Available Technologies

ADDITIONAL FILTERS

Computer Science & Communications

33 available technologies

Motion Generator to Transform Linear into Nutation Motion

A nutation motion generator which transforms linear motion into nutation motion. The device employs a spherical, four-bar linkage mechanism. Three four-bar linkage mechanisms are sandwiched between a stationary support surface and a drive plate and arranged at 120-degree intervals about the support surface. Each four-bar linkage mechanism is constructed of four planar sections which are hinged along their edges, the four hinged planar sections being essentially triangular in shape so that they would join at a point in the center of the device if they extended to the apex of their respective triangles. A universal joint is located at the center of the device to provide stability. The four-bar linkage mechanism can be collapsed to a substantially flatten configuration, opened and then collapsed to a substantially flattened configuration at an angle 90-degree. to that of the first flattened configuration. Since each four-bar linkage mechanism has this capacity, the drive plate can be positioned at any angle relative to the support surface. The movement of the four-bar linkage mechanisms is generated by an actuator consisting of three reciprocal-motion drivers connected between the hinged edges of adjacent four-bar linkage mechanisms which are driven by a controlled electric pulse. The reciprocal-motion drivers, for micro applications, are piezoceramic stacks. If the drive plate is circular and its outer perimeter is fitted with beveled gear teeth, a second gear (the "driven" gear), with a smaller diameter than the drive gear, can be meshed with the drive gear to drive the driven gear at a reduced speed and at a relatively high torque. The three-dimensional motion of the mechanism makes the device very compact, and amplification is improved as the device is made flatter. In addition, the interaction between the nutating element and the top of the support surface creates a very large gear reduction.

System for Stabilizing Phase of a Picosecond Laser Sysem to an RF Accelerator

The invention relates to an improved method and system for synchronizing signals in a particle accelerator system. In one embodiment, a method and system is disclosed whereby a phase of laser pulses are monitored, and a high-frequency signal is adjusted as necessary to be substantially in-phase with the laser pulses. In another embodiment, a method and system is disclosed whereby a phase of an electromagnetic field in an electron gun is monitored, and a high-frequency signal is adjusted as necessary to be substantially in-phase with the electromagnetic field.

KnowledgeMap

In the past, looking up information on a medical concept could take a student hours of searching through old class notes and textbooks and scouring through medical websites. Vanderbilt's new web-based database, KnowledgeMap, is making the process much easier. The database includes documents created by medical school teachers for their classes (e.g. handouts, PowerPoint slides and web links) in a searchable format. Users are able to type in a concept and quickly discover where it is covered throughout the medical school curriculum, and subsequently view those documents in which the concept is discussed.

System for Standardizing Ultrasonography Training Using Tomographic Volumes

Currently practical (as opposed to didactic) training is performed by trainees practicing on live patients and then learning disease processes from mentors. The training is serendipitous by necessity. This technology would potentially shorten, standardize, and broaden the training for technicians as well as radiologists and surgeons.

Gene Expression Model Selector (GEMS)

Gene Expression Model Selector (GEMS) is a system that constructs, in a supervised fashion, diagnostic and outcome prediction models from array gene expression data. Examples of such models are: (a) models that detect cancer, (b) models that determine the correct subtype of cancer or (c) models that predict survival after treatment. Models that support such complex decision making are widely recognized as having the potential to revolutionize medicine in the years to come. In addition to the decision support models, GEMS can be used to select a small number of genes that are as good or better than the full gene set for diagnosis and/or outcome prediction. These biomarkers (genes) are also useful for discovery purposes (e.g., they suggest plausible causes and treatments of various types of cancer). Finally, GEMS provides estimates of the models' performance (e.g., accuracy) in future applications (i.e., when applied on patients not used to build the models but who come from the same patient population as the ones used to build the models), and allows users to run the models for individual patients.

Algorithms for Variable Selection and Causal Discovery

A method of determining a local causal neighborhood of a target variable from a data set can include identifying variables of the data set as candidates of the local causal neighborhood using statistical characteristics, and including the identified variables within a candidate set. False positive variables can be removed from the candidate set according to further statistical characteristics applied to each variable of the candidate set. The remaining variables of the candidate set can be identified as the local causal neighborhood of the target variable.

Research Electronic Data Capture (REDCap) Toolset

REDCap (Research Electronic Data Capture) is a secure web application for building and managing online surveys and databases. Despite its broad potential application, the primary function is for Electronic Data Capture, specifi cally for Clinical Trial Management solutions. REDCap is a globally implemented platform at over 450 institutional partners from CTSA, GCRC, RCMI and other institutions in 49 countries. The REDCap application allows users to build and manage online surveys and databases quickly and securely, and is currently in production use or development build-status for more than 44,000 projects with over 59,000 users spanning numerous research focus areas across the consortium.

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