An ultrasonic flowmeter for measuring dynamic liquid flow

A novel oscillating pipe system was developed to provide dynamic calibration wherein small sinusoidal signals with amplitudes of 0.5 to 10% of the steady-state flow were added to the steady-state flow by oscillating the flowmeter relative to the fixed pipes in the flow system. Excellent agreement was obtained between the dynamic velocities derived from an accelerometer mounted on the oscillating pipe system and those sensed by the flowmeter at frequencies of 7, 19, and 30 Hz. Also described were the signal processing techniques used to retrieve the small sinusoidal signals which were obscured by the fluid turbulence

A computer-controlled instrumentation system for third octave analysis

An instrumentation system is described which employs a minicomputer, a one-third octave band analyzer, and a time code/tape search unit for the automatic control and analysis of third-octave data. With this system the information necessary for data adjustment is formatted in such a way as to eliminate much operator interface, thereby substantially reducing the probability for error. A description of a program for the calculation of effective perceived noise level from aircraft noise data is included as an example of how this system can be used

Evaluation of an electro-optic remote displacement measuring system

An instrumentation system to provide a noncontact method for measurement of target positions was evaluated. The system employs two electro-optic camera units which give stereo information for use in determining three dimensional target locations. Specially developed, infrared sensitive photodetectors are used in the cameras to sense radiation from light emitting diode targets. Up to 30 of these targets can be monitored with a sampling rate of 312 Hz per target. An important part of the system is a minicomputer which is used to collect the camera data, sort it, make corrections for distortions in the electro-optic system, and perform the necesssary coordinate transformations. If target motions are restricted to locations in a plane which is perpendicular to a camera's optical axis, the system can be used with just one camera. Calibrations performed in this mode characterize accuracies in single camera operation. This information is also useful in determination of single camera contributions to total system errors. For this reason the system was tested in both the single camera and two camera (stereo) modes of operation

IPLIB (Image processing library) user's manual

IPLIB is a collection of HP FORTRAN 77 subroutines and functions that facilitate the use of a COMTAL image processing system driven by an HP-1000 computer. It is intended for programmers who want to use the HP 1000 to drive the COMTAL Vision One/20 system. It is assumed that the programmer knows HP 1000 FORTRAN 77 or at least one FORTRAN dialect. It is also assumed that the programmer has some familiarity with the COMTAL Vision One/20 system

The Traveler

In lieu of an abstract, below is the essay\u27s first paragraph. The traveler moved through the town with one thing on his mind, reaching his destinations. The journey had been long and difficult, and was beginning to take a visible toll on him. Once snug, brown, cotton pants hung far below his waist, held up by suspenders. A stained undershirt draped over his top emphasized the boniness of his shoulders and chest. Dirty blonde hair, knotty and broken at the ends, was pulled into a messy ponytail. His eyes were seas of blue, shadowed by deep, dark bags. An uneven beard covered most of his face, suggesting that he hadn\u27t shaved in months. A frizzy mustache acted as camouflage for the mouth that refused to smile before the end of the journey

The Purification and Characterization of the Drosophila melanogaster Trithorax Protein and its Implications in the Studies of the SET domain Family of Proteins

Methylation at histone H3 lysine 4 (H3K4) is a post-translational modification often associated with transcriptional regulation through altering the structural state of chromatin. The human mixed lineage leukemia protein-1 protein (MLL1) is a known histone methyltransferase that catalyzes the transfer of methyl groups to H3K4. MLL1 works in a core complex with other essential components, proteins WDR5, RbBP5, Ash2L, DPY-30 (WRAD), which is required for H3K4 dimethylation. Trithorax (TRX) protein is the Drosophila melanogaster ortholog to human MLL1, and although structurally similar is unable to perform dimethylation when in complex with the human components. The goal of this study is to understand the structural basis for this difference. We systematically mutated 20 amino acids in TRX the equivalent amino acid in human MLL1 and tested for a gain-of-function H3K4 dimethylation activity. We found 20 amino acid positions in TRX that were highly conserved among intertebrates but were different in vertebrates. Out of the 20 amino acids mutated, 5 showed a gain of dimethylation activity. All of the mutations that showed a gain of dimethylation activity localized to a common SET domain surface. The identified mutations on the common surface identify a location of the dimethyltransferase active site on MLL1

The development of radiation resistant insulating layers for planar silicon technology, 29 May 1968 - 28 June 1969

Ion implantation method for improving radiation resistance of thermal oxides on silico