Former Paratrooper and Army Officer, "Blackfive" started this blog upon learning of the valorous sacrifice of a friend that was not reported by the journalist whose life he saved. Retired Special Operations Master Sergeant, Jim Hanson ("Uncle Jimbo") is now focused on writing about the military, politics, intelligence operations and foreign policy.
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Chris Carter is a former USAF firefighter and now civilian firefighter who covers military history, national security, and baseball. Twenty-three years of Active and Reserve service in the US Army in SF (18B), Infantry and SOF Signal jobs with operational deployments to Bosnia and Africa. A Marine who began his blog in Iraq and reflects back on what he learned there and in Afghanistan. Uber Pig was an Infantryman from late 1991 until early 1996, serving with Second Ranger Battalion, I Corps, and then 25th Infantry Division. COB6 spent 24 years in the active duty Army that included 5 combat tours with service in the 1st Ranger Battalion and 1st Special Forces Group .
Currently COB6 has a son in the 82nd Airborne that just returned from his third tour and has a newly commissioned daughter in the 4th Infantry Division.
When you start to take in the traits that confident people have you will start to build self confidence. In this article I explain the important principles in metrology and measurement systems analysis (MSA). This page is the first part of a series of pages explaining the science of good measurement. The first thing you should understand about metrology is that no measurement is exact or certain. All measurements have uncertainty; a measurement is in fact just an estimate, it might be a much better estimate than the one you can make just by looking at something, but a measurement can never tell you the exact value.
In metrology we must be very clear about the level of our uncertainty at a given confidence level.
The larger the range of uncertainty we assign, the higher our confidence becomes that it encompasses the “true” value. It is very important that we are all using the same standards of measurement around the world.
A traceable measurement is one which has an unbroken chain of calibrations going back to the primary reference standard, with uncertainties calculated for each calibration. The tolerance for a dimension defines an upper specification limit (USL) and a lower specification limit (LSL).


In the next section I will explain a bit more about uncertainty of measurement introducing types of uncertainty and the principles which must be understood to evaluate uncertainty. When you give this sort of hand shake, the interviewer may think that you are self confident.
Wait….if you are a H1 dependent company, be ready for huge employee attrition and change of jobs. Wolf after the Harvey Kietel character in Pulp Fiction, when "challenges" arose, they called on Mr.
Since retiring he's worked as Senior Defense Analyst on SOF and Irregular Warfare projects and currently ensconced in the emerging world of Cyberspace.
Metrology is the science of measurement and is important in areas such as science, manufacturing and trade. Thinking again about looking at a bolt and estimating the length, we might say “it’s about 100 mm give or take 5 mm”.
We can carry out an uncertainty evaluation which includes analysis and experiments to determine the uncertainty of a measurement. When parts are manufactured the machines are set and the finished parts are checked using measurements. For example when a ruler is made it might be compared with a reference ruler to determine where the markings are positioned. Uncertainty of measurement is inherited down the chain of calibrations so that uncertainty increases the further we get from the primary reference standard. Repeatability measures how the results of a measurement vary when the measurement is repeated under the same conditions and within a short period of time. He is independent in politics and covers topics including journalism, military, weapons, preparedness, space, science, cooking, food and wine, product and book reviews, and even spirituality. Metrology enables us to know the accuracy of measurements and to ensure common standards are used. By using the same standards of measurement we know that a nut made in China will fit to a bolt made in the USA.
Traceability from the primary reference, through accredited metrology laboratories and on to industrial metrology departments ensures that we are all working to common standards and know the uncertainty of measurements.
Precision describes how closely repeated measurements of the same quantity show the same results. There are some simple rules which allow us to state, at a given statistical confidence level, whether a measurement proves or disproves conformance.
In order to prove conformance, at a given confidence level, we must add the expanded uncertainty (U), at that confidence level, to the LSL and subtract the expanded uncertainty from the USL.


In science this means we know whether an experiment actually proves what it appears to prove or whether the result could be due to inaccuracy in a measurement.
We would be more confident in saying that the bolt is 100 mm plus or minus 10 mm than we would be in saying it is within 5 mm.
For a normal distribution we would have a 67% confidence the true value is within 1 standard deviation of the measured value, a 95% confidence it is within 2 standard deviations and a 99.7% confidence it is within 3 standard deviations. Calibration is the way that the standards are transferred from one country to another, and from one instrument to another. The markings will not be at exactly the same positions as the ones on the reference ruler; there will be some uncertainty in the calibration process. It is also possible that the result may be inconclusive in which case we may wish to make further measurements with reduced uncertainty. In manufacturing it means we can make parts which fit together and perform as they were designed to. Standard deviations and the normal distribution are explained in detail in Part 2: Uncertainty of Measurement. The primary reference standards for the SI units of measurement are held in France and each country compares their national standards against these. The reference ruler itself will also not have markings at exactly the right positions since there was some uncertainty when it was calibrated. By using visualization, you start to plant the seeds in your subconscious mind and you will begin to build self confidence. Calibration lab’s compare their standards against the national standards and then use these to calibrate instruments. The ruler has uncertainty from both the reference standard used to calibrate it and from the calibration process, therefore an instrument must always have a greater uncertainty than the instrument which was used to calibrate it. When an instrument is calibrated the uncertainty of the calibration should always be evaluated. Remember that you are the most important person in your life, so start investing in yourself. Give yourself the character traits that you wish to have and really feel the emotion as if you already posses those characteristics. The more familiar you are with what you are not confident about, the less intimidating that thing will be.



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