Contourograph display system for monitoring electrocardiograms

Electrocardiogram is displayed as a contourogram on the cathode ray tube of a variable-persistence oscilloscope. Each cycle is stacked below its predecessors giving a three dimensional effect. A major change in the signal is apparent as a change in the contourogram pattern

Automated analysis of blood pressure measurements (Korotkov sound)

Automatic system for noninvasive measurements of arterial blood pressure is described. System uses Korotkov sound processor logic ratios to identify Korotkov sounds. Schematic diagram of system is provided to show components and method of operation

Apparatus and method for processing Korotkov sounds

A Korotkov sound processor, used in a noninvasive automatic blood measuring system where the brachial artery is occluded by an inflatable cuff, is disclosed. The Korotkoff sound associated with the systolic event is determined when the ratio of the absolute value of a voltage signal, representing Korotkov sounds in the range of 18 to 26 Hz to a maximum absolute peak value of the unfiltered signals, first equals or exceeds a value of 0.45. Korotkov sound associated with the diastolic event is determined when a ratio of the voltage signal of the Korotkov sounds in the range of 40 to 60 Hz to the absolute peak value of such signals within a single measurement cycle first falls below a value of 0.17. The processor signals the occurrence of the systolic and diastolic events and these signals can be used to control a recorder to record pressure values for these events

Applying technology to work: toward a better understanding of telework

Technology is enabling employees to work away from the office as teleworkers, where they experience increased flexibility to manage their work and personal lives. The last several decades have seen telework rapidly expand as a work mode, which offers both new opportunities and challenges for employees and corporations alike. This paper covers a brief overview of telework research and practice, in the hopes of providing a better understanding of this rapidly emerging form of virtual work. The paper first describes its growing popularity and the types of telework being practiced, and then reviews some key findings in prior research by examining alterations in the work–family interface, job satisfaction, and organizational identification. Present-day factors spurring telework’s growth and factors holding it back are then discussed, including issues of technology acceptance, business continuity, and carbon footprint, as well as challenges such as isolation, co-worker resentment, and managerial reluctance. The paper then briefly explores some crucial issues facing telework in the future if it is to remain a successful work practice, including knowledge sharing, individual differences, and the way organizational policies and practices are enacted. Finally, some proscriptive recommendations for managers are offered in the hopes of helping practitioners harness the potential of this form of technology-enabled virtual work

Precision laser range finder system design for Advanced Technology Laboratory applications

Preliminary system design of a pulsed precision ruby laser rangefinder system is presented which has a potential range resolution of 0.4 cm when atmospheric effects are negligible. The system being proposed for flight testing on the advanced technology laboratory (ATL) consists of a modelocked ruby laser transmitter, course and vernier rangefinder receivers, optical beacon retroreflector tracking system, and a network of ATL tracking retroreflectors. Performance calculations indicate that spacecraft to ground ranging accuracies of 1 to 2 cm are possible

From Tropes to Troupes: Misty Copeland and the Hyper-Whiteness of Ballet

In June of 2015, Misty Copeland became the first black woman promoted to a Principal Dancer in the American Ballet Theatre: a prestigious emblem of the institution of ballet, which is historically almost exclusively white. This stands in stark contrast with American sporting institutions like basketball and track and field, in which black athletes have achieved prominence. The immediately logical explanation is the financial inaccessibility of ballet to black Americans who live disproportionately in poverty and prefer athletic outlets where specialized equipment and one-on-one training are not required. However, this paper will present a second explanation for the persistent inaccessibility of ballet to black bodies. Where white hegemony is historically content to exploit black bodies for athletic advantages, ballet is a form of art before it is a conventional sport, and its rigidly white idea of beauty is considered an art worth preserving rather than a competitive landscape worth widening

Today's Children, Tomorrow's America: Six Experts Face the Facts

Compiles essays about trends in family structure; how federal, state, and local budget deficits and projected cuts affect child poverty rates and health; and their long-term implications of reduced investment in children. Includes policy recommendations

A novel laser ranging system for measurement of ground-to-satellite distances

A technique was developed for improving the precision of laser ranging measurements of ground-to-satellite distances. The method employs a mode-locked laser transmitter and utilizes an image converter tube equipped with deflection plates in measuring the time of flight of the laser pulse to a distant retroreflector and back. Samples of the outgoing and returning light pulses are focussed on the photocathode of the image converter tube, whose deflection plates are driven by a high-voltage 120 MHz sine wave derived from a very stable oscillator. From the relative positions of the images produced at the output phosphor by the two light pulses, it is possible to make a precise determination of the fractional amount by which the time of flight exceeds some large integral multiple of the period of the deflection sinusoid