Impingement effect of service module reaction control system engine plumes. Results of service module reaction control system plume model force field application to an inflight Skylab mission proximity operation situation with the inflight Skylab response

Plume impingement effects of the service module reaction control system thruster firings were studied to determine if previous flight experience would support the current plume impingement model for the orbiter reaction control system engines. The orbiter reaction control system is used for rotational and translational maneuvers such as those required during rendezvous, braking, docking, and station keeping. Therefore, an understanding of the characteristics and effects of the plume force fields generated by the reaction control system thruster firings were examined to develop the procedures for orbiter/payload proximity operations

Automatic, computerized testing of bolts

System for testing bolts with various platings, lubricants, nuts, and tightening procedures tests 200 fasteners, and processes and summarizes the results, within one month. System measures input torque, nut rotation, bolt clamping force, bolt shank twist, and bolt elongation, data is printed in report form. Test apparatus is described

Lagrangian multiform structure for the lattice Gel'fand-Dikii hierarchy

The lattice Gel'fand-Dikii hierarchy was introduced by Nijhoff, Papageorgiou, Capel and Quispel in 1992 as the family of partial difference equations generalizing to higher rank the lattice Korteweg-de Vries systems, and includes in particular the lattice Boussinesq system. We present a Lagrangian for the generic member of the lattice Gel'fand-Dikii hierarchy, and show that it can be considered as a Lagrangian 2-form when embedded in a higher dimensional lattice, obeying a closure relation. Thus the multiform structure proposed in arXiv:0903.4086v2 [nlin.SI] is extended to a multi-component system.Comment: 12 page

Humoral and Secretory Immunoglobulins of the Sheepshead, Archosargus probatocephalus, A Marine Teleost

The sheepshead has two readily isolatable humoral immunoglobulins, a 16S tetrameric form and a 6S monomeric form. The 16S tetrameric form is composed of two subpopulations, one being a disulfide linked form (~700,000 daltons) and the other a noncovalently linked population of predominantly disulfide linked dimers (~350,000 daltons). The 6s immunoglobulin (~140,000 daltons) is composed of two noncovalently linked units (~70,000 daltons) each having one heavy and one light chain. The 6S immunoglobulin is antigenically deficient to the 16S immunoglobulin, this deficiency may be due to the heavy chain of the 6s protein lacking a~25,000 dalton segment present in the heavy chain of the 16S molecule. Cutaneous mucus and bile also contain immunoglobulins. The mucus contains three proteins that can be considered immunoglobulins: a 6S form which is antigenically indistinguishable from the serum 6S immunoglobulin: a ~700,000 dalton form which does not have a dimeric subpopulation as observed with the serum 16S protein; and a dimeric form of ~350,000 daltons. The dimeric form may have a secretory piece since the reduced mucus dimeric protein shows an additional polypeptide chain at ~95,000 daltons. All of the cutaneous mucus high molecular weight immunoglobulins have heavy and light chains identical to the serum high molecular weight immunoglobulins (~70,000 and ~25,000 daltons). Bile immunoglobulin is dimeric and composed of two noncovalently linked monomers of ~l60,000 daltons. The bile heavy chains are ~55,000 daltons; the light chains are ~25,000 daltons. The bile immunoglobulin does not appear to be a different class of protein from that of the serum or mucus immunoglobulins. In vivo administration of radiolabeled 16S and 6S serum immunoglobulins indicates that the 6S protein is not a degradation product of the 16S form. The half lives of the 16S and 6s forms are both ~16 days. Furthermore, the secretory immunoglobulins of the bile and mucus are not due to simple transudation or active transport of the predominant serum immunoglobulins. This result suggests that the secretory immunoglobulins of the sheepshead may be locally synthesized

The UK Consumer's Attitudes to, and Willingness to Pay for, imported Foods

We report results from an investigation into consumer preferences for locally produced foods. Using a choice experiment we estimate willingness to pay for foods of a designated origin together with certification for Organic and GM free status. Our results indicate that there is a preference for locally produced food which is GM free, Organic and produced in the traditional season.imported food, seasonality, willingness-to-pay, choice experiment, Demand and Price Analysis, Food Consumption/Nutrition/Food Safety, International Relations/Trade,

Apollo experience report: Flight anomaly resolution

The identification of flight anomalies, the determination of their causes, and the approaches taken for corrective action are described. Interrelationships of the broad range of disciplines involved with the complex systems and the team concept employed to ensure timely and accurate resolution of anomalies are discussed. The documentation techniques and the techniques for management of anomaly resolution are included. Examples of specific anomalies are presented in the original form of their progressive documentation. Flight anomaly resolution functioned as a part of the real-time mission support and postflight testing, and results were included in the postflight documentation