1,917 research outputs found
Does the LigaSure Vessel Sealing System Provide Benefit in Mortality in Regards to Hepatic Resections?
OBJECTIVE: The objective of this selective EBM review is to determine whether or not using the LigaSure device provides any benefit in morality in patients undergoing hepatic resection surgery.
STUDY DESIGN: Review of three English language randomized control trials published in 2007, 2009 and 2012.
DATA SOURCES: Data sources obtained for this review primary studies published in peerreviewed journals, found using PubMed.
OUTCOMES MEASURED: Patient mortality, defined as death within 30 days of the surgical procedure.
RESULTS: The study done by Doklestic and et al had 3 patient mortalities occur. The deaths occurred on post op days three, four and nine and were due to pulmonary embolism, acute myocardial infarction and heart failure, respectively.8 Zero mortalities occurred in the remaining two studies.9,10
CONCLUSIONS: The results of the studies showed that LigaSure did not provide a benefit in mortality compared to the clamp crushing method, the cavitron ultrasonic surgical aspirator (CUSA) method and to ultrasonic shears
Instability of (1+1) de sitter space in the presence of interacting fields
Instabilities of two dimensional (1+1) de Sitter space induced by interacting
fields are studied. As for the case of flat Minkowski space, several
interacting fermion models can be translated into free boson ones and vice
versa. It is found that interacting fermion theories do not lead to any
instabilities, while the interacting bosonic sine-Gordon model does lead to a
breakdown of de Sitter symmetry and to the vanishing of the vacuum expectation
value of the S matrix.Comment: 7 page
Numerical comparison between a Gyrofluid and Gyrokinetic model investigating collisionless magnetic reconnection
The first detailed comparison between gyrokinetic and gyrofluid simulations
of collisionless magnetic reconnection has been carried out. Both the linear
and nonlinear evolution of the collisionless tearing mode have been analyzed.
In the linear regime, we have found a good agreement between the two approaches
over the whole spectrum of linearly unstable wave numbers, both in the drift
kinetic limit and for finite ion temperature. Nonlinearly, focusing on the
small- regime, with indicating the standard tearing
stability parameter, we have compared relevant observables such as the
evolution and saturation of the island width, as well as the island oscillation
frequency in the saturated phase.The results are basically the same, with small
discrepancies only in the value of the saturated island width for moderately
high values of . Therefore, in the regimes investigated here, the
gyrofluid approach can describe the collisionless reconnection process as well
as the more complete gyrokinetic model.Comment: Accepted for publication on Physics of Plasma
âIt gave me something big in my life to wonder and think about which took over the spaceââŚâand not MSâ: Managing well-being in multiple sclerosis through art-making
This is the author's accepted manuscript. The final published article is available from the link below. Copyright @ 2014 Informa UK Ltd.Background and aim: Individuals living with Multiple Sclerosis (MS) often face progressive loss of function, uncertainty and disruption to self-image and valued roles. Previous studies show that creative self-expression is valued by some people living with long-term illness, yet its meaning for people living with MS is unclear. This research study explored the meanings of leisure-based visual art-making for people living with MS. Method: This qualitative study followed guidelines for Interpretative Phenomenological Analysis (IPA). Single semi-structured interviews were conducted with five adults (2 males; 3 females; 40â65 years), recruited from MS Ireland. Findings: Participants valued art-making for contributing to a more satisfying way of life; for filling occupational voids and using time well. Deep immersion offered respite from worry about illness. Creative classes offered social camaraderie and opportunities for learning and development. Art-making processes and products were highly affirmative, increasing emotional well-being and promoting self-worth. Most felt that they expressed valued aspects of self through their art. Art-making appeared to assist with identity maintenance, accommodating functional losses associated with MS whilst opening ânew doorsâ. Conclusion: Art-making offered a multi-faceted means of supporting identity and increasing fulfilment in lives that were restricted in many ways by MS
Superlinear Scaling for Innovation in Cities
Superlinear scaling in cities, which appears in sociological quantities such
as economic productivity and creative output relative to urban population size,
has been observed but not been given a satisfactory theoretical explanation.
Here we provide a network model for the superlinear relationship between
population size and innovation found in cities, with a reasonable range for the
exponent.Comment: 5 pages, 5 figures, 1 table, submitted to Phys. Rev. E; references
corrected; figures corrected, references and brief discussion adde
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