25 research outputs found
Gravitational lensing of charged Ayon-Beato-Garcia black holes and non-linear effects of Maxwell fields
Non-singular Ayon-Beato-Garcia (ABG) spherically symmetric static black hole
(BH) with charge to mass ratio is metric solution of Born-Infeld nonlinear
Maxwell-Einstein theory. Central region of the BH behaves as (anti-) de Sitter
for In case of the BH central region behaves as
Minkowski flat metric. Nonlinear Electromagnetic (NEM) fields counterpart
causes to deviate light geodesics and so light rays will forced to move on
effective metric. In this paper we study weak and strong gravitational lensing
of light rays by seeking affects of NEM fields counterpart on image locations
and corresponding magnification. We set our calculations to experimentally
observed Sgr A BH. In short we obtained: For large distances the NEM
counterpart is negligible reaching to linear Maxwell fields. The NEM makes
enlarge the BH photon sphere radius as linearly by raising but deceases
by raising Sign of deflection angle of bending light rays is
changed in presence of NEM effects with respect to ones obtained in absence of
NEM fields. Absolute value of deflection angle raises by increasing
Weak image locations decreases (increases) by raising in presence
(absence) of NEM fields. By raising the closest distance of the bending light
rays weak image locations changes from left (right) to right (left) in absence
(presence) of NEM fields. Einstein rings radius and corresponding Magnification
centroid become larger (smaller) in presence (absence) of NEM fields in case of
weak lensing. Angular separation between the innermost and outermost
relativistic images increases (decreases) by increasing in absence
(presence) of NEM fields. Corresponding magnification decreases (increases)
by raising in absence (presence) of NEM fields. raises
(decreases) by increasing Comment: 36 Pages, 7 Figures and 2 Tabl
Weak Gravitational lensing from regular Bardeen black holes
In this article we study weak gravitational lensing of regular Bardeen black
hole which has scalar charge and mass We investigate the angular
position and magnification of non-relativistic images in two cases depending on
the presence or absence of photon sphere. Defining dimensionless charge
parameter we seek to disappear photon sphere in the case of
for which the space time metric encounters strongly with
naked singularities. We specify the basic parameters of lensing in terms of
scalar charge by using the perturbative method and found that the parity of
images is different in two cases: (a) The strongly naked singularities is
present in the space time. (b) singularity of space time is weak or is
eliminated (the black hole lens).Comment: 20 pages, 7 figures with some revision
Molecular Insights into the Fungus-Specific Serine/Threonine Protein Phosphatase Z1 in Candida albicans
The isotherm, kinetic and thermodynamic studies of the cadmium uptake by colpomenia sinuosa
Smoking, alcohol consumption and the use of drugs by pupils of schools for special education, vocational education and truants' projects 1990
In addition to an earlier survey "Smoking, alcohol consumption and the use of drugs by schoolchildren from the age of ten" (Steinmetz Archive Nr. P1057) among pupils of regular schools, pupils of schools for special education have been interviewed about this subject. Smoking behaviour / number of cigarettes per day / attitude of parents towards smoking / use of alcohol, kind of drinks / r. drunk at last occasion / how and did r. get the drinks / opinions of parents about drinking alcohol by r. / knowledge and use of soft drugs, use of it by friends and opinion of parents / use of sleeping pills, tranquillizers, cocaine, heroine, xtc, amphetamine / absenteeism Background variables: basic characteristics/ place of birth/ residence/ household characteristics/ occupation/employment/ education/ religio
Roken, drinken en druggebruik onder scholieren van het Speciaal Onderwijs, het KMBO en door deelnemers aan spijbelprojecten 1990
In addition to an earlier survey "Smoking, alcohol consumption and the use of drugs by schoolchildren from the age of ten" (Steinmetz Archive Nr. P1057) among pupils of regular schools, pupils of schools for special education have been interviewed about this subject. Smoking behaviour / number of cigarettes per day / attitude of parents towards smoking / use of alcohol, kind of drinks / r. drunk at last occasion / how and did r. get the drinks / opinions of parents about drinking alcohol by r. / knowledge and use of soft drugs, use of it by friends and opinion of parents / use of sleeping pills, tranquillizers, cocaine, heroine, xtc, amphetamine / absenteeism Background variables: basic characteristics/ place of birth/ residence/ household characteristics/ occupation/employment/ education/ religio
Smoking, alcohol consumption and the use of drugs by schoolchildren from the age of 10, 1988-1989
Smoking habits, alcohol consumption and the use of drugs by schoolchildren from the age of ten / frequency of absence, truancy / having a payed job, earnings allowance / knowledge of hashish and marihuana / use of alcohol, tobacco, amphetamines, sedatives, marihuana, hashish, cocaine, heroine, glue etc. / frequency and quantity of use, now and in past / reaction of parents / use of alcohol, tobacco and drugs by friends / obtainability of alcohol and drugs. Background variables: basic characteristics/ place of birth/ residence/ occupation/employment/ education/ religio
Repeated Repeat Problems: Combinatorial Effect of C9orf72-derived Dipeptide Repeat Proteins
A microsatellite expansion mutation in C9orf72 is the most common genetic cause of Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal Dementia (FTD). The expansion mutation leads to C9orf72 loss of function, RNA foci formation, and generation of five species of non-AUG RAN translated dipeptide repeat proteins (DPRs), such as poly(GA), poly(GP), poly(GR), poly(PA), and poly(PR). Although one cell can contain more than type of DPRs, information about interplay between different DPR species is limited. Here we show that the combined expression of distinct C9orf72-derived dipeptide repeat species produces cellular outcomes and structural differences that are unique compared to the expression of a single DPR species, suggesting the complex biological interactions that occur when multiple DPR variants are simultaneously expressed. Our data highlights the need for further analysis of how combined expression of different DPRs affects the disease state