We investigate resilient control strategies for linear systems under Denial-of-Service (DoS) attacks. By DoS attacks we mean interruptions of communication on measurement (sensor-to-controller) and control (controller-to-actuator) channels carried out by an intelligent adversary. We characterize the duration of these interruptions under which stability of the closed-loop system is preserved. Th...

Department of Bioscience and Buccal Diagnosis, São Jose dos Campos School of Dentistry, State University of São Paulo – UNESP, Av. Engenheiro Francisco José Longo, 777, 12245-000 São José dos Campos SP, Brazil National Institute of Technology, Av. Venezuela, 200, Centro, Rio de Janeiro RJ, Brazil Department of Materials, Air and Space Institute, CTA, Praça Mal. do Ar Eduardo Gomes, 14, 12904-00...

A recent escalation of application layer Denial of Service attacks (DoS) on the Internet has quickly shifted the focus of the research community from traditional network-based denial of service. As a result, new varieties of attacks were explored: slow-rate and low-rate application layer DoS attacks. In this chapter, after a brief introduction of application layer DoS attacks, we discuss the ch...

Rodrigo Siqueira-Batista1, Mauro Geller2 and Andréia Patrícia Gomes3 1Professor of Internal Medicine, Neuroscience and Immunology/Microbiology, Centro Universitário Serra dos Órgãos (UNIFESO); 2Professor of Immunology and Microbiology, Centro Universitário Serra dos Órgãos (UNIFESO); Coordinator of Genodermatosis, Genetic Services, Instituto Puericultura e Pediatria Martagão Gesteira (IPPMG), F...

This paper addresses the stabilization of quantized linear systems under Denial-of-Service (DoS) attacks. Using a state transformation that satisfies a certain norm condition, we first propose an output encoding method that achieves the stabilization of systems with finite-data rates only under an assumption on the duration of DoS attacks. Next we add a condition on the frequency of DoS attacks...

The vibrational density of states DOS of hydrogen trapped at dislocations in deformed PdH0.0008 has been measured at 4 and 295 K with incoherent inelastic neutron scattering. The vibrational DOS at 4 K exhibits features characteristic of the low-temperature -Pd hydride phase while the characteristic peak in the 295 K DOS corresponds to the solid-solution -Pd phase. This is evidence of a → trans...

animals that breed in ground holes can be exposed to higher doses of radiation from natural radioactive isotopes, including radon and its daughters, present in soil air. one of such species is the sand martin riparia riparia. examination of natural burrows in sand mines revealed radon levels of 2.82-1320 bq/m3 in the examined soil horizon where martins dug their burrows. it was shown that adult...

background: changes in body composition may be used for monitoring progression/ regression of a disease. prompt γ-rays in vivo neutron activation analysis (ivnaa) has been widely used for the measurement of body composition in recent years. objective: in this paper, we tried to improve the safety of ivnaa operator. methods: the most important factor for reducing the operator receiving dose is t...

well-defined crystalline pbse nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using pb2+- edta and pb2+- oleylamine complexes at 180°c for different reaction times. composition and morphology of the samples have been characterized by means of xrd and sem. gradual release process of pb2+ from pb2+-edta and pb2+-oleylamine complexes can adjust the growth ra...