Báo cáo khoa học: "The Acquisition and Application of Context Sensitive Grammar for English" docx

... The Acquisition and Application of Context Sensitive Grammar for English Robert F. Simmons and Yeong-Ho Yu @cs.texas.edu Abstract Department of Computer Sciences, AI Lab University of Texas, ... parsing and rapid acquisition of CSG from example parsings of newspaper stories. Chomsky[1957] defined a hierarchy of grammars in- cluding context- free and context- sensitive ones. For nat- ... 1984]. In context- sensitive grammars, the productions are restricted to rewrite rules of the form, uXv * uYv where u and v are context strings of terminals or nonter- minals, and X is a...

Tài liệu Báo cáo khoa học: The isolation and characterization of cytochrome c nitrite reductase subunits (NrfA and NrfH) from Desulfovibrio desulfuricans ATCC 27774 Re-evaluation of the spectroscopic data and redox properties ppt

... cryostat.Results and discussionElectrophoretic profileFigure 1A shows the SDS/PAGE of purified ccNiR upondifferent treatments. The complex dissociates into an intenseband of 61 kDa (NrfA) and a band of weak ... well as a faint band at37 kDa, suggesting the presence of dimers. All of the bandsstained positively for heme c (Fig. 1B) but only the highmolecularmassbands(‡ 55 kDa) stained for nitrite redu-cing ... intensity of 19 kDa (NrfH), confirming its hetero-oligomeric nature(Fig. 1, lane 1).However, in the absence of boiling (Fig. 1A, lanes 2 and 4) high molecular mass bands of approximately 110 kDaand...

Tài liệu Báo cáo khoa học: "The Structure and Process of Talking About Doing" pdf

... Structure and Process of Talking About Doing James A. Levln and Edwin L. Hutchins Center for Human Information Processing University of Callfornia, San Diego People talk •bout what they do, often ... study of problem solving action and report: I) the collected of data on problem solving and talk about problem solving, 2) development of a process model of these behaviors, and 3) use of coding ... problem solving from a record of the problem solving report and a record of moves made. Then, we use this extracted trace to evaluate our model of the role of point of view in problem solving....

Báo cáo khoa học: "THE SYNTAX AND SEMANTICS OF USER-DEFINED MODIFIERS IN A TRANSPORTABLE NATURAL LANGUAGE PROCESSOR" pot

... variants of words not known to it, e.g. plurals for nouns, comparative and superlative forms for adjectives, and past tense and participle forms for verbs. For example, PAST-TENSE VERB ACQUISITION ... shall discuss (a) the types of modifiers LDC provides for; (b) how information about the syntax and semantics of modifmrs is obtained from users; and (c) how this information is used to process ... course grades for students in an academic department, and a bu~di~tg ~rgsvtizatiovt domain, containing information on the floors, wings, corridors, occupants, and so forth for one or more...

Báo cáo khoa học:The isolation and characterization of temperature-dependent ricin A chain molecules in Saccharomyces cerevisiae docx

... tem-peratures for 20 min before the addition of excess unla-belled methionine and cysteine (met ⁄ cys) to start the chase.Chase samples were taken at time zero and various timepoints thereafter, and ... addi-tion of 1 · Kirby Buffer [38]. The rRNA was thenextracted using phenol ⁄ chloroform (1 : 1, v ⁄ v) and precipi-tated with ethanol. Four micrograms of this isolated RNAwas treated with 20 lL of ... sequence. The probe was madeby random priming and the incorporation of [a-32P]dCTP.Hybridization of the probe to the membrane and subse-quent washes were performed as described [29]. Hybridiza-tion...

Báo cáo khoa học: The Yin and Yang of protein folding doc

... MINIREVIEWThe Yin and Yang of protein foldingThomas R. Jahn and Sheena E. RadfordAstbury Centre for Structural Molecular Biology and Institute of Molecular and Cellular Biology, Gerstang ... folding and amyloid ﬁbril formation, concentrating on the role of partially folded states in these processes, the complexity of the free energylandscape, and the potentials for the development of ... stronglysuggests that the formation of the cross-b fold is aninherent property of the polypeptide chain [24]. There-fore, understanding the mechanism of ﬁbril formation for one protein may also...

Báo cáo khoa học: "The detection and representation of ambiguities of intension and description" pptx

... The detection and representation of ambiguities of intension and description Brenda Fawcett and Graeme Hirst Department of Computer Science University of Toronto Toronto, Ontario ... beliefs of agents, and a time of application. We describe such a representation, built on a standard modal logic, and show how it may be used in conjunction with a knowledge base of back- ... description and the associated possible inference failure and for problems of postmodifier deletion. However, there are many other kinds of context in which other intension-related ambiguities and...

Báo cáo khoa học: "Scalable Inference and Training of Context-Rich Syntactic Translation Models" pptx

... translation of f , and a word alignment a between f and e.Our aim is to gain insight into the process of trans-forming π into f and to discover grammatically-grounded translation rules. For this, ... edges of π and alignments. Each node of the graph is labeled withits span and complement span (the latter in italicin the figure). The span of a node n is defined bythe indices of the first and ... complement span of n isthe union of the spans of all nodes nin G thatare neither descendants nor ancestors of n. Nodes of G whose spans and complement spans are non-overlapping form the frontier...

Báo cáo khoa học: "KNOWLEDGE ORGANIZATION AND APPLICATION: BRIEF COMIIENTS OF PAPERS IN THE SESSION " potx

... Quantification is handled through a set of "structural descriptions." It is not clear how negation is handled. The main application is for the command and control of advanced graphics ... KNOI~LEDGE ORGANIZATION AND APPLICATION: BRIEF COMIIENTS ON PAPERS IN THE SESSION Aravind K. Joshi Department of Computer and Information Science The Moore School University of Pennsylvania, Philadelphia, ... normal uses, and the kinds of actions they are normally involved in is necessary for interjretation of sentences dealing with objects. In sentence (1) John opened the bottle and poured the...

Tài liệu Báo cáo khoa học: Identiﬁcation and characterization of the transcription factors involved in T-cell development, t-bet, stat6 and foxp3, within the zebraﬁsh, Danio rerio docx

... internal control for RT-PCR. PCR condi-tions were as follows: one cycle of 94 °C for 3 min, 32cycles of 94 °C for 30 s, 54 °C for 30 s and 72 °C for 30 s,followed by one cycle of 72 °C for 5 min. ... expression of T-bet has beenseen within a wide variety of tissues and cells in theGinbuna crucian carp [27] and, in mammals, in thelung tissue of mouse and spleen and thymus of human and mouse ... stat6,zftbet-F1 and zftbet-R1 for t-bet, and zffoxp3-F1, zffoxp3-R1, zffoxp3-F2 and zffoxp3-R2 for foxp3. These primers ampliﬁed part of the initial predictedsequence which contained the majority of the...

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