561 research outputs found
Accretion of Solid Materials onto Circumplanetary Disks from Protoplanetary Disks
We investigate accretion of solid materials onto circumplanetary disks from
heliocentric orbits rotating in protoplanetary disks, which is a key process
for the formation of regular satellite systems. In the late stage of
gas-capturing phase of giant planet formation, the accreting gas from
protoplanetary disks forms circumplanetary disks. Since the accretion flow
toward the circumplanetary disks affects the particle motion through gas drag
force, we use hydrodynamic simulation data for the gas drag term to calculate
the motion of solid materials. We consider wide range of size for the solid
particles (-m), and find that the accretion efficiency of the
solid particles peaks around 10m-sized particles because energy dissipation of
drag with circum-planetary disk gas in this size regime is most effective. The
efficiency for particles larger than 10m size becomes lower because gas drag
becomes less effective. For particles smaller than 10m, the efficiency is lower
because the particles are strongly coupled with the back-ground gas flow, which
prevent particles from accretion. We also find that the distance from the
planet where the particles are captured by the circumplanetary disks is in a
narrow range and well described as a function of the particle size.Comment: 12 pages, 11 figures, accepted for publication in Ap
A second consensus sequence of ATP-requiring proteins resides in the 21-kDa C-terminal segment of myosin subfragment 1
AbstractPrevious comparisons of sequence homologies of ATP-requiring enzymes have defined three consensus sequences which appear to be involved in the binding of the nucleotide. One of these was identified in the N-terminal 27-kDa segment of the myosin heavy chain but the other two sequences have not hitherto been located in myosin. The present paper proposes that one of these other two consensus sequences is in the 21-kDa C-terminal portion of S1 and that it may contribute to the ATP binding domain
Clinical and psychopathological characteristics and social functioning of patients with hallucinatory-paranoid disorders in moderate vascular dementia.
The relevance of the study is determined by a high prevalence of dementia, significant economic costs of treatment, negative consequences in the form of disability and decrease in the quality of social functioning. The aim of the research was to study the clinical and psychopathological characteristics and specificity of the social functioning of patients with hallucinatory-paranoid disorders (НРD) in moderate vascular dementia (MVD). To achieve this goal, a comprehensive methodological approach was used, which was implemented using the clinical and psychopathological method, supplemented by the use of psychometric scales (neuropsychiatric inventory (NPI), global assessment functioning scale (GAF), disability assessment scale (WHO / DAS), Bristol daily activity scale (BADL)) and methods of mathematical data processing. In a study of clinical-psychopathological characteristics and social functioning of patients with HPD in MVD 75 patients took part. 41 patients with HPD (main group) and 34 patients without psychotic disorders (control group) were examined. In the structure of clinical-psychopathological manifestations in patients with HPD in MVD the following symptoms were revealed: the prevalence of frequent delusional ideas of material damage, robbery and jealousy - in a moderate degree; a combination of HPD with frequent vagrancy; periodic moderate verbal aggression; frequent rhythm disturbances day / night, frequent low mood, manifested in the form of dysphoria; fear of being alone; frequent states of irritability. The expressed negative influence of HPD on communication function, quality and level of participation in fulfilling the parental role, the need and effectiveness of social contacts, the effectiveness of behavior in non-standard and difficult conditions was established. The influence of HPD on the formation of limitations of their vital functions in communication, ability to use the phone, make purchases, manage finances and use transport in patients of this group was defined. It was proved that the range of social functioning of patients corresponded to disorders ranging from a serious deterioration in functioning in the social and professional spheres - to the inability of functioning in certain areas of life
Statistical mechanics of spatial evolutionary games
We discuss the long-run behavior of stochastic dynamics of many interacting
players in spatial evolutionary games. In particular, we investigate the effect
of the number of players and the noise level on the stochastic stability of
Nash equilibria. We discuss similarities and differences between systems of
interacting players maximizing their individual payoffs and particles
minimizing their interaction energy. We use concepts and techniques of
statistical mechanics to study game-theoretic models. In order to obtain
results in the case of the so-called potential games, we analyze the
thermodynamic limit of the appropriate models of interacting particles.Comment: 19 pages, to appear in J. Phys.
Endemic pemphigus foliaceus (fogo selvagem) and pemphigus vulgaris: immunoglobulin G heterogeneity detected by indirect immunofluorescence
Pemphigus are autoimmune intraepidermal blistering diseases in which immunoglobulin G (IgG) autoantibodies are directed against desmosomal glycoproteins. The aim of this study was to determine the IgG subclass profile of endemic pemphigus foliaceus (fogo selvagem) and pemphigus vulgaris utilizing indirect immunofluorescence. PATIENTS AND METHODS: Twenty-five patients with pemphigus vulgaris, 25 with endemic pemphigus foliaceus (fogo selvagem), and 25 healthy controls were analyzed by indirect immunofluorescence for circulating autoantibodies (total IgG and its subclasses). RESULTS: Our data revealed a significant correlation (PPênfigos são enfermidades auto-imunes bolhosas intraepidérmicas, onde auto-anticorpos IgG se dirigem contra glicoproteínas desmossomais. O objetivo deste estudo foi determinar o perfil de subclasses de imunoglubulina G no pênfigo foliáceo endêmico (fogo selvagem) e no pênfigo vulgar através da imunofluorescência indireta. MÉTODOS: Vinte e cinco doentes de pênfigo foliáceo endêmico (fogo selvagem), 25 de pênfigo vulgar e 25 controles sadios foram analisados através da imunofluorescência indireta, com respeito aos auto-anticorpos circulantes (imunoglobulina G total e subclasses). RESULTADOS: Nossos dados mostram uma correlação estatisticamente significativa (
Organisational arrangement of human resources management in organisations operating in Slovakia and Czech Republic
Exclusive Measurement of the Nonmesonic Weak Decay of ^{5}_{\Lambda}He Hypernucleus
We performed a coincidence measurement of two nucleons emitted from the
nonmesonic weak decay (NMWD) of ^{5}_{\Lambda}He formed via the
^{6}Li(\pi^+,K^+) reaction. The energies of two nucleons and the pair number
distributions in the opening angle between them were measured. In both np and
nn pairs, we observed a clean back-to-back correlation coming from the two-body
decay of \Lambda p --> n p and \Lambda n --> n n, respectively. The ratio of
the nucleon pair numbers was N_{nn}/N_{np}=0.45 \pm 0.11(stat)\pm 0.03(syst) in
the kinematic region of cos(theta_{NN}) < -0.8. Since each decay mode was
exclusively detected, the measured ratio should be close to the ratio of
\Gamma(\Lambda p --> np)/\Gamma(\Lambda n --> nn).
The ratio is consistent with recent theoretical calculations based on the
heavy meson/direct quark exchange picture.Comment: Submitted to Phys. Rev. lett., 4 pages, 3 figure
Production of H and H with the (K,) reaction
The production of neutron rich -hypernuclei via the
(,) reaction has been studied using data collected with the
FINUDA spectrometer at the DANE -factory (LNF). The analysis of the
inclusive momentum spectra is presented and an upper limit for the
production of H and H from Li and Li, is
assessed for the first time.Comment: 11 pages, 3 figures. Accepted for publication in PL
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