1,721,044 research outputs found
ABSTRACT INTEGRATING PUBLIC KEY CRYPTOGRAPHY INTO THE SIMPLE NETWORK MANAGEMENT PROTOCOL (SNMP) FRAMEWORK
No full textwidely used for remote network resource management due to its simplicity and distributed management capabilities. However, the increased use of SNMP to manage and control network resources such as routers and servers also introduces security risks whereby unauthorized users can retrieve information or modify the given resources remotely. The basic security framework introduced in SNMPv3 only specifies the use of symmetric cryptography techniques to address the security concerns. This paper outlines a new methodology, Public-Key Security Model (PSM), to integrate public cryptography techniques into the SNMP framework. It extends the existing User-based Security Model (USM) to include per-session authentication and encryption keys, thus enhancing the security of the SNMPv3 protocol. I
Cognitive Radio-Based Power Adjustment For Wi-Fi.
Get PDFIn this paper the idea of using Cognitive Radio (CR) techniques to optimize the access point (AP) configuration for
IEEE 802.11 WLAN was exploited. In particular, we address the issue of optimizing AP transmission power and channel allocation within the network
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Adaptive and fuzzy approaches for nodes affinity management in wireless ad-hoc networks
No full textIn most of the ad-hoc routing protocols, a static link lifetime (LL) is used for a newly discovered neighbors. Though
this works well for networks with fixed infrastructures, it is inadequate for ad-hoc networks due to nodes mobility and frequent
breaks of links. To overcome this problem, routing protocols with estimated LL using nodes affinity were introduced. However,
these protocols also used the static estimated LL during the connection time. In contrast to that, in this paper two methods are
presented to estimate LL based on nodes affinity and then continually update those values depending on changes of the affinity.
In the first method, linear function is used to map the relationship between the signal strength fluctuation and LL. In the second
method, fuzzy logic system is used to map this relationship in a nonlinear fashion. Significance of the proposed methods is
validated using simulation. Results indicate that fuzzy method provides the most efficient and robust LL values for routing
protocols
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