Hierarchical terrain models describe a topographic surface at di erent levels of detail, providing a multiresolution representation as well as a data compression mechanism. In this paper, we consider the problem of computing the visibility map, with respect to a xed viewpoint, on a hierarchical triangle-based terrain model. This problem presents two aspects: the extraction of a visibility map a...

The asymmetric unit of the polymeric title compound, [Mg(3)(C(9)H(3)O(6))(2)(C(3)H(7)NO)(4)](n), contains three Mg(II) ions bridged by carboxyl-ate O atoms from two fully deprotonated benzene-1,3,5-tricarboxyl-ate (BTC) trianions and four metal-coordinated dimethyl-formamide (DMF) mol-ecules. One Mg(II) ion is octa-hedrally coordinated by six carboxyl-ate O atoms. The other two cations are each...

our studi es have shown normal cyclical patterns of ovarian stero ids and pituitary gonadotropines in pa tients with congenital absccncc o f th e uteru s. it appears that the life-long abscence of a fun ctioning uterus has no effect o n the fun ctional life span o f t he co rpus lurer um, but may have some effect in the level o f estrogenes iu th e seco nd half of the cycle.

In this paper, we present the Euler’s partition theorem, which states that for every natural number the number of odd partitions is equal to the number of strict partitions. First, we prove this theorem bijectively and then using generating functions. We present two Sylvester’s bijections which, besides proving Euler’s theorem, also give a few other refinements. Fine’s theorem is illustrated by...

otostegia persica (burm.) boiss. is used for the treatment of various diseases in traditional medicine. the aim of this study was to assess the effects of hydroalcoholic extract of the aerial parts of o. persica in dexamethasone (dex) induced hypertension in male wistar rats. for induction of hypertension, dex at 30 µg/kg/day was administered subcutaneously for 14 days. in a prevention study, a...

one hundr od pa t i e nt s hospitalized at t h medical war d o f 2mam khome nyni . hospi tal were psyc hia t r i cally i nterviewe d and examined regardless of the i r phys i ca l diag nos i s . psychiatric diag nosis were so suggested. it was f ound that only 36 rercent o f the s ample were psychologic a l ly normal t he r emaining 64 per cent were found t o have neurotic pers onality o r su~f...

The title cadmium derivative of benzyl-oxyacetic acid, [Cd(C(9)H(9)O(3))(2)](n), exists as a μ(2)-carboxyl-ate-bridged layer network. Two benzyl-oxyacetate units each chelate the metal through a carboxylate as well as through the ether O atoms; the metal is also coordinated by the double-bond carbonyl O atom of two adjacent benzyl-oxyacetate units in an octa-hedral geometry. The metal atom lies...

The Ni(II) atom in the title complex, aqua-bis(2-formyl-6-meth-oxy-phenolato-κ(2)O,O')nickel(II), [Ni(C(8)H(7)O(3))(2)(H(2)O)], is five-coordinated by four O atoms from two o-vanillinate ligands and one water mol-ecule in a slightly distorted square-pyramidal geometry (τ = 0.06). In the crystal structure, the mol-ecules are linked into dimers by inter-molecular O-H⋯O hydrogen bonds.

In the title compound, [Cd(C4H5NO4)(H2O)2] n , the Cd(II) atom exhibits a distorted octa-hedral coordination geometry, defined by one N atom and three O atoms from two iminodi-acetate (IDA) ligands and two water molecules. The tridentate IDA ligand additionally bridges via one of its carboxylate O atoms to another Cd(II) atom, thus forming a zigzag chain along [001]. A three-dimensional network...