Abstract:
An electromagnetic vibrator has a movable magnet that can move linearly in an axial direction. A field coil surrounds the movable magnet. Magnetic bumpers are disposed on opposite ends of the vibrator, and are oriented to repel the movable magnet. When an alternating current is provided in the field coil, the movable magnet oscillates linearly in the axial direction, bumping against the magnetic field of the bumper magnets and thereby creating vibration. The movable magnet may have a toroidal shape and be disposed on an axial shaft to linearly constrain the motion of the movable magnet. Two field coils can be provided to simultaneously create push and pull forces on the movable magnet. The bumper magnets can be replaced with compression springs. The electromagnetic vibrator can be very small and energy efficient; it is well suited for use in portable electronic devices, cell phones, toys, industrial mixers, and massage devices.
Abstract:
This invention incorporates the use of bioimpedance measurements of intact cells to classify and characterize any unique global cellular event such as signal transduction from ligand/receptor interactions, cytotoxicity, apoptosis, tumor cell progression, or stem cell differentiation. Specifically, we have demonstrated that this invention can classify signal transduction pathways from G-protein coupled, tyrosine kinase, and nuclear receptors.
Abstract:
An electromagnetic vibrator (Figure 2) has a movable magnet (20) that can move linearly in an axial direction. A field coil (28a, 28b) surrounds the movable magnet. Magnetic bumpers (26a, 26bO are disposed on opposite ends of the vibrator, and are oriented to repel the movable magnet.
Abstract:
As disclosed within, the present device is directed to a multi-well sample module having integrated impedance measuring electrodes (which allow for the generation of an electric field within each well and the measuring of the change in impedance of each of the well's contents) and an electrical connection scheme allowing simultaneous measurement of each well's change in impedance.
Abstract:
As disclosed within, the present device is directed to a multi-well sample module having integrated impedance measuring electrodes (which allow for the generation of an electric field within each well and the measuring of the change in impedance of each of the well's contents) and an electrical connection scheme allowing simultaneous measurement of each well's change in impedance.
Abstract:
The invention relates to noise or sound control achieved by enclosing the noise source in an active enclosure (10). Arrays of vibration inputs such as shakers, piezoceramic, etc. (14, 15) are attached to the walls of the active enclosure, or loudspeakers located inside the enclosure can be used to excite the sites of the enclosure. An array of error microphones are located in the radiated acoustic field or PVDF strips (20, 21, 22) are positioned on the wall. A controller (19) senses the levels of sound observed at the error microphones (16, 17, 18) or PVDF film (20, 21, 22) and adjusts the oscillating inputs (in terms of frequency, content, phase and magnitude) to the active vibration inputs in order to minimize the radiated sound.