A test comparing dry ice and mechanical refrigeration in the transportation of frozen citrus concentrate by motortruck (an interim report)

Mode of access: Internet.

Report on the mechanical equipment of New York harbor /

At head of title: No. 22. Department of docks and ferries ...

An elementary outline of mechanical processes, giving a brief account of the materials used in engineering construction and of the essential features in the methods of producing them, also describing shop processes and equipment for the shaping of metals into forms for engineering and general uses;

Mode of access: Internet.

Operator's manual including basic issue items list : test set, generator, and voltage regulator, automotive (Allen Electric and Equipment Co. model 30-82) (4910-270-3780).

"April 1965."

Operator, organizational, direct support, and general support maintenance manual (including repair parts and special tools list and depot maintenance repair parts and special tools) : test set, generator and voltage regulator, automotive, 12-and 24-volt systems (Allen Electric and Equipment Company model no. 30-92) (4910-092-9136).

"15 October 1971."

Operator, organizational, DS and GS maintenance manual for test set, guided missile system, AN/TSM-84 and electrical equipment shelter, S-250/G (modified) : (Lance guided missile system).

Includes index.

Organizational, direct support, and general support maintenance repair parts and special tools list for test stand, automotive generator, alternator, starter, and associated equipment, model GASR-500 : part number 7458-2, 7458-4, NSN 4910-01-041-8161, 4910-00-767-0218.

"May 1987."

Direct support and general support maintenance manual : test stand, automotive generator, alternator, starter, and associated equipment, model GASR-500 : part number 7458-2 ....

"June 1981."

Direct support and general support maintenance manual : receiver radio frequency noise measurement equipment including test set, radio frequency noise TS-3376/G (NSN 6625-00-237-2406), monitor, noise temperature ID-1915/G (NSN 5895-00-241-9367) for satellite communication terminal AN/FSC-78(V).

"June 1978."

General support maintenance repair parts and special tools list for test station, electronic equipment AN/USM-410(V)2 (NSN 6625-01-069-4223).

"18 October 1985."

Organizational and direct support maintenance manual for electronic equipment test facility TADS/PNVS augmentation equipment, 13082808-39, 13231600, 13231650, and 13231800.

"1 February 1986."

Safety code for mechanical power-transmission apparatus : rules for guarding prime movers, intermediate equipment, and driven machines : approved by American Standards Association as an American standard, 1927 /

"ASA B15-1927"--Cover.

Automobile friction materials: a test instrument and technique for determining dynamic mechanical properties in relation to brake squeal

This study is primarily concerned with the problem of break-squeal in disc brakes, using moulded organic disc pads. Moulded organic friction materials are complex composites and due to this complexity it was thought that they are unlikely to be of uniform composition. Variation in composition would under certain conditions of the braking system, cause slight changes in its vibrational characteristics thus causing resonance in the high audio-frequency range. Dynamic mechanical propertes appear the most likely parameters to be related to a given composition's tendency to promote squeal. Since it was necessary to test under service conditions a review was made of all the available commercial test instruments but as none were suitable it was necessary to design and develop a new instrument. The final instrument design, based on longitudinal resonance, enabled modulus and damping to be determined over a wide range of temperatures and frequencies. This apparatus has commercial value since it is not restricted to friction material testing. Both used and unused pads were tested and although the cause of brake squeal was not definitely established, the results enabled formulation of a tentative theory of the possible conditions for brake squeal. The presence of a temperature of minimum damping was indicated which may be of use to braking design engineers. Some auxilIary testing was also performed to establish the effect of water, oil and brake fluid and also to determine the effect of the various components of friction materials.

Toward A Reliable Quality Control Test For Microneedle Insertion

Microneedles (MNs) are emerging devices that can be used for the delivery of drugs at specific locations1. Their performance is primarily judged by different features and the penetration through tissue is one of the most important aspects to evaluate. For detailed studies of MN performance different kind of in-vitro, exvivo and in-vivo tests should be performed. The main limitation of some of these tests is that biological tissue is too heterogeneous, unstable and difficult to obtain. In addition the use of biological materials sometimes present legal issues. There are many studies dealing with artificial membranes for drug diffusion2, but studies of artificial membranes for Microneedle mechanical characterization are scarce3. In order to overcome these limitations we have developed tests using synthetic polymeric membranes instead of biological tissue. The selected artificial membrane is homogeneous, stable, and readily available. This material is mainly composed of a roughly equal blend of a hydrocarbon wax and a polyolefin and it is commercially available under the brand name Parafilm®. The insertion of different kind of MN arrays prepared from crosslinked polymers were performed using this membrane and correlated with the insertion of the MN arrays in ex-vivo neonatal porcine skin. The insertion depth of the MNs was evaluated using Optical coherence tomography (OCT). The implementation of MN transdermal patches in the market can be improved by make this product user-friendly and easy to use. Therefore, manual insertion is preferred to other kind of procedures. Consequently, the insertion studies were performed in neonatal porcine skin and the artificial membrane using a manual insertion force applied by human volunteers. The insertion studies using manual forces correlated very well with the same studies performed with a Texture Analyzer equipment. These synthetic membranes seem to mimic closely the mechanical properties of the skin for the insertion of MNs using different methods of insertion. In conclusion, this artificial membrane substrate offers a valid alternative to biological tissue for the testing of MN insertion and can be a good candidate for developing a reliable quality control MN insertion test.

Comparison of ultrafine particle release from hardcopy devices in emission test chambers and office rooms

The release of ultrafine particles (UFP) from laser printers and office equipment was analyzed using a particle counter (FMPS; Fast Mobility Particle Sizer) with a high time resolution, as well as the appropriate mathematical models. Measurements were carried out in a 1 m³ chamber, a 24 m³ chamber and an office. The time-dependent emission rates were calculated for these environments using a deconvolution model, after which the total amount of emitted particles was calculated. The total amounts of released particles were found to be independent of the environmental parameters and therefore, in principle, they were appropriate for the comparison of different printers. On the basis of the time-dependent emission rates, “initial burst” emitters and constant emitters could also be distinguished. In the case of an “initial burst” emitter, the comparison to other devices is generally affected by strong variations between individual measurements. When conducting exposure assessments for UFP in an office, the spatial distribution of the particles also had to be considered. In this work, the spatial distribution was predicted on a case by case basis, using CFD simulation.