Tài liệu Báo cáo khoa học: "PARAHETRIZED FOR LINGUISTIC ABSTRACT FORMATION OBJECTS PROCESSING" doc

... parametrized abstract objects as tools for linguistic information processing and exemplifies the use of such objects for temporal information. INTRODUCTION In computational linguistics, ... primitives for linguistic information processin~ and a clear semantics at the formal computational level are now slowly emergin~ as a convergent effort from computer science, linguistics, ... linguistic information, namely temporal information ,has led us to advocate the use of a language with the following characteristic features: - high level of abstraction; - capacity for...

Tài liệu Báo cáo khoa học: "Resolution for Machine Translation of Telegraphic Messages" docx

... most likely tag for each word is assigned, contextual transformations are used to improve the accuracy. We have evaluated the tagger performance on the TEST Data both before and after training ... originates from verbs, which provide information on subcategorization, and prepositions, which are critical for PP-attachment ambiguity res- olution. For the given domain, lexicalizing domain-specific ... ~ammar while retaining lexical/semantic information to minim'ize the ambiguity of the input text. The question is: how much semantic and syntactic information is necessary? We propose a solution,...

Tài liệu Báo cáo khoa học: "The Lexical Component of Natural Language Processing" docx

... Princeton University Language Abstract Computational linguistics is generally considered to be the branch of engineering that uses computers to do useful things with linguistic signals, but it ... Language provides a critical test for the hypothesis that physical symbol systems are adequate to perform all human cognitive functions. As yet, no adequate system for natural language processing ... computers must work hard to do far less well. A linguistic approach generally involves a parser, a lexicon, and some ad hoc rules for using linguistic context to identify the context-appropriate...

Tài liệu Báo cáo khoa học: "INFORMATION RETRIEVAL USING ROBUST NATURAL LANGUAGE PROCESSING" docx

... information theory, which formalizes the dependencies between the information and the probability distribution of the given code (alphabet or language). As stated by Shannon (1948), information ... its particular signs, to transmit information. It should be emphasized that, according to the information theory, there is no direct relation between information and meaning, entropy giving ... Recall/precision statistics for CACM-3204 information about the database except for the text of the documents (i.e., not even the hand generated key- word fields enclosed with most documents were used)....

Tài liệu Báo cáo khoa học: Looking for the ancestry of the heavy-chain subunits of heteromeric amino acid transporters rBAT and 4F2hc within the GH13 a-amylase family ppt

... Mayrose I, BacharachE & Pupko T (2005) Selecton: a server for detectingevolutionary forces at a single amino-acid site. Bioin-formatics 21, 2101–2103.39 Da Lage JL, Danchin EG & Casane ... ﬁfthCSR (QPDLN for both human rBAT and Bacil-lus cereus oligo-1,6-glucosidase) [20] (Fig. 2), may indi-cate a shorter evolutionary distance for rBATs fromthe GH13 ancestor common for both rBAT ... iden-tiﬁable, even for the enzymatically active GH13 mem-bers [13]. Therefore, one of the goals was to aligncorrectly the b5-strands of the hcHAT sequences,which was especially problematic for the 4F2hc...

Tài liệu Báo cáo khoa học: Role for nectin-1 in herpes simplex virus 1 entry and spread in human retinal pigment epithelial cells docx

... RT-PCRanalysis was performed as described previously. Theexpected sizes of the PCR products were 1270 bp for HVEM, 738 bp for nectin-1, 616 bp for nectin-2, and736 bp for 3-OST-3, respectively. ... phalloidin (Invitrogen) was added for F-actin staining at room temperature for 45 min. Finally, thecells were washed three times with 1· NaCl ⁄ Pibefore micros-copy was performed using the 20· objective ... of nec-tins induce formation of ﬁlopodia and lamellipodiathrough the respective activation of Cdc42 and Racsmall G proteins. J Biol Chem 277, 50749–50755.Supporting informationThe following...

Tài liệu Báo cáo khoa học: Evidence for noncooperative metal binding to the a domain of human metallothionein ppt

... thesepapers clearly show domain-speciﬁc binding for M2+(M ¼ Zn, Cd) initially to the a domain, thereby lead-ing to formation of the M4a cluster prior to formation of the M3b cluster, demonstrating ... under limiting Cd2+con-ditions. Titration with four molar equivalents of Cd2+was required for the formation of the Cd4a species in 100% abundance. The implications of anoncooperative metal-binding ... results in the formation of discrete metal–thiolate clusters within each of the a and b domainswith stoichiometries of [M4(Scys)11] and [M3(Scys)9],respectively, for divalent metal...

Tài liệu Báo cáo khoa học: Progress for dengue virus diseases Towards the NS2B–NS3pro inhibition for a therapeutic-based approach ppt

... viral life cycle is essential in order tohighlight potential targets for antiviral therapy and toobtain key information for the rational design of anti-viral drugs.Virus structure and replicative ... vitrosystems as supportive medical care and for sympto-matic treatment; they represent an important aid for patients and for improving survival in severe forms ofdisease. Antiviral therapeutic ... proteaseresponsible for site-speciﬁc cleavages in the viral poly-protein. Proc Natl Acad Sci USA 87, 8898–8902.99 Bartenschlager R, Lohmann V, Wilkinson T & KochJO (1995) Complex formation between...

Tài liệu Báo cáo khoa học: Enzymes for the NADPH-dependent reduction of dihydroxyacetone and D-glyceraldehyde and L-glyceraldehyde in the mould Hypocrea jecorina doc

... converting glycerol to glyceraldehyde. The formation of glyceraldehyde is energetically less favourable thanthe formation of DHA, and is not observed for thisreason. Another possible explanation ... frames using PCR. For the ﬁrst potential glycerol dehydrogenase gene, wepredicted introns in the genomic DNA. For that rea-son, we ampliﬁed the open reading frame from cDNA. For the second of ... Thetagged protein was puriﬁed and then used for furtheranalysis.In the reductive reaction, the Michaelis–Menten con-stant Km for DHA was 1 mm, and the Km for NADPH was 50 lm. The Vmaxwas estimated...

Tài liệu Báo cáo khoa học: Evidence for interactions between domains of TatA and TatB from mutagenesis of the TatABC subunits of the twin-arginine translocase docx

... indicatedabove the lanes) were assessed using export assays for TorA(upper panel) or TorA-GFP (lower panel) as described earlier for other mutants (Fig. 2).Mutagenesis of TatABC C. M. L. Barrett ... essential for Tat function. Taking these previ-ous reports into consideration, the logical conclusion isthat several residues (F20, G21 in TatA, G21, P22,P26 in TatB) are probably important for ... completelyblocks translocation activity and this reinforce s theimportance of this region. Truncation analysis hassimilarly pointed to essential roles for this region inboth TatA and TatB [29]. While...

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