Let T be a triangulated surface given by the list of vertex-triples of its triangles, called rooms. A room-partitioning of T is a subset R of the rooms such that each vertex of T is in exactly one room in R. We prove that if T has a room-partitioning R, then there is another roompartitioning of T which is different from R. The proof is a simple algorithm which walks from room to room, which how...

A catalyst-free one-pot three component methodology for the synthesis of α-aminonitriles under ultrasonic irradiation at room temperature using [Bmim]Br as a neutral reaction medium is described. A broad range of substrates including the aromatic, heteroaromatic and aliphatic aldehydes were condensed with amines (aliphatic and aromatic) and trimethylsilyl cyanide (TMSCN). Using this method, all...

An efficient and eco-friendly method has been developed for the synthesis of 1,4 disubstituted 1,2,3-triazoles using the eggshell-supported-Cu(I) metformin complex as a natural and heterogeneous catalyst. The catalyst prepared is characterized by FT-IR spectroscopy, SEM, and ICP techniques. Terminal alkynes were successfully reacted with alkyl chloride and sodium azide in the presence of CuI im...

Bed bugs, Cimex lectularius L., hide in cracks and crevices in furniture and are difÞcult to control. The bed bug thermal death kinetics were examined to develop a heat treatment method to eliminate bed bug infestations in room contents. High temperatures caused temporary immobilization (knockdown) of bed bugs evenwith exposures that did not have lethal effects. Exposure of bed bug adults to 39...

this study was conducted on two canola (brassica napus) cultivars, okapi a winter type and cold tolerant and rgs003 a spring type and cold sensitive. seedlings were grown in an environmentally controlled growth room with 16 h d-1 photoperiod at 22/16 °c (day/night, control). at the 4-leaf stage, half of pots were transferred to a cold growth room for 7 d at 10/3°c (day/night, cold treatment) an...

Enveloped viruses attach to host cells by binding to receptors on the cell surface. For many viruses, entry occurs via membrane fusion after a sufficient number of receptors have engaged ligand proteins on the virion. Under conditions where the cell surface receptor densities are low, recruitment of receptors may be limited by diffusion rather than by receptor-ligand interactions. We present a ...

C = network connectivity C = total journey cost D = matrix of maximum communication range between nodes (Rn×n) E = set of edges in G EG = subset of edges in G G = graph containing all nodes and edges G = evolving graph H = number of hops in a journey J = set of feasible journeys J = journey between nodes J = highest-value journey M = total number of edges in G m = number of edges in G N = total...

This paper proposes an approach on UNL document summarization. Our approach employs both the surface and semantic information of UNL annotation to summarize documents. With the merit of semantic annotation of the UNL, the essence of the document is efficiently collected which facilitates the abstraction function for language generation. The multilinguality can also be realized through the langu...

2.7 times increase in room temperature photoluminescence (PL) intensity and 3.2 times increase in electroluminescence (EL) intensity were observed in blue multi-quantum-well (MQW) GaN/InGaN light emitting diodes (LEDs) as a result of introduction of nano-needle structure embedded with Ag nanoparticles (NPs) into n-GaN film underlying the active MQW region and thick p-GaN contact layer of LEDs. ...

PURPOSE To compare operating room times between retroperitoneal robot-assisted laparoscopic radical prostatectomy (RALRP) and pure retroperitoneal laparoscopic radical prostatectomy (LRP). PATIENTS AND METHODS From March 2007 to April 2008, 288 patients underwent an extraperitoneal LRP in our institution. Eighty-three LRPs were performed with robot assistance using the da Vinci Surgical Syste...