We address the problem of designing optimal bu er management policies in shared memory switches when packets already accepted in the switch can be dropped pushed out Our goal is to maximize the overall throughput or equivalently to minimize the overall loss probability in the system For a system with two output ports we prove that the optimal policy is of push out with threshold type POT The sa...

Natural Family Planning ............................. 1 The Menstrual Cycle .................................. 4 Male Fertility ................................................ 6 Contraceptives ........................................... 9 Under the Microscope Staging the Menopausal Transition: TREMIN and STRAW.................................. 13 Of Interest ......................................

The butter boletes (Boletus s.l. sect. Appendiculati) are an economically important group of ectomycorrhizal fungi whose basidiocarps have a yellow tube layer that often bruises blue, yellow reticulate stipe, mild flavor and firm yellow-tinged flesh that may or may not turn blue when exposed. Morphological characters and molecular data (ITS and LSU) place this group in a separate phylogenetic c...

The 1, 3-bis(trimethyl silyl)ether of p-tert-butyl calix[4]arene, Rt-Bu)Ca1ixTMS21112, has beensynthesized and used as a dianionic ligand for "Sn". The complex of [(t-Bu)Ca1ixTMS2]Snexhibits exo and endo isomerism. The structural properties of [(Rp)Ca1ixTMS2]Sn, (Rpara= H,CH3, t-Bu) and the inter conversion of exoendo isomers were investigated by using of SCF-MOPM3 method.

Acute graft-versus-host disease (aGVHD) is a major complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT) and a major cause of nonrelapse mortality after allo-HSCT. A conditioning regimen plays a pivotal role in the development of aGVHD. To provide a platform for studying aGVHD and evaluating the impact of different conditioning regimens, we established a murine aGVHD mo...

BACKGROUND Busulfan (Bu) and cyclophosphamide (Cy) are frequently included in conditioning regimens before hematopoietic stem cell transplantation (HSCT). Both drugs are detoxified by glutathione transferases (GST), and GST gene variants may explain some of the interindividual variability in pharmacokinetics and drug toxicity. METHODS The study investigated adult patients (n = 114) receiving ...

Processor performance can be sensitive to load-store ordering, memory bandwidth, and memory access latency. A store bu er is a mechanism that exists in many current processors to accomplish one or more of the following: store access ordering, latency hiding, and data forwarding. Di erent policies that govern store bu er behavior can a ect overall processor performance. However, the performance ...

The alkane elimination reaction between Salen((t)Bu)H(2) ligands and diethylaluminum bromide was used to prepare three Salen aluminum bromide compounds salen((t)Bu)AlBr (1) (salen = N,N'-ethylenebis(3,5-di-tert-butylsalicylideneimine)), salpen((t)Bu)AlBr (2) (salpen = N,N'-propylenebis(3,5-di-tert-butylsalicylideneimine)), and salophen((t)Bu)AlBr (3) (salophen = N,N'-o-phenylenenebis(3,5-di-ter...

This study was carried out to determine the metabolic pathways of buspirone and cytochrome P450 (P450) isoform(s) responsible for buspirone metabolism in human liver microsomes (HLMs). Buspirone mainly underwent N-dealkylation to 1-pyrimidinylpiperazine (1-PP), N-oxidation on the piperazine ring to buspirone N-oxide (Bu N-oxide), and hydroxylation to 3'-hydroxybuspirone (3'-OH-Bu), 5-hydroxybus...

With a small modi cation the z bu er can be made exi ble enough to be used in global illumination algorithms tra ditionally handled only by ray casting but still enjoy the bene ts of z bu er algorithms including predictable perfor mance memory coherence and acceleration using special ized z bu er hardware The fundamental di erence between the path bu er and a standard z bu er is that the global...