Holocaust deniers say that Zyklon B gas was not used in the gas chambers, relying for evidence on the low levels of Prussian blue residue in samples of the gas chambers found by Fred A. Leuchter, which Leuchter dismissed as the results of general delousing of buildings.

The lab tested them for exposure to cyanide and found trace amounts in the crematoria, which Leuchter dismissed in his report:

It is not only this disparity that Leuchter cites, but accordingly from his samples ( which included measurements of it ) that he claims he measured much more cyanide in the delousing chambers than in the gas chambers, which he argues is inconsistent between the amounts necessary to kill human beings and lice.

Due to Leuchter's ignorance of the large disparity between the amounts of cyanide necessary to kill humans and lice, instead of disproving the homicidal use of gas chambers, the small amounts of cyanide which Leuchter detected actually tended to confirm it.

The samples of brick, mortar and concrete that Leuchter took were of indeterminate thickness: not being aware of this, the lab ground the samples to a fine powder which thus severely diluted the cyanide-containing layer of each sample with an indeterminate amount of brick, varying for each sample.

* Mr. Death: The Rise and Fall of Fred A. Leuchter, Jr. ( 1999 )

David Irving, Robert Faurisson, Ernst Zündel, Fred Leuchter, Arthur Butz, Joseph Sobran, Pete McCloskey, Bradley R. Smith, Carlo Mattogno, Jürgen Graf, Doug Collins and Radio Islam founder Ahmed Rami have attended conferences and / or contributed to publications of the IHR.

The manager of the analytical laboratory hired by Leuchter states in an interview in Errol Morris ' film Mr. Death: The Rise and Fall of Fred A. Leuchter, Jr., that Leuchter's thick samples of brick would have greatly diluted the cyanide residue, which forms only an extremely fine layer on the walls and cannot penetrate.

Working closely with Robert Faurisson, who was also assisting the defence, Irving contacted Warden Bill Armontrout of the Missouri State Penitentiary who recommended that Irving and Faurisson get into touch with Fred A. Leuchter, a self-described execution expert living in Boston.

Irving and Faurission then flew to Boston to meet with Leuchter, who agreed to lend his alleged technical expertise on the behalf of Zündel's defence.

As to what evidence further led Irving to believe that the Holocaust never occurred, he cited the Leuchter report by self-styled execution expert Fred A. Leuchter, which claimed there was no evidence for the existence of homicidal gas chambers at the Auschwitz concentration camp.

Irving said in a 1999 documentary about Leuchter: " The big point the Leuchter report: there is no significant residue of cyanide in the brickwork.

After the trial, Irving published Leuchter's report as Auschwitz The End of the Line: The Leuchter Report in the United Kingdom in 1989 and wrote its foreword.

While we had expected that compulsive children in the unstructured school setting would have difficulty when compared to those in the structured, we were surprised to find that the achievement of the high compulsives within the schools where the whole-word method is used in beginning reading compares favorably with that of the low compulsives.

The low number of abnormalities compares favourably with the health condition of a Majungasaurus population of which it in 2007 was established that 19 % of individuals showed bone pathologies.

In particular, the Reynolds number ( which compares the effect of momentum of a fluid to the effect of viscosity ) can become very low.

* Budget CPU Shootout-Popular hardware review website Anandtech compares low priced CPUs

" Addressing MSNBC ' S low ratings, Kaplan quoted CNN co-founder Reese Schonfeld, who said that " verybody compares MSNBC to Fox and CNN — when its real competition is Headline News ".

Looking at this point, a study done by Dr. Benjamin C. Warf compares different shunt systems and highlighting the role of low cost shunt systems in most of the developing countries.

He also compares modern texts which describe different periods, and calculates low correlation, as expected.

The control algorithm compares driver input to vehicle response and decides, when necessary, to apply brakes and / or reduce throttle by the amounts calculated through the state space ( set of equations used to model the dynamics of the vehicle ).

" Chao compares General Chinese to how Chinese was written when the writing system was still productive: " This amounts to a 100 percent use of writing Chinese by ' phonetic loan ' [...] The situation is that when the ancients wrote a character by sound regardless of meaning, it was a ' loan character ', whereas if a modern schoolboy writes one, he is punished for writing the wrong character!

SAR performance limits mean that the fastest IP router ATM interfaces are STM16-STM64 which actually compares, while POS can operate at OC-192 ( STM64 ) with higher speeds expected in the future.

A meta-study by Hershberger ( 2001 ) compares the results of eight different twin studies: among those, all but two showed MZ twins having much higher concordance of sexual orientation than DZ twins, suggesting a non-negligible genetic component.

This compares to some intensive farm systems in the United States that milk three or more times per day due to higher milk yields per cow and lower marginal labor costs.

If one compares the per capita income to the actual cost of living, the number of people living below the poverty line is considerably higher.

A SAE paper from 2003 deals with a high-speed, small-displacement sleeve-valve engine, calculated, but not experimentally shown, to have a higher SFC than the poppet-valve alternative, a year-2009 work compares two different side-opening intake strategies for sleeve-valve engines.

" He compares her work with other novelists of the time and concludes that hers reaches a much higher quality.

The Bulgarian University Ranking System, maintained by the Bulgarian Ministry of Education, compares academic programs in accredited domestic higher education institutions.

When one compares the rendered results of an 8: 1 anisotropically filtered scene to a 16: 1 filtered scene, only a relatively few highly oblique pixels, mostly on more distant geometry, will display visibly sharper textures in the scene with the higher degree of anisotropic filtering, and the frequency information on these few 16: 1 filtered pixels will only be double that of the 8: 1 filter.

The ranking compares 1200 higher education institutions worldwide according to a formula that took into account alumni winning Nobel Prizes and Fields Medals ( 10 percent ), staff winning Nobel Prizes and Fields Medals ( 20 percent ), highly-cited researchers in 21 broad subject categories ( 20 percent ), articles published in the journals Nature and Science ( 20 percent ), the Science Citation Index and Social Sciences Citation Index ( 20 percent ) and the per capita academic performance ( on the indicators above ) of an institution ( 10 percent ).

This compares somewhat higher than EIA reported Washington State average prices ( at 1000 kwh and 68 therms ) of $ 83 per month electrical and $ 80 per month gas, but somewhat lower than national household averages of $ 115 electrical and higher than national gas averages of $ 64.

* A new type of perception involves " multilevelness ," a vertical view of life that compares lower versus higher alternatives and now allows the individual to choose a higher resolution to a crisis over other available, but lower, alternatives — the developmental solution.

In terms of self ranked quality of life Israelis rate their own lives on a scale numbered from zero at the bottom to ten at the top, Israelis ' average rating in 2007 was 6. 84, which is far higher than the 4 average for the world and compares with Denmark's 8, among the world's top.

According to BBC server logs, the show receives around 50, 000 online requests per week ( though this can be significantly higher, with the 2003 Ibiza show attracting more than 96, 000 requests ), which compares to the show's " live " audience of 80, 000.

However, Leadhills ' slightly more exposed and elevated location than Braemar results in absolute minima being higher than one might expect-the December absolute minimum of compares favourably to usually milder Glasgow Airport's absolute minimum of.

Romanian-American professor Cezar Giosan further compares the genre in an article in Dilema Veche with the early stages of rock-and-roll ( and Elvis ), early rap and reggaeton, music starting out from the outcast classes of society, being shunned by the higher classes for the simple reason of its origin, only to explode into mainstream later on.

The peak popularity at 0. 02 % of boys names in 1994 compares to a peak popularity in England and Wales of about 1. 2 % in 1963, 60 times higher.

The article considers how est compares to more standard psychotherapy techniques such as behavior therapy, group and existential psychotherapy before concluding with a call for " objective and rigorous research " and stating that unknown variables might have accounted for some of the positive accounts.

A throat swab is not sensitive but is 100 % specific if positive, and compares favourably with sputum culture.

Often one compares against a scientific control or traditional treatment that acts as baseline.

The formula proposes calculation of ALE ( annualised loss expectancy ) and compares the expected loss value to the security control implementation costs ( cost-benefit analysis ).

The control panel compares the credential's number to an access control list, grants or denies the presented request, and sends a transaction log to a database.

A controlled experiment generally compares the results obtained from an experimental sample against a control sample, which is practically identical to the experimental sample except for the one aspect whose effect is being tested ( the independent variable ).

For example, if an experiment compares a new drug against a standard drug, then the patients should be allocated to either the new drug or to the standard drug control using randomization.

) The pulse waveform is built by joining all the DAC bits together via a long strip of polysilicon, connected to the pulse control logic that digitally compares current accumulator value to the pulse width value.

This review panel then issued its own 24-page report ( PB 211-014, available from NTIS ), which concluded that " the 1960-63 Corvair compares favorably with contemporary vehicles used in the tests ... the handling and stability performance of the 1960-63 Corvair does not result in an abnormal potential for loss of control or rollover, and it is at least as good as the performance of some contemporary vehicles both foreign and domestic.

The game's database compares it to Sakura's transformation into MOMO, Wilhelm planned to use KOS-MOS ' control of the Anima through her emotional bond with chaos to start Zarathustra.

The equipment uses most closely compares to modern telemark systems, with a stiff plastic boot offering good downhill control, and a binding system that allows it to pivot at the toe for cross-country striding.

This review panel concluded that " the 1960 – 63 Corvair compares favorably with contemporary vehicles used in the tests ... the handling and stability performance of the 1960 – 63 Corvair does not result in an abnormal potential for loss of control or rollover, and it is at least as good as the performance of some contemporary vehicles both foreign and domestic.

It was adopted to signify the Fellows ' determination to establish facts via experiments and comes from Horace's Epistles, where he compares himself to a gladiator who, having retired, is free from control.

In the simplest type of an automatic control loop, a controller compares a measured value of a process with a desired set value, and processes the resulting error signal to change some input to the process, in such a way that the process stays at its set point despite disturbances.

When each subtable is encountered, the layout engine compares flags in the subtable against control flags, generally derived from user settings.

The Eryx missile uses a SACLOS guidance system, the launcher tracks a light source on the rear of the missile and compares its position with the center of the launcher's cross-hair, sending corrective signals down a trailing control wire.