Abstract: The invention is a system for the in-situ monitoring of additive manufacturing. The system, without pre-calibration of a test sample, utilizes ultrasonic waves to conduct a layer-by-layer analysis of a three-dimensional component as it is being developed on a build plate. Resonant frequencies for each layer is measured and the difference between the resonant frequencies of consecutive layers are calculated to define a baseline frequency. Similarities or differences in baseline frequencies are used to validate the integrity of the layers of the component, and also to determine if structural inconsistencies exists. Based on these determinations, the system decides whether to continue printing or to halt printing.

Abstract: An online teaching method, including the steps of: under control of a control center of an online teaching system, identifying authentication and associating account with a student in response to a request of accessing to an online platform of the online teaching system from the student; providing teaching videos in stages which are cut into segments for the student; providing feedback information interacting between the student and a plurality of teachers; grading the student by analyzing the teaching videos that the student recorded; and determining the graduation of the student by the judgement of the student teaching others.

Abstract: A nutritional supplement includes a predetermined amount of an ATP increasing herbal component which includes species of cordyceps to increase a long-term internal ATP energy; a predetermined amount of L-theanine to increase a mental energy; and a predetermined amount of external energy stimulants including caffeine to provide a short-live external energy, which may be utilized as beverages, foods, supplements, and drugs so as to provide the absolute energy for all mammals including human beings, and pets such as dogs, cats, and rodents.

Abstract: Two or more plates, each having a matching alignment hole, are precisely aligned and mated together by an aligning and clamping device that includes: (a) a plurality of movable aligning fingers, retraction means for causing the aligning fingers to move into a retracted state where they occupy a first volumetric space sufficiently small to allow the two or more plates to be moved over the retracted fingers so as to have their respective alignment holes surrounding the retracted aligning fingers; (b) expansion means for use after the plates have been moved over the fingers, the expansion means urging the fingers to expand outwardly to occupy a second volumetric space greater than the first volumetric space such that the fingers begin to contact and begin to improve co-alignment between the surrounding alignment holes; and (d) clamping means for use after the alignment holes of the plates have begun to come into improved co-alignment, the clamping means applying a clamping force for clamping the two or more mate

Abstract: Two or more plates, each having a matching alignment hole, are precisely aligned and mated together by an aligning and clamping device that includes: (a) a plurality of movable aligning fingers, retraction means for causing the aligning fingers to move into a retracted state where they occupy a first volumetric space sufficiently small to allow the two or more plates to be moved over the retracted fingers so as to have their respective alignment holes surrounding the retracted aligning fingers; (b) expansion means for use after the plates have been moved over the fingers, the expansion means urging the fingers to expand outwardly to occupy a second volumetric space greater than the first volumetric space such that the fingers begin to contact and begin to improve co-alignment between the surrounding alignment holes; and (d) clamping means for use after the alignment holes of the plates have begun to come into improved co-alignment, the clamping means applying a clamping force for clamping the two or more mate