This paper is concerned with the analysis of the observability of the discrete event systems (DES) modeled by interpreted Petri nets (IPN). This paper presents three major contributions on the field of the observability of DES. First, an observability definition for IPN is proposed. This definition is more precise than previous ones because it deals with the possibility of determining the syste...

Expression of aversive memories is key for survival, but the underlying brain mechanisms are not fully understood. Medial habenular (MHb) axons corelease glutamate and acetylcholine onto target postsynaptic interpeduncular (IPN) neurons, but their role in aversive memories has not been addressed so far. We found that cannabinoid type 1 receptors (CB1R), key regulators of aversive responses, are...

BACKGROUND The Internet and mobile devices are increasingly used by men who have sex with men to find potential partners. Lack of partner information, besides e-mail addresses or user profiles, limits the ability to adequately perform partner notification by traditional means and test those at high risk. To streamline North Carolina Internet Partner Notification (IPN) services, University of No...

BACKGROUND Early occurrence of immunosuppression is a risk factor for infected pancreatic necrosis (IPN) in the patients with acute pancreatitis (AP). However, current measures for the immune systems are too cumbersome and not widely available. Significantly decreased lymphocyte count has been shown in patients with severe but not mild type of AP. Whereas, the correlation between the absolute l...

1 Laboratorio Nacional de Informática Avanzada (LANIA A.C.) Rébsamen 80, Centro, Xalapa, Veracruz, 91000 MEXICO [email protected] 2 Autonomous University of Tlaxcala. Engineering and Technology Department Calz. Apizaquito s/n Km. 15, Apizaco Tlax. 90300 MEXICO [email protected] 3 CINVESTAV-IPN (Evolutionary Computation Group) Departamento de Computación Av. IPN No. 2508, Col. San Pedr...

1Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Avenida IPN 2508, 07360 Mexico, DF, Mexico 2Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 031, Peru 3School of Public Health, University of Texas, Houston, TX 77030, USA 4Division of Infectio...

A thickness gradient interpenetrating polymer network (IPN) was easily created that takes advantage of the relatively poor compatibility and curing rates discrepancy between epoxy (EP) and polyurethane (PU). Ultraviolet absorption spectrum (UV-Vis), thermogravimetric (TG), Differential scanning calorimetry (DSC), Dynamic thermomechanical analysis (DMA), Atomic force microscope (AFM) and water c...

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New semi-interpenetrating polymeric network (IPN) hydrogels based on chitosan and poly(acrylic acid), crosslinked with glutaraldehyde, were prepared by free radical polymerization method. IPN hydrogels were synthesized by simultaneous polymerization/crosslinking of acrylic acid monomer in the presence of chitosan and crosslinker. The structure and surface morphology of the IPN hydrogels were ch...