We consider Kirchhoff equations with strong damping, namely with a friction term which depends on a power of the “elastic” operator. We address local and global existence of solutions in two different regimes depending on the exponent in the friction term. When the exponent is greater than 1/2, the dissipation prevails, and we obtain global existence in the energy space assuming only degenerate...

The coalescent revolutionised theoretical population genetics, simplifying, or making possible for the first time, many analyses, proofs, and derivations, and offering crucial insights about the way in which the structure of data in samples from populations depends on the demographic history of the population. However statistical inference under the coalescent model is extremely challenging, ef...

We consider the roots of uniformly chosen complex and real reciprocal polynomials of degree N whose Mahler measure is bounded by a constant. After a change of variables this reduces to a generalization of Ginibre’s complex and real ensembles of random matrices where the weight functions (on the eigenvalues of the matrices) is replaced by the exponentiated equilibrium potential of the interval [...

extramedullary plasmacytoma (emp) is a rare neoplasm of soft tissue which usually arises in the respiratory tract, nasal cavity, sinuses and nasopharynx. multiple extramedullary plasmacytomas are extremely rare, especially those that are not associated with multiple myeloma.we describe multiple primary emp in a 37 year old man, without involvement of bone or bone marrow. emp usually has a good ...

epidemiological studies have shown wide geographical and racial variation in the prevalence and patterns of immunodeficiency disorders. to determine the frequency of primary immunodeficiencies (pid) in iran, the iranian primary immunodeficiencies registry (ipidr) was organized in 1999. the diagnosis of immunodeficiency in our patients was based on standard criteria. the patient’s data were extr...

a survey was carried out in 1998-99 among 20 selected primary schools in the north, south, east and west regions of tehran to determine the level of teachers’ knowledge of asthma. 387 (96.7%) of 400 questionnaires were completed and evaluated. five items were investigated: “general knowledge”, “symptoms and triggers”, exercise”, treatment” and “individual experience”. statistical analysis was p...

objective(s):glaucoma is the second leading cause of blindness and it is related to oxidative stress based on numerous studies. glutathione s-transferases (gsts) are members of multigenic family, which have important role in cells as an antioxidant. in the present study, we examined the polymorphism of gstt1 and gstm1 deletion genotypes (t0m1, t1m0, and t0m0) in 100 glaucoma patients (41with pr...

hyperparathyroidism is an endocrine abnormality that frequently causes diffuse osteopenia in the bones. osteosclerosis is a rare phenomenon in adults with primary hyperparathyroidism since the usual skeletal manifestation is generalized osteopenia. we describe a patient with generalized osteosclerosis in the jaws and skull in association with primary hyperparathyroidism, while the other skeleta...

introduction: lymphoma may involve the gastrointestinal tract either primarily or as a manifestation of extensively disseminated systemic disease. stomach being the most frequent site of primary gastroin-testinal lyphoma, followed by the small bowel and colon respectively (1&2&3). for diagnosis of pi-mary small intestinal lymphoma (psil), one most satisfies the criteria specified by dawson and ...