph based on IEEE 802.11, which allows wireless monitoring of patients, and the insertion of the information into the TCP/IP Hospital network.

  4. 7th IEEE International Conference Intelligent Systems

    CERN Document Server

    Atanassov, KT; Doukovska, L; Hadjiski, M; Jotsov, V; Kacprzyk, J; Kasabov, N; Sotirov, S; Szmidt, E; Zadrożny, S; Filev, D; Jabłkowski, J; Kacprzyk, J; Krawczak, M; Popchev, I; Rutkowski, L; Sgurev, V; Sotirova, E; Szynkarczyk, P

    2015-01-01

    This two volume set of books constitutes the proceedings of the 2014  7th IEEE International Conference Intelligent Systems (IS), or IEEE IS’2014 for short, held on September 24‐26, 2014 in Warsaw, Poland. Moreover, it contains some selected papers from the collocated IWIFSGN'2014-Thirteenth International Workshop on Intuitionistic Fuzzy Sets and Generalized Nets.The conference was organized by the Systems Research Institute, Polish Academy of Sciences, Department IV of Engineering Sciences, Polish Academy of Sciences, and Industrial Institute of Automation and Measurements - PIAP.The papers included in the two proceedings volumes have been subject to a thorough review process by three highly qualified peer reviewers.Comments and suggestions from them have considerable helped improve the quality of the papers but also the division of the volumes into parts, and assignment of the papers to the best suited parts.  

  5. 2012 IEEE Vehicular Networking Conference (VNC): Demo Summaries

    NARCIS (Netherlands)

    Altintas, Onur; Chen, Wai; Heijenk, Geert; Oh, Hyun Seo; Chung, Jong-Moon; Dressler, Falko; Kargl, Frank; Pau, Giovanni; Schoch, Elmar

    2012-01-01

    Preface Last year’s edition of IEEE VNC in Amsterdam included a very successful demonstration session in its program. Therefore, demonstrations are again part of the program of IEEE VNC 2012 in Seoul, Republic of Korea. Demonstrations play an important role to expose the research community to practi

  6. IEEE International Workshop on Machine Learning for Signal Processing: Preface

    DEFF Research Database (Denmark)

    Tao, Jianhua

    The 21st IEEE International Workshop on Machine Learning for Signal Processing will be held in Beijing, China, on September 18–21, 2011. The workshop series is the major annual technical event of the IEEE Signal Processing Society's Technical Committee on Machine Learning for Signal Processing...

  7. IEEE Standard Dictionary of Electrical and Electronics Terms.

    Science.gov (United States)

    Institute of Electrical and Electronics Engineers, Inc., New York, NY.

    This dictionary, prepared by the Institute of Electrical and Electronics Engineers, Inc. (IEEE), defines 13,000 technical words from every area of electrical and electronics engineering. The dictionary contains hundreds of new terms as well as revisions of earlier ones. Each definition is an official standard of IEEE. The definitions are arranged…

  8. IEEE International Workshop on Machine Learning for Signal Processing: Preface

    DEFF Research Database (Denmark)

    Tao, Jianhua

    The 21st IEEE International Workshop on Machine Learning for Signal Processing will be held in Beijing, China, on September 18–21, 2011. The workshop series is the major annual technical event of the IEEE Signal Processing Society's Technical Committee on Machine Learning for Signal Processing...

  9. IEEE Standard Dictionary of Electrical and Electronics Terms.

    Science.gov (United States)

    Institute of Electrical and Electronics Engineers, Inc., New York, NY.

    This dictionary, prepared by the Institute of Electrical and Electronics Engineers, Inc. (IEEE), defines 13,000 technical words from every area of electrical and electronics engineering. The dictionary contains hundreds of new terms as well as revisions of earlier ones. Each definition is an official standard of IEEE. The definitions are arranged…

  10. Proceedings of IEEE Machine Learning for Signal Processing Workshop XV

    DEFF Research Database (Denmark)

    Larsen, Jan

    These proceedings contains refereed papers presented at the Fifteenth IEEE Workshop on Machine Learning for Signal Processing (MLSP’2005), held in Mystic, Connecticut, USA, September 28-30, 2005. This is a continuation of the IEEE Workshops on Neural Networks for Signal Processing (NNSP) organized...... by the NNSP Technical Committee of the IEEE Signal Processing Society. The name of the Technical Committee, hence of the Workshop, was changed to Machine Learning for Signal Processing in September 2003 to better reflect the areas represented by the Technical Committee. The conference is organized...... by the Machine Learning for Signal Processing Technical Committee with sponsorship of the IEEE Signal Processing Society. Following the practice started two years ago, the bound volume of the proceedings is going to be published by IEEE following the Workshop, and we are pleased to offer to conference attendees...

  11. Proceedings of IEEE Machine Learning for Signal Processing Workshop XV

    DEFF Research Database (Denmark)

    Larsen, Jan

    These proceedings contains refereed papers presented at the Fifteenth IEEE Workshop on Machine Learning for Signal Processing (MLSP’2005), held in Mystic, Connecticut, USA, September 28-30, 2005. This is a continuation of the IEEE Workshops on Neural Networks for Signal Processing (NNSP) organized...... by the NNSP Technical Committee of the IEEE Signal Processing Society. The name of the Technical Committee, hence of the Workshop, was changed to Machine Learning for Signal Processing in September 2003 to better reflect the areas represented by the Technical Committee. The conference is organized...... by the Machine Learning for Signal Processing Technical Committee with sponsorship of the IEEE Signal Processing Society. Following the practice started two years ago, the bound volume of the proceedings is going to be published by IEEE following the Workshop, and we are pleased to offer to conference attendees...

  12. Performance comparison of IEEE 802.11g and IEEE 802.11n in the presence of interference from 802.15.4 networks

    OpenAIRE

    Masood, Syed Haani

    2013-01-01

    In this paper we compare the packet error rate (PER) and maximum throughput of IEEE 802.11n and IEEE 802.11g under interference from IEEE 802.15.4 by using MATLAB to simulate the IEEE PHY for 802.11n and 802.11g networks.

  13. Performance comparison of IEEE 802.11g and IEEE 802.11n in the presence of interference from 802.15.4 networks

    OpenAIRE

    Masood, Syed Haani

    2013-01-01

    In this paper we compare the packet error rate (PER) and maximum throughput of IEEE 802.11n and IEEE 802.11g under interference from IEEE 802.15.4 by using MATLAB to simulate the IEEE PHY for 802.11n and 802.11g networks.

  14. Active Channel Reservation for Coexistence Mechanism (ACROS) for IEEE 802.15.4 and IEEE 802.11

    Science.gov (United States)

    Shin, Soo Young; Woo, Dong Hyuk; Lee, Jong Wook; Park, Hong Seong; Kwon, Wook Hyun

    In this paper, a coexistence mechanism between IEEE 802.15.4 and IEEE 802.11b, Active Channel Reservation for cOexiStence (ACROS), is proposed. The key idea underlining ACROS is to reserve the channel for IEEE 802.15.4 transmission, where IEEE 802.11 transmissions are forbidden. The request-to-send (RTS)/clear-to send (CTS) mechanism within IEEE 802.11 is used to reserve a channel. The proposed ACROS mechanism is implemented into a PC based prototype. The embedded version of ACROS is also developed to mitigate the timing drift problem in the PC-based ACROS. The efficiency of ACROS is shown using the throughput and packet error rate achieved in actual experiments.

  15. ATLAS Virtual Visit London-20-08-2014

    CERN Multimedia

    2014-01-01

    Working at the highest energy particle accelerator in the world, a group of scientists gathers each year to discuss the science and discovery potential of extremely energetic and complex phenomena that might emerge from the proton collisions at the LHC. The BOOST Conference of 2014 is hosted by the UCL HEP Group at the heart of London, and features an evening of particle physics, including an introduction to the Higgs and the Large Hadron Collider, a virtual visit to CERN hosted by David Miller of Chicago University, a talk by TEDx speaker Lily Asquith (Argonne National Lab/Sussex Uni) on sonification of LHC data, and a question and answer session! More information can be found on the conference website at: http://www.hep.ucl.ac.uk/boost2014/.

  16. Optimum design methodologies for pile foundations in London

    Directory of Open Access Journals (Sweden)

    Christos Letsios

    2014-12-01

    Full Text Available Given the importance of pile foundations in geotechnical engineering for supporting high-significance structures such as bridges, high-rise buildings, power plant stations, offshore platforms and museums, it becomes a necessity to find the best pile foundation design in terms of performance and economy. The number of piles required might exceed several hundreds or even thousands while the pile foundation cost might exceed 20% of the construction cost of the superstructure. In this work the problem of finding optimized designs of pile foundations is examined and is performed in accordance to two design code recommendations, namely Eurocode 7 and DIN 4014. The proposed structural optimization procedure is implemented in two real-world cases both located in London, UK in order to assess the efficiency of the proposed design formulation.

  17. Ethnopharmacy of Turkish-speaking Cypriots in Greater London.

    Science.gov (United States)

    Yöney, Ahmet; Prieto, José M; Lardos, Andreas; Heinrich, Michael

    2010-05-01

    For centuries, in the Eastern Mediterranean region, medicinal plant use has been widely accepted as a treatment method for both minor and major diseases. Although some knowledge exists on the use of such medicinal plants within the Greek Cypriot culture and considerable information is available on various regions in Turkey, no detailed ethnopharmaceutical or ethnobotanical studies exist on Turkish-speaking Cypriots (TSC) both in Cyprus and within one of the largest TSC migrant communities in London, UK. Semi-structured interviews with members of the TSC community in London were conducted by using a questionnaire consisting both of open and closed questions. Open questions were aimed at identifying herbs, spices, medicinal plants and their uses. Also, graded questions were used to define informants' opinions as a quantitative parameter, constructing a statistical basis. A wide range of therapeutic claims were recorded, including 13 chronic illnesses within 85 different plant species, of which 18 were cited more than 10 times. The most frequently mentioned species were Mentha spicata, Salvia fruticosa and Pimpinella anisum. The plants recorded are frequently based on knowledge derived from Turkish-Cypriot traditions, but many examples of medicinal plants with a use based on UK or general western herbal medical traditions were also recorded. Informants highlighted the risk of knowledge loss in younger generations and thus this study serves as a repository of knowledge for use in the future. Due to a lack of knowledge about such usages in the healthcare professions, our study also highlights the need to develop information sources for use by healthcare practitioners in order to raise awareness about benefits and risks of such medical and health food products.

  18. Application of IEEE 1588 in LXI testing system%LXI测试系统中IEEE 1588的应用

    Institute of Scientific and Technical Information of China (English)

    Bob Rennard; Agilent Technologies

    2009-01-01

    LXI联盟是主要测试和测量厂商的一个组织,负责开拓基于LAN通信和融合IEEE 1588的模块化、分布式的仪器体系结构.本文将概要说明与 IEEE 1588相关的LXI规范,以及如何在基于LXI测试和测最系统中用IEEE 1588建立时基.

  19. Clinical epidemiology of epithelial ovarian cancer in the UK

    Directory of Open Access Journals (Sweden)

    Doufekas K

    2014-05-01

    Full Text Available Konstantinos Doufekas, Adeola OlaitanDepartment of Gynaecological Oncology, University College London Hospitals, London, UKAbstract: Epithelial ovarian cancer is the fifth commonest cancer among women and the leading cause of gynecological cancer death in the UK. Most women present with advanced disease, mainly because the nonspecific nature of the symptoms lead to diagnostic delays. Recent data have shown a fall in ovarian cancer mortality rates in the UK, but rates are still higher when compared to other European countries or the USA. In addition, surgeons in the UK achieve on average lower optimal surgical cytoreduction rates in patients with advanced ovarian cancer. Despite a wealth of information on epidemiological risk factors, the pathogenesis of epithelial ovarian cancer remains largely unknown. This review presents the most recent data on incidence, mortality, and survival for epithelial ovarian cancer in the UK. Time trends, trends by age, international comparisons, and regional variation in incidence, survival, and mortality are presented within the context of a major reorganization of cancer services that took place in the UK over 10 years ago. Centralization of cancer services has meant that women with ovarian cancer receive treatment in specialist Cancer Centers.Keywords: ovarian, cancer, epidemiology, UK, incidence, survival

  20. Central and East European migrant men who have sex with men in London: a comparison of recruitment methods

    Directory of Open Access Journals (Sweden)

    Gerry Christopher J

    2011-05-01

    Full Text Available Abstract Background Following the expansion of the European Union, there has been a large influx of Central and East European (CEE migrants to the UK. CEE men who have sex with men (MSM represent a small minority within this population that are none-the-less important to capture in sexual health research among the CEE migrant community. This paper examines the feasibility of recruiting CEE MSM for a survey of sexual behaviour in London using respondent driven sampling (RDS, via gay websites and in GUM clinics. Methods We sought CEE MSM to start RDS chain referral among GUM clinic attendees, our personal contacts and at gay events and venues in central London. We recruited CEE MSM (n = 485 via two popular websites for gay men in Britain (March-May 2009 and at two central London GUM clinics (n = 51 (July 2008-March 2009. Results We found seventeen men who knew other CEE MSM in London and agreed to recruit contacts into the study. These men recruited only three men into the study, none of whom recruited any further respondents, and RDS was abandoned after 7 months (July 2008-January 2009. Half of the men that we approached to participate in RDS did not know any other CEE MSM in London. Men who agreed to recruit contacts for RDS were rather more likely to have been in the UK for more than one year (94.1% vs 70.0%, p = 0.052. Men recruited through gay websites and from GUM clinics were similar. Conclusions The Internet was the most successful method for collecting data on sexual risk behaviour among CEE MSM in London. CEE MSM in London were not well networked. RDS may also have failed because they did not fully understand the procedure and/or the financial incentive was not sufficient motivation to take part.

  1. A Migrant Culture on Display: The French Migrant and French Gastronomy in London (19th – 21st centuries)

    OpenAIRE

    Kelly, D.

    2016-01-01

    The large contemporary French migrant population – estimated by the French Consulate at around 300,000–400,000 in the UK, the majority living in London and the South-East – remains ‘absent’ from studies on migration, and, in a study of migrant food history in Britain, is considered not to have left traces as a migrant community. Over the centuries, the presence of various French communities in London has varied significantly as far as numbers are concerned, but what does not change is their s...

  2. A COMPARISON OF IMPROVED AODV ROUTING PROTOCOL BASED ON IEEE 802.11 AND IEEE 802.15.4

    OpenAIRE

    2009-01-01

    Recently, wireless network industry for the ubiquitous generation is growing quickly. Especially, IEEE 802.15.4 is one of special issues of the networking technology for sensor network. Then, many researchers are studying it for enhanced performance. But many researchers are not focusing on developing routing protocol. So we had proposed improved AODV routing protocol in previous research. But it had studied about performance analysis based on IEEE 802.11. In this paper, we proposed improved ...

  3. Delay Analysis of GTS Bridging between IEEE 802.15.4 and IEEE 802.11 Networks for Healthcare Applications.

    Science.gov (United States)

    Misić, Jelena; Sherman Shen, Xuemin

    2009-01-01

    We consider interconnection of IEEE 802.15.4 beacon-enabled network cluster with IEEE 802.11b network. This scenario is important in healthcare applications where IEEE 802.15.4 nodes comprise patient's body area network (BAN) and are involved in sensing some health-related data. BAN nodes have very short communication range in order to avoid harming patient's health and save energy. Sensed data needs to be transmitted to an access point in the ward room using wireless technology with higher transmission range and rate such as IEEE 802.11b. We model the interconnected network where IEEE 802.15.4-based BAN operates in guaranteed time slot (GTS) mode, and IEEE 802.11b part of the bridge conveys GTS superframe to the 802.11b access point. We then analyze the network delays. Performance analysis is performed using EKG traffic from continuous telemetry, and we discuss the delays of communication due the increasing number of patients.

  4. Simulasi Kinerja Jaringan Nirkabel IEEE-802.11a dan IEEE-802.11g Menggunakan NS-2

    Directory of Open Access Journals (Sweden)

    Helm Fitriawan

    2014-03-01

    Full Text Available Wireless network uses transmission media based on radio waves. This type of networks is mainly useddue to its efficiency and mobility in data exchanging. This paper reports the modeling and simulation of wirelessnetworks based on Cisco Aironet 1130ag access point devices with IEEE 802.11a and IEEE 802.11g standards. Themodeling and simulation are performed using network simulator version 2 (NS-2 that is installed on operationsystem Linux Ubuntu v.10.10. The NS-2 is commonly used and works well in numerous types of network simulation. From simulation, we obtain quality of service parameters by employing several simulation scenarios in terms ofnumber of nodes, distances, and packet data sizes. It can be concluded from simulation results that the IEEE 802.11gnetworks transfer data with better quality than those of IEEE 802.11a networks.  Furthermore, the IEEE 802.11gnetworks provide a higher throughput, with smaller amount of delay and packet loss percentage compared to thoseof IEEE 802.11a networks.

  5. Mind the gap: financial London and the regional class pay gap.

    Science.gov (United States)

    Friedman, Sam; Laurison, Daniel

    2017-09-01

    The hidden barriers, or 'gender pay gap', preventing women from earning equivalent incomes to men is well documented. Yet recent research has uncovered that, in Britain, there is also a comparable class-origin pay gap in higher professional and managerial occupations. So far this analysis has only been conducted at the national level and it is not known whether there are regional differences within the UK. This paper uses pooled data from the 2014 and 2015 Labour Force Survey (N = 7,534) to stage a more spatially sensitive analysis that examines regional variation in the class pay gap. We find that this 'class ceiling' is not evenly spatially distributed. Instead it is particularly marked in Central London, where those in high-status occupations who are from working-class backgrounds earn, on average, £10,660 less per year than those whose parents were in higher professional and managerial employment. Finally, we inspect the Capital further to reveal that the class pay gap is largest within Central London's banking and finance sector. Challenging policy conceptions of London as the 'engine room' of social mobility, these findings suggest that class disadvantage within high-status occupations is particularly acute in the Capital. The findings also underline the value of investigating regional differences in social mobility, and demonstrate how such analysis can unravel important and previously unrecognized spatial dimensions of class inequality. © London School of Economics and Political Science 2017.

  6. The Influence of Green Infrastructure on Urban Resilience in Greater London

    Science.gov (United States)

    Oh, Yukyung

    2017-04-01

    High population densities and diverse economic activities in urban areas create social issues as well as a range of environmental impacts including air pollution, soil contamination, loss of biodiversity and health problems (Alberti et al., 2003; Dobbs, Escobedo, & Zipperer, 2011; Grimm et al., 2008). The concept of urban resilience has been used for increasing the capacity of the entities and players to adapt to rapid changes, and urban green spaces play a crucial role in increasing urban resilience. Greater London has a good case for increasing urban green spaces and resilience under the London Plan. The relevance of urban open spaces and several socioeconomic indicators would provide researchers and policy makers with the information for managing green coverage. The correlation analysis of two quantitative data such as open space and socioeconomic data of Greater London was conducted with SPSS. The data for open spaces in Greater London was gained through Greenspace Information for Greater London. The data was converted from vector to raster in Geographic Information System (GIS), so as to calculate landscape metrics for open spaces in Greater London through a spatial pattern analysis program, FRAGSTATS 4.2. The socioeconomic data was obtained from "London Borough Profile", London Datastore. In addition, data on total carbon emissions from Industry and Commercial, Domestic, Transport, LULUCF Net Emissions, and per capita emissions were gained from UK local authority and regional carbon dioxide emissions national statistics: 2005-2014 released from Department of Energy and Climate Change. The indicators from open spaces are total area of open space and patch density or contagion of open spaces. The latter indicator allows to figure out the level of fragmentation of open spaces. The socioeconomic indicators cover number of jobs by workplace, jobs density, crime rates per thousand population, and several wellbeing indicators such as life satisfaction

  7. Environmental health impacts: occurrence, exposure and significance, Lancaster University, UK, 9-10 September 2003.

    Science.gov (United States)

    Martin, Francis L; Semple, Kirk T

    2004-09-01

    Speakers: John Ashby (Syngenta CTL, UK), Peter A. Behnisch (Eurofins GfA, Germany), Paul L. Carmichael (Unilever Colworth, UK), Curtis C.Harris (National Cancer Institute, USA), Kevin C. Jones (Lancaster University, UK), Andreas Kortenkamp (School of Pharmacy, London, UK), Caroline J. Langdon (Reading University, UK), Anthony M. Lynch (GlaxoSmithKline, UK), Francis L. Martin (Lancaster University, UK), Trevor J. McMillan (Lancaster University, UK), David H. Phillips (Institute of Cancer Research, UK), Huw J. Ricketts (University of Cardiff, UK), Michael N. Routledge (University of Leeds, UK), J. Thomas Sanderson (Utrecht University, The Netherlands) and Kirk T. Semple (Lancaster University, UK) The effects of many environmental exposures to either single contaminants or to mixtures still remain to be properly assessed in ecotoxicological and human toxicological settings. Such assessments need to be carried out using relevant biological assays. On a mechanistic basis, future studies need to be able to extrapolate exposure to disease risk. It is envisaged that such an approach would lead to the development of appropriate strategies to either reduce exposures or to initiate preventative measures in susceptible individuals or populations. To mark the opening of a new Institute, the Lancaster Environmental Centre, an environmental health workshop was held over 2 days (9-10 September 2003) at Lancaster University, UK. The fate, behaviour and movement of chemicals in the environment, together with environmental exposures and human health, biomarkers of such exposures, hormone-like compounds and appropriate genetic toxicology methodologies, were discussed.

  8. A Kennedy Space Center implementation of IEEE 1451

    Science.gov (United States)

    Oostdyk, Rebecca L.; Mata, Carlos T.; Perotti, José M.; Lucena, Angel R.; Mullenix, Pamela A.

    2006-05-01

    To meet the demand for more reliable sensory data, longer sensor calibration cycles, and more useful information for operators at NASA's Kennedy Space Center (KSC), NASA's Instrumentation Branch and ASRC's Advanced Electronics and Technology Development Laboratory at the KSC are developing custom intelligent sensors based on the IEEE 1451 family of smart-sensor standards. The KSC intelligent sensors are known as Smart Networked Elements (SNEs), and each SNE includes transducers and their associated Transducer Electronic Data Sheets (TEDS), signal conditioning, analog-to-digital conversion, software algorithms for performing health checks on the data, and a network connection for sending data to other SNEs and higher-level systems. The development of the SNE has led to the definition of custom architectures, protocols, IEEE 1451 implementations, and TEDS, which are presented in this paper. The IEEE 1451 standards describe the architecture, message formats, software objects, and communication protocols within the smart sensor. Because of the standard's complexity, KSC has simplified the IEEE 1451 architecture and narrowed the scope of software objects to be included in the SNE to create a "light" IEEE 1451 implementation, and has used the manufacturer-defined TEDS to customize the SNE with health indicators. Furthermore, KSC has developed a protocol that allows the SNEs to communicate over an Ethernet network while reducing bandwidth requirements.

  9. What factors influence UK medical students’ choice of foundation school?

    Directory of Open Access Journals (Sweden)

    Miah S

    2017-04-01

    Full Text Available Saiful Miah,1,2 Karl H Pang,3 Wayne Rebello,4 Zoe Rubakumar,4 Victoria Fung,5 Suresh Venugopal,6 Hena Begum4 1Division of Surgery and Interventional science, University College London, London, UK; 2Department of Urology, Charing Cross Hospital Imperial College Healthcare NHS Trust, London, UK; 3Academic Urology Unit, University of Sheffield, Sheffield, UK; 4Medical School, University of Sheffield, Sheffield, UK; 5Department of Plastic Surgery, Royal Hallamshire Hospital, Sheffield, UK; 6Department of Urology, Chesterfield Royal Infirmary, Chesterfield, UK Background: We aimed to identify the factors influencing UK medical student applicants’ choice of foundation school. We also explored the factors that doctors currently approaching the end of their 2-year program believe should be considered. Methods: A cross-sectional study was conducted during the 2013–2014 academic year. An online questionnaire was distributed to 2092 final-year medical students from nine UK medical schools and 84 foundation year-2 (FY2 doctors from eight foundation schools. Participants were asked to rank their top 3 from a list of 12 factors that could potentially influence choice of foundation school on a 5-point Likert scale. Collated categorical data from the two groups were compared using a chi-square test with Yates correction. Results: Geographic location was overwhelmingly the most important factor for medical students and FY2 doctors with 97.2% and 98.8% in agreement, respectively. Social relationships played a pivotal role for medical student applicants. Clinical specialties within the rotations were of less importance to medical students, in comparison to location and social relationships. In contrast, FY2 doctors placed a significantly greater importance on the specialties undertaken in their 2-year training program, when compared to medical students (chi-square; p=0.0001. Conclusion: UK medical schools should make their foundation program applicants aware

  10. Proceedings of the Seventh International Conference on Educational Data Mining (EDM) (7th, London, United Kingdom, July 4-7, 2014)

    Science.gov (United States)

    Stamper, John, Ed.; Pardos, Zachary, Ed.; Mavrikis, Manolis, Ed.; McLaren, Bruce M., Ed.

    2014-01-01

    The 7th International Conference on Education Data Mining held on July 4th-7th, 2014, at the Institute of Education, London, UK is the leading international forum for high-quality research that mines large data sets in order to answer educational research questions that shed light on the learning process. These data sets may come from the traces…

  11. The Dutch and British public debate on Islam: responses to the killing of Theo van Gogh and the London bombings compared

    NARCIS (Netherlands)

    Vellenga, S.

    2008-01-01

    Since the beginning of this century, Islam has become the subject of an intensive debate within Europe. Major triggers of this debate were, in the Netherlands, the assassination of the filmmaker Theo van Gogh on 2 November 2004 and, in the UK, the London bombings on 7 July 2005. Both violent actions

  12. The UK Casting Industry

    Institute of Scientific and Technical Information of China (English)

    Jincheng Liu

    2006-01-01

    The casting production in the UK in 2004 is presented and analysed. The UK casting industry has played an important role in world casting and manufacturing production. However recent years the rapid development of some developing countries has been shifting the casting production from the western industrialized countries including the UK. The UK casting industry and associated research and technology organizations, universities have been working together very hard to face the serious competition to make the UK casting industry have a sustainable future. The UK casting industry remains strong and plays an important role in world casting and manufacturing production.

  13. Implicit Block ACK Scheme for IEEE 802.11 WLANs

    Science.gov (United States)

    Sthapit, Pranesh; Pyun, Jae-Young

    2016-01-01

    The throughput of IEEE 802.11 standard is significantly bounded by the associated Medium Access Control (MAC) overhead. Because of the overhead, an upper limit exists for throughput, which is bounded, including situations where data rates are extremely high. Therefore, an overhead reduction is necessary to achieve higher throughput. The IEEE 802.11e amendment introduced the block ACK mechanism, to reduce the number of control messages in MAC. Although the block ACK scheme greatly reduces overhead, further improvements are possible. In this letter, we propose an implicit block ACK method that further reduces the overhead associated with IEEE 802.11e’s block ACK scheme. The mathematical analysis results are presented for both the original protocol and the proposed scheme. A performance improvement of greater than 10% was achieved with the proposed implementation.

  14. New IEEE standard enables data collection for medical applications.

    Science.gov (United States)

    Kennelly, R J; Wittenber, J

    1994-01-01

    The IEEE has gone to ballot on a "Standard for Medical Device Communications", IEEE P1073. The lower layer, hardware portions of the standard are expected to be approved by the IEEE Standards Board at their December 11-13, 1994 meeting. Other portions of the standard are in the initial stages of the IEEE ballot process. The intent of the standard is to allow hospitals and other users to interface medical electronic devices to host computer systems in a standard, interchangeable manner. The standard is optimized for acute care environments such as ICU's, operating rooms, and emergency rooms. [1] IEEE General Committee and Subcommittee work has been on-going since 1984. Significant amounts of work have been done to discover and meet the needs of the patient care setting. Surveys performed in 1989 identified the following four key user requirements for medical device communications: 1) Frequent reconfiguration of the network. 2) Allow "plug and play" operation by users. 3) Associate devices with a specific bed and patient. 4) Support a wide range of hospital computer system topologies. Additionally, the most critical difference in the acute care setting is patient safety, which has an overall effect on the standard. The standard that went to ballot meets these requirements. The standard is based on existing ISO standards. P1073 is compliant with the OSI seven layer model. P1073 specifies the entire communication stack, from object-oriented software to hospital unique connectors. The standard will be able to be put forward as a true international standard, much in the way that the IEEE 802.x family of standards (like Ethernet) were presented as draft ISO standards.(ABSTRACT TRUNCATED AT 250 WORDS)

  15. Alcohol Gel Ingestion Among Homeless Eastern and Central Europeans in London: Assessing the Effects on Cognitive Functioning and Psychological Health

    OpenAIRE

    Dawkins, LE; Soar, K; Papaioannou, G.

    2016-01-01

    Background: Intentional consumption of alcohol based hand gels has been reported especially amongst non-UK national, alcohol dependent, homeless individuals in London. Whilst alcohol misuse is known to be associated with impaired cognitive functioning and mental health problems, the effects of additional ingestion of alcohol gel are unknown. Objectives: To explore cognitive and psychological functioning in users who intentionally ingest alcohol gel compared with ethyl-alcohol only misusers an...

  16. System Behavior Specification Using IEEE Std 1175.4

    Science.gov (United States)

    2010-04-27

    22nd Annual Systems & Software Technology Conference S stem Beha ior Specification1 7 y v Using IEEE Std 1175.4 e v i e w 5 2 8 1 2 R 27 April...DATE 27 APR 2010 2. REPORT TYPE 3. DATES COVERED 00-00-2010 to 00-00-2010 4. TITLE AND SUBTITLE System Behavior Specification Using IEEE Std ...RESPONSIBLE PERSON a. REPORT unclassified b. ABSTRACT unclassified c. THIS PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std

  17. IEEE 802.15.4 Modifications and Their Impact

    Directory of Open Access Journals (Sweden)

    M. Goyal

    2011-01-01

    Full Text Available IEEE 802.15.4 is a popular choice for MAC/PHY protocols in low power and low data rate wireless sensor networks. In this paper, we suggest several modifications to beaconless IEEE 802.15.4 MAC operation and evaluate their impact on the performance via stochastic modeling and simulations. We found that the utility of these modifications is strongly dependent on the traffic load on the network. Accordingly, we make recommendations regarding how these modifications should be used in view of the prevalent traffic load on the network.

  18. IEEE prize awarded to CERN PhD student

    CERN Multimedia

    2006-01-01

    Rafael Ballabriga Suñe is the recipient of the 2006 Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nuclear and Plasma Sciences Society (NPSS)'s Student Paper Award. Ballabriga's winning paper reported on a prototype chip, which belongs to a new generation of single photon counting hybrid pixel detector readout chips - Medipix3. The award was presented by the deputy programme chair Vince Cianciolo (left) at the IEEE Nuclear Science Symposium held in San Diego on 29 October to 4 November.

  19. Research on IEEE 802.11 wireless local area networks standards%IEEE802.11无线局域网标准研究

    Institute of Scientific and Technical Information of China (English)

    李浩; 高泽华; 高峰; 赵荣华

    2009-01-01

    介绍了IEEE 802.11全系列标准,研究了IEEE 802.11系列各标准的发展轨迹和相互关系,建立了该系列标准的层次模型.研究并分析了IEEE 802.11、IEEE 802.11a、IEEE 802.11b、IEEE 802.11g和IEEE 802.11n这几种常见标准,并对相应物理层和媒质访问控制层的关键技术作了重点分析.

  20. Assessing the sources and bioaccessibility of Lead in Soils from London

    Science.gov (United States)

    Cave, Mark R.; Wragg, Joanna; Chenery, Simon

    2013-04-01

    The lead content of soil is important since it is toxic to humans and particularly because children tend to more readily absorb lead than do adults: children absorb up to 40% into the bloodstream from ingested or inhaled lead, versus 5-15% in adults. Studies have shown that relatively low concentrations of lead in blood can lead to significant decrease in IQ of children (e.g. Jakubowski, 2011) leading to neuropathy and hypertension in adults. The British Geological Survey has recently completed a systematic high-density geochemical soil survey of the Greater London Area (GLA) in which over 6000 surface soil samples were collected and analysed for 50 elements. The Pb content of the soils range from 11 mg/kg to greater than 10000 mg/kg with mean and median values of 301 and 185 mg/kg, respectively. The ingestion bioaccessible fraction of Pb was measured using an in-vitro bioaccessibility test showing that 68% of the total Pb in London soils is bioaccessible. Measurement of Pb isotopic ratios in selected soils matched with those found in London air particulates and, to a lesser extent, with petrol lead. Self modelling mixture resolution of the 50 element geochemical data set was used to identify geochemically distinct components in the data with Pb being associated with 11 of the components which were of both natural and anthropogenic origin. Relationships between the soil components, the bioaccessible fraction and the Pb isotope ratios provided an indication of the sources of mobile lead in the London soils. References JAKUBOWSKI, M. 2011. Low-level environmental lead exposure and intellectual impairment in children - the current concepts of risk assessment. International Journal of Occupational Medicine and Environmental Health, Vol. 24, 1-7. APPLETON, J D, CAVE, M R, and WRAGG, J. 2012. Modelling lead bioaccessibility in urban topsoils based on data from Glasgow, London, Northampton and Swansea, UK. Environmental Pollution, Vol. 171, 265-272.

  1. 适用于数字化变电站的IEEE1588测试仪的研制%Development of IEEE1588 tester for digital substation

    Institute of Scientific and Technical Information of China (English)

    陈炯聪; 崔全胜; 魏勇; 郑运召

    2012-01-01

    According to IEEE 1588 protocol testing requirements in digital substation, a development scheme of IEEE1588 tester for digital substation is proposed. The scheme analyzes the IEEE1588 tester's system functional requirements, introduces its hardware & software design, and studies the control mode of test cases and test automation implementation. Using the closed loop test system, IEEE1588 conformance testing of intelligent devices in digital substation can be achieved. The practical testing application shows that the tester can correctly perform real-time closed-loop IEEE] 588 conformance testing of intelligent devices, can significantly improve the testing efficiency of IEEE1588 protocol, so it can ensure the accuracy and reliability of IEEE1588 protocol implementation of intelligent devices.%针对数字化变电站中智能设备的IEEE1588协议测试需求,提出了一种适用于数字化变电站的IEEE1588测试仪的研制方案.该方案分析了IEEE1588测试仪的系统功能要求、介绍了其硬件及软件设计,并研究了测试案例控制模式和测试自动化实现.利用该测试仪构成的闭环测试系统,可以实现数字化变电站中智能设备的IEEE1588协议一致性测试.实际应用效果表明该测试仪能正确完成智能设备的IEEE1588协议实时闭环测试,可显著提高智能设备IEEE1588协议测试效率,确保智能设备IEEE1588协议实现的正确性和可靠性.

  2. Accounting for Impact at Imperial College London

    DEFF Research Database (Denmark)

    Perkmann, Markus; Fini, Riccardo; Ross, Jan-Michael

    We report findings of a study of academic engagement and commercialisation at Imperial College London. We detail the extent of collaboration with industry, consulting, patenting and entrepreneurship by Imperial academics, as well as individuals’ motivations and perceived barriers to engagement. T...

  3. Movement and Character. Lecture, London, 1946

    Science.gov (United States)

    Montesorri, Maria

    2013-01-01

    Dr. Montessori's words from the 1946 London Lectures describe principles of intelligence and character, the work of the hand, and movement with a purpose as being integral to self-construction. The perfection of movement is spiritual, says Dr. Montessori. Repetition of practical life exercises are exercises in movement with the dignity of human…

  4. Staging the orient. Aladdin London - Copenhagen

    DEFF Research Database (Denmark)

    Svane, Marie-Louise

    2017-01-01

    En sammenligning af John O'Keefes / Charles Farleys sceniske opsætning af Aladdin-eventyret fra Tusind og én nats eventyr i London (1813) med Adam Oehlenschlägers Aladdin-lystspil i København (1805). Artiklen diskuterer de to versioner af eventyrstykket som fortolkning og respons på to forskellig...

  5. Loss and material culture in South London

    NARCIS (Netherlands)

    Miller, D.; Parrott, F.

    2009-01-01

    This article describes the ways in which people, mainly selected from a single street in South London, utilize material culture in dealing with various experiences of separation and loss, such as death or the ending of a relationship. It starts from a dialectical approach to all relationships as con

  6. E. B. Nicholson and the London Institution

    Science.gov (United States)

    Manley, K. A.

    1973-01-01

    This article provides a history of the London Institution from 1805 to 1912, with special emphasis on E. B. Nicholson's term of office. The last years of the Institution are considered, its financial difficulties being traced back to the terms of its original foundation, and to the changing situation of its members. (47 references) (Author/SJ)

  7. Comparison and assessment of the participation of Polish swimmers at the Olympic and Paralympic Games in London

    Directory of Open Access Journals (Sweden)

    Seidel Wojciech

    2014-05-01

    Full Text Available Purpose : to assess and analyze the results of the Polish national team swimmers (Olympic and Paralympic at the XIV Summer Games 2012 in London (UK . Material : Score Polish swimmers start in London was carried out on the basis of medals won, participation in the finals. London also comparing the results with respect to the personal life record. The studies used the method of improving the outcome of the relative percentages - RPG% (relative performance gain %. It is based on the equation of RPG% = start time - end time / start time x 100. Material was to analyze and develop the results obtained by the Polish swimmers at the XIV Olympic and Paralympic Games in 2012 in London. Results : the basic criterion for evaluating the training and participation of Polish swimmers at the games in London was the number of medals won. By this criterion, the Poles showed a rather weak result. Healthy athletes do not receive medals. Thus, they confirmed their poor showing four years ago. Athletes with disabilities unable to get on the podium three times. In relation to the previous games (they won 10 medals the result was rather weak. Conclusions : in terms of participation in the Olympic finals and improve individual life records, the results were slightly better swimmers with disabilities.

  8. Skyscraper indicator and its application in the UK

    Directory of Open Access Journals (Sweden)

    Arvydas Jadevicius

    2016-06-01

    Full Text Available Objective: The research examines Skyscraper Indicator and its application in the UK. Until more recently, it was thought that this indicator was not suitable in gaging trajectory of Britain’s economy. The current study is therefore set to investigate whether Skyscraper Indicator can be used as a potential leading indicator for the UK. Research Design & Methods: Research employs dummy variable regression to test the hypothesis. The study selects quarterly UK GDP and GDP per capita series over Q1 1960 - Q4 2014 period as macro variables and a series of dummies for construction starts, durations and completions of the record-breaking buildings in the UK. Findings: Despite some of the methodological limitations, estimates suggest that the announcement of the construction of tallest building in the UK is related to national GDP. Implications & Recommendations: To make robust economic forecasts, analysts may therefore use the announcement of the construction of the record breaking skyscraper as a possible bell-weather in gaging future direction of the UK economy. They may turn their gaze towards the London skyline when contemplating UK market movements. Contribution & Value Added: The paper adds additional evidence on the contested Skyscraper Indicator issue.

  9. CSP-IEEE Instrumentation and Measurement Technology Conference 2016 (IEEE 12MTC 2016)

    Science.gov (United States)

    2016-08-22

    and Malaysia . Travelling expense and accommodation cost of the conference venue are two major concerns which cause some regular attendees from Brazil...the Conference is in Asia , therefore China , Taiwan , Malaysia , and India were on the list. As for the acceptance rat ion , Austria , Italy, UK...15 69.4% Brazil 14 7 66.7% USA 15 6 71.4% Malaysia 12 10 54 .5% Germany 9 3 75.0% United Kingdom 10 2 83 .3% Canada 8 2 80.0% Austria 10 0

  10. 基于IEEE1149.1及IEEE1149.4标准的测试技术研究%Study of test techniques based on IEEE1149.1 and IEEE1149.4

    Institute of Scientific and Technical Information of China (English)

    苏波

    2012-01-01

    With rapid development of electronic technology, the integrated degree of circuits has greatly increased) more and more problems have to be faced in the field of test. The technology of DFT( design for testability) is one of the key solutions to deal with the problems of test. And the boundary-scan technology is a kind of the DFT methods, which is used widely. With intensive study on IEEE std 1149. 4 and IEEE std 1149.1 .this paper explores the testability structure based on boundary-scan,the result of the paper has important theory value and practical significance.%随着电子技术的飞速发展,电路的集成度越来越高,使其测试面临越来越多的问题.可测性设计成为解决测试问题的主要手段之一,而边界扫描技术是众多可测性设计方法中使用较为广泛的一种.在深入研究IEEE1149.1及IEEE1149.4标准的基础上,对基于边界扫描可测性结构进行了探索,具有重要的理论价值和实际意义.

  11. Local Positioning Services on IEEE 802.11 Networks

    Directory of Open Access Journals (Sweden)

    A. M. Vegni

    2008-06-01

    Full Text Available This paper deals with localization services in IEEE 802.11 networks, for indoor environment. The proposed solution processes the Time Of Arrival of location packets sent by a Mobile Terminal, that makes access in a IEEE 802.11 network. A set of Location Supporting Nodes and a Location Support Server composes an indoor location services architecture. A fully compatible IEEE 802.11 Localization Services protocol supporting data exchange related to both TOA measurement and processing is reported. Simulation results show the method efficiency in both IEEE 802.11 PCF and DCF modes. Assessment of the maximum number of users for which location services can be provided is also reported. Since high localization accuracy requires large bandwidth, a broadband antenna for LSN and LSS was designed. The related results are reported in the second part of the paper. The antenna works at 5.0 GHz (centre frequency in broadband mode and is matched on the wireless operating frequencies with a percentage more than 8% (1:1.5 VSWR.

  12. Specialty and Systems Engineering Supplement to IEEE 15288.1

    Science.gov (United States)

    2017-08-28

    15288.1 Tailoring Language ............................................................................ 2 3.2.1 Specialty Engineering Analysis and...believed necessary to maintain the level or rigor required by national security space acquisitions . 2. Context IEEE-15288.1: 2014, Standard for...be: 1. Normative (requirements rather than informative guidance), 2. Tailored appropriately for specific acquisition /contract considerations, and 3

  13. Editorial for IEEE Transactions on Power Electronics, January 2013

    DEFF Research Database (Denmark)

    Blaabjerg, Frede; Lehman, Brad

    2013-01-01

    should increase the impact factor of the IEEE TRANSACTIONS ON POWER ELECTRONICS (TPEL). In 2007, TPEL published 2600 pages, and it has gradually been increased to 4000 pages in 2011, 5000 pages in 2012, and 5500 pages are projected for 2013. We have decided to publish 12 printed issues so every month...

  14. Eleanor McElwee and the Formation of IEEE PCS

    Science.gov (United States)

    Malone, Edward A.

    2015-01-01

    This article examines the historical professional project that created the Institute of Radio Engineers' Professional Group on Engineering Writing an Speech (IRE PGEWS)--now called the Institute of Electrical and Electronics Engineers' Professional Communication Society (IEEE PCS)--and recounts the group's early history in detail. It also traces…

  15. Editorial for the IEEE Transactions on Power Electronics, January 2009

    DEFF Research Database (Denmark)

    Blaabjerg, Frede

    2009-01-01

    I am entering the fourth year as the Editor in Chief of the IEEE TRANSACTIONS ON POWER ELECTRONICS. A position like this becomes more and more important for the technical field as publishing in a peer-reviewed highly ranked journal has influence on the industrial and academic career. It is a way...

  16. Proceedings of the IEEE Machine Learning for Signal Processing XVII

    DEFF Research Database (Denmark)

    The seventeenth of a series of workshops sponsored by the IEEE Signal Processing Society and organized by the Machine Learning for Signal Processing Technical Committee (MLSP-TC). The field of machine learning has matured considerably in both methodology and real-world application domains and has...

  17. Eleanor McElwee and the Formation of IEEE PCS

    Science.gov (United States)

    Malone, Edward A.

    2015-01-01

    This article examines the historical professional project that created the Institute of Radio Engineers' Professional Group on Engineering Writing an Speech (IRE PGEWS)--now called the Institute of Electrical and Electronics Engineers' Professional Communication Society (IEEE PCS)--and recounts the group's early history in detail. It also traces…

  18. A timed verification of the IEEE 1394 leader election protocol

    NARCIS (Netherlands)

    Romijn, J.M.T.

    1999-01-01

    The IEEE 1394 architecture standard defines a high performance serial multimedia bus that allows several components in a network to communicate with each other at high speed. In the physical layer of the architecture, a leader election protocol is used to find a spanning tree with a unique root in t

  19. Survey of community pharmacists' perception of electronic cigarettes in London

    Science.gov (United States)

    Marques Gomes, Ana C N; Nabhani-Gebara, Shereen; Kayyali, Reem; Buonocore, Federico; Calabrese, Gianpiero

    2016-01-01

    Objectives To seek community pharmacists' perception on use, safety and possible effectiveness of e-cigarettes as quit smoking tools, and their future regulation. Setting A survey of a sample of 154 community pharmacies across London, UK. Context E-cigarettes have exclusively established themselves in the market through consumers-led demand. To date, e-cigarettes still remain unregulated and can be easily purchased in shops, over the internet, but more controversially also in pharmacies in the UK. Pharmacists find themselves with a shortage of information on their safety and efficacy, and may experience an ethical dilemma when consulted by patients/customers. Key findings Response rate: 60% (n=92). Independent pharmacies accounted for 90% of the sample. The majority of participants (73%) sell e-cigarettes. A minority of participants (20%) have been presented with adverse effects such as cough and dry mouth. As possible reasons for their use, pharmacists ranked ‘aid in stop smoking’ as the most important (56%), with ‘cheaper alternative’ (43%) and ‘social/recreational use’ (31%) being the least important ones. Safety issues were raised as statements such as ‘e-liquid in cartridges may be toxic’ were agreed by 52% of respondents. The majority of pharmacists (97%) were supportive of e-cigarettes being regulated, expressing current concerns regarding excipients (42%) and nicotine content (34%). Participants indicated that they would require training in the form of information packs (88%), online tutorials (67%), continuous professional development (CPD) workshops (43%) to cover safety, counselling, dosage instructions, adverse effects and role in the smoking cessation care pathway in the future. Conclusions Pharmacists expressed concerns about the safety of e-cigarettes, especially regarding the amounts of excipients and nicotine as these still remain unregulated. Currently, there are no guidelines for pharmacists regarding e-cigarettes. Community

  20. Integrating Regional Development, Promoting Local Cooperation Reflections on the China-UK Regional Leaders Exchange Program

    Institute of Scientific and Technical Information of China (English)

    Liu; Chang

    2016-01-01

    The first China-UK Regional Leaders Meeting was held March21-24 in the United Kingdom,both in London and the industrial city of Sheffield.The event was jointly organized by the CPAFFC and the British Department for Communities and Local Government.The Chinese delegation,comprising government

  1. Supporting a UK Success Story: The Impact of University Research and Sport Development

    Science.gov (United States)

    Universities UK, 2012

    2012-01-01

    As part of an Olympic and Paralympic themed Universities Week this new report highlights just some of the many ways in which research will help Team Great Britain achieve exceptional results. While most attention will be on the results achieved in London this summer, it is inspiring to look at the research taking place in UK universities that will…

  2. Listening to those on the frontline: service users' experiences of London tuberculosis services

    Directory of Open Access Journals (Sweden)

    Boudioni M

    2011-06-01

    Full Text Available Markella Boudioni, Susan McLaren, Ruth Belling, Leslie WoodsInstitute for Leadership and Service Improvement, Faculty of Health and Social Care, London South Bank University, London, UKAim: To explore tuberculosis (TB service users' experiences and satisfaction with care provision.Background: Thirty-nine percent of all new UK TB cases occur in London. Prevalence varies considerably between and within boroughs. Overall, research suggests inadequate control of London's TB transmission; TB has become a health care priority for all London Primary Care Trusts. Service users' experiences and satisfaction with care provision have not been explored adequately previously.Methods: A qualitative research design, using semi-structured face-to-face interviews was used. Ten service users, purposively selected in key risk groups across London, were interviewed. All interviews were digitally recorded with users' permission, transcribed verbatim, and analyzed thematically.Results: Participants were treated in local hospitals for 6–12 months. Treatment was administered by TB nurses to inpatients and outpatients receiving directly observed therapy in consultation with medical staff and home visits for complex cases. Two participants did not realize the importance of compliance. Overall, they were satisfied with many TB services' aspects, communication, and service organization. Early access, low suspicion index amongst some GPs, and restricted referral routes were identified as service barriers. Other improvement areas were information provision on drug side effects, diet, nutritional status, and a few health professionals' attitudes. The effects on people varied enormously from minimal impact to psychological shock; TB also affected social and personal aspects of their life. With regard to further support facilities, some positive views on managed accommodation by TB-aware professionals for those with accommodation problems were identified.Conclusion: This

  3. Enhancing MAC performance of DCF protocol for IEEE 802.11 wireless LANs

    National Research Council Canada - National Science Library

    Woo-Yong Choi

    2017-01-01

    ...) protocol of IEEE 802.11 wireless LANs and compatible with various IEEE 802.11 PHY extensions. The performance of the DCF degrades exponentially as the number of nodes participating in the DCF transmission procedure increases...

  4. CITY OF LONDON: THE SECRETS OF STABILITY

    Directory of Open Access Journals (Sweden)

    M. K. Belyaev

    2010-01-01

    Full Text Available Reasons why the City, oldest London global financial centre, keeps to hold up leading positions in the financial world, are thoroughly discussed. Initially, this phenomenon was explained by dominating position England held as world industrial power. However, the City has not lost its leadership over last decades when England economics suffered bad times. This is explained by traditions, by the history as well as by specific position London holds as place where «business is made» as well as by the trend to «clustering» i.e. concentration characteristic for the market of financial services, all this making it possible for financial companies to cut their costs and to provide their clients with services on more attractive conditions.

  5. Uncertainties in Tidally Adjusted Estimates of Sea Level Rise Flooding (Bathtub Model for the Greater London

    Directory of Open Access Journals (Sweden)

    Ali P. Yunus

    2016-04-01

    Full Text Available Sea-level rise (SLR from global warming may have severe consequences for coastal cities, particularly when combined with predicted increases in the strength of tidal surges. Predicting the regional impact of SLR flooding is strongly dependent on the modelling approach and accuracy of topographic data. Here, the areas under risk of sea water flooding for London boroughs were quantified based on the projected SLR scenarios reported in Intergovernmental Panel on Climate Change (IPCC fifth assessment report (AR5 and UK climatic projections 2009 (UKCP09 using a tidally-adjusted bathtub modelling approach. Medium- to very high-resolution digital elevation models (DEMs are used to evaluate inundation extents as well as uncertainties. Depending on the SLR scenario and DEMs used, it is estimated that 3%–8% of the area of Greater London could be inundated by 2100. The boroughs with the largest areas at risk of flooding are Newham, Southwark, and Greenwich. The differences in inundation areas estimated from a digital terrain model and a digital surface model are much greater than the root mean square error differences observed between the two data types, which may be attributed to processing levels. Flood models from SRTM data underestimate the inundation extent, so their results may not be reliable for constructing flood risk maps. This analysis provides a broad-scale estimate of the potential consequences of SLR and uncertainties in the DEM-based bathtub type flood inundation modelling for London boroughs.

  6. Immunisation status in inner London primary schools.

    OpenAIRE

    Bedford, H E; Masters, J I; Kurtz, Z

    1992-01-01

    In one inner London district health authority, the immunisation status of children attending their routine school entry health interview was reviewed over four terms. During the course of these interviews, school nurses completed a questionnaire with parents that asked for their child's immunisation history and details of family and social background. Parental reporting of immunisation history was compared with district health authority records. Only 56% of children reviewed were found to be ...

  7. Accounting for Impact at Imperial College London

    DEFF Research Database (Denmark)

    Perkmann, Markus; Fini, Riccardo; Ross, Jan-Michael

    We report findings of a study of academic engagement and commercialisation at Imperial College London. We detail the extent of collaboration with industry, consulting, patenting and entrepreneurship by Imperial academics, as well as individuals’ motivations and perceived barriers to engagement. T....... The data stems from archival records held by the College, complemented by external databases, and a survey conducted among all academic staff in 2013....

  8. Forty Years of Crime in London (Journal)

    OpenAIRE

    Shoemaker, R.B.

    2015-01-01

    As a contribution to the fortieth anniversary celebrations of the London Journal, this article provides an overview of the twenty-seven articles which it has published about crime and criminal justice since its inception. While few articles were published in its early years, there has been a big increase in articles published in the last decade, pushing the Journal into the forefront of the historiography on these topics. A survey of the recurring themes in articles about crime, policing, jus...

  9. The role of one large greenspace in mitigating London's nocturnal urban heat island.

    Science.gov (United States)

    Doick, Kieron J; Peace, Andrew; Hutchings, Tony R

    2014-09-15

    The term urban heat island (UHI) describes a phenomenon where cities are on average warmer than the surrounding rural area. Trees and greenspaces are recognised for their strong potential to regulate urban air temperatures and combat the UHI. Empirical data is required in the UK to inform predictions on cooling by urban greenspaces and guide planning to maximise cooling of urban populations. We describe a 5-month study to measure the temperature profile of one of central London's large greenspaces and also in an adjacent street to determine the extent to which the greenspace reduced night-time UHI intensity. Statistical modelling displayed an exponential decay in the extent of cooling with increased distance from the greenspace. The extent of cooling ranged from an estimated 20 m on some nights to 440 m on other nights. The mean temperature reduction over these distances was 1.1 °C in the summer months, with a maximum of 4 °C cooling observed on some nights. Results suggest that calculation of London's UHI using Met Stations close to urban greenspace can underestimate 'urban' heat island intensity due to the cooling effect of the greenspace and values could be in the region of 45% higher. Our results lend support to claims that urban greenspace is an important component of UHI mitigation strategies. Lack of certainty over the variables that govern the extent of the greenspace cooling influence indicates that the multifaceted roles of trees and greenspaces in the UK's urban environment merit further consideration.

  10. Approximation of the IEEE 802.11p standard using commercial off-the-shelf IEEE 802.11a hardware

    OpenAIRE

    2011-01-01

    IEEE 802.11p hardware is hard to find. Previous research efforts often relied on project-specific prototype implementations which are characterized by a high cost and are not always available to the entire research community. Commercially available turnkey implementations are rare and quite expensive compared to commercial of-the-shelf (COTS) IEEE 802.11a/b/g hardware. However, the difference between the IEEE 802.11p amendment and the other IEEE 802.11 standards is quite small. It can be seen...

  11. Should an iBSc in Management be compulsory for all UK medical students?

    Directory of Open Access Journals (Sweden)

    Singh B

    2015-05-01

    Full Text Available Bharpoor Singh,1 Natalie Ramjeeawon,2 Neil Shah,1 Shawmian Singagireson1 1Imperial College London, London, UK; 2University of Sheffield, Sheffield, UKThe UK medical school system has traditionally offered an intercalated science degree (iBSc to supplement their regular medical degree. However, in recent times with an increasing focus on leadership in the National Health Service (NHS, there has been a shift. More medical schools now offer the option to study an iBSc in Management.I have just spent a year completing an iBSc in Management at Imperial College Business School. Throughout the year I became more and more immersed in our intricate health care system, which is only really apparent to health care professionals whilst on the job. My question to the General Medical Council is – should an iBSc in Management be compulsory for all UK medical students?

  12. Prevalence and correlates of disordered eating in a general population sample: the South East London Community Health (SELCoH) study

    OpenAIRE

    Solmi, F.; Hatch, S. L.; Hotopf, M; Treasure, J.; Micali, N.

    2014-01-01

    Purpose Disordered eating has been shown to be more prevalent than full eating disorders diagnoses. However, research on its prevalence, socio-demographic, psychological correlates, and patterns of service use in multi-ethnic samples is still limited. This paper explores these associations in a South London-based (UK) sample. Methods The South East London Community Health (SELCoH) study is a general population survey (N = 1,698) of individuals aged 16+. Disordered eating was defined as ≥2 pos...

  13. RATE ADAPTIVE PROTOCOL FOR MULTIRATE IEEE 802.11 NETWORKS

    Institute of Scientific and Technical Information of China (English)

    Xi Yong; Huang Qingyan; Wei Jibo; Zhao Haitao

    2007-01-01

    In this paper,a rate adaptive protocol AMARF(Adaptive Multirate Auto Rate Fallback)for multirate IEEE 802.11 networks is proposed.In AMARF,each data rate is assigned a unique success threshold,which is a criterion to judge when to switch a rate to the next higher one,and the success thresholds call be adjusted dynamically in an adaptive manner according to the running conditions,such as packet length and channel parameters.Moreover,the proposed protocol can be implemented by software without any change to the current IEEE 802.11 standards.Simulation result shows that AMARF yields significantly higher throughput than other existing schemes including ARF and its variants,in various running conditions.

  14. Performance analysis of IEEE 802.11 DCF networks

    Institute of Scientific and Technical Information of China (English)

    Krzysztof SZCZYPIORSKI; Jázef LUBZCZ

    2008-01-01

    This paper presents an analytical saturation throughput model of IEEE 802.11DCF (distributed coordination function)with basic access in ad hoc mode. The model takes into account freezing of the backoff timer when a station senses busy channel.It is shown that taking into account this feature of DCF is important in modeling saturation throughput by yielding more accurate and realistic results than models known from literature. The proposed analytical model also takes into account the effect of transmission errors. All essential features of the proposed analytical approach are illustrated with numerical results. The presen-tation of the model is proceeded by an overview of approaches to IEEE 802.11 network performance evaluation presented in the literature.

  15. Avago首席科学家荣获IEEE Fellow奖

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Avago Technologies(安华高科技)宣布John Larson Ⅲ博士在英国哥伦比亚范库弗峰州举办的2006年国际超声波研讨会上荣获知名的IEEE Fellow奖。IEEE Fellow奖由专业人员提名产生,旨在表彰在各个工程设计领域中取得杰出成绩的人才。Avago Technologies(安华高科技)是为先进的通信、工业和商业等应用领域提供创新的半导体解决方案的领导厂商。

  16. IEEE prize awarded to CERN PhD student

    CERN Multimedia

    2006-01-01

    Rafael Ballabriga Suñe (right) receives the Student Paper Award. Rafael Ballabriga Suñe is the recipient of the 2006 Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nuclear and Plasma Sciences Society (NPSS)'s Student Paper Award. Ballabriga's winning paper reported on a prototype chip, which belongs to a new generation of single photon counting hybrid pixel detector readout chips - Medipix3. The NPSS established this award in 2005 to encourage outstanding student contributions and greater student participation as principle or sole authors of papers. The prizes were presented at the IEEE Nuclear Science Symposium held in San Diego on 29 October to 4 November. The prototype chip was designed by Ballabriga based on ideas generated within the CERN Medipix team - part of the PH Microelectronics group. It could be used in various fields in the future, including medical imaging, neutron imaging, electron microscopy, radiation monitoring and other applications in high-energy physics. The novel aspe...

  17. Interoperability in wireless sensor networks based on IEEE 1451 standard

    OpenAIRE

    Higuera Portilla, Jorge Eduardo; Polo Cantero, José

    2012-01-01

    The syntactic and semantic interoperability is a challenge of the Wireless Sensor Networks (WSN) with smart sensors in pervasive computing environments to increase their harmonization in a wide variety of applications. This chapter contains a detailed description of interoperability in heterogeneous WSN using the IEEE 1451 standard. This work focuses on personal area networks (PAN) with smart sensors and actuators. Also, a technical, syntactic and semantic levels of interoperability based on ...

  18. Interoperability in wireless sensor networks based on IEEE 1451 standard

    OpenAIRE

    Higuera Portilla, Jorge Eduardo; Polo Cantero, José

    2012-01-01

    The syntactic and semantic interoperability is a challenge of the Wireless Sensor Networks (WSN) with smart sensors in pervasive computing environments to increase their harmonization in a wide variety of applications. This chapter contains a detailed description of interoperability in heterogeneous WSN using the IEEE 1451 standard. This work focuses on personal area networks (PAN) with smart sensors and actuators. Also, a technical, syntactic and semantic levels of interoperability based on ...

  19. 认识IEEE1394端口

    Institute of Scientific and Technical Information of China (English)

    王玉岭

    2005-01-01

    Apple称之为FireWire(火线)Sony称之为i.Link Texas Instruments称之为Lynx。尽管各厂商注册的商标名称不同,但实质都是一项技术,那就是IEEE1394。为什么PC业界对其会如此着迷呢?

  20. 17th IEEE NPSS Real Time Conference – RT-2010

    CERN Multimedia

    Carlos Varandas

    2010-01-01

    Congress Centre of “Instituto Superior Técnico”, Lisboa, Portugal, 24-28 May, 2010 ABSTRACT SUBMISSION OPEN Abstract Submission Deadline: March 1st, 2010 Dear Sir/Madam, We are pleased to announce that abstract submission for the 17th IEEE NPSS Real Time Conference is now open on our web site. The deadline for submitting an abstract is 1st March 2010. Full conference details General Chairman

  1. Performance Analysis of the IEEE 802.11s PSM

    Directory of Open Access Journals (Sweden)

    Mirza Nazrul Alam

    2012-01-01

    Full Text Available With the introduction of IEEE 802.11 power save mode (PSM, a lot of work has been done to enhance the energy saving ability of the wireless nodes. The ultimate goal of the research is to make the networking equipment carbon neutral and prolong the lifetime of the energy limited device for various applications; in some cases it is a trade-off between energy efficiency and delay. However, few studies have been made until now in the area of IEEE 802.11s based link specific power mode. The essence of this method is the ability of a node to maintain different power modes with its different peer nodes at the same time. A new peer service period (PSP mechanism is also proposed in IEEE 802.11s amendment for transmitting to a receiver operating in PSM. In this paper the performance of the link specific power mode is studied for a single- and a multilink network in terms of energy, delay throughput, and sleep duration. It is found that at small load the energy saving could be as high as eighty percent when compared with the active mode operation. A stochastic model, based on discrete time discrete state Markov chain, is developed for one peer link operation to study the system behavior closely during PSM operation.

  2. Coexistence of IEEE 802.11b/g WLANs and IEEE 802.15.4 WSNs: Modeling and Protocol Enhancements

    NARCIS (Netherlands)

    Yuan, W.

    2011-01-01

    As an emerging short-range wireless technology, IEEE 802.15.4/ZigBee Wireless Sensor Networks (WSNs) are increasingly used in the fields of home control, industrial control, consumer electronics, energy management, building automation, telecom services, personal healthcare, etc. IEEE

  3. Coexistence of IEEE 802.11b/g WLANs and IEEE 802.15.4 WSNs: Modeling and Protocol Enhancements

    NARCIS (Netherlands)

    Yuan, W.

    2011-01-01

    As an emerging short-range wireless technology, IEEE 802.15.4/ZigBee Wireless Sensor Networks (WSNs) are increasingly used in the fields of home control, industrial control, consumer electronics, energy management, building automation, telecom services, personal healthcare, etc. IEEE 802.15.4/Zig-Be

  4. A Brief Analysis on William Blake's London

    Institute of Scientific and Technical Information of China (English)

    张莉; 尚彦飞

    2014-01-01

    William Blake (1757-1827) is a renowned British poet in the 18th century. His lyric poems display the characteristics of romantic spirit, and he is regarded as the forefather of the British Romanticism. His London is a well-known lyric poetry, which is thought to be the best vesicle in the West. This paper will analyse this poem in terms of its form, theme, and im-age and then draw a brief conclusion for the characteristics of William Blake's poem.

  5. On biocoloniality and 'respectability' in contemporary London.

    OpenAIRE

    Narayan, Yasmeen

    2015-01-01

    This essay is framed by discussions on the civil unrest in British cities in 2011, the politics of austerity, the mass unemployment of the young, ‘the war on terror’ and ‘radicalisation’ and the vulnerability of the poor and ‘unrespectable’. It advances a concept of biocoloniality and explores ‘respectability’, class and transnational postcolonial urban cultures in contemporary London. The essay argues for a theorisation which can account for how a divided subject produces the effect of an un...

  6. "More Swimming Lessons from the London Whale"

    OpenAIRE

    Jan KREGEL

    2013-01-01

    This policy brief by Senior Scholar and Program Director Jan Kregel builds on an earlier analysis (Policy Note 2012/6) of JPMorgan Chase and the actions of the "London Whale", and what this episode reveals about the larger risks inherent in the financial system. It is clear that the Dodd-Frank Act failed to prevent massive losses by one of the world's largest banks. This is undeniable evidence that work remains to be done to reform the financial system. Toward this end, Kregel reviews the fin...

  7. Parallel to the Situational Judgement Test: is the Educational Performance Measure fair in ranking medical students on the UK Foundation Programme?

    Directory of Open Access Journals (Sweden)

    Singh Sidhu H

    2016-10-01

    Full Text Available Harmeet Singh Sidhu,1 Adil Mahmood,2 Ranjodh Sanghera,1 Jay Mandan11Faculty of Medicine, Imperial College London, London, UK; 2Faculty of Life Sciences and Medicine, King’s College London, London, UKWe readily appraised the expert opinion by Singagireson et al which explored the fairness of using the Situational Judgement Test (SJT to rank medical students as part of the UK Foundation Programme.1 Although we agree with many of the points raised, we feel it is equally important to discuss the role of the Educational Performance Measure (EPM, which has comparable weighting to the SJT in ranking medical students. Therefore, we aim to explore whether the EPM is a fair measure in determining the allocation of foundation-training jobs to newly qualified doctors.View the original paper by Singagireson et al

  8. The Volunteering Legacy of London 2012 Games. A Pilot Study.

    OpenAIRE

    2016-01-01

    The hosting of the London 2012 Olympic Games was seen as an opportunity to harness the enthusiasm of the 70000 volunteers involved and to provide a volunteer legacy post event. A total of 77 London 2012 volunteers completed a web-based open-ended survey. The participants were asked to indicate their level of current volunteering engagement and whether volunteering at the Games had an impact on their current volunteering levels. The study found that the London Olympics were the first volunteer...

  9. An audit of HIV treatment outcomes in a UK inner city cohort.

    Science.gov (United States)

    Bird, E; Cormack, I; Rodgers, M; Phillips, D; Elgalib, A

    2016-10-01

    We describe the demographics and treatment outcomes of a HIV-infected cohort from Croydon University Hospital, London, UK. We showed that the Croydon Cohort had good viral load suppression (98.6% with viral load < 100 copies/ml and 99.0% with viral load < 200 copies/ml) despite being a potentially challenging cohort in a deprived area of London. The viral load outcomes are better than the Public Health England data from 2014 and the latest British HIV Association audit using data from 2009.

  10. Five Rings: Enclosing the London 2012 Olympic Games

    Directory of Open Access Journals (Sweden)

    Jonathan William Gardner

    2013-08-01

    Full Text Available Considering the successive iterations of the fence surrounding the London 2012 Olympic site in Stratford, east London, I demonstrate that during the five periods of enclosure considered, these boundaries have highlighted the London Games’ contested past, present, and future. An examination of the material and discursive constructions of each of these boundaries shows the Janus-faced nature of their relationship to the wider ‘mega-event’. I conclude that though the purpose of such enclosures may initially seem obvious, in actuality they, as parts of a wider assemblage, can act unpredictably both to support and challenge the Olympic brand and its existence in this part of east London.

  11. Connected or informed?: Local Twitter networking in a London neighbourhood

    Directory of Open Access Journals (Sweden)

    John Bingham-Hall

    2015-08-01

    Full Text Available This paper asks whether geographically localised, or ‘hyperlocal’, uses of Twitter succeed in creating peer-to-peer neighbourhood networks or simply act as broadcast media at a reduced scale. Literature drawn from the smart cities discourse and from a UK research project into hyperlocal media, respectively, take on these two opposing interpretations. Evidence gathered in the case study presented here is consistent with the latter, and on this basis we criticise the notion that hyperlocal social media can be seen as a community in itself. We demonstrate this by creating a network map of Twitter followers of a popular hyperlocal blog in Brockley, southeast London. We describe various attributes of this network including its average degree and clustering coefficient to suggest that a small and highly connected cluster of visible local entities such as businesses form a clique at the centre of this network, with individual residents following these but not one another. We then plot the locations of these entities and demonstrate that sub-communities in the network are formed due to close geographical proximity between smaller sets of businesses. These observations are illustrated with qualitative evidence from interviews with users who suggest instead that rather than being connected to one another they benefit from what has been described as ‘neighbourhood storytelling’. Despite the limitations of working with Twitter data, we propose that this multi-modal approach offers a valuable way to investigate the experience of using social media as a communication tool in urban neighbourhoods.

  12. James Henry Greathead and the London Underground

    Directory of Open Access Journals (Sweden)

    Laurence Wright

    2017-01-01

    Full Text Available This article investigates the origins and early history of the device known as the ‘Greathead Shield’, an important innovation in Victorian engineering crucial to constructing the London Underground. The aim is to explore the basis on which, many years later, a South African engineer, James Henry Greathead, was accorded prominent public acknowledgment, in the form of a statue, for ‘inventing’ the Shield. From a cultural studies perspective, how is the meaning of ‘invention’ to be understood, given that several other brilliant engineers were involved? The question is adjudicated using the notion of cultural ‘extelligence’, seen in relation to several contemporary and historical accounts, including Greathead’s own record of his achievements in the proceedings of the Institution of Civil Engineers and presented in The City and South London Railway (1896, edited by James Forrest. The paper was first delivered at the conference on ‘Novelty and Innovation in the Nineteenth Century’ held at the North-West University in May 2016.

  13. PRIORITY BASED UPLINK SCHEDULER FOR IEEE 802.16 NETWORKS

    Directory of Open Access Journals (Sweden)

    Gurpreet Singh,

    2011-06-01

    Full Text Available IEEE 802.16, the standard for fixed, portable and mobile Broadband Wireless Access (BWA systems, is promising to support different classes of traffic with Quality of Service (QoS. The Medium Access Control (MAC protocol defines a wide variety of mechanisms for bandwidth allocation and QoS provision. However, the details of how to schedule traffic are left unspecified. In this paper, we propose ascheduling strategy for uplink traffic. Simulation results show that our scheme is capable to provide required QoS.

  14. 15th IEEE International Conference on Intelligent Engineering Systems

    CERN Document Server

    Živčák, Jozef; Aspects of Computational Intelligence Theory and Applications

    2013-01-01

    This volume covers the state-of-the art of the research and development in various aspects of computational intelligence and gives some perspective directions of development. Except the traditional engineering areas that contain theoretical knowledge, applications, designs and projects, the book includes the area of use of computational intelligence in biomedical engineering. „Aspects of Computational Intelligence: Theory and Applications” is a compilation of carefully selected extended papers written on the basis of original contributions presented at the 15th IEEE International Conference on Intelligent Engineering Systems 2011, INES 2011 held at June 23.-26. 2011 in AquaCity Poprad, Slovakia.    

  15. 基于IEEE1149.7的TAP控制器命令研究%Commands of TAP controller based on IEEE1149.7

    Institute of Scientific and Technical Information of China (English)

    江坤; 高俊强

    2013-01-01

    随着待测芯片的集成度越来越高,IEEE 1149.1标准已很难满足芯片设计对测试与调试的要求.IEEE1149.7标准在保持与IEEE1149.1兼容的基础上增加了新功能,提供了一种全新的双引脚测试与调试方法.目前对IEEE1149.7的研究处于起步阶段,所以研究支持其的控制器命令对今后的发展具有重要的意义.本文在深入研究IEEE 1149.7标准的基础上,利用Quartus Ⅱ开发平台设计了基于TAP控制器命令的测试控制器,并进行了仿真验证.结果表明产生的命令测试信号符合IEEE 1149.7标准对TAP控制器命令的规定.%With the increasing integration of test chip,IEEE 1149.1 has been difficult to meet the requirements of the chip testing and designing.Being compatible with IEEE 1149.1,IEEE 1149.7 provides a new two-pin test and debug methods.Because IEEE 1149.7 is still in the initial stage,to study its commands of controller is of great significance on the future development of IEEE 1149.7.This paper is based on the deep study of IEEE 1149.7 standard,to design a test controller based on the commands of TAP controller by using QuartusⅡ platform and perform simulation verification.The result shows that the test signal generated by the controller can meet the requirements of IEEE 1149.7.

  16. Extending Service Area of IEEE 802.11 Ad Hoc Networks

    Science.gov (United States)

    Choi, Woo-Yong

    2012-06-01

    According to the current IEEE 802.11 wireless LAN standards, IEEE 802.11 ad hoc networks have the limitation that all STAs (Stations) are in the one-hop transmission range of each other. In this paper, to alleviate the limitation of IEEE 802.11 ad hoc networks we propose the efficient method for selecting the most appropriate pseudo AP (Access Point) from among the set of ad hoc STAs and extending the service area of IEEE 802.11 ad hoc networks by the pseudo AP's relaying the internal traffic of IEEE 802.11 ad hoc networks. Numerical examples show that the proposed method significantly extends the service area of IEEE 802.11 ad hoc networks.

  17. UK academics share their thoughts on Hinkley Point C

    Energy Technology Data Exchange (ETDEWEB)

    Dalton, David [NucNet, Brussels (Belgium)

    2016-10-15

    The proposed Hinkley Point C nuclear power plant project has experienced controversy in the public since its inception. However the proposed Hinkley plant has many benefits. It will be the biggest construction site in Europe, providing 25,000 jobs. It will generate low carbon energy, providing enough power for six million homes, and supplying seven per cent of the UK's electricity needs over its 60 year lifetime. Six experts from Imperial College London, one of Europe's top science-based universities, give their opinions on Hinkley Point C.

  18. Remarks at Thomson Reuters Newsmaker Event, London, U.K., June 19, 2013

    OpenAIRE

    Kim, Jim Yong

    2013-01-01

    Jim Yong Kim, President of the World Bank Group, discusses climate change as being a fundamental threat to economic development and the fight against poverty. He releases the new climate change report “Climate Extremes: Regional Impacts and the Case for Resilience” which talks about the challenges we’d be facing if the global temperature rose by two degrees Celsius. He talks about developing tools that help countries better assess and adapt to climate change, including greenhouse gas emiss...

  19. Marketing lifestyle drugs==>to consumers = increased market share. 7-8 September 1999, London, UK.

    Science.gov (United States)

    Gianfrate, F

    1999-11-01

    This conference focused on 'lifestyle' drugs, the kind of medicines treating conditions not considered as diseases, such as erectile dysfunction, male baldness, stress, etc, to improve quality of life and well-being. The lifestyle area is the fastest growing area in pharmaceuticals, driven by drugs such as Viagra (sildenafil; Pfizer Inc), Propecia (finasteride; Merck & Co Inc), Xenical (orlistat; F Hoffmann-La Roche Ltd) and others. The aging population in developed countries has a new perception of health, which is an improvement of wellness. Patients are more informed and conscious about their own health and the higher involvement in copayment and decision-making are changing pharmaceutical markets and, consequently, pharmaceutical industry's business and R&D strategies. Successful marketing of lifestyle drugs requires taking into account the above scenario, using new communication tools and being able to re-think the conventional marketing strategies adopted so far.

  20. Highlights from Faraday Discussion 184: Single-Molecule Microscopy and Spectroscopy, London, UK, September 2015.

    Science.gov (United States)

    Gellings, E; Faez, S; Piatkowski, L

    2016-02-07

    The 2015 Faraday Discussion on single-molecule microscopy and spectroscopy brought together leading scientists involved in various topics of single-molecule research. It attracted almost a hundred delegates from a broad spectrum of backgrounds and experience levels - from experimentalists to theoreticians, from biologists to materials scientists, from masters students to Nobel Prize Laureates. The meeting was merely a reflection of how big of an impact the ability to detect individual molecules has had on science over the past quarter of a century. In the following we give an overview of the topics covered during this meeting and briefly highlight the content of each presentation.

  1. UK victims of trafficking

    Directory of Open Access Journals (Sweden)

    Bob Burgoyne

    2006-05-01

    Full Text Available Analysis of court cases shows how hard it is forvictims of trafficking to win the right to remain in the UK. Case law is inconsistent and more research and data collection are urgently needed.

  2. Alcohol gel ingestion amongst homeless Eastern and Central Europeans in\\ud London: assessing the effects on cognitive functioning and psychological health

    OpenAIRE

    Soar, Kirstie; Papaioannou, G.; Dawkins, Lynne

    2016-01-01

    Background: Intentional consumption of alcohol based hand gels has been reported\\ud especially amongst non-UK national, alcohol dependent, homeless individuals in\\ud London. Whilst alcohol misuse is known to be associated with impaired cognitive\\ud functioning and mental health problems, the effects of additional ingestion of alcohol gel\\ud are unknown. Objectives: To explore cognitive and psychological functioning in users\\ud who intentionally ingest alcohol gel compared with ethyl-alcohol o...

  3. The First IEEE International Symposium On Industrial Electronics Held in Xi'an

    Institute of Scientific and Technical Information of China (English)

    1992-01-01

    The First IEEE International symposium on Industrial Electronics (ISIE) was held at Holiday Inn,xian, P.R.China on May 25-29,1992. The symposium was jointly sponsored by the IEEE Industrial Electronics Society(IES), the IEEE Beijing Section, the Society of Instrument and Control Engineers((?)pan), and the Shaanxi Provincial science and Technology Commission, in cooperation with Northwestern Polytechnieal University(NPU), Xian Jiaotong University and Xidian University.

  4. Wireless Coexistence between IEEE 802.11- and IEEE 802.15.4-Based Networks: A Survey

    OpenAIRE

    2011-01-01

    As more and more wireless devices use the 2.4 GHz radio spectrum, the coexistence of 2.4 GHz wireless devices operating in one place has become a hot topic. With low transmit power, the widely deployed IEEE 802.15.4-based networks are easily interfered with by other 2.4 GHz wireless networks, such as IEEE 802.11. IEEE 802.15.4-based wireless networks have paid great attention to the coexistence between themselves and with other non-IEEE 802.15.4 wireless networks. This problem has been furthe...

  5. Effective Bandwidth Utilization in IEEE802.11 for VOIP

    CERN Document Server

    Bhanu, S Vijay; Balakrishnan, V

    2010-01-01

    Voice over Internet protocol (VoIP) is one of the most important applications for the IEEE 802.11 wireless local area networks (WLANs). For network planners who are deploying VoIP over WLANs, one of the important issues is the VoIP capacity. VoIP bandwidth consumption over a WAN is one of the most important factors to consider when building a VoIP infrastructure. Failure to account for VoIP bandwidth requirements will severely limit the reliability of a VoIP system and place a huge burden on the WAN infrastructure. Less bandwidth utilization is the key reasons for reduced number of channel accesses in VOIP. But in the QoS point of view the free bandwidth of atleast 1-5% will improve the voice quality. This proposal utilizes the maximum bandwidth by leaving 1-5% free bandwidth. A Bandwidth Data rate Moderation (BDM) algorithm has been proposed which correlates the data rate specified in IEEE802.11b with the free bandwidth. At each time BDM will calculate the bandwidth utilization before sending the packet to i...

  6. Vulnerability and Attack of Routing Protocol in IEEE 802.11s%IEEE802.11s路由协议漏洞与攻击

    Institute of Scientific and Technical Information of China (English)

    杜尚鑫; 易平; 罗庆华

    2012-01-01

    IEEE802.11s是IEEE关于无线Mesh网络的规范。802.1ls虽然沿用了IEEE802.11i的安全规范,但是对于路由协议的安全并没有做过多的定义,由此产生了一定的安全隐患。文章分析了IEEE802.11s标准f草案)中的路由协议的漏洞,并针对IEEE802.1ls中使用的混合无线网状网协议(Hybrid WirelessMesh Protocol,HWMP)设计了两种攻击方式,从而破坏无线网状网络的可用性。通过在自行设计的路由器平台上实现无线攻击,并分析攻击对网络造成的影响来验证安全漏洞的存在性和可利用性。%IEEE802.1 l s is the IEEE specification of wireless Mesh network. Although 802.11s follows the IEEE 802.11i security specification, there is no much specification for routing protocol security. The routing protocol vulnerabilities in IEEE802.1 Is standard(draft) are analyzed, and two kinds of attacks aiming at HWMP(Hybrid Wireless Mesh Protocol) routing protocol used in the IEEE 802.11s are designed, thus to undermine the availability of wireless Mesh network. This paper analyzes the impact of attacks on wireless network and tells of the existence and utilizability of security vulnerability.

  7. Capacity and performance study of IEEE 802.11e in WLANs and ad hoc networks

    OpenAIRE

    Mjøberg, Frank Roar

    2007-01-01

    This master thesis focuses on the IEEE 802.11e Enhanced Distribution Channel Access (EDCA). The IEEE 802.11e protocol became an IEEE standard in November 2005 and is a very popular research topic. Even though the protocol has been tested for faults and errors a long time there are still research topics to explore. This thesis will try to answer some of those topics. The main topic in this thesis is how the IEEE 802.11e MAC operates in a multihop ad hoc network. We discuss and evaluated th...

  8. Capacity and performance study of IEEE 802.11e in WLANs and ad hoc networks

    OpenAIRE

    Mjøberg, Frank Roar

    2007-01-01

    This master thesis focuses on the IEEE 802.11e Enhanced Distribution Channel Access (EDCA). The IEEE 802.11e protocol became an IEEE standard in November 2005 and is a very popular research topic. Even though the protocol has been tested for faults and errors a long time there are still research topics to explore. This thesis will try to answer some of those topics. The main topic in this thesis is how the IEEE 802.11e MAC operates in a multihop ad hoc network. We discuss and evaluated th...

  9. Proceedings of IEEE Workshop on Machine Learning for Signal Processing XIV

    DEFF Research Database (Denmark)

    Larsen, Jan

    This proceeding contains refereed papers presented at the fourteenth IEEE Workshop on Machine for Signal Processing (MLSP’2004), held at S\\~ao Luís, Maranh\\~ao, Brazil, September 29-October 1, 2004. This is a continuation of the IEEE workshops on Neural Networks for Signal Processing (NNSP...... by the Machine Learning for Signal Processing Technical Committee with sponsorship of the IEEE Signal Processing Society. Following the practice started last year, the bound volume of the proceedings is going to be published by IEEE following the workshop, and we are pleased to offer to conference attendees...

  10. Proceedings of IEEE Workshop on Machine Learning for Signal Processing XIV

    DEFF Research Database (Denmark)

    Larsen, Jan

    This proceeding contains refereed papers presented at the fourteenth IEEE Workshop on Machine for Signal Processing (MLSP’2004), held at S\\~ao Luís, Maranh\\~ao, Brazil, September 29-October 1, 2004. This is a continuation of the IEEE workshops on Neural Networks for Signal Processing (NNSP...... by the Machine Learning for Signal Processing Technical Committee with sponsorship of the IEEE Signal Processing Society. Following the practice started last year, the bound volume of the proceedings is going to be published by IEEE following the workshop, and we are pleased to offer to conference attendees...

  11. IEEE 802.11 5GHz标准物理层研究

    Institute of Scientific and Technical Information of China (English)

    潘翔; 欧阳红升; 高泽华; 高峰

    2013-01-01

    IEEE 802.115GHz技术标准及相关设备的逐步成熟,使得5GHz WLAN网络建设成为可能.文章研究并分析了IEEE 802.11a、IEEE 802.11n、IEEE 802.11ac等5GHz WLAN标准的技术发展路径,并对其物理层关键技术及各标准所支持的最高数据速率作了重点分析.

  12. Changing the Subject: English in London, 1945-1967

    Science.gov (United States)

    Yandell, John

    2014-01-01

    Two recent books, "English Teachers in a Postwar Democracy: Emerging Choice in London Schools, 1945-1965" and "The London Association for the Teaching of English, 1947-67: A History," explore an important period in the development of English as a school subject and in the remaking of the professional identity of English…

  13. Alternative Spaces of Learning in East London: Opportunities and Challenges

    Science.gov (United States)

    Sneddon, Raymonde; Martin, Peter

    2012-01-01

    This article emerges from an ongoing exploration into how British minority ethnic communities in the London area create spaces in community-based programs to maintain or develop their languages and literacies. In London, more than one-third of the 850,000 school children speak a language other than English at home (Baker & Eversley, 2000).…

  14. Changing the Subject: English in London, 1945-1967

    Science.gov (United States)

    Yandell, John

    2014-01-01

    Two recent books, "English Teachers in a Postwar Democracy: Emerging Choice in London Schools, 1945-1965" and "The London Association for the Teaching of English, 1947-67: A History," explore an important period in the development of English as a school subject and in the remaking of the professional identity of English…

  15. Spatial and temporal associations of road traffic noise and air pollution in London: Implications for epidemiological studies.

    Science.gov (United States)

    Fecht, Daniela; Hansell, Anna L; Morley, David; Dajnak, David; Vienneau, Danielle; Beevers, Sean; Toledano, Mireille B; Kelly, Frank J; Anderson, H Ross; Gulliver, John

    2016-03-01

    Road traffic gives rise to noise and air pollution exposures, both of which are associated with adverse health effects especially for cardiovascular disease, but mechanisms may differ. Understanding the variability in correlations between these pollutants is essential to understand better their separate and joint effects on human health. We explored associations between modelled noise and air pollutants using different spatial units and area characteristics in London in 2003-2010. We modelled annual average exposures to road traffic noise (LAeq,24h, Lden, LAeq,16h, Lnight) for ~190,000 postcode centroids in London using the UK Calculation of Road Traffic Noise (CRTN) method. We used a dispersion model (KCLurban) to model nitrogen dioxide, nitrogen oxide, ozone, total and the traffic-only component of particulate matter ≤2.5μm and ≤10μm. We analysed noise and air pollution correlations at the postcode level (~50 people), postcodes stratified by London Boroughs (~240,000 people), neighbourhoods (Lower layer Super Output Areas) (~1600 people), 1km grid squares, air pollution tertiles, 50m, 100m and 200m in distance from major roads and by deprivation tertiles. Across all London postcodes, we observed overall moderate correlations between modelled noise and air pollution that were stable over time (Spearman's rho range: |0.34-0.55|). Correlations, however, varied considerably depending on the spatial unit: largest ranges were seen in neighbourhoods and 1km grid squares (both Spearman's rho range: |0.01-0.87|) and was less for Boroughs (Spearman's rho range: |0.21-0.78|). There was little difference in correlations between exposure tertiles, distance from road or deprivation tertiles. Associations between noise and air pollution at the relevant geographical unit of analysis need to be carefully considered in any epidemiological analysis, in particular in complex urban areas. Low correlations near roads, however, suggest that independent effects of road noise and

  16. Coexistence of IEEE 802.11b/g WLANs and IEEE 802.15.4 WSNs: Modeling and Protocol Enhancements

    OpenAIRE

    Yuan, W.

    2011-01-01

    As an emerging short-range wireless technology, IEEE 802.15.4/ZigBee Wireless Sensor Networks (WSNs) are increasingly used in the fields of home control, industrial control, consumer electronics, energy management, building automation, telecom services, personal healthcare, etc. IEEE 802.15.4/Zig-Bee WSNs share the same 2.4 GHz license-free Industrial, Scientific, and Medical (ISM) band with many other wireless systems such as IEEE 802.11b/g WLANs, Bluetooth, cordless phones, etc. Due to the ...

  17. Coexistence of IEEE 802.11b/g WLANs and IEEE 802.15.4 WSNs: Modeling and Protocol Enhancements

    OpenAIRE

    Yuan, W.

    2011-01-01

    As an emerging short-range wireless technology, IEEE 802.15.4/ZigBee Wireless Sensor Networks (WSNs) are increasingly used in the fields of home control, industrial control, consumer electronics, energy management, building automation, telecom services, personal healthcare, etc. IEEE 802.15.4/Zig-Bee WSNs share the same 2.4 GHz license-free Industrial, Scientific, and Medical (ISM) band with many other wireless systems such as IEEE 802.11b/g WLANs, Bluetooth, cordless phones, etc. Due to the ...

  18. Implementation of CRC in IEEE1394 Based on Verilog HDL%基于Verilog HDL的IEEE1394协议中CRC校验的实现

    Institute of Scientific and Technical Information of China (English)

    张艳; 李现国

    2009-01-01

    CRC是IEEE1394协议中重要的错误检测和恢复机制.介绍循环冗余校验的基本原理,根据IEEE1394协议中CRC码的产生原理,分析CRC校验的具体计算过程,讨论IEEE1394协议中CRC的FPGA实现.借助EDA工具和Verilog HDL语言实现了对这种算法的仿真和验证.

  19. IEEE-PSES中国首届研讨会在京举行%IEEE PSES first seminar was held in Beijing

    Institute of Scientific and Technical Information of China (English)

    郝丽娟

    2010-01-01

    @@ 近日,IEEE-PSES(电气电子工程师学会,产品安全工程师分会)中国首届研讨会在京举行.本次会议由IEEE-PSES主办,中国质量认证中心(CQC)承办.来自IEEE-PSES、IECTC108及检测、认证等相关行业的有关领导和专家共计百余人出席了本次会议.

  20. Leading increasingly linguistically diverse London schools

    Directory of Open Access Journals (Sweden)

    Dina Mehmedbegović

    2008-10-01

    Full Text Available Engaging with bilingual parents, students and teachers with little awareness of the benefits of bilingualism has initiated a search for factors resulting in the low value attached to certain types of bilingualism. Working on the hypothesis that prevalent practice is influenced more by attitudes to bilingualism rather than relevant research and pedagogical theory, this research focuses on attitudes. This small-scale qualitative study conducted with a group of London headteachers provides an insight into the attitudes to bilingualism and how they impact on policy and practice in schools with significant proportions of multilingual learners. It also raises the question if schools which claim to support multilingual students in realising their full potential can achieve that without including home languages as an integral part of learning.

  1. Turner's prize[London transport policy

    Energy Technology Data Exchange (ETDEWEB)

    Sherrington, M.

    2000-10-26

    The article describes Ken Livingstone's plans for solving London's traffic problems: Derek Turner will be 'in charge of the capital's streets' but Livingstone will chair the board meetings. The radical new scheme will apply to both the Greater London Authority, its transport branch Transport for London (TfL) and 33 London Boroughs. Within TfL there is a core division called 'street management services' which has five area teams for day-to-day street management including road maintenance and street lighting. Other departments are communications, support services, traffic technology services, service development and performance, a London bus department and a department concentrating on congestion charging. There are plans to support pedestrians and cyclists but 'bus travel is really what it is all about'.

  2. Congressional Science Fellow tackles science policy for U.K.

    Science.gov (United States)

    Moses, Julie J.

    After an AGU Congressional Science Fellowship in 1997-1998,I decided to pursue science policy further. I spied an ad in the Sunday Washington Post advertising for someone with a science degree, who also had knowledge of the United Kingdom, and science policy experience on Capitol Hill. In addition to my Ph.D. from the University of California at Los Angeles and the Congressional Science Fellowship, I had spent two years in the U.K. as a post-doc at Queen Mary and Westfield College in London.I applied for the job, which was at the British Embassy in Washington, D.C., and was hired. The UK Foreign Office has a tradition of hiring many of its embassy staff locally; they consider knowledge of local politics and issues very use ful for their interests. Now I cover hard science issues, including space and the Internet for Her Majesty's Government.

  3. Benefits of IEEE-754 features in modern symmetric tridiagonaleigensolvers

    Energy Technology Data Exchange (ETDEWEB)

    Marques, Osni; Riedy, Jason E.; Vomel, Christof

    2006-03-12

    Bisection is one of the most common methods used to compute the eigenvalues of symmetric tridiagonal matrices. Bisection relies on the Sturm count: For a given shift a, the number of negative pivots in the factorization T - {sigma}I = LDL{sup T} equals the number of eigenvalues of T that are smaller than a. In IEEE-754 arithmetic, the value oo permits the computation to continue past a zero pivot, producing a correct Sturm count when T is unreduced. Demmel and Li showed that using oo rather than testing for zero pivots within the loop could significantly improve performance on certain architectures. When eigenvalues are to be computed to high relative accuracy, it is often preferable to work with LDL{sup T} factorizations instead of the original tridiagonal T. One important example is the MRRR algorithm. When bisection is applied to the factored matrix, the Sturm count is computed from LDL{sup T} which makes differential stationary and progressive qds algorithms the methods of choice. While it seems trivial to replace T by LDL{sup T}, in reality these algorithms are more complicated: In IEEE-754 arithmetic, a zero pivot produces an overflow followed by an invalid exception (NaN, or 'Not a Number') that renders the Sturm count incorrect. We present alternative, safe formulations that are guaranteed to produce the correct result. Benchmarking these algorithms on a variety of platforms shows that the original formulation without tests is always faster provided that no exception occurs. The transforms see speed-ups of up to 2.6x over the careful formulations. Tests on industrial matrices show that encountering exceptions in practice is rare. This leads to the following design: First, compute the Sturm count by the fast but unsafe algorithm. Then, if an exception occurs, recompute the count by a safe, slower alternative. The new Sturm count algorithms improve the speed of bisection by up to 2x on our test matrices. Furthermore, unlike the traditional tiny

  4. 基于IEEE P1687的可变扫描链设计%Design of Flexible Scan-chain Based on IEEE P1687

    Institute of Scientific and Technical Information of China (English)

    刘洋; 颜学龙

    2012-01-01

    在系统芯片SoC中,嵌入式仪器的应用越来越广泛;如何利用已经获得广泛应用的IEEE 1149.1测试访问端口(TAP)实现对嵌入式仪器的访问成为一个新的问题;IEEE P1687 (IJTAG)建议标准提供了一个连接TAP与片上嵌入式仪器的界面标准;其特点是在扫描链中插入SIB使得在嵌入式仪器网络设计和嵌入式仪器的访问中扫描链具有灵活可变的特性;介绍了IEEE P1687标准,分析了IEEE 1149.1在嵌入式仪器访问应用中的缺点及IEEE P1687的优势,并设计实现了SIB的功能,给出了P1687的单层与多层网络结构,并对所需功能进行了仿真验证证明方案可行.%In the testing of .system on chips (SoC) , Embedded instrument are becoming more widely used in test, debug and monitoring. How to use the widespread IEEE 1149. 1 Standard Test Access Port as the interface for accessing embedded instrument becomes a new issue. The IEEE P1687 (IJTAG) standard proposal aims at providing a standardized interface between the IEEE Standard 1149. 1 test access port (TAP) and on -chip embedded instrument. A key feature in P1687 is to include Segment Insertion Bits (SIBs) in the scan-path to allow flexibility both in designing the instrument access network and in scheduling the access to instruments. This paper presents the IEEE P1687 standard, analyses the background of IEEE 1149. 1 and prior work of IEEE P1687, designed the SIB, the flat and hierarchical architecture.

  5. 利用CSP方法对IEEE802.11w形式化分析%Using CSP for formal analysis of IEEE 802.11w protocol

    Institute of Scientific and Technical Information of China (English)

    吴名欢; 程小辉; 李雄伟

    2015-01-01

    IEEE 802.11w authentication protocol based on the IEEE 802.11i enhances the IEEE 802.11i security for man-agement frames.In order to study the safety of the protocol, this paper modeled the protocol by formal analysis using communi-cating sequential processes (CSP ).This paper chosed the role of protocol and the attacker for modelling and verification.It used CSP for modelling and performed the verification using FDR.In the experiments, it found an attack in this protocol.It checked authentication and security attributes and discovered the middleman attack case.It can provide a reference to improve the safety of IEEE 802.11w help.%运行在 IEEE 802.11i 基础上的 IEEE 802.11w 增加了对无线网络管理帧的保护,针对 IEEE 802.11w 协议的安全性问题,利用了通信顺序进程(CSP)对其进行形式化分析。对协议运行在恶意环境中,存在攻击者的情况下,利用 CSP 方法建立了攻击者和协议主体的 CSP 进程模型。使用模型检测工具故障发散改进器(FDR)进行仿真实验,对协议的认证和安全属性进行了校验,发现该协议存在中间人攻击情况,为提高 IEEE 802.11w的安全性提供了帮助。

  6. WIH-based IEEE 802.11 ECG monitoring implementation.

    Science.gov (United States)

    Moein, A; Pouladian, M

    2007-01-01

    New wireless technologies make possible the implementation of high level integration wireless devices which allow the replacement of traditional large wired monitoring devices. It offers new functionalities to physicians and will reduce the costs. Among these functionalities, biomedical signals can be sent to other devices (PDA, PC . . . ) or processing centers, without restricting the patients' mobility. This article discusses the WIH (Ward-In-Hand) structure and the software required for its implementation before an operational example is presented with its results. The aim of this project is the development and implementation of a reduced size electrocardiograph based on IEEE 802.11 with high speed and more accuracy, which allows wireless monitoring of patients, and the insertion of the information into the Wi-Fi hospital networks.

  7. The New Standard IEEE 1599, Introduction and Examples

    Directory of Open Access Journals (Sweden)

    Denis L. Baggi

    2009-02-01

    Full Text Available IEEE 1599 is a new standard to encode music with XML symbols. It offers two important original characteristics compared to existing standards of the worlds of music, musicology and computer applications to this art and science. On one side, the encoding is in the form of symbols that can be read both by machines and humans. On the other, it allows the realization of applications in which all aspects of music, such as audio and sound, graphical representation, historical data, performance indications, represented thanks to the new concept of layers, are fully integrated, synchronized and can be accessed both individually and as parts of a whole. The article will give a brief description of the standard and of applications that have been built to show its power.

  8. Proceedings of the IEEE Machine Learning for Signal Processing XVII

    DEFF Research Database (Denmark)

    , and two papers from the winners of the Data Analysis Competition. The program included papers in the following areas: genomic signal processing, pattern recognition and classification, image and video processing, blind signal processing, models, learning algorithms, and applications of machine learning......The seventeenth of a series of workshops sponsored by the IEEE Signal Processing Society and organized by the Machine Learning for Signal Processing Technical Committee (MLSP-TC). The field of machine learning has matured considerably in both methodology and real-world application domains and has....... The program featured a Special Session on Genomic Signal Processing, chaired by Prof. Man-Wai Mak from Hong Kong Polytechnic University, Hong Kong. The session included four refereed papers by leading experts in the field. We also continued the tradition of the Data Analysis Competition thanks to the efforts...

  9. IEEE 802.11 Wireless LAN Security White Paper

    Energy Technology Data Exchange (ETDEWEB)

    King, J

    2001-10-22

    Given the increased productivity and growing popularity of wireless communications in general, and wireless data communications in particular, this paper outlines the protocols, security implications, and architectures of IEEE Std. 802.11-1999 wireless LANs (WLANs) and makes recommendations regarding a phased implementation of WLANs at LLNL. This project is driven by the need for convenient and secure access to the Internet for Laboratory visitors and to the internal network for Laboratory employees. A solid architecture designed with a priority on security will allow LLNL to offer network access in areas where it is traditionally hard to deploy wired networks. It will also enable such services as wireless access for inventory control and convenient network access for conference rooms around LLNL. Wireless network access has the potential to increase productivity by enabling instant access to information.

  10. Basic security measures for IEEE 802.11 wireless networks

    Directory of Open Access Journals (Sweden)

    Oscar P. Sarmiento

    2010-05-01

    Full Text Available This article presents a tutorial/discussion of three commonly-used IEEE 802.11 wireless network security standards: WEP, WPA and WPA2. A detailed analysis of the RC4 algorithm supporting WEP is presented, including its vulnera-bilities. The WPA and WPA2 encryption protocols’ most relevant aspects and technical characteristics are reviewed for a comparative analysis of the three standards in terms of the security they provide. Special attention has been paid to WEP encryption by using an educational simulation tool written in C++ Builder for facilitating the unders-tanding of this protocol at academic level. Two practical cases of wireless security configurations using Cisco net-working equipment are also presented: configuring and enabling WPA-Personal and WPA2-Personal (these being security options used by TKIP and AES, respectively.

  11. Review of the IEEE Standard for Computerized Operating Procedure Systems

    Energy Technology Data Exchange (ETDEWEB)

    O' Hara, J.; Higgins, J.

    2010-02-26

    Increasingly nuclear power plant procedures, such as emergency operating procedures, are being presented in computer form with functionality to support operator use and management of the procedures. The U.S. Nuclear Regulatory Commission (NRC) currently has guidance for the review of computer-based procedures (CBPs); however, there remain CBP functions and human performance issues for which up-to-date guidance is lacking. The Institute of Electrical and Electronics Engineers (IEEE) has initiated a standard development effort to address the human factors engineering (HFE) aspects of CBP systems. When completed, it may provide guidance to supplement the NRC staff's review criteria. The purpose of our study was to evaluate the suitability of the IEEE Standard for use in the NRC's HFE safety reviews of CBP systems and to ensure that the guidance meets the NRC's standard for scientific and engineering rigor used in its own guidance development efforts. We established the following criteria with which to evaluate the Standard: (1) it should meet an existing need of NRC reviewers, (2) it should be based in sound HFE principles, (3) it should be thoroughly peer-reviewed, and (4) it should address CBP-related human performance issues identified in the literature. This report describes the methodology we used to evaluate each criterion. Our evaluation concluded that the Standard generally does meet these criteria, however several areas were identified for which additional clarifications are needed. Thus consideration of the Standard's use by the NRC is supported. The standard evaluation methodology developed in this study can be generally applied to the review of other HFE standards being considered for possible use or endorsement by the NRC.

  12. Birthweight by gestational age and its effect on perinatal mortality in white and in Punjabi births: experience at a district general hospital in West London 1967-1975.

    Science.gov (United States)

    Dawson, I; Golder, R Y; Jonas, E G

    1982-11-01

    At Hillingdon Hospital in West London two main ethnic groups: 'UK' (i.e. white European) and 'Indian' (i.e. Punjabi) account for the bulk of obstetric work load. Birthweight by gestational age graphs were calculated for some 6000 Indian and 18000 UK infants born between 1967 and 1975 inclusive. A mean weight difference at term favoured UK male babies by 240 g and UK female babies by 230 g. Though the crude perinatal results in the two populations were not significantly different, the perinatal mortality of infants less than 2500 g in birthweight was lower in the Indian than the UK population, particularly in the 1500-2400 g group. This is attributed to a levelling off in intrauterine growth from 36 to 37 weeks gestation onwards in Indian compared with UK pregnancies, so that they were more mature than UK births of the same weight. However light-for-dates births, defined as birthweights below the 10th centile of weight-for-gestational age on their own ethnic and sex specific standards pose problems, irrespective of ethnic background.

  13. 基于IEEE 1588时间同步系统的硬件实现%Hardware Implementation of Time Synchronization System Based on IEEE 1588

    Institute of Scientific and Technical Information of China (English)

    曹禹; 邹磊; 时维铎; 周国平

    2013-01-01

      IEEE 1588是关于网络测量和控制系统的高精度时间协议标准,其时间同步精度能够达到次微秒级。首先分析了IEEE 1588时间同步原理,然后以LPC1768+DP83640的硬件结构实现了IEEE 1588时间同步系统,最后利用示波器测试了主从时钟的时间同步精度。设计结果表明可以满足当今电力系统对高精度时间同步的要求。%IEEE 1588 is a high precision time protocol standards about network measurement and control system, its time synchronization precision can reach sub-microsecond level. This paper first analyzes the principle of IEEE 1588 time synchronization, then realizes the IEEE 1588 time synchronization system with LPC1768 +DP83640. Finally, uses the oscilloscope to test the master -slave clock time synchronization precision. Its results show that it can meet the need of the current electric power system to realize high accuracy time synchronization.

  14. Research on IEEE 802.22.1 Beacon Networks Application%IEEE 802.22.1信标网络应用研究

    Institute of Scientific and Technical Information of China (English)

    杨大全

    2012-01-01

    Several IEEE 802.22.1 beacon devices are used to build beacon network by self-organization. IEEE 802.22.1 beacon protocol is introduced, and the decision strategies of beacon networks in the process of establishing and maintenance are discussed. IEEE 802.22.1 beacon networks sensing and information detection in WRAN device are introduced. The maximum latency before scheduling a quiet period that will ensure to capture the full information of the beacon network is given.%多个IEEE 802.22.1信标设备将自组织成信标网络.介绍了IEEE 802.22.1标准中定义的自组织方案;讨论了信标网络建立与维持过程中的判决策略;介绍了无线区域网络(WRAN)设备对IEEE 802.22.1信标网络的识别与信息获取机制;给出了确保实现对信标网络信息解析所需要安排的最大时延.

  15. Attacks on IEEE 802.11 wireless networks

    Directory of Open Access Journals (Sweden)

    Dejan Milan Tepšić

    2013-06-01

    Full Text Available Security of wireless computer networks was initially secured with the WEP security protocol, which relies on the RC4 encryption algorithm and the CRC algorithm to check the integrity. The basic problems of the WEP are a short initialization vector, unsafe data integrity checking, using a common key, the lack of mechanisms for management and exchange of keys, the lack of protection from the endless insertion of the same package into the network, the lack of authentication of access points and the like. The consequences of these failures are easy attacks against the WEP network, namely their complete insecurity. Therefore, the work began on the IEEE 802.11i protocol, which should radically improve the security of wireless networks. Since the development of a protocol lasted, the WPA standard was released to offset the security gap caused by the WEP. The WPA also relies on RC4 and CRC algorithms, but brings temporary keys and the MIC algorithm for data integrity. The 802.1X authentication was introduced and common keys are no longer needed, since it is possible to use an authentication server. The length of the initialization vector was increased and the vector is obtained based on the packet serial number, in order to prevent the insertion of the same packet into the network. The weakness of the WPA security mechanism is the use of a common key. WPA2 (802.11i later appeared. Unlike the WPA mechanism that worked on old devices with the replacement of software, WPA2 requires new network devices that can perform AES encryption. AES replaces the RC4 algorithm and delivers much greater security. Data integrity is protected by encryption. Despite progress, there are still weaknesses in wireless networks. Attacks for denial of service are possible as well as spoofing package headers attacks. For now, it is not advisable to use wireless networks in environments where unreliability and unavailability are not tolerated. Introduction In the entire history of

  16. A formal analysis of ISO/IEEE P11073-20601 standard of medical device communication

    NARCIS (Netherlands)

    Goga, Nicolae; Costache, Stefania; Moldoveanu, Florica

    2009-01-01

    This article presents the formal work done for the ISO/IEEE P11073-20601 Draft Standard for Health informatics - Personal health device communication - Application profile Optimized exchange protocol. ISO/IEEE 11073 family defines standards for device communication between agents (e.g. blood pressur

  17. Design Optimization of Cyber-Physical Distributed Systems using IEEE Time-sensitive Networks (TSN)

    DEFF Research Database (Denmark)

    Pop, Paul; Lander Raagaard, Michael; Craciunas, Silviu S.

    2016-01-01

    In this paper we are interested in safety-critical real-time applications implemented on distributed architectures supporting the Time-SensitiveNetworking (TSN) standard. The ongoing standardization of TSN is an IEEE effort to bring deterministic real-time capabilities into the IEEE 802.1 Ethernet...

  18. Air quality and public health impacts of UK airports. Part II: Impacts and policy assessment

    Science.gov (United States)

    Yim, Steve H. L.; Stettler, Marc E. J.; Barrett, Steven R. H.

    2013-03-01

    The potential adverse human health impacts of emissions from UK airports have become a significant issue of public concern. We produce an inventory of UK airport emissions - including emissions from aircraft landing and takeoff operations, aircraft auxiliary power units (APUs) and ground support equipment (GSE) - with quantified uncertainty. Emissions due to more than 95% of UK passenger enplanements are accounted for. We apply a multi-scale air quality modelling approach to assess the air quality impacts of UK airports. Using a concentration-response function we estimate that 110 (90% CI: 72-160) early deaths occur in the UK each year (based on 2005 data) due to UK airport emissions. We estimate that up to 65% of the health impacts of UK airports could be mitigated by desulphurising jet fuel, electrifying GSE, avoiding use of APUs and use of single engine taxiing. Two plans for the expansion of UK airport capacity are examined - expansion of London Heathrow and new hub airport in the Thames Estuary. Even if capacity is constrained, we find that the health impacts of UK airports still increases by 170% in 2030 due to an increasing and aging population, increasing emissions, and a changing atmosphere. We estimate that if Heathrow were to be expanded as per previous UK Government plans, UK-wide health impacts in 2030 would increase by 4% relative to the 2030 constrained case, but this increase could become a 48% reduction if emissions mitigation measures were employed. We calculate that 24% of UK-wide aviation-attributable early deaths could be avoided in 2030 if Heathrow were replaced by a new airport in Thames Estuary because the location is downwind of London, where this reduction occurs notwithstanding the increase in aircraft emissions. A Thames hub airport would (isolated from knock-on effects at other airports) cause 60-70% fewer early deaths than an expanded Heathrow, or 55-63% fewer early deaths than an unexpanded Heathrow. Finally, replacing Heathrow by a

  19. Non-European nurses' perceived barriers to UK nurse registration.

    Science.gov (United States)

    Allan, Helen; Westwood, Sue

    2016-05-11

    Aim To conduct a scoping project to identify perceived barriers to UK nurse registration as experienced by internationally educated nurses working as healthcare assistants in the UK. Method Eleven internationally educated nurses working as healthcare assistants in two London hospitals attended two facilitated focus groups. Qualitative thematic analysis was used to analyse the data. Findings Study participants articulated frustration with UK English language testing requirements and a sense of injustice and unfairness relating to: double standards for nurses educated within and outside of the European Union (EU) and European Economic Area (EEA); and what was perceived, by some, as arbitrary English language testing with unnecessarily high standards. Differences among study participants related to issues of competency and accountability regarding English language skills and passing English language skills tests, with many feeling they were playing 'a game' where the rules kept changing. Conclusion Language testing barriers are impeding UK nurse registration for some internationally educated nurses from outside the EU and EEA who, as a result, are working as healthcare assistants. The provision of English language training by employers would improve their prospects of achieving nurse registration.

  20. UK Frac Sand Resources

    OpenAIRE

    Mitchell, C J

    2015-01-01

    Although still just a glimmer in the gas man’s eye, the prospect of shale hydrocarbon (oil and gas) development in the UK has many companies thinking about the industrial minerals it will require. Chief amongst these is silica sand which is used as a ‘proppant’ in the hydraulic fracturing, or ‘fracking’, of shales to help release the gas. The UK has large resources of sand and sandstone, of which only a small proportion have the necessary technical properties that classify them as ‘silica san...

  1. Proceedings of the IEEE 2003 Neural Networks for Signal Processing Workshop

    DEFF Research Database (Denmark)

    Larsen, Jan

    This proceeding contains refereed papers presented at the thirteenth IEEE Workshop on Neural Networks for Signal Processing (NNSP’2003), held at the Atria-Mercure Conference Center, Toulouse, France, September 17-19, 2003. The Neural Networks for Signal Processing Technical Committee of the IEEE...... Signal Processing Society organized the workshop with sponsorship of the Signal Processing Society and the co-operation of the IEEE Neural Networks Society. The IEEE Press published the previous twelve volumes of the NNSP Workshop proceedings in a hardbound volume. This year, the bound volume...... is to be published by IEEE following the workshop, and we are pleased to inaugurate a new CDROM electronic format, which maintains the same standard as the printed version and facilitates the reading and searching of the papers. In recent years, the field of neural networks has matured considerably in both...

  2. Proceedings of the IEEE 2003 Neural Networks for Signal Processing Workshop

    DEFF Research Database (Denmark)

    Larsen, Jan

    This proceeding contains refereed papers presented at the thirteenth IEEE Workshop on Neural Networks for Signal Processing (NNSP’2003), held at the Atria-Mercure Conference Center, Toulouse, France, September 17-19, 2003. The Neural Networks for Signal Processing Technical Committee of the IEEE...... Signal Processing Society organized the workshop with sponsorship of the Signal Processing Society and the co-operation of the IEEE Neural Networks Society. The IEEE Press published the previous twelve volumes of the NNSP Workshop proceedings in a hardbound volume. This year, the bound volume...... is to be published by IEEE following the workshop, and we are pleased to inaugurate a new CDROM electronic format, which maintains the same standard as the printed version and facilitates the reading and searching of the papers. In recent years, the field of neural networks has matured considerably in both...

  3. Lidar Observations of Pollution Transport From London to Rural Areas

    Science.gov (United States)

    Ricketts, Hugo; Vaughan, Geraint; Wareing, David

    2016-06-01

    The Clean Air for London (ClearfLo) Project took place in and around London, United Kingdom. The aim of the project was to learn how both atmospheric dynamics and chemistry affect air pollution in the south east of England. During the winter and summer of 2012 many different types of instrument including lidars were deployed throughout London city centre, suburbs and into rural areas. Amongst these instruments was the Boundary Layer Aerosol/Ozone Lidar owned by the National Centre for Atmospheric Sciences (NCAS) in the United Kingdom. Ozone and aerosol data are presented from data collected during July and August 2012 and compared to back trajectories to identify their origins.

  4. Teaching the History of Astronomy On Site in London

    Science.gov (United States)

    French, Linda M.

    2016-01-01

    In the autumn of 2014, the author had the opportunity to teach a class on the history of astronomy in England as part of a study abroad experience for students at Illinois Wesleyan University. The philosophy of the program is to use the rich cultural environment of London as a setting for active learning. In the classroom, students read and discussed selected works by Ptolemy, Copernicus, Kepler, Galileo, and Herschel. We visited Stonehenge, the Royal Greenwich Observatory, the London Science Museum, the London Monument, and the library of the Royal Astronomical Society. Lessons learned from the experience will be shared.

  5. Performance Analysis of IEEE 802.11 DCF and IEEE 802.11e EDCA in Non-saturation Condition

    Science.gov (United States)

    Kim, Tae Ok; Kim, Kyung Jae; Choi, Bong Dae

    We analyze the MAC performance of the IEEE 802.11 DCF and 802.11e EDCA in non-saturation condition where device does not have packets to transmit sometimes. We assume that a flow is not generated while the previous flow is in service and the number of packets in a flow is geometrically distributed. In this paper, we take into account the feature of non-saturation condition in standards: possibility of transmission performed without preceding backoff procedure for the first packet arriving at the idle station. Our approach is to model a stochastic behavior of one station as a discrete time Markov chain. We obtain four performance measures: normalized channel throughput, average packet HoL (head of line) delay, expected time to complete transmission of a flow and packet loss probability. Our results can be used for admission control to find the optimal number of stations with some constraints on these measures.

  6. 3-D GIS : Virtual London and beyond

    Directory of Open Access Journals (Sweden)

    Michael Batty

    2006-10-01

    Full Text Available In this paper, we outline how we have developed a series of technologies to enable detailed interactive 3-D Geographical Information Systems (GIS based models of cities to be created. Until relatively recently these models have been developed in Computer Aided Design (CAD software more often then in GIS. One of the main reasons was that ‘3-D GIS’ was often only 2.5-D under closer inspection. This is changing, and by straddling both technologies, and integrating others, we show how these models in turn enable planning information, statistics, pollution levels, sea level rises and much more to be visualised and analysed in the context of the 3-D city model. The client for ‘Virtual London’ is the Greater London Authority (GLA and their aim is to develop improved dissemination of planning information, which is explored. We then argue that virtual cities should go well beyond the traditional conceptions of 3-D GIS and CAD into virtual worlds and online design. But we also urge caution in pushing the digital message too far, showing how more conventional tangible media is always necessary in rooting such models in more realistic and familiar representations.

  7. Tracker electronics testing at Imperial College London

    CERN Document Server

    PPARC, UK

    2006-01-01

    Jonathon Fulcher and Rob Bainbridge testing a rack of CMS Tracker readout electronics at Imperial College London. The signals from the front end APV chips will be transmitted optically to racks of electronics ~100m away in an adjacent underground cavern where they are fed into ~20 crates where 500 CMS Front End Driver boards (FEDs) are located. The FED inputs are 8 fibre ribbons, each ribbon consisting of 12 fibres, each fibre carrying the serially multiplexed data originating from 2 APVs. To test the FEDs special tester boards have been designed to produce simulated APV data in optical form. In the picture the yellow cables are the fibres, which originate from the FED tester boards on the left hand side of the crate as 96 individual fibres, which are then combined into the 8 fibre ribbons feeding the FED board on the right hand side of the crate. Fig. 2 shows an APV25 test board mounted in the X-ray irradiation setup, Fig. 3 the X-ray machine where the chips are irradiated and Fig. 4 the MGPA (Multi-Gain Pre...

  8. Collider – the LHC in London

    CERN Multimedia

    Emma Sanders

    2013-01-01

    In November the London Science Museum will open a major new exhibition about the LHC. The project marks an ambitious new approach for the museum who will work with an eclectic design team that includes a video artist and a playwright. Both Olivier Award winners, they are more renowned for their work on stage and screen than inside museums.   Image courtesy of Science Museum / Nissen Richards Studio. The Science Museum team came to Geneva expecting to be blown away by the extraordinary physics and engineering at CERN and they weren’t disappointed. But what impressed them most was the people who made it all happen. Physicists of all kinds, restaurant staff, engineers, administrators, those working in transport and logistics, all had in common a passion for CERN and an enthusiasm for communicating their work. “What really struck us was how every single person mentioned the spirit of international collaboration and the importance of curiosity,” Alison Boyle told the ...

  9. Volatile organic compound fluxes and concentrations in London (ClearfLo)

    Science.gov (United States)

    Valach, Amy; Langford, Ben; Nemitz, Eiko; MacKenzie, Rob; Hewitt, Nick

    2014-05-01

    Volatile organic compounds (VOCs) from anthropogenic sources such as fuel combustion or evaporative emissions can directly and indirectly affect human health. Some VOCs, such as benzene and 1,3- butadiene are carcinogens. These and other VOCs contribute to the formation of ozone (O3) and aerosol particles, which have effects on human health and the radiative balance of the atmosphere. Although in the UK VOC emissions are subject to control under European Commission Directive 2008/50/EC and emission reducing technologies have been implemented, urban air pollution remains a concern. Urban air quality is likely to remain a priority since currently >50% of the global population live in urban areas with trends in urbanization and population migration predicted to increase. The ClearfLo project is a large multi-institutional consortium funded by the UK Natural Environment Research Council (NERC) and provides integrated measurements of meteorology, gas phase and particulate composition of the atmosphere over London. Both long term and IOP measurements were made at street and elevated locations at a range of sites across London and its surroundings during 2011 and 2012. Mixing ratios of a selection of nine VOCs were measured using a high sensitivity proton transfer reaction-mass spectrometer (PTR-MS) at a ground level urban background (North Kensington) and kerbside (Marylebone Road) site during the winter IOP. VOC fluxes were measured by virtually disjunct eddy covariance (vDEC) at an elevated urban site (King's College Strand) in Aug-Dec 2012. Our results for the first IOP showed that most of the selected compound concentrations depended on traffic emissions, although there was a marked difference between the urban background and kerbside sites. We identified some temperature effects on VOC concentrations. We also present the first analyses of VOC flux measurements over London. Preliminary analyses indicate most compounds associated with vehicle emissions closely

  10. Female condom launched in UK.

    Science.gov (United States)

    1992-01-01

    The lone-awaited female condom, Femidom, is to be launched at the end of September by manufacturers Chartex. It is being welcomed by the FPA [Family Planning Association] and other family planning experts as a valuable addition to the existing range of contraceptive methods and as an alternative to the male condom in offering effective protection against sexually transmitted diseases including HIV. A lubricated, loose-fitting polyurethane sheath, Femidom is inserted into the vagina at any time before sex. An inner ring holds the condom in place beyond the pubic bone and an outer ring lies flat against the vulva. In addition to extending choice, it is under direct control of the woman. As FPA Director Doreen Massey puts it: "We have to face the fact that some women who want safer sex can't get their partners to use condoms. for the 1st time with Femidom, you can insist that if he won't use a condom, you'll use yours." In trails of self-selected couples, up to 2/3 of women and their partners found the product acceptable. a study at the Institute of Population Studies in Exeter showed that while some couples had initial misgivings about the condom's size and appearance, especially its visibility when in position, these often declined with repeated use. Researcher Dr. Nicholas Ford pointed out that if the female condom makes a woman feel unattractive, her partner's comments may well influence these feelings. Users' experience of insertion and the condom's comfort also improved with repeated use. While there are no large studies showing ranges of effectiveness, it is likely to be as effective as the male condom (about 85%-98%). In a study of 106 women at the margaret Pyke Center in London, there were 7 unplanned pregnancies: 4 were due to inconsistent use of the method and 3 were method failures. Breakages were rare. 1/3 of participants dropped out in the 1st month. Users should continue with their existing contraceptive method until they are sure that they are using

  11. A tale of two cities: Comparison of impacts on CO2 emissions, the indoor environment and health of home energy efficiency strategies in London and Milton Keynes

    Science.gov (United States)

    Shrubsole, C.; Das, P.; Milner, J.; Hamilton, I. G.; Spadaro, J. V.; Oikonomou, E.; Davies, M.; Wilkinson, P.

    2015-11-01

    Dwellings are a substantial source of global CO2 emissions. The energy used in homes for heating, cooking and running electrical appliances is responsible for a quarter of current total UK emissions and is a key target of government policies for greenhouse gas abatement. Policymakers need to understand the potential impact that such decarbonization policies have on the indoor environment and health for a full assessment of costs and benefits. We investigated these impacts in two contrasting settings of the UK: London, a predominantly older city and Milton Keynes, a growing new town. We employed SCRIBE, a building physics-based health impact model of the UK housing stock linked to the English Housing Survey, to examine changes, 2010-2050, in end-use energy demand, CO2 emissions, winter indoor temperatures, airborne pollutant concentrations and associated health impacts. For each location we modelled the existing (2010) housing stock and three future scenarios with different levels of energy efficiency interventions combined with either a business-as-usual, or accelerated decarbonization of the electricity grid approach. The potential for CO2 savings was appreciably greater in London than Milton Keynes except when substantial decarbonization of the electricity grid was assumed, largely because of the lower level of current energy efficiency in London and differences in the type and form of the housing stock. The average net impact on health per thousand population was greater in magnitude under all scenarios in London compared to Milton Keynes and more beneficial when it was assumed that purpose-provided ventilation (PPV) would be part of energy efficiency interventions, but more detrimental when interventions were assumed not to include PPV. These findings illustrate the importance of considering ventilation measures for health protection and the potential variation in the impact of home energy efficiency strategies, suggesting the need for tailored policy

  12. BSE in the UK

    DEFF Research Database (Denmark)

    Jensen, Karsten Klint

    2004-01-01

    The 2000 BSE Inquiry report points out that the most serious failure of the UK Government was one of risk communication. This paper argues that the government's failure to communicate the risks BSE posed to humans to a large degree can be traced back to a lack of transparency in the first risk...

  13. Malnutrition in the UK.

    Science.gov (United States)

    Blades, Mabel

    2013-05-01

    Malnutrition is estimated to cost the UK twice that of obesity every year, but it is still an often overlooked problem. Dr Mabel Blades, a freelance Registered Dietician and Nutritionist, looks at the problems that malnutrition presents and the solutions that we can use to combat it.

  14. UK Mission to CERN

    CERN Multimedia

    2004-01-01

    At the end of June, nine experts from UK industry visited CERN to study techniques for developing distributed computing systems and to look at some specific applications. In a packed three-day programme, almost 40 CERN experts presented a comprehensive survey of achievements.

  15. Hewitt launches Research Councils UK

    CERN Multimedia

    2002-01-01

    "Trade and Industry Secretary Patricia Hewitt today launched 'Research Councils UK' - a new strategic partnership that will champion research in science, engineering and technology across the UK" (1 page).

  16. UK Royal Navy WWII Logbooks

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In 2006, the UK and NOAA's Climate Database Modernization Program (CDMP) funded the imaging of approximately 8,000 Royal Navy logbooks in the UK National Archives...

  17. Bottomley fuels fears London issues are too hot to handle.

    Science.gov (United States)

    1993-10-13

    Rumours that the government is shying away from tackling , the difficult issue of London's hospitals were fuelled by remarks made by Health Secretary Virginia Bottomley at a Conservative Party fringe meeting last week.

  18. Opinions from senior managers of London's luxury hotels

    African Journals Online (AJOL)

    jane.b

    consideration for hoteliers who are looking to open a luxury hotel within the city of London, ... the importance the spa plays to the hotel, its overall purpose of being in operation, .... market provide benefit by identifying different dynamics of.

  19. The Making of Two Readers: Agatha Christie and Jack London.

    Science.gov (United States)

    Baghban, Marcia

    1990-01-01

    Looks at the lives of two well-known writers to explore how diverse experiences produce literate adults. Discusses Agatha Christie and Jack London who used reading and writing to earn a living and to gain international reputations. (MG)

  20. The Growth Path and Future of London International Financial Center

    Institute of Scientific and Technical Information of China (English)

    李清娟

    2013-01-01

    London has grown up quickly to be a global financial center as a Phoenix in the past 100years,recorded history dating back to over 500 years ago.Though the financial services in London were berated to be "greedy"and as part of a giant casino led to the recession,this view was not accurate.London international financial center has become the core of the global financial industry,and played a crucial role in the development of the global economy.This article mainly discusses:the influence of London financial center on the world economy,the support to real economic development,the status of historical stages,and the development trend of the City.

  1. IEEE 1588 Clock Synchroniz ation in Distributed Systems%IEEE 1588时钟同步技术在分布式系统中的研究*

    Institute of Scientific and Technical Information of China (English)

    徐晓霞; 丁建功

    2014-01-01

    In order to realize high accuracy synchronous data acquisition and control in distributed system ,a distributed system clock synchronization method based on IEEE 1588 protocol is proposed .This paper analyzes the principle of master clock algorithm and the time synchronization process of local clock and master clock ,puts forward a IEEE 1588 realization scheme ,provides a hardware design method ,and elaborates the master‐slave clock software design process .On the basis of the work ,verifies the master‐slave clock synchronization .The experiments show that the method is feasible ,clock synchro‐nization precision can reach microsecond ,and may serve as a reference ,when the further application of IEEE 1588 in distrib‐uted industrial control systems is concerned .%为实现分布式系统高精度同步数据采集及实时控制,提出一种基于 IEEE 1588协议的分布式系统时钟同步方法。论文深入分析了IEEE 1588协议的算法原理和本地时钟同步主时钟的过程,提出了时间戳的IEEE 1588实现方案,提供了硬件设计方法,阐述了主从时钟的软件设计流程,在此基础上对主从时钟的同步进行了验证。实验证明:该方法是切实可行的,同步结果达到了10μs同步,为下一步将IEEE 1588大规模应用到分布式工业控制系统中起到了借鉴的作用。

  2. London house prices are power-law distributed

    CERN Document Server

    MacKay, Niall

    2010-01-01

    In this pilot study we explore the house price distributions for London, Manchester, Bristol, Newcastle, Birmingham and Leeds. We find Pareto (power law) behaviour in their upper tails, which is clearly distinct from lognormal behaviour in the cases of London and Manchester. We propose an index of Housing Wealth Inequality based on the Pareto exponent and analogous to the Gini coefficient, and comment on its possible uses.

  3. Eating fuet in London: From Autoethnography to Transnational Ethnography

    Directory of Open Access Journals (Sweden)

    Clara Rubio

    2017-08-01

    Full Text Available My own experience as a young Spanish migrant in London drove me to consider the importance that Spanish food has for emigrants and to consider its role within the community. This article presents food as a metaphor of the youth migration process to London during the economic crisis, and is based on three elements: how they construct their identity, their transition to adulthood and their condition as transmigrants.

  4. Mapping Arts, Health and Higher Education Collaborative Projects in London

    OpenAIRE

    Sheridan, Jill; Pring, Linda

    2007-01-01

    This publication is based on a report commissioned by The London Centre for Arts and Cultural Enterprise (LCACE) and Arts Council England (ACE) who are committed, along with other partners to building and analysing evidence of the impact of arts activity in the health arena. It seeks to map collaborative projects which have taken place in London since 2002 between the arts, health and higher education institutions. The remit for the research defines arts and health as arts-based activities th...

  5. Assessing public health risk in the London polonium-210 incident, 2006.

    Science.gov (United States)

    Maguire, H; Fraser, G; Croft, J; Bailey, M; Tattersall, P; Morrey, M; Turbitt, D; Ruggles, R; Bishop, L; Giraudon, I; Walsh, B; Evans, B; Morgan, O; Clark, M; Lightfoot, N; Gilmour, R; Gross, R; Cox, R; Troop, P

    2010-06-01

    Mr Alexander Litvinenko died in a London hospital on 23 November 2006, allegedly from poisoning with the radionuclide polonium-210 ((210)Po). Associated circumstances required an integrated response to investigate the potential risk of internal contamination for individuals exposed to contaminated environments. Descriptive study. Contaminated locations presenting a potential risk to health were identified through environmental assessment by radiation protection specialists. Individuals connected with these locations were identified and assessed for internal contamination with (210)Po. In total, 1029 UK residents were identified, associated with the 11 most contaminated locations. Of these, 974 were personally interviewed and 787 were offered urine tests for (210)Po excretion. Overall, 139 individuals (18%) showed evidence of probable internal contamination with (210)Po arising from the incident, but only 53 (7%) had assessed radiation doses of 1mSv or more. The highest assessed radiation dose was approximately 100mSv. Although internal contamination with (210)Po was relatively frequent and was most extensive among individuals associated with locations judged a priori to pose the greatest risk, a high degree of assurance could be given to UK and international communities that the level of health risk from exposure to the radionuclide in this incident was low. Copyright 2010 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.

  6. Spectator Consumer Behaviors at the 2012 London Paralympic Games

    Directory of Open Access Journals (Sweden)

    Ridvan Ekmekci

    2013-01-01

    Full Text Available Although the Paralympics are the world’s second largest sporting event after the Olympics and continue to grow in popularity, there is little available research regarding spectators of sport competitions for disabled athletes. The purpose of this study was to profile spectators’ consumer behaviors in order to understand what factors explain spectators’ spending, length of stay, and attendance at the London Paralympic Games. Data was collected in a six-day period from a sample of 504 people present in London at three Paralympic sport facilities during the 2012 Paralympic Games. The results of the regression analyses revealed that nationality, attended contests, group size, having a connection with a Paralympic athlete, length of stay, gender and London Olympics’ spectators were significant determinants of Paralympics spectators’ spending in London. The data also indicated that spending, being from England (or not, gender, and being a friend/relative of a Paralympic athlete significantly affected spectators’ length of stay in London. Additionally, spectators’ attendance at the London Paralympic contests was predicted by spending, the size of the travel group, Beijing Paralympics’ spectators and age.

  7. 48 CFR 52.223-16 - IEEE 1680 Standard for the Environmental Assessment of Personal Computer Products.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false IEEE 1680 Standard for the... CONTRACT CLAUSES Text of Provisions and Clauses 52.223-16 IEEE 1680 Standard for the Environmental Assessment of Personal Computer Products. As prescribed in 23.706(b)(1), insert the following clause: IEEE...

  8. The Well London program - a cluster randomized trial of community engagement for improving health behaviors and mental wellbeing: baseline survey results

    Directory of Open Access Journals (Sweden)

    Phillips Gemma

    2012-07-01

    Full Text Available Abstract Background The Well London program used community engagement, complemented by changes to the physical and social neighborhood environment, to improve physical activity levels, healthy eating, and mental wellbeing in the most deprived communities in London. The effectiveness of Well London is being evaluated in a pair-matched cluster randomized trial (CRT. The baseline survey data are reported here. Methods The CRT involved 20 matched pairs of intervention and control communities (defined as UK census lower super output areas (LSOAs; ranked in the 11% most deprived LSOAs in London by the English Indices of Multiple Deprivation across 20 London boroughs. The primary trial outcomes, sociodemographic information, and environmental neighbourhood characteristics were assessed in three quantitative components within the Well London CRT at baseline: a cross-sectional, interviewer-administered adult household survey; a self-completed, school-based adolescent questionnaire; a fieldworker completed neighborhood environmental audit. Baseline data collection occurred in 2008. Physical activity, healthy eating, and mental wellbeing were assessed using standardized, validated questionnaire tools. Multiple imputation was used to account for missing data in the outcomes and other variables in the adult and adolescent surveys. Results There were 4,107 adults and 1,214 adolescent respondents in the baseline surveys. The intervention and control areas were broadly comparable with respect to the primary outcomes and key sociodemographic characteristics. The environmental characteristics of the intervention and control neighborhoods were broadly similar. There was greater between-cluster variation in the primary outcomes in the adult population compared to the adolescent population. Levels of healthy eating, smoking, and self-reported anxiety/depression were similar in the Well London adult population and the national Health Survey for England. Levels of

  9. IEEE 802.11ah: A Technology to Face the IoT Challenge

    Directory of Open Access Journals (Sweden)

    Victor Baños-Gonzalez

    2016-11-01

    Full Text Available Since the conception of the Internet of things (IoT, a large number of promising applications and technologies have been developed, which will change different aspects in our daily life. This paper explores the key characteristics of the forthcoming IEEE 802.11ah specification. This future IEEE 802.11 standard aims to amend the IEEE 802.11 legacy specification to support IoT requirements. We present a thorough evaluation of the foregoing amendment in comparison to the most notable IEEE 802.11 standards. In addition, we expose the capabilities of future IEEE 802.11ah in supporting different IoT applications. Also, we provide a brief overview of the technology contenders that are competing to cover the IoT communications framework. Numerical results are presented showing how the future IEEE 802.11ah specification offers the features required by IoT communications, thus putting forward IEEE 802.11ah as a technology to cater the needs of the Internet of Things paradigm.

  10. IEEE 802.11ah: A Technology to Face the IoT Challenge.

    Science.gov (United States)

    Baños-Gonzalez, Victor; Afaqui, M Shahwaiz; Lopez-Aguilera, Elena; Garcia-Villegas, Eduard

    2016-11-22

    Since the conception of the Internet of things (IoT), a large number of promising applications and technologies have been developed, which will change different aspects in our daily life. This paper explores the key characteristics of the forthcoming IEEE 802.11ah specification. This future IEEE 802.11 standard aims to amend the IEEE 802.11 legacy specification to support IoT requirements. We present a thorough evaluation of the foregoing amendment in comparison to the most notable IEEE 802.11 standards. In addition, we expose the capabilities of future IEEE 802.11ah in supporting different IoT applications. Also, we provide a brief overview of the technology contenders that are competing to cover the IoT communications framework. Numerical results are presented showing how the future IEEE 802.11ah specification offers the features required by IoT communications, thus putting forward IEEE 802.11ah as a technology to cater the needs of the Internet of Things paradigm.

  11. Combined Ground and Space-Based Measurements of Air Quality during the London Olympic Games 2012

    Science.gov (United States)

    Graves, R. R.; Leigh, R. J.; Singh Anand, J.; McNally, M.; Lawrence, J.; Remedios, J.; Monks, P. S.

    2012-12-01

    During July and August 2012 the Summer Olympic Games were held in London. During this period, unusually high levels of traffic and visitors to the city were expected, it is important to understand the effect this had on the air quality in London during this period. To this end three novel CityScan instruments were installed in London from the 20th July though to the end of September; affording the unique opportunity to monitor the spatial and vertical structure of nitrogen dioxide within the boundary layer in unprecedented detail. The deployment was included as part of the large NERC funded ClearfLo project (Clean Air for London) involving many other institutions and complementary measurement techniques. CityScan is a Hemispherical Scanning Imaging Differential Optical Absorption Spectrometer (HSI-DOAS) which is has been optimised to measure concentrations of nitrogen dioxide. CityScan has a 95° field of view (FOV) between the zenith and 5° below the horizon. Across this FOV there are 128 resolved elements which are measured concurrently, the spectrometer is rotated azimuthally 1° per second providing full hemispherical coverage every 6 minutes. CityScan measures concentrations of nitrogen dioxide over specific lines of sight and due to the extensive field of view of the instrument this produces measurements which are representative over city-wide scales. Nitrogen dioxide is an important air pollutant which is produced in all combustion processes and can reduce lung function; especially in sensitised individuals. These instruments aim to bridge the gap in spatial scales between point source measurements of air quality and satellite measurements of air quality offering additional information on emissions, transport and the chemistry of nitrogen dioxide. More information regarding the CityScan technique can be found at http://www.leos.le.ac.uk/aq/index.html. The first of the three CityScan instruments was located in North Kensington, the second in Soho and third

  12. An Asynchronous IEEE Floating-Point Arithmetic Unit

    Directory of Open Access Journals (Sweden)

    Joel R. Noche

    2007-12-01

    Full Text Available An asynchronous floating-point arithmetic unit is designed and tested at the transistor level usingCadence software. It uses CMOS (complementary metal oxide semiconductor and DCVS (differentialcascode voltage switch logic in a 0.35 µm process using a 3.3 V supply voltage, with dual-rail data andsingle-rail control signals using four-phase handshaking.Using 17,085 transistors, the unit handles single-precision (32-bit addition/subtraction, multiplication,division, and remainder using the IEEE 754-1985 Standard for Binary Floating-Point Arithmetic, withrounding and other operations to be handled by separate hardware or software. Division and remainderare done using a restoring subtractive algorithm; multiplication uses an additive algorithm. Exceptionsare noted by flags (and not trap handlers and the output is in single-precision.Previous work on asynchronous floating-point arithmetic units have mostly focused on single operationssuch as division. This is the first work to the authors' knowledge that can perform floating-point addition,multiplication, division, and remainder using a common datapath.

  13. Throughput Analysis of IEEE 802.11 Multirate WLANs with Collision Aware Rate Adaptation Algorithm

    Institute of Scientific and Technical Information of China (English)

    Dhanasekaran Senthilkumar; A. Krishnan

    2010-01-01

    This paper presents a mathematical model that analyzes the throughput of the IEEE 802.11b distributed coordination function (DCF) with the collision aware rate adaptation (CARA) algorithm. IEEE 802.11 WLANs provide multiple transmission rates to improve system throughput by adapting the transmission rate to the current channel conditions. The system throughput is determined by some stations using low transmission rates due to bad channel conditions. CARA algorithm does not disturb the existing IEEE 802.1 lb formats and it can be easily incorporated into the commercial wireless local area networks (WLAN) devices. Finally, we verify our findings with simulation.

  14. Fuzzy logic congestion control in IEEE 802.11 wireless local area networks: A performance evaluation

    CSIR Research Space (South Africa)

    Nyirenda, CN

    2007-09-01

    Full Text Available networks because they are Clement .N. Nyirenda is with the Meraka Institute, Centre for Scientific and Industrial Research, Pretoria, South Africa (+27 72 1404564; e-mail: nyirendac@ ieee.org). Dawoud S. Dawoud is with the Radio Access Technologies... heavily depends on the frame payload size. When only frames are sent, the maximum throughput on the wireless channel on the wireless channel can drop below 1Mbps even at a data rate of 11 Mbps. At present, an IEEE working group (IEEE802.11n...

  15. Energy Harvesting - Wireless Sensor Networks for Indoors Applications Using IEEE 802.11

    DEFF Research Database (Denmark)

    Fafoutis, Xenofon; Sørensen, Thomas; Madsen, Jan

    2014-01-01

    The paper investigates the feasibility of using IEEE 802.11 in energy harvesting low-power sensing applications. The investigation is based on a prototype carbon dioxide sensor node that is powered by artificial indoors light. The wireless communication module of the sensor node is based on the RTX......4100 module. RTX4100 incorporates a wireless protocol that duty-cycles the radio while being compatible with IEEE 802.11 access points. The presented experiments demonstrate sustainable operation but indicate a trade-off between the benefits of using IEEE 802.11 in energy harvesting applications...

  16. Performance Analysis of IEEE 802.11e (EDCF) and IEEE 802.11(DCF) WLAN Incorporating Different Physical Layer Standards

    Science.gov (United States)

    Sharma, V.; Singh, H.; Malhotra, J.

    2012-12-01

    Medium access coordination function basically implements the distributed coordination function (DCF) which provides support to best effort services but limited to QoS services. Subsequently, a new standard, namely enhanced distributed channel access (EDCA) is reported. The IEEE 802.11e (EDCA) defines MAC procedures to support QoS requirements which specifies distributed contention based access scheme to access the shared wireless media. This paper evaluates the performance of EDCA based IEEE 802.11 WLAN for various access categories (ACs) using OPNET™ Modeller 14.5. Further, the computed results are compared with DCF protocols in terms of QoS parameters. Furthermore, the simulative observation is reported at data rate of 54 Mbps using different physical layer protocols such as IEEE 802.11a/b/g to stumble on the best one to be implemented with EDCF to achieve improved QoS.

  17. 基于OFDM的IEEE802.16a物理层简介%Introduction of IEEE802.16a Physical Layer Based on OFDM

    Institute of Scientific and Technical Information of China (English)

    许云东; 潘志文

    2006-01-01

    简要介绍了IEEE802.16的基本概况,描述了IEEE802.16a标准采用的几种物理层方案.IEEE802.16a协议物理层支持的主流技术就是OFDM技术,重点介绍了OFDM的基本原理,采用OFDM调制技术的WirelessMAN-OFDM系统,以及其物理层的一些参数及性能.最后介绍了2种双工方式的帧结构及其工作原理.

  18. Life satisfaction and air quality in London

    Energy Technology Data Exchange (ETDEWEB)

    MacKerron, George; Mourato, Susana [Department of Geography and Environment, and Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science, Houghton Street, London WC2A 2AE (United Kingdom)

    2009-03-15

    A growing body of research in economics concerns self-reported happiness, or life satisfaction (LS), and its relationship to a wide range of other variables. The findings of this research tend to highlight the importance of non-income aspects of individuals' life conditions. These findings are strongly complementary to themes within the sustainable development discourse. Firstly, they suggest ways in which we might consume less without compromising on our current levels of LS. And secondly, they help demonstrate the immediate LS benefits that could be gained from higher levels of environmental quality (EQ). However, the empirical evidence for the link between EQ and LS is, to date, somewhat weak, due in part to a lack of EQ data at a level of detail to match the individual-by-individual resolution of LS measures. This small, exploratory study therefore seeks to assess how the use of EQ data at very high spatial resolution could advance the empirical literature examining connections between LS and EQ levels, focusing on air quality in particular. It collects original survey data for approximately 400 Londoners, and uses geographical information system (GIS) software to calculate pollutant concentrations in the immediate vicinity of their homes. It uses this data to estimate maximum likelihood regression models explaining LS ratings in terms of a range of individual, household and local variables. Both perceived and measured air pollution levels are significantly negatively associated with the LS of the survey respondents, even when controlling for a wide range of other effects. An increase of 10 {mu}g/m{sup 3} in annual mean nitrogen dioxide concentration appears to correspond on average to a drop of nearly half a point of LS on an 11-point rating scale. These findings cannot yet be generalised with confidence. However, if they were confirmed by larger future studies, they would appear to strengthen and extend existing arguments in favour of policies to reduce

  19. Analysis of Adaptive Control Scheme in IEEE 802.11 and IEEE 802.11e Wireless LANs

    Science.gov (United States)

    Lee, Bih-Hwang; Lai, Hui-Cheng

    In order to achieve the prioritized quality of service (QoS) guarantee, the IEEE 802.11e EDCAF (the enhanced distributed channel access function) provides the distinguished services by configuring the different QoS parameters to different access categories (ACs). An admission control scheme is needed to maximize the utilization of wireless channel. Most of papers study throughput improvement by solving the complicated multidimensional Markov-chain model. In this paper, we introduce a back-off model to study the transmission probability of the different arbitration interframe space number (AIFSN) and the minimum contention window size (CWmin). We propose an adaptive control scheme (ACS) to dynamically update AIFSN and CWmin based on the periodical monitoring of current channel status and QoS requirements to achieve the specific service differentiation at access points (AP). This paper provides an effective tuning mechanism for improving QoS in WLAN. Analytical and simulation results show that the proposed scheme outperforms the basic EDCAF in terms of throughput and service differentiation especially at high collision rate.

  20. Provision of health promotion programmes to people with serious mental illness: a mapping exercise of four South London boroughs.

    Science.gov (United States)

    O'Brien, C; Gardner-Sood, P; Corlett, S K; Ismail, K; Smith, S; Atakan, Z; Greenwood, K; Joseph, C; Gaughran, F

    2014-03-01

    People with serious mental illness (SMI) are at increased risk of developing various physical health diseases, contributing to significantly reduced life expectancies compared with the general population. In light of this, the Department of Health have set the physical health of people with mental health problems as a priority for improvement. Additionally, the UK government encourages the NHS and local authorities to develop health promotion programmes (HPPs) for people with SMI. To document how many and what types of HPPs were available to people with SMI across four South London boroughs, UK. We found 145 HPPs were available to people with SMI across the four boroughs, but with an inequitable distribution. We also found that certain HPPs set admission criteria that were likely to act as a barrier to improving health. A more integrated approach of documenting and providing information regarding the provision of HPPs for or inclusive of people with SMI is needed. People with serious mental illness (SMI) such as schizophrenia, schizoaffective disorders and bipolar disorder are at increased risk of developing diabetes, cardiovascular disease and respiratory disease, contributing to significantly reduced life expectancies. As a result, emphasis has been placed on developing Health Promotion Programmes (HPPs) to modify the risk of poor physical health in SMI. We examined how many and what types of HPPs are available for or inclusive of people with SMI across four borough in South London, UK. A cross-sectional mapping study was carried out to identify the number of HPPs available to people with SMI. We found 145 HPPs available to people with SMI existed across the four boroughs but with an inequitable distribution, which in some boroughs we anticipate may not meet need. In some cases, HPPs set admission conditions which were likely to further impede access. We recommend that accurate and readily available information on the provision of HPPs for or inclusive of people

  1. Langattoman lähiverkon päivitys IEEE 802.11g -laitteista IEEE 802.11n -laitteisiin

    OpenAIRE

    Kokkonen, Janne

    2009-01-01

    Insinöörityössä tutkittiin langattoman lähiverkon vaiheittaista päivittämistä IEEE 802.11g -standardin laitteista IEEE 802.11n -standardin laitteisiin. Tavoitteena oli tutkia teorian ja käytännön mittauksien pohjalta paras mahdollinen vaihtoehto verkon päivityksen toteuttamiseksi. Työhön liittyvät mittaukset suoritettiin Metropolia Ammattikorkeakoulun tiloissa ja laitteilla. Työn alussa selvitettiin langattomiin lähiverkkoihin liittyviä teoreettisia yksityiskohtia, joiden perusteella rake...

  2. Langattoman lähiverkon päivitys IEEE 802.11g -laitteista IEEE 802.11n -laitteisiin

    OpenAIRE

    Kokkonen, Janne

    2009-01-01

    Insinöörityössä tutkittiin langattoman lähiverkon vaiheittaista päivittämistä IEEE 802.11g -standardin laitteista IEEE 802.11n -standardin laitteisiin. Tavoitteena oli tutkia teorian ja käytännön mittauksien pohjalta paras mahdollinen vaihtoehto verkon päivityksen toteuttamiseksi. Työhön liittyvät mittaukset suoritettiin Metropolia Ammattikorkeakoulun tiloissa ja laitteilla. Työn alussa selvitettiin langattomiin lähiverkkoihin liittyviä teoreettisia yksityiskohtia, joiden perusteella rake...

  3. 高速接口USB与IEEE1394的性能分析%Performance Analysis of High-Speed Digital Interface USB and IEEE 1394

    Institute of Scientific and Technical Information of China (English)

    李洋; 邹建华

    2001-01-01

    The basic features of Universal Serial BusUSB and IEEE 1394 are analyzed and compared in this paper and the foreground of the two interfaces are described.%对计算机外设高速接口USB和IEEE 1394的技术特点和数据传输机制进行了较详细的分析,比较了两种接口的性能,并对其应用前景进行了展望。

  4. Corrections to "Connectivity-Based Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs"

    Directory of Open Access Journals (Sweden)

    Choi Woo-Yong

    2010-01-01

    Full Text Available We have found the errors in the throughput formulae presented in our paper "Connectivity-based reliable multicast MAC protocol for IEEE 802.11 wireless LANs". We provide the corrected formulae and numerical results.

  5. Throughput Analysis Model for IEEE 802.11e EDCA with Multiple Access Categories

    Directory of Open Access Journals (Sweden)

    Y. Lee

    2013-08-01

    Full Text Available IEEE 802.11e standard has been specified to support differentiated quality of service (QoS, one of the critical issues on the conventional IEEE 802.11 wireless local area networks (WLANs. Enhanced Distributed Channel Access (EDCA is the fundamental and mandatory contention-based channel access method of IEEE 802.11e, and delivers traffic based on differentiated Access Categories (ACs. A general three dimensional Markov chain model of IEEE 802.11e EDCA for performance analysis is proposed in this paper. The analytical model considers multiple stations with an arbitrary number of different ACs. It also differentiates the contention window (CW sizes and the arbitration interframe spaces (AIFSs, and considers virtual collision mechanism. Based on the model, the saturation throughput of EDCA is derived, and the accuracy of the proposed model is validated via simulations.

  6. Developing IEEE medical device standards: a case study, wearable cuffless blood pressure measuring devices.

    Science.gov (United States)

    Carey, Carole C; Zhang, Yuang-Ting

    2010-01-01

    The Institute of Electrical and Electronics Engineers Standards Association (IEEE-SA) is a leading standards developing organization of global industry standards in a wide-range of industries, including biomedical and healthcare.

  7. Graduates of different UK medical schools show substantial differences in performance on MRCP(UK Part 1, Part 2 and PACES examinations

    Directory of Open Access Journals (Sweden)

    Mollon Jennifer

    2008-02-01

    Full Text Available Abstract Background The UK General Medical Council has emphasized the lack of evidence on whether graduates from different UK medical schools perform differently in their clinical careers. Here we assess the performance of UK graduates who have taken MRCP(UK Part 1 and Part 2, which are multiple-choice assessments, and PACES, an assessment using real and simulated patients of clinical examination skills and communication skills, and we explore the reasons for the differences between medical schools. Method We perform a retrospective analysis of the performance of 5827 doctors graduating in UK medical schools taking the Part 1, Part 2 or PACES for the first time between 2003/2 and 2005/3, and 22453 candidates taking Part 1 from 1989/1 to 2005/3. Results Graduates of UK medical schools performed differently in the MRCP(UK examination between 2003/2 and 2005/3. Part 1 and 2 performance of Oxford, Cambridge and Newcastle-upon-Tyne graduates was significantly better than average, and the performance of Liverpool, Dundee, Belfast and Aberdeen graduates was significantly worse than average. In the PACES (clinical examination, Oxford graduates performed significantly above average, and Dundee, Liverpool and London graduates significantly below average. About 60% of medical school variance was explained by differences in pre-admission qualifications, although the remaining variance was still significant, with graduates from Leicester, Oxford, Birmingham, Newcastle-upon-Tyne and London overperforming at Part 1, and graduates from Southampton, Dundee, Aberdeen, Liverpool and Belfast underperforming relative to pre-admission qualifications. The ranking of schools at Part 1 in 2003/2 to 2005/3 correlated 0.723, 0.654, 0.618 and 0.493 with performance in 1999–2001, 1996–1998, 1993–1995 and 1989–1992, respectively. Conclusion Candidates from different UK medical schools perform differently in all three parts of the MRCP(UK examination, with the

  8. Access Point Selection for Multi-Rate IEEE 802.11 Wireless LANs

    Science.gov (United States)

    2014-05-16

    Feb 2010. [ 11 ] Y. Bejerano, S. jae Han, and L. Li, “Fairness and Load Balancing in Wireless LANs Using Association Control,” Networking, IEEE /ACM...Steenkiste, “Fixing 802 . 11 access point selection,” ACM SIGCOMM Computer Communication Review, 2002. [15] J. C. Chen, T. C. Chen, T. Zhang, and E. van...Access Point Selection for Multi-Rate IEEE 802.11 Wireless LANs Shicong Yang Avideh Zakhor Electrical Engineering and Computer Sciences University of

  9. Algorithm XXX : functions to support the IEEE standard for binary floating-point arithmetic.

    Energy Technology Data Exchange (ETDEWEB)

    Cody, W. J.; Mathematics and Computer Science

    1993-12-01

    This paper describes C programs for the support functions copysign(x,y), logb(x), scalb(x,n), nextafter(x,y), finite(x), and isnan(x) recommended in the Appendix to the IEEE Standard for Binary Floating-Point Arithmetic. In the case of logb, the modified definition given in the later IEEE Standard for Radix-Independent Floating-Point Arithmetic is followed. These programs should run without modification on most systems conforming to the binary standard.

  10. The Unum Number Format: Mathematical Foundations, Implementation and Comparison to IEEE 754 Floating-Point Numbers

    OpenAIRE

    Hunhold, Laslo

    2017-01-01

    This thesis examines a modern concept for machine numbers based on interval arithmetic called 'Unums' and compares it to IEEE 754 floating-point arithmetic, evaluating possible uses of this format where floating-point numbers are inadequate. In the course of this examination, this thesis builds theoretical foundations for IEEE 754 floating-point numbers, interval arithmetic based on the projectively extended real numbers and Unums.

  11. Improving Security Levels Of IEEE802.16e Authentication By Diffie-Hellman Method

    Directory of Open Access Journals (Sweden)

    Mohammad Zabihi

    2011-11-01

    Full Text Available In this paper, we proposed an authentication method according to Diffie-Hellman. First, we introduce different methods for authentication in IEEE.802.16 then we proposed an authentication method according to Diffie-Hellman and in the last we compare different methods for authentication to improve security in IEEE802.16e. CPN is a useful for simulation and compare protocol together so we use CPN tools in this paper.

  12. A Unified Computational Framework for Real-Time Optimal Control , IEEE (42nd; 2003; Maui, Hawaii)

    OpenAIRE

    Ross, I. Michael; Fahroo, Fariba

    2003-01-01

    The article of record as published may be located at http://ieeexplore.ieee.org Approved for public display, distribution unlimited Proceedings of the 42nd IEEE ; Conference on Decision and Control ; Maui, Hawaii USA, December 2003 The dynamics of each agent of a multi-agent controlled dynamical system can be formulated in several possible ways: differential inclusion, flatness parameterization, higher-order inclusions and so on. A plethora of techniques have been proposed for each o...

  13. IEEE 802.16协议及其应用

    Institute of Scientific and Technical Information of China (English)

    张云飞

    2009-01-01

    IEEE 802.16协议由于具有广阔的应用前景,目前受到了国内外学术界和产业界的广泛关注.本文首先介绍了IEEE 802.16协议系列的现状及其进展,然后叙述了其应用情况.

  14. Enhancing MAC performance of DCF protocol for IEEE 802.11 wireless LANs

    Science.gov (United States)

    Choi, Woo-Yong

    2017-01-01

    The DCF (Distributed Coordination Function) is the basic MAC (Medium Access Control) protocol of IEEE 802.11 wireless LANs and compatible with various IEEE 802.11 PHY extensions. The performance of the DCF degrades exponentially as the number of nodes participating in the DCF transmission procedure increases. To deal with this problem, we propose a simple, however efficient modification of the DCF by which the performance of the DCF is greatly enhanced.

  15. Exploring anterograde associative memory in London taxi drivers.

    Science.gov (United States)

    Woollett, Katherine; Maguire, Eleanor A

    2012-10-24

    London taxi drivers are renowned for their navigation ability, spending a number of years acquiring 'The Knowledge' of London's complex layout and having to pass stringent examinations to obtain an operating licence. In several studies, this navigation skill has been associated with increased posterior but also decreased anterior hippocampal grey matter volume. Neuropsychologically, gain and loss has also been documented in taxi drivers; while very skilled at navigation in London, they are significantly poorer than controls at learning and recalling new object-location associations. Here we tested a group of London taxi drivers and matched control participants on this object-location associations task, while also subjecting them to a battery of challenging anterograde associative memory tests involving verbal, visual and auditory material both within and across modalities. Our aim was to assess whether their difficulty in previous studies reflected a general problem with associative memory, or was restricted to the spatial domain. We replicated previous findings of poor learning and memory of object-location associations. By contrast, their performance on the other anterograde associative memory tasks was comparable with controls. This resolves an outstanding question in the memory profile of London taxi drivers following hippocampal plasticity, and underlines the close relationship between space and the hippocampus.

  16. Method of Testing High Speed Digital Network Based on IEEE 1149. 6 Standard%基于IEEE 1149.6标准的高速数字网络测试方法

    Institute of Scientific and Technical Information of China (English)

    尤路

    2015-01-01

    As requirement of high speed signal testing increases gradually, the application prospect of the IEEE 1149. 6 standard becomes more and more extensively. Starting from generation of IEEE 1149. 6 standard, the difference between the IEEE 1149. 1 and IEEE 1149. 6 standards is introduced. The fault type of the IEEE 1149. 6 standard is introduced in detail by way of test verification example. This method is functioned obviously in testing high speed digital circuit channel.%随着高速信号测试需求的逐渐增加,IEEE 1149.6标准的应用前景越来越广,本文从IEEE 1149.6标准的产生入手,主要介绍了IEEE 1149.6标准与IEEE 1149.1标准的区别,后文中通过测试验证实例,详细介绍了IEEE 1149.6标准中的故障类型,该方法目前已在数字电路高速通道测试中凸显作用。

  17. Virtual Visit to the ATLAS Control Room by London Academy

    CERN Multimedia

    2013-01-01

    London Academy is a multicultural academy in Edgware, outer London. Within an extremely caring and supportive environment, students, including those in the sixth form, many pupils, flourish and achieve well. The Principal`s clear vision of a learning community that develops in its students the skills and values that will enable them to live their lives as respectful, caring and responsible citizens is both shared and realised. The event was organised from London Academy by the Physics Teacher, Ms Pamela Chabba; the older science students, especially those who are studying pure physics, are very excited about the event linking them to CERN. They range between 14-18 years old and many plan to go on to study sciences at university.

  18. Lidar Observations of Pollution Transport From London to Rural Areas

    Directory of Open Access Journals (Sweden)

    Ricketts Hugo

    2016-01-01

    Full Text Available The Clean Air for London (ClearfLo Project took place in and around London, United Kingdom. The aim of the project was to learn how both atmospheric dynamics and chemistry affect air pollution in the south east of England. During the winter and summer of 2012 many different types of instrument including lidars were deployed throughout London city centre, suburbs and into rural areas. Amongst these instruments was the Boundary Layer Aerosol/Ozone Lidar owned by the National Centre for Atmospheric Sciences (NCAS in the United Kingdom. Ozone and aerosol data are presented from data collected during July and August 2012 and compared to back trajectories to identify their origins.

  19. Learning as Social Exchange in City Year London

    DEFF Research Database (Denmark)

    Revsbech, Christine

    Learning as Social Exchange in City Year London: Action towards an image of greatness contributes to the growing field of research on social entrepreneurship. The thesis is the result of an interesting, anthropological study of a social voluntary organisation, City Year London, a British affiliate...... of an American charity. Young volunteers were followed in their daily activities working as mentors for public primary school children, and the interaction between staff and volunteers in City Year London were observed. Also, interviews with both volunteers and staff were carried out. The thesis explores...... the empirical findings applying an understanding of learning as social exchange of value. The rich empirical data has led to analyses that draw on and contribute to economic anthropology, learning theories and social entrepreneurship....

  20. Multifractal to monofractal evolution of the London's street network

    CERN Document Server

    Murcio, Roberto; Arcaute, Elsa; Batty, Michael

    2015-01-01

    We perform a multifractal analysis of the evolution of London's street network from 1786 to 2010. First, we show that a single fractal dimension, commonly associated with the morphological description of cities, does not su ce to capture the dynamics of the system. Instead, for a proper characterization of such a dynamics, the multifractal spectrum needs to be considered. Our analysis reveals that London evolves from an inhomogeneous fractal structure, that can be described in terms of a multifractal, to a homogeneous one, that converges to monofractality. We argue that London's multifractal to monofracal evolution might be a special outcome of the constraint imposed on its growth by a green belt. Through a series of simulations, we show that multifractal objects, constructed through di usion limited aggregation, evolve towards monofractality if their growth is constrained by a non-permeable boundary.

  1. The future of the London Buy-To-Let property market: Simulation with temporal Bayesian Networks

    Science.gov (United States)

    Fenton, Norman

    2017-01-01

    In 2015 the British government announced a number of major tax reforms for individual landlords. To give landlords time to adjust, some of these tax measures are being introduced gradually from April 2017, with full effect in tax year 2020/21. The changes in taxation have received much media attention since there has been widespread belief that the new measures were sufficiently skewed against landlords that they could signal the end of the Buy-To-Let (BTL) investment era in the UK. This paper assesses the prospective performance of BTL investments in London from the investor’s perspective, and examines the impact of incoming tax reforms using a novel Temporal Bayesian Network model. The model captures uncertainties of interest by simulating the impact of changing circumstances and the interventions available to an investor at various time-steps of a BTL investment portfolio. The simulation results suggest that the new tax reforms are likely to have a detrimental effect on net profits from rental income, and this hits risk-seeking investors who favour leverage much harder than risk-averse investors who do not seek to expand their property portfolio. The impact on net profits also poses substantial risks for lossmaking returns excluding capital gains, especially in the case of rising interest rates. While this makes it less desirable or even non-viable for some to continue being a landlord, based on the current status of all factors taken into consideration for simulation, investment prospects are still likely to remain good within a reasonable range of interest rate and capital growth rate variations. The results also suggest that the recent trend of property prices in London increasing faster than rents will not continue for much longer; either capital growth rates will have to decrease, rental growth rates will have to increase, or we shall observe a combination of the two events. PMID:28654698

  2. The future of the London Buy-To-Let property market: Simulation with temporal Bayesian Networks.

    Science.gov (United States)

    Constantinou, Anthony C; Fenton, Norman

    2017-01-01

    In 2015 the British government announced a number of major tax reforms for individual landlords. To give landlords time to adjust, some of these tax measures are being introduced gradually from April 2017, with full effect in tax year 2020/21. The changes in taxation have received much media attention since there has been widespread belief that the new measures were sufficiently skewed against landlords that they could signal the end of the Buy-To-Let (BTL) investment era in the UK. This paper assesses the prospective performance of BTL investments in London from the investor's perspective, and examines the impact of incoming tax reforms using a novel Temporal Bayesian Network model. The model captures uncertainties of interest by simulating the impact of changing circumstances and the interventions available to an investor at various time-steps of a BTL investment portfolio. The simulation results suggest that the new tax reforms are likely to have a detrimental effect on net profits from rental income, and this hits risk-seeking investors who favour leverage much harder than risk-averse investors who do not seek to expand their property portfolio. The impact on net profits also poses substantial risks for lossmaking returns excluding capital gains, especially in the case of rising interest rates. While this makes it less desirable or even non-viable for some to continue being a landlord, based on the current status of all factors taken into consideration for simulation, investment prospects are still likely to remain good within a reasonable range of interest rate and capital growth rate variations. The results also suggest that the recent trend of property prices in London increasing faster than rents will not continue for much longer; either capital growth rates will have to decrease, rental growth rates will have to increase, or we shall observe a combination of the two events.

  3. Epidemiology of internal contamination with polonium-210 in the London incident, 2006.

    Science.gov (United States)

    Fraser, G; Giraudon, I; Cohuet, S; Bishop, L; Maguire, H; Thomas, H L; Mandal, S; Anders, K; Sanchez-Padilla, E; Charlett, A; Evans, B; Gross, R

    2012-02-01

    More than 700 UK residents were tested for possible contamination with polonium-210 ((210)Po) following the alleged poisoning of Mr Alexander Litvinenko in London in November 2006. This paper describes the epidemiology of internal contamination with the radionuclide in this group. 11 locations in London had been identified as sufficiently environmentally contaminated with (210)Po to present a health risk to people associated with them. Public health consultant teams identified individuals at risk and offered 24-h urine testing for (210)Po excretion. Prevalence of internal contamination was estimated, and a retrospective cohort analysis was completed for each location. Overall 139 individuals (prevalence 0.19 (95% CI 0.13 to 0.27)) showed evidence of internal contamination with (210)Po, although none with uptakes likely to cause adverse health effects. Substantial prevalence was seen among specific hotel service staff, customers, staff and other users of a hotel bar, office and hospital staff, staff of one restaurant and residents of and visitors to the family home. Increased risks of contamination were seen for a hotel bar in association with occupational, behavioural and temporal factors. Occupational and guest exposure to contaminated areas of hotels were also associated with increased contamination risk. Nurses were more likely to become contaminated than other staff involved in direct patient care. Uptake of trace amounts of radionuclide in this incident was frequent. Occupational, behavioural and temporal gradients in contamination risk were mostly consistent with a priori site risk assessments. Utility of the investigation methods and findings for future accidental or deliberate environmental contamination incidents are discussed.

  4. UK maritime developments

    Energy Technology Data Exchange (ETDEWEB)

    Cappuccaio, M.

    2005-05-01

    Global maritime trade continues to expand in 2003. UNCTAD estimated over 6 Bn/t (billion tonnes) of dry bulk raw materials, oil, oil products and manufactured good were shipped by sea in 2003, recording a 3.7% annual growth rate with similarly healthy growth projected for 2004 and 2005. The expansion is mainly attributable to the economic performance of the US, Japan and China and, to a lesser extent, Europe. The article gives the latest news on developments at UK ports and contains statistics on port traffic and cargo. A table gives figures for coal handled by major ports from 2001 to 2003. 7 tabs., 2 photos.

  5. Developing Integrated Care Teams Across the North West London System

    OpenAIRE

    O'Halloran, Katherine Anne

    2016-01-01

    The health needs of the North West London population are changing. People are generally living longer and as a result a growing number are suffering from complex, long-term health conditions. This inevitably creates pressure on available services, to the point where there is a need to look at how these can be better provided. In North West London, the way hospitals and community health services are provided is being transformed to deliver a more co-ordinated and person centred service, achiev...

  6. Algebra of the Visual: The London Underground Map and the Art It Has Inspired

    Directory of Open Access Journals (Sweden)

    Alan Ashton-Smith

    2011-01-01

    Full Text Available "Algebra of the Visual: The London Underground Map and the Art It Has Inspired" by Alan Ashton-Smith. The London Underground symbolizes London, and the London Underground map, designed by Harry Beck in 1931, symbolizes the London Underground. Accordingly, Beck’s map has in itself come to be a recognizable signifier of London. Its impact resonates beyond this city though: it is also the prototype for metro maps worldwide, with its basic topological structure having been adopted for use on the subways of many other cities. (NANO: New American Notes Online

  7. IEEE Xplore® Digital Library. Quick user guides

    OpenAIRE

    2014-01-01

    Представлены руководства по работе с платформой IEEE Xplore® Digital Library, содержащей ресурсы в области электроники, радиосвязи, вычислительной техники, информационных технологий, энергетики, машиностроения, физики, химии, геологии, нанотехнологий на английском языке. Руководства: 1) Started with Your Search - Поиск, уточнение результатов, доступ к полнотекстовым документам, сохранение поисковых резкльтатов, расширенные функции; 2) Search and Save with Your File Cabinet - Поиск, уточнен...

  8. Investigating the annual behaviour of submicron secondary inorganic and organic aerosols in London

    Directory of Open Access Journals (Sweden)

    D. E. Young

    2014-07-01

    Full Text Available For the first time, the behaviour of non-refractory inorganic and organic submicron particulate through an entire annual cycle is investigated using measurements from an Aerodyne compact time-of-flight aerosol mass spectrometer (cToF-AMS located at a UK urban background site in North Kensington, London. We show secondary aerosols account for a significant fraction of the submicron aerosol burden and that high concentration events are governed by different factors depending on season. Furthermore, we demonstrate that on an annual basis there is no variability in the extent of secondary organic aerosol (SOA oxidation, as defined by the oxygen content, irrespective of amount. This result is surprising given the changes in precursor emissions and contributions as well as photochemical activity throughout the year; however it may make the characterisation of SOA in urban environments more straightforward than previously supposed. Organic species, nitrate, sulphate, ammonium, and chloride were measured during 2012 with average concentrations (±one standard deviation of 4.32 (±4.42, 2.74 (±5.00, 1.39 (±1.34, 1.30 (±1.52 and 0.15 (±0.24 μg m–3, contributing 43, 28, 14, 13 and 2% to the total submicron mass, respectively. Components of the organic aerosol fraction are determined using positive matrix factorisation (PMF where five factors are identified and attributed as hydrocarbon-like OA (HOA, cooking OA (COA, solid fuel OA (SFOA, type 1 oxygenated OA (OOA1, and type 2 oxygenated OA (OOA2. OOA1 and OOA2 represent more and less oxygenated OA with average concentrations of 1.27 (±1.49 and 0.14 (±0.29 μg m–3, respectively, where OOA1 dominates the SOA fraction (90%. Diurnal, monthly, and seasonal trends are observed in all organic and inorganic species, due to meteorological conditions, specific nature of the aerosols, and availability of precursors. Regional and transboundary pollution as well as other individual pollution events influence

  9. The management for tuberculosis control in Greater London in comparison with that in Osaka City: lessons for improvement of TB control management in Osaka City urban setting.

    Science.gov (United States)

    Ohkado, Akihiro; Williams, Gini; Ishikawa, Nobukatsu; Shimouchi, Akira; Simon, Carter

    2005-07-01

    The tuberculosis (TB) notification in Osaka City has been persistently high compared with other urban areas in Japan. Although the TB notification in Greater London has kept much lower level compared with that in Osaka City, it has been also persistently high compared with other urban areas in the UK. Nonetheless, the contexts of the two cities relating TB control programme as well as the epidemiological situation greatly vary; there must be some lessons to be learnt from each other to improve each TB control programme to tackle against TB more effectively. Comparing the epidemiological situation of TB in both cities, it is obvious that Osaka City suffers TB more than Greater London in terms of the TB notification rate. Concerning the context of the TB control programme, Osaka City has centralised approach with strong local government commitment; Greater London, on the other hand, has an approach that is greatly fragmented but coordinated through voluntary TB Networks. This paper aims to draw some constructive and practical lessons from Greater London TB control management for further improvement of Osaka City TB control management through literature review and interview to health professionals. TB epidemiology in Greater London shows distinct features in the extent of TB in new entrants and TB co-infected with HIV in comparison with those in Osaka City. TB epidemiology in Osaka City is to a great extent specifically related to homeless people whereas in Greater London, this relationship occurs to a lesser extent. Both areas have relatively high TB-notification rates compared with national figures, and they have "TB hot spots" where remarkably high TB-notification rates exist. TB control in Greater London is characterised with decentralised and devolved services to local government health authorities supplemented with co-ordinating bodies across sectors as well as across Greater London. Sector-wide TB Network as well as London TB Group (LTBG) and London TB Nurses

  10. Management of obstetric postpartum hemorrhage: a national service evaluation of current practice in the UK

    Directory of Open Access Journals (Sweden)

    Al Wattar BH

    2017-01-01

    Full Text Available Bassel H Al Wattar,1,* Jennifer A Tamblyn,2,* William Parry-Smith,2,* Mathew Prior,3,* Helen Van Der Nelson4,* On behalf of UK Audit and Research trainee Collaborative in Obstetrics and Gynaecology (UKARCOG 1Women’s Health Research Unit, Barts and the London School of Medicine and Dentistry, Queen Mary University London, London, UK; 2Institute of Metabolism and Systems Research (IMSR, University of Birmingham, Birmingham, UK; 3Division of Child Health, Obstetrics & Gynaecology, School of Medicine, University of Nottingham, Nottingham, UK; 4Academic Centre for Women’s Health, North Bristol NHS Trust, Bristol, UK *UKARCOG Background: Postpartum hemorrhage (PPH continues to be one of the major causes of maternal mortality and morbidity in obstetrics. Variations in practice often lead to adverse maternity outcomes following PPH. Our objective was to assess the current practice in managing PPH in the UK.Methods: We performed a national multicenter prospective service evaluation study over one calendar month and compared the current performance to national standards for managing PPH. We used a standardized data collection tool and collected data on patients’ demographics, incidence of PPH, estimated blood loss (EBL, prophylactic and treatment measures, onset of labor, and mode of delivery.Results: We collected data from 98 obstetric units, including 3663 cases of primary PPH. Fifty percent of cases were minor PPH (EBL 500–1000 mL, n=1900/3613, 52.6% and the remaining were moderate PPH (EBL >1000 to <2000 mL, n=1424/3613, 39.4% and severe PPH (EBL >2000 mL, n=289/3613, 8%. The majority of women received active management of the third stage of labor (3504/3613, 97% most commonly with Syntometrine intramuscular (1479/3613, 40.9%. More than half required one additional uterotonic agent (2364/3613, 65.4% most commonly with Syntocinon intravenous infusion (1155/2364, 48.8%. There was a poor involvement of consultant obstetricians and anesthetists in

  11. An Open Access Source for the Study of Religion and the Law: The Proceedings of the Old Bailey: London's Central Criminal Court 1674-1913

    Directory of Open Access Journals (Sweden)

    Fred Guyette

    2008-11-01

    Full Text Available The work of theological librarians is in a state of rapid flux as collections of digitized texts become more widely available, and as theological education continues to shift from paper to a more electronic research environment. /The Proceedings of the/ /Old Bailey, London 1674-1913 /is a rich collection of court records, now freely available on the World Wide Web (http://www.oldbaileyonline.org.uk/ . The study of a small, but meaningful selection of texts from the /OBP/ shows how theological librarians can use this resource to advance the conversation between religion and law. Five examples are offered to indicate how this might be done.

  12. The University College London Archive of Stuttered Speech (UCLASS)

    Science.gov (United States)

    Howell, Peter; Davis, Stephen; Bartrip, Jon

    2009-01-01

    Purpose: This research note gives details of 2 releases of audio recordings available from speakers who stutter that can be accessed on the Web. Method: Most of the recordings are from school-age children. These are available on the University College London Archive of Stuttered Speech (UCLASS) Web site, and information is provided about how to…

  13. Jack London and "the Call of the Wild"

    Institute of Scientific and Technical Information of China (English)

    徐晶

    2002-01-01

    The article vividly analyzes the characteristics of Jack London's writing theme that is the description of the con-flicts between nature and human. Based on the "call of the wild" and its hero Buck, It points out the author' s writingthoughts, that is strong will human show in their fight against nature.

  14. A fatal case of Lassa fever in London, January 2009.

    Science.gov (United States)

    Kitching, A; Addiman, S; Cathcart, S; Bischop, L; Krahé, D; Nicholas, M; Coakley, J; Lloyd, G; Brooks, T; Morgan, D; Turbitt, D

    2009-02-12

    In January 2009, the eleventh [corrected] case of Lassa fever imported to the United Kingdom was diagnosed in London. Risk assessment of 328 healthcare contacts with potential direct exposure to Lassa virus - through contact with the case or exposure to bodily fluids - was undertaken. No contacts were assessed to be at high risk of infection and no secondary clinical cases identified.

  15. JACK LONDON ETNÓLOGO AMATEUR DEL PUGILISMO

    Directory of Open Access Journals (Sweden)

    Loïc Wacquant

    2012-12-01

    Full Text Available De los relatos que Jack London ha consagrado al boxeo, A Piece of Steak es sin dudas aquel que merece hoy nuestra mayor atención, e incluso un lugar en el panteón de los textos literarios sobre el Noble Arte, y junto a él otros tres títulos...

  16. London tõukas New Yorgi troonilt / Kertu Ruus

    Index Scriptorium Estoniae

    Ruus, Kertu, 1977-

    2007-01-01

    Maailma finantskeskuste indeksi järgi on London tõuganud New Yorgi teisele kohale, neile järgnevad Hongkong, Singapur ja Zürich. Vt. samas: IPOd on USAs kokku kuivanud. Tabel: Londoni börsile tuli mullu rohkem firmasid

  17. The Maintenance of The London Underground Tube Tunnel Network

    Institute of Scientific and Technical Information of China (English)

    Gleig Frazer

    2004-01-01

    It is helpful to have a brief history of London Underground when considering any aspect of its maintenance or future development. The system has developed over more than 100 years and only comparatively recently come under the control of a single organisation. This partly explains the complexity that has resulted from differences in construction between lines. A brief History is accordingly appended to this presentation as Appendix B. The recent History outlines how Tube Lines have come to be involved with London Underground and explains a little of the reason for our existence. We are required to maintain and improve London Underground assets. Our performance has to be measurable and it follows that we need to know the current condition "value" of those assets. A large part of London Underground's infrastructure is tube tunnels some of which have not been fully assessed since they were first constructed in the 19th Century. They used materials whose physical and durability properties were not, at the time, fully understood; and they were designed on a very empirical basis if they were "designed" at all. Some shafts and other elements of the Tunnel Asset appeared to have been forgotten or lost when the Public Private Partnership (PPP) instigation procedures began in earnest in 1998. A major part of our current maintenance programme is thus to ascertain and agree the current condition and extent of approximately 178kilometres of tube tunnel asset that we are required to maintain and improve.

  18. A Multimodal Discourse Analysis of 2012 London Olympic Emblem

    Institute of Scientific and Technical Information of China (English)

    张瑞雪

    2012-01-01

    At present,communication is developing from mono-modality to multi-modality.The related study on multimodal discourse is becoming a hot issue.This paper will adopt the theory of Kress and van Leeuwen's visual grammar as the theoretical framework to analyze the 2012 London Olympic emblem,exploring the meanings hidden behind the visual images.

  19. 'ah famous citie' : women, writing, and early modern London

    NARCIS (Netherlands)

    Wilcox, Helen

    2010-01-01

    This article explores aspects of the textual relationship between women and early modern London by examining three verbal 'snapshots' of the city in works either written by women or focusing on women in their urban environment. The first text, Isabella Whitney's 'Wyll and Testament' (1573), addresse

  20. Intergenerational Learning between Children and Grandparents in East London

    Science.gov (United States)

    Kenner, Charmian; Ruby, Mahera; Jessel, John; Gregory, Eve; Arju, Tahera

    2007-01-01

    This study investigates the learning exchange between three- to six-year-old children and their grandparents, in Sylheti/Bengali-speaking families of Bangladeshi origin and monolingual English-speaking families living in east London. The following concepts from sociocultural theory are applied to this new area of intergenerational learning:…

  1. 'ah famous citie' : women, writing, and early modern London

    NARCIS (Netherlands)

    Wilcox - Boulton, Helen

    2010-01-01

    This article explores aspects of the textual relationship between women and early modern London by examining three verbal 'snapshots' of the city in works either written by women or focusing on women in their urban environment. The first text, Isabella Whitney's 'Wyll and Testament' (1573), addresse

  2. Middling migration: contradictory mobility experiences of Indian youth in London

    NARCIS (Netherlands)

    Rutten, M.; Verstappen, S.

    2012-01-01

    In this paper we examine the contradictory migration experiences of Indian youngsters who recently moved to Britain on a student or temporary work visa. All of them lived in London at the time of the interview, and are from middle class families in Gujarat. Like many of their peers in developing

  3. Participation and Performance at the London 2012 Olympics

    NARCIS (Netherlands)

    Kuper, Gerard H.; Sterken, Elmer

    2012-01-01

    The current paper predicts the medal tally for the London 2012 Olympic Games. The forecast procedure consists of analyzing participation and success at the country level of the three most recent editions of the Olympic Summer Games. Potential explanatory variables for medal winnings are income per c

  4. Entrepreneurship and UK Doctoral Graduates

    Science.gov (United States)

    Hooley, Tristram; Bentley, Kieran; Marriott, John

    2011-01-01

    This paper discusses the experience of UK doctoral graduates in pursuing entrepreneurial careers: there is evidence that this applies to a substantial number--about 10%--of doctoral graduates. The nature of their experience was explored using 37 interviews with doctoral entrepreneurs. The research was funded by Vitae (www.vitae.ac.uk), an…

  5. Impact on and use of an inner-city London Infectious Diseases Department by international migrants: a questionnaire survey

    Directory of Open Access Journals (Sweden)

    Holmes Alison

    2007-07-01

    Full Text Available Abstract Background The UK has witnessed a considerable increase in immigration in the past decade. Migrant may face barriers to accessing appropriate health care on arrival and the current focus on screening certain migrants for tuberculosis on arrival is considered inadequate. We assessed the implications for an inner-city London Infectious Diseases Department in a high migrant area. Methods We administered an anonymous 20-point questionnaire survey to all admitted patients during a 6 week period. Questions related to sociodemographic characteristics and clinical presentation. Analysis was by migration status (UK born vs overseas born. Results 111 of 133 patients completed the survey (response rate 83.4%. 58 (52.2% were born in the UK; 53 (47.7% of the cohort were overseas born. Overseas-born were over-represented in comparison to Census data for this survey site (47.7% vs 33.6%; proportional difference 0.142 [95% CI 0.049–0.235]; p = 0.002: overseas born reported 33 different countries of birth, most (73.6% of whom arrived in the UK pre-1975 and self-reported their nationality as British. A smaller number (26.4% were new migrants to the UK (≤10 years, mostly refugees/asylum seekers. Overseas-born patients presented with a broad range and more severe spectrum of infections, differing from the UK-born population, resulting in two deaths in this group only. Presentation with a primary infection was associated with refugee/asylum status (n = 8; OR 6.35 [95% CI 1.28–31.50]; p = 0.023, being a new migrant (12; 10.62 [2.24–50.23]; p = 0.003, and being overseas born (31; 3.69 [1.67–8.18]; p = 0.001. Not having registered with a primary-care physician was associated with being overseas born, being a refugee/asylum seeker, being a new migrant, not having English as a first language, and being in the UK for ≤5 years. No significant differences were found between groups in terms of duration of illness prior to presentation or duration of

  6. Sébastien Lechevalier (editor), The Great Transformation of Japanese Capitalism. London: Routledge, 2014. 240 pp

    DEFF Research Database (Denmark)

    Kravtsova, Victoria

    2015-01-01

    Book review of: Sébastien Lechevalier (editor), The Great Transformation of Japanese Capitalism. London: Routledge, 2014.......Book review of: Sébastien Lechevalier (editor), The Great Transformation of Japanese Capitalism. London: Routledge, 2014....

  7. IEEE 1547 and 2030 Standards for Distributed Energy Resources Interconnection and Interoperability with the Electricity Grid

    Energy Technology Data Exchange (ETDEWEB)

    Basso, T.

    2014-12-01

    Public-private partnerships have been a mainstay of the U.S. Department of Energy and the National Renewable Energy Laboratory (DOE/NREL) approach to research and development. These partnerships also include technology development that enables grid modernization and distributed energy resources (DER) advancement, especially renewable energy systems integration with the grid. Through DOE/NREL and industry support of Institute of Electrical and Electronics Engineers (IEEE) standards development, the IEEE 1547 series of standards has helped shape the way utilities and other businesses have worked together to realize increasing amounts of DER interconnected with the distribution grid. And more recently, the IEEE 2030 series of standards is helping to further realize greater implementation of communications and information technologies that provide interoperability solutions for enhanced integration of DER and loads with the grid. For these standards development partnerships, for approximately $1 of federal funding, industry partnering has contributed $5. In this report, the status update is presented for the American National Standards IEEE 1547 and IEEE 2030 series of standards. A short synopsis of the history of the 1547 standards is first presented, then the current status and future direction of the ongoing standards development activities are discussed.

  8. 2001年IEEE MTT-S介绍

    Institute of Scientific and Technical Information of China (English)

    洪伟

    2001-01-01

    @@ 2001年IEEE微波理论与技术国际会议(IEEE MTT-S)于5月20~25日在美国的凤凰城(Phoenix) 召开.其中,20、21和25日安排的是专题讨论会(Workshops)等,22~24日为分组学术报告. 本次会议共收到学术论文930篇,其中学生投稿论文242篇,这两项都刷新了MTT-S的记录. 经过250位专家的评审,从中录用了511篇论文,录用率为55%.这些学术论文安排在22~24三天的65个分组内进行学术交流,其中除了论文宣读(presentation)之外还在每天的下午安排了论文张贴交流(interactive forum).根据当前的热门研究领域,会议安排了20个专题讨论会(Workshop)和5个短课程(Short courses).此外,针对一些浮现出来的技术领域还设了 5个焦点分组(Focused sessions)、4个专题讨论会(Panel sessions)和1个辩论会(Rump s ession).与MTT-S联合召开的还有射频集成电路(RFIC)和自动射频技术组(ARFTG: Automat ic RF Technology Group)两个专门会议.在会议期间还举办了规模巨大的微波工业展览, 有800多家公司参展,展出的产品涉及微波毫米波元器件、模块、系统、芯片、测量设备、加工设备、设计软件等等.下面就这次会议的主要内容作简要介绍.一、分组学术交流 (Technique Sessions) 学术论文分65个组(Sessions)进行交流,内容涉及电磁场边值问题的分析方法、微波传输线与无源元件、封装与互连技术、非线性分析、微波有源器件、天线、智能天线、通信系统、卫星互连网、微波生物效应与医学应用、微波超导等.

  9. A Roof over your Head; House Price Peaks in the UK and Ireland

    CERN Document Server

    Richmond, P

    2006-01-01

    We analyse, following recent work of Roehner, changes in house prices for both the UK and Ireland. We conclude that prices in London have reached a tipping point and prices relative to inflation are set to fall over the next few years. If inflation does not rise then a hard landing seems likely. House prices in the Irish Republic are shown to have broken away from the moderate rise still to be found in Northern Ireland and Dublin has emerged as another global 'hot spot'. An evolution of Dublin house prices similar to that in London can be anticipated. Keywords: Econophysics, house prices, real estate, prediction PACS: 89.65.Gh, 89.90.+n

  10. Impact on and use of health services by international migrants: questionnaire survey of inner city London A&E attenders

    Directory of Open Access Journals (Sweden)

    Eliahoo Joseph

    2006-11-01

    Full Text Available Abstract Background Changing immigration trends pose new challenges for the UK's open access health service and there is considerable speculation that migrants from resource-poor countries place a disproportionate burden on services. Data are needed to inform provision of services to migrant groups and to ensure their access to appropriate health care. We compared sociodemographic characteristics and impact of migrant groups and UK-born patients presenting to a hospital A&E/Walk-In Centre and prior use of community-based General Practitioner (GP services. Methods We administered an anonymous questionnaire survey of all presenting patients at an A&E/Walk-In Centre at an inner-city London hospital during a 1 month period. Questions related to nationality, immigration status, time in the UK, registration and use of GP services. We compared differences between groups using two-way tables by Chi-Square and Fisher's exact test. We used logistic regression modelling to quantify associations of explanatory variables and outcomes. Results 1611 of 3262 patients completed the survey (response rate 49.4%. 720 (44.7% were overseas born, representing 87 nationalities, of whom 532 (73.9% were new migrants to the UK (≤10 years. Overseas born were over-represented in comparison to local estimates (44.7% vs 33.6%; p Conclusion Recently arrived migrants are a diverse and substantial group, of whom migrants from refugee-generating countries and asylum seekers comprise only a minority group. Service reorganisation to ensure improved access to community-based GPs and delivery of more appropriate care may lessen their impact on acute services.

  11. Performance Analysis of Sleep Mode Operation in IEEE 802.16m Mobile WiMAX

    Science.gov (United States)

    Baek, Sangkyu; Son, Jung Je; Choi, Bong Dae

    We mathematically analyze the sleep mode operation of IEEE 802.16m. The sleep mode operation for downlink traffic is modeled as a 3-dimensional discrete time Markov chain. We obtain the average power consumption of a mobile station and the average delay of a message. Numerical results match simulations very well. Numerical results show that there is a tradeoff between power consumption and message delay. We find the optimal lengths of sleep cycle and close-down time that minimize the power consumption while satisfying the quality of service (QoS) constraint on message delay. The power consumption of the sleep mode in IEEE 802.16m is better than that of sleep modes in legacy IEEE 802.16e standard under the same delay bound.

  12. Design of handoff procedures for broadband wireless access IEEE 802.16 based networks

    Directory of Open Access Journals (Sweden)

    V. Rangel–Licea

    2008-01-01

    Full Text Available IEEE 802.16 is a protocol for fixed broad band wire less access that is currently trying to add mobility among mobile users in the standard. However, mobility adds some technical barriers that should be solved first, this is the case of HO "handoff" (change of connection between two base stations "BS" by a mobile user. In this paper, the problem of HO in IEEE 802.16 is approached try ing to maintain the quality of service (QoS of mobile users. A mechanism for changing connection during HO is pre sented. A simulation model based on OPNET MODELER1 was developed to evaluate the performance of the proposed HO mechanism. Finally, this paper demonstrates that it is possible to implement a seam less HO mech a nism over IEEE 802.16 even for users with de manding applications such as voice over IP.

  13. An Analytical Model for the Performance Analysis of Concurrent Transmission in IEEE 802.15.4

    Directory of Open Access Journals (Sweden)

    Cengiz Gezer

    2014-03-01

    Full Text Available Interference is a serious cause of performance degradation for IEEE802.15.4 devices. The effect of concurrent transmissions in IEEE 802.15.4 has been generally investigated by means of simulation or experimental activities. In this paper, a mathematical framework for the derivation of chip, symbol and packet error probability of a typical IEEE 802.15.4 receiver in the presence of interference is proposed. Both non-coherent and coherent demodulation schemes are considered by our model under the assumption of the absence of thermal noise. Simulation results are also added to assess the validity of the mathematical framework when the effect of thermal noise cannot be neglected. Numerical results show that the proposed analysis is in agreement with the measurement results on the literature under realistic working conditions.

  14. Improving IEEE 802.15.4 for Low-Latency Energy-Efficient Industrial Applications

    Science.gov (United States)

    Chen, Feng

    The IEEE 802.15.4 standard for LR-WPAXs is becoming a de-facto standard for Wireless Sensor Xetworks (WSXs) applications in industrial fields. In this paper, we evaluate the latency performance of the IEEE 802.15.4 protocol based on a typical industrial scenario: a star network with 20 devices that send short messages (1 Byte) to the PAX coordinator. We analyzed the behavior of the GTS mechanism in the standard analytically. The results reveal essential limitations of the standard for low-latency applications in automation environments. According to our findings, we propose an enhanced protocol version that fully supports industry demands on low-latency communication. Our protocol version uses the original physical layer and, thus, can be implemented conveniently using cheap IEEE 802.15.4 hardware. The analytical results prove that we are able to meet the guaranteed low latency of 10 ms as specified by typical automation environments.

  15. The scalable coherent interface, IEEE P1596, status and possible applications to data acquisition and physics

    Energy Technology Data Exchange (ETDEWEB)

    Gustavson, D.B.

    1990-01-01

    IEEE P1596, the Scalable Coherent Interface (formerly known as SuperBus) is based on experience gained while developing Fastbus (ANSI/IEEE 960-1986, IEC 935), Futurebus (IEEE P896.x) and other modern 32-bit buses. SCI goals include a minimum bandwidth of 1 GByte/sec per processor in multiprocessor systems with thousands of processors; efficient support of a coherent distributed-cache image of distributed shared memory; support for repeaters which interface to existing or future buses; and support for inexpensive small rings as well as for general switched interconnections like Banyan, Omega, or crossbar networks. This paper presents a summary of current directions, reports the status of the work in progress, and suggests some applications in data acquisition and physics. 7 refs.

  16. An Analytical Model for the Performance Analysis of Concurrent Transmission in IEEE 802.15.4

    Science.gov (United States)

    Gezer, Cengiz; Zanella, Alberto; Verdone, Roberto

    2014-01-01

    Interference is a serious cause of performance degradation for IEEE802.15.4 devices. The effect of concurrent transmissions in IEEE 802.15.4 has been generally investigated by means of simulation or experimental activities. In this paper, a mathematical framework for the derivation of chip, symbol and packet error probability of a typical IEEE 802.15.4 receiver in the presence of interference is proposed. Both non-coherent and coherent demodulation schemes are considered by our model under the assumption of the absence of thermal noise. Simulation results are also added to assess the validity of the mathematical framework when the effect of thermal noise cannot be neglected. Numerical results show that the proposed analysis is in agreement with the measurement results on the literature under realistic working conditions. PMID:24658624

  17. IEEE 1451.2 based Smart sensor system using ADuc847

    Science.gov (United States)

    Sreejithlal, A.; Ajith, Jose

    IEEE 1451 standard defines a standard interface for connecting transducers to microprocessor based data acquisition systems, instrumentation systems, control and field networks. Smart transducer interface module (STIM) acts as a unit which provides signal conditioning, digitization and data packet generation functions to the transducers connected to it. This paper describes the implementation of a microcontroller based smart transducer interface module based on IEEE 1451.2 standard. The module, implemented using ADuc847 microcontroller has 2 transducer channels and is programmed using Embedded C language. The Sensor system consists of a Network Controlled Application Processor (NCAP) module which controls the Smart transducer interface module (STIM) over an IEEE1451.2-RS232 bus. The NCAP module is implemented as a software module in C# language. The hardware details, control principles involved and the software implementation for the STIM are described in detail.

  18. A 1-GHz charge pump PLL frequency synthesizer for IEEE 1394b PHY

    DEFF Research Database (Denmark)

    Ji, J.; Liu, H.; Li, Q.

    2012-01-01

    This paper presents an implementation of multi-rate SerDes transceiver for IEEE 1394b applications. Simple and effective pre-emphasis and equalizer circuits are used at transmitter and receiver, respectively. A phase interpolator based clock and data recovery circuit with optimized linearity...... is also described. With an on-chip fully integrated phase locked loop, the transceiver works at data rates of 100Mb/s, 400Mb/s and 800Mb/s, supporting three different operating modes of S100b, S400b and S800b for IEEE 1394b. The chip has been fabricated using 0.13μm technology. The die area of transceiver...... is 2.9*1.6 mm including bonding pads and the total power dissipation is 284 mW with 1.2V and 3.3V supply voltages. © 2012 IEEE....

  19. Throughput and delay analysis of IEEE 802.15.6-based CSMA/CA protocol.

    Science.gov (United States)

    Ullah, Sana; Chen, Min; Kwak, Kyung Sup

    2012-12-01

    The IEEE 802.15.6 is a new communication standard on Wireless Body Area Network (WBAN) that focuses on a variety of medical, Consumer Electronics (CE) and entertainment applications. In this paper, the throughput and delay performance of the IEEE 802.15.6 is presented. Numerical formulas are derived to determine the maximum throughput and minimum delay limits of the IEEE 802.15.6 for an ideal channel with no transmission errors. These limits are derived for different frequency bands and data rates. Our analysis is validated by extensive simulations using a custom C+ + simulator. Based on analytical and simulation results, useful conclusions are derived for network provisioning and packet size optimization for different applications.

  20. An analytical model for the performance analysis of concurrent transmission in IEEE 802.15.4.

    Science.gov (United States)

    Gezer, Cengiz; Zanella, Alberto; Verdone, Roberto

    2014-03-20

    Interference is a serious cause of performance degradation for IEEE802.15.4 devices. The effect of concurrent transmissions in IEEE 802.15.4 has been generally investigated by means of simulation or experimental activities. In this paper, a mathematical framework for the derivation of chip, symbol and packet error probability of a typical IEEE 802.15.4 receiver in the presence of interference is proposed. Both non-coherent and coherent demodulation schemes are considered by our model under the assumption of the absence of thermal noise. Simulation results are also added to assess the validity of the mathematical framework when the effect of thermal noise cannot be neglected. Numerical results show that the proposed analysis is in agreement with the measurement results on the literature under realistic working conditions.

  1. Design and Implementation of IEEE 802.15.4 Mac Protocol on FPGA

    CERN Document Server

    Bhat, Naagesh S

    2012-01-01

    The IEEE 802.15.4 is a wireless standard introduced for low power, low cost wireless communication with moderate data rates. In the next few years, it is expected that Low Rate Wireless Personal Area Networks (LR-WPAN) will be used in a wide variety of embedded applications, including home automation, industrial sensing and control, environmental monitoring and sensing. In these applications, numerous embedded devices running on batteries are distributed in an area communicating via wireless radios. This work presents a method which can be used for comparing current consumption of wireless data transfer embedded systems. This paper implements a small subset of the IEEE 802.15.4 protocol to achieve a point to point communication. The implemented protocol uses 802.15.4 MAC compliant data and acknowledgment packets. Current consumption is measured while doing one data packet transmission. Measurements are compared with existing work. IEEE 802.15.4 protocol implementation is done using Verilog language. Code impl...

  2. PERFORMANCE STUDY OF DISTRIBUTED COORDINATION FUNCTION OVER IEEE 802.11A PHYSICAL LAYER

    Directory of Open Access Journals (Sweden)

    S. SELVAKENEDDY

    2006-06-01

    Full Text Available IEEE 802.11a is one of the latest standards to be released by the IEEE Project 802 for wireless LANs. It has specified an additional physical layer (PHY to support higher data rates, and is termed as the orthogonal frequency division multiplexing (OFDM. In order to exploit its benefits, one of the medium access control (MAC protocols specified in the IEEE 802.11 specification is called distributed coordination function (DCF. DCF is a carrier sense multiple access with collision avoidance (CSMA/CA scheme with slotted binary exponential backoff. The frames can be transmitted using the basic access scheme or the RTS/CTS scheme in DCF. It was demonstrated previously that the RTS/CTS mechanism works well in most scenarios for the previously specified PHYs. In this work, a simple simulator is developed to verify the scalability of the RTS/CTS mechanism over OFDM PHY, which supports much higher data rates.

  3. UK malaria treatment guidelines.

    Science.gov (United States)

    Lalloo, David G; Shingadia, Delane; Pasvol, Geoffrey; Chiodini, Peter L; Whitty, Christopher J; Beeching, Nicholas J; Hill, David R; Warrell, David A; Bannister, Barbara A

    2007-02-01

    Malaria is the tropical disease most commonly imported into the UK, with 1500-2000 cases reported each year, and 10-20 deaths. Approximately three-quarters of reported malaria cases in the UK are caused by Plasmodium falciparum, which is capable of invading a high proportion of red blood cells and rapidly leading to severe or life-threatening multi-organ disease. Most non-falciparum malaria cases are caused by Plasmodium vivax; a few cases are caused by the other two species of Plasmodium: Plasmodium ovale or Plasmodium malariae. Mixed infections with more than 1 species of parasite can occur; they commonly involve P. falciparum with the attendant risks of severe malaria. Management of malaria depends on awareness of the diagnosis and on performing the correct diagnostic tests: the diagnosis cannot be excluded until 3 blood specimens have been examined by an experienced microscopist. There are no typical clinical features of malaria, even fever is not invariably present. The optimum diagnostic procedure is examination of thick and thin blood films by an expert to detect and speciate the malarial parasites; P. falciparum malaria can be diagnosed almost as accurately using rapid diagnostic tests (RDTs) which detect plasmodial antigens or enzymes, although RDTs for other Plasmodium species are not as reliable. The treatment of choice for non-falciparum malaria is a 3-day course of oral chloroquine, to which only a limited proportion of P. vivax strains have gained resistance. Dormant parasites (hypnozoites) persist in the liver after treatment of P. vivax or P. ovale infection: the only currently effective drug for eradication of hypnozoites is primaquine. This must be avoided or given with caution under expert supervision in patients with glucose-6-phosphate dehydrogenase deficiency (G6PD), in whom it may cause severe haemolysis. Uncomplicated P. falciparum malaria can be treated orally with quinine, atovaquone plus proguanil (Malarone) or co-artemether (Riamet

  4. 基于IEEE 1149.X标准的测试技术研究%Research of the Test Techniques Based on IEEE 1149.X

    Institute of Scientific and Technical Information of China (English)

    姜鹏; 沈绪榜

    2004-01-01

    IEEE1149标准及其子标准是基于边界扫描的测试技术,它们针对不同的应用环境采用相应的技术标准.它们所提供的解决方案极大地方便了芯片级、板级、系统级及数字网络的测试.本文讨论了IEEE1149.X中各标准的原理、结构,分析了各项技术的发展及应用,并举例说明了在实际中的测试应用.

  5. 结合案例探讨IEEE 802.X协议检索策略%Analysis of Search of IEEE 802.X Protocol Associated with Actual Cases

    Institute of Scientific and Technical Information of China (English)

    李玉萍

    2015-01-01

    在涉及IEEE 802.X的发明专利申请的检索过程中,仅在专利数据库中很难检索到与专利申请最接近的现有技术,常常需要转到非专利数据库进行检索,通过两个实际案例,探讨了如何对涉及IEEE 802.X协议的发明专利申请进行有效检索,从而提出一种准确、快速、高效地检索现有技术的方法,为审查工作提供参考,也为该领域的发明人、申请人提供更多的现有技术检索思路和方式.

  6. Anthropological demography in Europe: Methodological lessons from a comparative ethnographic study in Athens and London

    Directory of Open Access Journals (Sweden)

    Katerina Georgiadis

    2007-07-01

    Full Text Available This paper offers a descriptive account of the methods used to conduct a comparative ethnographic study of below-replacement fertility in Athens, Greece and London, UK. It argues that in order for anthropology and demography to forge a closer relationship each discipline first needs to gain a deeper appreciation of the other's methodological perspectives. The following discussion presents the key anthropological approaches employed to realize a research project on low fertility in Europe, and provides justification for their use. While the practices described in this paper might be familiar to anthropologists and qualitative demographers, they are less well-known in the wider demographic community. Those convinced of the benefits of the ethnographic approach to the study of fertility are also invited to consider the specific obstacles encountered in the course of this enquiry. This paper reaches the following methodological conclusions: 1 Findings from two ethnographic studies of low fertility can be compared and generalised if such concepts as 'comparison' and 'generalisation' are understood in the anthropological sense. 2 Those investigating fertility in Europe must remain critical of their position relative to their study participants, even if they are undertaking research 'at home'. 3 Exploring attitudes towards reproduction and experiences of family-formation in an urban setting presents unique challenges as does 4 asking women about their childbearing beliefs and practices. 5 Analysing press perspectives on low fertility must involve treating media representations as 'discourse' and 6 qualitative studies are invaluable to the low fertility debate because of their thematic contributions.

  7. Seven years of teenage pregnancy in an inner London genitourinary medicine service - a retrospective cohort study.

    Science.gov (United States)

    Hegazi, Aseel; Daley, Natalie; Williams, Elizabeth; McLeod, Felicity; Rafiezadeh, Saba; Prime, Katia

    2014-12-01

    Young people attending genitourinary medicine services are at high risk of unplanned pregnancy. We performed a retrospective cohort study to identify characteristics of pregnant teenagers accessing an inner London genitourinary medicine service. There were 481 pregnancies in 458 teenagers with 54 previous pregnancies and 46 previous terminations of pregnancy. The under-18 and under-16 teenage pregnancy rates were 92.1 and 85.8 per 1000 age-matched clinic attendees, respectively. Median age was 17.1 years. 'Black Other' teenagers ('Black British', 'Mixed White-Black Caribbean' and 'Mixed White-Black African') were over-represented, compared to our clinic population, while those of White ethnicity were under-represented. Few pregnancies (1.5%) were planned with the majority (64%) intending terminations of pregnancy. Most teenagers did not use consistent contraception. Two-thirds of patients had attended genitourinary medicine services in the past and sexually transmitted infection prevalence at presentation was high. Effectively targeting the sexual and reproductive health needs of teenage genitourinary medicine clinic attendees may have a significant impact on reducing sexually transmitted infections, unplanned pregnancy and terminations of pregnancy in this group. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  8. ICU fire evacuation preparedness in London: a cross-sectional study.

    Science.gov (United States)

    Murphy, G R F; Foot, C

    2011-05-01

    Hospital fires present a sporadic but significant threat to patients and staff. This is especially so within an intensive care unit (ICU) setting, due to the complexity of moving acutely unwell patients reliant on invasive monitoring and organ support. Despite an average of 500 in-hospital fires reported to the UK department of health per annum, causing 65 injuries and 1-2 fatalities, the readiness of ICUs for urgent evacuation has not been assessed. A cross-sectional survey of all 50 adult and paediatric ICUs within the London Postgraduate Deanery was conducted; neonatal units were excluded. The senior nurse at each unit was asked to complete a 90-question structured questionnaire, covering unit patient characteristics, design, equipment, training, and their evacuation plan. Thirty-five of 50 (70%) responded within 2 months of the study. Significant weaknesses were reported in unit design, equipment, and planning. Unit design was compromised by inadequate fire doors (20%), ventilation cut-outs (17%), and escape routes (up to 60%). The ability to evacuate multiple patients simultaneously may be limited by a lack of portable monitoring equipment (49% of beds) and emergency drug supplies (20% of beds). Evacuation plans were often limited in their scope (96% expected to remain on their floor; 14% had plans to obtain medications after evacuation), and not rehearsed (60%). Staff training, while well provided for permanent staff, is less so for temporary staff (34%). Forward planning for an urgent evacuation can be improved.

  9. Key Barriers to Community Cohesion: Views from Residents of 20 London Deprived Neighbourhoods

    Science.gov (United States)

    Bertotti, Marcello; Adams-Eaton, Faye; Sheridan, Kevin; Renton, Adrian

    2016-01-01

    The notion of community has been central to the political project of renewal of New Labour in the UK. The paper explores how the discourses of community are framed within New Labour and discusses these in the light of the results from research which focuses on how people within urban deprived areas construct their community. It draws upon the results of one part of a larger research project (the ‘Well London’ programme) which aimed to capture the views of residents from 20 disadvantaged neighbourhoods throughout London using an innovative qualitative method known as the ‘World Café’. Our results show the centrality of young people to the development of cohesive communities, the importance of building informal relationships between residents alongside encouraging greater participation to policy making, and the need to see these places as fragile and temporary locations but with considerable social strengths. Government policies are only partially addressing these issues. They pay greater attention to formally encouraging citizens to become more involved in policy making, largely ignore the contribution young people could make to the community cohesion agenda, and weakly define the shared norms and values that are crucial in building cohesive communities. Thus, the conclusion is that whilst an emphasis of the government on ‘community’ is to be welcome, more needs to be done in terms of considering the ‘voices’ of the community as well as enabling communities to determine and act upon their priorities.

  10. Integrating research & teaching: the Queen Mary, University of London module in Geodiversity & Geoconservation

    Science.gov (United States)

    Gray, M.

    2012-04-01

    The School of Geography at Queen Mary, University of London has been running a Level 6 (undergraduate) module in "Geodiversity & Geoconservation" since 2004. The course is based around the book Geodiversity: valuing and conserving abiotic nature (John Wiley, 2004) but lectures are used to update each topic based on the latest research. The course is divided into 5 parts: 1. Defining and describing geodiversity - which discusses the concept of geodiversity, its definition and the nature of the geodiversity of Planet Earth; 2. Values of, and threats to, geodiversity - a lecture on valuing geodiversity is now based around important research on the role of geodiversity in "ecosystem services" assessments. A second lecture covers the major threats to geodiversity; 3. The protected area approach - lectures here cover geological World Heritage Sites, Global Geoparks, GSSPs, and national geoconservation systems in the UK, USA and other parts of the world; 4. Protecting geodiversity in the wider landscape - the contribution of geology and geomorphology to landscape character are described, together with the role of land-use planning and policy-making in protecting geodiversity. 5. Putting it all together - lectures here emphasize that geodiversity is an important basis for geoconservation, that different geoconservation methods are appropriate to different elements of geodiversity, and that integrated geo/bio conservation is essential. A field trip to three Chalk/Quaternary Sites of Special Scientific Interest in East Sussex is included which discusses some of the planning issues that have arisen at these sites, a theme that is expanded in the lectures.

  11. 基于IEEE802.16e睡眠模式的研究%Performance analysis of sleep mode operation in IEEE802.16e

    Institute of Scientific and Technical Information of China (English)

    顾俊杰; 杨宇航

    2009-01-01

    The IEEE802.16e is a standard of emerging broadband wireless access system which supports the mobility. The mobile subscribers (MSS) are mainly powered by the batteries, so the sleep mode mechanism becomes an important component for the MSS which can effectively manage the limited energy, and prolong the using time of the once-charged batteries.This paper introduced the standardized sleep mode in IEEE802.16e,then it analyzed the average energy consumption and the average packet delay under sleep mode by building a semi-Markov chain,and gave the simulation results by NS2 at last.%IEEE802.16e标准是支持终端移动性的无线城域网接人标准.由于移动终端是由电池供电的,而休眠模式作为其必备功能,能有效管理其有限的电池容量,延长其单次充电使用时间.首先介绍了IEEE802.16e标准建议的睡眠模式,然后通过建立马尔可夫链模型对睡眠模式下的平均能量消耗及平均包延迟进行分析,最后NS2工具对分析结果进行NS2仿真和讨论.

  12. IEEE 802.11 DCF协议性能分析模型%Performance Analysis Model for IEEE 802.11 Distributed Coordination Function Protocol

    Institute of Scientific and Technical Information of China (English)

    钟萍; 施海彬; 庄玉祥; 石江宏; 陈辉煌

    2013-01-01

    提出了一种改进的二维Markov链模型用于分析IEEE 802.11 DCF协议.该模型不仅考虑实际应用中饱和业务量和非饱和业务量的情况,而且考虑DCF协议的退避计时器的冻结状态和有限的重传次数.通过对该Markov链模型稳定状态的求解并结合M/M/1/K排队模型,导出了DCF系统性能的理论模型.仿真结果表明,该理论模型能够精确地预测广义IEEE 802.11 DCF协议的系统性能.%This paper proposes an improved two-dimensional Markov chain model for the performance analysis of the IEEE 802.11 DCF protocol. The model is applicable to both saturated and unsaturated traffic conditions. Moreover, it extends the existing models to take into account previously-ignored MAC layer factors such as backoff freezing and limited times of retry. In addition, by deriving the stationary state of the Markov model and considering an M/M/1/K queuing model, we further derive a theoretical model for evaluating performance of the general IEEE 802.11 DCF protocols. Accuracy of the proposed theoretical model is validated with simulation results.

  13. Communicating geohazard information for emergency responders, a case study from the UK.

    Science.gov (United States)

    Banks, Vanessa; Cooper, Anthony

    2016-04-01

    SSS11.4/ESSI4.6/HS11.39/NH9.13 Communication of uncertain information in earth sciences: data, models and visualization Communicating geohazard information for emergency responders, a case study from the UK. Cooper, A. H.1, Banks, V.J.1, Cowup, P.2, Curness, J.3, Davis, R.4, Dawson, L3. and Gazzard, L.4 1 British Geological Survey, Keyworth, NG12 5GG, UK 2 London Fire Brigade, 169 Union Street, London, SE1 0LL, UK 3.Coventry University, Priory Street, Coventry, CV1 5FB, UK 4.Avon Fire and Rescue, Temple Back, Bristol, BS1 6EU, UK. In February 2013 a sinkhole opened beneath a Florida Home resulting in the loss of a life and demolition of the affected home. The resulting void was in the order of 15 m deep. Neighbouring homes also had to be demolished. Television footage of this unfortunate incident resonated with an Assistant Commissioner of the London Fire Brigade who questioned whether or not such a feature would be recognised in the UK and if so, how the emergency response would be managed. Stemming from this, the British Geological Survey was invited to work with the Chief Fire Officers Association Urban Search and Rescue working group on geohazards. The aim of this group was to develop national tactical operational guidance on geohazards that would form the basis for regional guidance and training. The project was addressed collaboratively providing opportunities for two students from the Coventry University Disaster Management course, that were on placements with Avon Fire and Rescue, to work with the BGS to develop the guidance. Key to the success of the project was an iterative approach to knowledge exchange with respect to firstly, the characterization of the geohazards, and the processes and uncertainties associated with them and secondly, with respect to emergency responders' needs and priorities. Effective communication was achieved through challenging and rationalising the geoscience language for the end user and through a series of customised

  14. Research of Bus Signals Extension in IEEE Std 1641-2010%IEEE Std 1641中总线类信号扩展方法研究

    Institute of Scientific and Technical Information of China (English)

    陈育良; 牛双诚; 曲晓燕

    2012-01-01

    With a 4 layers model, IEEE Std 1641 - 2010 provides the capability to describe and control signals, but not include one of the most important signal, bus signals. After researching way of bus signals extension in C/ATLAS, this paper gives an model of bus instruments using the reference of its designing idea, and accomplish bus signals extension by extending new signals. It also gives TPL statement of new signals. Using this method, it fulfill test well in an ATS.%IEEE Std 1641-2010中提出STD四层结构模型,完成信号的描述和控制功能,但没有提供总线信号定义和描述,而总线信号则是自动测试中最重要信号之一;针对此问题,文中通过深入研究C/ATLAS中总线类信号的扩展方法,借鉴其设计思想,提出了满足IEEE Std 1641设计思想和原则的总线信号仪器模型,通过扩展新信号的方法完成多种总线信号扩展,并给出其TPL语言支持,经实际系统中使用,很好地完成了测试测量功能.

  15. 面向IEEE 802.16e的高效LDPC编码器设计%Design of High Efficient LDPC Encoder in IEEE 802.16e

    Institute of Scientific and Technical Information of China (English)

    李书洋; 胡剑浩; 陈杰男

    2012-01-01

    基于矩阵乘法的高斯消元法提出了一种通用的LDPC编码器结构,该结构使用移位寄存器和简单的选线实现了复杂的矩阵向量相乘运算并且不需要存储庞大的校验矩阵.然后根据IEEE 802.16e标准中对校验矩阵的定义,利用FPGA实现了编码器的硬件结构,并且由仿真结果可知这种LDPC编码器结构降低了逻辑资源开销,提高了编码速度.%In this paper, a high efficient LDPC encoder structure is proposed for IEEE 802. 16e with Gaussian elimination algorithm based on matrix multiplication. The matrix-vector multiplication is implemented with a shift register and a simple line selection in the proposed encoder, which is memory free structure for check matrix. According to IEEE 802.16e, the proposed encoder is implemented with FPGA. Compared with existing LDPC encoder, the proposed scheme can provide higher speed of encoding with less logic resources.

  16. Test-Driven Development of IEEE 1451 Transducer Services and Application

    Directory of Open Access Journals (Sweden)

    S. Ranđić

    2012-06-01

    Full Text Available IEEE 1451 standard defines the methods of integrating smart transducers into communicating networks. Interface between a user application and a field of transducers, known as Transducer Services API is defined by standrad IEEE 1451.0. This paper presents the use of Test- Driven Design (TDD in developing methods for accessing transducer services using Transducer Services API and developing web applications which access this services over the network. The characteristics of TDD and its benefits are presented and the way of realization for one method is shown using Java and JUnit framework to run tests.

  17. IEEE 802.11e (EDCA analysis in the presence of hidden stations

    Directory of Open Access Journals (Sweden)

    Xijie Liu

    2011-07-01

    Full Text Available The key contribution of this paper is the combined analytical analysis of both saturated and non-saturated throughput of IEEE 802.11e networks in the presence of hidden stations. This approach is an extension to earlier works by other authors which provided Markov chain analysis to the IEEE 802.11 family under various assumptions. Our approach also modifies earlier expressions for the probability that a station transmits a packet in a vulnerable period. The numerical results provide the impact of the access categories on the channel throughput. Various throughput results under different mechanisms are presented.

  18. A New Analytic Method for IEEE 802.11 Distributed Coordination Function

    Science.gov (United States)

    Hwang, Gang Uk; Chung, Min Young; Lee, Yutae

    In this paper, we consider a network of N identical IEEE 802.11 DCF (Distributed Coordination Function) terminals with RTS/CTS mechanism, each of which is assumed to be saturated. For performance analysis, we propose a simple and efficient mathematical model to derive the statistical characteristics of the network such as the inter-transmission time of packets in the network and the service time (the inter-transmission time of successful packet transmissions) of the network. Numerical results and simulations are provided to validate the accuracy of our model and to study the performance of the IEEE 802.11 DCF network.

  19. International Conference on Grey Systems and intelligent Services (IEEE GSIS 2009)

    CERN Document Server

    Liu, Sifeng; Advances in Grey Systems Research

    2010-01-01

    This book contains contributions by some of the leading researchers in the area of grey systems theory and applications. All the papers included in this volume are selected from the contributions physically presented at the 2009 IEEE International Conference on Grey Systems and Intelligent Services, November 11 – 12, 2009, Nanjing, Jiangsu, People’s Republic of China. This event was jointly sponsored by IEEE Systems, Man, and Cybernetics Society, Natural Science Foundation of China, and Grey Systems Society of China. Additionally, Nanjing University of Aeronautics and Astronautics also invested heavily in this event with its direct and indirect financial and administrative supports.

  20. BER Analysis Of IEEE802.11n MIMO System Using MMSE And ZF Detectors

    Directory of Open Access Journals (Sweden)

    Ye Lwin Oo

    2015-06-01

    Full Text Available Abstract With the increasing demand of higher data rate for telecommunication the IEEE802.11n standard was constituted in 2009. The most important character of the standard is MIMO-OFDM which not only improves the throughput but also the spectrum efficiency and channel capacity. And in wireless communication the role of MIMO detectors plays an important part to remove inter-symbol interference ISI caused by multipath fading channel. In this paper the BER performance of IEEE 802.11n for 3x2 4x2 and 4x3 antennas are compared using MMSE and ZF detectors in Matlab Simulink.

  1. Direct Sequence Spread Spectrum Steganographic Scheme for IEEE 802.15.4

    CERN Document Server

    Zielinska, Elzbieta

    2011-01-01

    This work addresses the issues related to network steganography in IEEE 802.15.4 Wireless Personal Area Networks (WPAN). The proposed communication scheme employs illicit Direct Sequence Spread Spectrum code sequences for the transmission of steganographic data. The presented approach is a compromise between minimising the probability of covert channel disclosure and providing robustness against random errors and a high steganographic data rate. The conducted analyses show that it is possible to create a covert channel with a data rate comparable to the raw data rate of IEEE 802.15.4 without much impact on the perceived receiver sensitivity, the Chip Error Rate and the Bit Error Rate.

  2. GE networked mass storage solutions supporting IEEE network mass storage model

    Science.gov (United States)

    Herzog, Donald

    1993-01-01

    The General Electric Government Communications Systems Department (GE/GCSD) has developed a near real time digital data storage and retrieval system that extends the capabilities currently available in today's marketplace. This system called DuraStore uses commercially available rotary tape drive technology with ANSI/IEEE standards for automated magnetic tape based data storage. It uses a nonproprietary approach to satisfy a wide range of data rates and storage capabilities requirements and is compliant with the IEEE Network Storage Model. Rotary tape drives, standard interfaces, application specific hardware/software, networked automated tape libraries, library administrator, write protection, volume/physical media linkages, and maximum resource utilization are addressed.

  3. IEEE 802.17与弹性分组环

    Institute of Scientific and Technical Information of China (English)

    马上; 马立香

    2004-01-01

    2004年6月发布的IEEE802.1 7标准规范了弹性分组环(RPR)技术.RPR针对承载IP业务进行优化,是构建IP城域网极具潜力的技术.本文概述IEEE 802.17/RPR技术,重点概述RPR的带宽分配、空间重用、自动拓扑发现及保护等关键技术,比较分析RPR相对其它城域网技术的优势.

  4. Chair's Introduction to 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis

    Institute of Scientific and Technical Information of China (English)

    Rueywen Liu

    2009-01-01

    @@ Based on the recommendation of ICTD'09 TPC members, this Special Issue of the Journal of Electronic Science & Technology of China (JESTC) contained 22 high quality papers selected from the Proceedings of 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis (ICTD'09) which is fully sponsored by the IEEE Circuits and Systems Society (CASS), and is technically co-sponsored by the University of Electronic Science and Technology of China (UESTC), the Chinese Institute of Electronics (CIE), the China Instrument & Control Society (CIS), and organized by UESTC.

  5. Queuing Analysis for IEEE 802.11e Networks in Non-Saturation Environments

    Directory of Open Access Journals (Sweden)

    Eui-Jik Kim

    2012-04-01

    Full Text Available This paper presents an analytical model for the performance evaluation of an IEEE 802.11e network in non‐saturation environments. We first characterize the probability distribution of the MAC layer packet service time. Based on the probability distribution model of the MAC layer packet service time, we then study the queuing performance of the wireless local area networks (WLANs at different traffic loads based on the IEEE 802.11e MAC protocol. The numerical results show that we can choose a feasible number and bandwidth of the node which determines the system performance that a user demands.

  6. Analysis Of Impact Of Various Parameters On BER Performance For IEEE 802.11b

    Directory of Open Access Journals (Sweden)

    Nilesh B. Kalani

    2015-08-01

    Full Text Available Abstract This paper discusses about IEEE 802.11b simulation model implemented using LabVIEW software and its analyses for impact on bit error rate BER for different parameters as channel type channel number data transmission rate and packet size. Audio file is being transmitted processed and analyzed using the model for various parameters. This paper gives analysis of BER verses ESN0 for various parameter like data rate packet size and communication channel for the IEEE 802.11b simulation model generated using LabVIEW. It is proved that BER can be optimized by tweaking different parameters of wireless communication system.

  7. Reactive GTS Allocation Protocol for Sporadic Events Using the IEEE 802.15.4

    Directory of Open Access Journals (Sweden)

    Mukhtar Azeem

    2014-01-01

    by the IEEE 802.15.4 standard. The proposed control protocol ensures that a given offline sporadic schedule can be adapted online in a timely manner such that the static periodic schedule has not been disturbed and the IEEE 802.15.4 standard compliance remains intact. The proposed protocol is simulated in OPNET. The simulation results are analyzed and presented in this paper to prove the correctness of the proposed protocol regarding the efficient real-time sporadic event delivery along with the periodic event propagation.

  8. The sexual attitudes and lifestyles of London's Eastern Europeans (SALLEE Project: design and methods

    Directory of Open Access Journals (Sweden)

    French Rebecca S

    2009-10-01

    Full Text Available Abstract Background Since May 2004, ten Central and Eastern European (CEE countries have joined the European Union, leading to a large influx of CEE migrants to the United Kingdom (UK. The SALLEE project (sexual attitudes and lifestyles of London's Eastern Europeans set out to establish an understanding of the sexual lifestyles and reproductive health risks of CEE migrants. CEE nationals make up a small minority of the population resident in the UK with no sampling frame from which to select a probability sample. There is also difficulty estimating the socio-demographic and geographical distribution of the population. In addition, measuring self-reported sexual behaviour which is generally found to be problematic, may be compounded among people from a range of different cultural and linguistic backgrounds. This paper will describe the methods adopted by the SALLEE project to address these challenges. Methods The research was undertaken using quantitative and qualitative methods: a cross-sectional survey of CEE migrants based on three convenience samples (recruited from community venues, sexual health clinics and from the Internet and semi-structured in-depth interviews with a purposively selected sample of CEE migrants. A detailed social mapping exercise of the CEE community was conducted prior to commencement of the survey to identify places where CEE migrants could be recruited. A total of 3,005 respondents took part in the cross-sectional survey, including 2,276 respondents in the community sample, 357 in the clinic sample and 372 in the Internet sample. 40 in-depth qualitative interviews were undertaken with a range of individuals, as determined by the interview quota matrix. Discussion The SALLEE project has benefited from using quantitative research to provide generalisable data on a range of variables and qualitative research to add in-depth understanding and interpretation. The social mapping exercise successfully located a large number

  9. Investigating public space exploration support in the UK

    Science.gov (United States)

    Entradas, Marta; Miller, Steve

    2010-10-01

    Space agencies such as NASA and ESA have ambitious long-term programmes that mark the beginning of a new era in space exploration where humans will land on Mars; an era requiring public support and, therefore, more consideration for public opinion. Empirical research shows that there are substantial differences in the level of understanding of space exploration among the general public. Studying audiences appears to be crucial to inform public engagement and communication strategies as well as policy debate. This paper presents the results of a survey conducted in the UK in 2008 at two science outreach events, the Royal Society Exhibition in London and the National Space Centre in Leicester, to investigate the motivations, beliefs, political preferences and attitudes towards space exploration of this audience. A sample of 744 respondents was collected. The analysis shows that the British public who come to outreach and engagement activities support space exploration but have some reservations about considering the advancement of UK space activities to be of national interest. Yet, when asked about means of exploring space, the majority agrees that space should be explored using both mankind and machines, ranking "generating new scientific knowledge and advancing human culture" as the most important reason for continuing investment in space research. Although the greater number of supporters says that more than the current government funding should be allocated to civil space activities, concerns about risk and value appear to influence this view.

  10. Rock and mineral physics at University College London

    Science.gov (United States)

    Dennis, Paul; Meredith, Philip; Price, David

    The Department of Geological Sciences at University College London (UCL), has undergone a period of major expansion and growth as a result of the restructuring of geology departments within the University of London that was carried out in 1982. This exercise produced the amalgamation of selected parts of the Department of Geological Sciences of Queen Mary College and the Department of Geology, UCL, on the UCL site. The creation of this strengthened grouping has been successful in attracting a significant number of active researchers in the field of rock and mineral physics (RMP) to the new UCL department. As a result, the academic staff has more than douhled since 1982 and now stands at 31.

  11. A mathematical model of the London riots and their policing.

    Science.gov (United States)

    Davies, Toby P; Fry, Hannah M; Wilson, Alan G; Bishop, Steven R

    2013-01-01

    In August 2011, several areas of London experienced episodes of large-scale disorder, comprising looting, rioting and violence. Much subsequent discourse has questioned the adequacy of the police response, in terms of the resources available and strategies used. In this article, we present a mathematical model of the spatial development of the disorder, which can be used to examine the effect of varying policing arrangements. The model is capable of simulating the general emergent patterns of the events and focusses on three fundamental aspects: the apparently-contagious nature of participation; the distances travelled to riot locations; and the deterrent effect of policing. We demonstrate that the spatial configuration of London places some areas at naturally higher risk than others, highlighting the importance of spatial considerations when planning for such events. We also investigate the consequences of varying police numbers and reaction time, which has the potential to guide policy in this area.

  12. Intussusception and the great smog of London, December 1952.

    Science.gov (United States)

    Black, J

    2003-12-01

    To discuss the possible significance of the increased incidence of intussusception in children in relation to the "Great Smog" of London in December 1952. Cases of intussusception were recorded in two hospitals in East London for the years 1951, 1952, 1953, and 1954. For 1952 the actual dates of admission were recorded. During the year 1952 the total number of cases of intussusception greatly exceeded that in the previous and succeeding years. Immediately during and after the fog there was a clustering of cases, which only occurred during this period. The increased incidence of cases during 1952 is thought to reflect the annual variation in incidence resulting from changes in the prevalence of viruses capable of causing intussusception. The clustering of cases in relation to the fog may reflect a facilitated entry of virus through the wall of the terminal ileum due to the effect of swallowed irritants such as sulphurous acid and smoke particles.

  13. "Mothering through Islam": Narratives of Religious Identity in London

    Directory of Open Access Journals (Sweden)

    Louise Ryan

    2013-04-01

    Full Text Available This paper draws upon research with mothers of diverse Muslim backgroundsin London to explore how these women use ‘conservative’ interpretations ofIslamic beliefs and practices to underpin their parenting strategies. In particularthe paper looks at how mothers use religion as a frame to make sense of andgive meaning to their experiences and encounters in Britain. We suggest thatthe women use Islam in four key ways: (i as a framework for teaching theirchildren right and wrong, (ii as a means of protecting children from the ‘moral’dangers of British society, (iii as an authoritative voice that reinforces parentingand (iv as a means of critiquing specific aspects of both the traditional andBritish culture in which they live and daily negotiate their different cultural andreligious belonging. In attempting to instil religious values in their London-basedchildren, these mothers have to negotiate the hostility that Islam increasinglyprovokes in British society’s public arenas.

  14. Chinese herbal medicine for treating menopausal symptoms in London women: developing a good practice protocol via the factor analysis of prescribing patterns in a clinical study.

    Science.gov (United States)

    Scheid, Volker; Tuffrey, Veronica; Bovey, Mark

    2017-06-01

    The objective of the study described in this paper was to define Chinese medicine formula patterns for the treatment of menopausal women in London. These formula patterns are intended to inform the development of best practice guidelines for a future pragmatic randomised controlled trial, with the ultimate goal of evaluating the possibility of integrating Chinese medicine treatment strategies for menopausal symptoms into the UK National Health Service. Data from a clinical study that had demonstrated the effectiveness and safety of Chinese medicine in treating 117 perimenopausal women at the Westminster University Polyclinic in London were analysed for symptom occurrence and herb use. The frequency of occurrence of different presenting symptoms and the frequency of use of individual herbs is described, the patterns of combined herb use were analysed by means of factor analysis, and the correlations between these patterns and the presenting symptoms were analysed using the chi square test. Treating the emergent use patterns as Chinese herbal medicine formulas, five distinctive formula patterns emerged in the course of this study. While there is some overlap between these formulas and their associated symptom patterns and those described in Chinese medicine textbooks and guidelines, some formula patterns appear to be unique to London women. This indicates that best practice guidelines for the Chinese medicine treatment of menopausal symptoms, which have been shown to vary cross-culturally, need to be derived from local clinical practice. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. UK businesses bag innovation awards

    Science.gov (United States)

    Banks, Michael

    2015-09-01

    Five UK firms have received innovation awards from the Institute of Physics (IOP), which publishes Physics World. Hallmarq Veterinary Imaging, Metrasens, M Squared Lasers, Silixa and Tracerco have all won an IOP award for developing new innovative products.

  16. UK science, post-Brexit

    National Research Council Canada - National Science Library

    James Wilsdon

    2017-01-01

    Nine months since the British vote to exit the European Union ("Brexit"), the UK science community's initial dismay has given way to hard-boiled determination to limit the damage it will do to universities and research...

  17. UK Punched Card Reference Manuals

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Documentation for using and reading punched cards kept at the UK Met Office. Includes five Marine and one upper air manual, dated from 1953-1981.

  18. "UK today" Tallinnas / Tuuli Oder

    Index Scriptorium Estoniae

    Oder, Tuuli, 1958-

    2001-01-01

    Vabariikliku inglise keele olümpiaadi raames toimus Tallinnas viktoriini "UK today" lõppvoor. Osalesid 22 kooli kaheliikmelised võistkonnad. Viktoriini tulemused koolide lõikes ja küsimused õigete vastustega

  19. IEEE802.15.4协议性能分析实验设计与实现%Experimental Design and Implementation of IEEE 802.15.4 Protocol Performance Analysis

    Institute of Scientific and Technical Information of China (English)

    欧阳国军; 赵艳玲

    2016-01-01

    为了探索IEEE802.15.4协议实验教学,首先对实验内容进行了归纳,然后应用IEEE802.15.4/ZigBee仿真模型设计了IEEE802.15.4协议性能分析实验方案,详细给出IEEE802.15.4/ZigBee仿真模型的参数配置,最后分析了参数SO、BO、NB、BE和负载对网络性能的影响.该实验方案应用到教学中,加强了学生对抽象、复杂知识的理解,填补了IEEE802.15.4协议教学中的一项空白.

  20. Intergenerational learning between children and grandparents in East London

    OpenAIRE

    Kenner, Charmian; Gregory, Eve E.; Jessel, John; Ruby, Mahera; Arju, Tahera

    2004-01-01

    The study set out to investigate learning events taking place between young children and grandparents in London's East End, both in activities where older people have traditionally provided support (such as storytelling) and in the newer areas of information and communication technology where children have competences which their grandparents would like to access. This area of family learning is growing in significance as grandparents are increasingly taking on a childcare role in different e...

  1. Has UK energy policy failed

    Energy Technology Data Exchange (ETDEWEB)

    Parker, M.J. (Sussex University, Brighton (United Kingdom). Science Policy Research Unit)

    1993-01-01

    The coal crisis of last October focused attention on the UK's energy supplies and led many to criticise the government's energy policy. Are these criticisms justified Was the crisis a massive policy failure An Honorary Fellow at the Science Policy Research Unit at Sussex University and formerly Director of Economics at British Coal, assesses UK energy policy and highlights some of the outstanding issues. 1 tab.

  2. Enhancing Resilience of London by Learning from Experiences

    Directory of Open Access Journals (Sweden)

    Funda Atun

    2012-07-01

    Full Text Available The concept of resilience was introduced at the beginning of the 70s to indicate the capability of natural systems to absorb perturbations, preserving their structure and keeping the system functioning. The paper considers London as an example to a resilient city by focusing on some remarkable disasters in the history of London, such as the Great Fire of 1666, the air raids during the World War 2, 18 December 1987 Kings Cross Fire, terrorist attack to tube network on the 7th of July 2005, 1928 flooding and 1953 storm surge. The paper starts by giving short descriptions of these disasters and continues by discussing the lessons learned. In this paper, the concept of resilience has been studied in three phases: prepare for, respond to and recover from a disaster. Besides, actions that have to be taken according to these three phases are going to be explored in detail. In conclusion, the notable effects of the mentioned disasters on the structural and non-structural tools for disaster prevention have been revealed by considering resilience of London.

  3. Channel Resource Allocation for VoIP Applications in Collaborative IEEE 802.11/802.16 Networks

    Directory of Open Access Journals (Sweden)

    Foh ChuanHeng

    2010-01-01

    Full Text Available Collaborations between the IEEE 802.11 and the IEEE 802.16 networks operating in a common spectrum offers dynamic allocate bandwidth resources to achieve improved performance for network applications. This paper studies the bandwidth resource allocation of collaborative IEEE 802.11 and IEEE 802.16 networks. Consider delivering data packets between mobile stations and Internet users through an access point (AP of the IEEE 802.11 network and a base station (BS of the IEEE 802.16 network operating on a common frequency band, we analyze their medium access control (MAC protocols, frame structures, and design a cooperation mechanism for the IEEE 802.11 and the IEEE 802.16 networks to share the same medium with adaptive resource allocation. Based on the mechanism, an optimized resource allocation scheme is proposed for VoIP applications. An analytical model is developed for the study to show significant improvements in voice capacity for our optimized resource allocation scheme.

  4. Comparison of QoS guarantee techniques for VoIP over IEEE802.11 wireless LAN

    Science.gov (United States)

    Guo, Fanglu; Chiueh, Tzi-cker

    2008-01-01

    An emerging killer application for enterprise wireless LANs (WLANs) is voice over IP (VoIP) telephony, which promises to greatly improve the reachability and mobility of enterprise telephony service at low cost. None of the commercial IEEE 802.11 WLAN-based VoIP products can support more than ten G.729-quality voice conversations over a single IEEE 802.11b channel on real-world WLANs, even though the physical transmission rate is more than two orders of magnitude higher than an individual VoIP connection's bandwidth requirement. There are two main reasons why these VoIP systems' effective throughput is significantly lower than expected: VoIP's stringent latency requirement and substantial per-WLAN-packet overhead. Time-Division Multiple Access (TDMA) is a well-known technique that provides per-connection QoS guarantee as well as improves the radio channel utilization efficiency. This paper compares the effective throughput of IEEE 802.11, IEEE 802.11e and a software-based TDMA (STDMA) protocol that is specifically designed to support WLAN-based VoIP applications, on the same commodity IEEE 802.11 WLAN hardware. Empirical measurements from a VOIP over WLAN testbed show that the numbers of G.729-quality voice conversations that IEEE 802.11, IEEE 802.11e and STDMA can support over a single IEEE 802.11b channel are 18, 22 and 50, respectively.

  5. Evolving Pb isotope signatures of London airborne particulate matter (PM 10)-constraints from on-filter and solution-mode MC-ICP-MS.

    Science.gov (United States)

    Noble, Stephen R; Horstwood, Matthew S A; Davy, Pamela; Pashley, Vanessa; Spiro, Baruch; Smith, Steve

    2008-07-01

    Pb isotope compositions of biologically significant PM(10) atmospheric particulates from a busy roadside location in London UK were measured using solution- and laser ablation-mode MC-ICP-MS. The solution-mode data for PM(10) sampled between 1998-2001 document a dramatic shift to increasingly radiogenic compositions as leaded petrol was phased out. LA-MC-ICP-MS isotope analysis, piloted on a subset of the available samples, is shown to be a potential reconnaissance analytical technique. PM(10) particles trapped on quartz filters were liberated from the filter surface, without ablating the filter substrate, using a 266 nm UV laser and a dynamic, large diameter, low-fluence ablation protocol. The Pb isotope evolution noted in the London data set obtained by both analytical protocols is similar to that observed elsewhere in Western Europe following leaded petrol elimination. The data therefore provide important baseline isotope composition information useful for continued UK atmospheric monitoring through the early 21(st) century.

  6. London 2012: espacio de excepción London 2012: espaço de exceção;London 2012: space of exception

    Directory of Open Access Journals (Sweden)

    Isaac Marrero-Guillamón

    2011-12-01

    Full Text Available La teoría del estado de excepción de Giorgio Agamben, según la cual, lejos de ser una medida provisional y extraordinaria, éste habría devenido una técnica de gobierno, puede ayudar a entender la configuración legal y espacial de los Juegos Olímpicos. Este texto analiza los documentos fundamentales de la arquitectura legal de London 2012 con el fin de mostrar su impacto en la regulación y vigilancia del espacio económico y político de la ciudad. Tras presentar los pilares fundamentales de la gobernanza olímpica, el texto se centra en la configuración jurídica de la excepcionalidad. A través de un sistema de legitimación basado en la necesidad y la amenaza, la normativa asociada a los Juegos aprobada por el Gobierno Británico logra efectivamente materializar un estado de excepción: una suerte de paraíso capitalista, en el que la actividad económica está regulada por contratos exclusivos, toda actividad política está criminalizada, y los privilegios son protegidos policial y militarmente. De aquí que London 2012 pueda ser calificado como un “espacio de excepción”.

  7. Evaluation of the Effects of Hidden Node Problems in IEEE 802.15.7 Uplink Performance

    Directory of Open Access Journals (Sweden)

    Carlos Ley-Bosch

    2016-02-01

    Full Text Available In the last few years, the increasing use of LEDs in illumination systems has been conducted due to the emergence of Visible Light Communication (VLC technologies, in which data communication is performed by transmitting through the visible band of the electromagnetic spectrum. In 2011, the Institute of Electrical and Electronics Engineers (IEEE published the IEEE 802.15.7 standard for Wireless Personal Area Networks based on VLC. Due to limitations in the coverage of the transmitted signal, wireless networks can suffer from the hidden node problems, when there are nodes in the network whose transmissions are not detected by other nodes. This problem can cause an important degradation in communications when they are made by means of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA access control method, which is used in IEEE 802.15.7 This research work evaluates the effects of the hidden node problem in the performance of the IEEE 802.15.7 standard We implement a simulator and analyze VLC performance in terms of parameters like end-to-end goodput and message loss rate. As part of this research work, a solution to the hidden node problem is proposed, based on the use of idle patterns defined in the standard. Idle patterns are sent by the network coordinator node to communicate to the other nodes that there is an ongoing transmission. The validity of the proposed solution is demonstrated with simulation results.

  8. Performance Analysis of Non-saturated IEEE 802.11 DCF Networks

    Science.gov (United States)

    Zhai, Linbo; Zhang, Xiaomin; Xie, Gang

    This letter presents a model with queueing theory to analyze the performance of non-saturated IEEE 802.11 DCF networks. We use the closed queueing network model and derive an approximate representation of throughput which can reveal the relationship between the throughput and the total offered load under finite traffic load conditions. The accuracy of the model is verified by extensive simulations.

  9. Evaluation of H.264/AVC over IEEE 802.11p vehicular networks

    Science.gov (United States)

    Rozas-Ramallal, Ismael; Fernández-Caramés, Tiago M.; Dapena, Adriana; García-Naya, José Antonio

    2013-12-01

    The capacity of vehicular networks to offer non-safety services, like infotainment applications or the exchange of multimedia information between vehicles, have attracted a great deal of attention to the field of Intelligent Transport Systems (ITS). In particular, in this article we focus our attention on IEEE 802.11p which defines enhancements to IEEE 802.11 required to support ITS applications. We present an FPGA-based testbed developed to evaluate H.264/AVC (Advanced Video Coding) video transmission over vehicular networks. The testbed covers some of the most common situations in vehicle-to-vehicle and roadside-to-vehicle communications and it is highly flexible, allowing the performance evaluation of different vehicular standard configurations. We also show several experimental results to illustrate the quality obtained when H.264/AVC encoded video is transmitted over IEEE 802.11p networks. The quality is measured considering two important parameters: the percentage of recovered group of pictures and the frame quality. In order to improve performance, we propose to substitute the convolutional channel encoder used in IEEE 802.11p for a low-density parity-check code encoder. In addition, we suggest a simple strategy to decide the optimum number of iterations needed to decode each packet received.

  10. IEEE 802.11 Wireless LANs: Performance Analysis and Protocol Refinement

    Directory of Open Access Journals (Sweden)

    Chatzimisios P.

    2005-01-01

    Full Text Available The IEEE 802.11 protocol is emerging as a widely used standard and has become the most mature technology for wireless local area networks (WLANs. In this paper, we focus on the tuning of the IEEE 802.11 protocol parameters taking into consideration, in addition to throughput efficiency, performance metrics such as the average packet delay, the probability of a packet being discarded when it reaches the maximum retransmission limit, the average time to drop a packet, and the packet interarrival time. We present an analysis, which has been validated by simulation that is based on a Markov chain model commonly used in the literature. We further study the improvement on these performance metrics by employing suitable protocol parameters according to the specific communication needs of the IEEE 802.11 protocol for both basic access and RTS/CTS access schemes. We show that the use of a higher initial contention window size does not considerably degrade performance in small networks and performs significantly better in any other scenario. Moreover, we conclude that the combination of a lower maximum contention window size and a higher retry limit considerably improves performance. Results indicate that the appropriate adjustment of the protocol parameters enhances performance and improves the services that the IEEE 802.11 protocol provides to various communication applications.

  11. Performance characterization of the IEEE 802.11 signal transmission over a multimode fiber PON

    Science.gov (United States)

    Maksymiuk, L.; Siuzdak, J.

    2014-11-01

    In this paper there are presented measurements concerning performance analysis of the IEEE 802.11 signal distribution over multimode fiber based passive optical network. In the paper there are addressed three main sources of impairments: modal noise, frequency response fluctuation of the multimode fiber and non-linear distortion of the signal in the receiver.

  12. Some problems of implementation: ANSI/IEEE Std 1149.1 in microcontroller design

    Science.gov (United States)

    Adamkiewicz, Hubert; Glinski, Krzysztof; Lewandowski, Artur

    1992-08-01

    The paper presents some problems of implementation ANSI/IEEE Std 1149.1 worked out in the Industrial Institute of Electronics (PIE) microcontroller board. Diagnostic properties of some special hardware solutions and examples of testing procedures are described. Testing was performed with the help of the PIE diagnostic bus analyzer.

  13. Interference Measurements in IEEE 802.11 Communication Links Due to Different Types of Interference Sources

    NARCIS (Netherlands)

    Bloem, van Jan-Willem; Schiphorst, Roel; Kluwer, Taco; Slump, Cornelis H.

    2012-01-01

    The number of wireless devices (smartphones, laptops, sensors) that use the 2.4 GHz ISM band is rapidly increasing. The most common communication system in this band is Wi-Fi (IEEE 802.11b/g/n). For that reason coexistence between Wi-Fi and other systems becomes more and more important. In this pape

  14. Analysis of the IEEE 802.20 norm as the standard for developing new wireless technologies

    Directory of Open Access Journals (Sweden)

    Danilo A López Sarmiento

    2015-10-01

    Full Text Available This paper aims to compile existing information on the IEEE 802.20 standard and unify it in a document that will serve as support for parties interested in conducting research and / or projects related to wireless technologies.

  15. Interference Mitigation in IEEE 802.15.4-A Cluster Based Scheduling Approach

    Directory of Open Access Journals (Sweden)

    G. M. Tamilselvan

    2011-01-01

    Full Text Available Problem statement: In universal networking environments; two or more heterogeneous communication systems coexisting in a single place. Especially, Wireless Local Area Networks (WLANs based on IEEE 802.11b specifications and Wireless Personal Area Networks (WPANs based on IEEE 802.15.4 specifications need to coexist in the same Industrial, Science and Medial (ISM band. If the WPAN communication coverage is expanded using a cluster-tree network topology, then the 802.15.4 network is more susceptible to interference from neighboring WLANs. Approach: In this study, we propose an adaptive transmission power aware cluster scheduling algorithm using multiple channels in a WPAN in the presence of WLAN interference. Results: The algorithm includes node identification, channel allocation, clustering and time scheduling. To evaluate the performance of the proposed algorithm, the performance metrics such as Bit error, Packet Error Rate (PER, Throughput, Average End-End Delay and Average Jitter is measured through Qualnet simulation. PER is calculated from bit error rate. The simulation results are compared with the conventional TDMA scheme. Conclusion/Recommendations: The measurement result shows that the proposed algorithm is effective in an IEEE 802.15.4 cluster-tree network in the presence of multiple IEEE 802.11 interferers.

  16. Performance Evaluations for IEEE 802.15.4-based IoT Smart Home Solution

    Directory of Open Access Journals (Sweden)

    Nga Dinh

    2016-09-01

    Full Text Available The Internet of Things (IoT is going to be a market-changing force for a variety of real-time applications such as e-healthcare, home automation, environmental monitoring, and industrial automation. Low power wireless communication protocols offering long lifetime and high reliability such as the IEEE 802.15.4 standard have been a key enabling technology for IoT deployments and are deployed for home automation recently. The issues of the IEEE 802.15.4 networks have moved from theory to real world deployments. The work presented herein intends to demonstrate the use of the IEEE 802.15.4 standard in recent IoT commercial products for smart home applications: the Smart Home Starter Kit. The contributions of the paper are twofold. First, the paper presents how the IEEE 802.15.4 standard is employed in Smart Home Starter Kit. In particular, network topology, network operations, and data transfer mode are investigated. Second, network performance metrics such as end-to-end (E2E delay and frame reception ratio (FRR are evaluated by experiments. In addition, the paper discusses several directions for future improvements of home automation commercial products.

  17. Analyzing Performance for Mutual Authentication Mechanism for Wimax: IEEE 802.16e

    Directory of Open Access Journals (Sweden)

    Mrs. R. C. Roychaudhary

    2014-02-01

    Full Text Available The IEEE 802.16 designed to operate in the 10-66 GHz spectrum and it specifies the physical layer (PHY and medium access control layer (MAC of the air interface BWA systems. At 10-66 GHz range, transmission requires Line-of-Sight (LOS. IEEE 802.16 is working group number 16 of IEEE 802, specializing in point-tomultipoint broadband wireless access. The IEEE 802.16 Working Group created a new standard, commonly known as WiMAX, for broadband wireless access at high speed and low cost, which is easy to deploy, and which provides a scalable solution for extension of a fiber-optic backbone. WiMAX base stations can offer greater wireless coverage of about 5 miles, with LOS (line of sight transmission within bandwidth of up to 70 Mbps. WiMAX operates on the same general principles as WiFi -- it sends data from one computer to another via radio signals. A computer (either a desktop or a laptop equipped with WiMAX would receive data from the WiMAX transmitting station, probably using encrypted data keys to prevent unauthorized users from stealing access. The fastest WiFi connection can transmit up to 54 megabits per second under optimal conditions. WiMAX should be able to handle up to 70 megabits per second.

  18. Implementation of IEEE 802.15.4a Based UWB Systems for Coexistence with Primary Users

    Directory of Open Access Journals (Sweden)

    Caglar Findikli

    2016-03-01

    Full Text Available Peaceful coexistence is a major implementation issuefor both cognitive radios and ultra wideband (UWB systems.Accordingly, the UWB impulse radio (UWB-IR based WirelessPersonal Area Network (WPAN standard IEEE 802.15.4a hassuggested using linear combination of pulse to limit interfer-ence to coexisting primary systems. In this paper, motivatedby implementing the IEEE 802.15.4a based UWB-IR systemsfor peaceful coexistence, we consider the implementation oflinear combination of pulses as suggested by the standard.Accordingly, we (i design possible linearly combined pulses thatconform to the standard requirements, (ii consider coherentand noncoherent receiver structures that can be adapted for thephysical layer of the IEEE 802.15.4a standard, (iii investigatethe effect of channel models on the system performance, and(iv study the UWB-IR system performance in the presenceof narrowband and orthogonal frequency division multiplexing(OFDM based wideband primary systems with various band-widths and subcarriers. The study shows that the UWB-IR systemperformance can be significantly improved by selecting suitablepulses for transmission and employing appropriate filteringtechniques at the receiver when the primary system is active.For the implementation of IEEE 802.15.4a based UWB systemscomplying with coexistence requirements, the results of this studyshould be carefully considered.

  19. IEEE Radio and Wireless Symposium Student Awards Support Request: 2010-2012

    Science.gov (United States)

    2012-01-01

    Trasser, Sebastien Chartier , Hermann Schumacher. Analog Synchronous Receiver for Multi-Gigabit Wireless Communications, IEEE Radio and Wireless...Receiver for Multi-Gigabit Wireless Communications Cagri Ulusoy*, Gang Liu*, Andreas Trasser*, S´ebastien Chartier # and Hermann Schumacher* Ulm University

  20. Analysis and design of an on-chip retargeting engine for IEEE 1687 networks

    NARCIS (Netherlands)

    Ibrahim, Ahmed; Kerkhoff, Hans G.

    2016-01-01

    IEEE 1687 (iJTAG) standard introduces a methodology for accessing the increasing number of embedded instruments found in modern System-on-Chips. Retargeting is defined by iJTAG as the procedure of translating instrument-level patterns to system-level scan vectors for a certain network organization.

  1. Analysis of Throughput GTS and SDS in IEEE 802.15.4

    Directory of Open Access Journals (Sweden)

    Abhinav Singh

    2012-03-01

    Full Text Available the current IEEE 802.15.4 standard restricts the beacon enabled approach to star networks, while they support multi-hop networking in mesh but with no synchronization. In this paper there is proposal of a GTS with superframe scheduling for the chain network and throughput is observed.

  2. Performance Modeling of a Bottleneck Node in an IEEE 802.11 Ad-hoc Network

    NARCIS (Netherlands)

    Berg, van den Hans; Roijers, Frank; Mandjes, Michel R.H.; Kunz, T.; Ravi, S.S.

    2006-01-01

    The IEEE 802.11 MAC protocol, often used in ad-hoc networks, has the tendency to share the capacity equally amongst the active nodes, irrespective of their loads. An inherent drawback of this fair-sharing policy is that a node that serves as a relay-node for multiple flows is likely to become a bott

  3. Performance modelieg of a bottleneck node in an IEEE 802.11 ad-hoc network

    NARCIS (Netherlands)

    Berg, J.L. van den; Mandjes, M.; Roijers, F.

    2006-01-01

    The IEEE 802.11 MAC-protocol, often used in ad-hoc networks, has the tendency to share the capacity equally amongst the active nodes, irrespective of their loads. An inherent drawback of this fair-sharing policy is that a node that serves as a relay-node for multiple flows is likely to become a bott

  4. A Carrier Synchronization Algorithm for IEEE 802.11a System

    Institute of Scientific and Technical Information of China (English)

    WANG Chun-guang; ZHOU Zheng

    2004-01-01

    A new Carrier Frequency Offset (CFO) estimation algorithm for IEEE 80211a system is proposed. The extended Kalman filter (EKF) is applied to estimate the frequency offset in the acquisition stage and the cyclic prefix (CP) is used to correct the residual CFO in the tracking stage. Simulation results demonstrate the super performance of the proposed algorithm compared to Maximum-Likelihood (ML) approach.

  5. IEEE802.15.6 -based multi-accelerometer WBAN system for monitoring Parkinson's disease.

    Science.gov (United States)

    Keränen, Niina; Särestöniemi, Mariella; Partala, Juha; Hämäläinen, Matti; Reponen, Jarmo; Seppänen, Tapio; Iinatti, Jari; Jämsä, Timo

    2013-01-01

    In this paper we present a detailed example of a wireless body area network (WBAN) scenario utilizing the recent IEEE802.15.6 standard as applied to a multi-accelerometer system for monitoring Parkinson's disease and fall detection. Ultra wideband physical layer and standard security protocols are applied to meet application requirements for data rate and security.

  6. Adaptability of IEEE 802.15.4(Zigbee Protocol for Wireless Sensor network

    Directory of Open Access Journals (Sweden)

    Lalit Saraswat

    2010-05-01

    Full Text Available The IEEE 802.15.4/Zigbee protocol stack has been considered as a promising technology for Wireless Sensor Networks (WSN. IEEE 802.15.4 Low-Rate Wireless Personal Area Network (WPAN standardspecifies the lower protocol layers—the physical layer (PHY, and the media access control (MAC portion of the data link layer (DLL and Network layer(NWK Wireless sensor network provide the low rate, wireless interconnection of ultra low cost sensor/actuator devices to enable the cyber world to sense and affect the real physical environment. The IEEE 802.15.4/Zigbee protocol stack provide selectable levels of security using AES-128 mechanism for privacy, sender authentication, message integrity. It uses fully handshake protocol for transfer reliability. In business applications where WSN are applied, failures in essential parts of the sensor network must beefficiently detected and automatically recovered. ZigBee is targeted at radio-frequency (RF applications that require a low data rate, long battery life, and secure networking.This paper will analyze theadaptability features of IEEE802.15.4[3] at Physical, MAC and Network layer and various mode of operation at MAC layer.

  7. A Secure Simplification of the PKMv2 Protocol in IEEE 802.16e-2005

    DEFF Research Database (Denmark)

    Yuksel, Ender; Nielson, Hanne Riis; Nielsen, Christoffer Rosenkilde

    2007-01-01

    for IEEE 802.16e, PKMv2. This protocol seems to have an exaggerated mixture of security features. Thus, we iteratively investigate which components are necessary for upholding the security properties and which can be omitted safely. This approach is based on the LySa process calculus and employs...

  8. Adaptive Radio Resource Allocation in Hierarchical QoS Scheduling for IEEE 802.16 Systems

    DEFF Research Database (Denmark)

    Wang, Hua; Dittmann, Lars

    2007-01-01

    Future mobile communication systems such as IEEE 802.16 are expected to deliver a variety of multimedia services with diverse QoS requirements. To guarantee the QoS provision, appropriate scheduler architecture and scheduling algorithms have to be carefully designed. In this paper, we propose...

  9. Computer Controlled Test Systems. Introduction. A Course Based on the IEEE 488 Bus.

    Science.gov (United States)

    Herrmann, Eric J.

    An introductory course in computer automated tests and measurement systems based on the International Test Instrument-Computer Interface Standard, the IEEE (Institute of Electrical and Electronics Engineers)-488, is presented in this study guide. This course is designed to: (1) introduce the electronics engineering technician to the functional…

  10. Energy optimization based path selection algorithm for IEEE 802.11s wireless mesh networks

    CSIR Research Space (South Africa)

    Mhlanga, MM

    2011-09-01

    Full Text Available when the network is deployed in rural areas where electricity is a scarce resource. This research therefore presents an energy optimization based path selection algorithm for IEEE 802.11s WMNs which is aimed at addressing the above mentioned constrains...

  11. Evaluation of the Effects of Hidden Node Problems in IEEE 802.15.7 Uplink Performance.

    Science.gov (United States)

    Ley-Bosch, Carlos; Alonso-González, Itziar; Sánchez-Rodríguez, David; Ramírez-Casañas, Carlos

    2016-02-06

    In the last few years, the increasing use of LEDs in illumination systems has been conducted due to the emergence of Visible Light Communication (VLC) technologies, in which data communication is performed by transmitting through the visible band of the electromagnetic spectrum. In 2011, the Institute of Electrical and Electronics Engineers (IEEE) published the IEEE 802.15.7 standard for Wireless Personal Area Networks based on VLC. Due to limitations in the coverage of the transmitted signal, wireless networks can suffer from the hidden node problems, when there are nodes in the network whose transmissions are not detected by other nodes. This problem can cause an important degradation in communications when they are made by means of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) access control method, which is used in IEEE 802.15.7 This research work evaluates the effects of the hidden node problem in the performance of the IEEE 802.15.7 standard We implement a simulator and analyze VLC performance in terms of parameters like end-to-end goodput and message loss rate. As part of this research work, a solution to the hidden node problem is proposed, based on the use of idle patterns defined in the standard. Idle patterns are sent by the network coordinator node to communicate to the other nodes that there is an ongoing transmission. The validity of the proposed solution is demonstrated with simulation results.

  12. Energy-aware path selection metric for IEEE 802.11s wireless mesh networking

    CSIR Research Space (South Africa)

    Mhlanga, MM

    2009-01-01

    Full Text Available The IEEE 802.11s working group has commenced activities, which would lead to the development of a standard for wireless mesh networks (WMNs). The draft of 802.11s introduces a new path selection metric called airtime link metric. However...

  13. The IEEE-SA patent policy update under the lens of EU competition law

    NARCIS (Netherlands)

    Kanevskaia, Olia; Zingales, Nicolo

    2016-01-01

    In 2015, the Institute of Electrical and Electronics Engineers (IEEE) Standardization Association made some controversial changes to its patent policy. The changes include a recommended method of calculation of FRAND royalty rates, and a request to members holding a standard-essential patent to fore

  14. The IEEE-SA patent policy update under the lens of EU competition law

    NARCIS (Netherlands)

    Kanevskaia, Olia; Zingales, Nicolo

    2016-01-01

    In 2015, the Institute of Electrical and Electronics Engineers (IEEE) Standardization Association made some controversial changes to its patent policy. The changes include a recommended method of calculation of FRAND royalty rates, and a request to members holding a standard essential patent (SEP) t

  15. A Secure Simplification of the PKMv2 Protocol in IEEE 802.16e-2005

    DEFF Research Database (Denmark)

    Yuksel, Ender; Nielson, Hanne Riis; Nielsen, Christoffer Rosenkilde

    2007-01-01

    for IEEE 802.16e, PKMv2. This protocol seems to have an exaggerated mixture of security features. Thus, we iteratively investigate which components are necessary for upholding the security properties and which can be omitted safely. This approach is based on the LySa process calculus and employs...

  16. Computer Controlled Test Systems. Introduction. A Course Based on the IEEE 488 Bus.

    Science.gov (United States)

    Herrmann, Eric J.

    An introductory course in computer automated tests and measurement systems based on the International Test Instrument-Computer Interface Standard, the IEEE (Institute of Electrical and Electronics Engineers)-488, is presented in this study guide. This course is designed to: (1) introduce the electronics engineering technician to the functional…

  17. Discrimination and common mental disorder among migrant and ethnic groups: findings from a South East London Community sample.

    Science.gov (United States)

    Hatch, S L; Gazard, B; Williams, D R; Frissa, S; Goodwin, L; Hotopf, M

    2016-05-01

    Few studies have examined discrimination and mental health in the UK, particularly by migrant status and in urban contexts with greater demographic diversity. This study aims to (1) describe the prevalence of discrimination experiences across multiple life domains; (2) to describe associations between discrimination experiences and common mental disorder (CMD); (3) to determine whether or not the relationship between discrimination and CMD varies by migrant status and ethnicity. Data on major, anticipated and everyday discrimination and CMD symptoms were collected from an ethnically diverse prospective sample of 1052 participants followed up from 2008 to 2013 in the South East London Community Health study, a population-based household survey. With few exceptions, discrimination was most prevalent among those in the Black Caribbean group. However, those in the White Other ethnic group had similar or greater reporting major and anticipated discrimination to Black or mixed ethnic minority groups. The effects of discrimination on CMD were most pronounced for individuals who had recently migrated to the UK, an ethnically heterogeneous group, and for Black and Mixed ethnic minority groups in partially adjusted models. Prior CMD accounted for differences between the Mixed and White British ethnic groups, but the strength of the association for the most recent migrant group and the Black ethnic groups remained two or more times greater than the reference groups. The strength of the relationship suggests a need for more consideration of migration status along with ethnicity in examining the impact of discrimination on mental disorder in community and clinical samples.

  18. E-Tendering Process Within Construction: A UK Perspective

    Institute of Scientific and Technical Information of China (English)

    Geoff Tindsley; Paul Stephenson

    2008-01-01

    E-tendering can be defined as the issue and receipt of tender documentation through electronic means which facilitates the procurement of construction work and the award of contracts. The current paper-based method of tendering has been commonplace within the industry for a significant number of years, but with recent technological advancements, this traditional process is rapidly becoming outdated. Several ma-jor projects within the UK are now being procured through the e-tendering process which includes the multi-billion pound development for the Olympic Games in London 2012. However, while these prestigious pro-jects are embracing e-tendering technology, it is not certain as to what extent e-tendering is used across the construction sector generally. This research is primarily concemed with establishing the current status, prac-ticalities and resource effectiveness of e-tendering within UK construction. Results are provided from an in-dustry survey which includes both quantitative and qualitative data. A case study implementation is also in-cluded which assesses the utilisation of e-tendering software in practice. The research findings indicated that e-tendering can provide substantial resource savings to a major part of the supply chain, with the key benefits being enhanced communication, time savings and reduced costs. However, a considerable propor-tion of the industry remains uncertain about embracing new technologies, with reluctance to change being perceived as the greatest barrier. The findings suggest that many professionals within the UK construction industry recognise a requirement for increased implementation of e-tendering, but feel that training, educa-tion and support from senior management are essential requirements for e-tendering to become widely ac-cepted in the future.

  19. IEEE 802.11ac sebagai Standar Pertama untuk Gigabit Wireless LAN

    Directory of Open Access Journals (Sweden)

    Afdhal Afdhal

    2014-04-01

    Full Text Available WLAN is a technology that currently has been used widely. This technology is considered as a data transferring media technology within the LAN/MAN. To ensure that WLAN technology can be used widely in the whole world, the IEEE has set a standard known as 802.11 to be an international standard for the WLAN technology. This standard was appeared in 1997, and has been revised and improved for several times. This improvement is done to anticipate the rapidly grown WLAN market as well as to keep this technology remains effective, efficient, and reliable at any time. At the beginning of 2014, the IEEE has set 802.11ac-2013 as a new standard for WLANs that operate below 6 GHz to achieve a data rate for up to 7 Gbps. The purpose of this article is to describe comprehensively the IEEE 802.11ac standard as a result of recent changes to the regulatory for WLAN technology which is known as the first standard issued by the IEEE for the gigabit WLANs. This article discusses the goals and objectives to be achieved by 802.11ac standard as well as the parts that have been enhanced significantly both in its PHY and MAC layers. This article will also contrast the differences between the 802.11ac standard and previous WLAN standards. Finally it will also explain the level of compatibility and interoperability of 802.11ac standards with some of previous WLAN standard.Keywords: IEEE, 802.11, 802.11ac, Gigabit WLAN

  20. IEEE 802.16J-Relay Fortified Aeromacs Networks; Benefits and Challenges

    Science.gov (United States)

    Kamali, Behnam; Apaza, Rafael D.

    2014-01-01

    Aeronautical Mobile Airport Communications System (AeroMACS) is an IEEE 802.16 standard-based (WiMAX) broadband aviation transmission technology, developed to provide safety critical communications coverage for airport surface in support of fixed and mobile ground to ground applications and services. We have previously demonstrated that IEEE 802.16j-amendment-based WiMAX is most feasible for AeroMACS applications. The principal argument in favor of application of IEEE 802.16j technology is the flexible and cost effective extension of radio coverage that is afforded by relay fortified WiMAX networks, with virtually no increase in the power requirements. In this article, following introductory remarks on airport surface communications, WiMAX and AeroMACS; the IEEE 802.16j-based WiMAX technology and multihop relay systems are briefly described. The two modes of relay operation supported by IEEE 802.16j amendment; i.e., transparent (TRS) and non-transparent (NTRS) modes, are discussed in some detail. Advantages and disadvantages of using TRS and NTRS in AeroMACS networks are summarized in a table. Practical issues vis--vis the inclusion of relays in AeroMACS networks are addressed. It is argued that the selection of relay type may affect a number of network parameters. A discussion on specific benefits and challenges of inclusion of relays in AeroMACS networks is provided. The article concludes that in case it is desired or necessary to exclusively employ one type of relay mode for all applications throughout an AeroMACS network, the proper selection would be the non-transparent mode.

  1. A versatile trigger and synchronization module with IEEE1588 capabilities and EPICS support

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, J.M., E-mail: juanmanuel.lopez@upm.e [Grupo de Investigacion en Instrumentacion y Acustica Aplicada, Universidad Politecnica de Madrid, Crta. Valencia Km-7, Madrid 28031 (Spain); Ruiz, M.; Borrego, J.; Arcas, G. de; Barrera, E. [Grupo de Investigacion en Instrumentacion y Acustica Aplicada, Universidad Politecnica de Madrid, Crta. Valencia Km-7, Madrid 28031 (Spain); Vega, J. [Asociacion EURATOM/CIEMAT para Fusion, Madrid (Spain)

    2010-07-15

    Event timing and synchronization are two key aspects to improve in the implementation of distributed data acquisition (dDAQ) systems such as the ones used in fusion experiments. It is also of great importance the integration of dDAQ in control and measurement networks. This paper analyzes the applicability of the IEEE1588 and EPICS standards to solve these problems, and presents a hardware module implementation based in both of them that allow adding these functionalities to any DAQ. The IEEE1588 standard facilitates the integration of event timing and synchronization mechanisms in distributed data acquisition systems based on IEEE 803.3 (Ethernet). An optimal implementation of such system requires the use of network interface devices which include specific hardware resources devoted to the IEE1588 functionalities. Unfortunately, this is not the approach followed in most of the large number of applications available nowadays. Therefore, most solutions are based in software and use standard hardware network interfaces. This paper presents the development of a hardware module (GI2E) with IEEE1588 capabilities which includes USB, RS232, RS485 and CAN interfaces. This permits to integrate any DAQ element that uses these interfaces in dDAQ systems in an efficient and simple way. The module has been developed with Motorola's Coldfire MCF5234 processor and National Semiconductors's PHY DP83640T, providing it with the possibility to implement the PTP protocol of IEEE1588 by hardware, and therefore increasing its performance over other implementations based in software. To facilitate the integration of the dDAQ system in control and measurement networks the module includes a basic Input/Output Controller (IOC) functionality of the Experimental Physics and Industrial Control System (EPICS) architecture. The paper discusses the implementation details of this module and presents its applications in advanced dDAQ applications in the fusion community.

  2. A versatile trigger and synchronization module with IEEE1588 capabilities and Epics support

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, J.M.; Ruiz, M.; Borrego, J.; Arcas, G. de; Barrera, E. [Universidad Politecnica de Madrid, Grupo de Investigacion en Instrumentacion y Acustica Aplicada, Madrid (Spain); Vega, J. [Asociacion EURATOM/CIEMAT para Fusion. Madrid (Spain)

    2009-07-01

    Event timing and synchronization are two key aspects to improve the implementation of distributed data acquisition (dDAQ) systems such as the ones used in fusion experiments. It is very important to integrate dDAQ in control and measurement networks. This poster analyzes the applicability of the IEEE 1588 and EPICS standards to solve these problems, and presents a hardware module implementation based in both of them that allow adding these functionalities to any DAQ. The IEEE1588 standard facilitates the integration of event timing and synchronization mechanisms in distributed data acquisition systems based on IEEE 803.3 (Ethernet). An optimal implementation of such system requires the use of network interface devices which include specific hardware resources devoted to the IEE1588 functionalities. Unfortunately, this is not the approach followed in most of the large number of applications available nowadays. Therefore, most solutions are based in software and use standard hardware network interfaces. This paper presents the development of a hardware module (GI2E) with IEEE 1588 capabilities which includes USB, RS232, RS485 and CAN interfaces. This permits the integration of any DAQ element that uses these interfaces in dDAQ systems in an efficient and simple way. The module has been developed with Motorola's Coldfire MCF5234 processor and National Semiconductors's PHY DP83640T, providing it with the possibility to implement the PTP protocol of IEEE 1588 by hardware, and therefore increasing its performance over other implementations based in software. To facilitate the integration of the dDAQ system in control and measurement networks the module includes a basic IOC (Input Output Controller) functionality of the EPICS (Experimental Physics and Industrial Control System) architecture. This document is a poster. (authors)

  3. Atmospheric ethanol in London and the potential impacts of future fuel formulations.

    Science.gov (United States)

    Dunmore, Rachel E; Whalley, Lisa K; Sherwen, Tomás; Evans, Mathew J; Heard, Dwayne E; Hopkins, James R; Lee, James D; Lewis, Alastair C; Lidster, Richard T; Rickard, Andrew R; Hamilton, Jacqueline F

    2016-07-18

    There is growing global consumption of non-fossil fuels such as ethanol made from renewable biomass. Previous studies have shown that one of the main air quality disadvantages of using ethanol blended fuels is a significant increase in the production of acetaldehyde, an unregulated and toxic pollutant. Most studies on the impacts of ethanol blended gasoline have been carried out in the US and Brazil, with much less focus on the UK and Europe. We report time resolved measurements of ethanol in London during the winter and summer of 2012. In both seasons the mean mixing ratio of ethanol was around 5 ppb, with maximum values over 30 ppb, making ethanol currently the most abundant VOC in London air. We identify a road transport related source, with 'rush-hour' peaks observed. Ethanol is strongly correlated with other road transport-related emissions, such as small aromatics and light alkanes, and has no relationship to summer biogenic emissions. To determine the impact of road transport-related ethanol emission on secondary species (i.e. acetaldehyde and ozone), we use both a chemically detailed box model (incorporating the Master Chemical Mechanism, MCM) and a global and nested regional scale chemical transport model (GEOS-Chem), on various processing time scales. Using the MCM model, only 16% of the modelled acetaldehyde was formed from ethanol oxidation. However, the model significantly underpredicts the total levels of acetaldehyde, indicating a missing primary emission source, that appears to be traffic-related. Further support for a primary emission source comes from the regional scale model simulations, where the observed concentrations of ethanol and acetaldehyde can only be reconciled with the inclusion of large primary emissions. Although only constrained by one set of observations, the regional modelling suggests a European ethanol source similar in magnitude to that of ethane (∼60 Gg per year) and greater than that of acetaldehyde (∼10 Gg per year). The

  4. Aircraft trace gas measurements during the London 2012 Olympics: Air quality and emission fluxes derived from sampling upwind and downwind of a megacity

    Science.gov (United States)

    Allen, G.; O'Shea, S.; Muller, J.; Jones, B.; O'Sullivan, D.; Lee, J. D.; Bauguitte, S.; Gallagher, M. W.; Percival, C.; Barratt, B.; McQuaid, J. B.; Illingworth, S.

    2013-12-01

    This study presents airborne in situ and remote sensing measurements recorded during July and August 2012, across the period of the London 2012 Summer Olympics and simultaneous with the Clear air for London (ClearfLo) ground-based measurement and modelling campaign. Through long-term (2-year) and intensive observation periods (Winter 2011 and Summer 2012), the ClearfLo programme aims to better understand emissions, as well as the chemical, dynamical and micro-meteorological processes which modulate air quality in the London urban environment - an important risk factor for both acute and chronic health effects. The work presented here focuses on two contrasting case studies within the summer ClearfLo period: 30 July 2012 and 9 August 2012, representing relatively clean background and polluted background cases, respectively, and characterised by well-mixed Atlantic westerly maritime inflow in the former and stagnant air (high pressure) in the latter. Measurements of CO, CO2, CH4, N2O, O3, HCN, and other gases measured on board the UK Facility for Airborne Atmospheric Measurement (FAAM) BAe-146 aircraft will be presented and interpreted, with emphasis on observed concentration gradients and tracer-tracer correlations as well as airmass vertical structure and airmass history upwind and downwind of central London in each case. By applying a simple advective model and making use of vertically resolved thermodynamic and composition data, we are able to derive emission strengths for these gases that are representative of the total enclosed surface area. Example emissions for these two cases range between 6x105 kg(C)/hr and 9x105 kg(C)/hr for CO2, and ~0.6x105 kg(C)/hr for CH4. This airborne sampling methodology highlights the unique utility of aircraft measurements to routinely and climatologically characterise emissions from area sources such as cities, and points to future missions to target localised hotspots and distributed point sources.

  5. The development and implementation of the structured training programme for caregivers of inpatients after stroke (TRACS) intervention: the London Stroke Carers Training Course.

    Science.gov (United States)

    Forster, Anne; Dickerson, Josie; Melbourn, Anne; Steadman, Jayne; Wittink, Margreet; Young, John; Kalra, Lalit; Farrin, Amanda

    2015-03-01

    To describe the content and delivery of the adapted London Stroke Carers Training Course intervention evaluated in the Training Caregivers after Stroke (TRACS) trial. The London Stroke Carers Training Course is a structured training programme for caregivers of inpatients who are likely to return home after their stroke. The course was delivered by members of the multidisciplinary team while the patient was in the stroke unit with one recommended 'follow through' session after discharge home. The intervention consists of 14 training components (six mandatory) that were identified as important knowledge/skills that caregivers would need to be able to care for the stroke patient after discharge home. Following national training days, the London Stroke Carers Training Course was disseminated to intervention sites by the cascade method of implementation. The intervention was adapted for implementation across a range of stroke units. Training days were well attended (median 2.5 and 2.0 attendees per centre for the first and second days, respectively) and the feedback positive, demonstrating 'face validity' for the intervention. However cascading of this training to other members of the multidisciplinary team was not consistent, with 7/18 centres recording no cascade training. The adapted London Stroke Carers Training Course provided a training programme that could be delivered in a standardised, structured way in a variety of stroke unit settings throughout the UK. The intervention was well received by stroke unit staff, however, the cascade method of implementation was not as effective as we would have wished. © The Author(s) 2014.

  6. Clinical leadership development in postgraduate medical education and training: policy, strategy, and delivery in the UK National Health Service

    Directory of Open Access Journals (Sweden)

    Aggarwal R

    2015-11-01

    Full Text Available Reena Aggarwal,1,2 Tim Swanwick2 1Women's Health, Whittington Health, London, UK; 2Health Education England, North Central and East London, London, UK Abstract: Achieving high quality health care against a background of continual change, increasing demand, and shrinking financial resource is a major challenge. However, there is significant international evidence that when clinicians use their voices and values to engage with system delivery, operational efficiency and care outcomes are improved. In the UK National Health Service, the traditional divide between doctors and managers is being bridged, as clinical leadership is now foregrounded as an important organizational priority. There are 60,000 doctors in postgraduate training (junior doctors in the UK who provide the majority of front-line patient care and form an "operating core" of most health care organizations. This group of doctors is therefore seen as an important resource in initiating, championing, and delivering improvement in the quality of patient care. This paper provides a brief overview of leadership theories and constructs that have been used to develop a raft of interventions to develop leadership capability among junior doctors. We explore some of the approaches used, including competency frameworks, talent management, shared learning, clinical fellowships, and quality improvement. A new paradigm is identified as necessary to make a difference at a local level, which moves learning and leadership away from developing "leaders", to a more inclusive model of developing relationships between individuals within organizations. This shifts the emphasis from the development of a "heroic" individual leader to a more distributed model, where organizations are "leader-ful" and not just "well led" and leadership is centered on a shared vision owned by whole teams working on the frontline. Keywords: National Health Service, junior doctors, quality improvement, management, health care

  7. IEEE1588协议在工业以太网中的实现%Implementation of IEEE 1588 Protocol over Industrial Ethernet

    Institute of Scientific and Technical Information of China (English)

    关松青; 肖昌炎; 夏晓荣

    2011-01-01

    An IEEE 1588 server, which is based on the foreground/background system with the priorities of interrupts, is designed and implemented to meet the high precision requirement of time synchronization in distributed power systems by using an ARM(@)CortexTM-M3 based microcontroller, which supports IEEE 1588 protocol. The burden of microcontroller is reduced and the real-time performance is further improved as a result of adopting the lightweight TCP/IP stack and simplifying the protocol's complexity to program the bottom communication software. It is shown in test experiments that this server characterizes high clock-synchronizatiun accuracy, excellent stability and low cost, and it has a bright prosperity to be applied into practice.%为满足电力等分布式测控系统对时钟同步的高精度要求,采用TI公司支持IEEE 1588协议的Cortex-M3核ARM芯片作为微处理器,设计并实现一种基于中断优先级的前/后台框架的精密时钟网络服务器.由于选用轻量级TCP/IP协议栈(LwIP)和简化同步协议设计底层通信软件,能减轻处理器负担,实时性能得到改善.测试实验结果表明,该设备同步精度高、稳定性好、成本低,具有较好的应用前景.

  8. Improved Survival from Ovarian Cancer in Patients Treated in Phase III Trial Active Cancer Centres in the UK.

    Science.gov (United States)

    Khoja, L; Nolan, K; Mekki, R; Milani, A; Mescallado, N; Ashcroft, L; Hasan, J; Edmondson, R; Winter-Roach, B; Kitchener, H C; Mould, T; Hutson, R; Hall, G; Clamp, A R; Perren, T; Ledermann, J; Jayson, G C

    2016-12-01

    Ovarian cancer is the principal cause of gynaecological cancer death in developed countries, yet overall survival in the UK has been reported as being inferior to that in some Western countries. As there is a range of survival across the UK we hypothesised that in major regional centres, outcomes are equivalent to the best internationally. Data from patients treated in multicentre international and UK-based trials were obtained from three regional cancer centres in the UK; Manchester, University College London and Leeds (MUL). The median progression-free survival (PFS) and overall survival were calculated for each trial and compared with the published trial data. Normalised median survival values and the respective 95% confidence intervals (ratio of pooled MUL data to trial median survival) were calculated to allow inter-trial survival comparisons. This strategy then allowed a comparison of median survival across the UK, in three regional UK centres and in international centres. The analysis showed that the trial-reported PFS was the same in the UK, in the MUL centres and in international centres for each of the trials included in the study. Overall survival was, however, 45% better in major regional centre-treated patients (95% confidence interval 9-73%) than the median overall survival reported in UK trials, whereas the median overall survival in MUL centres equated with that achieved in international centres. The data suggest that international survival statistics are achieved in UK regional cancer centres. Copyright © 2016 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.

  9. Assessment of micro-scale anaerobic digestion for management of urban organic waste: A case study in London, UK.

    Science.gov (United States)

    Walker, M; Theaker, H; Yaman, R; Poggio, D; Nimmo, W; Bywater, A; Blanch, G; Pourkashanian, M

    2017-03-01

    This paper describes the analysis of an AD plant that is novel in that it is located in an urban environment, built on a micro-scale, fed on food and catering waste, and operates as a purposeful system. The plant was built in 2013 and continues to operate to date, processing urban food waste and generating biogas for use in a community café. The plant was monitored for a period of 319days during 2014, during which the operational parameters, biological stability and energy requirements of the plant were assessed. The plant processed 4574kg of food waste during this time, producing 1008m(3) of biogas at average 60.6% methane. The results showed that the plant was capable of stable operation despite large fluctuations in the rate and type of feed. Another innovative aspect of the plant was that it was equipped with a pre-digester tank and automated feeding, which reduced the effect of feedstock variations on the digestion process. Towards the end of the testing period, a rise in the concentration of volatile fatty acids and ammonia was detected in the digestate, indicating biological instability, and this was successfully remedied by adding trace elements. The energy balance and coefficient of performance (COP) of the system were calculated, which concluded that the system used 49% less heat energy by being housed in a greenhouse, achieved a net positive energy balance and potential COP of 3.16 and 5.55 based on electrical and heat energy, respectively. Greenhouse gas emissions analysis concluded that the most important contribution of the plant to the mitigation of greenhouse gases was the avoidance of on-site fossil fuel use, followed by the diversion of food waste from landfill and that the plant could result in carbon reduction of 2.95kg CO2eq kWh(-1) electricity production or 0.741kg CO2eq kg(-1) waste treated. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Pharma Pricing & Market Access Europe 2016--Health Network Communications' Tenth Annual Conference (February 23-25, 2016--London, UK).

    Science.gov (United States)

    D'Souza, P

    2016-03-01

    Tighter national budgets and escalating drug prices continue to present challenges for pharmaceutical market access strategies and societal cost of care. As pharmaceutical companies and medical governmental advisory organizations enter tougher negotiations, hospital trusts and other dispensary firms face barriers to receiving the best medical treatment, and as a result patient access is limited. The 2016 HealthNetwork Communications' Pharma Pricing & Market Access Europe meeting brought together pharmaceutical, medical governmental advisory and stakeholders and market access/pricing consultants, to encourage discussions and negotiations into how to improve the drug pricing system and consequential market access strategies while achieving the respective reimbursement and affordability objectives. Copyright 2016 Prous Science, S.A.U. or its licensors. All rights reserved.

  11. Trust, Autonomy and Relationships: The Help-Seeking Preferences of Young People in Secondary Level Schools in London (UK)

    Science.gov (United States)

    Leavey, Gerard; Rothi, Despina; Paul, Rini

    2011-01-01

    Help-seeking among young people is complicated, often determined vicariously by the ability of adults, family or professionals, to recognize, and respond to, their difficulties. We know very little about the complex concerns of teenage young people and how they impact on help-seeking preferences. We aimed to ascertain the help-seeking preferences…

  12. Lessons for climate policy from The Great Stink of London

    Science.gov (United States)

    Skuce, A.

    2012-12-01

    A rapidly growing population and the introduction of the flush toilet in nineteenth-century London caused a crisis with sewage pollution in the River Thames (Halliday, 1999). There were decades of delays in implementing solutions owing to: inadequate governance institutions; political inertia; difficulties with financing; opposition from vested interests; scientific uncertainties; and technological challenges. Effective counter-measures were started only once the problem arose, quite literally, under the noses of parliamentarians. There are parallels, some of them pointed out earlier by Alley et al (2010), between the sewage crisis in Victorian London and the current problem with climate change. Both involve the unsustainable use of a common resource (a river, the atmosphere) for the unconstrained disposal of human waste products. Alley (2011) estimated that the costs of providing clean water and sanitation are comparable to the expected costs of reducing greenhouse gas emissions. Despite the similarities, the climate change issue is actually much more difficult because of: a) the unequal and uncertain global distribution of cause and effect; b) its long, intergenerational time lines; c) the insufficiency of adequate institutions, conventions or the tools— political, moral or economic—for tackling the climate crisis. This analysis is consistent with the model proposed by Gardiner (2011) in his book A Perfect Moral Storm. The three "storms" he identifies, the global, intergenerational and theoretical storms, combine in a powerful synergy to create a challenge of unprecedented intractability, providing opportunities for what Gardiner calls moral corruption: the obscuring of the buck-passing and procrastination that characterizes climate policy today. In Victorian London, the crucial steps to solve the sewage crises were not taken until the stench from the River Thames during the hot summer of 1858 rendered the House of Commons uninhabitable. A greater stink of a

  13. Two daily smoke maxima in eighteenth century London air

    Science.gov (United States)

    Harrison, R. Giles

    Varied electrostatics experiments followed Benjamin Franklin's pioneering atmospheric investigations. In Knightsbridge, Central London, John Read (1726-1814) installed a sensing rod in the upper part of his house and, using a pith ball electrometer and Franklin chimes, monitored atmospheric electricity from 1789 to 1791. Atmospheric electricity is sensitive to weather and smoke pollution. In calm weather conditions, Read observed two daily electrification maxima in moderate weather, around 9 am and 7 pm. This is likely to represent a double diurnal cycle in urban smoke. Before the motor car and steam railways, one source of the double maximum smoke pattern was the daily routine of fire lighting for domestic heating.

  14. The psychological and psychiatric effects of terrorism: lessons from London.

    Science.gov (United States)

    Rubin, G James; Wessely, Simon

    2013-09-01

    The 7 July 2005 bombings in London caused heightened levels of distress among some in the general community. This distress was most notable in Muslims and members of ethnic minority groups. These effects were transient for most. An estimated 30% of those who were more affected by the attacks, including victims and witnesses, developed psychiatric disorders as a result. An outreach program was set up to screen those who were exposed to potentially traumatic events and to offer them evidence-based treatment. This article discusses what lessons might be learned from studies of the general community and the screen-and-treat approach. Copyright © 2013 Elsevier Inc. All rights reserved.

  15. Stylistic Analysis of William Blake’s Poem London

    Institute of Scientific and Technical Information of China (English)

    陈杨波

    2014-01-01

    William Blake utilized ingenious language in his creation of the poem London. Foregrounding and deviation are well practised in this poem. In rhyme pattern, the poem takes end rhyme, consonance, alliteration and internal rhyme. In rhythm pat-tern, the poem mainly uses iambic tetrameter along with the variation of three troches and one single stress at the end of lines which produces a shocking atmosphere. Among syntax features, emphatic pattern and anticipatory structure are used. Among lexi-cal features, the reiteration of specific words makes neat euphonious parallelism while the subtle pun word create a far-reaching artistry.

  16. Regeneralized London free energy for high-Tc vortex lattices

    Directory of Open Access Journals (Sweden)

    M. A. Shahzamanian

    2006-09-01

    Full Text Available   The London free-energy is regeneralized by the Ginsburg-Landau free-energy density in the presence of both d and s order parameters. We have shown that the strength of the s-d coupling, makes an important rule to determine the form of the lattice vortex. Appearance of the ratios of the coherence length to penetration depth in the higher order corrections of the free-energy density will truncate these corrections for even large values of .

  17. Carrington-L5: The UK/US Space Weather Operational Mission.

    Science.gov (United States)

    Bisi, M. M.; Trichas, M.

    2015-12-01

    Airbus Defence and Space (UK) have carried out a study for an operational L5 space weather mission, in collaboration with RAL, the UK Met Office, UCL and Imperial College London. The study looked at the user requirements for an operational mission, a model instrument payload, and a mission/spacecraft concept. A particular focus is cost effectiveness and timelineness of the data, suitable for operational forecasting needs. The study focussed on a mission at L5 assuming that a US mission to L1 will already occur, on the basis that L5 offers the greatest benefit for SWE predictions. The baseline payload has been selected to address all MOSWOC/SWPC priorities using UK/US instruments, consisting of: a heliospheric imager, coronagraph, EUV imager, magnetograph, magnetometer, solar wind analyser and radiation monitor. The platform is based on extensive re-use from Airbus' past missions to minimize the cost and a Falcon-9 launcher has been selected on the same basis. A schedule analysis shows that the earliest launch could occur in 2020, assuming Phase A KO in 2015. The study team have selected the name "Carrington" for the mission, reflecting the UK's proud history in this domain.

  18. Balancing Fear: Why Counter-Terror Legislation was Blocked after the Oklahoma City and London Bombings

    Directory of Open Access Journals (Sweden)

    Gabriel Rubin

    2010-11-01

    executive approval ratings are critical to the passage of counter-terror laws.  In light of the recent slew of counter-terror legislation passed worldwide, cases where counter-terror legislation has been blocked have become critically important.  To this end, this article asks, “Why does counter-terror legislation get blocked when it does?”  To answer the question, three variables are tested: partisan composition of the government, public opinion-based mass fear levels, and executive approval ratings.  To test the variables, two cases are evaluated: the passage of diluted counter-terror legislation after the Oklahoma City Bombing in 1995 and after the 2005 London Bombings.  In evaluating the cases, legislative debates and executive statements that occurred after the terror attacks are examined and then compared to cases from the UK in 1974 and the US in 2001 where counter-terror legislation quickly passed.  The article concludes that executive approval ratings and the partisan composition of the government have the most explanatory power in determining whether terror attacks will lead to broad counter-terror legislation or not.Keywords: London bombings; counter-terror legislation; USA; United Kingdom

  19. Balancing Fear: Why Counter-Terror Legislation was Blocked after the Oklahoma City and London Bombings

    Directory of Open Access Journals (Sweden)

    Gabriel Rubin

    2010-11-01

    executive approval ratings are critical to the passage of counter-terror laws.  In light of the recent slew of counter-terror legislation passed worldwide, cases where counter-terror legislation has been blocked have become critically important.  To this end, this article asks, “Why does counter-terror legislation get blocked when it does?”  To answer the question, three variables are tested: partisan composition of the government, public opinion-based mass fear levels, and executive approval ratings.  To test the variables, two cases are evaluated: the passage of diluted counter-terror legislation after the Oklahoma City Bombing in 1995 and after the 2005 London Bombings.  In evaluating the cases, legislative debates and executive statements that occurred after the terror attacks are examined and then compared to cases from the UK in 1974 and the US in 2001 where counter-terror legislation quickly passed.  The article concludes that executive approval ratings and the partisan composition of the government have the most explanatory power in determining whether terror attacks will lead to broad counter-terror legislation or not.Keywords: London bombings; counter-terror legislation; USA; United Kingdom

  20. Recording of hospitalizations for acute exacerbations of COPD in UK electronic health care records

    Directory of Open Access Journals (Sweden)

    Rothnie KJ

    2016-11-01

    Full Text Available Kieran J Rothnie,1,2 Hana Müllerová,3 Sara L Thomas,2 Joht S Chandan,4 Liam Smeeth,2 John R Hurst,5 Kourtney Davis,3 Jennifer K Quint1,2 1Respiratory Epidemiology, Occupational Medicine and Public Health, National Heart and Lung Institute, Imperial College London, London, UK; 2Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK; 3Respiratory Epidemiology, GlaxoSmithKline R&D, Uxbridge, London; 4Medical School, 5UCL Respiratory, University College London, London, UK Background: Accurate identification of hospitalizations for acute exacerbations of chronic obstructive pulmonary disease (AECOPD within electronic health care records is important for research, public health, and to inform health care utilization and service provision. We aimed to develop a strategy to identify hospitalizations for AECOPD in secondary care data and to investigate the validity of strategies to identify hospitalizations for AECOPD in primary care data. Methods: We identified patients with chronic obstructive pulmonary disease (COPD in the Clinical Practice Research Datalink (CPRD with linked Hospital Episodes Statistics (HES data. We used discharge summaries for recent hospitalizations for AECOPD to develop a strategy to identify the recording of hospitalizations for AECOPD in HES. We then used the HES strategy as a reference standard to investigate the positive predictive value (PPV and sensitivity of strategies for identifying AECOPD using general practice CPRD data. We tested two strategies: 1 codes for hospitalization for AECOPD and 2 a code for AECOPD other than hospitalization on the same day as a code for hospitalization due to unspecified reason. Results: In total, 27,182 patients with COPD were included. Our strategy to identify hospitalizations for AECOPD in HES had a sensitivity of 87.5%. When compared with HES, using a code suggesting hospitalization for AECOPD in CPRD resulted in a PPV of 50.2% (95

  1. Creating a no-blame culture through medical education: a UK perspective

    Directory of Open Access Journals (Sweden)

    Elmqvist KO

    2016-08-01

    Full Text Available Karl O Elmqvist,1 Maxime TJ Rigaudy,1,2 Jasper P Vink1 1Imperial College Business School, Imperial College London, London, UK; 2Hull York Medical School, York, UK We read with great interest, and agree with the points made, in the Commentary by Leotsakos et al1 regarding the need to integrate patient safety into the core curricula for higher education in health care. The World Health Organisation (WHO patient safety curriculum guide: multi-professional edition (Geneva: Switzerland 2011 appears to be an effective aid to achieve this aim, promoting the culture of patient safety internationally. In the UK, where patient safety is a defining part of quality of care,2 attempts have been made to introduce the concept of a “no-blame culture”. The no-blame culture was introduced as a method to improve the quality of care by learning from mistakes, putting safeguards in place to ensure they do not occur again.  View the original paper by Leotsakos and colleagues.

  2. Next generation WLAN technology--IEEE 802.11ac%下一代WLAN技术IEEE 802.11ac

    Institute of Scientific and Technical Information of China (English)

    郭正跃

    2013-01-01

    IEEE 802.11ac是继802.11n的下一代无线局域网新技术标准,本文主要介绍了802.11ac在新技术方面的特性,重点介绍了MU-MIMO系统在802.11ac中的应用,包括MU-MIMO中多用户调度公平性问题的解决及目前最新的SLNR波束成形技术对多用户间干扰问题的解决方案。%IEEE 802.11ac is the second generation of 802.11n wireless LAN technical standard. The paper mainly introduces the features in new technical aspect and highlights the MU-MIMO system in the application of 802.11ac including the solution of multi-user scheduling fairness problem in MU-MIMO and the latest SLNR beam-forming techniques for multi-user interference.

  3. Analysis on Jack London's Feminist Point of View in Martin Eden

    Institute of Scientific and Technical Information of China (English)

    陈俊汀

    2016-01-01

    Martin Eden is one of the famous novels of Jack London, who is a distinguished writer in America, and now it still wins great popularity in the whole world. In this novel, the author Jack London depicts the protagonist Martin Eden's striving for success incisively. This thesis, based on the theory of feminism, will give a detailed analysis of the character traits of female characters in Martin Eden and Jack London's attitudes towards women.

  4. ""Thames Valley cotton pickers"": Race and youth in London blues culture

    OpenAIRE

    2005-01-01

    This study addresses the reception of African American blues music and the ensuing production of English blues in London from 1955 to 1966. It concentrates on London adolescents' unexpected fascination with a musical style that they virtually had no contact with prior to 1955, while analyzing how this immersion in African American culture shaped their cultural identity. Analysis of the influence of African American blues music in London during this period highlights the BBC's weakened influen...

  5. A network architecture for precision formation flying using the IEEE 802.11 MAC Protocol

    Science.gov (United States)

    Clare, Loren P.; Gao, Jay L.; Jennings, Esther H.; Okino, Clayton

    2005-01-01

    Precision Formation Flying missions involve the tracking and maintenance of spacecraft in a desired geometric formation. The strong coupling of spacecraft in formation flying control requires inter-spacecraft communication to exchange information. In this paper, we present a network architecture that supports PFF control, from the initial random deployment phase to the final formation. We show that a suitable MAC layer for the application protocol is IEEE's 802.11 MAC protocol. IEEE 802.11 MAC has two modes of operations: DCF and PCF. We show that DCF is suitable for the initial deployment phase while switching to PCF when the spacecraft are in formation improves jitter and throughput. We also consider the effect of routing on protocol performance and suggest when it is profitable to turn off route discovery to achieve better network performance.

  6. Capacity Evaluation for IEEE 802.16e Mobile WiMAX

    Directory of Open Access Journals (Sweden)

    Chakchai So-In

    2010-01-01

    Full Text Available We present a simple analytical method for capacity evaluation of IEEE 802.16e Mobile WiMAX networks. Various overheads that impact the capacity are explained and methods to reduce these overheads are also presented. The advantage of a simple model is that the effect of each decision and sensitivity to various parameters can be seen easily. We illustrate the model by estimating the capacity for three sample applications—Mobile TV, VoIP, and data. The analysis process helps explain various features of IEEE 802.16e Mobile WiMAX. It is shown that proper use of overhead reducing mechanisms and proper scheduling can make an order of magnitude difference in performance. This capacity evaluation method can also be used for validation of simulation models.

  7. RSAD: A Robust Distributed Contention-Based Adaptive Mechanism for IEEE 802.11 Wireless LANs

    Institute of Scientific and Technical Information of China (English)

    Yong Peng; Shi-Duan Cheng; Jun-Liang Chen

    2005-01-01

    Previous researches have shown that Distributed Coordination Function (DCF) access mode of IEEE 802.11 has lower performance in heavy contention environment. Based on the in-depth analysis of IEEE 802.11 DCF, NSAD (New Self-adapt DCF-based protocol) has been proposed to improve system saturation throughput in heavy contention condition.The initial contention window tuning algorithm of NSAD is proved effective in error-free environment. However, problems concerning the exchanging of initial contention window occur in error-prone environment. Based on the analysis of NSAD's performance in error-prone environment, RSAD is proposed to further enhance the performance. Simulation in a more real shadowing error-prone environment is done to compare the performance of NSAD and RSAD and results have shown that RSAD can achieve further performance improvement as expected in the error-prone environment than NSAD (i.e., better goodput and fairness index).

  8. Performance evaluation on IEEE 802.11e considering emergency calls in congested situation

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    To enhance the quality of service (QoS) support in IEE 802.11, IEEE 802.11e has been studied, which introduces the so-called hybrid coordination function (HCF). HCF includes two medium access mechanisms: contention-based channel access (EDCA), and contention-free channel access (HCCA). Although IEEE 802.11e has provided differentiated channel access mechanism, when call demand rises for important festivals such as New Year's Day or large scale natural disasters such as earthquakes, the delay of voice will increase and the QoS of voice nodes will drop down rapidly. Through our simulation study, in order to guarantee the QoS of emergency voice calls in congested situation, a higher priority for these calls will be required.

  9. Performance Analysis of IEEE 802.16e Wimax Physical Layer

    Directory of Open Access Journals (Sweden)

    Dr. Vineeta Saxena Nigam *,

    2014-05-01

    Full Text Available WiMAX (worldwide inter-operability for microwave access is an emerging technology for global broadband wireless system offering high speed access to mobile and broadband services. It is based on IEEE 802.16e standard. This standard only deals with MAC and PHY layer specification of network architecture. Considerable research has been done on performance analysis of PHY layer model of WiMAX system over AWGN channel model. This paper attempts performance analysis of IEEE 802.16e PHY layer model over AWGN as well as SUI channel models as SUI channel models are more realistic models based on empirical results. Different modulation schemes, coding rates, and different values of cyclic prefix are considered for comparison using BER (Bit error rate ratio and SNR (Signal to Noise ratio as performance parameters.

  10. Real-Time Performance Analysis of Infrastructure-based IEEE 802.11 Distributed Coordination Function

    CERN Document Server

    Xia, Feng; Wang, Linqiang; Hao, Ruonan

    2012-01-01

    With the increasing popularity of wireless networks, wireless local area networks (WLANs) have attracted significant research interest, which play a critical role in providing anywhere and anytime connectivity. For WLANs the IEEE 802.11 standard is the most mature technology and has been widely adopted for wireless networks. This paper analyzes real-time performance of the IEEE 802.11 standard that adopts the MAC protocol of Distributed Coordination Function (DCF) operating in infrastructure mode. Extensive simulations have been done to examine how the network performance in terms of realtime metrics including effective data rate, latency and packet loss rate will be impacted by some critical parameters (e.g. CWmin and packet payload). The results are presented and analyzed. The analysis of simulation results can provide support for parameter configuration and optimization of WLANs for realtime applications.

  11. Integration of IEEE 1451 and HL7 Exchanging Information for Patients’ Sensor Data

    Science.gov (United States)

    Lim, Suyoung; Ahn, Jinsoo; Nah, Jiyoung; Kim, Namhyun

    2009-01-01

    HL7 (Health Level 7) is a standard developed for exchanging incompatible healthcare information generated from programs or devices among heterogenous medical information systems. At present, HL7 is growing as a global standard. However, the HL7 standard does not support effective methods for treating data from various medical sensors, especially from mobile sensors. As ubiquitous systems are growing, HL7 must communicate with various medical transducers. In the area of sensor fields, IEEE 1451 is a group of standards for controlling transducers and for communicating data from/to various transducers. In this paper, we present the possibility of interoperability between the two standards, i.e., HL7 and IEEE 1451. After we present a method to integrate them and show the preliminary results of this approach. PMID:20703604

  12. Performance Analytical Model of IEEE 802.11 Distributed Coordination Function

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    IEEE 802.11 distributed coordination function (DCF) is a distributed medium access scheme based on carrier sense multiple access with collision avoidance (CSMA/CA) protocol. Many literatures have analyzed the performance of IEEE 802.11 DCF. However, such literatures either used simulation methods or built the analytical models under the assumption that the saturation condition was satisfied. To overcome such a problem, in this paper, a bi-dimensional Markovian model has been introduced to depict the DCF mechanism. The proposed model introduced an idle stage and a discrete time M/G/1 queue to deduce the channel throughput under finite load traffic. Simulation results proved the accuracy of the proposed model.

  13. An Improved Markov Model for IEEE 802.15.4 Slotted CSMA/CA Mechanism

    Institute of Scientific and Technical Information of China (English)

    Hao Wen; Chuang Lin; Zhi-Jia Chen; Hao Yin; Tao He; Eryk Dutkiewicz

    2009-01-01

    IEEE 802.15.4 protocol is proposed to meet the low latency and energy consumption needs in low-rate wireless applications, however, few analytical models are tractable enough for comprehensive evaluation of the protocol. To evaluate the IEEE 802.15.4 slotted CSMA/CA channel access mechanism in this paper, we propose a practical and accurate discrete Markov chain model, which can dynamically represent different network loads. By computing the steady-state distribution probability of the Markov chain, we obtain an evaluation formula for throughput, energy consumption, and access latency. Then we further analyze the parameters that influence performance including packet arrival rate, initial backoff exponent and maximum backoff number. Finally, NS2 simulator has been used to evaluate the performance of the 802.15.4 CSMA/CA mechanism under different scenarios and to validate the accuracy of the proposed model.

  14. The Research of ST-OFDM in Physical Layer of IEEE 802.16a

    Institute of Scientific and Technical Information of China (English)

    JU Mei-yan; ZHU Qi; FENG Guang-zeng

    2004-01-01

    This paper briefly introduces one of the three physical layer implementations of IEEE 802.16a[1], Wireless MAN-OFDM PHY. Based on the implementation, the combination of Orthogonal Frequency Division Multiplexing (OFDM) and Space-Time Coding ( STC ) which is briefly called ST-OFDM in IEEE 802.16a, is investigated under the channel provided in Ref . [ 2 ]. Especially, this paper is focused on the influence of the optimal decision threshold on the system Bit-Error-Rate ( BER ) performance based on unequal probabilities of sources. The simulations show that when SignalNoise-Ratio ( SNR ) is low the optimal decision threshold is obviously superior to the usual one; when SNR is high to some extent, such as 10 dB for 4QAM and 16 dB for 16QAM, we can use the usual decision threshold instead of the optimal one .

  15. Pilot Based Channel Estimation in IEEE 802.16a OFDM System

    Institute of Scientific and Technical Information of China (English)

    ZHU Qi; LU Hao

    2005-01-01

    Orthogonal Frequency Division Multiplexing(OFDM)is a kind of transmission techniques with high frequency efficiency,which will be widely used in next-generation wireless communication systems.In this paper,pilot-based channel estimation for IEEE 802.16a OFDM system is studied.By comparing the performance of LS(least squares)estimator and Linear Minimum Mean-Square Error(LMMSE)estimator using Preamble 1 and Preamble 2 suggested by IEEE 802.16a standard in slow fading channel,we propose that Preamble 1 can be used in small multipath delay spread channel and Preamble 2 can be used in large multipath delay spread channel.Considering the tradeoff between performance and complexity,the LS estimator is suggested.

  16. A Novel IEEE 802.15.4e DSME MAC for Wireless Sensor Networks

    Science.gov (United States)

    Sahoo, Prasan Kumar; Pattanaik, Sudhir Ranjan; Wu, Shih-Lin

    2017-01-01

    IEEE 802.15.4e standard proposes Deterministic and Synchronous Multichannel Extension (DSME) mode for wireless sensor networks (WSNs) to support industrial, commercial and health care applications. In this paper, a new channel access scheme and beacon scheduling schemes are designed for the IEEE 802.15.4e enabled WSNs in star topology to reduce the network discovery time and energy consumption. In addition, a new dynamic guaranteed retransmission slot allocation scheme is designed for devices with the failure Guaranteed Time Slot (GTS) transmission to reduce the retransmission delay. To evaluate our schemes, analytical models are designed to analyze the performance of WSNs in terms of reliability, delay, throughput and energy consumption. Our schemes are validated with simulation and analytical results and are observed that simulation results well match with the analytical one. The evaluated results of our designed schemes can improve the reliability, throughput, delay, and energy consumptions significantly.

  17. A Priority and SDB based Admission Control in IEEE 802.16 Systems

    Directory of Open Access Journals (Sweden)

    Xiu-ying Sun

    2010-09-01

    Full Text Available In IEEE 802.16 systems, the algorithm of admission control (AC is very important in guaranteeing the Quality of Service (QoS and managing service flows. However, the IEEE 802.16 standards do not specify any related strategies or algorithms on AC. In order to improve the system performance and satisfy the QoS of stations to the max, we propose a new AC strategy, which includes a weighted blocking rate based priority strategy and a satisfaction-degree based bandwidth-borrowing strategy named SDB in this paper. The simulation results show that the proposed strategy improves the overall performance of system in terms of weighted blocking rate. Furthermore, our strategy enhances the QoS in comparison with the strategy adopting conventional bandwidth-borrowing algorithm.

  18. Securing IEEE 802.11g WLAN Using Open VPN and its Impact Analysis

    Directory of Open Access Journals (Sweden)

    Praveen Likhar

    2011-12-01

    Full Text Available Like most advances, wireless LAN poses both opportunities and risks. The evolution of wireless networking in recent years has raised many serious security issues. These security issues are of greatconcern for this technology as it is being subjected to numerous attacks. Because of the free-space radio transmission in wireless networks, eavesdropping becomes easy and consequently a security breach may result in unauthorized access, information theft, interference and service degradation. Virtual Private Networks (VPNs have emerged as an important solution to security threats surrounding the use of public networks for private communications. While VPNs for wired line networks have matured in both research and commercial environments, the design and deployment of VPNs for WLAN is still an evolving field. This paper presents an approach to secure IEEE 802.11g WLAN using OpenVPN, a transport layer VPN solution and its impact on performance of IEEE 802.11g WLAN.

  19. Performance evaluation of beacon enabled IEEE 802.15.4 under NS2

    CERN Document Server

    Charfi, Faiza

    2012-01-01

    The increasing demand for real-time applications has made the Quality of Service (Qos) support for wireless sensor networks (WSN) a fairly new research framework. In this paper, we propose an extended model of the Beacon enabled IEEE 802.15.4 including the Guaranteed Time Slot GTS allocation mechanism in the aim to analyze and evaluate network performances. Series of extensive simulations were performed to analyze the impact of the Beacon Order BO and the Superframe Order SO on the network performance based on commonly known metrics. In particular, we examine data packet delivery performance and the throughput for different duty cycle rates. Also, we analyze the impact of the number of nodes on collision probability. Thus, for high number of nodes, collision becomes higher and the reachability begins to decline slightly. We discuss and compare simulation results conducted under various parameter settings to the IEEE 802.11 network.

  20. Transient Stability Improvement of IEEE 9 Bus System Using Power World Simulator

    Directory of Open Access Journals (Sweden)

    Kaur Ramandeep

    2016-01-01

    Full Text Available The improvement of transient stability of power system was one of the most challenging research areas in power engineer.The main aim of this paper was transient stability analysis and improvement of IEEE 9 bus system. These studies were computed using POWER WORLD SIMULATOR. The IEEE 9 bus system was modelled in power world simulator and load flow studies were performed to determine pre-fault conditions in the system using Newton-Raphson method. The transient stability analysis was carried out using Runga method during three-phase balanced fault. For the improvement transient stability, the general methods adopted were fast acting exciters, FACT devices and addition of parallel transmission line. These techniques play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations.

  1. Securing IEEE 802.11G WLAN Using OpenVPN and Its Impact Analysis

    CERN Document Server

    Likhar, Praveen; M, Keshava Rao; 10.5121/ijnsa.2011.3607

    2012-01-01

    Like most advances, wireless LAN poses both opportunities and risks. The evolution of wireless networking in recent years has raised many serious security issues. These security issues are of great concern for this technology as it is being subjected to numerous attacks. Because of the free-space radio transmission in wireless networks, eavesdropping becomes easy and consequently a security breach may result in unauthorized access, information theft, interference and service degradation. Virtual Private Networks (VPNs) have emerged as an important solution to security threats surrounding the use of public networks for private communications. While VPNs for wired line networks have matured in both research and commercial environments, the design and deployment of VPNs for WLAN is still an evolving field. This paper presents an approach to secure IEEE 802.11g WLAN using OpenVPN, a transport layer VPN solution and its impact on performance of IEEE 802.11g WLAN.

  2. A Fast MAC-Layer Handover for an IEEE 802.16e-Based WMAN

    Science.gov (United States)

    Ray, Sayan K.; Pawlikowski, Krzysztof; Sirisena, Harsha

    We propose a modification of the IEEE 802.16e hard handover (HHO) procedure, which significantly reduces the handover latency constraint of the original HHO procedure in IEEE 802.16e networks. It allows a better handling of the delay-sensitive traffic by avoiding unnecessary time-consuming scanning and synchronization activity as well as simplifies the network re-entry procedure. With the help of the backhaul network, it reduces the number of control messages in the original handover policy, making the handover latency acceptable also for real-time streaming traffic. Preliminary performance evaluation studies show that the modified handover procedure is able to reduce the total handover latency by about 50%.

  3. Uplink Scheduling for Supporting Real Time Voice Traffic in IEEE 802.16 Backhaul Networks

    Institute of Scientific and Technical Information of China (English)

    Lizhong Dai; Dongmei Zhao

    2008-01-01

    In this paper we propose simple enhancements to the bandwidth (BW) request messages in IEEE 802.16 for supporting real-time packet voice traffic. Three different BW request formats are proposed, each requiring a different amount of latency information about the buffered packets at the SS. On this basis, packet scheduling schemes are proposed for the BS to make resource allocations for real-time traffic. Our results show that the proposed BW request and scheduling schemes achieve significantly lower packet loss probability than the standard IEEE 802.16 BW request with round robin scheduling.The results further show that there is an optimum point about how much delay information the SS should report to the BS in order to best utilize the uplink resources while the SS provides satisfactory real-time performance for the voice traffic.

  4. Performance Evaluation Of BEACON-ENABLED IEEE 802.15.4 Under NS2

    Directory of Open Access Journals (Sweden)

    Faiza Charfi

    2012-04-01

    Full Text Available The increasing demand for real-time applications has made the Quality of Service (Qos support for wireless sensor networks (WSN a fairly new research framework. In this paper, we propose an extended model of the Beacon enabled IEEE 802.15.4 including the Guaranteed Time Slot GTS allocation mechanism in the aim to analyze and evaluate network performances. Series of extensive simulations were performed to analyze the impact of the Beacon Order BO and the Superframe Order SO on the network performance based on commonly known metrics. In particular, we examine data packet delivery performance and the throughput for different duty cycle rates. Also, we analyze the impact of the number of nodes on collision probability. Thus, for high number of nodes, collision becomes higher and the reachability begins to decline slightly. We discuss and compare simulation results conducted under various parameter settings to the IEEE 802.11network.

  5. A Survey of Mobile WiMAX IEEE 802.16m Standard

    CERN Document Server

    Rakesh, Jha; Dalal, Upena

    2010-01-01

    IEEE 802.16m amends the IEEE 802.16 Wireless MAN-OFDMA specification to provide an advanced air interface for operation in licenced bands. It will meet the cellular layer requirements of IMT-Advanced next generation mobile networks. It will be designed to provide significantly improved performance compared to other high rate broadband cellular network systems. For the next generation mobile networks, it is important to consider increasing peak, sustained data reates, corresponding spectral efficiencies, system capacity and cell coverage as well as decreasing latency and providing QoS while carefully considering overall system complexity. In this paper we provide an overview of the state-of-the-art mobile WiMAX technology and its development. We focus our discussion on Physical Layer, MAC Layer, Schedular,QoS provisioning and mobile WiMAX specification.

  6. A nomadic access mechanism for enabling dynamic video surveillance over IEEE 802.15.4 networks

    Science.gov (United States)

    Garcia-Sanchez, Felipe; Garcia-Sanchez, Antonio-Javier; Losilla, Fernando; Garcia-Haro, Joan

    2010-12-01

    IEEE 802.15.4 networking technology is designed to be the common standard for integrating WSN applications in heterogeneous environments. However, applications considering mobile nodes along with strict temporal requirements, such as those required for video transmission, are an unexplored field for this technology. These applications involve different challenges and issues that the direct employment of the IEEE 802.15.4 standard does not resolve. Therefore, in this paper a cross-layer mechanism consisting of application and medium access arbitration is presented, enabling the efficient connection and operation of mobile nodes together with the transmission of video flows. The proposed mechanism is evaluated via simulation and its feasibility checked by means of a first prototype. The study of power consumption is also taken into account and so are the quality of service parameters and the human quality perception of the received video stream. The results obtained are presented and further discussed.

  7. Hybrid Polling Method for Direct Link Communication for IEEE 802.11 Wireless LANs

    Directory of Open Access Journals (Sweden)

    Woo-Yong Choi

    2008-10-01

    Full Text Available The direct link communication between STAtions (STAs is one of the techniques to improve the MAC performance of IEEE 802.11 infrastructure networks. For the efficient direct link communication, in the literature, the simultaneous polling method was proposed to allow the multiple direct data communication to be performed simultaneously. However, the efficiency of the simultaneous polling method is affected by the interference condition. To alleviate the problem of the lower polling efficiency with the larger interference range, the hybrid polling method is proposed for the direct link communication between STAs in IEEE 802.11 infrastructure networks. By the proposed polling method, we can integrate the sequential and simultaneous polling methods properly according to the interference condition. Numerical examples are also presented to show the medium access control (MAC performance improvement by the proposed polling method.

  8. A Novel IEEE 802.15.4e DSME MAC for Wireless Sensor Networks.

    Science.gov (United States)

    Sahoo, Prasan Kumar; Pattanaik, Sudhir Ranjan; Wu, Shih-Lin

    2017-01-16

    IEEE 802.15.4e standard proposes Deterministic and Synchronous Multichannel Extension (DSME) mode for wireless sensor networks (WSNs) to support industrial, commercial and health care applications. In this paper, a new channel access scheme and beacon scheduling schemes are designed for the IEEE 802.15.4e enabled WSNs in star topology to reduce the network discovery time and energy consumption. In addition, a new dynamic guaranteed retransmission slot allocation scheme is designed for devices with the failure Guaranteed Time Slot (GTS) transmission to reduce the retransmission delay. To evaluate our schemes, analytical models are designed to analyze the performance of WSNs in terms of reliability, delay, throughput and energy consumption. Our schemes are validated with simulation and analytical results and are observed that simulation results well match with the analytical one. The evaluated results of our designed schemes can improve the reliability, throughput, delay, and energy consumptions significantly.

  9. A note on bound constraints handling for the IEEE CEC'05 benchmark function suite.

    Science.gov (United States)

    Liao, Tianjun; Molina, Daniel; de Oca, Marco A Montes; Stützle, Thomas

    2014-01-01

    The benchmark functions and some of the algorithms proposed for the special session on real parameter optimization of the 2005 IEEE Congress on Evolutionary Computation (CEC'05) have played and still play an important role in the assessment of the state of the art in continuous optimization. In this article, we show that if bound constraints are not enforced for the final reported solutions, state-of-the-art algorithms produce infeasible best candidate solutions for the majority of functions of the IEEE CEC'05 benchmark function suite. This occurs even though the optima of the CEC'05 functions are within the specified bounds. This phenomenon has important implications on algorithm comparisons, and therefore on algorithm designs. This article's goal is to draw the attention of the community to the fact that some authors might have drawn wrong conclusions from experiments using the CEC'05 problems.

  10. 2011 IEEE Visualization Contest Winner: Visualizing Unsteady Vortical Behavior of a Centrifugal Pump

    KAUST Repository

    Otto, Mathias

    2012-09-01

    In the 2011 IEEE Visualization Contest, the dataset represented a high-resolution simulation of a centrifugal pump operating below optimal speed. The goal was to find suitable visualization techniques to identify regions of rotating stall that impede the pump\\'s effectiveness. The winning entry split analysis of the pump into three parts based on the pump\\'s functional behavior. It then applied local and integration-based methods to communicate the unsteady flow behavior in different regions of the dataset. This research formed the basis for a comparison of common vortex extractors and more recent methods. In particular, integration-based methods (separation measures, accumulated scalar fields, particle path lines, and advection textures) are well suited to capture the complex time-dependent flow behavior. This video (http://youtu.be/ oD7QuabY0oU) shows simulations of unsteady flow in a centrifugal pump. © 2012 IEEE.

  11. Performance analysis of IEEE 802.11n network under unsaturated conditions

    Science.gov (United States)

    Lang, Gaiping; Ma, Lin; Xu, Yubin

    2017-07-01

    Frame aggregation is the most important medium access control (MAC) enhancement of IEEE 802.11n. In frame aggregation, multiple frames are encapsulated into a single frame. In the analysis of 802.11n performance, the existing researches assumed that each station always had a packet for transmission. But actually, sometimes stations may have no packet to transmit. In this paper, we develop an analytical model for IEEE 802.11n in unsaturated conditions. Therefore, the transmission of the station is assumed to be a bulk service queue system. Bulk size is aggregation size. According to the 802.11n standard, when the number of packets in the buffer is smaller than the aggregation size, we can also transmit all the packets in the buffer using A-MPDU. Therefore, bulk size is variable. The throughput and mean access delay are achieved. Numerical results show that the proposed algorithm can effectively increase the throughput and lower the access delay.

  12. Integration of IEEE 1451 and HL7 exchanging information for patients' sensor data.

    Science.gov (United States)

    Kim, Wooshik; Lim, Suyoung; Ahn, Jinsoo; Nah, Jiyoung; Kim, Namhyun

    2010-12-01

    HL7 (Health Level 7) is a standard developed for exchanging incompatible healthcare information generated from programs or devices among heterogenous medical information systems. At present, HL7 is growing as a global standard. However, the HL7 standard does not support effective methods for treating data from various medical sensors, especially from mobile sensors. As ubiquitous systems are growing, HL7 must communicate with various medical transducers. In the area of sensor fields, IEEE 1451 is a group of standards for controlling transducers and for communicating data from/to various transducers. In this paper, we present the possibility of interoperability between the two standards, i.e., HL7 and IEEE 1451. After we present a method to integrate them and show the preliminary results of this approach.

  13. AN IMPROVED CHANNEL DETECTION METHOD FOR IEEE 802.11N MIMO SYSTEM

    Institute of Scientific and Technical Information of China (English)

    Yao Xiaocheng; Jian Haifang; Fang Zhi; Shi Yin

    2011-01-01

    Coexistence and interoperability between 20 MHz and 40 MHz device and modes of operations are stressed in standard IEEE 802.11n system.It is mandate to report the both sub-channels states to Medium Access Control (MAC) at receiver,since for 40 MHz device,it should serve not only 20 MHz but also 40 MHz signals receiving.Both energy detection and carrier sense are employed to detect channel state.In the case of 20/40 M mode,the power difference between the two sub-channels is also detected in order to report the channel state accurately.The simulation results demonstrate that the performance of the proposed methods are much better than the methods which just employ energy detection.Besides,the simulation results show that the proposed methods ensure that the channel sensing is not a roadblock of IEEE 802.11n system design.

  14. The Exploration of Network Coding in IEEE 802.15.4 Networks

    Directory of Open Access Journals (Sweden)

    Deze Zeng

    2011-01-01

    communication protocol should be energy efficient. The IEEE 802.15.4 is designed as a standard protocol for low power, low data rate, low complexity, and short range connections in WPANs. The standard supports allocating several numbers of collision-free guarantee time slots (GTSs within a superframe for some time-critical transmissions. Recently, COPE was proposed as a promising network coding architecture to essentially improve the throughput of wireless networks. In this paper, we exploit the network coding technique at coordinators to improve energy efficiency of the WPAN. Some related practical issues, such as GTS allocation and multicast, are also discussed in order to exploit the network coding opportunities efficiently. Since the coding opportunities are mostly exploited, our proposal achieves both higher energy efficiency and throughput performance than the original IEEE 802.15.4.

  15. Liquidity, price impact and trade informativeness: Evidence from the London stock exchange

    National Research Council Canada - National Science Library

    Teodorovic, Natasa

    2011-01-01

    ...) market microstructure time series analysis to examine adverse selection and information asymmetry issues on diverse liquidity leveled stocks listed on the London Stock Exchange, which is a market...

  16. The international follow-up of individuals potentially exposed to polonium-210 in London 2006.

    Science.gov (United States)

    Shaw, K; Anders, K; Olowokure, B; Fraser, G; Maguire, H; Bailey, M; Smith, J; Frossell, S; Yap, K; Evans, B

    2010-06-01

    Following a death from polonium-210 ((210)Po), contamination was found at several sites in London. This paper describes the UK Health Protection Agency's follow-up and assessment of individuals resident overseas who were potentially exposed to (210)Po. Descriptive follow-up study. Individuals were classified into three exposure groups (higher, lower and unknown). Presence and degree of internal contamination were measured by 24-h urinary (210)Po activity (mBq/day). Results over 30mBq/day were taken to indicate probable contact with (210)Po in this incident. Dose assessments were conducted to determine degree of exposure and to identify individuals requiring further follow-up. Overall, 664 potentially exposed persons from 52 countries and territories were identified. Of these, 157 (24%) were in the higher exposure category, and urinary measurements were reported for 31% (48/157). Results for 19% (9/48) of those at higher exposure were more than 30mBq/day. For those at lower exposure, the percentage was 4% (3/68). Results above 30mBq/day were significantly more likely to be reported for the higher exposure category than the lower exposure category (Fisher's exact test P=0.010). Reported dose assessments suggested that identified individuals were not at increased health risk in the long term. Challenges and practical lessons were identified during the investigation. The results suggest that it is unlikely that any overseas resident had significant internal contamination with (210)Po. However, this incident clearly demonstrated the scale of international involvement likely to be necessary in other public health emergencies in large cities. The lessons identified have implications for the international health community, particularly with regard to the follow-up of individuals exposed to radiation in one country who then travel to another. Copyright 2010 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.

  17. Research of time synchronization technology based on IEEE 1588v2 in optical communication network%基于IEEE1588v2协议的光网络时间同步技术研究

    Institute of Scientific and Technical Information of China (English)

    李恩; 刘志强; 敬玉乡; 丁明吉

    2011-01-01

    分析了现有光网络中时间同步实现方法的不足,阐述了IEEE 1588v2协议的基本原理,提出了IEEE 1588v2协议在光通信网络中实现时间同步的方法,指出精确时间同步协议在光网络中的应用前景和发展方向.%This paper analyses the disadvantage of time synchronization in the optical communication network, and illustrated the fundamental principle of IEEE 1588v2 protocol, the synchronization method about IEEE 1588v2 protocol in optical communication network time was proposed. Finally,it showed the application and development direction of precision time synchronization protocol in optical communication network.

  18. IEEE 802.15.4: a Federating Communication Protocol for Time-Sensitive Wireless Sensor Networks

    OpenAIRE

    Koubâa, Anis; Alves, Mário; Tovar, Eduardo

    2006-01-01

    Wireless Sensor Networks (WSNs) have been attracting increasing interests for developing a new generation of embedded systems with great potential for many applications such as surveillance, environment monitoring, emergency medical response and home automation. However, the communication paradigms in WSNs differ from the ones attributed to traditional wireless networks, triggering the need for new communication protocols. In this context, the recently standardised IEEE 802.15....

  19. Generalization of the proposed IEEE standard for floating-point arithmetic

    Energy Technology Data Exchange (ETDEWEB)

    Cody, W.J.

    1982-12-10

    Several years ago the Microprocessor Standards Committee of the IEEE Computer Society established a Floating-Point Working Group to draft a standard binary floating-point arithmetic on 32-bit microprocessors. As that task neared completion, a second working group was established to generalize the proposed binary standard for other radices and wordlengths. We discuss the emerging generalization, its influence on final deliberations on the proposed binary standard, and the implications for numerical computation.

  20. An NTP Stratum-One Server Farm Fed By IEEE-1588

    Science.gov (United States)

    2010-01-01

    synchronized to its Master Clocks via IRIG -B time code on a low- frequency RF distribution system. The availability of Precise Time Protocol (PTP, IEEE...forwarding back to the requestor. The farm NTP servers are synchronized to the USNO Master Clocks using IRIG -B time code. The current standard NTP... IRIG -B and provide memory-mappable BCD time clocks. The standard NTP distribution is augmented with a USNO- developed NTP reference clock driver for