3,382 research outputs found
MCC level C formulation requirements. Shuttle TAEM targeting
The level C requirements for the shuttle orbiter terminal area energy management (TAEM) guidance and flight control functions to be incorporated into the Mission Control Center entry profile planning processor are described. This processor is used for preentry evaluation of the entry through landing maneuvers, and includes a simplified three degree-of-freedom model of the body rotational dynamics that is necessary to account for the effects of attitude response on the trajectory dynamics. This simulation terminates at TAEM-autoland interface
Cloning crops in a CELSS via tissue culture: Prospects and problems
Micropropagation is currently used to clone fruits, nuts, and vegetables and involves controlling the outgrowth in vitro of basal, axillary, or adventitious buds. Following clonal multiplication, shoots are divided and rooted. This process has greatly reduced space and energy requirements in greenhouses and field nurseries and has increased multiplication rates by greater than 20 fold for some vegetatively propagated crops and breeding lines. Cereal and legume crops can also be cloned by tissue culture through somatic embryogenesis. Somatic embryos can be used to produce 'synthetic seed', which can tolerate desiccation and germinate upon rehydration. Synthetic seed of hybrid wheat, rice, soybean and other crops could be produced in a controlled ecological life support system. Thus, yield advantages of hybreds over inbreds (10 to 20 percent) could be exploited without having to provide additional facilities and energy for parental-line and hybrid seed nurseries
MCC level C formulation requirements. Shuttle TAEM guidance and flight control, STS-1 baseline
The TAEM guidance and body rotational dynamics models required for the MCC simulation of the TAEM mission phase are defined. This simulation begins at the end of the entry phase and terminates at TAEM autoland interface. The logic presented is the required configuration for the first shuttle orbital flight (STS-1). The TAEM guidance is simulated in detail. The rotational dynamics simulation is a simplified model that assumes that the commanded rotational rates can be achieved in the integration interval. Thus, the rotational dynamics simulation is essentially a simulation of the autopilot commanded rates and integration of these rates to determine orbiter attitude. The rotational dynamics simulation also includes a simulation of the speedbrake deflection. The body flap and elevon deflections are computed in the orbiter aerodynamic simulation
Letter from Carman G. Blough, Director of Research, to Members of the AIA, Re: Committee on Accounting Procedure Statement on Replacement Values and Charges to Income For Excessive Construction and Replacement Costs
Replacement Costs and Depreciation Policy
https://egrove.olemiss.edu/aicpa_guides/1786/thumbnail.jp
Role of Accounting in the Taxing Process, An Address before the National Tax Association, June 6, 1946
https://egrove.olemiss.edu/aicpa_guides/2317/thumbnail.jp
Recent Accounting Developments in the United States
https://egrove.olemiss.edu/aicpa_guides/2318/thumbnail.jp
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