A particular kind of quintessence is considered, with equation of motion pQ/ρQ = −1, corresponding to a cosmological term with time-dependence Λ(t) = Λ(t0)(R(t0)/R(t)) P which we examine initially for 0 ≤ P < 3. Energy conservation is imposed, as is consistency with big-bang nucleosynthesis, and the range of allowed P is thereby much restricted to 0 ≤ P < 0.2. The position of the first Doppler ...

We present a brief description of the design of a diagrambased system that supports the development of thinking about mathematical generalisation. Within the software, the user constructs a dependency graph that explicitly shows the relationships between components of a task. Using this dependency graph, the user manipulates graphical visualisations of component attributes which helps them move...

This document describes a mechanism for a restarting router to signal to its neighbors that it is restarting, allowing them to reestablish their adjacencies without cycling through the down state, while still correctly initiating database synchronization. This document additionally describes a mechanism for a restarting router to determine when it has achieved LSP database synchronization with ...

We have expressed in Escherichia coli cDNA corresponding to human lamins A and C, together with a number of fragments produced using site-specific mutagenesis. The proteins produced in this way were characterised both biochemically and ultrastructurally, and appeared to retain their native conformation. Crosslinking showed that all fragments formed 4-chain molecular dimers ('tetramers') analogo...

Many cellular functions involve the complex network of actin filaments, microtubules, and intermediate filaments collectively known as the cytoskeleton. Stereo transmission electron microscopic observations of whole cynomolgus monkey trabecular cells, which were extracted, S-1 labeled, and critical-point dried, were employed to simultaneously identify these three major cytoskeletal systems and ...

Background: Hydroxyurea (HU) is a well known chemotherapeutic agent that has been used largely for various myeloproliferative diseases over the past 20 years. In β-thalassemia, the effect of HU is much less clear and remains controversial. This study was undertaken to describe the hematologic and clinical responses of thalassemia major and intermediate patients to HU treatment during 2 years. M...

results of the bromination and dehydrobromination of several angular methylated decalindiones are described. the key reaction, base-induced cyclization of the monobromo keto ester (3), and the dibromo ketone (4), leads to the formation of tricyclic systems (6) and (9) respectively.

this study was an attempt to investigate whether teaching critical reading strategies had any significant effect on intermediate efl learners’ vocabulary retention. to fulfill the purpose of this study, 72 male and female students within the age range of 17 to 32 years studying at farzan and farzanegan language schools in tehran at intermediate level were selected from a total number of 114 par...