An information agent is viewed as a deductive database consisting of 3 parts: • an observation database containing the facts the agent has observed or sensed from its surrounding environment. • an input database containing the information the agent has obtained from other agents • an intensional database which is a set of rules for computing derived information from the information stored in th...

We describe a case of late-onset remarkable depigmentation of a small aperture corneal inlay implanted for presbyopia compensation. The patient was a participant in a clinical trial designed to evaluate the safety and efficacy of the AcuFocusTM ACU-10R160, which is a 10 µm-thick polyimide film tinted with an organic dye. Inlay implantation occurred under mechanical microkeratome Lasik flaps set...

1.1.1 Historical Background of In Vitro Ocular Irritation/Corrosion Test Methods and Rationale for Their Development The location of the eye and its anatomy predisposes it to exposure to a variety of environmental conditions (e.g., ozone, pollen) and substances on a daily basis. Injury from ocular exposure to a variety of chemical agents can lead to a range of adverse effects with the most extr...

The method used to produce "Connaught" tuberculin purified protein derivative (PPD) is described. The tuberculin PPD for the multiple-puncture method was shown to be stable for at least 24 months at 5 C; tuberculin PPD for the intracutaneous method was shown to be stable at 5 C and 24 C for a period of 18 months in the presence of Tween 80. Evans blue or brillant vital red was added to tubercul...

this is particularly true of the chapter on Comparative Physiology. The general nature of the subject matter and the broadness of scope employed make this text particularly adapted to the needs of those students whose chief aim is to obtain a year's work in Zoology from a cultural standpoint. A review of this text without reference to its mechanical features, would do it an injustice. The bindi...

background: a glass injury to the wrist and forearm is a common condition in adults and children that may cause significant discomfort and disability. this study was conducted to evaluate the accuracy of preoperative examination of this injury. methods: in this prospective study, among patients referred to kashani hospital in isfahan, iran from august 2006 to march 2008, 150 patients with glass...

in this paper, the performance evaluation of a two-way hybrid photovoltaic/thermal (pv/t) solar collector was analytically and experimentally carried out. mathematical expressions for operating parameters in glass to glass and glass to tedlar pv/t solar collectors were developed and experimentally validated by a glass to tedlar pv/t solar collector system. also the influence of air flow rate on...

porous hollow glass microspheres have many uses, including encapsulation of active materials. in this paper a fast and facile method for fabricating porous hollow glass-microspheres was demonstrated by etching them using dilute hydrofluoric acid. then, a highly reactive amine was infiltrated into the etched glass microspheres. scanning electron microscopy was conducted for the hollow glass micr...

Oxynitride glasses are found as grain boundary phases in silicon nitride ceramics. They are effectively alumino-silicate glasses in which nitrogen substitutes for oxygen in the glass network, and this causes increases in glass transition and softening temperatures, viscosities (by two to three orders of magnitude), elastic moduli and microhardness. Calcium silicate-based glasses containing fluo...