purpose: retinitis pigmentosa (rp) is a hereditary eye disease in human beings. it commences at childhood and continues by nyctalopia and gradual reduction of visual field and ends up by blindness. it may be inherited in three forms of autosomal dominant, autosomal recessive and sex-linked. in this investigation we intend to study rp type as a sex-linked disease and its location on x chromosome...

A number of experiments regarding the placement of instructions, private data and shared data in the Non-Uniform Memory Access multiprocessor, RP3 has been performed. Three Scientific/Mathematical workloads have been used in the experiments, and the results have been modelled in a simple performance model which takes linear contention into consideration. The results indicate that it can very we...

A new species, namely Astioberotha coutreti sp. nov., of the thorny lacewing subfamily Paraberothinae, is described and illustrated from a complete individual preserved in mid-Cretaceous amber Tanai, northern Myanmar. nov. preserves nearly all diagnostic characters this subfamily, differs type species genus owing to fore femur with one long basal spine 34 additional smaller spines; protibia bea...

Falls are a major problem in older adults. Many falls occur because of stumbling. The aim of the present study is to investigate stumbling reactions of older adults and to compare them with young adults. While subjects walked on a treadmill, a rigid obstacle unexpectedly obstructed the forward sway of the foot. In general, older adults used the same movement strategies as young adults ("elevati...

We argue that open N = 2 string theory on spacetime with signature (2, 2), when covariantized with respect to SO(2, 2) and supersymmetrized a la Siegel, becomes equivalent to the topological A model on CP3|4 with branes wrapped on RP3|4. Worldsheet instantons ending on the branes deform the self-dual Yang-Mills to ordinary Yang-Mills. Moreover, we propose that mirror symmetry may explain the re...

R etinitis pigmentosa (RP) is a heterogeneous group of monogenic retinal disorders characterized by progressive rod and then cone photoreceptor degeneration. Although female carriers of mutations in the X-linked genes RP2 and RP3 show asymmetry, cases due to mutations of autosomal genes show a high degree of symmetry between eyes. Patients with unilateral RP have been described, but none of the...

We develop a global twistor correspondence for pseudo-Riemannian conformal structures of signature (++−−) with self-dual Weyl curvature. Near the conformal class of the standard indefinite product metric on S2 × S2, there is an infinitedimensional moduli space of such conformal structures, and each of these has the surprising global property that its null geodesics are all periodic. Each such c...

Despite the identification of severe acute respiratory syndrome-related coronavirus (SARSr-CoV) in Rhinolophus Chinese horseshoe bats (SARSr-Rh-BatCoV) in China, the evolutionary and possible recombination origin of SARSr-CoV remains undetermined. We carried out the first study to investigate the migration pattern and SARSr-Rh-BatCoV genome epidemiology in Chinese horseshoe bats during a 4-year...