1,893 research outputs found
Event detection from click-through data via query clustering
The web is an index of real-world events and lot of knowledge can be mined from the web resources and their derivatives. Event detection is one recent research topic triggered from the domain of web data mining with the increasing popularity of search engines. In the visitor-centric approach, the click-through data generated by the web search engines is the start up resource with the intuition: often such data is event-driven. In this thesis, a retrospective algorithm is proposed to detect such real-world events from the click-through data. This approach differs from the existing work as it: (i) considers the click-through data as collaborative query sessions instead of mere web logs and try to understand user behavior (ii) tries to integrate the semantics, structure, and content of queries and pages (iii) aims to achieve the overall objective via Query Clustering. The problem of event detection is transformed into query clustering by generating clusters - hybrid cover graphs; each hybrid cover graph corresponds to a real-world event. The evolutionary pattern for the co-occurrences of query-page pairs in a hybrid cover graph is imposed for the quality purpose over a moving window period. Also, the approach is experimentally evaluated on a commercial search engine\u27s data collected over 3 months with about 20 million web queries and page clicks from 650000 users. The results outperform the most recent work in this domain in terms of number of events detected, F-measures, entropy, recall etc. --Abstract, page iv
Exclusion Principle for Quantum Dense Coding
We show that the classical capacity of quantum states, as quantified by its
ability to perform dense coding, respects an exclusion principle, for arbitrary
pure or mixed three-party states in any dimension. This states that no two
bipartite states which are reduced states of a common tripartite quantum state
can have simultaneous quantum advantage in dense coding. The exclusion
principle is robust against noise. Such principle also holds for arbitrary
number of parties. This exclusion principle is independent of the content and
distribution of entanglement in the multipartite state. We also find a strict
monogamy relation for multi-port classical capacities of multi-party quantum
states in arbitrary dimensions. In the scenario of two senders and a single
receiver, we show that if two of them wish to send classical information to a
single receiver independently, then the corresponding dense coding capacities
satisfy the monogamy relation, similar to the one for quantum correlations.Comment: v2: 6 pages, RevTeX 4, title changed, previous results unchanged, new
results adde
Assessment of Use and Utilisation of Library Resources, Services and Facilities by Law Students at Kristu Jayanti College of Law, Bangalore
The main aim of this study is to investigate the use of library resources, services and facilities by law students;
it is mainly focused on use, purpose and satisfaction level with the library collection, services and facilities. This
study used survey method to collect data. A well-structured questionnaire was distributed. Out of 110, only
91(83%) questionnaires were collected and select for analysis. Result revelled that library services and collection
were satisfied further findings show users are not aware about Journals and E-Resources. So, study recommends
that should conduct information literacy programme to promote awareness use of library services and use of
resource
Effect of Yttrium Oxide Dispersion on the Microstructure and Properties of Tungsten Heavy Alloys
Tungsten heavy alloys are considered as two phase composites with 88 to 97 wt% tungsten interspersed in a matrix of relatively low melting elements such as nickel, iron and cobalt. The mechanical properties of these alloys are greatly influenced by the microstructural features such as tungsten grain size, tungsten-tungsten contiguity and matrix volume fraction. Oxide dispersion strengthening (ODS), refinement of tungsten grain size, cyclic heat treatment, addition of alloying elements like Cr, Mo, and Co are some of the methods investigated to improve the microstructural features and thereby the mechanical properties of tungsten heavy alloys. Among these methods ODS has been considered as a promising processing technique since the tungsten grain size observed in ODS alloys is finer compared to the conventional alloys and more importantly the dynamic fracture mode changes from adiabatic shear band to brittle fracture. The present study is mainly focused on investigating the effect of 0.3 wt% yttrium oxide (Y2O3) dispersion on the microstructure and consequently the tensile properties of 90W-6Ni-2Fe-2Co alloy. With 0.3 wt%Y2O3, the ODS alloy (89.7W-6Ni-2Fe-2Co-0.3Y2O3) is processed by two-stage sintering with subsequent thermo-mechanical treatment which includes vacuum heat treatment and swaging. ODS alloy and the conventional alloy (without oxides) are compared based on the microstructures and tensile properties obtained after liquid phase sintering and after final processing
Tungsten Heavy Alloys with Two phase Matrix
WNiCo alloys subjected to a two-stage or cyclic heat treatment develop a unique microstructure wherein apart from tungsten grains and matrix phase, fine tungsten precipitates are distributed in the matrix. This is unlike conventional heavy alloys such as WNiFe and WNiFeCo where the matrix is single phase without any secondary microstructural features. The purpose of developing a two-phase matrix is to realise superior mechanical properties compared to conventional alloys, especially strength with comparable or superior elongation and impact toughness. This advantage has rendered WNiCo alloys (with two-phase matrix) suitable candidates for advanced kinetic energy penetrators. The present study focusses on processing 92W-5Ni-3Co alloy using cyclic heat treatment and optimisation of parameters involved in cyclic heat treatment as well as subsequent vacuum heat treatment. Any refinement in processing parameters will help in improving the mechanical properties given the fact that processing parameters, microstructural features and mechanical properties are strongly interdependent in the case of tungsten heavy alloys
Limited post-operative narcotic use in elective laparoscopic cholecystectomy
Purpose:
To limit narcotics use
Cochrane review: multiple studies have shown postoperative pain can be managed with non-narcotic meds with good outcome
Less medication related side effects:N/V, constipation, disorientation
Prevents substance addiction/abusehttps://jdc.jefferson.edu/patientsafetyposters/1069/thumbnail.jp
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