User:IveGoneAway/sandbox

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<sup>[[{{TALKPAGENAME}}#With Respect to What|[With Respect to What?] ]]</sup> {{-}} {{Citation needed|date=July 2009}} {{-}} {{compu-hardware-stub}} {{-}} {{disambig}}

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ARP4754A
Guidelines For Development Of Civil Aircraft and Systems
Latest Revision December 2010
Prepared by SAE International


Guidelines Covering Aircraft Development and Operation
Development
ARP4761
Safety Assessment in Development
ARP4754A
Aircraft & System Development
DO-297
IMA
DO-254
Hardware
DO-178C
Software
Operation
ARP5150/ARP5151
Safety Assessment in Service


The objective is to use an adaptation of Figure 1 of ARP4754A to visually link the integrated SAE and RTCA standards. There is probably a better way to do this; so someone with more template or svg skills is welcome to improve. The overall plan is to use the template to visually link the guidance documents that have been integrated under AC 1309 and ARP4754. For this reason I wanted to

  1. replicate the spirit of Figure 1 in an infoboxish style and
  2. integrate links to the included document articles (something of a Nav box?).

next[edit]

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DO-178C / ED-12C
Software Considerations in Airborne Systems and Equipment Certification
Latest revision 01/05/2012
Prepared by RTCA SC-205
EUROCAE WG-12
ARP4754A
Guidelines For Development Of Civil Aircraft and Systems
Latest Revision December 2010
Prepared by SAE International

TTP[edit]

This page is about the commercial product named Time Triggered Protocol or TTP; which embodies a form of time-triggered communication protocol, for other time-triggered communication protocols, see Time-Triggered Protocol (Disambiguation)

TTP is a registered trademark of TTTech

Time-Triggered Protocol (Disambiguation) Time-Triggered Communication Protocol

Time-Triggered Protocol, Time Triggered Protocol, or Time-Triggered Communication Protocol, refers to a class of communication protocols that employ cyclic, isochronous scheduling of bus access by multiple transmitters, generally in the form of TDMA.[1]

Time triggered protocols generally provision for a fixed and repeating schedule of isochronous transmissions (channel access) distributed among multiple transmitters. This main schedule or cycle may be divided into a fixed schedule of sub-cycles, each having a different but fixed schedule of transmissions. Portions of such cycles may be given over to other forms non-isochronous access controls; for example, a cyclic time window or slot may be given over for a fixed period of asynchronous bus access, such as CDMA arbitration as in the case of TTCAN.

SAE AS6803, TTP Communication Protocol

Examples of time-triggered communication protocols include:[2]

Distinctions from other classes of protocols[edit]

Time-triggered protocols rely on a distributed schedule; that is, each transmitter node must be able to synchronize with the network schedule and know when it is scheduled to have channel access within that schedule. As such, these protocols are distinct from Bus Controller/Bus Master systems wherein only a single node is responsible for controlling bus access (cf. Mil-Std-1553), even if that access may be a cyclical schedule in a given application.

Time triggered protocols are also distinct from single-transmitter, periodic messaging protocols; ARINC 429 being an example. In the ARINC 429 protocol, exactly one transmitter is connected to the bus, thus excluding multiple access techniques. Also, even though individual ARINC 429 messages may be transmitted on periodic schedules (within the maximum and minimum transmit intervals for each label), they are not necessarily collectively scheduled into a larger cyclic frame or major cycle. The specification of an ARINC 429 label message includes its periodic timing, but not its timing relative to other messages.[4]

Time triggered protocol’s isochronous schedules are also static (a priori) as opposed to dynamic, auto-negotiated (ad hoc) schedules as in the case of isochronous USB networks.

[1]

[2]

[4]

[5]

ISO 26262[edit]

Comparison of Hazard Effects Level
ASIL Severity Classifications DAL Failure condition Passenger threats Crew threats Airplane capability or safety margin
- - A Catastrophic Loss of the airplane and death of all aboard Fatality or incapacity Hull loss
D Life-threatening (survival uncertain) to fatal injuries
B Hazardous Serious or fatal injuries Impared abilty Large reduction
C Severe to life-threatening (survival probable) injuries
C Major Distress or minor injuries Distraction Significant reduction
B Light to moderate injuries
A
D Minor Physical discomfort Flight change or emergency procedures Slight reduction
QM No Injuries E No Effect Inconvenience No Effect No Effect



Modern[edit]

In particular, Russia and North America are the homes of great mechanized granaries, known separately and more conventionally as grain elevators.


Planet of the Apes[edit]

In a background subcontext, television and newspaper media report the lauch and subsequent loss of the Icarrus mission to Mars. Ceasar's parable with the sticks referes to the Roman and Italian symbology of the Facsise Rise makes several references to the Bright eyes was both the name of Ceasar's mother and Dr. 's ... name for Taylor The general layout of the ape cages in Rise reflect the layout in PotA Both Ceasar and Taylor are hosed down in punishment. Ceasar's first word is "No" in both Rise and PotA 's line "its a mad house! It's a mad house"


B9[edit]

B9 was originally defined by its neutritional effects, tha tis if there is not enough B9 factor tissue that depends on rapid cell devision fail. Such tissues include skin, hair, blood cells, intestinal linings and cancerous tumors) Vitamin B9 refers to a particular essential nutritional factor. Absence or suppression of the B9 factor results notably in slowing or failure of rapidly dividing cells (e.g., blood, skin, hair, intestines, or cancers), but also results in elevation of homocystine [6] and problems with nerve function.[7] Chemically, all B9 vitamers have the same parent structure, which is named pterolymonoglutamic acid (PMGA). Plants and bacteria are able to form this stucture de novo from pterin, p-aminobenzoate (PABA), and glutamate moieties [Biosynthesis of Folates] but vertebrates lack a complete folate synthesis pathway and so need a dietary supply.[8][9][10]

The terms Folic Acid and Folates are both used interchangably to refer to all natural and syntheric compounds that function as B9. However, there are situations where either term is used more narrorwly. Folic Acid can be used to refer generally to all compounds based on PMGA; but it can also refer specifically or implicitly to the manufactured "crystaline" form of PMGA, particularly as used in supplementation. Folate can also be used to refer generally to all compounds based on PMGA; but it is also used to refer specifically to PMGA-based compounds arrising through biological processes, especially the folate metabolism. The distinction between "crystaline" PMGA and bological folates is important because the to forms have different biochemical properties and effects.

FA prefered syn FA all PGMA FA food supplement F prefered syn F all natural

however, The prefered synonym for pterolymonoglutamic acid is folic acid, however there is some difficulty here because in some literature folic acid refers specifically or implicitly to the manufactured "crystaline" form of PMGA while other literaure applies the term equally to any metabolic compound, natural or synthetic, having pterolyglutamate as a parent structure.

  1. ^ a b Obermaisser, Roman (2005). Event-Triggered and Time-Triggered Control Paradigms. Springer Science+Business Media. pp. 21–23. ISBN 0-378-23043-2 Check |isbn= value (help). 
  2. ^ a b Obermaisser, Roman (2011). Time-Triggered Communication. CRC Press. ISBN 978-1-4398-4661-2. 
  3. ^ Knueppel,, Ralph (2012), "Standardization of CAN networks for airborne use through ARINC 825", CAN in Automation, CAN in Automation 
  4. ^ a b ARINC Specification 429, Part 1-17. Annapolis, Maryland: Aeronautical Radio, Inc. 2004-05-17. 
  5. ^ FlexRay Communications System Protocol Specification
  6. ^ "Folate: Evidence". Health Information - Drugs and Supplements. Mayo Clinic. 
  7. ^ Stahl, Stephan M., M.D. Ph.D (May 2008). "L-Methylfolate: A Vitamin for Your Monoamines". Journal For Clinical Psychiatry. 5 70: 767; author reply 767–9. PMID 19193337. 
  8. ^ Goyer, Aymeric; Victoria Illarionova, Sanja Roje, Markus Fischer, Adelbert Bacher and Andrew D. Hanson (2004). "Folate Biosynthesis in Higher Plants. cDNA Cloning, Heterologous Expression, and Characterization of Dihydroneopterin Aldolases". Plant Physiology. 135:103-111. PMID PMC429337 Check |pmid= value (help). 
  9. ^ Bauer, Stefanie; Ann-Kathrin Schott, Victoria Illarionova3, Adelbert Bacher, Robert Huber, Markus Fischer (June 2004). "Biosynthesis of Tetrahydrofolate in Plants: Crystal Structure of 7,8-Dihydroneopterin Aldolase from Arabidopsis thaliana Reveals a Novel Adolase Class". Journal of Molecular Biology 339 (4): 967–979. 
  10. ^ Fischer, Markus. "Biosynthesis of Folates". flavins.info.