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Coding Structure (coding + structure)
Selected AbstractsBlock-based fine granularity scalable video coding with optimized rate allocation for content-aware streamingINTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, Issue 6 2003Yuwen He Abstract This article proposes a novel block-based fine granularity scalable (FGS) video coding structure with optimized rate allocation for content-aware streaming, which is more flexible than MPEG-4 FGS specified in the streaming profile of MPEG-4 standard (IS-14496). In MPEG-4 FGS streaming, rate allocation can only be based on frame because MBs' compressed data are interlaced between bit-planes. However in the proposed coding structure, every MB's data are independent; therefore, streaming server can allocate bits according to content's importance, and the quality of those regions of interest is enhanced selectively with more bits allocated. In this way, the streaming server can have a differentiated delivery strategy to support a personalized streaming service considering user's preference. But the uniform rate allocation of proposed block-based FGS coding will result in a greater loss of coding efficiency than that of MPEG-4 FGS within a quite wide bit-rate range. An optimized and fast rate allocation method according to block's rate-distortion is proposed to solve this critical issue. And the coding efficiency is improved successfully, which can be comparable with MPEG-4 FGS coding and is even better up to 0.5 dB, with some sequences at medium bit-rates. © 2004 Wiley Periodicals, Inc. Int J Imaging Syst Technol 13, 322,330, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ima.10066 [source] Routine and adaptive expert strategies for resolving ICT mediated communication problems in the team settingMEDICAL EDUCATION, Issue 7 2009Lara Varpio Context, The use of information and communication technologies (ICTs) for supporting interprofessional communication is becoming increasingly common in health care. However, little research has explored how ICTs affect interprofessional communication, or how novices are trained to be effective interprofessional ICT users. This study explores the interprofessional communication strategies of nurses and doctors (trainees and experts) when their communications were mediated by a specific ICT: an electronic patient record (EPR). Methods, A total of 72 doctors and nurses participated in this 8-month study on a paediatric in-patient ward. Eighty hours of non-participant observations and 20 semi-structured interviews were conducted. All data were rendered anonymous prior to analysis. Using a constructivist grounded theory approach, one researcher read and analysed all data recursively. As emergent themes were identified, exemplary portions of the data were discussed with three additional researchers to resolve discrepancies and confirm the coding structure. Expertise literatures informed the final analyses. Results, Three interprofessional communication strategies were identified: (i) all participants routinely formulated ,workarounds' to circumvent problematic EPR-mediated communications; (ii) workarounds were classifiable as instances of Abandoning, Forcing or Submitting to the EPR, and (iii) novices learned workaround strategies through an informal curriculum, but they did not learn to manage the interprofessional effects of these workarounds. Conclusions, Trainees relied on workarounds as simplified routines, demonstrating routine expertise. Staff members, demonstrating adaptive expertise, used workarounds as part of a broader network of people and communication tools. Explicit training regarding this network and the ways in which workarounds conceal this network may help trainees develop adaptive expertise. [source] Forming professional identities on the health care team: discursive constructions of the ,other' in the operating roomMEDICAL EDUCATION, Issue 8 2002L Lingard Background, Inter-professional health care teams represent the nucleus of both patient care and the clinical education of novices. Both activities depend upon the,talk' that team members use to interact with one another. This study explored team members' interpretations of tense team communications in the operating room (OR). Methods, The study was conducted using 52 team members divided into 14 focus groups. Team members comprised 13 surgeons, 19 nurses, nine anaesthetists and 11 trainees. Both uni-disciplinary (n = 11) and multi-disciplinary (n = 3) formats were employed. All groups discussed three communication scenarios, derived from prior ethnographic research. Discussions were audio-recorded and transcribed. Using a grounded theory approach, three researchers individually analysed sample transcripts, after which group discussions were held to resolve discrepancies and confirm a coding structure. Using the confirmed code, the complete data set was coded using the ,NVivo' qualitative data analysis software program. Results, There were substantial differences in surgeons', nurses', anaesthetists', and trainees' interpretations of the communication scenarios. Interpretations were accompanied by subjects' depictions of disciplinary roles on the team. Subjects' constructions of other professions' roles, values and motivations were often dissonant with those professions' constructions of themselves. Conclusions, Team members, particularly novices, tend to simplify and distort others' roles and motivations as they interpret tense communication. We suggest that such simplifications may be rhetorical, reflecting professional rivalries on the OR team. In addition, we theorise that novices' echoing of role simplification has implications for their professional identity formation. [source] Emergency Department Sickle Cell Assessment of Needs and Strengths (ED-SCANS), a Focus Group and Decision Support Tool Development ProjectACADEMIC EMERGENCY MEDICINE, Issue 8 2010Paula Tanabe PhD ACADEMIC EMERGENCY MEDICINE 2010; 17:848,858 © 2010 by the Society for Academic Emergency Medicine Abstract Objectives:, A decision support tool may guide emergency clinicians in recognizing assessment, analgesic and overall management, and health service delivery needs for patients with sickle cell disease (SCD) in the emergency department (ED). We aimed to identify data and process elements important in making decisions regarding evaluation and management of adult patients in the ED with painful episodes of SCD. Methods:, Qualitative methods using a series of focus groups and grounded theory were used. Eligible participants included adult clients with SCD and emergency physicians and nurses with a minimum of 1 year of experience providing care to patients with SCD in the ED. Patients were recruited in conjunction with annual SCD meetings, and providers included clinicians who were and were not affiliated with sickle cell centers. Groups were conducted until saturation was reached and included a total of two patient groups, three physician groups, and two nurse groups. Focus groups were held in New York, Durham, Chicago, New Orleans, and Denver. Clinician participants were asked the following three questions to guide the discussion: 1) what information would be important to know about patients with SCD in the ED setting to effectively care for them and help you identify patient analgesic, treatment, and referral needs? 2) What treatment decisions would you make with this information? and 3) What characteristics would a decision support tool need to have to make it meaningful and useful? Client participants were asked the same questions with rewording to reflect what they believed providers should know to provide the best care and what they should do with the information. All focus groups were audiotaped and transcribed. The constant comparative method was used to analyze the data. Two coders independently coded participant responses and identified focal themes based on the key questions. An investigator and assistant independently reviewed the transcripts and met until the final coding structure was determined. Results:, Forty-seven individuals participated (14 persons with SCD, 16 physicians, and 17 nurses) in a total of seven different groups. Two major themes emerged: acute management and health care utilization. Major subthemes included the following: physiologic findings, diagnostics, assessment and treatment of acute painful episodes, and disposition. The most common minor subthemes that emerged included past medical history, presence of a medical home (physician or clinic), individualized analgesic treatment plan for treatment of painful episodes, history of present illness, medical home follow-up available, patient-reported analgesic treatment that works, and availability of analgesic prescription at discharge. Additional important elements in treatment of acute pain episodes included the use of a standard analgesic protocol, need for fluids and nonpharmacologic interventions, and the assessment of typicality of pain presentation. The patients' interpretation of the need for hospital admission also ranked high. Conclusions:, Participants identified several areas that are important in the assessment, management, and disposition decisions that may help guide best practices for SCD patients in the ED setting. [source] Will Systematized Nomenclature of Medicine-Clinical Terms improve our understanding of the disease burden posed by allergic disorders?CLINICAL & EXPERIMENTAL ALLERGY, Issue 11 2007C. R. Simpson Summary Analysis of data collected through the use of high-quality computerized systems is vital if we are to understand the health burden from allergic disease. Coding systems currently used, such as the World Health Organization's International Classification of Diseases and the Read system, have however been criticized as being unduly restrictive and hence inadequate for the detailed coding of allergic problems. Greater granularity of coding can be achieved by using the Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT) system, which will be adopted by several countries including the United States and United Kingdom. Before the introduction of SNOMED-CT, it is important that several issues are resolved, including ensuring that adequate mapping occurs from existing systems, that the SNOMED-CT is trialled before general implementation, and that training is provided for users new to coding as part of their clinical practice. Of particular importance is that the allergy fraternity bring to light any gaps in allergy coding through the creation of a working group to advise the newly formed International Healthcare Terminology Standards Development Organisation. There is also a role for allergy experts, working in conjunction with government agencies and professional bodies, to determine a recommended set of codes, which will obviate some of the inevitable challenges raised by a very fluid coding structure for those wishing to undertake secondary analysis of health care datasets. [source] | ||||||||||