![]() Replace domain.tld with a valid domain name and admin with a valid userĪlso check that. The complete configuration file I use can be downloaded Now ejabberd should be installed, if everything went well it is time to createĪ jabber user and grant him admin ~]$ ejabberdctl register admin domain.tld ~]$ vi /usr/local/etc/ejabberd/ejabberd.yml configure -enable-user=ejabberd ejabberd-xxx]$ make & make install # where `ejabber` is the unpriviledged user that will run the ejabberd ejabberd-xxx]$. Install the required dependencies, compile and ~]$ tar -xvf ~]$ yum install gcc gcc-c++ expat-devel openssl-devel automake git libyaml ~]$ cd ejabberd-xxx Root) so the only viable option here is to compile from source. Should feel confortable with having an internet exposed service running as Installed this way I was not able to make it run as unpriviledged user (no one Installation and initial configurationĭownload and install erlang (release numbers here may not be up to ~]$ cd tmp]$ wget tmp]$ yum localinstall esl-erlang_17.1-1~centos~6_amd64.rpmĪlternatively add erlang-solutions repo ~]$ cd tmp]$ wget tmp]$ rpm -Uvh tmp]$ yum install esl-erlangĪs for ejabberd, ProcessOne also provides a few precompiled installers but when My blog also contains a bunch of other posts regarding ejabberd that are worth I strongly adviseĪny reader to read carefully what is written here and not just copy-and-paste Mantain an ejabberd server working efficiently and secure. I will be keeping this post up to date to keep track on how to configure and
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![]() Leveraging Zero Knowledge Encryption, CrossClave eliminates entire categories of cyberattacks, reducing the attack surface and the subsequent vulnerabilities attackers can exploit. A security-first alternative to existing SaaS-based file sharing tools, CrossClave gives users absolute confidence in the safety and integrity of their most sensitive data across trusted and untrusted networks alike. SpiderOak’s CrossClave solution is a fully secure modern productivity suite designed from the ground up to meet the information security needs of the Federal government. The world is a safer place when its data is secure.” However, doing so securely is the challenge. The urgency of this situation compresses the due diligence runway of deploying such capabilities from miles to feet. "Public and private organizations are rapidly expanding their use of remote communication and collaboration capabilities. "SpiderOak’s security value proposition could not be more relevant to the Federal mission space than it is right now, and I can think of no better partner than Carahsoft to expand our reach to these potential clients,” said Mike Campanelli, Federal VP at SpiderOak Mission Systems. Under the agreement, Carahsoft will serve as SpiderOak’s Master Government Aggregator™, making the company’s secure communications solutions available through Carahsoft’s NASA Solutions for Enterprise-Wide Procurement (SEWP) V contracts and reseller partners. WASHINGTON, DC and RESTON, VA – J– SpiderOak Mission Systems, providers of cryptographically secure communication and collaboration products, today announced a strategic partnership with Carahsoft Technology Corp., The Trusted Government IT Solutions Provider ®, to accelerate awareness and availability of its Zero Knowledge Encryption/Distributed Ledger-based capabilities to Federal agencies and the intelligence community. Partnership will provide agencies with cryptographically hardened communications capabilities for secure communications in even the most hostile and contested environments This article was originally published by Via Satellite.SpiderOak Mission Systems Partners with Carahsoft to Provide Secure Communication and Collaboration Solutions to Federal Government Air Force Small Business Innovation Research (SBIR) contract is a great example of how the government and both large and small companies can work together,” said Joe Epstein, SBIR portfolio manager for Lockheed Martin Space. ![]() Lockheed Martin is always looking for innovative companies who can contribute increased capabilities and greater security to these important government missions. “Relentless cyber security is critical for our customers and ensures that their national security and intelligence missions are robust and resilient. Space Force systems, and to subject the system to a rigorous assessment. SpiderOak said in a March 4 announcement that the Small Business Innovation Research (SBIR) contract will provide initial funding for research to integrate OrbitSecure into Air Force and U.S. Air Force small business contract to adapt its OrbitSecure protocol to military use last year. This follows after SpiderOak received a U.S. The companies said they have a commission vision for satellite operators “in which zero-trust principles and next-level encryption ensure these customers have the greatest and most secure access to satellite data possible.” In turn, SpiderOak will work to adapt the commercial technology to new uses for potential military and intelligence community satellite operators. Lockheed Martin’s Space Mission Solutions business plans to support integrating OrbitSecure technology into practical satellite management. OrbitSecure is a software solution for ground and space platforms to secure all data types over untrusted infrastructure, including both unencrypted networks and commercial operators. The companies announced an agreement on Tuesday to field key components of the SpiderOak OrbitSecure platform. To develop and test a zero-trust cybersecurity platform for the space data supply chain. ![]() Can I copy text from Kindle Cloud Reader? or you can also use the kindle mobile app. Simply visit the Kindle Cloud Reader website and sign in to access your books. Yes, Kindle Cloud Reader is available on both Android and iOS devices through the web browser. Can I use Kindle Cloud Reader on my phone or tablet? You’ll need to sign in with your Amazon account to access your books. To access Kindle Cloud Reader, you’ll need to use the Google Chrome web browser and visit the Kindle Cloud Reader website. ![]() Bookmark a page: If you want to save your place in a book and come back to it later, you can bookmark the page by tapping the “Bookmark” icon in the top right corner of the screen.įAQs 1.Adjust the font size: To make the text in Kindle Cloud Reader easier to read, you can adjust the font size by tapping the “Aa” icon in the top right corner of the screen and selecting a larger or smaller font size.Here are a few tips and tricks to help you get the most out of Kindle Cloud Reader: You can now paste this text anywhere you want using the usual paste method.Īlso Read:- How To Set A Different Residential Address for Your Digital Purchases Tips and tricks Step 6: When you tap the “Copy” button, a message will appear in the bottom right corner of your screen that says “Text copied to clipboard”. Once you have selected the desired text, click the “Copy” button. Step 5: In the Google Lens section on the right side of the screen, select the text that you want to copy. In Google Lens, click on the “Text” option. Step 4: After selecting the text, Google Lens will open up on the right side of your screen. There has been no update on their conditions. Two of the Log Flume riders were taken to a local hospital for evaluation, Fitzgerald said. ![]() One of the boats became tipped at an angle, but did not overturn, she said. Other waterpark mishaps: Popular Mountain Creek water slide engulfed in flames days before park opening More Six Flags: Jersey Devil Coaster opening at Six Flags Great Adventure ![]() On Sunday, Fitzgerald said, "Our First Aid staff assisted several guests who were in a Log Flume boat that did not complete its cycle." Tammori Petty, spokeswoman for the state Department of Community Affairs, said the department's Carnival and Amusement Ride Safety Unit is investigating the incident. "The ride is currently undergoing a thorough inspection by our safety and engineering teams and will remain closed until further notice." "The safety of our guests and team members is always our highest priority," Fitzgerald said. Six Flags spokeswoman Kristin Fitzgerald did not directly respond to a question about the railing. Original story: NJ Six Flags log flume ride malfunctions, injuring two riders It's unclear if that dislodged railing played into the mishap. People at the scene of the mishap appear calm in the video, with Six Flags staff tending to some of the riders of the log flume boat that was tilted on its side at the end of the run.īut Brown's video also shows a broken side railing on the water-filled chute of the ride. "I took the video because I thought people should be aware," he said. ![]() With his 4K pocket camera in hand, he decided to film the aftermath of the incident. He had that, but he also stumbled upon the scene of a mishap with the Saw Mill Log Flume ride. JACKSON - Noel Brown went to Six Flags Great Adventure Sunday for a day of fun. Watch Video: Couple travels 3 hours to catch solar eclipse at Barnegat Light ![]() Go to Device Manager (right click on My Computer, choose Manage and then find Device Manager in the left panel) 2. In order to manually update your driver, follow the steps below (the next steps): 1. The package provides the installation files for Lenovo PM Device Driver version 1.67.10.15. Lenovo PM Device Driver 1.67.10.15 for Windows 10 This program is language independent and can be used with any language system. If this package has been installed, updating (overwrite-installing) this package will fix problems, add new functions, or expand functions as noted below. This package installs the software (Power management driver) to enable power management on Lenovo computers. Lenovo Power Management Driver 1.67.10.20 for Windows 10 The package provides the installation files for Lenovo Application Interface Driver version 1.0.0.8. Lenovo Application Interface Driver 1.0.0.8 for Windows 10 64-bit Key Features: - Processor: 5th Generation Intel Core i5-5200U (2.2GHz, cache 3MB) - Memory: 8GB, DDR3, 1600Mhz - Display: 13.3" HD (1366x768), LED, anti-glare - Video: Intel HD Graphics 4400 - Storage: 256GB, SATA SSD - Optical storage: None - Card reader: 2in1 card reader. Lenovo ThinkPad E31-80 Energy Management Driver 1.5.0.14 for Windows 10 64-bit Go to Device Manager (right click on My Computer, choose Manage and then find Device Manager in the left. The package provides the installation files for Lenovo System Interface Foundation Device Driver version. Lenovo System Interface Foundation Device Driver. Go to Device Manager (right click on My Computer, choose Manage and then find Device Manager in the left panel). The package provides the installation files for Lenovo USB Receiver (HID) Driver version 1.9.0.9. Windows 10 Lenovo Power Management Driver 1.67.10.20 for Windows 10 related drivers Lenovo USB Receiver (HID) Driver 1.9.0.9 for Windows 10 64-bit Also don’t forget to constantly check our website so that you don’t miss any new releases. If this software is developed for your device, click the download button, get the package, and apply this version. Also, after the installation has completed, do perform a reboot to make sure all changes take effect properly. It’s not unlikely that other platforms be suitable with this version as well, but we advise against you installing this release on OSes other than the specified ones. Afterwards, run the available setup and follow the displayed instructions. To apply the current release, make sure the package is compatible with your system characteristics, get the downloadable package, and extract it if necessary. Install this software and your system will be able to make use of various power management features, as well as adjust different power settings.īy updating the software version, you may benefit from an improvement of numerous screen-related functions, a fix for different errors encountered throughout the unit’s usage, but also from added newly-developed features, enhanced power saving ability, and several other changes. Added support for ThinkPad Yoga 14, ThinkPad Yoga 460, ThinkPad S3 About Power Management Software: Added support for ThinkPad E460, E465, E560, E565 Added support for ThinkPad Yoga 260(Black:WW), ThinkPad Yoga 260(Silver : NA), ThinkPad S1(Silver: China) Added support for ThinkPad 10 (Machine types: 20E3, 20E4) in. Added support for ThinkPad X1 Yoga (Machine types: 20FQ, 20FR) Lenovo Power Management Driver 1.67.10.20 for Windows 10 - Description ![]() To determine the winners, we used the following criteria: Best iPhone Management Software: What to Consider Most of the paid apps have a free trial version, so you can download and test them yourself. So, if you want to manage your iPhone more effectively, you’ll definitely benefit from using iPhone transfer software. Whether you were using iTunes to listen to music or to keep your files and data synchronized with your computer, there are a number of options to choose from. In fact, there are plenty of iOS-friendly apps that can replace or even surpass iTunes. Others want to transfer music to their iPhones more quickly. Many Mac users are looking for easy-to-use alternatives for organizing photos, or for copying messages & call history from their phone to a computer. It also limited the number of file formats you can upload and is unable to save several backups. iTunes often came under criticism because it’s slow, especially on Windows, and for a lack of interesting features. While iTunes was considered to be the classic program for managing iPhone data, there were a lot of users who aren’t comfortable with it. None of them actually know that we are putting together this review before we post it here on SoftwareHow. No software developers or merchants mentioned in this post have any influence on our testing process, nor do they get any editorial input in the content. I hope that my review will help you choose a program that works best for you, enabling you to manage and transfer your music, movies, TV shows, books, notes, messages, contacts, and apps in a more straightforward way.ĭisclaimer: The opinions in this review are all our own. Our goal is to examine all popular iPhone managers available and help you find the best software that you can rely on to improve your data transferring experience. My teammate JP is on a MacBook Pro and has some experience using iPhone transfer software as well, so he will share some of his opinions as well. For this article, I tested these iOS content managers mainly on my Windows-based laptop. But just like you, I’m still just a regular user who prefers simple and intuitive interfaces that run smoothly.įor work, entertainment, and communication, I use a Samsung computer (Windows) and an iPhone. Today, I’m taking my first tiny steps at coding. Since my childhood, I have been interested in the innovation and development of new technologies. For more than six years, I’ve been writing on a range of subjects, from marketing to IT. I’m a writer who happens to be a tech enthusiast. Best iPhone Manager: The Paid Competition.Best iPhone Transfer Software: The Winners.Best iPhone Management Software: What to Consider.We also cover a list of other tools including several free iPhone managers. Read on to find out more details about the winners. EaseUS offers fewer features than the other applications, but it provides effective data management services for free while other apps have trial limitations. ![]() Besides fulfilling data management needs, AnyTrans can also transfer files across iOS and Android phones, PC/Mac, and cloud storage services, increasing connection and functionality among your devices.ĮaseUS MobiMover comes in handy when you need to transfer data to/from your computer or share files between iOS devices. It’s developed by iMobie, a company that specializes in creating solutions for Apple, Android, and Cloud users. iMazing is also helpful for exporting and printing iPhone text messages. Additionally, DigiDNA, the maker of iMazing, offers SoftwareHow readers an exclusive 20% discount and you can claim the offer here.ĪnyTrans is another powerful and effective iPhone manager. It allows you to quickly copy all content from your old device to a new one. IMazing is our top recommendation for those who need a trustworthy and user-friendly program to transfer, save, and back up files and data. Here’s a quick summary of this long roundup review: ITunes is gone, what’s the best alternative to manage your iPhone data? After carefully testing 15 iPhone transfer software on our PC and Mac, we found some great ones that can level up your data management experience and provide some additional features iTunes doesn’t offer. ![]() It comes with support for different image formats with various view modes and slideshow settings to choose from. The app provides EXIF information, which, as you would know, can prove to be handy at times when you want to know more information about an image. Besides being a regular image viewer app, it also offers different functionalities like resizing, cropping, retouching, management, and comparison, to name a few. Besides, you also get basic editing options such as convert, resize, rotate, along with a few batch image operations.įor those looking for an image viewer that is fast, user-friendly, and offers a range of features, FastStone is the app for you. ![]() Moreover, you also get different view types and the option to bookmark.Īmong other things, HoneyView offers you the ability to view the EXIF data for images, which can help you learn more about an image. It supports a wide range of image formats, including various RAW image formats, and also provides slideshow with different settings to choose from. For starters, the interface is fairly simple and clean, with basic controls available right up front. HoneyView takes a simplistic approach compared to some of the other image viewer apps in this article, making it more like an alternative to the Microsoft Photo Viewer. Moreover, you also get dedicated settings for different features, which you can change to have a personalized experience. Furthermore, the developer claims the app to offer support for over 500 image formats, which is quite impressive. You get a range of different image viewing modes such as thumbnail, full screen, filmstrip, etc just like ImageGlass, alongside the ability to perform a range of different operations like crop, resize, apply filters, change brightness/contrast, and more.Īmong other things, XnView also provides you metadata support, the ability to perform batch operations, and create slideshows and thumbnail galleries. Besides being a mere image viewer, the app also offers you the option to browse and convert images on your Windows machine. If you are looking for an image viewer that offers a one-stop solution for different image-operation needs, XnView offers you just that. The app comes with different view options, along with the option to view image properties and run slideshows, with different customizing options. What’s more, ImageGlass offers quick thumbnail preview, slideshow, image conversion into 10 different formats, and gives you the option to change different app settings as per your liking. For instance, you get auto-zoom, scale to fit, scale to fill, etc as some of the zoom modes, and window fit, frameless, fullscreen, and slideshow, as different window modes. It claims to support over 70 different image formats (including GIF) and provides various zoom and window modes. The app offers a clean and lightweight interface that loads instantly and is fairly easy-to-use. Being open-source means that, in addition to using the app as it is, you also get to enjoy the benefits of being able to modify it as per your requirements. ImageGlass is one of the open-source image viewer apps for Windows. ![]() ![]() The player holding the lowest club leads the first trick (this can be altered by a rule option). This pattern can be changed by a rule option.Īfter everyone has passed, the cards passed to you are displayed in your hand. Who you pass to rotates between (1) your left, (2) your right, (3) across, and (4) no-pass. Passįollowing the deal, each player chooses 3 cards from their hand to pass to another player. With 6 players, the deck omits the 2 of Diamonds, 2 and 3 of Clubs, and the 2 of Spades. With 5 players, the 2 of Diamonds and 2 of Clubs are omitted. When played with 3 players, the 2 of Diamonds is omitted from the deck, resulting in 51 cards. The entire deck is dealt giving each of the four players 13 cards. Hearts is played with a standard 52-card deck, 2 through Ace of each suit. A player may “shoot the moon” by taking all 26 points in a hand, giving other players 26 points instead (see Scoring, below).Ī game is over when one or more players get to 100 points. ![]() Each hand consists of 26 points, one for each Heart and 13 for the Queen of Spades (♠Q). The game is suited for people of all ages who like Hearts or card games.Hearts is an easy-to-play trick-taking game where players compete for the fewest points.The winner of the game is whoever has the lowest score when the game ends.The game ends when any player has 100 or more points.If you score all points on a round you can decide if you would prefer to subtract 26 points from your total score or add 26 points to all of your competitors.Each Heart is worth a point & the Queen of Spades is worth 13 points.If you get stuck eating the Queen of Spades you already scored half the points, so if nobody else has scored any points yet it may make sense to see if you can shoot the moon.If a suit has been laid many times be careful with casually taking a trick where someone else may throw the Queen of Spades on it.Avoid taking tricks and the deal unless you have low Spades to lead back, have a high Spade you are discarding last, or you are trying to shoot the moon.In general you want to get rid of your highest cards you can without winning tricks, or get rid of high Spades if you are throwing last.The objective of the game is to not score points.The Queen of Spades is worth 13 points.Players do not score points for winning tricks, but score points if any Hearts or the Queen of Spades are thrown on a trick they win.Players must follow the suit led if they have it in their hand.Hearts are considered broken if a player has previously thrown a Heart on another trick.Hearts may not be led until the suit is broken or the player leading a Heart has nothing but Hearts in their hand.After the first hand the Queen of Spades can be thrown any time.If a player does not have any Clubs they may not throw the Queen of Spades or a Heart on the first trick.Players must follow suit if they have a card of the suit led in their hand. ![]() The game starts with a player throwing the 2 of Clubs.Try to avoid having large runs of cards near the upper limit of any suit unless you also have many low ranked cards in that suit or are trying to shoot the moon.If you can pass cards to limit yourself to holding 3 or fewer suits then when the fourth suit is thrown you can lay off Hearts or a Queen of Spades on it if you have it.In general it is typically best to pass the King or Ace of Spades unless you have many low Spades in your hand or are considering shooting the moon.This rotation repeats until the game ends.First you pass 3 cards left, next you pass 3 cards right, on the final pass you pass to the player sitting across from you and on the fourth round there is no pass.The game works on a 4 cycle passing rotation across hands.Near each player it states how many points they had scored in the current round & how many they had scored in the game so far exclusive of the current round.The game has a pause button in the upper left corner, a full screen mode button in the lower left corner, and buttons for game sound and music controls in the upper right corner.Tap the screen with your finger to select cards.Use your mouse left click button to select cards to pass or to select cards to play.In the lower left corner of the welcome screen there is a language select dropdown & in the lower right corner there are buttons for social sharing and reading game developer information.The welcome screen also has buttons for game help, high scores, and more games.Select the golden Play button on the welcome screen to start the game.Have the lowest score when any player reaches 100 or more points to win. Avoid winning tricks with a Heart or the Queen of Spades on them, unless you can shoot the moon & take all tricks. ![]() Our other apps work on Retina Macs, but do not use the high resolution. Note: TransType 4 and FontLab Pad were our first apps that support the Mac Retina resolutions natively. If you're on Mac OS X and using Mac OS X 10.7 or newer, please read this note carefully. Mac OS X 10.10 (Yosemite) and later created some minor issues for FontLab Studio, which were addressed in version 5.1.5. (Windows versions of FontLab products are not affected by this in any way.) We considered discontinuing these applications, as they do not sell enough units to justify new versions, but as there are no alternatives available on Mac OS, we continue to make the WINE-wrapped versions available as an imperfect but useful workaround. Buying ScanFont or BitFonter "for Mac" means getting the Windows version with the WINE wrapper in a single installer. For ScanFont and BitFonter, we have provided a workaround by packaging the Windows application in a WINE wrapper that allows it to run on Mac OS X. This affected a number of applications available from Fontlab Ltd.: some older FontLab applications do not work on 10.7 or later operating systems. Recent versions of Mac OS X (since 10.7 Lion in 2011) no longer support PowerPC-based Mac applications. Note about Mac OS X 10.7-10.11 compatibility And best of all, it?s a free update for all users of FontLab Studio 5.0.x. Creation of OpenType fonts has been improved with Adobe FDK for OpenType version 2.5. ![]() It allows creating fonts with up to 65,535 glyphs, which is 10x the previous version's limit. It's up to 2.5 faster than version 5.0.4, and much more stable. March 2013 FontLab Studio 5.1.4 for Mac OS X 10.7-10.10 is the newest version of our high-end font editor. Introducing FontLab Studio 5.1 for Mac OS X Free upgrade for all Windows users of FontLab Studio 5 and AsiaFont Studio. Introducing FontLab Studio 5.2 for WindowsĪpril 2013 FontLab Studio 5.2.1 for Windows with new features (create OpenType fonts with up to 65,535 glyphs, improved OpenType generation through FEA syntax 2.5, interpolated nodes, OpenType Layout features in Metrics Window, class kerning overlay preview, new Change Weight and Clean Up Paths operations, MM glyph blend preview, canvas notes, Python 2.7, improved user interface) and hundreds of bugfixes. Apply cool special effects to your fonts.ĭownload free 7-day trial for Mac and Windows or buy now at US$97 (upgrades just US$39.95). Create multi-color OpenType fonts from layered fonts or BitFonter Photofont files. Fix and reorganize family naming problems automatically and through drag-and-drop. Convert virtually any font (including VFB and UFO) into modern OpenType PS (.otf)/TT (.ttf) fonts and web fonts. Introducing TransType 4 for Mac OS X and Windowsĭecember 2013 TransType 4 for Mac and Windows, an easyĪpplication to convert, fix, organize and customize fonts. One of the most famous hot spring spas is in the appropriately named town of Bath, England. In the third century BCE, scholars and leaders warmed themselves in a hot spring fed by a stone pool near Lishan, a mountain in central China. Archaeological evidence shows that 10,000 years ago, groups of Native Americans gathered around naturally occurring hot springs to recuperate or take refuge from conflict. People have long used this type of geothermal energy for engineering, comfort, healing, and cooking. Low-temperature energy is most efficient when used for heating, although it can sometimes be used to generate electricity. Low-temperature geothermal energy can be used for heating greenhouses, homes, fisheries, and industrial processes. Most pockets of low-temperature geothermal energy are found just a few meters below ground. Low-temperature geothermal energy is obtained from pockets of heat about 150° C (302° F). This heat energy is called low-temperature geothermal energy. Harvesting Geothermal Energy: Heating and Cooling Low-Temperature Geothermal Energy Almost anywhere in the world, geothermal heat can be accessed and used immediately as a source of heat. Other countries, such as the U.S., must drill for geothermal energy at greater cost. In Iceland, abundant sources of hot, easily accessible underground water make it possible for most people to rely on geothermal sources as a safe, dependable, and inexpensive source of energy. Different types of geothermal energy are available in different parts of the world. Many countries have developed methods of tapping into geothermal energy. This dry geothermal heat can be accessed by drilling, and enhanced with injected water to create steam. It remains in the mantle, emanating outward at a slow pace and collecting as pockets of high heat. Most of the Earth’s geothermal energy does not bubble out as magma, water, or steam. Geothermal energy can be used to heat structures such as buildings, parking lots, and sidewalks. ![]() Their heat can be captured and used directly for heat, or their steam can be used to generate electricity. These are all sources of geothermal energy. Hot water can be released through geysers, hot springs, steam vents, underwater hydrothermal vents, and mud pots. Magma heats nearby rocks and underground aquifers. Magma exists in the mantle and lower crust, and sometimes bubbles to the surface as lava. ![]() If underground rock formations are heated to about 700-1,300° C (1,300-2,400° F), they can become magma. Magma is molten (partly melted) rock permeated by gas and gas bubbles. In most parts of the world, the geothermal gradient is about 25° C per 1 kilometer of depth (1° F per 77 feet of depth). This gradual change in temperature is known as the geothermal gradient. Earth’s temperature rises with depth from the surface to the core. Heat from the core is constantly radiating outward and warming rocks, water, gas, and other geological material. Temperatures there rise to more than 5,000° Celsius (about 9,000° Fahrenheit). Radioactive decay is a continual process in the core. Potassium-40 most often decays to isotopes of calcium (calcium-40) and argon (argon-40). As potassium-40 decays, its nucleus changes, emitting enormous amounts of energy (radiation). Potassium, for instance, has 20 neutrons in its nucleus. ![]() Isotopes are forms of an element that have a different number of neutrons than regular versions of the element’s atom. However, the vast majority of Earth’s heat is constantly generated by the decay of radioactive isotopes, such as potassium-40 and thorium-232. A small portion of the core’s heat comes from the friction and gravitational pull formed when Earth was created more than 4 billion years ago. ![]() About 2,900 kilometers (1,800 miles) below the Earth’s crust, or surface, is the hottest part of our planet: the core. ( Geo means “earth,” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use. Geothermal energy is heat that is generated within the Earth. |
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