Báo cáo khoa học: "The Costs of Inheritance in Semantic Networks" pot

... The Costs of Inheritance in Semantic Networks Rob't F. Simmons The University of Texas, Austin Abstract Questioning texts represented in semantic relations I requires ... needed to obtain transitive closure for inheritance, but in other studies of this text a great deal of power is gained by using general inference rules for paraphrasing the question into t...

Ngày tải lên: 17/03/2014, 19:21

... proteins that evolved independently from hemocyanins [4]. Although hexamerins might be ubiquitous in insects [14,19–21], hemocyanin appears to be missing in eume- tabolous insects [22]. Here we investigate ... coordinated by three histidines in two distinct binding sites. Some hemocyanins assemble into large oligomers of up to 8 · 6 subunits [1]. The occurrence and properties of hem...

Ngày tải lên: 18/02/2014, 08:20

... gradual decrease of the number of nucleosomes per chain in the main peak, with a corresponding increase in the Fig. 5. UV absorbance profiles of sucrose gradients of an oligonu- cleosome sample of six to ... the size of the original samples after digestion of the linkers, was sug- gested by Dorigo et al. [14] to indicate incomplete crosslinking. However, incomplete but random...

Ngày tải lên: 18/02/2014, 18:20

... Topotecan. Treatment with Quercetin did not inhibit ROS generation, and enhanced cytotoxicity of Topotecan in both cells. In contrast, NAC enhanced resistance against doxorubicine and vincristine ... perplexing diversity of lesions is continuously induced in our genes ranging from sin- gle and double strand breaks, to chemical alterations of nucleo- tides including adducts, as wel...

Ngày tải lên: 19/02/2014, 07:20

... doubling rules in the inflection of English verbs C. The determination of word-breaking rules as used in end -of- the-line practices in type composition D. The determination of parts -of- speech ... leads to interest- ing results. In order to obtain a procedure for finding affixes, we will make use of one of the main results of reference 1. There we found that certain...

Ngày tải lên: 19/02/2014, 19:20

... The Role Of Focussing in Interpretation of Pronouns Candace L. Sidner Artificial Intelligence Laboratory Massachusetts Institute of Technology Cambridge, MA 02139 ... authors all point out the need for inferencing as part of anaphora disambiguation, but each of their schemes for inferencing suffer from the need for control which will reduce the combinatorial ... represe...

Ngày tải lên: 21/02/2014, 20:20

... Rules for Assigning Initiative about the effectiveness of Socratic tutoring in the BEE domain or Socratic tutoring in general. 3.2 Initiative Annotation Method The two definitions of initiative we ... an- notated using changes in initiative as a starting point; these changes were taken as marking either a segment endpoint or the beginning of a nested segment. tion following a ques...

Ngày tải lên: 22/02/2014, 02:20

... binding of chromodomains to methylated lysines. Indeed, chromo- domain-containing proteins are involved in a variety of functions, but all seem to deal with chromatin. In some of these proteins, ... acetyl-lysine binding modules present in ATP-dependent chromatin remodelling factors as well as in some HATs and other nuclear protein s of unknown function [89]. B romodomain-cont...

Ngày tải lên: 07/03/2014, 16:20

... finite resolving power; it is not the result of an intrinsically indeterminate use of a discrete set of symbols however compli- cated. This being so, language can certainly be described in ... by the methods of the linguist than by those of the statistician. The indeterminacy which does exist in lan- guage is the indeterminacy which arises from the mapping of a continu...

Ngày tải lên: 07/03/2014, 18:20

... GTT, GGA and GGG, leucine was substituted with tyrosine, phenylala- nine, tryptophan, alanine, glycine, arginine, histidine, aspar- tic acid, asparagine, serine and proline, respectively. The amplified ... equivalent in nin- hydrin colour to 1.0 l mol of leucine in 5 h at pH 7.4 at 37 °C in the presence of CaCl 2 . Data are expressed as the mean ± SD of three independent experiment...

Ngày tải lên: 16/03/2014, 00:20