What we call the secret of happiness is no more a secret than our willingness to choose life Essay Example

What we call the secret of happiness is no more a secret than our willingness to choose life Essay Example What we call the secret of happiness is no more a secret than our willingness to choose life Essay What we call the secret of happiness is no more a secret than our willingness to choose life Essay Essay Topic: Life Of Pi My first serious lesson about choices came to me when I was fourteen. Sometimes, it seems to me it was to early for a 14 year old to make a choice between two parts of the family – my mother and brother, and my father, and, moreover, between the life paths to take – move to the USA, or stay in Romania. It was my first serious opportunity to change my life radically, and I used it as fully, as I could. People say, it is much easier for teenager to make serious choices, as they have little to loose, but that wasn’t the case. I had to loose lots of things – part of my family, my friends, my home I grew up in, the whole life I was used to. That is when it first came to me that you couldn’t make a choice without sacrificing something that is valuable for you.The fact that I learned this truth at quite an early age was a great help for me in the next years.   I took it for granted that to achieve high academic results I had to spend less time with my fr iends and my family, and that to achieve my goals I had to sacrifice time and efforts.During my studies at school, and at college I also understood the value of time as a resource. I was always keen to participate in different community activities, and balancing time between my studies, work, volunteering and research I wanted to perform, was quite a challenging task. Nevertheless, during my studies at college I managed to participate in one of the most important research programs in my university, the one that dealt with designing, synthesizing, and characterizing polymer and inorganic metal nanoparticles with biocompatible or bioactive applications using a supercritical processing technique called RESOLV (Rapid Expansion of a Supercritical Solution in a Liquid Solvent), work as a volunteer in Shands Medical Hospital, create two publications, concerning my future occupation etc. In the fall trimester of 2003, I was awarded by the Presidents Honor Roll for academic achievement.After graduation I began working for the Beckman Coulter as a Junior Chemist. My work there is interesting, and sometimes challenging, but I feel I am not satisfied enough with what I am doing. When I volunteered in the Emergency room of the Shands Medical Hospital, I felt that it was the place, where the real work was done. Of course, technical and medical advancements are very important for restoring and promoting the well being of people, who suffer, but it is only through service that I can feel my life has a purpose and meaning.The decision to enter medical school was quite a hard one to make. It was one of those choices that demanded giving up something valuable to get the thing you want. Continuing my education in the medical field means that I will have to give up my current work, and that I’ll have much less time for research in my previous filed of study. Nevertheless, I feel this decision will allow me to live in peace with myself, as I will be doing the things that are really valuable for me, the ones, that fill my life with sense. I feel that all people deserve for care when they need it, and talking to the patient, comforting him or just being near him is sometimes more valuable than inventing a drug that would improve his physical condition.In addition, I am very keen to continue my education. The reason is that I like the process of getting new knowledge, analyzing and systematizing it, and seeing my competency grows with the amount of knowledge I get. Choosing medical school is an additional and very important stimulus for me to achieve academic excellence, as the level of responsibility is extremely high in this job. I am attracted by the possibility to build a career in a field where I am strongly motivated to be the best professional possible.In fact life is a bout of choice, small ones and big ones. It is often that people don’t realize the importance of this or that action, and it is seen only after time passes. This is not the c ase. I realize that my choice to build a career in medical field will change my life radically, and, maybe, forever. I am ready to accept the consequences of my choice; moreover, I wait forward for them.

X Ray Definition and Properties (X Radiation)

X Ray Definition and Properties (X Radiation) X-rays or x-radiation are part of the electromagnetic spectrum with shorter wavelengths (higher frequency) than visible light. X-radiation wavelength ranges from 0.01 to 10 nanometers, or frequencies from  3Ãâ€"1016  Hz to 3Ãâ€"1019  Hz. This puts the x-ray wavelength between ultraviolet light and gamma rays. The distinction between x-ray and gamma rays may be based on wavelength or on radiation source. Sometimes x-radiation is considered to be radiation emitted by electrons, while gamma radiation is emitted by the atomic nucleus. German scientist Wilhelm Rà ¶ntgen was the first to study x-rays (1895), although he was not the first person to observe them. X-rays had been observed emanating from Crookes tubes, which were invented circa 1875. Rà ¶ntgen called the light X-radiation to indicate it was a previously unknown type. Sometimes the radiation is called  Rà ¶ntgen or Roentgen radiation, after the scientist. Accepted spellings include x rays, x-rays, xrays, and X rays (and radiation). The term x-ray is also used to refer to a radiographic image formed using x-radiation and to the method used to produce the image. Hard and Soft X-Rays X-rays range in energy from 100 eV to 100 keV (below 0.2–0.1  nm wavelength). Hard x-rays are those with photon energies greater than 5-10 keV.  Soft x-rays are those with lower energy. The wavelength of hard x-rays is comparable to the diameter of an atom. Hard x-rays have sufficient energy to penetrate matter, while soft x-rays are absorbed in air or penetrate water to a depth of about 1 micrometer. Sources of X-Rays X-rays may be emitted whenever sufficiently energetic charged particles strike matter. Accelerated electrons are used to produce x-radiation in an x-ray tube, which is a vacuum tube with a hot cathode and a metal target. Protons or other positive ions may also be used. For example, proton-induced x-ray emission is an analytical technique. Natural sources of x-radiation include radon gas, other radioisotopes, lightning, and cosmic rays. How X-Radiation Interacts With Matter The three ways x-rays interact with matter are Compton scattering, Rayleigh scattering, and photoabsorption. Compton scattering is the primary interaction involving high energy hard x-rays, while photoabsorption is the dominant interaction with soft x-rays and lower energy hard x-rays. Any x-ray has sufficient energy to overcome the binding energy between atoms in molecules, so the effect depends on the elemental composition of matter and not its chemical properties. Uses of X-Rays Most people are familiar with x-rays because of their use in medical imaging, but there are many other applications of the radiation: In diagnostic medicine, x-rays are used to view bone structures. Hard x-radiation is used to minimize absorption of low energy x-rays. A filter is placed over the x-ray tube to prevent transmission of the lower energy radiation. The high atomic mass of calcium atoms in teeth and bones absorbs x-radiation, allowing most of the other radiation to pass through the body. Computer tomography (CT scans), fluoroscopy, and radiotherapy are other x-radiation diagnostic techniques. X-rays may also be used for therapeutic techniques, such as cancer treatments. X-rays are used for crystallography, astronomy, microscopy, industrial radiography, airport security, spectroscopy, fluorescence, and to implode fission devices. X-rays may be used to create art and also to analyze paintings. Banned uses include x-ray hair removal and shoe-fitting fluoroscopes, which were both popular in the 1920s. Risks Associated with X-Radiation X-rays are a form of ionizing radiation, able to break chemical bonds and ionize atoms. When x-rays were first discovered, people suffered radiation burns and hair loss. There were even reports of deaths. While radiation sickness is largely a thing of the past, medical x-rays are a significant source of man-made radiation exposure, accounting for about half the total radiation exposure from all sources in the U.S. in 2006. There is disagreement about the dose that presents a hazard, partially because risk depends on multiple factors. It is clear x-radiation is capable of causing genetic damage that can lead to cancer and developmental problems. The highest risk is to a fetus or child. Seeing X-Rays While x-rays are outside the visible spectrum, its possible to see the glow of ionized air molecules around an intense x-ray beam. Its also possible to see x-rays if a strong source is viewed by a dark-adapted eye. The mechanism for this phenomenon remains unexplained (and the experiment is too dangerous to perform). Early researchers reported seeing a blue-gray glow that seemed to come from within the eye. Source Medical Radiation Exposure of the U.S. Population Greatly Increased Since the Early 1980s, Science Daily, March 5, 2009. Retrieved July 4, 2017.