Mechanical actuator for biomimetic propulsion and the effect of the caudal fin elasticity on the swimming performance

This paper presents a mechanical actuator for the biomimetic propulsion of swimming devices and the experimental study of the effect of the caudal fin elasticity on the overall performance. The design of the proposed drive allows the DC motor to operate at constant speed, so all the power of the motor is spent only for the motion of the caudal fin. A prototype of the actuator, in which the caudal fin serves as a driving element, is manufactured and tested in both laboratory and natural conditions. The swimming speed, the thrust efficiency and the maneuverability are evaluated for caudal fins with different stiffness. The caudal fin whose rigidity varies relative to both vertical and horizontal cross-section, exhibits the best performance. The achieved results also confirm that the proposed actuator could be of great interest to applications in the field of underwater operation, ocean investigation and environmental protection.

Sophisticated security verification on routing repaired balanced cell-based dual-rail logic against side channel analysis

Conventional dual-rail precharge logic suffers from difficult implementations of dual-rail structure for obtaining strict compensation between the counterpart rails. As a light-weight and high-speed dual-rail style, balanced cell-based dual-rail logic (BCDL) uses synchronised compound gates with global precharge signal to provide high resistance against differential power or electromagnetic analyses. BCDL can be realised from generic field programmable gate array (FPGA) design flows with constraints. However, routings still exist as concerns because of the deficient flexibility on routing control, which unfavourably results in bias between complementary nets in security-sensitive parts. In this article, based on a routing repair technique, novel verifications towards routing effect are presented. An 8 bit simplified advanced encryption processing (AES)-co-processor is executed that is constructed on block random access memory (RAM)-based BCDL in Xilinx Virtex-5 FPGAs. Since imbalanced routing are major defects in BCDL, the authors can rule out other influences and fairly quantify the security variants. A series of asymptotic correlation electromagnetic (EM) analyses are launched towards a group of circuits with consecutive routing schemes to be able to verify routing impact on side channel analyses. After repairing the non-identical routings, Mutual information analyses are executed to further validate the concrete security increase obtained from identical routing pairs in BCDL.

Deforming semistable Galois representations

Let V be a p-adic representation of Gal(Q̄/Q). One of the ideas of Wiles’s proof of FLT is that, if V is the representation associated to a suitable autromorphic form (a modular form in his case) and if V′ is another p-adic representation of Gal(Q̄/Q) “closed enough” to V, then V′ is also associated to an automorphic form. In this paper we discuss which kind of local condition at p one should require on V and V′ in order to be able to extend this part of Wiles’s methods.

L' Euphrate et le Tigre

par le Sr. d'Anville ; Guill. De La Haye.

Œuvres théologiques /

Includes bibliographical references and index.

Duroc, duc de Frioul : grand maréchal du Palais impérial (1772-1813)

Mode of access: Internet.

Philosophie du dix-huitième siècle;

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Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

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Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.

Collegia historica seu Quaestiones historiae criticae : ex institutionibus historicis ... extractae ... /

Mode of access: Internet.