摘要:
A method, program, and system for notarizing and verifying documents via a distributed computer network are provided by the present invention. The invention includes creating an electronic version of the document on a client computer in the network and inserting a pre-written acknowledgment template into said electronic document, wherein the acknowledgment template complies with local legal formalities for a certified party that has authority by law to verify and authenticate the signer of a document. The document is then encrypted and stored on a secure server in the computer network, wherein the stored electronic document may be retrieved by any client in the computer network. The signing party is then notified of the electronic document's identity and directed to the location of a certified notary within the signing party's geographic vicinity. The signing party visits the notary and retrieves the electronic document on the notary's client computer. The signing party then electronically signs the document using an electronic writing pad. The notary verifies the transaction and affixes his electronic signature to the document and also affixes an electronic image of his notary seal to the document and saves it on the server. Any certified notary in the network may then retrieve the signed, notarized document.
摘要:
An apparatus and method for high power amplification in a multimode fiber amplifier. The apparatus includes a diffraction limited low power laser, a multimode fiber amplifier, and a lens. The multimode fiber amplifier is coupled to the low power laser to amplify the low power laser output. The multimode fiber amplifier has a length that is set to a phase-matching length at which the transverse modes of the multimode fiber amplifier are in phase. The lens is coupled to the multimode fiber amplifier and outputs a kilowatt (KW)-level, diffraction-limited output beam from the multimode fiber amplifier.
摘要:
A laser array architecture scalable to very high powers by fiber amplifiers, but in which the output wavelength is selectable, and not restricted by the wavelengths usually inherent in the choice of fiber materials. A pump beam at a first frequency is amplified in the fiber amplifier array and is mixed with a secondary beam at a second frequency to yield a frequency difference signal from each of an array of optical parametric amplifiers. A phase detection and correction system maintains the array of outputs from the amplifiers in phase coherency, resulting in a high power output at the desired wavelength. A degenerate form of the architecture is disclosed in an alternate embodiment, and a third embodiment employs dual wavelength fiber amplifiers to obtain an output at a desired difference frequency.
摘要:
Methods and apparatus are provided for modifying a free electron laser (FEL) to produce a non-diverging laser beam. A relativistic electron beam is converted to a Bessel beam in an FEL resonator with conical end mirrors, and the Bessel beam is coupled to the optical field within the laser resonator. The resultant laser beam is propagated with minimal divergence, and is wave corrected at the resonator output to produce a uniform intensity circular beam. The laser beam can be of smaller diameter than that of a conventional resonator due to its diffractionless propagation, which enables the magnetic structure gap within the resonator to be smaller, thus producing a higher optical gain.
摘要:
A surgical tool and method are provided for positioning an intervertebral device between vertebral members. The tool includes an elongate shaft, an anti-rotation sleeve, and an actuation mechanism. The shaft has proximal and distal ends, with the distal end of the shaft including an engagement member for releasably engaging an intervertebral device. The sleeve includes proximal and distal ends, and is movably mounted to the shaft for reciprocating relative thereto between retracted and extended positions. The distal end of the sleeve includes an anti-rotation member. The actuation mechanism controls positioning of the sleeve between the retracted and extended positions, and locks the sleeve relative to the shaft. When the intervertebral device is releasably engaged by the engagement member, and the sleeve is in the extended position, the anti-rotation member engages the intervertebral device and prevents rotation of the intervertebral device when releasing the engagement member from the intervertebral device.
摘要:
An optical fiber amplifier array and related method, in which high beam quality is achieved by varying the frequency of an input signal applied to all of the fiber amplifiers, to locate a frequency at which the amplifiers produce nearly coherent optical outputs. In spite of statistical variations in length and other factors among the fibers, there are frequencies at which the amplifiers produce nearly coherent outputs. In the control system of the invention, the input signal frequency is scanned across a selected narrow range and the beam quality is monitored by measuring on-axis far-field output beam intensity. The frequency is scanned until the beam intensity exceeds a selected threshold, and then the frequency is held constant until the beam intensity falls below a second selected threshold.
摘要:
Systems and methods for providing access to product license information include validating a license redemption record when a customer redeems a software license via a license server. A customer site identifier is associated with the license redemption record, and a customer data warehouse is formed that includes license redemption records associated with the same customer site identifier. A customer associated with the site identifier can access the license redemption records in the customer data warehouse.
摘要:
Windrow shields that pivot adjacent the forward ends thereof into and out of the path of crop material to control the width of the windrow. An electric motor and linkage to the shields allows the special relationship between the shields to be adjusted on-the-go from the operator's location.
摘要:
The present invention relates generally to synthetic genes for modifying endogenous gene expression in a cell, tissue or organ of a transgenic organism, in particular a transgenic animal or plant. More particularly, the present invention provides novel synthetic genes and generic constructs which are capable of repressing delaying or otherwise reducing the expression of an endogenous gene or a target gene in an organism when introduced thereto.
摘要:
A method, program, and system for notarizing and verifying documents via a distributed computer network are provided by the present invention. The invention includes creating an electronic version of the document on a client computer in the network, which is then encrypted and stored on a secure server in the computer network, wherein the stored electronic document may be retrieved by any client in the computer network. The signing party is then notified of the electronic document's identity and directed to the location of a certified notary within the signing party's geographic vicinity. The signing party visits the notary and retrieves the electronic document on the notary's client computer. The signing party then electronically signs the document using an electronic writing pad. The notary verifies the transaction and affixes his electronic signature to the document and also affixes an electronic image of his notary seal to the document and saves it on the server. Any certified notary in the network may then retrieve the signed, notarized document.