Experimental investigation has been carried out for dissociation/ionisation of methyl bromide using time of flight mass
spectrometer, then, the mass signals were assigned to H+, CHm+ (m= 0-3), iBr+ (i = 79, 81), and the main processes of
multi-photon ionization and dissociation of CH3Br were given.
This paper presents a noninvasive approach in vivo measurement of eye stiffness based on a force–displacement
relationship, which is based on a new contact-probe method of simultaneously measuring the static force and
displacement. First, a simple spherical eye model is introduced for deriving analytical eye stiffness when a static force is
applied to an eye. Next, a measurement system for simultaneously measuring force and displacement when a probe is
pressed onto the eye is presented. Static eye stiffness is defined which based on the measured force–displacement
relationship. A photoelectric probe transducer acts as displacement detector. A 16-bit single-chip microprocessor with
E2PROM in the electronic circuit played the role of a nucleus, which stored the program instructions and the interrelated
data. Laboratory experiments were carried out on a simulated eyeball connected to a hydraulic manometer to obtain
intraocular pressure at different levels. The experimental results show that the measured eye stiffness nicely matches the
analytical result.
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