Sensitivity of Schlieren Imaging Sensitivity of the system is the minimum changes in input parameters that effects the output parameter is called sensitivity . In other words Sensitivity of measuring system is define as the ratio between the detected change to the parameter that cause the changed.[2] Sensitivity is very important parameter of the schlieren imaging without having sensitive system results will not be clearly understandable . In order to design a good schlieren system sensitivity should not be compromise . Schlieren Imaging is very sensitive technique to visualize the process that cannot be seen through naked eye [1] Sensitivity of the schlieren technique depends upon many factors though which it can be controlled easily like, 1.Light Source: Selecting a right light source is important for the sensitivity of the schlieren imaging .Bright and monochromatic light sources are essential for schlieren imaging .Laser is monochromatic light sources with high output power , these qualities help to avoid chromatic aberration .[6] If the size of the source light is large then sensitivity will be low [7], this can be overcome by using small source aperture or using pinhole in micrometers. 1. Lenses : Lenses body: Lenses are the main hardware of the schlieren imaging , in order to achieve maximum sensitivity it is obvious to …show more content…
because knife edge cover the undiffracted part of the light source by changing the distance percentage of light stop by knife edge is also altered
For data collection the following parameters were set up; in Smart Accessory Change window click OK and make sure setting is on Transition E.S.P., under Collect and Experimental Setup set scan number to 20 and resolution to 0.5 on the Collect tab, on the Bench tab selected a window material and wavelength number range (1950-2250 cm-1 for (v’=1 v’’=0) and 4100-4350 cm-1 for (v’=2 v’’=0)), on the Quality/Parameter tab made sure box was unchecked next to “special range…” and selected the maximum resolution, and clicked ok.
In order to find out what are some of the key drivers’ of the analysis I will further run different sensitivity analysis. I think some of the key drivers of our assumptions could be sales growth, production costs as a percentage of sales, inventories as a percentage of cost of goods sold etc.
If we look at the sensitivity analysis, we find as WACC increases, the percentage of US$360M investment in Deltex also increases. When WACC is 5.8%, the percentage of US$360M investment in Deltex is equal to 30% equity of Deltex.
Magnetic resonance imaging (MRI) is considered as one of the pioneers in medical imaging for diagnosis of pathologies involving soft tissues and internal structures. MRI provides good contrast resolution between different soft tissues of the body especially in brain, muscles, heart etc compared to other medical imaging modalities like computed tomograpgy (CT) and conventional radiography which utilizes x-rays for imaging. The other important aspect of MRI versus other imaging modalities like CT and conventional radiography is that MRI uses no ionizing radiation like x-rays for imaging, instead it uses a strong magnetic field to align the magnetization of some atoms within the body , then uses radiofrequency pulses to systematically alter the alignment of this magnetization. This process causes the nuclei of certain atoms to produce a magnetic field which can be detected by the scanner, and all this information is used to reconstruct an MR image of the scanned area of the body. The initial experiments by Sir Otto Stern in the year 1922 stated that physically the magnetic resonance ima...
Sensitivity analysis is a technique used to determine how different values of an independent variable will influence a particular dependent variable under a given set of assumptions. The presentation describes elements that affect health care staffing at Patton-Fuller, such as raises in wages and changes in the nurse-to-patient ratio.
One of the most recently new advances in radiology is the use of magnetic resonance imaging (MRI). MRI has been around for the past century. It was at first called Nuclear Magnetic Resonance (NMR) and then it changed to MRI once there was an available image. Walter Gerlach and Otto Stern were the first scientists to start experimenting with the magnetic imaging. Their very first experiment was looking at the magnetic moments of silver by using some type of x-ray beam. The scientists then discovered this was by realizing that the magnetic force in the equipment and in the object itself. In 1975, the first image was finally created using and MRI machine. The scientists used a Fourier Transformation machine to reconstruct images into 2D. The first images ever use diagnostically was in 1980. This is when hospitals began to use them. At first the images took hours to develop and were only used on the patients that needed it most. Even though MRI has been around for a long time, it has advanced and has been one of the best imaging modalities recently (Geva, 2006).
As a starting point in CT diagnostic imaging the form of radiation used to provide an image are x-rays photons , this can also be called an external radiation dose which detect a pathological condition of an organ or tissue and therefore it is more organ specific. However the physics process can be described as the radiation passes through the body it is received by a detector and then integrated by a computer to obtain a cross-sectional image (axial). In this case the ability of a CT scanner is to create only axial two dimensional images using a mathematical algorithm for image reconstruction. In contrast in RNI the main property for producing a diagnostic image involves the administration of small amounts of radiotracers or usually called radiopharmaceutical drugs to the patient by injection or oral. Radio meaning the emitted of gamma rays and pharmaceutical represents the compound to which a nuclide is bounded or attached. Unlike CT has the ability to give information about the physiological function of a body system. The radiopharmaceutical often referred to as a nuclide has the ability to emit ga...
Light rays gather through the opening of the telescope called the aperture and pass through the objective lens and refract onto a single point called the focal point. From there, the light rays continue in the same direction until it hits the eyepiece lens, which also refracts the light back into parallel rays. During the process, the image that enters our eyes is actually reverse of the original image and magnified because of the size in which we perceive the image.
If we wish to measure a thing "A" then the test has to be able to measure "A" even when very little of "A" is present; this is sensitivity. Specificity means when we measure "A" with our test, we know that the test does not measure "B", "C," or "D."
Measuring devices in the laboratory as well as in some industries mostly have a display unit through which the output is taken. The process of output data collection from display is usually done manually or by data acquisition cards which may not be always available. Moreover, commonly available data acquisition cards are very costly. So a solution of this data acquisition problem is proposed using a webcam and processing unit which can be arranged for at a nominal cost. Further it can eliminate the error of human eye as well as adjust the interval of taking the reading.
I chose this topic because I a found it as a very interesting thing which I wanted to know more about. I have been CT-scanned when I had concussion after a car accident when I was seven. Also because my father has been under a CT-scanner and a lot of my friends.
d) Beyer T, Freudenberg L, Townsend D, Czernin J (2010). The future of hybrid imaging—part 1: Hybrid imaging technologies and SPECT/CT. Insights Into Imaging: 1-9. [PMC free article]. URL http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3288981/
For so many years I’ve asked myself the question, “what are you going to do with your life?” For a period of time I struggled with this question. Today, I sit staring at my computer, confronting myself, asking my subconscious “what do I want to do for the rest of my life?” Have I finally found the answer I 've been looking for, or am I under the false assumption that this is the right path for me. This semester has been the ultimate opportunity to explore my questions, doubt, issues, and concerns. I feel that by the end of this paper I will have answered all these questions, and will have made the best decision for my future.
During his wide studies of optics, Alhazen was first to challenge the Greek’s theory of how the light comes out of the eye, and disproved it by proving how light bounces off of object and goes into our eye. To prove this, he studied the eye works itself using knowledge of previous scholars and dissection. Using this, he started to explain how light enters the eye, is focused and then gets projected to the back of the eye, where the image will be flipped upside down. With this knowledge, he was able to study the pinhole camera, which is one of his inventions. His concept of a pinhole camera is simple: a box with a tiny hole on one side is able to project an image of whatever is outside onto a side of the box on the inside.
No operator wants to set machine every time to get the best and same result. This is why; measurement of accuracy is a hot topic of research now a days and many processes and methods have been invented to investigate these processes. In this project we are going to talk about the indirect measurement of machines.