Abstract: A reciprocating metering device is disclosed. The metering device provides a mechanism for discharging a metered amount of material, such as rice seeds, into a reservoir formed by plunging the metering device into soil. The metering device operates in a reciprocating motion wherein, in a first position, the spear extends from the device to form the reservoir and the seeds are retained within the device and in a second position, the spear is retracted into the device and the seeds are able to be discharged out of the device and into the reservoir.

Abstract: A reciprocating metering device is disclosed. The metering device provides a mechanism for discharging a metered amount of material, such as rice seeds, into a reservoir formed by plunging the metering device into soil. The metering device operates in a reciprocating motion wherein, in a first position, the spear extends from the device to form the reservoir and the seeds are retained within the device and in a second position, the spear is retracted into the device and the seeds are able to be discharged out of the device and into the reservoir.

Abstract: A transdermal transport device includes a reservoir for holding a formulation of an active principle, a needle with a bore through which the formulation is transported between the reservoir and a target area of a biological body, and an impedance sensor. The impedance sensor has an electrode positioned to measure the impedance of a portion of the target area between the needle and the electrode to indicate the depth of penetration of the needle into the target area.

Abstract: A transdermal transport device includes a reservoir for holding a formulation of an active principle, a needle with a bore through which the formulation is transported between the reservoir and a target area of a biological body, and an impedance sensor. The impedance sensor has an electrode positioned to measure the impedance of a portion of the target area between the needle and the electrode to indicate the depth of penetration of the needle into the target area.

Abstract: An apparatus and method for analyzing visual and vestibular responses of a subject. One or more targets undergoing slow random motion are presented to the subject while the head of the subject is simultaneous perturbed with perturbations statistically uncorrelated with the random motion of the target. The response of the motion of the head of the subject and the motion of the subject's eyes is measured and the visual and vestibular system response dynamics are estimated based on the measured response.