3/31/2023 0 Comments Superduper speech therapyAgain, VernaAnn worked above & beyond to help reach skills in both academic & real life settings. Use a modified, Spanish version of Barbara Hodsons Cyles Approach to remediate final consonant deletion. The biggest area of growth has been in S's self confidence and of course, independence! In the fall, S will be entering the first year of college, living on campus! Our only regret is that we didn't start with Lakeshore Speech before high school to get a jump start on all the skills for his long term goals. Super Duper Speech Help me give my students new engaging magnetic fish games, fidgets, and sticker rewards. The ultimate outcome was for S to create, plan & execute short & long term goals on his own. Speech Therapy Store is dedicated to making your speech therapy life easier one resource at a time. Working directly with S helped him to "think through" and create written plans/lists that he would follow through with guided support. 279+ FREE Speech Therapy Digital Materials. ![]() Super Duper 1 F76 ( 5/2/13 ) Student Volunteers Enhance. All of these areas truly blossomed with the help of our therapist. Stupka S'75 ( 4/1/29 ) High School Students Give Speech Therapy S III F75. Executive Functioning impacted Steve's independence and self advocacy which are critical skills needed for transition beyond high school. She worked with our goals, but expanded upon those which included goals to address skills that would empower my son to "think for himself" and problem solve both in school and real life situations. VernaAnn was also able to help with Executive Functioning goals in our IEP which was an area that needed much help. Originally, we started with outside speech to boost & generalize social skills. The store will not work correctly in the. VernaAnn made a great connection to our son and can relate to what a teenager is experiencing & feeling since she has children who are of that age. Super Duper Publications makes fun, practical materials for speech language pathology (SLP), autism, articulation, auditory processing, vocabulary, speech therapy, learning disabilities, grammar, assessment, oral motor, apraxia, phonology, reading comprehension, IEP, early intervention, and dyslexia. Our speech therapist, VernaAnn, has been pivotal in helping my son transition from high school to college. Another parent highly recommended Lakeshore Speech Therapy. ![]() ![]() "We started with Lakeshore when my son S, who is on the Autism spectrum, was in high school. Super Duper Publications Set of 7 Webber® Articulation Card Decks (Combo Set 1) Educational Learning Resource for Children Flashcards for Speech Therapy 19 12500 Get it as soon as Thu, May 5 FREE Shipping by Amazon Only 14 left in stock - order soon.
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3/31/2023 0 Comments Save to dropbox from irecorderOver 14 million paid users choose Dropbox because they know they can count on a company that’s also dedicated to their security and privacy-no matter what they do or where they are. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.ĭropbox is a secure cloud solutions leader trusted by Fortune 500 companies for their most sensitive data. You can turn off auto-renewal anytime from your iTunes account settings. To avoid auto-renewal, turn it off in at least 24 hours before your subscription renews. Your account will be charged for renewal 24 hours before the end of your current billing period. Dropbox subscriptions renew monthly or yearly, depending on your plan. This amount will be charged to your iTunes account at confirmation of purchase and on renewal and will vary by plan and country. And you can protect your work with a watermark, add shared link controls, or rewind your account up to 180 days.īefore starting a trial or completing payment, you’ll see the plan price. You and your clients can comment on most file types without leaving Dropbox. With 3 TB (3,000GB), you can store all your stuff-from work projects to personal photos-and have space to spare. And with Dropbox Rewind, you can roll back any file, folder, or your entire account, up to 30 days.Įxisting Plus customers can upgrade to Dropbox Professional. We’ve also introduced some new features as part of your Plus plan: Dropbox Passwords to store and sync passwords across all your devices and Dropbox Vault to secure and organize your most sensitive documents. You’ll get 2 TB (2,000 GB) of storage space-that’s enough room to save files from all your linked devices. Sign up now for your free Dropbox Plus trial. Sync folders on your PC or Mac to Dropbox with computer backup, and recover older versions or restore deleted files with version history and file recovery.Scan documents, receipts, IDs, photos, and more using your mobile device and transform them into high-quality PDFs, so you can view and send anywhere.Easily send large files by copying and pasting a link you can give to anyone, even if they don’t have a Dropbox account.Access any file in your account-even offline-and preview over 175 different file types with no special software required.Automatically upload videos and photos from your camera roll to cloud photo storage-all in the background-for easy video sharing and photo sharing.With advanced sharing features, it’s easy to share and send photos or files to family, friends, and co-workers. Back up and sync your pictures, videos, documents, and other files to cloud storage and access them from any device, anywhere. Tap the record button to STOP recording.Dropbox lets you upload, save, and transfer photos and files to the cloud.Your video recording will begin automatically. Activate the shortcut (either in the shortcuts app or from a Home screen icon).When you go to use the shortcut, here's what you have to actively do: These shortcuts are as close as you can get to automatically taking and sharing a video with a button. How to add Siri Shortcuts as app-like icons on your Home screen What these shortcuts do Once you tap that icon, the shortcut will run as usual. Because we just want to upload it and share the link, it's better to have the destination predetermined.Īdditionally, to maximize the utility of this shortcut, you might want to add it to your Home screen, where it will appear like an app icon. ![]() If it's on, the shortcut will ask where you want to save your video each time it's run. How to set up the Record & Share shortcut, showing how to enter a contact, then tap Done (Image credit: iMore)Ī couple of notes on this shortcut: you'll want to keep the "Ask Where to Save" switch in the Save action in the 'off' position. These instructions use the iCloud version. in the upper-right corner of the Record & Share shortcut that you've downloaded. While I've provided a link so you can download this shortcut that I've already made, here's how you can set it up for yourself. ![]() ![]() The following instructions are for setting up the iCloud version of the shortcut, but the Dropbox version is the same, minus the Wait action, which isn't necessary, based on how Dropbox creates links. The goal is to give the file enough time to upload to iCloud. The default in the linked shortcut is 10 seconds, but you can experiment with shorter or longer times. Now a caveat about this shortcut: if you're using iCloud, you need to build in a wait time. How to set up the Record & Share shortcut Just tap on the link, then tap on the red Allow Untrusted Shortcut button when it pops up in the Shortcuts app. Share shortcuts, showing how to open Settings, tap Shortcuts, then tap switch (Image credit: iMore)Īfter that, you can add this Record & Share shortcut. 3/31/2023 0 Comments Dropzone sparkypants![]() But this was a perfect example of us talking about it so much and just dismissed it, and we really should have just made it at the start… It took us a morning to do a hacky version of it and it was immediately fun. We always said it was a stupid idea, and our hardcore one-vs-one players also thought it was a bad idea. ![]() “That absolutely came out of the community. That’s where adding the ability to play three-versus-three came about, building on that first vision that the game should just be one-on-one. Finally the team realized that after all their discussions about its merits, they could just build it and find out if it turned out to be fun. One significant change to the original design vision was promoted by the community. We had a saying that if it takes longer to talk about than to implement it we’ll just go implement it,” Coleman reveals. “All the changes came out of experimentation. That resulted in focusing on other key elements that will scratch the strategic itch for traditional RTS players, as well as provide a core entertaining backbone that would entice new players into the fold. “But to do that you have to strip out familiar features of an RTS, such as base-building,” says Coleman. Chief among them was to still guarantee that the experience was really satisfying.Ībove: Action gets intense in the strategy game, Dropzone*. Limiting matches into this digestible format required a set of new considerations for the veteran crew. It meant asking some fundamental questions: What are the biggest challenges we have as gamers? “Time,” states Coleman, “so we’re playing mobile games because that’s where we can find the time, and that’s where the 15-minute time limit came from.” “Vision for what we’re trying to do from the first day was simple: Can we reimagine an RTS for the modern day, and reconstruct it,” says Coleman. Initially codenamed “Sportsball”-with an aim to make it as competitive and accessible as sports-the core premise was to deconstruct the traditional RTS for the modern day. This process also ensures that the original game design doc is essentially thrown out of the window. “It makes us think about games as gamers and developers, and also as spectators,” he adds. “We can jam stuff in, rip stuff out, and it’s really driven our development process,” says Coleman. What has changed for Coleman’s team is how the ability to rapidly iterate the game-almost daily, in fact-has led to consistent improvements. Their first game, Dropzone*, from the new studio, Sparkypants, pulls on some familiar elements of current MOBA games, but adds pieces that have defined RTS games of the past. After a spell contracting, Coleman revealed that many former colleagues from those days of high level realtime strategy game (RTS) development wanted to reunite with all the opportunities still available for crafting unique gaming experiences. His credits include working with legends such as Sid Meier at Microprose on Civilization* II, and also on Rise of Nations*, among others. That’s not the case, though, as even Jason Coleman, founder and President of Sparkypants can attest. You might think it’s pretty easy to start a new game development shop and craft a hit when your résumé reads as a who’s-who of game development royalty. Remake something new Get more game dev news and related topics from Intel on VentureBeat. Similarly, it could also be that Bethesda wanted the studio working on Elder Scrolls: Legends to not be working on other titles simultaneously.The original article is published by Intel Game Dev on VentureBeat*: Refocus. Although Hines downplayed the role of that fact on the decision, it could be that Dire Wolf Digital wanted to put more of its studio’s resources into a new project. That portfolio includes another digital card game, “Eternal”, which released in 2016. The move could be influenced by the fact that Dire Wolf Digital is currently developing several other titles. He also described the card game as having a lot of “untapped potential.” Instead, he described the decision as “an opportunity to alter the direction” of Elder Scrolls: Legends. This certainly reinforces Hines’ statement that the move was not because Bethesda was unhappy. As such, it doesn’t seem that the game has been performing poorly by any means. However, the data-gathering stats service Steam Spy lists Elder Scrolls: Legends as the #7 top-owned card game on Steam, and #4 when it comes to average time spent playing. Why the Change for Elder Scrolls: Legends?Īctual figures for Elder Scrolls: Legends’ sales performance are hard to come by. 3/31/2023 0 Comments Psicologia de la viveza criollaThere is a strong tendency to delegate these overcoming responsibilities exclusively to government authorities. Training, civic engagement, and solidarity were acknowledged as critical in overcoming the crisis. We conclude that education, health, and labor were the most commonly identified crises. Demographic variables and open-ended questions were included in the survey. An exploratory, descriptive, mixed-method study using a phenomenological interpretative approach was conducted to identify the perceptions of Panamanian residents on what type of crisis the country is facing, who is responsible, and how should it be dealt with? This study relies on one online survey distributed across social media platforms over a 5-month period in 2020, generating a non-probabilistic convenience sample of 561 persons. The COVID-19 health crisis and its consequences have exacerbated existing issues in the political, economic, and cultural spheres of societies. Findings from this study contribute to the understanding of value-system changes during crises therefore, further interdisciplinary study of value systems and incidences of values in the Panamanian context are recommended. This may limit the applicability of this conclusion. However, the results related to religious affiliation revealed that the younger generation (18–30-year-olds), which represented one third of the respondents, did not have any religious beliefs. Schools and households appeared to be the places identified as the most significant foci of values education, not the religious communities to which the participants belonged. The main results showed that respect was perceived as the most necessary value to face the crisis by women and men and across age groups, while happiness and cultural diversity were the least important in relation to gender and age variables. The methodology used was quantitative and correlational, with data obtained through online surveys distributed on social media platforms from June to October 2020, with the participation of 502 adults aged 18 and over. A correlational hypothesis is proposed, according to which it is demonstrated that, as societies’ levels of economic and personal security vary, so do their perceptions of their values and the importance they assign to them. The purpose of the article was to explore and analyze social perceptions of values in crisis situations. Todos estos aspectos nos ayudan a comprender la extensión del "juega vivo" como fenómeno que, según la percepción del individuo, puede ser negativo o, por lo contrario, puede ser utilizado como un concepto que derive en prácticas positivas para generar el cambio y desarrollo humano del país.Īs everyday security becomes more important in society, reflection on scientific evidence obtained in relation to other areas of knowledge is required. Se considera también la incidencia del "juega vivo" como sistema de corrupción general, su transformación de ideas a prácticas y finalmente elevado a la categoría de cultura, y se relaciona con la falta de valores y el detrimento de la educación en todos los niveles. La idea fundamental ilustrada en esta ocasión es el "juega vivo" desde su manifestación en el día a día, sus inicios y sus similitudes con otros países del continente (Colombia, Venezuela, Perú, Argentina, Uruguay y Brasil) documentados en la literatura. ![]() El objetivo de este artículo es reflexionar sobre algunas realidades sociales que envuelven a la sociedad panameña. All these aspects help us to understand the extension of juega vivo as a phenomenon that, according to the perception of the individual, can be negative or, on the contrary, used as a concept that can result in positive practices to generate change and human development of the country.Īl aproximarnos al concepto de "Juega vivo", rápidamente lo asociamos a la astucia, y más aún si hemos nacido en Panamá sobre todo si al practicarlo hemos obtenido logros u otros beneficios. ![]() The article also considers the incidence of juega vivo as a system of general corruption, its transformation from ideas to practices and finally raised to the category of culture, and is related to lack of values and detriment of education at all levels. The fundamental idea illustrated on this occasion is the juega vivo since its manifestation day by day, its beginning and its similarities with other countries of the continent (Colombia, Venezuela, Peru, Argentina, Uruguay and Brazil) as documented in literature. The objective of this article is to reflect on some social realities that surround Panamanian society. ![]() As we approach the concept of Juega vivo, we quickly associate it with cunning, especially if we were born in Panama and if by practicing it we have obtained achievements or other benefits. 3/31/2023 0 Comments Itunes macos big surNow, hit File Transfer at the bottom > attachment icon > Files. Launch the Personal app, go to My Devices, and tap your computer’s name to establish a remote connection. Log in with your AirDroid account on both devices. Step 1. Install AirDroid Personal Desktop Client and AirDroid mobile app on the respective devices. The procedure to send data from your Samsung or Android to your Mac is very simple. The interface is designed to allow even non-tech-savvy users to navigate its features without any hassles. Aside from that, you can back up and restore data, control Android from PC, mirror your phone on a PC, control phone notifications, messages, and calls from a desktop, and more, using AirDroid Personal. In addition, it supports all popular data types including pictures, videos, music, contacts, call logs, text messages, bookmarks, apps, and so much more. This means it lets you transfer data from Android to iPhone, iPhone to Android, Android to Android, iPhone to iPhone, and between any smartphone and your PC. And even best is you can share files between any two platforms, not just to Samsung as in the case of Smart Switch. It works perfectly with all devices including Android, iPhone, Mac, and Windows. And yes, it provides wireless data transfer at a blazing-fast speed. Based on user feedback, AirDroid Personal stands out as the most promising program for data transfer across devices. ![]() With so many major downsides of Smart Switch for Mac, the next step is to look for its alternatives. Part 4: A Perfect Alternative to Smart Switch for Mac – Use AirDroid Personal Then, check Calendars and/or Contacts and click on Sync Now to get going. Simply, hit Sync on the main interface of Smart Switch for Mac. Step 6. Similarly, you can sync Calendars and Contacts from Samsung to Mac. For that, click on Restore and select “More Restore Options”, and choose “iTunes backup data” or “Manually select file.” Smart Switch also allows you to restore any third-party backups. Select the latest or any appropriate backup that you want to restore. If you wish to retrieve the saved data from Mac to Samsung, hit the Restore option. Step 3. If you want to save your Samsung data to Mac, simply click on the Backup option. Step 2. When the app detects your phone, you will see the below interface. Step 1. Launch Smart Switch on your Mac and connect the Samsung phone to it. While the Samsung phone should have Android 4.2 or a later version to use Samsung Smart switch Mac.Īfter installing the program on your Mac, here’s how to use its backup and restore features: The program requires your Mac system to be running on macOS X 10.5 or later version having at least 1 GB of memory and 200 MB of space. ![]() Luckily, you can download Smart Switch Mac from its official site. Before learning to use this Smart Switch for Mac, first you need to install it on your system. 3/31/2023 0 Comments Trend micro download![]() , adding extra time and money to corporate remediation efforts and exposing organizations to unnecessary cyber risk. The ZDI observed an increase in failed patches Two out of the top three CVEs reported in 2022 were related to Log4j. ![]() The number of critical vulnerabilities doubled in 2022. (1,706) for the third year in a row is the result of a rapidly expanding corporate attack surface and researcher investment in automated analysis tools, which are finding more bugs. These backdoors primarily targeted web server platform vulnerabilities.Ī record number of Zero Day Initiative (ZDI) advisories Reveals threat actors trying to maintain their presence inside networks for a future attack. Show us that threat actors are gaining initial access through remote services, then expanding their footprint within the environment through credential dumping to utilize valid accounts.Īn 86% increase in backdoor malware detections The roundup report reveals several interesting trends for 2022 and beyond: To manage risk effectively across a rapidly expanding attack surface, stretched security teams need a more streamlined, platform-based approach." A surge in backdoor detections is particularly concerning in showing us their success in making landfall inside networks. "The unrivaled breadth of Trend Micro threat intelligence* reveals 2022 as a year when threat actors went 'all-in' to boost profits. , VP of threat intelligence at Trend Micro: Rethinking Tactics: 2022 Annual Cybersecurity Report 3/31/2023 0 Comments Mac clean disk![]() These files enable the Mac OS X interface to appear in a variety of languages. If you selected the Easy Install option when installing Mac OS X, localization files for over a dozen languages are installed. "Mac OS X 10.4 Help: Archiving files and folders." Clean up system logs and temporary filesįollow the advice in our "Running Mac OS X Maintenance Scripts" FAQ to regularly execute the Mac OS X maintenance routines that clean up System logs and temporary files created as part of the UNIX ® underpinnings of Mac OS X."Mac OS X 10.5 Help: Compressing files and folders."."Mac OS X 10.6 Help: Compressing files and folders.".To use this function, see the following AppleCare® Knowledge Base document corresponding to the version of Mac OS X you are using: These archives are generally far smaller than the original files they contain, provided the original is not already in a compressed format. Mac OS X 10.3 Panther® and later include a built-in function for creating compressed archives of files or folders. If you have not done so already, this is an excellent time to consider implementing a comprehensive backup and recovery solution. Archive old filesĪrchive move, copy and delete, or backup and remove files you do not use regularly to CD or another backup medium. E mptying the applications Trash may delete its contents immediately or move its contents to your personal Trash, which you can then empty as noted above. Some applications, such as iPhoto® and Mail, have their own Trash, spearate from the Trash seen in the Dock. In Finder, select Finder > Empty Trash or, under Mac OS X 10.3 or later, you can also select Finder > Secure Empty Trash.ĭo not use the Trash as a temporary storage area: only put an object in the Trash if you are sure it is no longer needed. Empty the TrashĪs obvious as it may sound, some folks regularly Trash files but neglect to periodically empty the Trash. You can employ any of the following tips to increase the free space available on your Mac OS X startup disk without altering your hardware. In the General pane, the Capacity, Available (free space), and space Used on your startup disk will be displayed, as seen in the following screen shot: The Get Info window for your startup disk will open.Press the Command-I keyboard combination.In Finder®, select your startup disk's icon.To check how much free space is available on your startup disk: Determining available space on your startup disk Additional tips are provided for saving more space if you have a second internal hard drive or an available partition. ![]() While you could replace your current hard drive with a larger model, or install a second internal hard drive if your Mac will support such, the following tips will help you to free some space without changing your hardware. This extract from a chapter of our book Troubleshooting Mac® OS X describes several ways to free-up space on your Mac OS X startup disk, also known as your Mac OS X boot volume. ![]() Freeing space on your Mac OS X startup disk ![]() Powered by CORSAIR iCUE software, the CORSAIR iCUE Commander PRO is everything you need to turn your case into a smart case. Get in-depth insight into your system temperatures in real-time and set up intelligent fan curves to automatically adjust speeds based on your system’s demands.Ĭreate, customize, and synchronize stunning RGB lighting effects when you connect CORSAIR RGB fans and lighting strips for an amazing system-wide light-show. TURN YOUR CASE INTO A SMART CASEĪdd a CORSAIR iCUE Commander PRO for unparalleled control over your system’s performance and RGB lighting. O CORSAIR 275R Airflow é um gabinete ATX mid-tower que combina design moderno com máximo fluxo de ar, graças ao painel frontal ripado e uma janela única de vidro temperado. Protect your system from dust with three easily accessible filters in the front, roof, and floor. Case Windowed, Tempered Glass iCUE enabled, No Radiator Compatibility, 120mm, 140mm, 240mm, 280mm, 360mm Compatible Corsair Liquid Coolers, H55, H60, H75. Two USB 3.0 ports, a 3.5mm headphone/mic combo jack, and a power and reset button give you easy access to the ports you need without clutter or confusion. INTUITIVE BUILT-IN CABLE ROUTINGĮasily and quickly build a clean, beautiful system with integrated tie-downs and cable channels. CORSAIR 275R Airflow Tempered Glass Mid-Tower Gaming Case White Motherboard Support, ATX External Features. ![]() DIRECT AIRFLOW PATHĪn obstruction-free layout channels cool air directly from the slatted front panel to your PC’s hottest components – and back out again – for efficient cooling. EXPANSIVE STORAGE SPACEĭurable, rugged construction steel drive trays provide ample room for up to two 3.5” HDDs and four 2.5” SSDs. THREE INCLUDED 120MM FANSįor powerful airflow out of the box, the 275R comes pre-equipped with three 120mm fans, two intake and one rear exhaust. Room to install up to 6x120mm cooling fans or multiple radiators in sizes up to 360mm. VERSATILE COOLING OPTIONS RADIATOR CAPACITY You may also opt for the Corsair iCUE 5000X ARGB or, on the other end of the spectrum, the Corsair 5000D. Room to install up to 6x120mm cooling fans or multiple radiators in sizes up to 360mm. In this article, we bring you a review of the Corsair 5000D Airflow, which is one of three new full-tower cases based on a brand-new chassis from Corsair. You can click on the part numbers to go to the product page.CORSAIR MID TOWER CASES 275R AIRFLOW MODERN DESIGN, MAXIMUM AIRFLOW HIGH AIRFLOW, MODERN FRONT PANELĪ stylish, slatted front panel design provides ample airflow into your system for more efficient cooling and a uniquely elegant look and feel. It’s available in both black and white, with a glass side. Corsair’s 275R Airflow chassis certainly looks striking, with its latticed front air vents. Many of our mid-tower cases come with glass panels so you can show off the components you have inside, especially if you have RGB LEDs that you have customized with iCUE.īelow is a list of our current mid-tower cases. Corsair 275R Airflow at Amazon for 79.99.
3/31/2023 0 Comments Example of nuclear fission![]() Nuclear fusion, the other process currently under study for the generation of atomic energy, depends on the putting together or fusing of two nuclei to form a single nucleus. Although it may become necessary, this solution is hardly simple or permanent. One suggestion has been to encase such plants in concrete for 100 years or more. Third, obsolete generating plants also present a problem to future generations, for they contain much radioactive material. The radioactivity from spent nuclear fuel and from the products of nuclear fission will remain lethal for thousands of years the safe disposal of these materials is a problem that has not yet been solved. Second, many of the products of nuclear fission are themselves radioactive. This problem has been a continuing concern since the accident at the Three-Mile Island nuclear plant in March 1979 - a concern that has increased in the wake of the disaster at the Chernobyl reactor in the former Soviet Union in April 1986, where radioactive fallout spread within days across the globe. First is the everpresent danger that leaks, accidents, or acts of sabotage will release radioactive materials from the reactor into the environment. Nuclear reactors using fissionable materials pose several serious risks to the environment. Several breeder reactors are now functioning in Europe. Thus, a so-called breeder reactor can produce its own supply of fissionable material. These neutrons can then be used to breed more plutonium-239 from uranium-238. Plutonium-239 also undergoes fission, with the production of more energy and more neutrons. This isotope undergoes beta emission to generate neptunium-239, which, in turn, undergoes another beta emission to produce plutonium-239: However, if uranium-238 is bombarded with neutrons (from uranium-235, for example), it absorbs a neutron and is transformed into uranium-239. The much more abundant uranium-238 does not undergo fission and therefore cannot be used as a fuel for nuclear reactors. ![]() Uranium-235 (natural abundance 0.71%) is very scarce and difficult to separate from uranium-238 (natural abundance 99.28%). About 5600 tons (5.1 X 10 6 kg) of coal are required to produce the same amount of electricity in a conventional power plant. A typical nuclear power plant in operation today uses about 2 kg uranium-235 to generate 1000 megawatts of electricity. Energy generation can be regulated by inserting control rods between the fuel rods in the reactor to absorb excess neutrons, thereby controlling the rate of the chain reaction. The steam then drives a turbine to produce electricity. In nuclear power plants, the energy released by the controlled fission of uranium-235 is collected in the reactor and used to produce steam in a heat exchanger. Each fission results in two (or more) neutrons that can react with other uranium atoms so that the number of nuclear fissions occurring soon reaches an enormous number. In fact, this reaction is the source of energy in the atomic bomb.įIGURE 4.6 Diagram of a nuclear fission chain reaction. Under proper conditions, the fission of a few nuclei of uranium-235 sets in motion a chain reaction (Figure 4.6) that can proceed with explosive violence if not controlled. The brackets around U indicate that it has a highly unstable nucleus. In turn, these atoms split apart, releasing more energy and more neutrons. Some of these neutrons are absorbed by other atoms of uranium-235. When a nucleus of uranium-235 undergoes fission, it splits into two smaller atoms and, at the same time, releases neutrons ( n) and energy. Nuclear power plants currently in use depend primarily on the fission of uranium-235 and plutonium-239. Only a few nuclei are known to undergo fission. In nuclear fission a large nucleus is split into two medium-sized nuclei. The source moves along a circular track, rotating the radioactive beam around the patient, so that only the tumor receives continuous radiation. Industry fall into two categories: fission reactions and fusion reactions.įIGURE 4.5 Cancer treatment with cobalt-60. The nuclear reactions presently used or studied by the nuclear power Of effort and expense has gone into developing nuclear reactors as a source The first nuclear reactor to achieveĬontrolled nuclear disintegration was built in the early 1940s by Enrico FermiĪnd his colleagues at the University of Chicago. A fifth characteristic of nuclear reactions is that ![]() Nuclear decay that form the basis for the use of radioisotopes in the healthĪnd biological sciences. In the previous section we listed four characteristics of radioactivity and 3/31/2023 0 Comments Iclock 660 manual![]() ![]() Pumped solid state 2051 nm laser, and the observation of transitions in Ba+. We describe the performance and frequency narrowing of a diode. Is effectively free of quadrupole (or gradient) Stark shifts which may plague competing ion frequency Of the nuclear magnetic dipole, electric quadrupole, and perhaps magnetic octopole moments.įinally, the hyperfine structure of 137 Ba+ yields an optical transition with unique advantages in a Spectroscopy scheme could measure this structure to parts in 10−8 or better, allowing a determination The metastable 5D3/2 state is currently known to a precision 10−4. Violation experimental concept and describe new ideas.ĭuring the study of the nuclear spinless (I = 0) isotope of Ba+, we discovered several worthwhileĮxperimental goals for an isotope with nuclear spin,īa+ (I = 3/2). Which knowledge of dipole matrix elements is an important prerequisite. Such experimental tests in Ba+Īre in high demand since knowledge of key dipole matrix elements is currently limited to about 5%.īa+ has recently been the subject of theoretical interest towards a test of atomic parity violation for These resultsĬonstitute a new high precision test of heavy-atom atomic theory. (or ac-Stark effect) in these states to a precision of 10−3 at two different wavelengths. We employ this technique to measure the ratio of off-resonant light shifts Ion electron spin resonance experiments in both the ground 6S1/2 and metastable 5D3/2 states at Several projects developed to study the structure of singly-ionized barium and more fundamentalįirst, we describe a spin-dependent ‘electron-shelving’ scheme that allows us to perform single Single trapped ions are ideal systems in which to test atomic physics at high precision: they are effectively isolated atoms held at rest and largely free from perturbing interactions. Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an opticalįrequency standard and atomic parity violation To reproduce and sell (a) copies of the manuscript in microform and/or (b) printed copies of the Zeeb Road, Ann Arbor, MI 48106-1346, 1-80, to whom the author has granted “the right Reproduction of this dissertation may be referred to Proquest Information and Learning, 300 North Purposes, consistent with “fair use” as prescribed in the U.S. I further agree that extensive copying of this dissertation is allowable only for scholarly The University of Washington, I agree that the Library shall make its copies freely available for In presenting this dissertation in partial fulfillment of the requirements for the doctoral degree at This is to certify that I have examined this copy of a doctoral dissertation byĪnd have found that it is complete and satisfactory in all respects,Īnd that any and all revisions required by the final Program Authorized to Offer Degree: Department of Physics Progress on an optical frequency standard and atomic parity violationĪ dissertation submitted in partial fulfillment Single barium ion spectroscopy: light shifts, hyperfine structure, and |
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