310,762 research outputs found
UK back pain exercise and manipulation (UK BEAM) trial - national randomised trial of physical treatments for back pain in primary care: objectives, design and interventions
No full textLow back pain has major health and social implications. Although there have been
many randomised controlled trials of manipulation and exercise for the management of low back
pain, the role of these two treatments in its routine management remains unclear. A previous trial
comparing private chiropractic treatment with National Health Service (NHS) outpatient
treatment, which found a benefit from chiropractic treatment, has been criticised because it did not
take treatment location into account. There are data to suggest that general exercise programmes
may have beneficial effects on low back pain. The UK Medical Research Council (MRC) has funded
this major trial of physical treatments for back pain, based in primary care. It aims to establish if,
when added to best care in general practice, a defined package of spinal manipulation and a defined
programme of exercise classes (Back to Fitness) improve participant-assessed outcomes.
Additionally the trial compares outcomes between participants receiving the spinal manipulation in
NHS premises and in private premises
Review of “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis
No full textReview of C. J. S. Hayward, “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis (Wheaton, Illinois: C. J. S. Hayward Publications, 2000-19). 381 pages. $49.99. ISBN 9781794669956
Discogenic low back pain : lumbar spondylodesis revisited
No full textNeurosurgeon deals with chronic low back pain patients almost daily. Most of these patients still have complaints of low back pain despite many different previous therapies. Surgical treatment is only to be considered in few cases of chronic low back pain sufferers. From this large group of chronic low back pain patients we have tried to select a small group of patients who might benefit fiom spondylodesis. This thesis is about the selection and treatment of this patient group. Their assumed source of pain and the results of surgical treatment will also be discussed. ...
Zie: Summary
Hydrogen sensors based on Pt-AlGaN/GaN back-to-back Schottky diode
No full textIn this paper, platinum (Pt) with a thickness of 45 nm was sputtered on the surface of AlGaN/GaN heterostructure to form the Schottky contact and the back-to-back Schottky diodes were characterized for H-2 sensing at room temperature. Both the forward and reverse current of the devices increased with exposure to H-2 gas, which was attributed to Schottky barrier height reduction caused by hydrogen absorption in the catalytic metals. A shift of 0.7 V at 297 K was obtained at a fixed forward current of 0.1 mA after switching from N-2 to 40% H-2 in N-2. The sensor's responses under different concentrations from 2500 ppm H-2 to 40% H-2 in N-2 at 297 K were investigated. Time response of the sensor at a fixed bias of 1 V was given. Finally, the decrease of the Schottky barrier height and the sensitivity of the sensor were calculated. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Ground-State and Excited-State C⋮C Stretching Frequencies of Dimetallapolyyne Redox Congeners. Direct Evidence for Metal→Alkynyl π-Back-Bonding
No full textParamagnetic
[K(crypt-222)][Mo2(C⋮CSiMe3)4(PMe3)4] ([K(crypt-222)]1) is
prepared by one-electron
reduction of
Mo2(C⋮CSiMe3)4(PMe3)4
(1) by K(C10H8) in
the presence of crypt-222. The ν(C⋮C) frequencies for
1
and [K(crypt-222)]1 in their ground states and δ
→ δ*
electronic excited states are controlled by the occupancy
of the δ(M2) and δ*(M2) orbitals,
lying in the order 1
(δ2) > 1* (δ1δ*1)
> [K(crypt-222)]1
(δ2δ*1) > [K(crypt-222)]1* (δ1δ*2); this order
indicates that M→C⋮CSiMe3
π-back-bonding is of increasing importance across this
series
Decoupled front/back dielectric textures for flat ultra-thin c-Si solar cells
No full textThe optical analysis of optically-textured and electrically-flat ultra-thin crystalline silicon (c-Si) slabs is presented. These slabs were endowed with decoupled front titanium-dioxide (TiO2) / back silicon-dioxide (SiO2) dielectric textures and were studied as function of two types of back reflectors: standard silver (Ag) and dielectric modulated distributed Bragg reflector (MDBR). The optical performance of such systems was compared to that of state-of-the-art flat c-Si slabs endowed with so-called front Mie resonators and to those of similar optical systems still endowed with the same back reflectors and decoupled front/back texturing but based on textured c-Si and dielectric coatings (front TiO2 and back SiO2). Our optimized front dielectric textured design on 2-µm thick flat c-Si slab with MDBR resulted in more photo-generated current density in c-Si with respect to the same optical system but featuring state-of-the-art Mie resonators ( + 6.4%), mainly due to an improved light in-coupling between 400 and 700 nm and light scattering between 700 and 1050 nm. On the other hand, the adoption of textured dielectric layers resulted in less photo-generated current density in c-Si up to −20.6% with respect to textured c-Si, depending on the type of back reflector taken into account
Synthesis of the Marine Alkaloid Cylindricine C and Serendipitous Synthesis of its 2,13-Di-epi Stereoisomer
No full textThis data set comprises the Supporting Information that accompanies our article to be published in the Journal of Organic Chemistry. It contains NMR spectra, x-ray crystallographic data and molecular modeling data on key compounds in the article
Conservative management of back pain: A literature update
No full textMost adults suffer from low back pain (LBP) at some time in their lifetime. The resulting medical costs and workrelated productivity losses make LBP one of the most expensive ailments to our society today.1 In the military, LBP is one of the largest detriments to Soldier health and mission readiness. Back disorders are among the most common causes of hospitalization, ambulatory medical visits, and restricted duty days in the U.S. Armed Forces.2 The high cost, along with the lack of consistency of medical treatment for LBP, has resulted in the creation and implementation of clinical practice guidelines (CPG) for the management and treatment of LBP around the world
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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