1,636 research outputs found
SUB-FIELDS AND COUNTRIES IN THE LITERATURE OF GOUT: AN ANALYSIS
This paper presents an analysis of Sub-Fields and Countries in the literature of Gout using bibliometric techniques. The literature covered in the database for the period 2008-2017 was considered. It shows that there is a growth of literature in the subject of study by year after year. 40.44% records were covered by Journal Article. 51 journals were needed to supply one-third of the cited records for zone-1. However, 223 journals were required to produce the second grouping of records in Zone-2, and 725 journals to yield the records that constitute Zone-3. Most frequently cited primary journals were General Medicine in the field of Gout with 40.51%. The United States is dominating the first position with 93 primary journals, England is in the second position contains 59 primary journals and Germany is in the third position contains 19 primary journals. The data reveals that publications on ‘General Medicine’ have resulted in a higher number of primary journals publications followed by Rheumatology, Pharmacology, Orthopedics, and Biochemistry. There were high priorities in 11 sub-fields in the USA followed by 10 in England and 8 in Germany. In other countries, the high priorities range from one discipline to five disciplines. 274 primary journals were identified in the field of Gout literature
Hypocholesteremic effect of phenoxybenzamine (Dibenzyline), an adrenergic blocking agent: experimental studies with monkeys and human volunteers
The effect of an orally effective adrenergic blocking agent, Dibenzyline, on serum cholesterol levels was studied in human subjects and in monkeys on high-fat diets. In addition, the effect of the phenoxyethyl analogue of Dibenzyline, G-D 131, was also investigated in monkeys.
The studies showed that the increase in serum cholesterol level brought about by a high-fat diet in monkeys could be considerably reduced by supplementation with Dibenzyline. This hypocholesteremic action was also observed with the analogue of Dibenzyline, G-D 131, which does not possess the adrenergic blocking property. It appears, therefore, that the hypocholesteremic action of Dibenzyline is independent of its adrenergic blocking activity. When a high-fat diet which also contained a high amount of cholesterol was used, Dibenzyline retarded the increase in serum cholesterol of monkeys for a considerable length of time.
Administration of Dibenzyline, 10 mg. daily for 11 days, brought about a fall in serum cholesterol in two of the three human subjects and arrested the further increase in serum cholesterol in the third subject on a high-butterfat diet. All the subjects showed increased fecal elimination of cholic and dihydroxycholanic acids during the Dibenzyline-supplemented period, suggesting that the hypocholesteremic effect of the drug is at least partly mediated through increased elimination of cholesterol as bile acids
Quantum Spins and Quasiperiodicity: a real space renormalization group approach
We study the antiferromagnetic spin-1/2 Heisenberg model on a two-dimensional
bipartite quasiperiodic structure, the octagonal tiling -- the aperiodic
equivalent of the square lattice for periodic systems.
An approximate block spin renormalization scheme is described for this
problem. The ground state energy and local staggered magnetizations for this
system are calculated, and compared with the results of a recent Quantum Monte
Carlo calculation for the tiling. It is conjectured that the ground state
energy is exactly equal to that of the quantum antiferromagnet on the square
lattice.Comment: To appear in Physical Review Letter
Quantum theory of magnetic electron lenses based on the Dirac equation
A quantum theory of magnetic electron lenses based on a convenient formulation of the Dirac theory is outlined. It is shown that the passage from the conventional scalar theory to the spinor theory can be accomplished through a simple algebraic rule in analogy with the passage from scalar to vector light optics
Throughput Optimal Scheduling Over Time-Varying Channels in the Presence of Heavy-Tailed Traffic
We study the problem of scheduling over time varying links in a network that serves both heavy-tailed and light tailed traffic. We consider a system consisting of two parallel queues, served by a single server. One of the queues receives heavy-tailed traffic (the heavy queue), and the other receives light-tailed traffic (the light queue). The queues are connected to the server through time-varying ON/OFF links, which model fading wireless channels. We first show that the policy that gives complete priority to the light-tailed traffic guarantees the best possible tail behavior of both queue backlog distributions, whenever the queues are stable. However, the priority policy is not throughput maximizing, and can cause undesirable instability effects in the heavy queue. Next, we study the class of throughput optimal max-weight-α scheduling policies. We discover a threshold phenomenon, and show that the steady state light queue backlog distribution is heavy-tailed for arrival rates above a threshold value, and light-tailed otherwise. We also obtain the exact tail coefficient of the light queue backlog distribution under max-weight-α scheduling. Finally, we study a log-max-weight scheduling policy, which is throughput optimal, and ensures that the light queue backlog distribution is light-tailed.National Science Foundation (U.S.) (Grant CNS-1217048)National Science Foundation (U.S.) (Grant CNS-0915988)National Science Foundation (U.S.) (CMMI-1234062)United States. Army Research Office. Multidisciplinary University Research Initiative (Grant W911NF-08-1-0238
Effect of the mode of feeding of fats on serum cholesterol levels and plasma fibrinolytic activity of monkeys
The effects of "continuous" and "intermittent" feeding of a high fat diet to two groups of monkeys have been compared. Although the food intake was nearly the same in both groups, body weight was higher in animals fed intermittently that in those fed continuously at the end of the experimental period. This difference, however, was not statistically significant.
Serum cholesterol concentration was significantly higher and plasma fibrinolytic activity significantly lower in the intermittently fed group than in the continuously fed group. The results indicate the importance of the mode of distribution of fat in the daily diet
Does The Uncertainty Relation Determine The Quantum State?
The example of nonpositive trace-class Hermitian operator for which
Robertson-Schroedinger uncertainty relation is fulfilled is presented. The
partial scaling criterion of separability of multimode continuous variable
system is discussed in the context of using nonpositive maps of density
matrices.Comment: 11 pages, to be submitted to Physics Letters
A conjectured scenario for order-parameter fluctuations in spin glasses
We study order-parameter fluctuations (OPF) in disordered systems by
considering the behavior of some recently introduced paramaters which
have proven very useful to locate phase transitions. We prove that both
parameters G (for disconnected overlap disorder averages) and (for
connected disorder averages) take the respective universal values 1/3 and 13/31
in the limit for any {\em finite} volume provided the ground state is
{\em unique} and there is no gap in the ground state local-field distributions,
conditions which are met in generic spin-glass models with continuous couplings
and no gap at zero coupling. This makes ideal parameters to locate
phase transitions in disordered systems much alike the Binder cumulant is for
ordered systems. We check our results by exactly computing OPF in a simple
example of uncoupled spins in the presence of random fields and the
one-dimensional Ising spin glass. At finite temperatures, we discuss in which
conditions the value 1/3 for G may be recovered by conjecturing different
scenarios depending on whether OPF are finite or vanish in the infinite-volume
limit. In particular, we discuss replica equivalence and its natural
consequence when OPF are finite. As an example of
a model where OPF vanish and replica equivalence does not give information
about G we study the Sherrington-Kirkpatrick spherical spin-glass model by
doing numerical simulations for small sizes. Again we find results compatible
with G=1/3 in the spin-glass phase.Comment: 18 pages, 9 postscript figure
New connection formulae for the q-orthogonal polynomials via a series expansion of the q-exponential
Using a realization of the q-exponential function as an infinite
multiplicative sereis of the ordinary exponential functions we obtain new
nonlinear connection formulae of the q-orthogonal polynomials such as
q-Hermite, q-Laguerre and q-Gegenbauer polynomials in terms of their respective
classical analogs.Comment: 14 page
Energy level statistics of electrons in a 2D quasicrystal
A numerical study is made of the spectra of a tight-binding hamiltonian on
square approximants of the quasiperiodic octagonal tiling. Tilings may be pure
or random, with different degrees of phason disorder considered. The level
statistics for the randomized tilings follow the predictions of random matrix
theory, while for the perfect tilings a new type of level statistics is found.
In this case, the first-, second- level spacing distributions are well
described by lognormal laws with power law tails for large spacing. In
addition, level spacing properties being related to properties of the density
of states, the latter quantity is studied and the multifractal character of the
spectral measure is exhibited.Comment: 9 pages including references and figure captions, 6 figures available
upon request, LATEX, report-number els
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