Sheridan Technical College

Ecthyma gangrenosum is a rare dermatological manifestation often linked to Pseudomonas aeruginosa bacteremia, typically occurring in immunocompromised individuals. We present a case of ecthyma gangrenosum in a 69-year-old male with diabetes mellitus, but without HIV, malignancy, or chronic immunosuppressive therapy. The patient exhibited septic shock, pyelonephritis, and pneumonia, and was eventually diagnosed with ecthyma gangrenosum due to systemic Pseudomonas aeruginosa infection. This case highlights the occurrence of ecthyma gangrenosum in an older patient with metabolic comorbidities and age-related immune dysfunction, but without classic immunosuppressive conditions. It underscores the importance of early recognition and intervention in such populations, and the need for a nuanced approach to immune status in elderly patients with diabetes.

A method is presented for formulating and solving the Newton-Euler equations of motion of a system of interconnected rigid bodies. The digital simulation may involve numerical integration of the kinematic equations as well as the dynamic equations. The reaction forces and torques resulting from rigid constraints imposed at the connecting joints are also determined. The derivation of kinematic expressions for first and higher derivatives is demonstrated based on direct differentiation of the rotation matrix in the spirit of the classical vector approach. A representative problem in spatial mechanism analysis is solved and illustrated with numerical results.

This monitor presents visually the information recorded on magnetic tape without employing auxiliary equipment such as movable scanning heads, amplifiers, etc. The presentation is a variable-area display that indicates frequency and amplitude. The display remains stationary as long as the tape is motionless in the Magnescope, but movement of the tape is accompanied by corresponding movement of the display. Magnescope consists of a unique cathode-ray tube and its associated power supply. The cathode-ray tube is so constructed that the magnetic fields from the tape directly influence a beam of electrons which produces the variable-area display.

Experience to date indicates that magnetic recording can improve quality, simplify operation and reduce cost in motion picture making. Further, the extent to which these objectives are accomplished is largely dependent upon the willingness to change technique and equipment.

The projection of a motion picture on a translucent screen for background purposes has become increasingly important in studio operations during the past ten years. Many shots now made through the use of this process would have been extremely costly and perhaps impossible if attempted by direct filming of the complete action. — The sharp rise in production costs during the past few years, coupled with the curtailment of foreign markets, demanded that every effort be expended to simplify production methods. — With this in view, Paramount Pictures embarked upon a complete modernization program of the Transparency department production equipment early in 1940. New compact projection units, bases for the projectors, rewind tables, screen frames, screen handling equipment, and light-bridges were designed and built. This equipment has immeasurably simplified operations as well as improved quality beyond levels heretofore achieved. — Descriptions of this equipment are presented, with emphasis upon a comparison of the new with the old. The success of the equipment can be attributed largely to standardization of component parts. Complete interchangeability of essential units, coupled with easy access to critical points, has gone far toward eliminating lost time and motion in meeting unexpected emergencies.

The principle of a null-indicating densitometer has been adapted to the measurement of camera lens iris settings. — An optical system calibrated in accordance with the described technic is rendered amenable to precise calculation of the luminous flux per unit area in any part of the field, with particular stress laid on the axial condition.

Fine-grain film materials have supplanted the normal positive type emulsions for all variable-density sound-recording and printing operations. The sound-quality improvement realized by the reduction in noise and distortion is now available for all sound operations, including release prints. The paper describes a number of problems encountered and solved in the commercial application of such films for sound recording, including factors affecting the choice of negative and print materials, noise, distortion, sensitometric characteristics, recorder lamp supplies, and noise problems on stages.

A mobile two-way horn system has been constructed to provide improved quality playbacks to sound-recording stages, the same horn equipment also being useful in connection with high-level announcing systems. The material in this paper covers certain of the mechanical and electrical design features of this horn system, together with brief descriptions of other new portions of the playback system, including an equalized feedback type disk playback amplifier, a playback control system for the production mixer, and a compact and easily handled high-quality speaker for use in connection with the direct recording of low-level playbacks.