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Topic: Performance envelope

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	Performance envelope - Wikipedia, the free encyclopedia
		In aerodynamics, the performance envelope of an aircraft refers to the capabilies of a design in terms of speed and altitude.
		Performance envelope is one of a number of related terms that are all use in a similar fashion.
		General aviation aircraft have very small performance envelopes, with speeds ranging from perhaps 50 to 200mph, whereas the extra power available to modern fighter aircraft result in huge performance envelopes with many times the area.
	www.wikipedia.org /wiki/Performance_envelope (911 words)

	DOE Building Technologies Program: Building Envelope
		The building envelope is a critical component of any facility since it both protects the building occupants and plays a major role in regulating the indoor environment.
		The building envelope can be considered the selective pathway for a building to work with the climate-responding to heating, cooling, ventilating, and natural lighting needs.
		Envelope design is a major factor in determining the amount of energy a building will use in its operation.
	www.eere.energy.gov /buildings/info/design/integratedbuilding/buildingenvelope.html (3061 words)

	Efficient high performance envelope detector with controlled decay envelope detection - Patent 4370620
		Envelope detector circuits are variously used in many electrical systems, to detect the DC voltage level that represents the peak amplitudes of a corresponding signal.
		For example, in professional audio tape recorders, envelope detector circuits are used to obtain a constantly varying DC level corresponding to the amplitude of the envelope of an amplitude modulated reproduced signal.
		A further object is to provide an envelope detector which generates a convex upward decay voltage which essentially holds the output voltage level within a selectable percentage of the initial input voltage level, for a given period of time such as, for example, longer than the worst expected tape dropout interval.
	www.freepatentsonline.com /4370620.html (3452 words)

	WBDG: Introduction
		The envelope is also a critical system in the determination of the overall performance of the building, with an emphasis on the thermal environment, lighting and acoustical characteristics.
		Acoustic performance for the exterior is the responsibility of the wall system and, to a lesser extent, the fenestration, while daylight transmission and control is the responsibility of the fenestration and the roof (if there are skylights, although these will be designed by the fenestration designers).
		Thus the systems and assemblies of the envelope are one of the four main parts of the building both in terms of their physical existence and in their contribution to overall building performance.
	www.wbdg.org /design/env_introduction.php (6335 words)

	Fundamental Series Item : Building Envelope (Site not responding. Last check: 2007-10-08)
		The term building envelope generally refers to those building components that enclose conditioned spaces and through which thermal energy is transferred to or from the outdoor environment.
		These materials affect the thermal performance of the assembly to the extent that the resistance of the penetrating material is significantly different than the resistance of the insulation.
		Infiltration is uncontrolled inward air leakage through cracks in an envelope element and around windows and doors of a building, caused by the effects of wind pressure and the differences in the outdoor and indoor air density.
	www.energyusernews.com /CDA/Article_Information/Fundamentals_Item/0,2637,15033,00.html (2742 words)

	RRG Research Condition Based Maintenance
		The residuals between an actuator’s healthy performance envelope, its required performance envelope, and the envelope associated with its current condition are converted to DM criteria that are intuitively understandable (e.g.
		Generally, the same performance criteria that were used in determining which actuator to spec for a job will be the same criteria used by the DM/CBM system to determine if the actuator is able to continue doing its job.
		The performance envelope generator uses the estimated parameters to generate a steady state torque vs. speed vs. efficiency performance envelope, which represents the assessed condition of the actuator.
	www.robotics.utexas.edu /rrg/research/conditionb (1808 words)

	Air Barrier Installation
		For this project, the performance requirements are identified in the design of the air barrier system and the construction will be certified through compliance testing and review at the completion of the building envelope.
		Thermal envelope components (insulation, vapor retarders, air barriers, and roof ventilation systems) should be provided and installed in such a manner as to guarantee against problematic ice dam formations for a period of at least 5 years.
		Thermal envelope components (insulation, vapor retarders, and air barriers systems) should be provided and installed in such a manner as to guarantee against plumbing and equipment freeze-ups for a period of at least 5 years.
	www.foam-tech.com /services/specs/air_barrier.htm (5884 words)

	CRDEssay: Annex 32: Integral Building Envelope Performance Assessment
		A new approach to consider the building and the envelope include all aesthetic and physical properties to be fulfilled by that envelope, integrated with the function of the building as a whole.
		Although the envelope in itself is a crucial element for the overall performance of the building, the interaction with other building components and the climatic control systems are of equal importance.
		Therefore, the emphasis of the Annex is on the overall performance of the building seen from the perspective of the envelope.
	alcor.concordia.ca /~raojw/crd/essay/essay000930.html (215 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		Assessment of structure and infrastructure performance is keyed to wind speed estimates experienced throughout the area of impact.
		Poor performance was a function of both inadequate wind resistance and damage from debris impact.
		Details of the shelter or hardened area and the envelope elements should be provided to ensure that the construction requirements are clearly understood by the builder and building official.
	www.fema.gov /fima/mat/txt/fema490/fema490_chap4.txt (6638 words)

	Commissioning for Humidified Buildings
		The product of this envelope performance assessment will be a report showing the ranges of T and RH for the measured locations.
		The objective of the work to be performed at Fort Riley is to identify the envelope performance "signature" of the historic Stockade Building and provide recom-mendations for the pre-design phase of the building commissioning process.
		Once the Building Envelope Commissioning Guidelines are complete, the CA will submit them for review and acceptance to the building owner, the project design team, and other contractors and con-sultants involved in the commissioning process.
	www.cecer.army.mil /techreports/dealcomm.fle/dealcommish.fle-08.htm (948 words)

	WBDG/CCB: Envelope Design Guidelines for Federal Office Buildings: Thermal Integrity and Airtightness
		However, poor thermal envelope performance does occur due to the existence of defects in the envelope insulation, air barrier and vapor retarder systems.
		The goal of this project is to transfer the knowledge on thermal envelope design and performance from the building research, design and construction communities into a form that will be used by building design professionals.
		These guidelines are organized by envelope construction system and contain practical information on the avoidance of thermal performance problems such as thermal bridging, insulation system defects, moisture migration, and envelope air leakage.
	www.wbdg.org /references/ccbdoc.php?i=42&r=1 (247 words)

	Code 4.4 Trade-Off Option
		The building envelope complies with the code if the proposed building satisfies the Mandatory Requirements and the envelope performance factor of the proposed building is less than or equal to the envelope performance factor of the budget building.
		The envelope performance factor shall be calculated using the following equations.
		A radiant barrier factor (RBF) of 0.33 shall be assumed for roof constructions with a qualifying radiant barrier, otherwise RBF shall be assumed to be 1.00.
	www.eley.com /guam/code/code_4-4.htm (374 words)

	Linear actuators, precision motion control systems, precision motion
		The envelope of performance of the motors depicts the max duration and duty cycle of operations of the motors.The limiting factor is thermal assuring the motor temperature doesn’t exceed a maximum rated value.
		One should bear in mind that the eop in vacuum which is described in each manual assumes ambient temperature of 25 C. In case the ambient temperature in vacuum is higher the envelope of performance should be reduced.
		For the LS motor series, the criteria is different, as the maximum velocity is limited to 20mm/sec, and the useful travel is 1500 KM, but the most important feature of the LS motor series is the ability to do as many as 1 billion step and settle motions with high resolution.
	www.nanomotion.com /faq.asp (1058 words)

	Pinzgauer - Performance Envelope (Site not responding. Last check: 2007-10-08)
		One of the most critical considerations when selecting a vehicle for world-wide X-treme Mobility is the track width and overall envelope of space around the vehicle.
		The optimum size is defined as a track width of 1.5m and a vehicle width of not more than 1.8m...
		The hubs, which incorporate straight cut reduction gears, are exceptionally strong and sealed for life to prevent ingress of water, mud or sand.
	www.pinzgauer.uk.com /PerformanceEnvelope.htm (566 words)

	Debunking De Blackpowder (Site not responding. Last check: 2007-10-08)
		Despite a few shrill cries from those who felt you somehow "needed" to measure powder to muzzleload, consumers voted quickly and strongly for convenience with their purchasing dollars, and the "Pellet Dynasties" were born.
		In no way a "fl powder performance substitute," the pressures created are far higher greater than the Pyrodex or flpowder genre products, and so are the muzzle velocities.
		There never has been a simple, cozy "flpowder envelope." The answer was just a bigger bore and more barrel volume in the 1800s, but today's hunters don't care for long, heavy barrels or massive recoil.
	members.aol.com /randymagic/ballltd12.htm (782 words)

	append9 (Site not responding. Last check: 2007-10-08)
		This document begins with a brief description of envelope funding and then outlines the basic principles on which envelope funding will be allocated by LHSC and SJHC, defines the process for transferring funds and provides a list of unresolved issues.
		Envelope Funding refers to the allocation of hospital global budget dollars and UWO operating funds to a medical department.
		3.2 In the absence of envelope funding, the health centre will be responsible for their pro-rata share, as defined by the physicians annual agreement, of the severance liability at the time the physician agrees to assume a new employer/employee relationship with their secretary.
	www.med.uwo.ca /dean/A&R/append9.htm (1457 words)

	t4b
		Building energy performance requirements may be embodied in a model building code or in a separate energy standard.
		In the case of masonry walls, a higher maximum permissible value for the coefficient of thermal transmittance (U-value) for the building envelope is given depending upon where the insulation is located relative to the wall mass.
		Thermal performance criteria in the form of minimum required insulation R-values and maximum permissible U-factors are specified for each element in the building envelope.
	www.bia.org /BIA/technotes/t4b.htm (4796 words)

	Funding Chart with Directions (Site not responding. Last check: 2007-10-08)
		1/ While performance improvements intended to increase the "performance envelope" may not be funded by O&M Appropriations, incidental performance improvements in excess of the design baseline are permitted as long as the primary purpose is to restore initial operational capability.
		Choose the block, at the top of the funding chart that fits the life cycle status and effect on performance of the single cost element of your project, either "in production" or "out of production" and "increase to the then performance envelope" or "no increase to the then performance envelope".
		Incidental increases in performance that result from the cost saving change are permitted but not required.
	www.monmouth.army.mil /cecom/lrc/specstd/ve/fund_chart_dir.html (295 words)

	Performance envelope (Site not responding. Last check: 2007-10-08)
		With this amount of extra power the aircraft can climb straight up, make powerful continual manuvers, or fly at very high speeds.
		Likewise higher altitude can be reached by first speeding up and the going ballistic, a manuever known as a zoom climb.
		This is because when the plane is not flying at the edges of the envelope, its extra power will be greater, and that means more power for things like climbing or manuvering.
	www.portaljuice.com /performance_envelope.html (865 words)

	Performance envelope - InfoSearchPoint.com (Site not responding. Last check: 2007-10-08)
		The key to most aircraft performance is a figure known as extra power, which refers to the amount of power the engines can supply over and above what is needed to simply fly straight and level.
		The amount of extra power varies widely as the initial conditions are changed, for instance most aircraft engines generate less power at increased altitude because they don't have as much air to burn, thereby leading to less extra power.
		Although it is easy to compare aircraft on simple numbers such as speed or altitude, an examination of the performance envelope will reveal far more information.
	www.infosearchpoint.com /display/Performance_envelope (490 words)

	Dynamic Evaluation of the Building Envelope for Wind and Wind Driven Rain Performance
		The dynamic performance of the building envelope can be evaluated in laboratories in which the design details and most of the dynamic properties of the driving forces are simulated.
		Structural performance of the wall assembly is evaluated in the DWTF by applying a series of 0.5 Hz sinusoidal pressure variations to the exterior face of the specimen.
		A comparison of the performance of the facilities is presented in Table 1.
	irc.nrc-cnrc.gc.ca /fulltext/nrcc37886 (3548 words)

	Commissioning and Monitoring the Building Envelope for Air Leakage (Canada Mortgage and Housing Corporation)
		To apply commissioning concepts to an air barrier system, the performance requirements of the installed system need to be established and methods need to be developed for evaluating the design to ensure that, if constructed as designed, the intended performance will be achieved.
		If the building envelope does not pass the final test, a specialist is retained, at the contractor's expense, to investigate and identify the locations of extraneous leakage for repair.
		The builder should also receive a commissioning certificate that certifies the design, construction and performance of the air barrier system in its entirety, including materials and workmanship, were tested and found to perform within the envelope performance limits prescribed by the owner's project brief.
	www.cmhc-schl.gc.ca /publications/en/rh-pr/tech/96235.htm (1138 words)

	S-92 Expands Helideck Performance Envelope (Site not responding. Last check: 2007-10-08)
		STRATFORD, Conn., - Sikorsky Aircraft continues to expand the S-92 flight envelope with new flight manual procedures for European offshore operations that allow the aircraft to either land safely on the helideck or continue flight if an engine is lost during takeoff or landing.
		Performance Class 2 operations accept a limited period of exposure during which the loss of an engine during takeoff or landing from a helideck may result in a forced water landing.
		The JAA is expected to require all twin-engine aircraft to meet the Performance Class 2e criteria by 2010.
	www.sikorsky.com /details_printable/1,3024,CLI1_DIV69_ETI435_PID6534,00.html (325 words)

	ECBCS - Annex 32 - Integral Building Envelope Performance Assessment
		The objective of this annex was to develop the methodology and performances to support the integral design and evaluation process for building envelopes with the aim of realising significant energy, environmental and comfort design.
		The objective of this subtask was to develop a comprehensive assessment methodology based on performance criteria leading to rational strategies for the optimization of building envelopes with respect to their energetic and environmental qualities.
		Its objective is to study the impact of advanced envelopes on whole building performance, by applying devised methodology to identify areas which have (a) a significant impact and (b) a knowledge deficit, by reviewing recent work which addresses these issues, and through relevant case studies.
	www.ecbcs.org /annexes/annex32.htm (643 words)

	Performance Associates - Published Papers
		Particular emphasis is placed on the historical performance implications of larger logical volume sizes on OS/MFT and its descendents, how parallel access volumes (PAVs) address the issue for a single logical volume, potential impacts of RAID schemas on cache misses, cache sizing considerations, access density considerations, and the overall impact of SCSI device size.
		From the perspective of an experienced performance analyst, perhaps the most frustrating aspects of server I/O are the lack of hardware measurement data and the architectural limitations imposed by the traditional bus structures.
		While a variety of conceptual models might be proposed to explain the performance characteristics of these subsystems, this paper will focus on the author's paradigm of a physical I/O subsystem within the logical MVS I/O subsystem and the sibling PEND which results from collisions within the physical disk subsystem.
	www.perfassoc.com /publishedpapers.html (2496 words)

	Broadcaster Performance Envelopes Recalculation Process - Broadcaster Performance Envelopes for 2005-06: Overview (Site not responding. Last check: 2007-10-08)
		As detailed in the 2004-05 Guidelines, Envelopes will be recalculated for the 2005-06 fiscal year according to each broadcaster's performance against a predetermined set of criteria.
		When the initial English-language Envelopes were created for the 2004-05 fiscal year, they were based solely on each broadcaster's historical access to CTF funding.
		Every production that received a contribution through a Broadcaster Performance Envelope in 2004-05 will have its licence evaluated against the average for that genre, format and budget level, as published in the CTF guidelines.
	www.canadiantelevisionfund.ca /pages/application/recalculationoverview.htm (1212 words)

	Hydrostatic Pressure Testing (Site not responding. Last check: 2007-10-08)
		The challenge has been to define a pipe's suitable 'performance envelope' using test methods that take into account the time, temperature and stress/strain dependent properties of the plastics used in pipe fabrication.
		The overall 'performance envelope' is delineated by the intersection of the curves representing each type of failure.
		Through suitable testing, pipe performance in each failure mode can be determined to define the overall 'performance envelope' for a piping product.
	www.janalab.com /newpage71.htm (233 words)

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