Báo cáo khoa học: "Topical Keyphrase Extraction from Twitter" potx

... organize keyphrases by top- ics learnt from Twitter. In our work, we follow the standard three steps of keyphrase extraction, namely, keyword ranking, candidate keyphrase generation 379 and keyphrase ... C, topical keyphrase extraction is to discover a list of keyphrases for each topic t ∈ T . Here each keyphrase is a sequence of words. To extract keyphrases, we first identify t...

Ngày tải lên: 17/03/2014, 00:20

... reactions to major events. Bursty top- ics from microblogs reveal what events have attracted the most online attention. Although bursty event detection from text streams has been studied before, ... bursty topics from mi- croblogs therefore can help us identify the most pop- ular events that have drawn the public’s attention. In this paper, we study the problem of finding bursty topics...

Ngày tải lên: 07/03/2014, 18:20

... total # words in utterance distance (sec.) from start to wj distance (sec.) from wj to end distance (words) from start to wj distance (words) from wj to end is wi accented or not/ or, cliticized, ... hypotheses derived from our own observa- tions and from previous theoretical and practi- cal studies of boundary location. Our corpus for this investigation is 298 sentences...

Ngày tải lên: 08/03/2014, 07:20

... the binding pocket and 7.75 A ˚ from the T1 copper atom (Fig. 5D). Fig. 1. Sequence alignment of McoP with CotA laccase from Bacillus subtilis (1GSK) and CueO from Escherichia coli (1KV7). The ... metallo-oxidase from Aquifex aeolicus. Biochim Biophys Acta 1794, 75–83. 5 Fernandes AT, Soares CM, Pereira MM, Huber R, Grass G & Martins LO (2007) A robust metallo-oxidase from the h...

Ngày tải lên: 18/02/2014, 04:20

... manage- ment from the user and present an intuitive, user-friendly interface from which this necessary metadata can be obtained. The kineticswizard can be launched auto- matically from the instrument ... web services. Kinetic data can be exported from SABIO-RK in SBML format and experimen- tal data exported from MeMo-RK in SBRML format. N. Swainston et al. Enzyme kinetics: from in...

Ngày tải lên: 18/02/2014, 04:20

... enzymes operate near saturation and the kinase readily dissociates from the phosphorylated target (and, likewise, the phosphatase from the unphosphory- lated target), a steep threshold response, ... machinery involving multiply phosphorylated proteins allows DNA replication to start simultaneously from multiple origins of replication [20,107–110]. We have shown recently in a model of re...

Ngày tải lên: 18/02/2014, 08:20

... analyzed by immuno- blotting. RNA extraction, reverse transcription, PCR and real-time PCR mRNA was extracted from cells and tissue (obtained with local ethical permission from the Masaryk Institute ... DNase set was also included. After the extraction, RT-PCR was performed using the Omniscript RT kit from Qiagen (Valencia, CA, USA) and pfu polymerase from Stratagene, following the...

Ngày tải lên: 18/02/2014, 17:20

... Sephadex G-25 and G-50 from Amersham Biosciences (GE Healthcare, Piscataway, NJ), Cleland’s reagent (dithio- threitol) from Calbiochem (San Diego, CA), and Zinquin ester from Molecular Probes ... aldehydes release zinc from isolated proteins and in cultured cells and that the released zinc affects phos- phorylation signaling and gene expression. Results Aldehydes release zinc from z...

Ngày tải lên: 19/02/2014, 06:20

... purchased from Sigma. Restriction enzymes and Taq DNA polymerase were from Invitrogen. Amicon centrifugal filter units were from Millipore while DEAE-Sephacel and Sephacryl S-200 HR was purchased from ... return of hydride from NADH to the opposite face of the keto sugar results in epimerization of the substrate and regeneration of NAD + [1]. Epimerase has been purified and characteri...

Ngày tải lên: 19/02/2014, 12:20

... purchased from Novagen (Madison, WI, USA). Restriction enzymes, modifying enzymes, and PCR enzymes were from TaKaRa Bio (Kyoto, Japan). Crotalus atrox phosphodiesterase I was purchased from Sigma ... protein agrees with that of other APases [29,33]. Discussion The SCO2299 protein from S. coelicolor The SCO2299 gene from S. coelicolor was shown to encode a bifunctional enzyme consist...

Ngày tải lên: 19/02/2014, 18:20