WHIGHAM, D. F. (Chesapeake Bay Center for Env. Stud., Smithsonian Instn., P.O. Box 28, Edgewater, MD 21037) and R. L. SIMPSON, (Biol. Dept., Rider Coll., Lawrenceville, NJ 08648). Germination and dormancy studies of Pontederia cordata L . Bull. Torrey Bot. Club 109: 524-588. 1982.-Pontederia rootstocks d o not require low temperature treatment to produce shoots and the lack of a required strati...

Recall that algebraic sets are characterized by resolution tower structures [AK1], [AK2]. A topological space with such a structure is called a T R space for short. In low dimensions existence of resolution tower structures can often be detected by combinatorial invariants of the underlying topological spaces. For example, let X be a locally cone-like Euler stratified space (i.e., a locally con...

A nearly complete and undisturbed Miocene carbonate sequence is present in the easternmost part of the UmbriaMarche basin, Italy, which is ideal for detailed and integrated stratigraphic investigations of the Miocene Epoch. In this study, we were trying to obtain evidence for the presence or absence of distal ejecta from the 15 Ma Ries impact structure in southern Germany, located about 600 km ...

In this paper we show that, for each Ekedahl-Oort stratum contained in the supersingular locus, the number of its irreducible components is equal to a class number of a quaternion unitary group. MSC: primary: 14K10; secondary: 11G10; 14L05

This paper presents a novel surface reconstruction algorithm based on 3D point cloud sliced by a series of planes vertical to Z-axis. First, the density and distribution of point cloud is analyzed in vertical direction Z-axis and a stratified point cloud model is put forward to present an object feature, in which point cloud is sliced with irregular intervals. An approach of stratified point cl...

Results Plasma MR-proANP was raised in patients who died (n 101) compared with that seen in survivors (median 310 [range 48 to 1,150] pmol/l vs. 108 [range 4.9 to 1,210] pmol/l, p 0.0001). Using Cox modeling, log10MR-proANP (hazard ratio 3.87) and log10NT-proBNP (hazard ratio 3.25) were significant independent predictors of death. In patients stratified by NT-proBNP in the highest quartile ( 5,...

Most planning problems have strong structures. They can be decomposed into subdomains with causal dependencies. The idea of exploiting the domain decomposition has motivated previous work such as hierarchical planning and factored planing. However, these algorithms require extensive backtracking and lead to few efficient general-purpose planners. On the other hand, heuristic search has been a s...

Any pl-stratified pseudomanifod can be normalized preserving its intersection homology. In this paper we extend this result for any topological stratified pseudomanifold and for a family of perversities which is larger than usual. Our construction is functorial. We also give a detailed description of the normalizer’s stratification in terms of the initial stratified pseudomanifold.