Lightshipis in the Augmented Reality Industry

Lightship

Lasers by Hal Hellman, is part of the HackerNoon Books Series. You can jump to any chapter in this book . LIGHT AND THE ATOM here LIGHT AND THE ATOM Since light waves have such high frequencies, a different mode of generation comes into play. We can no longer count on the controlled movement of free electrons atoms and molecules. Rather, light and all the radiations in the higher frequencies are generated by the movement of electrons atoms and molecules. outside inside Let us review momentarily the modern, albeit highly simplified, conception of an atom. Remember that no one has yet seen one. We describe the atom on the basis of how it acts, as well as how it reacts to things scientists do to it. For the present purpose, the best model we have of the atom is that of a miniature solar system, with a nucleus or heavy part at the center and a cloud of electrons dashing around the nucleus in fixed orbits. The term “fixed orbits” is used advisedly. Our planet moves in a certain orbit around the sun. If we attached a large enough rocket to the earth we theoretically move it closer to or farther away from the sun. In the atom, we have learned, this cannot be done. An electron can only exist in one of a certain number of fixed orbits; different kinds of atoms have different numbers of orbits. could We might think in terms of an elevator that can only stop at the various floors of an apartment building. Each upper floor is like an orbit of the electron. But you get nothing for nothing in the world of physics, and just as it takes energy to raise an elevator to a higher floor, it takes energy to move an electron to an outer orbit. Hence the atom is said to be raised to higher levels when an electron is nudged to an outer orbit. The energy input can be of many different kinds. Examples are heat, pressure, electrical current, chemical energy, and various forms of electromagnetic radiation. If too much energy is put into the elevator it goes flying out the roof. If too much energy is put into the atom, one or more of its electrons will go flying out of the atom. This is called , and the atom, now minus one of its negative electrons and therefore positively charged, is called a positive . energy ionization ion But if the amount of energy is put into the atom, one of its electrons will merely be raised to a higher energy level. Shown in , for instance, are the ground state (Circle No. 1) and two possible higher energy levels. As you can see there are three possible transitions. right Figure 9 Figure 9 Schematic representation of the electron orbits and energy levels of an atom. Each circle represents a separate possible orbit and each arrow a possible energy level difference. The higher energy levels are abnormal, or excited, states, however, and the electron will shortly fall back to its normal (ground state) orbit (assuming some other electron has not fallen into it first). In order for the electron to do this (go back to its normal orbit), it must give off the energy it has acquired. This it does in the form of electromagnetic radiation. The energy difference between the two levels will determine what kind of radiation is emitted, for there is a direct correlation between energy and frequency. If the energy difference between the two levels is such that the frequency of emitted radiation is roughly between 10¹⁴ and 10¹⁵ cycles per second, we see the radiation as light. When more energy is added, the radiation emerges as ultraviolet or X rays. In other words the higher the energy difference, the higher the frequency, and vice versa. Thus it is that cosmic rays, with the highest frequencies known to man, can pass right through us as if we weren’t there. This simple picture of energy levels and associated frequencies doesn’t quite hold for ordinary white light, however. Such light is generally produced by a process called incandescence, which results from the heating of a material until it glows. True, the atoms of the incandescent material are being raised to higher energy levels by chemical energy (as in fire), electricity (light bulb), or nuclear energy (the sun). In a hot solid, however, the explanation becomes more complicated. Many different electronic configurations are possible and the differences in energy among the various levels (which can be many more than the three shown in ) vary only slightly from one another. The result is a wide band of radiation. Figure 9 Thus, while the incandescent electric bulb is a great advance over fire, it is still a very inefficient source of light. Because it depends upon incandescence, a considerable portion of the electrical input goes into the production of unwanted heat, for the bulb’s filament radiates in the infrared as well as the visible region. For providing illumination, the fluorescent tube is far more efficient than the incandescent lamp: a 40-watt fluorescent tube gives as much light as a 150-watt incandescent light. This is because its radiation is more controlled, operating more in accord with our description of electronic energy levels. Hence more of its output is in the desired visual region of the spectrum. In certain types of lighting, particular energy level changes may predominate, leading to the characteristic colors of neon tubes and vapor lamps. Although the resulting radiation bandwidth is narrow enough in these devices to appear as a definite color instead of the broad spectrum we know as white, it is still quite broad. In other words, the radiation is still frequency incoherent—and it is still spatially incoherent. To understand this, let us return for a moment to the group of radio antennas we showed in . All of them, you will recall, could be made to radiate in phase. In the production of light, however, each antenna is replaced by a single atom! Figure 8 This creates two problems. First, because the energy stored in the atom is quite small, it comes out not as a continuous wave but as a tiny packet of radiation—a . It has an effect more like the hack of an ax than the buzz of a power saw. photon Second, atoms are notoriously “individualistic”. When a batch of atoms in a material has been raised to higher energy levels there is no way to know in what order, or in what direction, they will release their energy. This kind of process is called , since each atom “makes up its own mind”. All we know is that within a certain period of time—a short period, to be sure—a certain percentage of these higher energy atoms will release their photons. spontaneous emission Figure 10 Ordinary light is a jumble of frequencies, directions, and phases. What we have, then, is incoherent radiation—a jumble of frequencies (or colors), directions, and phases. Such light, symbolized in , works well enough in lighting up this page, but is almost worthless as a carrier of information (and in other ways, as we shall see shortly). About the best that can be done with it is to turn it on and off in a sort of visual Morse code, which is exactly what is done on the blinker communication systems sometimes used for ship-to-ship communication. Figure 10 In other words, ordinary light cannot be modulated as radio waves can. It is of interest to note, however, that ordinary white light be made coherent, to some extent, but at a very high cost in the intensity of the light. For example, we might first pass the light through a series of filters, each of which would subtract some portion of the spectrum, until only the desired wavelength came through. As can be seen in , only a small fraction of the original light would be left. can Figure 11 Figure 11 Obtaining coherent radiation the hard way. Filters and pinhole block all but a small amount of the original radiation. Incoherent Filters Coherent in time Pinhole Coherent in time and space We would then have monochromatic (one color) light, which is temporally coherent radiation, but it would still be spatially incoherent. In our diagram, we show three monochromatic waves. If we then passed this light through a tiny pinhole as shown, most of these few remaining waves would be blocked; the ones that got through would be pretty much in step. (In a similar manner, a true point source of light would produce spatially coherent radiation; but, as in the process described here, there wouldn’t be very much of it.) We have, finally, obtained coherent light. The important thing about the laser is that, by its very nature, it produces coherent light automatically. Now.... About HackerNoon Book Series: We bring you the most important technical, scientific, and insightful public domain books. This book is part of the public domain. Hal Hellman (2021). Laser. Urbana, Illinois: Project Gutenberg. Retrieved October 2022 https://www.gutenberg.org/cache/epub/65512/pg65512-images.html This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at , located at . www.gutenberg.org https://www.gutenberg.org/policy/license.html

LIGHT AND THE ATOM

Twenty Thousand Leagues under the Sea by Jules Verne, is part of the HackerNoon Books Series. You can jump to any chapter in this book . I FORM MY RESOLUTION here CHAPTER III: I FORM MY RESOLUTION Three seconds before the arrival of J. B. Hobson’s letter, I no more thought of pursuing the unicorn than of attempting the passage of the North Sea. Three seconds after reading the letter of the honourable Secretary of Marine, I felt that my true vocation, the sole end of my life, was to chase this disturbing monster, and purge it from the world. But I had just returned from a fatiguing journey, weary and longing for repose. I aspired to nothing more than again seeing my country, my friends, my little lodging by the Jardin des Plantes, my dear and precious collections. But nothing could keep me back! I forgot all—fatigue, friends and collections—and accepted without hesitation the offer of the American Government. “Besides,” thought I, “all roads lead back to Europe (for my particular benefit), and I will not hurry me towards the coast of France. This worthy animal may allow itself to be caught in the seas of Europe (for my particular benefit), and I will not bring back less than half a yard of his ivory halberd to the Museum of Natural History.” But in the meanwhile I must seek this narwhal in the North Pacific Ocean, which, to return to France, was taking the road to the antipodes. “Conseil,” I called in an impatient voice. Conseil was my servant, a true, devoted Flemish boy, who had accompanied me in all my travels. I liked him, and he returned the liking well. He was phlegmatic by nature, regular from principle, zealous from habit, evincing little disturbance at the different surprises of life, very quick with his hands, and apt at any service required of him; and, despite his name, never giving advice—even when asked for it. Conseil had followed me for the last ten years wherever science led. Never once did he complain of the length or fatigue of a journey, never make an objection to pack his portmanteau for whatever country it might be, or however far away, whether China or Congo. Besides all this, he had good health, which defied all sickness, and solid muscles, but no nerves; good morals are understood. This boy was thirty years old, and his age to that of his master as fifteen to twenty. May I be excused for saying that I was forty years old? But Conseil had one fault: he was ceremonious to a degree, and would never speak to me but in the third person, which was sometimes provoking. “Conseil,” said I again, beginning with feverish hands to make preparations for my departure. Certainly I was sure of this devoted boy. As a rule, I never asked him if it were convenient for him or not to follow me in my travels; but this time the expedition in question might be prolonged, and the enterprise might be hazardous in pursuit of an animal capable of sinking a frigate as easily as a nutshell. Here there was matter for reflection even to the most impassive man in the world. What would Conseil say? “Conseil,” I called a third time. Conseil appeared. “Did you call, sir?” said he, entering. “Yes, my boy; make preparations for me and yourself too. We leave in two hours.” “As you please, sir,” replied Conseil, quietly. “Not an instant to lose;—lock in my trunk all travelling utensils, coats, shirts, and stockings—without counting, as many as you can, and make haste.” “And your collections, sir?” observed Conseil. “We will think of them by and by.” “What! the archiotherium, the hyracotherium, the oreodons, the cheropotamus, and the other skins?” “They will keep them at the hotel.” “And your live Babiroussa, sir?” “They will feed it during our absence; besides, I will give orders to forward our menagerie to France.” “We are not returning to Paris, then?” said Conseil. “Oh! certainly,” I answered, evasively, “by making a curve.” “Will the curve please you, sir?” “Oh! it will be nothing; not quite so direct a road, that is all. We take our passage in the .” Abraham Lincoln “As you think proper, sir,” coolly replied Conseil. “You see, my friend, it has to do with the monster—the famous narwhal. We are going to purge it from the seas. The author of a work in quarto in two volumes, on the ‘Mysteries of the Great Submarine Grounds’ cannot forbear embarking with Commander Farragut. A glorious mission, but a dangerous one! We cannot tell where we may go; these animals can be very capricious. But we will go whether or no; we have got a captain who is pretty wide-awake.” I opened a credit account for Babiroussa, and, Conseil following, I jumped into a cab. Our luggage was transported to the deck of the frigate immediately. I hastened on board and asked for Commander Farragut. One of the sailors conducted me to the poop, where I found myself in the presence of a good-looking officer, who held out his hand to me. “Monsieur Pierre Aronnax?” said he. “Himself,” replied I; “Commander Farragut?” “You are welcome, Professor; your cabin is ready for you.” I bowed, and desired to be conducted to the cabin destined for me. The had been well chosen and equipped for her new destination. She was a frigate of great speed, fitted with high-pressure engines which admitted a pressure of seven atmospheres. Under this the attained the mean speed of nearly eighteen knots and a third an hour—a considerable speed, but, nevertheless, insufficient to grapple with this gigantic cetacean. Abraham Lincoln Abraham Lincoln The interior arrangements of the frigate corresponded to its nautical qualities. I was well satisfied with my cabin, which was in the after part, opening upon the gunroom. “We shall be well off here,” said I to Conseil. “As well, by your honour’s leave, as a hermit-crab in the shell of a whelk,” said Conseil. I left Conseil to stow our trunks conveniently away, and remounted the poop in order to survey the preparations for departure. At that moment Commander Farragut was ordering the last moorings to be cast loose which held the to the pier of Brooklyn. So in a quarter of an hour, perhaps less, the frigate would have sailed without me. I should have missed this extraordinary, supernatural, and incredible expedition, the recital of which may well meet with some scepticism. Abraham Lincoln But Commander Farragut would not lose a day nor an hour in scouring the seas in which the animal had been sighted. He sent for the engineer. “Is the steam full on?” asked he. “Yes, sir,” replied the engineer. “Go ahead,” cried Commander Farragut. The quay of Brooklyn, and all that part of New York bordering on the East River, was crowded with spectators. Three cheers burst successively from five hundred thousand throats; thousands of handkerchiefs were waved above the heads of the compact mass, saluting the , until she reached the waters of the Hudson, at the point of that elongated peninsula which forms the town of New York. Then the frigate, following the coast of New Jersey along the right bank of the beautiful river, covered with villas, passed between the forts, which saluted her with their heaviest guns. The answered by hoisting the American colours three times, whose thirty-nine stars shone resplendent from the mizzen-peak; then modifying its speed to take the narrow channel marked by buoys placed in the inner bay formed by Sandy Hook Point, it coasted the long sandy beach, where some thousands of spectators gave it one final cheer. The escort of boats and tenders still followed the frigate, and did not leave her until they came abreast of the lightship, whose two lights marked the entrance of New York Channel. Abraham Lincoln Abraham Lincoln Six bells struck, the pilot got into his boat, and rejoined the little schooner which was waiting under our lee, the fires were made up, the screw beat the waves more rapidly, the frigate skirted the low yellow coast of Long Island; and at eight bells, after having lost sight in the north-west of the lights of Fire Island, she ran at full steam on to the dark waters of the Atlantic. About HackerNoon Book Series: We bring you the most important technical, scientific, and insightful public domain books. This book is part of the public domain. Jules Verne (1994). Twenty Thousand Leagues under the Sea. Urbana, Illinois: Project Gutenberg. Retrieved October 2022 https://www.gutenberg.org/files/164/164-h/164-h.htm This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at , located at . www.gutenberg.org https://www.gutenberg.org/policy/license.html

I FORM MY RESOLUTION

ARTIFICIAL LIGHT IN WARFARE

It was during the morning of July 6, 2137

Ever just be in the right place at the right time? After a successful LinkedIn event in Cincinnati, I was catching up over coffee with . Anisha Bailey became the forefront of conversation.  As we discussed further, we  wondered, is this local event or is it happening across the nation? Only Cincinnati? Why? After this and other such questions, I quickly secured a press pass to see this for myself. Black Tech Week And I’m glad that I did.  Walking in to the iconic Music Hall of downtown Cincinnati, it was sort of like a black SXSW wonderland.  And a clear showcase of what black excellence can be. and have been helping the region blossom in more ways than one. In addition to founding , they purchased the Black Tech Week event and brought it to Cincinnati. According to Brian, attendance reached an impressive 2,000 conference goers. In his words: “I have to say, Black Tech Week was well beyond even our team’s expectations. The energy was palpable. People are still telling me, 2 weeks later, how they met their CTO, COO, new investors, and tribe.” Candice Matthews Brackeen Brian Brackeen Lightship Foundation Tulsa Representation It was wonderful to see a significant black tech contingent representing Tulsa, Oklahoma, given how Tulsa had been home to a prosperous black community known as Black Wall Street some generations ago. (For those of you unfamiliar with the story, may be helpful.) this resource What's inspiring is that my new friend Tyrance Billingsley II, the Founder and Executive Director of , is on his way to rebuilding Black Wall Street as a tech innovation hub. Black Tech Street I had the pleasure of speaking with Tyrance about the event. In his words: “I have been to Black Tech Week before, but this one was my favorite. Being able to meet with tons of Black Innovators and Founders from across the country in a city as beautiful as Cincinnati was a special experience. I got a ton of new perspectives on my work and how I can leverage the Black Tech Week platform to support the Black Tech movement nationally!” The Greater Cincinnati / Louisville Representation Being a long time resident of Louisville prior to moving to the Queen City of Cincinnati, it was like a tech family reunion, getting to see such friends particularly who recently came out of stealth, with Captain raising $104 million, , and of Kare Mobile. Demetrius Gray Kela Ivonye Dr. Kwane Watson Dr. Watson commented: “It is an honor to be among so many amazing entrepreneurs, it is refreshing to hear their stories and learn from their experiences.  Black Tech Week exceeded my expectations, and I look forward to attending them in the future!” Going full circle, I reached back out to Anisha Bailey for her perspective on how the event transpired: "Black Tech Week brought to Cincinnati the kind of excellence and opportunities that can help black and brown communities reimagine what's possible. A relatively small subset of the African diaspora descended upon Cincinnati with the kind of energy that infuses confidence and collaboration within our naturally ambitious and innovative culture, and I am proud to have been a part of such an incredible experience. I am excited to see the growth in attendance next year, with more of our local students and professionals having an opportunity to be inspired into the kind of action that enhances our collective growth within Cincinnati and beyond."

Recap: Black Tech Week's Smashing Success in Cincinnati

Enhancing Cross-Chain Communication The goal of Photon is to solve the issues that are caused by interoperability by enabling decentralized apps (dApps) to communicate with one another in a seamless way across many blockchains. This is true independent of whether or not the blockchains in question are based on Ethereum Virtual Machine (EVM) architectures. This objective is accomplished by the company via the provision of high-speed communications services that connect more than 15 blockchains. Furthermore, the company has aspirations to grow this network even further in the year to come. Introduction to Photon's Cross-Chain Messaging A new breakthrough is likely to make it simpler for decentralized applications (dApps) to communicate with one another across various blockchain networks. This is due to the fact that blockchain technology is always experiencing advancements. Recent experiments have shown that the Photon cross-chain message that Entangle is developing, which will be made available along with the mainnet of Entangle, is the most efficient signaling protocol in the Web3 environment. The company's innovative approach to cross-chain communications was what made this significant improvement in communication possible. It is a new feature known as "transmitter Agents" that is at the heart of the Photon protocol's ability to minimize the amount of time it takes for blocks to be created and to make the transaction process move more smoothly. The Need for Speed and Efficiency There are a plethora of independent networks that make up the world of blockchain technology. Each of these networks operates under its own set of restrictions. The concept that the value of a smart contract is directly proportional to the degree of its communication capabilities is the philosophical foundation upon which Photon's design philosophy is founded. It is very necessary to have effective communication throughout the various chains in order to make full advantage of the potential offered by Web3 technologies. Enhanced user experiences and more decentralized application capabilities will be made possible as a result of this occurrence. Technical Insights The Transmitter Agent framework is responsible for the technological foundations of Photon's high-speed messaging. This framework makes use of a distributed network of agents to identify and propose cross-chain communications in a proactive manner. Through collaborative efforts, these agents are able to reach an agreement on the authenticity of messages, which enables them to swiftly finish transactions that include many chains. In order to maintain a flexible infrastructure that can accommodate the ever-changing nature of blockchain activities, Photon has implemented lightweight off-chain components and decreased the amount of time it takes for blocks to be generated. Furthermore, developers are granted the liberty to design their own unique consensus thresholds, which further optimizes the validation process in order to enable complicated processes and provide a wide range of functionality. Photon's strategy for ensuring fast and reliable transfers is predicated on the optimized design of the Transmitter Agents, which are strategically distributed to facilitate rapid event capture and proposal submission. This design choice allows for quicker consensus among Transmitter Agents and timely execution of cross-chain messages. Overview of Entangle With the goal of creating a data infrastructure that is entirely adaptive and interoperable, Entangle is a larger project that wants to attract both Web3 applications and existing organizations. The instant supply of photon is not the only thing that this effort does. Entangle's goal is to provide blockchain-based applications and ecosystems communication channels for smart contracts that are not only cost-effective but also secure, interoperable, and allow quick transmission. This will be accomplished via the use of Photon as the company's flagship protocol. There are a wide range of real-world data sources that might potentially be affected by such a data solution. These include, but are not limited to, financial markets, digital asset exchanges, sports, gaming, and a great lot of other examples. Through the provision of developers with the capacity to access and interact with a broad variety of permitted data, Entangle is marketing itself as a supplier of complete data solutions in the Web3 area. Entangle is making this effort as part of its overall strategy to strengthen its position in the industry. Conclusion Photon offers fast speeds, freedom, and security, which will help Web3 dApps reach more people and work better. Photon wants to speed up the creation of a blockchain network environment that is more connected and flexible. Entangle wants to make cross-chain DeFi easier and better for all users. This shows that it is committed to making decentralized technology better and easier to use. Adding these kinds of unique rules will change blockchain and the digital market as it grows. Don’t forget to like and share the story! Vested Interest Disclosure: This author is an independent contributor publishing via our brand-as-author program. Be it through direct compensation, media partnerships, or networking, the author has a vested interest in the company/ies mentioned in this story. HackerNoon has reviewed the report for quality, but the claims herein belong to the author. #DYOR

Cross-Chain Communication Hits Lightspeed with Entangle's Photon

Introduction: In the realm of modern retail, a point-of-sale (POS) system is the beating heart of any business. It manages sales, inventory, customer interactions, and more. Two prominent contenders in the POS arena are the Lightspeed R-Series POS and VendHQ ( ). Lightspeed X Series POS Each offers a unique set of features designed to enhance the retail experience. In this in-depth comparison, we’ll explore the strengths and nuances of both systems to help you make an informed decision for your business. Lightspeed R-Series POS: Elevating Retail Management The Lightspeed R Series POS is a testament to innovation and adaptability in the retail sector. Engineered with cutting-edge technology, this system offers a plethora of tools to streamline operations and optimize customer interactions. Seamless Inventory Management: The R-Series POS excels in inventory management, allowing you to monitor stock levels, set up alerts for low inventory, and even reorder products seamlessly. The system’s intelligent analytics provide insights into sales trends, enabling you to make informed restocking decisions. Customer-Centric Features: With the R-Series, you can build robust customer profiles that include purchase history, preferences, and contact information. This enables personalized interactions and targeted marketing campaigns, fostering customer loyalty and satisfaction. Versatile Payment Options: The R-Series supports multiple payment methods, including credit/debit cards, mobile wallets, and contactless payments. This flexibility enhances the shopping experience and caters to a wide range of customer preferences. VendHQ (Lightspeed X-Series) POS: Simplicity and Scalability VendHQ, part of the Lightspeed X Series, is a cloud-based POS solution that emphasizes user-friendliness and scalability. Designed for businesses of all sizes, it empowers retailers to manage their operations efficiently. Cloud-Based Convenience: VendHQ’s cloud-based architecture ensures that your data is accessible from anywhere with an internet connection. This feature is especially beneficial for multi-location businesses or those with an online presence. Intuitive Interface: The X-Series POS prides itself on its user-friendly interface, making it easy for staff to learn and use the system effectively. Minimal training is required, enabling a smooth onboarding process for new employees. Add-On Integrations: VendHQ offers an array of integrations with third-party applications such as accounting software, e-commerce platforms, and CRM systems. This ecosystem allows you to tailor the POS system to your specific business needs. You can also use third-party applications like SKUPlugs to integrate the POS systems with marketplaces. SKUPlugs provides integration for both platforms with major e-commerce platforms like Shopify, Woocommerce, Bigcommerce, Wix, Magento, Squarespace, Amazon, Walmart, and Farfetch etc. Conclusion: Choosing the Right POS for Your Business Selecting between the and VendHQ (Lightspeed X-Series) POS hinges on your business requirements and priorities. The R-Series excels in robust inventory management and customer engagement, making it ideal for businesses seeking a comprehensive solution. Lightspeed R-Series POS On the other hand, VendHQ’s cloud-based simplicity and scalability cater to businesses aiming for a streamlined yet adaptable POS system. Both systems reflect Lightspeed’s commitment to innovation and customer satisfaction. Ultimately, your choice should align with your business goals, size, and operations. Whichever you choose, embracing the power of a Lightspeed POS system can undoubtedly elevate your retail management game, leading to enhanced customer experiences and operational efficiency. - Original Source Lightspeed R-Series Vs X-Series Comparison

Lightspeed R-Series POS Vs. VendHQ (Lightspeed X-Series) POS: What to Know About Each

POS Lightspeed Serie R vs. POS VendHQ (Lightspeed X-Series): una comparación completa

Lightspeed R-Series POS vs. VendHQ (Lightspeed X-Series) POS : une comparaison complète

लाइटस्पीड आर-सीरीज़ पीओएस बनाम। वेंडएचक्यू (लाइटस्पीड एक्स-सीरीज़) पीओएस: एक व्यापक तुलना

Lightspeed R シリーズ POS との比較VendHQ (Lightspeed X シリーズ) POS: 包括的な比較

POS Lightspeed Série R vs. VendHQ (Lightspeed X-Series) POS: uma comparação abrangente

Lightspeed R-Series POS Vs. VendHQ (Lightspeed X-Series) POS: So sánh toàn diện

Lightspeed R 系列 POS 对比VendHQ（Lightspeed X 系列）POS：综合比较

People want to get their websites or applications up and running as quickly as possible. With Amazon Lightsail, we are able to deploy our web server, install & configure Git, clone our GitHub repo, and enable our web services with less than 2 minutes of work. Don’t believe me? Check this out! First, what is Amazon Lightsail? Amazon Lightsail is an easy-to-use service that provides Virtual Private Servers (VPS) with CPU, Memory, Storage, and Data Transfer Allowances at a predictable monthly price, with the cheapest being $3.50/month! Another benefit of Lightsail is that you can choose either a bare Operating System or an application blueprint to help you get up and running faster. Some application blueprints offered include: WordPress, PrestaShop, GhostCMS, Adobe Magento, LAMP stack, MEAN stack, etc. Let’s Do this in less than 2 minutes! First, we head into the Amazon Lightsail ( ) and choose our blueprint. I chose Amazon Linux 2. https://www.amazonlightsail.com Next, and this part is what saves us a LOT of time, we’ll use a Launch Script. This is a run-once script that will be executed after Lightsail deploys your instance. In this case with Amazon Linux 2 we use the following script: sudo yum update -y
sudo yum install -y git
sudo yum install -y httpd.x86_64
sudo systemctl start httpd.service
sudo systemctl enable httpd.service

git clone https://github.com/lightsail-demo-environment/dimension-public

sudo mv ./dimension-public/* /var/www/html/ This script updates the packages library, installs Git, installs apache, starts the apache service, adds it to run on startup in case our instance is rebooted, clones my website repo, and then moves the files into my web directory. If your GitHub repo is private, You’ll need to authenticate to your private repo in the CLI to clone the files. Will create a post about that another day. We then choose an instance size. As you saw in the first image under ‘What is Amazon Lightsail’ you’ll notice that Lightsail has 7 different instance sizes. Depending on the needs of your site, you can choose the corresponding instance size. (You can always upgrade to a bigger size later if needed). Give your instance a name and add any tags you’d like. Tags are meant to help identify workloads depending on your needs. Click ‘Create Instance’ Your Website will begin deploying. Once it’s deployed you’ll see that it is ‘Running’ and has an IP address. This is not a static IP, but a static IP can easily be attached in the next (optional) step (Optional) Add a Static IP to your website If you want to add a static IP, Lightsail makes it easy to generate the IP and attach it to your instance. Once you click on your instance, click the ‘Networking’ tab Click ‘Attach static IP’ Click ‘Create Static IP’ Give your static IP a name, then click ‘Create’ Your static IP is now created and assigned to your instance. We can then copy-and-paste the IP address into our browser and see that our website is up and running. FREEBIE As I said in the title, there is a freebie here too if this is your first time trying Amazon Lightsail. Head on over and sign up to use the service and get your first 3-months free (if you choose one of the associated instance types). Let me know what you think!

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-- employees

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lightship.dev

-- employees

Since n.d.

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LIGHTSHIP

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