The CEBAF Large Acceptance Spectrometer (CLAS) delves into secrets of particle's structure Jefferson Lab researchers utilize CLAS and CEBAF's 5.7 GeV continuous beam to gather new insights on several fundamental questions about the neutron The CEBAF Large Acceptance Spectrometer (CLAS) is like a perfect survey instrument. Because it surrounds the interaction point in Jefferson Lab's Hall B, it can record several particles produced in a subatomic interaction at once. More than 40,000 data channels convey information on the trajectory (measured with drift chambers), speed (time of flight counters) and energy (electromagnetic calorimeters) for all detected particles, up to 3,000 times a second. Often, multiple experiments run at the same time in Hall B, and data for all of them are collected simultaneously. During the recent (February through mid March) run dubbed "E6," researchers used CLAS together with CEBAF's 5.7 GeV continuous electron beam to gather new insights on several fundamental questions about the neutron. The neutron is one of the two building blocks (together with the proton) of every nucleus, and its properties are just as interesting and important as those of the proton. Unfortunately, these properties are usually obscured because neutrons are generally bound inside nuclei. E6 collaborators from several universities and Jefferson Lab, working on the experiment "Electron Scattering from a High Momentum Nucleon in Deuterium" are seeking a clearer view of this elusive neutral partner of the proton. This experiment was proposed by co spokespersons Keith Griffioen, College of William and Mary; and Sebastian Kuhn, Old Dominion University. Kuhn, an ODU associate professor of physics, says that the overall results of the study, which ended March 10, appear promising. "We're not ready to say we've found new things in our data. So far, we haven't analyzed enough data to say what ultimately we'll discover," he contends. "What we can say is that we've developed a method of extracting the true energy needed to excite a neutron resonance, even if the neutron is moving. We collected all the data we were hoping for; and I believe we'll learn important things about the neutron's internal structure." Scientists must observe neutron behavior indirectly because single neutrons are inherently unstable. That's why researchers must use the nucleus to study neutrons, Kuhn explains. Unbound from their stable pairing with protons inside the nucleus, neutrons which have more than 1,800 times the mass of electrons and are just slightly more massive than their partnering protons decay by emitting radiation, in the form of a proton, an electron and a particle known as an antineutrino. Experimenters directed Hall B's electron beam into a vial filled with deuterium liquid. Deuterium is a "heavy" isotope of hydrogen, with one proton and one neutron in its nucleus. Because both are bound together in the atomic nucleus as a pair, their movements are mirror images of each other. As either is ejected from the nucleus, the other is liberated as well, and scientists are able to infer their initial motion from the resultant trajectories. "We basically take a snapshot of how fast and in what direction the proton, and therefore the neutron, was moving before being hit by the electron," Kuhn explains. "Our experiment can tell us two things. First, it reveals what's going on inside the neutron. Secondly, it tells us how being bound to a proton changes its properties." Kuhn suggests another method of visualization might be to compare the scattering process to using a hammer to gauge the nature of a water glass. If one would touch a hammer lightly to the glass, without breaking it, certain properties like smoothness and shape could be inferred. (This is called "elastic scattering" in physics and has been used to measure form factors of the proton and neutron in JLab's Halls A and C.) Strike the glass lightly with the hammer, and the sound it makes reveals more about the structural composition of the glass and, therefore, its method of manufacture. (This corresponds to the excitation of neutron resonances through "inelastic scattering.") Ultimately, the hammer could break the glass; examining the pieces could yield even more insights. "If you hit it really hard and smash the glass in physics, when we hit a target at high energies, we call it 'deep inelastic scattering' you learn from the size of the pieces and how much they resist the hammer blows," Kuhn explains. "In all of these cases, knowing how the neutron ? 'the glass' ? was moving before striking it with the 'hammer' allows us to get much more accurate and detailed information." Scientists also want to compare the properties of fast and slow moving neutrons, since high initial speed means that the proton and neutron were close to each other before the neutron was struck. In this Hall B experiment, most of the observations occurred on fast moving neutrons, which may have a modified structure because of the close proximity of protons. A slow moving neutron, on the other hand one that moves no faster than one tenth the speed of light "is as close to a free neutron as one will ever get," Kuhn says. "Then we can really learn about neutron structure." To do this, Kuhn and his colleagues have formed the Bound Nucleon Structure Collaboration, or BONUS, which hopes to conduct a follow on experiment. If approved, that study would run in Hall B, during 2004. Scientists would also like to learn more about neutrons colliding with their proton partners before both fly apart. According to a theory called "Color Transparency," if the neutron is struck hard enough, it becomes compressed momentarily and can more easily avoid colliding with the proton on the way out. Details of this process would prove invaluable in painting a complete picture of these two building blocks of nuclear matter. Data on this process were collected for the second experiment of the E6 run, which was proposed by Kim Egiyan, Yerevan Physics Institute; Keith Griffioen, W and Mark Strikman, Pennsylvania State University. Doernbecher 10s ,Fire Red 5s Air Jordan 3 Joker Air Jordan 7 Retro Orion 2011 Air Jordan 12 Taxi Black Toe 1s Venom Green 10s Grape 5s Air Jordan 9 Motorboat Jones Air Jordan 3 Fear Our daughter is larger at well at 23 and change. She is also in 12 18 month clothes. Her fleece jackets and snow suits are all 18 months. But I think most babies are in 9 12 month clothes? can't begin to describe how many clothes we have that she has never worn, or wore only a few times because it was too small. I would definitely err on the side of bigger. I certainly wouldn't buy anything smaller than 9 months, and I probably wouldn't buy anything smaller than 12 months. As for shoes, we really don't wear shoes. She has one pair of boots, but she just kicks them off anyway. That will be changing soon as she stands and eventually walks more, but for now we really only own one pair of shoes. (are we in the minority for that?). I find that in the winter we like some long sleeve tops and onsies, lots of pants, whereas during the summer we were wearing all short sleeves and dresses. A couple of fleece jackets are a must. Nice warm footed sleepers are great, though the feet can make the length too short. Doernbecher 10s,I gotta admit I'm a huge movie fan. For me there's nothing better than sitting down with some popcorn and watching a flick. Recently I've received a number of emails from visitors wondering where they can download movies online, so I thought I would put together a quick article about this. There's a lot of people who have started to downloads all of their movies. The internet has made it so that you don't necessarily need to run out to the store to pick up the latest DVD. The selection of movies available online is unbelievable. You can find far more movies online than you ever could in a video store. Whether it's a golden oldie or a new release, chances are that you can find it online. So where can you download movies online? Let's take a look at that question now. There's a few options out there and obviously some are better than others. Ok, first off we should point out the websites to avoid when it comes to movie downloads. You may have heard of download sites like LimeWire or Kazaa. Please stay away from these! There's so many viruses floating around and it's easy to get flooded with spyware. Plus, when you search for movies you often get incomplete files and end up downloading something completely different than what you wanted. Another issue you can find is that the download speeds are very slow on these types of sites. You can literally wait over a day for a file to finish downloading. Obviously it's frustrating to wait that long just to find out the file doesn't work! An alternative is using websites that offer downloads on a "pay per download" basis. Here you pay for each movie you download. Each download is usually in the $10 range. Although it doesn't sound like a bad idea, you can find less expensive options. Your best bet is to join a specialized movie download website. With these sites you pay a one time registration fee (usually $40 $50) and can then login and download whatever movie you want. These websites are assembled specifically to offer movie downloads and are able to put together a massive selection of movies. It's easily your best choice as you can download unlimited movies and you won't have to worry about slow download speeds or files that don't work. Downloading movies online is a great way to get your favorite movies without having to go to the video store.
Up To 80 Discount Off Doernbecher 10s,Air Jordan 6 Infrared 2014 We all fascinated by how our bodies work. Recent exciting advances, such as the human genome sequence or research into stem cells, have intrigued us all with their promise of new ways to treat complex diseases. Over the next decade, we start to see the impact of these developments in our daily lives, but none of this would be possible without human biology. When you study for this degree at Birmingham, you focus on the aspects of biology which are most relevant to our own species; genetics, physiology, cell biology, evolution and development, for example. It a flexible programme that gives you a broad understanding of biological principles, but also lets you pursue your own interests and helps you to fulfill your career ambitions. 2014 National Student Survey "95% of students said that overall they were satisfied with the quality of our Human Biology course." Humans are arguably the most complex living species on this planet. From genetics to embryonic development to mechanisms of disease, studying human biology entails many facets. As a degree course, Human Biology is a platform from which you can embark on diverse careers, not limited to the life sciences. The School of Biosciences encompasses over 60 academic staff with research interests across the full spectrum of biology. Immunity and infection, cancer biology, cellular signalling, and human reproduction are represented as well research into human blood disorders, such as leukaemia or cardiovascular disease. With a Human Biology degree, you will acquire a wide range of skills that enable careers not just in the life science, but across a wide range of professions. Taking advantage of one of the 4 year course options will add value to your CV and help you to stand out. However, a University degree course is not just about a professional education, it is first and foremost about studying was fascinates us most. For inspiration, check out our collection of related research stories. 2013 National Student Survey "96% of students said that overall they were satisfied with the quality of our Biology and Related Sciences courses" The Human Biology course offers you a comprehensive view of man as a biological species. You will study genetics, physiology, cell biology, evolution and development. Each year of study will feature one or several signature modules that are exclusive to the Human Biology course, along with modules that draw on relevant content from our full spectrum of degree courses. The modular structure of the course allows you to follow your specific interests in Human Biology. Following a first year, where all modules compulsory, you will enjoy an increasing level of freedom of choice in the 2nd and final year. Below we outline the modules available for each of the three years. For more detailed descriptions of individual modules download Human Biology Module Descriptions (PDF 385KB). The core component of the final year is the Project, which covers 40 of 120 final year credits and stretches over both Semester 1 and 2. In dialogue with a lecturer or professor, you will do your own research and be led to intellectual independence. A diverse spectrum of elective modules allows you to explore individual facets of human biology according to your personal preference and interests. You may choose between a laboratory project, a two part library research or a computing based project. Students choose their project from an extensive list near the end of their 2nd year. Some even arrange a project independently in collaboration with an academic member of staff. Signal transduction in and between cells, G protein coupled receptors, phospholipid and Ca2+ signalling, ligand gated ion channels and electrical responses. Watch video Evolution of bacterial virulence, antibiotics and antibiotics resistance, genomic data in analysing pathogenicity. Enquiry based learning in groups and individually on topics such as are animals built the way they are? assurance and parental behaviours and Consciousness in animals and concepts of self. Biological clocks, neural basis of complex natural behaviour; learning, memory, orientation and navigation how they help animals to cope with changing environmental conditions. Bacterial and viral pathogens explored from the perspective of their molecular structures, protein misfolding and amyloid diseases. How genes are switched on or off in response to external stimuli, how control of gene expression can be explored experimentally. Watch video Evolution of the immune system, innate immunity, cell biology of immunity, structural basis of discrimination between self and non self. Doernbecher 10s I have these ones called BeautiFeel. I have no idea what company they are made from. They too were pricey, but so worth the ! I find that the most comfy shoes are usually more $, but you can't put a price on comfort and your health. Truly if you do not have comfy shoes it affects your feet, back, hips, and mood. have heard that Clark's are also comfy, but I have no firsthand knowledge of them. I didn't have to break them in and have never gotten a blister or sore feet from them. They are actually from Israel. I looked them up online. You can go to their site and find stores near you. I got mine at The Walking Company store. I am ready to go get a black pair to go with my brown ones. Oh, and I also wear UGGs in the winter. They are like wearing slippers all day and keep your feet extra warm for recess duty (if you have that).
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