![]() The tutorial initializes with a grating periodicity of 1000 nanometers (producing a spatial frequency equal to 1000 lines/millimeter) and an incident light beam of 700 nanometer wavelength impacting the grating at a 90-degree angle. The spacing between the centers of two adjacent slits ( P) is called the grating period, and the reciprocal of P is termed the spatial frequency, which is measured in the number of slits or periods per unit length. The most convenient and accurate method of forming gratings of this type is through the use of metallic vacuum deposition techniques. In its simplest form, a line or amplitude grating is composed of a linear array of thin opaque strips (or slits) having a periodic spacing and suspended on a solid matrix, usually an optical glass plate. This interactive tutorial explores the mechanics of periodic diffraction gratings when used to interpret the Abbe theory of image formation in the optical microscope. Light passing through the grating is diffracted according to the wavelength of the incident light beam and the periodicity of the line grating. Cloth and feathers, which are both made up of many smaller, thinner parts, produce complicated diffraction patterns.Light Diffraction Through a Periodic Grating - Java TutorialĪ model for the diffraction of visible light through a periodic grating is an excellent tool with which to address both the theoretical and practical aspects of image formation in optical microscopy. Light that passes around the hair spreads out, overlaps, and produces a diffraction pattern. Thin objects, such as a strand of hair, also diffract light. In fact, the angle between two adjacent dark bands in the diffraction pattern is inversely proportional to the width of the slit. The narrower the slit, the more the light spreads out. This different amount of bending gives the blobs their colored edges: blue on the inside, red on the outside. Red light, for instance, has a longer wavelength than blue light, so it bends more than blue light does. The angle at which the light bends is proportional to the wavelength of the light. Where the trough of one wave overlaps with the crest of another wave, the waves cancel each other out, and you see a dark band. Where the crest of one wave overlaps with the crest of another wave, the two waves combine to make a bigger wave, and you see a bright blob of light. The light waves that go through the slit spread out, overlap, and add together, producing the diffraction pattern you see. The black bands between the blobs of light show that a wave is associated with the light. Rotate each object while you look through it. Look at the light through a piece of cloth, a feather, a diffraction grating, or a piece of metal screen. Rotate the hair and watch the line of blobs rotate. Move the hair until it is between your eye and the light source, and notice that the light is spread into a line of blobs by the hair, just as it was by the slit. Stretch a hair tight and hold it about 1 inch (2.5 cm) from your eye. Notice that the blobs have blue and red edges and that the blue edges are closer to the light source. As you squeeze the slit together, the blobs of light grow larger and spread apart, moving away from the central light source and becoming easier to see. If you look closely you may see that the line is composed of tiny blobs of light. While looking through the slit, rotate the pencils until they are horizontal, and notice that the line of light becomes vertical. Notice that there is a line of light perpendicular to the slit. Squeeze the pencils together, making the slit smaller. Hold both pencils close to one eye (about 1 inch away) and look at the light source through the slit between the pencils. The tape wrapped around one pencil should keep the pencils slightly apart, forming a thin slit between them, just below the tape. ![]() Hold up the two pencils, side by side, with the erasers at the top. Place the light on a stable surface at least one arm’s length away from you. ![]()
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![]() ![]() Gettysburg National Military Park Gettysburg National Military Park Read More: Top-Rated Attractions & Things to Do in Hershey, PAģ.For those who want to skip the big park and just visit the zoo, admission is available at a lower rate.Īddress: 100 Hersheypark Drive, Hershey, Pennsylvania Zoo guests can also sign up for special behind-the-scenes tours to get a closer look and an opportunity to help feed the animals. Here, visitors can see more than 200 animals from North American habitats, including bald eagles, mountain lions, and even roadrunners. Adjacent to the park and included in admission is ZooAmerica. Other attractions include midway-style games and two large video arcades. There are also several water rides perfect for a hot summer's day and more than a dozen roller coasters designed to thrill. In addition to kiddie rides, the park has all the family favorites like a carousel, train, bumper cars, and Ferris wheel. Hershey Park continues to expand, offering a wide range of things to do for all ages. The park was originally built in 1906 as a recreational area for Hershey's workers but expanded over the years to attract visitors from all over. Hershey Park is the town's main attraction with 90 acres of rides and entertainment for kids and adults, ranging from roller coasters to aquatic shows. Hershey Park Rollercoasters at Hershey Park | George Sheldon / įamilies will enjoy an outing to this famous amusement park in Hershey, a town also closely associated with chocolate. ![]() From the urban attractions of historic Philadelphia to the numerous parks and open country, there is something for everyone here.įind your new favorite things to do with our list of the best tourist attractions in Pennsylvania.Ģ. Other places to visit in Pennsylvania have earned their fame for less serious reasons, like Hershey, which is known for its chocolate manufacturer, and Punxsutawney for its weather-predicting groundhog. The city of Pittsburgh is known for its industrial roots and the cultural legacy of the Carnegie family, while the capital city of Harrisburg is loved for its small-town feel and historic buildings. Pennsylvania Dutch country is home to the unique culture of the Amish, whose dedication to simplicity and tradition continues to draw visitors who are looking for a peaceful weekend getaway. It is also known as the Quaker State for the religion of the state's namesake, William Penn. Tourists will find an abundance of historic landmarks and attractions, from the Liberty Bell in Philadelphia to the Valley Forge and Gettysburg battle sites. Constitution, and the Gettysburg Address were written. It is here that the Declaration of Independence, U.S. Pennsylvania is known as the Keystone State for its role in building the foundations of the United States of America. ![]() ![]() Description of Nike Air Jordan 13 “Obsidian” Modelģ. Jordan, and it has become a pair suitable for representing the “Jordan brand”. In addition, the color is very much reminiscent of the team color of the NBA team “Charlotte Hornets”, which is owned by Mr. The Air Jordan 13 first hit shelves in November 1997 as MJ rocked the singular silhouette in pursuit of his sixth world title. Obsidian R 3 599,95 The Air Jordan 13 first hit shelves in November 1997 as MJ rocked the singular silhouette in pursuit of his sixth world title. That is constructed with a white base color upper, accented with a cold blue color to match every outfits. The new color “Obsidian” is based on a white color upper. The Air Jordan 13 comes in white/obsidian/dark powder blue. ![]() It is also famous for being worn during Jordan’s last season with the Chicago Bulls, which was called the “Last Dance”. Shop the Air Jordan 13 Retro GS Obsidian and other sneaker drops on GOAT. Photos of Nike Air Jordan 13 “Obsidian”Īir Jordan 13 is Michael Jordan’s 13th signature model, with a “black panther” motif.Ī paw-like outsole and a hologram design on the heel that resembles a sharp eye of black panther.The upcoming Obsidian version is guaranteed to excite fans of Jordans sneakers. The rest of the build incorporates white leather and grey synthetic suede, which. Gym Red replaces the older shoe’s blue accents, appearing on the interior tongue, collar lining and the reflective mesh overlays that dominate the upper. Lottery of Nike Air Jordan 13 “Obsidian” The AJ13 has since had a resurgence thanks to a partnership with CLOT. The Air Jordan 13 Retro ‘Red Flint’ takes its design cues from the OG ‘Flint’ colorway from 1998.Matching branding notes and Swooshes play. ![]() Debuted in August 2019, this 'Obsidian' version tributes MJ's college alma mater through a team-inspired, color block palette on the leather upper.
![]() ![]() Hopefully, this guide will have helped in showing you how to get started with BlueStacks and enjoy your favorite mobile games on PC. All it takes is a few clicks, and you’re set. If you’re not sure which version is the most recent, simply go to and click on “Download BlueStacks.” This will automatically download the latest version of our app player.ĭownloading and installing BlueStacks has never been as easy as with BlueStacks 4. ![]() However, with BlueStacks 4, you can easily upgrade to a newer version of our app player without having to uninstall the previous one. ![]() For obvious reasons, this process was quite cumbersome. In the past, whenever you wanted to upgrade to a new version of BlueStacks, you had to manually uninstall the previous version before running the new installer. Once finished, your BlueStacks will be updated to the latest version, while keeping your apps and data intact.Just click on the “Update” button and let the installer run its course. If you have a previous version installed, you will be prompted to update instead of running a clean install.Download the latest version of BlueStacks from our website and run the installer.To upgrade an existing version of BlueStacks to a more recent one, please follow these steps: How to Upgrade From a Previous BlueStacks Version Once you’ve finished downloading the BlueStacks installer, click on it to run it.ĥ. exe e conclua a configuração em minutos para começar a jogar seus jogos favoritos para celular no PC. Você pode baixar o BlueStacks 5 nos links desta página ou em nosso site. All you need to do is navigate to our website and click on the ‘Download BlueStacks’ button. Drivers gráficos atualizados da Microsoft ou do fornecedor do chipset. How to Download BlueStacksīefore you install BlueStacks 4, you must first download the latest version of our client from our website. Once you’ve checked that your PC can run BlueStacks, you can go ahead and proceed with the installation. Internet: Broadband connection to access games, accounts, and related content.Graphics: Intel/Nvidia/ATI, Onboard or Discrete controller with PassMark score >= 750.Processor: Intel or AMD Multi-Core Processor with Single Thread PassMark score > 1000.Up to date graphics drivers from Microsoft or the chipset vendor.You must be an Administrator on your PC.(Note that having 4GB or more disk space is not a substitute for RAM) RAM: Your PC must have at least 4GB of RAM.BlueStacks Requirementsīefore you install BlueStacks, you must first check that your PC fulfills the following requirements: However, in case you have any questions about the process, here’s a more detailed explanation: 1. Wait until the process finishes, after which BlueStacks will launch automatically.Īnd that’s it! Once you’re done, you’re ready to start gaming on BlueStacks.Launch the installer once it’s done downloading.Go to and click on “Download BlueStacks” to get the latest version of our app player.Here are the steps to download and install BlueStacks on PC: ![]() ![]() ![]() With Yealink Noise Proof Technology, acoustic echo cancellation, and dereverberation, the MeetingBar A20 with built-in 8 MEMS microphone arrays and speaker allows users to enjoy a full-duplex voice experience seamlessly without interruption and to be heard and speak clearly in a meeting.Ĭoming with the revolution of Microsoft Teams Rooms system on Android, Yealink MeetingBar A20 is announced at Ignite 2020, showing great features including one-click join, dual-screen share, whiteboard collaboration, etc. With the 133° wide-angle lens and Auto Framing, it can recognize the number of and the position of attendees, framing everyone smoothly in the most appropriate view even in small spaces. The MeetingBar A20 camera is equipped with AI technology, including Auto Framing and Speaker Tracking. Keep Everyone Engaged with 20MP AI-powered Camera Featuring innovative audio and video capabilities. The built-in 8 MEMS microphone arrays and speaker in Yealink MeetingBar, completely cover up to 6-meter medium-sized spaces. It features a 20-megapixel sensor and 120 field of view, which ensure an ultra-clear and ultra-wide view even in small conference room. External Hard Drives Back External Hard Drives Yealink MeetingBar, is redefining the future of meetings with its simple, smart, and sustainable solutions. Yealink MeetingBar A20 is designed for small rooms.DVD & Blu Ray Drives Back DVD & Blu Ray Drives.Printer Ink Toners Back Printer Ink Toners.Printer Ink Cartridges Back Printer Ink Cartridges.Wireless Networking Back Wireless Networking.Security & Surveillance Back Security & Surveillance.Routers & Firewalls Back Routers & Firewalls The Yealink MeetingBar A20 for small rooms and MeetingBar A30 for medium rooms are all-in-one video collaboration bars designed to deliver an excellent audio.Phones & Conferencing Back Phones & Conferencing. ![]() Networking Cables Back Networking Cables. ![]() Open a web browser and enter the device IP address in the address bar.
![]() ![]() He serves on the editorial board of New Retina MD and Evidence-Based Ophthalmology. He has authored numerous articles and book chapters, and has been invited manuscript referee for the journals: Ophthalmology, American Journal of Ophthalmology, Retina, British Journal of Ophthalmology, and Retinal Cases and Brief Reports. He has been an invited instructor at the American Academy of Ophthalmology and invited speaker to present scientific papers at both national and international meetings. ![]() Gupta has been awarded numerous research grants from local and national organizations, including the National Institutes of Health. He was the primary provider of medical and surgical retinal care for the health system and an active teacher to residents and medical students.ĭr. Gupta was Assistant Clinical Professor of Ophthalmology at Temple University Hospital, where he acted as Co-Director of Research and served on the Surgical Safety Committee. Prior to joining Mid Atlantic Retina, Dr. This group overseas the guidelines and operations to ensure the best patient care is delivered in an efficient manner. He also was selected to serve on the Bylaws Committee of Retina Society and represents the entire Retina Service on the Wills Eye Hospital Operating Room Committee. He served as the President of the Greater Philadelphia Ophthalmic Society. He is an active member of the American Academy of Ophthalmology, Retina Society, American Society of Retinal Specialists, Greater Philadelphia Ophthalmic Society, Society of Heed Fellows, Wills Eye Hospital Alumni Society, and Association for Research in Vision and Ophthalmology. Michels Retinal Fellowship Foundation Award. As a vitreoretinal fellow, he was awarded two prestigious national honors, the Heed Ophthalmic Foundation Fellowship Award and the Ronald G. Gupta completed his ophthalmology residency at Wills Eye Institute where he was selected by his peers and attending staff to serve as Chief Resident. He was elected to Alpha Omega Alpha Honor Medical Society and graduated with a Doctor of Medicine with Distinction in Research and a Masters in Business Administration with a concentration in Health Sciences Management.ĭr. Simon Graduate School of Business Administration. He was then the first graduate of the combined 5-year MD/MBA program at the University of Rochester School of Medicine and Dentistry and William E. Gupta, MD, MBA is a Board Certified ophthalmologist who graduated Magna Cum Laude and Phi Beta Kappa from the University of Rochester with a Bachelor of Science in Molecular Genetics. Medical School: University of Rochester. ![]() ![]() "I'm not a guy that's sitting down because I'm doing load management - well, when I was with the Raptors, it was different like, I was coming an injury," he told reporters at his press conference. In short, teams must now ensure that only a single star player sits out of any given game - rather than having multiple usual starters sitting on the sidelines. When one sought a response to the new player participation policy, he replied: "What are they?" Inevitably, reporters asked Leonard about injuries during media day. READ MORE: NBA plan radical rule change to directly impact playing time of each team's stars He comes into this season after tearing the meniscus in his right knee during the postseason, the same joint he tore the ACL in during the 2021 playoffs. ![]() Seeing the two-time NBA champion in street clothes on the sidelines has become common since signing with the Clippers.Īlbeit, the five-time All-Star selection would attest to having more than his fair share of significant injuries during his career. Leonard, 32, is the face of load management across the league after popularizing the regimen that dates back to his departure from the Toronto Raptors. "We want him to know that the second biggest fan base of the Toronto Raptors are in Riverside ," Jeff Dietz, a member of the coaching staff during Leonard's tenure, told CBC's Kim Brunhuber.Los Angeles Clippers star Kawhi Leonard had to have the new NBA player participation policy explained to him after asking what the rules changes were at his media day press conference. His high school alma mater just outside of Los Angeles is vocal in its support for Leonard despite its location in the Golden State. Wong described Leonard as a homebody in his youth with close relationships with his mother and four sisters. "Basketball is the place for him to get away from everything else that is on his mind. ![]() "I don't want to speak for him, just because that was such a personal experience for him, but I think by all accounts, whatever happened in high school and the things that he had to deal with made him gravitate toward basketball more," Wong said. Today on Front Burner, freelance sports writer Alex Wong helps us understand the man behind the calm exterior and shares his thoughts on whether Leonard will stay in the North when this historic series ends. It's an exciting time for fans of Raptors superstar Kawhi Leonard. ![]() Stoic façades and finely honed basketball fundamentals are hallmarks of the Spurs organization - even to the point of parody - and Leonard appeared to be the heir to Tim Duncan's monotone throne.įront Burner 25:21 Why Kawhi Leonard is more than just a stoic NBA superstar Featured VideoThe Toronto Raptors face the Golden State Warriors for game three of the NBA Finals tonight. Leonard was named NBA Finals MVP in 2014 for shutting down LeBron James and the Miami Heat, and he earned a pair of Defensive Player of the Year awards and a selection to the all-NBA first team. Before that, he was well on his way to elite status in the NBA. Leonard played just nine games last season as a member of the San Antonio Spurs due to a prolonged recovery from a right leg injury. The four rim bounces on that last shot may have endeared a wider Canadian audience to the team and Leonard, but what's at risk of being overlooked is the lifetime of effort that preceded it. Duration 1:24 Featured VideoKawhi Leonard poured in 41 points, including a dramatic game-winner as the Toronto Raptors beat the Philadelphia 76ers 92-90 to advance to the Eastern Conference Finals. ![]() ![]() ![]() Renaming an enum value will still break the database data.column does not need to take the ORDINAL EnumType value since that’s used by default.Removing existing elements from ann Enum will require to shift all entries in case you are using ORDINAL.If we add a new value in the middle or rearrange the enum’s order, we’ll break the existing data model. New enum elements must be added to the end of the list.ORDINAL can use a SMALLINT which is the most compact db option.Database specification for Enum data type // todo.persist the ordinal with persist the String with JPA 2.1 Annotation.You cannot assign anything else other than predefined Enum constants to an Enum variable The value returned by this method may differ from the one returned by the Object.getClass() method for enum constants with constant-specific class bodies.Įnums are POJOs.Two enum constants e1 and e2 are of the same enum type if and only if e1.getDeclaringClass() = e2.getDeclaringClass().GetDeclaringClass() - Returns the Class object corresponding to this enum constant’s enum type. It’s added by the compiler.įor ( Planet p : Planet. It’s not part of Enum’s java documentation. The values() static method of the enum returns an array of all constants that are declared in the enum. Ordinal() – position of the constant within enum type. compareTo() – Enum implements Comparable.toString () – to return constant’s name.hashCode () – because equals is overridden.finalize () – to ensure that constants cannot be finalized.equals () – Returns true if the specified object is equal to this enum constant.This guarantees that enums are never cloned, which is necessary to preserve their “singleton” status. clone () – Throws CloneNotSupportedException.It is designed for use by sophisticated enum-based data structures, such as EnumSet and EnumMap.Its position in its enum declaration, starts from 0.Should use toString to return a more user-friendly name.The name of this enum constant, which is the identifier used to declare it.Protected Enum ( String name, int ordinal ) We can use = to compare enum constants effectively because constants are final and we cannot call an enum’s constructors to create more constants.By defining a finite set of values, the enum is more type safe than constant literal variables like String or int. When anything else other than constants is there, comma-separated constants should be terminated with a semicolon. The Java enum type provides a language-supported way to create and use constant values.We can add fields, constructors and methods to an enum. ![]() In plain English, “to enumerate” means to count off or name one by one from a list. Should use Enums any time you need to represent a fixed set of constantsĪn enum type (or enumerated type) is a type whose fields consist of a fixed set of constants. ![]() ![]() I would 1000% go back and want her to be out butler again. ![]() She went above and beyond to arrange for us to have the chef prepare food that really was an experience being in St.Lucia. Nerissa was our butler and from beginning to end was absolutely above expectations. We had an amazing honeymoon and thank the entire staff of Serenity for an amazing trip. We had breakfast in our suite daily and the selection was to die for definitely try the french toast. The whole staff at Serenity is warm and extremely attentive they truly want you to enjoy your experience (and you will)!. He even surprised us when we returned home from an excursion with a drawn bath with rose petals. He was attentive, kind, and truly made our honeymoon trip feel so special. McCarthy set us up with amazing excursions around the island and we had a blast on each one. ![]() Ethan warmly greeted us upon arrival and was able to assist us the days McCarthy was off. Our butler McCarthy was absolutely wonderful, as was our back-up butler that's right: back up butler, Ethan. Tracy and the rest of the housekeeping staff were awesome cleaning the room thoroughly every day and leaving really sweet notes on our door and greeting us with a different towel animal on our bed each day the woman is talented!. Our suite was very clean when we arrived and ready for us with a fully stocked fridge and a snack prepared for us in our room after a long trip. The grounds are immaculate, private and extremely conveniently located five minutes away from the airport. Barcelo Bavaro Palace All Inclusive Resort.Sanctuary at Grand Memories Santa Maria.Paradisus Princesa Del Mar Resort & Spa.Hotels near Maria Islands Nature Reserve. ![]() ![]() ![]() There are plenty of resources online to help create your Black History Month lesson plans. Teaching the historical significance of Black History Month, and engaging students in related learning activities throughout February is a great way to contextualize current affairs. Venngage has a whole range of timeline infographic templates that are easy to customize. You can either prepare your history timelines in advance or get the students to create their own history timeline as part of the lesson activity. When planning your history lesson, make sure you have all of your timelines sorted. A timeline infographic is a great way to teach historical events. For some students, mentally visualizing history can be difficult. Teaching history in an effective and engaging way relies on the teachers ability to bring the past back to life. Prepare for history lessons with a history timeline infographic Using common teaching resources such as timeline infographics, or imaginative play and learning are exciting ways to make your History lesson plans exciting. No matter if you’re teaching the near past or the ancient history, planning History lessons is essential for a successful session. Return to Table of Contents History lesson plans If you want to learn how to write an actional learning objective, check out this post on learning objective examples. Scheduling is a great skill to incorporate into any lesson plan. You can use a timer on your interactive whiteboard, or get students to time themselves. The English lesson plan example below measures out timings for each activity so you finish perfectly on time. Use your lesson plan to schedule each activity by the minuteĪny teacher will know the feeling of reaching the end of your material with 10 minutes left in the lesson.Īvoid running short (or running over!) in your lessons by planning down to the minute. Like you’ll see in the English lesson plan examples below, creating engaging activities to a strict time schedule is perfectly possible with enough planning. But they can also be complicated to teach, with many moving parts to any one lesson.Ĭreating an English lesson plan is the best way to keep track of all the learning strands and activities that are needed for learning success. Return to Table of Contents English lesson plans Adding a reflection section in your science lesson plan can be a great way to add notes about what worked and what didn’t within your lesson, for future reference. Whilst a lesson plan is a place to schedule your activities, it can also be a great document to refer back to when planning future sessions. Provide a space for reflection in your science lesson plan Creating a science lesson plan is important to ensure that all of the students are effectively learning whilst remaining engaged and safe.įollowing a template, like in the science lesson plan examples below, can help make sure that your science lessons run smoothly. Planning a science lesson can mean anything from experiments, to monitoring, or to diagramming and labelling. Otherwise, keep scrolling to see different lesson plan samples and ideas, with tips on how to write the best lesson plan you can as well as templates you can edit right away. ![]() If you want to learn how to write a lesson plan in general, check out this section. Some lesson plans also include additional sections for more thorough planning.Ī general format of a lesson plan can be like this : Lesson plans primarily include a schedule of activities that you will deliver in the lesson. ![]() Return to Table of Contents What is included in a lesson plan? ![]() You can also use a special platform Studoсu, that allows you to store all materials online in one place from any university. You can create your own lesson plan layout or pick a predesigned lesson plan template. Lesson plans are primarily documents that are printed, or saved as a PDF for a teacher to follow. It’s a list of tasks that your students will undertake, to help guide your teaching.Ī lesson plan is usually prepared in advance and can either cover a one-off activity, an entire lesson, a unit or course, a day, or a week. CREATE A LESSON PLAN Table of Contents (click to jump ahead):Ī lesson plan is a document that outlines the content of your lesson step-by-step. We’ve gathered together 28 of the best lesson plan examples on the internet that you can use to ensure your lessons are insightful and inspiring. Lesson plans also help keep you on track to ensure that your learners hit their goals and targets, in line with your course curriculum.īut sometimes in the high-pressure world of education, it can be difficult to find the time to create inspiring lesson plans on your own. Lesson plans are the best way to deliver an effective and engaging lesson. ![]() |
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