República velha, tese nova

Quark - Nova

We explore the scenario where the core of a neutron star (having experienced a transition to an up and down quark phase) shrinks into the equilibrated quark object after reaching strange quark matter saturation density (where a composition of up, down and strange quarks is the favored state of matter). The overlaying (envelope) material free-falls following the core contraction releasing upto 1...

Tahanidae (Dipt.) d'Iran, Tabanus mofidii nova species

Tese Submetida Ao Corpo Docente Da Coordenaç~o Dos

of Thesis presented to COPPE/UFRT as partia1 fulfillment ef the requirements for the degree of Master of Science (M. Sc. ) . A SET OF TOOLS FOR THE I W W N T A T I O N OF COOPERATIVE P R O C E S S

Sperm retrieval techniques in azoospermic patients: PESA, MESA, TESA, TESE and MICROTESE Técnicas de recuperação de espermatozoides em pacientes azoospérmicos: PESA, MESA, TESA, TESE e MICROTESE

Received on: April 28, 2009 – Accepted on: Oct 15, 2009 aBstRact Azoospermia is defined as the absence of mature spermatozoa in semen analysis after centrifugation. The causes of azoospermia may be related to spermatogenesis defects and classified as nonobstructive azoospermia, or to the obstruction of the efferent ducts of the genital tract and classified as obstructive azoospermia. Before the...

Recurrent Nova IM Normae

We detected the second historical outburst of the 1920 nova IM Nor. Accurate astrometry of the outbursting object revealed the true quiescent counterpart having a magnitude of R=17.0 mag and B=18.0 mag. We show that the quiescent counterpart shows a noticeable variation. From the comparison of light curves and spectroscopic signatures, we propose that IM Nor and CI Aql comprise a new class of r...