1,720,970 research outputs found
RFC3450: Asynchronous Layered Coding (ALC) Protocol Instantiation
No full textThis document describes the Asynchronous Layered Coding (ALC)
protocol, a massively scalable reliable content delivery protocol.
Asynchronous Layered Coding combines the Layered Coding Transport
(LCT) building block, a multiple rate congestion control building
block and the Forward Error Correction (FEC) building block to
provide congestion controlled reliable asynchronous delivery of
content to an unlimited number of concurrent receivers from a single
sender
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
RFC 3451: Layered Coding Transport (LCT) Building Block
No full textLayered Coding Transport (LCT) provides transport level support for
reliable content delivery and stream delivery protocols. LCT is
specifically designed to support protocols using IP multicast, but
also provides support to protocols that use unicast. LCT is
compatible with congestion control that provides multiple rate
delivery to receivers and is also compatible with coding techniques
that provide reliable delivery of content
RFC3452: Forward Error Correction (FEC) Building Block
No full textThis document generally describes how to use Forward Error Correction
(FEC) codes to efficiently provide and/or augment reliability for
data transport. The primary focus of this document is the
application of FEC codes to one-to-many reliable data transport using
IP multicast. This document describes what information is needed to
identify a specific FEC code, what information needs to be
communicated out-of-band to use the FEC code, and what information is
needed in data packets to identify the encoding symbols they carry.
The procedures for specifying FEC codes and registering them with the
Internet Assigned Numbers Authority (IANA) are also described. This
document should be read in conjunction with and uses the terminology
of the companion document titled, "The Use of Forward Error
Correction (FEC) in Reliable Multicast"
RFC3453: The Use of Forward Error Correction (FEC) in Reliable Multicast
No full textThis memo describes the use of Forward Error Correction (FEC) codes
to efficiently provide and/or augment reliability for one-to-many
reliable data transport using IP multicast. One of the key
properties of FEC codes in this context is the ability to use the
same packets containing FEC data to simultaneously repair different
packet loss patterns at multiple receivers. Different classes of FEC
codes and some of their basic properties are described and
terminology relevant to implementing FEC in a reliable multicast
protocol is introduced. Examples are provided of possible abstract
formats for packets carrying FEC
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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