17,855 research outputs found
Building up spacetime with quantum entanglement
In this essay, we argue that the emergence of classically connected
spacetimes is intimately related to the quantum entanglement of degrees of
freedom in a non-perturbative description of quantum gravity. Disentangling the
degrees of freedom associated with two regions of spacetime results in these
regions pulling apart and pinching off from each other in a way that can be
quantified by standard measures of entanglement.Comment: Gravity Research Foundation essay, 7 pages, LaTeX, 5 figure
Renal transplantation at the university of Colorado
From March 1962 to April 1963, 118 patients were treated with renal transplantation, 3 with kidneys from identical twins, 9 with cadaveric homografts, and 106 with homografts from volunteer donors. Sixty-two of the patients are still alive after nine months to almost five years. The only completely satisfactory group was that of the identical twin recipients. The results after homotransplantation have not materially improved during this time despite the acquisition of increased experience, adjustments of timing and dosage of azathioprine and prednisone, and attempts to identify biologically suitable donors in advance of operation by tissue typing. It is suggested that an impasse has been reached, beyond which further reduction in mortality and morbidity will depend primarily upon the effective application of new immunosuppressive techniques. © 1967 by The Williams and Wilkins Co
Implication of the overlap representation for modelling generalized parton distributions
Based on a field theoretically inspired model of light-cone wave functions,
we derive valence-like generalized parton distributions and their double
distributions from the wave function overlap in the parton number conserved
s-channel. The parton number changing contributions in the t-channel are
restored from duality. In our construction constraints of positivity and
polynomiality are simultaneously satisfied and it also implies a model
dependent relation between generalized parton distributions and transverse
momentum dependent parton distribution functions. The model predicts that the
t-behavior of resulting hadronic amplitudes depends on the Bjorken variable
x_Bj. We also propose an improved ansatz for double distributions that embeds
this property.Comment: 15 pages, 8 eps figure
Laboratory criteria for antiphospholipid syndrome : communication from the SSC of the ISTH
Clinical characterization of thoracolumbar and lumbar intervertebral disk extrusions in English Cocker Spaniels
The clinical use of antilymphocyte globulin in renal homotransplantation
Twenty patients were treated with antilymphocyte globulin (ALG) which was prepared from the serum of immunized horses. The ALG was used as an adjuvant to azathioprine and prednisone and its use limited to 4 months. The surviving patients are now 1 to 7 months postoperative. There was 1 death, the consequence of a technical accident. The function in the remaining 19 patients is excellent, despite reduced doses of azathioprine and especially prednisone. Biopsies were obtained in the first 8 consecutive cases from 108 to 145 days after operation. There was no evidence in the specimens of either Masugi-like or serum sickness nephritis. © 1967 by The Williams and Wilkins Co
Electromagnetic Form Factors of the Nucleon and Compton Scattering
We review the experimental and theoretical status of elastic electron
scattering and elastic low-energy photon scattering (with both real and virtual
photons) from the nucleon. As a consequence of new experimental facilities and
new theoretical insights, these subjects are advancing with unprecedented
precision. These reactions provide many important insights into the spatial
distributions and correlations of quarks in the nucleon.Comment: 47 pages, 18 figures, includes corrections and updates to published
manuscrip
When a small self means manageable obstacles: Spontaneous self-distancing predicts divergent effects of awe during a subsequent performance stressor
The emotion of awe occurs when one feels small relative to something vaster than the self; it leads to benefits such as care for others. However, because awe elicits the experience of a “small self,” it is unclear to what extent awe positively versus negatively affects responses to subsequent stressors. If personal obstacles seem trivial in comparison to awe-inspiring stimuli, stressors should seem either manageable or unimportant, but if one's capabilities seem comparatively insignificant, stressors should seem unmanageable. We hypothesized that awe would have a generally positive effect on responses during a subsequent performance stressor, but that this would further depend on whether people tended to spontaneously take on a self-distanced versus self-immersed perspective. In the face of awe, focusing less on the self (self-distanced perspective) should make obstacles in particular seem trivial, whereas focusing more on the self (self-immersed) should lead one's capabilities to seem insignificant. Using the biopsychosocial model of challenge/threat, we found that spontaneous self-distancing significantly moderated awe's effects on responses during a subsequent performance stressor (speech task): For participants who self-distanced, the awe condition led to cardiovascular responses consistent with greater challenge than the neutral control condition (reflecting evaluating the stressor as more manageable); for participants who self-immersed, awe predicted relative threat (less manageable stressor). There was no support for awe making people care less about the stressor (as reflected in cardiovascular responses consistent with task engagement). This offers insight into how awe can have divergent effects on people's experiences during performance stressors
Peroxisomes in intestinal and gallbladder epithelial cells of the stickleback, Gasterosteus aculeatus L. (Teleostei)
The occurrence of microbodies in the epithelial cells of the intestine and gallbladder of the stickleback, Gasterosteus aculeatus L., is described. In the intestine the organelles are predominantly located in the apical and perinuclear zone of the cells and may contain small crystalline cores. In gallbladder epithelial cells the microbodies are distributed randomly. The latter organdies are characterized by the presence of large crystalloids. Cytochemical and biochemical experiments show that catalase and D-amino acid oxidase are main matrix components of the microbodies in both the intestinal and gallbladder epithelia. These organelles therefore are considered peroxisomes. In addition, in intestinal mucosa but not in gallbladder epithelium a low activity of palmitoyl CoA oxidase was detected biochemically. Urate oxidase and L-α hydroxy acid oxidase activities could not be demonstrated.
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