11,405 research outputs found

    Terlipressin or norepinephrine in septic shock: do we have the answer?

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    Comment on Terlipressin versus norepinephrine as infusion in patients with septic shock: a multicentre, randomised, double-blinded trial. [Intensive Care Med. 2018

    Understanding customers' holistic perception of switches in automotive human–machine interfaces

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    For successful new product development, it is necessary to understand the customers' holistic experience of the product beyond traditional task completion, and acceptance measures. This paper describes research in which ninety-eight UK owners of luxury saloons assessed the feel of push-switches in five luxury saloon cars both in context (in-car) and out of context (on a bench). A combination of hedonic data (i.e. a measure of ‘liking’), qualitative data and semantic differential data was collected. It was found that customers are clearly able to differentiate between switches based on the degree of liking for the samples' perceived haptic qualities, and that the assessment environment had a statistically significant effect, but that it was not universal. A factor analysis has shown that perceived characteristics of switch haptics can be explained by three independent factors defined as ‘Image’, ‘Build Quality’, and ‘Clickiness’. Preliminary steps have also been taken towards identifying whether existing theoretical frameworks for user experience may be applicable to automotive human–machine interfaces

    Customer perception of switch-feel in luxury sports utility vehicles

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    Successful new product introduction requires that product characteristics relate to the customer on functional, emotional, aesthetic and cultural levels. As a part of research into automotive human machine interfaces (HMI), this paper describes holistic customer research carried out to investigate how the haptics of switches in luxury sports utility vehicles (SUVs) are perceived by customers. The application of these techniques, including an initial proposal for objective specifications, is addressed within the broader new product introduction context, and benefits described. One-hundred and one customers of SUVs assessed the feel of automotive push switches, completing the tasks both in, and out of vehicles to investigate the effect of context. Using the semantic differential technique, hedonic testing, and content analysis of customers’ verbatim comments, a holistic picture has been built up of what influences the haptic experience. It was found that customers were able to partially discriminate differences in switch-feel, alongside considerations of visual appearance, image, and usability. Three factors named ‘Affective’, ‘Robustness and Precision’, and ‘Silkiness’ explained 61% of the variance in a principle components analysis. Correlations of the factors with acceptance scores were 0.505, 0.371, and 0.168, respectively

    Investigating the Features of the M170 in Congenital Prosopagnosia

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    Face perception generates specific neural activity as early as 170 ms post-stimulus onset, termed the M170 when measured with Magnetoencephalography (MEG). We examined the M170 in six people with congenital prosopagnosia (CP) and 11 typical controls. Previous research indicates that there are two neural generators for the M170 (one within the right lateral occipital area - rLO and one within the right fusiform gyrus - rFG), and in the current study we explored whether these sources reflect the processing of different types of information. Individuals with CP showed face-selective M170 responses within the rLO and right rFG, which did not differ in magnitude to those of the controls. To examine possible links between neural activity and behavior we correlated the CPs' MEG activity generated within rLO and rFG with their face perception skills. The rLO-M170 correlated with holistic/configural face processing, whereas the rFG-M170 correlated with featural processing. Hence, the results of our study demonstrate that individuals with CP can show an M170 that is within the normal range, and that the M170 in the rLO and rFG are involved in different aspects of face processing

    Quiet eye vs. noisy brain: The eye like the brain is always active – comment on Vickers

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    Investigating soil property and quality changes from samples submitted to the LSU AgCenter Soil Testing Laboratory

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    The primary purpose of the study is to investigate the trends in soil nutrient levels from soil samples submitted to the LSU AgCenter soil testing and plant analysis laboratory during 2008 to 2012. This study indicates the trend for soil pH, soil phosphorus and soil potassium for corn, cotton, rice, grain sorghum, soybeans, and sugarcane. These six crops were analyzed in this study because of the economic significance to the Louisiana agricultural industry. The trend in soil nutrients studied were generally within the recommended levels for sustainability and environmental stewardship. This study describes the trends for soil pH, soil phosphorus and soil potassium for Louisiana soils during the years 2008 – 2012. The value of this paper lies in calling attention to broad nutrient needs and challenges faced by the crop producers. Finally, the study findings demonstrate the importance of monitoring soil nutrient trends and environmental stewardship

    Bone-to-bone and implant-to-bone impingement : a novel graphical representation for hip replacement planning

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    Bone-to-bone impingement (BTBI) and implant-to-bone impingement (ITBI) risk assessment is generally performed intra-operatively by surgeons, which is entirely subjective and qualitative, and therefore, lead to sub-optimal results and recurrent dislocation in some cases. Therefore, a method was developed for identifying subject-specific BTBI and ITBI, and subsequently, visualising the impingement area on native bone anatomy to highlight where prominent bone should be resected. Activity definitions and subject-specific bone geometries, with planned implants were used as inputs for the method. The ITBI and BTBI boundary and area were automatically identified using ray intersection and region growing algorithm respectively to retain the same ‘conical clearance angle’ obtained to avoid prosthetic impingement (PI). The ITBI and BTBI area was then presented with different colours to highlight the risk of impingement, and importance of resection. A clinical study with five patients after 2 years of THA was performed to validate the method. The results supported the study hypothesis, in that the predicted highest risk area (red coloured zone) was completely/majorly resected during the surgery. Therefore, this method could potentially be used to examine the effect of different pre-operative plans and hip motions on BTBI, ITBI, and PI, and to guide bony resection during THA surgery

    The role of cervical spine range of motion in recovery from whiplash associated disorders

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    This thesis investigates the role of cervical spine Range of Motion in the recovery from Whiplash Associated Disorders. In clinical practice, Health Care Professionals attach value to measurements of cervical spine Range of Motion for diagnostic, prognostic and treatment evaluation purposes. A systematic literature review found conflicting evidence as to whether cervical spine Range of Motion was a prognostic factor following a whiplash injury. Greater understanding of prognostic factors such as this may facilitate improvements in patient management. A second systematic literature review investigated the reliability and validity of methods for measuring cervical spine Range of Motion. The Cervical Range Of Motion (CROM) device was found to be the most rigorously tested and clinimetrically promising method and was subsequently investigated for intra- and inter-observer reliability in a group of whiplashinjured individuals and found to be substantially reliable. The CROM device was utilised in a longitudinal cohort study of 599 whiplash-injured patients to investigate the prognostic value of cervical spine Range of Motion for neck painrelated disability and patient-reported recovery at short, medium and long-term follow-up. A patient-reported version of cervical spine Range of Motion was also evaluated as a prognostic factor. Although useful for explaining disability at the time of measurement, active, passive and patient-reported forms of cervical spine Range of Motion were not significant prognostic factors for poor outcome when other physical and psychosocial factors were accounted for. The clinical implication of this research is that if patients are experiencing reduced cervical spine Range of Motion a few weeks after their whiplash injury they will not necessarily have a poor outcome in the longer term as is commonly believed at present
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