A Hypercube Queuing Model Approach for the Location Optimization Problem of Emergency Vehicles for Large-Scale Study Areas

Natural SARS-CoV-2 infection in pets has been widely documented during the last year. Although the majority of reports suggested that dogs’ susceptibility to the infection is low, little is known about viral pathogenicity and transmissibility in the case of variants of concern, such as B.1.1.7 in this species. Here, as part of a large-scale study on SARS-CoV-2 prevalence in pets in Spain, we have detected the B.1.1.7 variant of concern (VOC) in a dog whose owners were infected with SARS-CoV-2. The animal did not present any symptoms, but viral loads were high in the nasal and rectal swabs. In addition, viral isolation was possible from both swabs, demonstrating that the dog was shedding infectious virus. Seroconversion occurred 23 days after the first sampling. This study documents the first detection of B.1.1.7 VOC in a dog in Spain and emphasizes the importance of performing active surveillance and genomic investigation on infected animals.

Download Full-text

A large-scale study of ionic liquids employed in chemistry and energy research to reveal cytotoxicity mechanisms and to develop safe design guide

Green Chemistry ◽

10.1039/d1gc01520f ◽

2021 ◽

Author(s):

Lilya U. Dzhemileva ◽

Vladimir Anatolievich D'yakonov ◽

Marina M. Seitkalieva ◽

Natalia Kulikovskaya ◽

Ksenia S. Egorova ◽

...

Keyword(s):

Ionic Liquids ◽

Life Cycle ◽

Large Scale ◽

Energy Research ◽

Organic Electrolytes ◽

Large Scale Study ◽

Design Guide ◽

Scientific Potential

Device-level applications of organic electrolytes unavoidably imply extensive contacts with the environment. Despite their excellent scientific potential, ionic liquids (ILs) cannot be approved for practical usage until their life cycle...

Download Full-text

Tu1508 PREDICTORS FOR DEVELOPMENT OF COMPLETE AND INCOMPLETE INTESTINAL METAPLASIA (IM) ASSOCIATED WITH HELICOBACTER PYLORI INFECTION: A LARGE-SCALE STUDY FROM LOW PREVALENCE AREA OF GASTRIC CANCER (IM-HP TRIAL)

Gastrointestinal Endoscopy ◽

10.1016/j.gie.2020.03.3680 ◽

2020 ◽

Vol 91 (6) ◽

pp. AB596-AB597

Author(s):

Natsuda Aumpan ◽

Bubpha Pornthisarn ◽

Soonthorn Chonprasertsuk ◽

Sith Siramolpiwat ◽

Patommatat Bhanthumkomol ◽

...

Keyword(s):

Gastric Cancer ◽

Helicobacter Pylori ◽

Intestinal Metaplasia ◽

Large Scale ◽

Helicobacter Pylori Infection ◽

Large Scale Study ◽

Low Prevalence

Download Full-text

Dynamic output feedback control for nonlinear large-scale interconnected systems

COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ◽

10.1108/compel-10-2019-0427 ◽

2020 ◽

Vol 39 (4) ◽

pp. 801-821

Author(s):

Ezzeddine Touti ◽

Ali Sghaier Tlili ◽

Muhannad Almutiry

Keyword(s):

Decentralized Control ◽

Output Feedback ◽

Large Scale ◽

Optimization Problem ◽

Lyapunov Theory ◽

Interconnected Systems ◽

Dynamic Output Feedback ◽

Content Type ◽

Dynamic Output ◽

Control Scheme

Purpose This paper aims to focus on the design of a decentralized observation and control method for a class of large-scale systems characterized by nonlinear interconnected functions that are assumed to be uncertain but quadratically bounded. Design/methodology/approach Sufficient conditions, under which the designed control scheme can achieve the asymptotic stabilization of the augmented system, are developed within the Lyapunov theory in the framework of linear matrix inequalities (LMIs). Findings The derived LMIs are formulated under the form of an optimization problem whose resolution allows the concurrent computation of the decentralized control and observation gains and the maximization of the nonlinearity coverage tolerated by the system without becoming unstable. The reliable performances of the designed control scheme, compared to a distinguished decentralized guaranteed cost control strategy issued from the literature, are demonstrated by numerical simulations on an extensive application of a three-generator infinite bus power system. Originality/value The developed optimization problem subject to LMI constraints is efficiently solved by a one-step procedure to analyze the asymptotic stability and to synthesize all the control and observation parameters. Therefore, such a procedure enables to cope with the conservatism and suboptimal solutions procreated by optimization problems based on iterative algorithms with multi-step procedures usually used in the problem of dynamic output feedback decentralized control of nonlinear interconnected systems.

Download Full-text