Developing assisted living facilities : the impact of state licensing

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.Includes bibliographical references (leaves 66-69).Robert C. Jenkens.M.S

OSIRIS-REx Contamination Control Strategy and Implementation

OSIRIS-REx will return pristine samples of carbonaceous asteroid Bennu. This manuscript describes how pristine was defined based on expectations of Bennu and on a realistic understanding of what is achievable with a constrained schedule and budget, and how that definition flowed to requirements and implementation. To return a pristine sample, the OSIRIS-REx spacecraft sampling hardware was maintained at Level 100 A/2 and less than 180 nanograms per square centimeter of amino acids and hydrazine on the sampler head through precision cleaning, control of materials, and vigilance. Contamination is further characterized via witness material exposed to the spacecraft assembly and testing environment as well as in space. This characterization provided knowledge of the expected background and will be used in conjunction with archived spacecraft components for comparison with the samples when they are delivered to Earth for analysis. Most of all, the cleanliness of the OSIRIS-REx spacecraft was achieved through communication between scientists, engineers, managers, and technicians

Effects of Heat Treatment on the Color Stability of Pawpaw Pulp

Polyphenol oxidase has been found to be involved in the brown discoloration of pawpaw pulp. Its activity is the greatest at pH 6.5–7.0 and at 5–20o C. Exposure to 40–80o C caused the crude extract of the enzyme to lose its enzyme activity rapidly. The objective of this study was to determine whether brief heat treatment could prevent discoloration of pawpaw pulp. Pawpaw fruits were harvested from the research farm of Kentucky State University in the fall of 2006. Freshly prepared pulp homogenate consisting of about 10 fruits was divided into 16 individual, equal-sized portions, placed in vacuum packed plastic bags. The bags were heated by being placed in boiling water for 0, 1, 3 or 5 minutes. Immediately after heating, they were cooled in ice cold water. The pulp was removed from each of the bags and placed evenly in a flat plastic container covered with plastic film. Air was allowed into the container through holes on the film. The color of the pulp in the containers was measured with a colorimeter at 0, 1, 2, 10 and 20 hours after the end of the heat treatment. With no heat treatment, the pulp changed color rapidly, turning completely brown by 10 hours. Heating for 1 or 3 minutes slowed down the color change but heating for 5 minutes essentially prevented significant color changes in the pulp. Our results indicate that a brief heat treatment can be used to prevent discoloration of pawpaw pulp

Store Counter.

Patent for a new and improved store counter. This design "consists in the construction and novel arrangement of the horizontal slideways in the lower portion of the counter extending from front to rear, the rectangular slide-frames working therein, and the angular boxes pivoted by their lower and middle portions to the slide-frames and reversible therein by a rocking movement" (lines 17-24)

On-Orbit Performance Verification and End-to-End Characterization of the TDRS-H Ka-Band Communications Payload

In June 2000, NASA launched the first of three next generation Tracking and Data Relay Satellites (TDRS-H) equipped with a Ka-band forward and return service capability. This Ka-band service supports forward data rates up to 25 Mb/sec using the 22.55 - 23.55 GHz space-to-space allocation. Return services are supported via channel bandwidths of 225 and 650 MHz for data rates up to 800 Mb/sec (QPSK) using the 25.25 - 27.5 GHz space-to-space allocation. As part of NASA's acceptance of the TDRS-H spacecraft, an extensive on-orbit calibration, verification and characterization effort was performed to ensure that on-orbit spacecraft performance is within specified limits. This process verified the compliance of the Ka-band communications payload with all performance specifications and demonstrated an end-to-end Ka-band service capability. This paper summarizes the results of the TDRS-H Ka-band communications payload on-orbit performance verification and end-to-end service characterization. Performance parameters addressed include Effective Isotropically Radiated Power (EIRP), antenna Gain-to-System Noise Temperature (G/T), antenna gain pattern, frequency tunability and accuracy, channel magnitude response, and Ka-band service Bit-Error-Rate (BER) performance