2,418 research outputs found
Bronchoscopy of Lung Cancer
Lung cancer is a leading cancer site in men and women with a high incidence and mortality rate. Most
patients are diagnosed when the disease has already spread. An early, detection and immediate and
accurate histological or cytological diagnosis are essential for a hopeful outcome. In most patients,
bronchoscopy is the method of choice in establishing a suspected lung neoplasm. With the rigid and
flexible method, two complementary techniques are available. The methods bear a very low mortality
rate if sufficient monitoring and resuscitative instrumentation is available. Rigid bronchoscopy
offers the possibility of obtaining large biopsy specimens from the tumorous tissue and provides an
effective tool in the control of major haemorrhage. However, it cannot be used for the inspection of
further peripherally located parts of the bronchial system and needs general anaesthesia. In contrast,
the flexible method can be quickly and readily performed at practically any location using portable
equipment. Bronchi can be inspected up to the 8th order and with bronchial washing, forceps biopsy,
brush biopsy and fluorescence bronchoscopy techniques with a high diagnostic yield are available.
This holds true, especially if these sampling techniques are used as complementary methods
2-Engel relations between subgroups
In this paper we study groups G generated by two subgroups A and B such that is nilpotent of class at most 2 for all aÂż. A and bÂż. B. A detailed description of the structure of such groups is obtained, generalizing the classical result of Hopkins and Levi on 2-Engel groups
Ring-Pattern Dynamics in Smectic-C* and Smectic-C_A* Freely Suspended Liquid Crystal Films
Ring patterns of concentric 2pi-solitons in molecular orientation, form in
freely suspended chiral smectic-C films in response to an in-plane rotating
electric field. We present measurements of the zero-field relaxation of ring
patterns and of the driven dynamics of ring formation under conditions of
synchronous winding, and a simple model which enables their quantitative
description in low polarization DOBAMBC. In smectic C_A* TFMHPOBC we observe an
odd-even layer number effect, with odd number layer films exhibiting order of
magnitude slower relaxation rates than even layer films. We show that this rate
difference is due to much larger spontaneous polarization in odd number layer
films.Comment: 4 RevTeX pgs, 4 eps figures, submitted to Phys. Rev. Let
Binaries with total eclipses in the LMC: potential targets for spectroscopy
35 Eclipsing binaries presenting unambiguous total eclipses were selected
from a subsample of the list of Wyrzykowski et al. (2003). The photometric
elements are given for the I curve in DiA photometry, as well as approximate
Teff and masses of the components. The interest of these systems is stressed in
view of future spectroscopic observations.Comment: 4 pages, 1 figure; poster presented at the conference "Close binaries
in the 21st Century: new opportunities and challenges", Syros, 27-30 June
200
Products of pairwise totally permutable groups
[EN] In this paper finite groups factorized as products of pairwise totally permutable subgroups are studied in the framework of Fitting classesA.M.-P. and M.D.P.-R. were both supported by Proyecto BMF20001-1667-C03-03, Ministerio de Ciencia y Tecnolog´ıa and FEDER, Spain.Hauck, P.; MartĂnez Pastor, A.; PĂ©rez-Ramos, M. (2003). Products of pairwise totally permutable groups. Proceedings of the Edinburgh Mathematical Society. 46(1):147-157. https://doi.org/10.1017/S0013091502000299S14715746
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