1,721,084 research outputs found
Propose a new Firefly-Fast Learning Network model based Intrusion-Detection System
No full textCurrently, effective Intrusion-detection systems
(IDS) still represent one of the important security tools. However,
hybrid models based on the IDS achieve better results compared
with intrusion detection based on a single algorithm. But even so,
the hybrid models based on traditional algorithms still face
different limitations. This work is focused on providing two main
goals; firstly, analysis based on the main methods and limitations
of the most-recent hybrid model-based on intrusion detection,
secondly, to propose a novel hybrid IDS model called FA-FLN
based on the Firefly algorithm and Fast Learning Network
Discontinuous surface profile measurement using wavelength scanning interferometry
No full text학위논문(석사) - 한국과학기술원 : 기계공학전공, 2001.8, [ v, 93 p ]한국과학기술원 : 기계공학전공
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Effect of Gas Hydrate Saturation on Hydraulic Conductivity of Marine Sediments
No full textMethane gas, one of the unconventional energy sources, is stored under the seabed or permafrost as a form of gas hydrate. Numerous countries are researching gas hydrate production. One of the production methods is depressurization which induces
the dissociation of gas hydrates by pumping pore water through the production well. The water pumping reduces the pore pressure lower than the equilibrium pressure of the gas hydrates. Thus, the dissociation rate and gas productivity are significantly
dependent on the water permeability (i.e., hydraulic conductivity) in hydrate-bearing sediments. The hydraulic conductivity of hydrate-bearing sediments is considerably affected by gas hydrate saturation because the gas hydrates generally exist as a porefilling and fracture-filling solid in the sediment pores. Therefore, the purpose of this research was to determine the correlation between gas hydrate saturation and hydraulic conductivity in sediments through various laboratory experiments. In the
experiment, gas hydrates were synthesized in a high pressure oedometer cell, with an artificial specimen which has a similar grain size distribution with a recovered core sample from the Ulleung basin of Korea. Gas hydrate formation and dissociation were
monitored by geophysical sensors including P-and S-wave and electrical resistivity sensors. The experimental results suggest there is an empirical relationship between gas hydrate saturation and water permeability in gas hydrate-bearing sediments
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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