Why to follow the cut off time in test

My Problem is that I can't figure out how to answer this question: The component values in the previous measurements have been known and the cut-off frequency could be calculated. In real life, this is not always the case, as components may suffer considerable tolerances causing the cut-off frequency to diverge from its theoretical value. Assume a high-pass filter with unknown components is given and you are tasked to determine the cut-off frequency. Define methods to do so in a “real” lab scenario I don't get any of this question. Even if there are tolerances, I can figure the output, can't I? Therefore I don't understand why I should find the method to determine cutoff-frequency. \$\begingroup\$ If you are tasked to verify what the cutoff frequency is or whether it is in component tolerance, yes you have to measure what the cutoff frequency actually is with some method. And since it is a lab task, you need to think how to measure it with given equipment, as there can be multiple methods to do it. \$\endgroup\$ \$\begingroup\$ @Lundin The way the original question is phrased I interpret it as "describe what you would do if there were no COVID-19 so the lab was open", I guess the author of the problem is happy if OP can describe it with virtual components. OP writes in a comment that "Unfortunately the Lab is online". \$\endgroup\$ It seems to be your task to figure out how to do this, and we don't solve homework for people. But your actual question here seems to be: I don...

What does “Cut-off level” mean? Essentially, it means separating the positives from the negatives. In drug and alcohol testing, a cut-off level is a level at which the concentration of a substance in your breath, urine, or saliva, indicates a safety risk. So if your sample tests below the cut off level, your test has a negative result, and if your sample is equal to or above the cut-off, your test result is positive unless otherwise noted by a Medical Review Officer. These cut-off levels are designed to identify a level which indicates a safety risk to the donor, their fellow workers, and their working environment. The most common and simple example of a cut-off level is the 0.08BAC (80 milligrams or more of alcohol per 100 milliliters of blood) as outlined in the Canadian Criminal Code [1]. If you take a breathalyzer and blow 0.08 or over, you are considered a risk to other drivers and yourself according to the criminal code (each province has their own cut-off levels, which range from 0.04-0.08). So when it comes to occupational drug and alcohol testing, similar standards have been put forth for alcohol, as well as cannabis, cocaine, opioids, phencyclidine, and amphetamines. These cut-off levels are set by corporate policies and resulted by a laboratory, while point-of-collection devices all come with predetermined screening levels. How are cut-off levels defined? The cut-off levels for drug and alcohol tests, whether for urine or oral fluid testing, are determined by co...

Authors' Affiliations: 1Gastroenterology and Hepatology, VU University Medical Center, Amsterdam; 2Gastroenterology and Hepatology, Kennemer Gasthuis, Haarlem; 3Gastroenterology and Hepatology, Slotervaart Hospital, Amsterdam; 4Internal Medicine, Zaans Medical Center, Zaandam; and Departments of 5Epidemiology and Biostatistics, 6Clinical Chemistry, and 7Pathology, VU University Medical Center, Amsterdam, the Netherlands Author contributions: J.S.Terhaar sive Droste and F.A. Oort participated in the design of the study, data acquisition, data analysis, and interpretation as well as in writing of the manuscript. Both authors approved the final draft that was submitted. R.W.M. van der Hulst participated in the design of the study, data analysis, and interpretation. He approved the final draft that was submitted. H.A. van Heukelem, R. Loffeld, S.T. van Turenhout, I.B. Larbi, S.L. Kanis, M. Neerincx, and M. Rakers participated in the data acquisition of the study. All of the coauthors approved the final draft that was submitted. V.M.H. Coupe participated in the statistical analysis and approved the final draft that was submitted. A.A. Bouman supervised test analysis and approved the final draft that was submitted. G.A. Meijer and C.J.J. Mulder participated in the design and data interpretation of the study and supervised the writing of the manuscript. Both approved the final draft that was submitted. Citation Jochim S. Terhaar sive Droste , Frank A. Oort , René W.M. van der Hul...

Not to be confused with Mini–mental state examination Folstein test Purpose measure cognitive impairment The mini–mental state examination ( MMSE) or Folstein test is a 30-point questionnaire that is used extensively in clinical and research settings to measure Administration of the test takes between 5 and 10 minutes and examines functions including registration (repeating named prompts), attention and calculation, et al. in 1975, in order to differentiate organic from functional psychiatric patients Advantages to the MMSE include requiring no specialized equipment or training for administration, and has both validity and reliability for the diagnosis and longitudinal assessment of Other tests are also used, such as the Hodkinson Test features [ ] Interlocking pentagons used for the last question The MMSE test includes simple questions and problems in a number of areas: the time and place of the test, repeating lists of words, arithmetic such as the A version of the MMSE questionnaire can be found on the British Columbia Ministry of Health website. Although consistent application of identical questions increases the reliability of comparisons made using the scale, the test can be customized (for example, for use on patients that are Category Possible points Description Orientation to time 5 From broadest to most narrow. Orientation to Orientation to place 5 From broadest to most narrow. This is sometimes narrowed down to streets, Registration 3 Repeating named prompts Att...

With the increase in positive COVID tests, physicians, contact tracers, and hospitals in our town are very busy. I would imagine the same can be said for your community. With this time of year being normally very high for hospital usage, a strain in the healthcare industry has come to all regions from all angles. Might there be a better way we can use our resources wisely? Knowing COVID patients' cycle threshold (Ct) values could benefit patients, physicians, and their community. Many patients test positive for COVID without any symptoms. What does that mean? Medical tests need to be taken in context. Patients question whom they might have gotten it from, whom they might have given it to, and why their spouses -- whom they have lived with in close contact -- do not have it. Some become deniers of proper restrictions and proper healthcare, only making everyone more vulnerable. For certain patients, knowing the Ct value is not useful. In the first few days when a patient may be early in their infection and not exhibiting any symptoms, the viral load may not have risen high enough to cause a useful Ct value. In these situations, antigen tests done sequentially may be more useful. As the viral load increases, however, knowing Ct values becomes more helpful. These can be another piece of data that a physician can use to manage a patient's care. Patients with symptoms who come to the hospital and have a high Ct number (meaning less viral load) and few comorbidities might be best...