1,722,166 research outputs found
On the security of the Yi-Tan-Siew chaotic cipher
Get PDFThis paper presents a comprehensive analysis on the security of the Yi-Tan-Siew chaotic cipher. A differential chosen-plaintext attack and a differential chosen-ciphertext attack are suggested to break the sub-key K, under the assumption that the time stamp can be altered by the attacker, which is reasonable in such attacks. Also, some security problems about the sub-keys α and β are clarified, from both theoretical and experimental points of view. Further analysis shows that the security of this cipher is independent of the use of the chaotic tent map, once the sub-key K is removed via the proposed suggested differential chosen-plaintext attack
Yi Tan Kim Pho et Ida Simon-Barouh : Le Cambodge des Khmers rouges, chronique de la vie quotidienne - CR de lecture par Clément Baillet
No full textCet ouvrage est le produit de la rencontre entre deux femmes : Yi Tan Kim Pho et Ida Simon-Barouh. Yi Tan Kim Pho était sage-femme à Phnom-Penh avant l'arrivée des Khmers rouges le 17 Avril 1975 ; elle avait alors vingt-quatre ans. Survivante du régime de Pol-Pot, elle s'exile en France en 1980. C'est en 1981 qu'elle rencontre Ida Simon-Barouh, ethnologue et chercheure au CNRS, spécialiste des relations inter-ethniques, des minorités et des migrations internationales[1]. En 1986, Yi Tan Kim P..
Vegetable Marketing Channels, Post-harvest and Adjustment in Taiwan
No full textThe vegetable production in Taiwan has been unstable in rainy spring, summer and winter
seasons. To maintain the balance between production and consumption demand, planned
production based on the amounts of domestic production/consumption and imports trade is
important, especially when the production and price is fluctuated. Those sensitive for production
and marketing vegetables include garlic, onion, cabbage, Chinese cabbage, and Welsh onion. Most
vegetables especially leafy vegetables are highly perishable. Cold chain system for vegetable
storage is an advanced operation compared to other traditional operations in postharvest handling
and marketing channels, which can reduce postharvest loss and maintain quality. To establish a
high efficiency agricultural marketing system of vegetables, cold chain system is necessary for
sustainable practices
On the security of the Yi-Tan-Siew chaotic cipher
No full textThis paper presents a comprehensive analysis on the security of the Yi-Tan-Siew chaotic cipher. A differential chosen-plaintext attack and a differential chosen-ciphertext attack are suggested to break the sub-key K, under the assumption that the time stamp can be altered by the attacker, which is reasonable in such attacks. Also, some security problems about the sub-keys α and β are clarified, from both theoretical and experimental points of view. Further analysis shows that the security of this cipher is independent of the use of the chaotic tent map, once the sub-key K is removed via the proposed suggested differential chosen-plaintext attack.Department of Electronic and Information Engineerin
Simon Barouh Ida et Tan Pho Yi, Le Cambodge des Khmers rouges. Chronique de la vie quotidienne. Récit de Yi Tan Kim Pho
No full textBrocheux Pierre. Simon Barouh Ida et Tan Pho Yi, Le Cambodge des Khmers rouges. Chronique de la vie quotidienne. Récit de Yi Tan Kim Pho . In: Vingtième Siècle, revue d'histoire, n°30, avril-juin 1991. p. 129
Simon Barouh Ida et Tan Pho Yi, Le Cambodge des Khmers rouges. Chronique de la vie quotidienne. Récit de Yi Tan Kim Pho
No full textBrocheux Pierre. Simon Barouh Ida et Tan Pho Yi, Le Cambodge des Khmers rouges. Chronique de la vie quotidienne. Récit de Yi Tan Kim Pho . In: Vingtième Siècle, revue d'histoire, n°30, avril-juin 1991. p. 129
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
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