Abstract: This study evaluates the energy performance from the use of daylight through the window with horizontal slats installed between two glazing panes (slat window). Two mathematical models were validated with experiments and were adopted to determine the heat gain and the daylight transmission through the slat window under the tropical sky and climate. The results show that the daylight use from the slat window is energy efficient compared with the case of heat reflective glass that interior lighting is fully reliance on electric lamps. However, the daylighting through the slat window has to be implemented with care for shallow rooms with low values of required interior illuminance in order to avoid excessive heat gain to airconditioning system.

• Publication Date: 22-Feb-2015
• DOI: 10.15224/978-1-63248-040-8-35
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Abstract: We develop a new approach to the stability analysis of Hopfield-type neural networks with time varying delays in the presence of impulses. With the new approach, we improve and generalize some previous works of other researchers. We study stability of equilibrium points of impulsive systems which are either a generalization of those existing or new. This paper deals with the problem of delaydependent stability criterion of delay-difference system with multiple delays of Hopfield neural networks. Based on quadratic Lyapunov functional approach and free-weighting matrix approach, some linear matrix inequality criteria are found to guarantee delay-dependent asymptotical stability of these systems.

• Publication Date: 22-Feb-2015
• DOI: 10.15224/978-1-63248-040-8-36
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