introduction penetration of a bicycle brake handle into the orbit is a rare and serious type of trauma. globe subluxation due to such trauma has not been previously reported. case presentation a 10-year-old girl presented after falling from a bicycle, which resulted in the handbrake penetrating her right upper eyelid. on examination, the globe was subluxated anteriorly, there was no light perce...

suppose $g$ is a split connected‎ ‎reductive orthogonal or symplectic group over an infinite field‎ ‎$f,$ $p=mn$ is a maximal parabolic subgroup of $g,$ $frak{n}$ is‎ ‎the lie algebra of the unipotent radical $n.$ under the adjoint‎ ‎action of its stabilizer in $m,$ every maximal prehomogeneous‎ ‎subspaces of $frak{n}$ is determined‎.

purpose : granular cell tumors (gct) are benign unusual neoplasms which have been proven to have a schwann cell phenotype. they rarely occur in the eye region. case reports : we report three cases of gct in the ocular adnexa including palpebra, subconjuctiva and orbit which rarely occur. patients are, a young girl with the lesion in orbit and presentation of proptosis, a middle aged man with th...

two cases of hydatid cysts of the orbit causing unilateral exophthalmos are reported. diagnosis were suspected by means of computed tomography (ct) and confirmed at operation. ct changes are described and its value in diagnosis of this lesion particularly in the endemic areas is stressed.

Homoclinic bifurcation with one orbit flip, two inclination flips and resonance in the tangent directions of homoclinic orbit is considered. By studying the associated successor functions constructed from a local active coordinate system, we prove the existence of double 1-periodic orbit, 1-homoclinic orbit, and also some coexistence conditions of 1-periodic orbit and 1-homoclinic orbit.

dynamic game theory is applied to analyze the timber market in northern iran as a duopsony. the nash equilibrium and the dynamic properties of the system based on marginal adjustments are determined. when timber is sold, the different mills use mixed strategies to give sealed bids. it is found that the decision probability combination of the different mills follow a special form of attractor an...

in this study, the problem of determining an optimal trajectory of a nonlinear injection into orbit problem with minimum time was investigated. the method was based on orthogonal polynomial approximation. this method consists of reducing the optimal control problem to a system of algebraic equations by expanding the state and control vector as chebyshev or legendre polynomials with undetermined...

purpose: to report the clinical, radiological, pathological and therapeutic features of a case of recurrent cavernous hemangioma. case report: a 32 year old lady with progressive decrease of vision in her right eye associated with blepharoptosis was diagnosed to have orbital cavernous hemangioma which was excised. 10 years later she presented with recurrent proptosis and progressive eye deviati...