Existence of APAV(q,k) with q a prime power ≡5(mod8) and k≡1(mod4)

AbstractStinson introduced authentication perpendicular arrays APAλ(t,k,v), as a special kind of perpendicular arrays, to construct authentication and secrecy codes. Ge and Zhu introduced APAV(q,k) to study APA1(2,k,v) for k=5, 7. Chen and Zhu determined the existence of APAV(q,k) with q a prime power ≡3(mod4) and odd k>1. In this article, we show that for any prime power q≡5(mod8) and any k≡1(mod4) there exists an APAV(q,k) whenever q>((E+E2+4F)/2)2, where E=[(7k−23)m+3]25m−3, F=m(2m+1)(k−3)25m and m=(k−1)/4

An AI for a Modification of Dou Di Zhu

We describe our implementation of AIs for the Chinese game Dou Di Zhu. Dou Di Zhu is a three-player game played with a standard 52 card deck together with two jokers. One player acts as a landlord and has the advantage of receiving three extra cards, the other two players play as peasants. We designed and implemented a Deep Q-learning Neural Network (DQN) agent to play the Dou Di Zhu. At the same time, we also designed and made a pure Q-learning based agent as well as a Zhou rule-based agent to compare with our main agent. We show the DQN model has a 10% higher win rate than the Q-learning model and Zhou rule-based model when playing as the landlord, and a 5% higher win rate than the other models when playing as a peasant

Game Theory Meets Network Security: A Tutorial at ACM CCS

The increasingly pervasive connectivity of today's information systems brings up new challenges to security. Traditional security has accomplished a long way toward protecting well-defined goals such as confidentiality, integrity, availability, and authenticity. However, with the growing sophistication of the attacks and the complexity of the system, the protection using traditional methods could be cost-prohibitive. A new perspective and a new theoretical foundation are needed to understand security from a strategic and decision-making perspective. Game theory provides a natural framework to capture the adversarial and defensive interactions between an attacker and a defender. It provides a quantitative assessment of security, prediction of security outcomes, and a mechanism design tool that can enable security-by-design and reverse the attacker's advantage. This tutorial provides an overview of diverse methodologies from game theory that includes games of incomplete information, dynamic games, mechanism design theory to offer a modern theoretic underpinning of a science of cybersecurity. The tutorial will also discuss open problems and research challenges that the CCS community can address and contribute with an objective to build a multidisciplinary bridge between cybersecurity, economics, game and decision theory

Conformally flat manifolds with nonnegative Ricci curvature

revised version, added reference to previous paper by S. Zhu on the same subjectInternational audienceWe show that complete conformally flat manifolds of dimension n>2 with nonnegative Ricci curvature enjoy nice rigidity properties: they are either flat, or locally isometric to a product of a sphere and a line, or are globally conformally equivalent to flat space or to a spherical spaceform. This extends previous works by Q.-M. Cheng, M.H. Noronha, B.-L. Chen and X.-P. Zhu, and S. Zhu

Comment on "A special attack on the multiparty quantum secret sharing of secure direct communication using single photons"

In this comment, we show that the special attack [S.-J. Qin, F. Gao, Q.-Y. Wen, F.-C. Zhu, Opt. Commun. 281 (2008) 5472.], which claims to be able to obtain all the transmitted secret message bit values of the protocol of the multiparty quantum secret sharing of secure direct communication using single photons with random phase shift operations, fails. Furthermore, a class of similar attacks are also shown to fail to extract the secrete message.Comment: 2 pages (two-column

Science Press, Beijing, China: Fauna Sinica Arachnida: Araneae [Rezension]

a) Song Daxiang & Zhu Mingsheng: Thomisidae, Philodromidae. 1997, 259 S., ISBN 7-03-005707-4/Q.684, Preis 44,- Yuan (ca. 9,68 DM) b) Zhu Mingsheng: Theridiidae. 1998, 436 S., ISBN 7-03-006243-4/Q.748, Preis 69,- Yuan (ca. 15,18 DM) c) Yin Changmin et al.: Araneidae. 1997, 460 S., ISBN 7-03-005705-8/Q.682, Preis 76,- Yuan (ca. 16,72 DM) Alle drei Bücher wurden Überwiegend in chinesisch verfaßt. Es findet sich jedoch ein englischer Bestimmungsschlüssel am Ende jedes Werkes. Ihm angeschlossen ist ein Artregister in lateinischer Schrift. Die Zeichnungen der Genitalien und des Habitus sind sehr deutlich und lassen sich in ihrer Genauigkeit sicherlich mit den Zeichnungen M.J. Roberts vergleichen. Die Beschreibungen zur Biogeographie werden zwar im Einführungsteil (Karten) dargestellt, die zugehörigen Textpassagen sind aber in chinesisch geschrieben worden

KatharoSeq Enables High-Throughput Microbiome Analysis from Low-Biomass Samples

Minich JJ, Zhu Q, Janssen S, et al. KatharoSeq Enables High-Throughput Microbiome Analysis from Low-Biomass Samples. mSystems. 2018;3(3):e00218-17