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  • 1
    Book
    Book
    Wormley, Godalming, Surrey : Inst. of Oceanographic Sciences, Deacon Lab.
    Type of Medium: Book
    Pages: 97 S
    Series Statement: Institute of Oceanographic Sciences Deacon Laboratory report 293
    Language: English
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  • 2
    Publication Date: 2021-05-19
    Description: 1] The baroclinic transport of the Antarctic Circumpolar Current (ACC) above 3000 m through Drake Passage is 107.3 ± 10.4 Sv and has been steady between 1975 and 2000. For six hydrographic sections (1993–2000) along the World Ocean Circulation Experiment (WOCE) line SR1b, the baroclinic transport relative to the deepest common level is 136.7 ± 7.8 Sv. The ACC transport is carried in two jets, the Subantarctic Front 53 ± 10 Sv and the Polar Front (PF) 57.5 ± 5.7 Sv. Southward of the ACC the Southern Antarctic Circumpolar Current transports 9.3 ± 2.4 Sv. We observe the PF at two latitudes separated by 90 km. This bimodal distribution is related to changes in the circulation and properties of Antarctic Bottom Water. Three realizations of the instantaneous velocity field were obtained with lowered ADCPs. From these observations we obtain near‐bottom reference velocities for transport calculations. Net transport due to these reference velocities ranges from −28 to 43 Sv, consistent with previous estimates of variability. The transport in density layers shows systematic variations due to seasonal heating in near‐surface layers. Volume transport‐weighted mean temperatures vary by 0.40°C from spring to summer; a seasonal variation in heat flux of about 0.22 PW. Finally, we review a series of papers from the International Southern Ocean Studies Program. The average yearlong absolute transport is 134 Sv, and the standard deviation of the average is 11.2 Sv; the error of the average transport is 15 to 27 Sv. We emphasize that baroclinic variability is an important contribution to net variability in the ACC.
    Description: Published
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.80-84
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  • 3
    Publication Date: 2021-05-19
    Description: Abstract Attitude (pitch, roll, and heading) variations of the platform on which acoustic Doppler current profilers (ADCPs) are mounted will affect the measurements of water velocity using ADCPs. The major correction required to the velocity vector is for heading. Here the authors concentrate on the magnitude of errors due to pitch and roll biases. Data used in this study were obtained using a 150-kHz RD Instruments ADCP fitted to the RRS James Clark Ross. In late November 1994 a hydrographic section was made across Drake Passage in the Southern Ocean along the World Ocean Circulation Experiment (WOCE) Special Repeat 1 section. The annual occupation of this line is a major contribution by the United Kingdom to the WOCE. A key element of the program is to determine the volume flux of the Antarctic Circumpolar Current as it flows through Drake Passage. One method of obtaining the total volume flux is by referencing relative geostrophic velocity profiles to the absolute ADCP velocity profiles, thereby obtain...
    Description: Published
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.96-106
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  • 4
    Publication Date: 2015-11-09
    Type: Article , NonPeerReviewed
    Format: text
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  • 5
    Publication Date: 2014-08-21
    Description: Objective To examine the process of case finding for depression in people with diabetes and coronary heart disease within the context of a pay-for-performance scheme. Design Ethnographic study drawing on observations of practice routines and consultations, debriefing interviews with staff and patients and review of patient records. Setting General practices in Leeds, UK. Participants 12 purposively sampled practices with a total of 119 staff; 63 consultation observations and 57 patient interviews. Main outcome measure Audio recorded consultations and interviews with patients and healthcare professionals along with observation field notes were thematically analysed. We assessed outcomes of case finding from patient records. Results Case finding exacerbated the discordance between patient and professional agendas, the latter already dominated by the tightly structured and time-limited nature of chronic illness reviews. Professional beliefs and abilities affected how case finding was undertaken; there was uncertainty about how to ask the questions, particularly among nursing staff. Professionals were often wary of opening an emotional ‘can of worms’. Subsequently, patient responses potentially suggesting emotional problems could be prematurely shut down by professionals. Patients did not understand why they were asked questions about depression. This sometimes led to defensive or even defiant answers to case finding. Follow-up of patients highlighted inconsistent systems and lines of communication for dealing with positive results on case finding. Conclusions Case finding does not fit naturally within consultations; both professional and patient reactions somewhat subverted the process recommended by national guidance. Quality improvement strategies will need to take account of our results in two ways. First, despite their apparent simplicity, the case finding questions are not consultation-friendly and acceptable alternative ways to raise the issue of depression need to be supported. Second, case finding needs to operate within structured pathways which can be accommodated within available systems and resources.
    Keywords: Open access, Cardiovascular medicine, General practice / Family practice, Health policy, Mental health, Patient-centred medicine, Diabetes and Endocrinology
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 6
    Publication Date: 2014-08-22
    Description: Objective To evaluate the effects of Quality and Outcomes Framework (QOF) incentivised case finding for depression on diagnosis and treatment in targeted and non-targeted long-term conditions. Design Interrupted time series analysis. Setting General practices in Leeds, UK. Participants 65 (58%) of 112 general practices shared data on 37 229 patients with diabetes and coronary heart disease targeted by case finding incentives, and 101 008 patients with four other long-term conditions not targeted (hypertension, epilepsy, chronic obstructive pulmonary disease and asthma). Intervention Incentivised case finding for depression using two standard screening questions. Main outcome measures Clinical codes indicating new depression-related diagnoses and new prescriptions of antidepressants. We extracted routinely recorded data from February 2002 through April 2012. The number of new diagnoses and prescriptions for those on registers was modelled with a binomial regression, which provided the strength of associations between time periods and their rates. Results New diagnoses of depression increased from 21 to 94/100 000 per month in targeted patients between the periods 2002–2004 and 2007–2011 (OR 2.09; 1.92 to 2.27). The rate increased from 27 to 77/100 000 per month in non-targeted patients (OR 1.53; 1.46 to 1.62). The slopes in prescribing for both groups flattened to zero immediately after QOF was introduced but before incentivised case finding (p〈0.01 for both). Antidepressant prescribing in targeted patients returned to the pre-QOF secular upward trend (Wald test for equivalence of slope, z=0.73, p=0.47); the slope was less steep for non-targeted patients (z=–4.14, p〈0.01). Conclusions Incentivised case finding increased new depression-related diagnoses. The establishment of QOF disrupted rising trends in new prescriptions of antidepressants, which resumed following the introduction of incentivised case finding. Prescribing trends are of concern given that they may include people with mild-to-moderate depression unlikely to respond to such treatment.
    Keywords: Open access, General practice / Family practice, Mental health
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 7
    Publication Date: 2016-04-19
    Description: Sinyor and colleagues lend qualified support to the US Preventive Services Task Force’s recommendation of universal screening for depression.1 2 The authors highlight the lack of recommendations on...
    Keywords: Patients, Epidemiologic studies, General practice / family medicine, Screening (epidemiology), Screening (public health)
    Topics: Medicine
    Published by BMJ Publishing Group
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