![]() The cathode and anode are housed inside a glass "tube" and contained within a vacuum. If you spin the anode, the electrons are spread out over the full 360, increasing the target area by a factor of 300 Lets assume the electrons cover an arc of 1.2 degrees on the anode. Think of it this way - have you ever put a pen on a spinning top (or wheel)? The tip of the pen is very small but you create one big line. This allows creates a larger target for the electrons. In modern x-ray tubes, the normal anode spins (very fast - around 3,500 rpm). The anode is a relatively flat (circular) disc that acts as the target for the stream of electrons that are emitted from the cathode. As a whole, the anode assembly is important as the source of the x-rays, as the primary conductor of heat out of the tube and as an integral part of the high voltage circuit. The anode assembly consists of the anode, the stator and the rotor. The anode assembly is the positive end of the x-ray tube. Essentially, the force that causes the electrons to repel each other is overpowered by the repulsive force of the focusing cup and the electrons tend to converge rather than diverge.ĭiscussion of the associated wiring is relatively questionable, except when discussing (a) focal spot size selection or (b) grid-biased (or grid-controlled or grid-pulsed) tubes. As this is counterproductive in x-ray tubes, the focusing cup is a negatively charged housing that "encourages" the electrons to stay together. Since negative repels negative, the electrons that have been emitted have a tendency to diverge. The filament emits electrons, all of which have a negative charge. ![]() The filament current is not quite the same as the mA that the radiographer controls, but they are related.įocusing CupThe focusing cup (made of Molybdenum) is a shallow depression in containing the filament. The amount of electrons that "break free" of the filament (or are emitted) is directly proportional to the amount of electrons flowing inside the filament (i.e., the current). When an electric current is passed through the filament, it heats up to such an extent that some of the electrons have enough (thermal vibrational) energy to break free of the attractive (electrostatic) forces holding them inside the filament. Most radiographers, when talking about the cathode, are actually talking about the filament.įilamentThe filament is actually a very tightly wound coil of wire. It is important to note that in radiography, the terms cathode and filament are generally interchangeable. It consists of the filament (or filaments), the focusing cup and all the associated wiring. The cathode is more correctly called the cathode assembly. The purpose of the cathode is to produce the thermionic cloud, conduct the high voltage current, and focus the emitted electrons (1). ![]() The cathode is the negative side of the x-ray tube. In any electric circuit, current flows from the negative side of a circuit to the positive side, and it is no different when an x-ray tube is involved. The negative end of the x-ray tube is called the cathode, and the positive end is called the anode. The x-ray tube consists of a cathode and an anode within a vacuum. The x-ray tube is essentially a massive valve, or switch, completing an electric circuit.
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![]() Step 5: Install SMS Backup & Restore on your Android phone. And then hit All Text Message on the popup dialog to convert the iPhone messages to Android supported format. Open the app, tap "Select iPhone SMS database" and locate to the SMS file. Go to Google’s Play Store, download and install iSMS2droid on your device. Step 4: Copy the file named 3d0d7e5fb2ce288813306e4d4636395e047a3d28 to your Android device via SD card or USB cable. On Mac, it saved in /(user)/Library/Application Support/Mobile Sync/Backup. On Windows, the default path is /Users/(Username)/AppData/Roaming/Apple Computer/Mobile Sync/Backup. Step 3: After it completed, find the backup folder on your computer. Step 2: Locate to the right side of the windows, select "This Computer" under the Backups area and click the "Back Up Now" button to create a backup for entire iPhone. Wait for it to detect your iPhone, click the "Device" icon at upper left corner and go to the "Summary" tab. Step 1: Connect your iPhone to your computer using the USB cable and start the latest iTunes. If you want to transfer SMS from iPhone to Android, the guide below could help you complete it. Part 2: Transfer SMS from iPhone to Android via SMS backup and restore You can also like reading: Transfer Data from iPhone to iPhone. One mistake could lead to the connection failed. Moreover, you should follow the procedure carefully. In another word, Move to iOS is not designed to sync files from Android to iOS in daily uses. First of all, it is only available when transferring data from Android to a new iPhone. But there are several factors you have to understand. Unlock your Android device, go to Google’s Play Store, search and download the "Move to iOS" app for free.Īs an Android to iPhone transferring application, Move to iOS is handy. Step 1: Connect both iPhone and Android device to the same Wi-Fi network. In addition to messages, Move to iOS app also supports contacts, photos, videos, and other data types. As its name said, this application is able to transfer SMS from Android to iPhone. Part 1: Transfer SMS from Android to iPhone via Move to iOSĪpple has caught up the multi-device trend and released an Android to iPhone transferring application called Move to iOS. Part 3: The best way to transfer data from iPhone to Android.Part 2: Transfer SMS from iPhone to Android via SMS backup and restore.Part 1: Transfer SMS from Android to iPhone via Move to iOS.Therefore, we are going to show you how to transfer messages from iPhone to Android or sync various data from Android to iPhone simply and quickly in this tutorial. On the other hand, a part of smartphone users have both an iPhone and an Android device to enjoy more benefits.īut the problem is that you cannot transfer content between iPhone and Android due to different operating system deigns. Though Apple continuously improves iPhone and introduces new features for iOS, many people decide to upgrade to Android phone, partly because they can get the same advanced technologies with lower cost. Until now, only one of the seven ships that went down in the June 1942 air and sea battle - five Japanese vessels and two American - had been located. "You see the damage these things took, and it's humbling to watch some of the video of these vessels because they're war graves." But when you see these wrecks on the bottom of the ocean and everything, you kind of get a feel for what the real price is for war," said Frank Thompson, a historian with the Naval History and Heritage Command in Washington, D.C., who is onboard the Petrel. "We read about the battles, we know what happened. The find comes after the discovery of another Japanese carrier, the Kaga, last week. "She's sitting upright on her keel, we can see the bow, we can see the stern clearly, you can see some of the gun emplacements on there, you can see that some of the flight deck is also torn up and missing so you can actually look right into where the flight deck would be," Kraft said. The vessel is sitting among a pile of debris and the ground around the warship was clearly disturbed by the impact of it hitting the seafloor. "I'm sure of what we're seeing here, the dimensions that we're able to derive from this image (are) conclusive," Kraft said. The first scan used low-resolution sonar, so the crew sent their AUV back to get higher-quality images. The vehicle had been out overnight collecting data, and the image of a warship appeared in the first set of readings Sunday morning. The researchers used an autonomous underwater vehicle, or AUV, equipped with sonar to find the ship. The Akagi was found in the Papahanaumokuakea Marine National Monument resting in nearly 18,000 feet (5,490 meters) of water more than 1,300 miles (2,090 kilometers) northwest of Pearl Harbor. Vulcan Inc.'s director of undersea operations Rob Kraft and Naval History and Heritage Command historian Frank Thompson reviewed high frequency sonar images of the warship Sunday and said that its dimensions and location mean it must be the carrier Akagi. ![]() We've been planning to locate the Lexington for about six months and it came together nicely," Kraft said in a statement.MIDWAY ATOLL, Northwestern Hawaiian Islands (AP) - A crew of deep-sea explorers and historians looking for lost World War II warships have found a second Japanese aircraft carrier that went down in the historic Battle of Midway. "Based on geography, time of year and other factors, I work with Paul Allen to determine what missions to pursue. "Lexington was on our priority list because she was one of the capital ships that was lost during WWII," said Robert Kraft, director of subsea operations for Allen. The search team said that 11 planes had been found including Douglas TBD-1 Devastators, Douglas SBD-3 Dauntlesses and Grumman F4F-3 Wildcats. The USS Lexington was carrying 35 aircraft when it went down. "We honor the valor and sacrifice of the 'Lady Lex's' Sailors - and all those Americans who fought in World War II - by continuing to secure the freedoms they won for all of us," he said. "As the son of a survivor of the USS Lexington, I offer my congratulations to Paul Allen and the expedition crew of Research Vessel (R/V) Petrel for locating the 'Lady Lex,' sunk nearly 76 years ago at the Battle of Coral Sea," Harris said in a statement. More than 200 members of the crew died in the battle but most were rescued by other US vessels before the Lexington sank.Īdmiral Harry Harris, who heads up the US military's Pacific Command (PACOM) - and whose father was one of the sailors evacuated - paid tribute to the successful research effort. The badly damaged Lexington, nicknamed "Lady Lex," was deliberately sunk by another US warship at the conclusion of the battle. ![]() The USS Lexington and another US aircraft carrier, the USS Yorktown, fought against three Japanese aircraft carriers from May 4-8, 1942 in the Battle of the Coral Sea, the first ever between carriers. The search team also released pictures and video of parts of the ship, including a name-plate, and anti-aircraft guns covered in decades of slime. On one aircraft, an emblem of the cartoon character Felix the Cat can be seen along with four miniature Japanese flags presumably depicting "kills." ![]() Remarkably preserved aircraft could be seen on the seabed bearing the five-pointed star insignia of the US Army Air Forces on their wings and fuselage. ![]() Whether you want to book the cheapest oil and filter change near you or care more about the garage’s reviews, we’ve got you covered. Always unfiltered and unedited for transparency.įilter Garages Your Way. See what like-minded drivers have to say about every garage on our comparison site to help inform your decision. Here are just some of the ways we keep you in control of your oil change near you: In fact, when you compare garages near you through our online comparison site, you can save up to 70% when you choose one of the lower-cost options!Īs one of the UK’s leading MOT and service comparison sites, we’re dedicated to helping drivers save money on their car maintenance. 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