Recently we described a new method for in situ localization of specific DNA sequences, based on lac operator/repressor recognition (Robinett, C.C., A. Straight, G. Li, C. Willhelm, G. Sudlow, A. Murray, and A.S. Belmont. 1996. J. Cell Biol. 135:1685-1700). We have applied this methodology to visualize the cell cycle dynamics of an approximately 90 Mbp, late-replicating, heterochromatic homogene...

Computational complexity and approximability are studied for a problem of intersecting a set of straight line segments with the smallest cardinality set of disks of fixed radii r > 0 where the set of segments forms a straight line drawing G = (V,E) of a planar graph without edge crossings. Similar problems arise e.g. in network security applications (Agarwal et al., 2013). We claim strong NP-ha...

created from file: ieeetcomm94coverpage.tex cover page automatically created with CoverPage.sty A 6 s i ~ a c tIn this contribution, we describe a method for displacement estimation in stereoscopic images, which is closely coupled with a segmentation of the pictures into homogeneously displaced regions. The technique is driven by a statistical optimization criterion which assesses the quality o...

We report the MR features in a previously healthy patient with mucosa-associated lymphoid tissue lymphoma of the pituitary gland. The MR images showed a homogeneously enhancing solid mass in the sellar region and both parasellar regions; this mass extended through the bilateral foramina ovale along the third branches of the trigeminal nerves. The mass completely encircled the cavernous segments...

We study the effects of atomic detuning in a composite system consisting of a degenerate optical parametric oscillator and a set of N homogeneously broadened two-level atoms. The stability regions and the optical spectra of this composite system are investigated as a function of atomic detuning and other parameters. Near the lower turning point of the bistable curve, the unsqueezed field quadra...

Two patients with Tolosa-Hunt syndrome (THS) who had atypical lesions in the intrasellar and juxtasellar regions are reported. They manifested with painful ophthalmoplegia. Magnetic resonance imaging (MRI) commonly showed an increase in the volume of the cavernous sinus occupied by homogeneously well-enhanced lesions in both cases. These lesions extended to the intrasellar and juxtasellar regio...

background and aims. several diagnostic methods are being employed to detect benign and malignant lesions, one of which is silver nitrate staining for organizer regions. the number of nucleolar organizing regions (nors) can be used to show the degree of cell activity or metabolism in pathologic lesions. this study was designed to evaluate nors as determinants of precancerous and squamous cell c...