Space environmental work simulator Patent

Space environmental work simulator with portions of space suit mounted to vacuum chamber wal

Gun facilitates adhesive bonding of studs to surfaces

Gun facilitates adhesive bonding of thermoplastic-backed studs to smooth, hard surfaces. Such studs can be used for mounting loads where defacement with drilled holes cannot be tolerated. These studs can be easily removed by softening the plastic bonding with heat from the gun

Cherenkov-dE/dx-range measurements on cosmic ray iron group nuclei

A balloon experiment which combined a large area plastic detector unit with electronic dE/dx-C data is presented. The correlation of the electronic data with the range data of the plastic detector stack was achieved by rotating plastic detector disks which provided in this way the passive plastic detector with an incorporated time determination. The constant flux of cosmic ray particles with charge Z greater than two was used to gauge the time resolving system. Stopping cosmic ray iron group nuclei in the energy range 400 to 700 MeV/nuc are identified using their electronic scintillator and Cherenkov signals and their etch conelengths and range data. The precise knowledge of the particle's trajectory proposes refined pathlength corrections to the electronic data

Cork-resin ablative insulation for complex surfaces and method for applying the same

A method of applying cork-resin ablative insulation material to complex curved surfaces is disclosed. The material is prepared by mixing finely divided cork with a B-stage curable thermosetting resin, forming the resulting mixture into a block, B-stage curing the resin-containing block, and slicing the block into sheets. The B-stage cured sheet is shaped to conform to the surface being insulated, and further curing is then performed. Curing of the resins only to B-stage before shaping enables application of sheet material to complex curved surfaces and avoids limitations and disadvantages presented in handling of fully cured sheet material

The Dick test in relation to scarlet fever

(1) A toxic filtrate obtained from the haemolytic streptococcus associated with an acute case of scarlet fever was used intradermally in a dilution of l' in 1000 and in 0.2 cc. amounts as the skin test dose for the purpose of the Dick test. The reaction depended on the quantity of toxin injected and on the particular toxin, deemed specific, employed. The standardisation of a selected toxin is a difficult matter and can only be estimated after a large number of tests have been made in relation to susceptibility and non-susceptibility to scarlet fever. (2) The toxin adopted and used in testing 1879 persons not suffering from scarlet fever indicated a susceptibility rate just ahead in time of the known age-incidence of the disease. It yielded a high percentage positive rate in the early years of life, the highest incidence, 85 per cent, falling on the 4 to 5 age period. This shows that if the production of active immunity to scarlet fever is adopted as a general preventive measure, in the same way as has been in the case of diphtheria, it, should be carried out in the under-school-age period. The average susceptibility rate for all age periods was 47.8 per cent. (3) The Dick test determined susceptibility or immunity to scarlet fever. Twenty-seven persons who previously gave positive reactions to the test and were presumably susceptible to scarlet fever contracted the disease whilst not one of fifty-eight persons who were negative to the test took scarlet fever on direct exposure. (4) In the large majority, 85.4 per cent, of 269 individuals suffering from scarlet fever the Dick test was positive in the first four days of the disease and became negative as convalescence advanced. Only 8.4 per cent gave positive reactions from the beginning of the third to the end of the fifth week. It is frankly admitted that negative reactions have occurred in acute cases and positive reactions in late convalescent cases, and while certain suggestions may be made to account for these, an adequate explanation of; such apparent anomalies is not yet forthcoming. (5) On the whole the results obtained with the Dick test bore a definite relationship to immunity to scarlet fever. They agreed with those obtained by various investigators and were in support of the claim that the Dick test is a valid/ 8 0 . valid one and pari passu that the haemclytic "Streptococcus scarlatinas" is most probably the etiological agent of scarlet fever. (6) The Dick test affords valuable corroborative evidence on which to base a diagnosis of scarlet fever and may even be regarded as the deciding factor in those cases where the clinical evidence is of a doubtful or conflicting nature. The test was also turned to account in the administrative supervision of the clinical side of the hospital. The practical applications which the test may furnish as a diagnostic weapon and at the same time as a useful measure in hospital administration may be summarised as follows: (a) A negative Dick test in the first four days of a disease, or a strongly positive Dick test after the fourth day, and more especially after the fourteenth day of a disease, were testimony that the disease was not scarlet fever unless clinical evidence was to the contrary. (b) A negative reading of the test, however, in the first four days of a disease simulating scarlet fever meant that the diagnosis of scarlatina would have to be withheld until verified later by clinical signs alone. (c) The possibility of an early interpretation of the reaction was of great clinical value. This was specially useful in providing a ready means of preventing exposure of positive Dick reactors to scarlet fever by too hasty an admission to scarlet fever wards. Once exposed to scarlet fever positive reactors could be isolated or could receive prophylactic doses of scarlet fever antitoxin within a day of the application of the test. (d) Negative Dick reactors could be placed or allowed to remain in scarlet fever pavilions without much fear of their taking scarlatina. (e) Oases in whom the diagnosis was in doubt and who by reason of single or repeated Dick tests were considered non-scarlatinal need not be kept in hospital for the usual four to five weeks’ supervision. Dick negative reactors who came into actual contact with scarlet fever could be sent home with equanimity. (f) The test enables one to discriminate in the selection of a nursing staff for scarlet fever pavilions and to ensure that only nonsusoeptibles shall be so employed. Susceptible nurses could be prepared for scarlet fever duty by a process of active immunisation which is now available and which is actually in routine use in some fever hospitals

Aerial applications dispersal systems control requirements study

Performance deficiencies in aerial liquid and dry dispersal systems are identified. Five control system concepts are explored: (1) end of field on/off control; (2) manual control of particle size and application rate from the aircraft; (3) manual control of deposit rate on the field; (4) automatic alarm and shut-off control; and (5) fully automatic control. Operational aspects of the concepts and specifications for improved control configurations are discussed in detail. A research plan to provide the technology needed to develop the proposed improvements is presented along with a flight program to verify the benefits achieved

Sprayable low density ablator and application process

A sprayable, low density ablative composition is described consisting esentially of: (1) 100 parts by weight of a mixture of 25-65% by weight of phenolic microballoons, 0-20% by weight of glass microballoons, 4-10% by weight of glass fibers, 25-45% by weight of an epoxy-modified polyurethane resin, 2-4% by weight of a bentonite dispersing aid, and 1-2% by weight of an alcohol activator for the bentonite; (2) 1-10 parts by weight of an aromatic amine curing agent; and (3) 200-400 parts by weight of a solvent

Permanent Draft Genome Sequences for Two Variants of Frankia sp. Strain CpI1, the First Frankia Strain Isolated from Root Nodules of Comptonia peregrina

Frankia stains CpI1-S and CpI1-P are members of Frankia lineage Ia that are able to reinfect plants of the Betulaceae and Myricaceae families. Here, we report two 7.6-Mbp draft genome sequences with 6,396 and 6,373 candidate protein-coding genes for CpI1-S and CpI1-P, respectively