This can occur close to resonance frequencies, for absorbing media, in plasmas, and for X-rays. The phase velocity is the speed at which the crests of the wave move and can be faster than the speed of light in vacuum, and thereby give a refractive index below 1. The refractive index measures the phase velocity of light, which does not carry information. Refractive index below unity Īccording to the theory of relativity, no information can travel faster than the speed of light in vacuum, but this does not mean that the refractive index cannot be less than 1. These properties are potentially important for applications in infrared optics. Moreover, topological insulators are transparent when they have nanoscale thickness. A type of new materials termed " topological insulators", was recently found which have high refractive index of up to 6 in the near to mid infrared frequency range. Germanium is transparent in the wavelength region from 2 to 14 μm and has a refractive index of about 4. įor infrared light refractive indices can be considerably higher. Most plastics have refractive indices in the range from 1.3 to 1.7, but some high-refractive-index polymers can have values as high as 1.76. Moissanite lies at the other end of the range with a refractive index as high as 2.65. Aerogel is a very low density solid that can be produced with refractive index in the range from 1.002 to 1.265. Almost all solids and liquids have refractive indices above 1.3, with aerogel as the clear exception. Gases at atmospheric pressure have refractive indices close to 1 because of their low density. These values are measured at the yellow doublet D-line of sodium, with a wavelength of 589 nanometers, as is conventionally done. A few examples are given in the adjacent table. PMMA (acrylic, plexiglas, lucite, perspex)įor visible light most transparent media have refractive indices between 1 and 2. Selected refractive indices at λ = 589 nm.įor references, see the extended List of refractive indices. Where the coefficients A and B are determined specifically for this form of the equation. The relative refractive index of an optical medium 2 with respect to another reference medium 1 ( n 21) is given by the ratio of speed of light in medium 1 to that in medium 2. Such lenses are generally more expensive to manufacture than conventional ones. įor lenses (such as eye glasses), a lens made from a high refractive index material will be thinner, and hence lighter, than a conventional lens with a lower refractive index. In this case, the speed of sound is used instead of that of light, and a reference medium other than vacuum must be chosen. It can also be applied to wave phenomena such as sound. The concept of refractive index applies across the full electromagnetic spectrum, from X-rays to radio waves. Nevertheless, refractive indices for materials are commonly reported using a single value for n, typically measured at 633 nm. For most materials the refractive index changes with wavelength by several percent across the visible spectrum. The imaginary part then handles the attenuation, while the real part accounts for refraction. Light propagation in absorbing materials can be described using a complex-valued refractive index. This effect can be observed in prisms and rainbows, and as chromatic aberration in lenses. This causes white light to split into constituent colors when refracted. The refractive index may vary with wavelength. This implies that vacuum has a refractive index of 1, and assumes that the frequency ( f = v/ λ) of the wave is not affected by the refractive index. The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/ n, and similarly the wavelength in that medium is λ = λ 0/ n, where λ 0 is the wavelength of that light in vacuum. The refractive indices also determine the amount of light that is reflected when reaching the interface, as well as the critical angle for total internal reflection, their intensity ( Fresnel's equations) and Brewster's angle. This is described by Snell's law of refraction, n 1 sin θ 1 = n 2 sin θ 2, where θ 1 and θ 2 are the angle of incidence and angle of refraction, respectively, of a ray crossing the interface between two media with refractive indices n 1 and n 2. The refractive index determines how much the path of light is bent, or refracted, when entering a material. In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. Ratio of the speed of light in vacuum to that in the medium A ray of light being refracted through a glass slab
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The most obvious anatomy diagram of the human body is the integumentary system, composed of the skin, hair, and nails. Since there are so many different systems and the human body is so complex, each anatomy diagram of the human body will be specialized by body system. What Kind of Anatomy Diagram of the Human Body Are You Looking for? Branches of microscopic anatomy include histology, which is the study of tissues, and cytology, which is the study of cells. Today our knowledge of microscopic anatomy is greatly improved thanks to modern technology such as the X-ray, ultrasound, and magnetic resonance imaging (MRI). Microscopic anatomy is the study of structures which can only be observed through a microscope. A muscle anatomy diagram of human body would be considered gross anatomy. Gross anatomy is less commonly referred to as topographical anatomy, regional anatomy, and anthropotomy. Gross anatomy or macroscopic anatomy is the study of structures that can be seen with the naked human eye without the aid of any special equipment. The Study of Anatomy Consists of Two Primary Types of Anatomy: 1. Anatomy is considered a branch of biology and medicine. Today, the term anatomy refers to the study of the structure of all living things. The word ‘ anatomy‘ is derived from the Greek language and literally means to separate apart to cut open and cut up. Over the past few thousand years, most of mankind’s knowledge of the human body has come from dissections and examinations of dead bodies of humans and animals. Before you can understand an anatomy diagram of the human body systems, it is important to know a little about what exactly anatomy is. Soft Curve Bob is the perfect summer style if you don’t like your hair to feel heavy at the bottom. Layered Inverted Bob flowing long bangs and layered A-line cut work together to create a unique and elevated look full of personality and poise. Most of the time you can wear it with your natural texture, or make it fancier when you have extra time. Angled Long Inverted Bob best thing about a blunt angled bob is how wearable and easy to style it is. With a classic cut like this, you can wear a fun color even if you need to look professional and polished. Medium Length Inverted Bob sleek, center-parted bob looks elegant in any color, so it provides lots of opportunity to play around. Asymmetrical Inverted Bob long inverted bob looks put-together and edgy at the same time, but there are even more styling options-change things up by wearing it straight or wavy. Curly Inverted Bob waves aren’t just for long hair! This short inverted pixie bob is playful and pretty, and the cut makes it easy to achieve incredible volume. Edgy Funky Inverted Bob contrast between the neat, polished inverted bob and the neon yellow color results in a striking, impactful look that will get you noticed. Stacked Inverted Bob short graduated bob works for thin and thick hair-it boosts volume at the crown and removes weight at the bottom, creating a balanced, flattering style. You can create a similar style with a large-barrel curling wand or a flat iron. Beachy Waves Inverted Bob waves and vibrant color make this textured lob look breezy and full of movement. Long Inverted Bob and sophisticated: this long inverted bob creates the perfect canvas for the gorgeous pearl blonde balayage. It’s a timeless look that never goes out of style. Short Inverted Bob With Bangs subtle stacking in the back and longer strands around the face, this graduated French bob is one of the most wearable variants of the inverted bob. Medium Inverted Bob luxurious, voluminous inverted asymmetrical bob is classy and elegant, but also edgy and visually striking, thanks to the asymmetrical outline and the petal-pink shade. You will discover how to use Flutter (and Dart) to create Android and IOS apps from scratch. – Traversy MediaĪ Youtube playlist on Flutter for beginners created by The Net Ninja. We will look at what Flutter is, how to get setup, built in widgets, stateless and stateful widgets, routing and more. In this crash course we will look at Flutter for building native mobile apps. – Flutter Course - Full Tutorial for Beginners (Build iOS and Android Apps)Ī Traversy Media crash course on Flutter. Nick has been a Flutter engineer since 2017 and has boiled down this real-world know-how into a clear-cut, realistic, and step-by-step crash course. In this course, Nick Manning from Flutter Crash Course teaches you how to get up and running with Flutter quickly and effectively. Learn Flutter, Google’s groundbreaking multi-platform mobile development framework, to create apps for Android and iOS. It is an excellent introduction and helps you understand the first concepts that will be useful for you. This tutorial was one of my references when I started Flutter.
Imagine trying to change a schema on the fly while there are users online. Dynamic changes to SQL can be time consuming and potentially dangerous. I've seen a similar application as the one I'm working on and the pipeline of SQL schema scripts and messing about is scary. It delivers a kind of flexibility and adaptability that allows us to do things which are essentially impossible to do with SQL databases. You can store arbitrary data easily and allow users to define what data they want to store at run time rather than design time. The door MongoDB opens is the ability to write applications that are not tightly coupled to the binary. If you are simply going to build applications like you did with SQL and expect it to be feature for feature identical you are missing the benefits. The who point of MongoDB is the flexibility. If you simply treat MongoDB as any other relational database and build applications tightly coupled with a schema it is like complaining that your trail bike doesn't go as fast as your Ferrari or carry as much as your pickup truck. However it became clear to me that using MongoDB directly would give me all the same features with far better performance. Later this technology adopted MongoDB under the covers. It actually used PostgereSQL under the covers, but it allowed huge flexibility that decoupled the code from schema. In 2013 I began working on a Automation Engine which used a data storage mechanism which was flexible. Where tight coupling between code and schema is acceptable. There are workloads where the data structures are mature and unchanging, where flexibility and adaptability isn't critically important. I was a dBase programmer back in the early ninties. I spent decades dealing with this kind of problem from even before SQL. Changing the data structure becomes almost impossible without management of both binary deployment and schema changes. You will build business rules into the domain objects. when you bind the data structure to the binary artifacts you cripple flexibility. The model is usually established by the SQL and object model, with a mapping using Hibernate or whatever other object relational mapper. In this statement there is the core weakness of orthodox software development, mainly that the foundation stone of our software is the model. The orthodox thinking is on clear display when Noah says "one of the most important parts of designing a system is fleshing out your data model". And to be frank some of the comments below indicate that using non SQL data storage is still considered heterodox. There was a time when the idea of using anything but a SQL database was heretical. Long time user of SQL of various varieties and PostgreSQL specifically. With Krisp, ibex will again raise the bar on creating amazing customer experiences for the world’s top brands.” “Krisp is a game-changer for agents and customers. It delivers exceptional audio clarity, reducing noise distractions and enabling better customer service. “We are delighted to partner with ibex and deploy Krisp as part of their Wave X platform,” said Davit Baghdasaryan, Co-founder and CEO of Krisp. Krisp's solution works across all audio hardware configurations and applications that support digital voice communication and is trusted by the world’s largest global call centers and service providers. Eliminating more than 75 billion minutes of noise per month, Krisp technology improves the productivity and efficiency of hundreds of thousands of agents and CX professionals worldwide. Krisp, the world’s first Voice Productivity AI software, improves voice communication by removing background noise, voice and echo from calls. For a regional healthcare provider, deploying Krisp helped our agents boost CSAT by 25 percent. In one case, implementing Krisp helped increase sales conversions by 16 percent and reduced AHT by 10 percent. Ibex has piloted Krisp in select accounts and the impact has been dramatic. At ibex, we firmly believe that combining the best technology with an award-winning employee experience and agent-first culture enables us to deliver the best CX for our clients at every customer interaction.” “We are excited to partner with Krisp to bring even greater value and service to our clients. “AI technology is changing the CX industry and empowering a better agent and customer experience,” said Jim Ferrato, Chief Information Officer at ibex. WASHINGTON, Ma(GLOBE NEWSWIRE) - ibex (NASDAQ: IBEX), a leading global provider of business process outsourcing (BPO) and customer engagement technology solutions, today announced it has partnered with Krisp to leverage Krisp’s cutting-edge AI-powered noise cancellation software for its onsite and remote agents to deliver a better customer experience.Īs part of ibex’s award-winning Wave X platform, Krisp’s AI software will reduce distracting background noise, which increases customer satisfaction (CSAT), decreases average handle time (AHT) and improves agent retention. This results in happier customers, improved CSAT scores and a significant boost in agent productivity and confidence-whether they're working from home or on-site.The partnership adds a cutting-edge AI-powered audio technology to ibex's award-winning Wave X platform. "As the only bi-directional noise cancellation solution in the market today, Krisp expertly removes background noise and maintains crystal clear voice quality for both ends of the line. "Krisp's AI-powered technology was specifically designed to enhance both the customer and agent experience," said Davit Baghdasaryan, CEO at Krisp. With 55% of Startek agents working remotely, this technology will empower agents to thrive while working at home. Startek will also leverage Krisp's technology to improve the experience for its 45,000 staff across the globe. By leveraging digital tools to support voice-based interactions, Startek delivers a superior voice-based experience to our client's customers." "Our partnership with Krisp further enhances our ability to listen and respond with empathy to the customer, even when the customer is in a busy environment. "At Startek we blend AI with live interactions to create the best possible experience for agents and customers alike," said Abhinandan Jain, Chief Digital Officer at Startek. Leveraging noise and echo-canceling technology from Krisp will enable Startek to create stronger connections and further enhance the experience delivered to customers across the globe. While digital solutions provide fast, 24/7 support, customers often prefer voice-based conversations in times of high emotional need. Startek leverages human-centric CX design to enable brands to deliver experiences by blending automated and live interactions. #contactcenterworld, CO, USA, and Mumbai, India, Startek(R) (NYSE: SRT), a global customer experience (CX) solutions provider, today announced that it has entered into a partnership with Krisp, an AI-powered noise cancellation solutions provider built to enhance the experience of customers and contact center agents by canceling background noise, resulting in clear conversations. LyX is released under a Free Software/Open Source license, runs on Linux/Unix, Windows, and Mac OS X, and is available in several languages. On screen, LyX looks like any word processor its printed output - or richly cross-referenced PDF, just as readily produced - looks like nothing else. No more endless tinkering with formatting details, “finger painting” font attributes or futzing around with page boundaries. LyX is for people who want their writing to look great, right out of the box. A broad array of ready, well-designed document layouts are built in. But you can also use LyX to create a letter or a novel or a theatre play or film script. In addition, staples of scientific authoring such as reference list and index creation come standard. This results in world-class support for creation of mathematical content (via a fully integrated equation editor) and structured documents like academic articles, theses, and books. LyX combines the power and flexibility of TeX/ LaTeX with the ease of use of a graphical interface. LaTeX Equation Generator Quality The application works using Aspose APIs, which are being used by many Fortune 100 companies across 114 countries.LyX is a document processor that encourages an approach to writing based on the structure of your documents ( WYSIWYM) and not simply their appearance ( WYSIWYG).No plugin or software installation is required. 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It really is Love, Actually! Richard Curtis 'secretly marries' partner Emma Freud after 33 year relationship and TWO failed proposals 'It's unbelievable, because whatever I do, people just assume it's true. I just pay it no nevermind and say, "Get out of my way."'ĭespite the fact that her father, Gérard Louis-Dreyfus, is a billionaire who runs the Louis Dreyfus Corporation, the actress stands apart from her wealthy family, insisting she is far from in the same league when it comes to her own personal wealth, contrary to reports. 'But I'm saying that I will deny its effort against me. 'There is sexism – I'm not denying its existence,' she says. While she may be one of the country's top comedic exports, Julia admits she's experienced her fair share of sexism during her illustrious career - which includes four Golden Globe nominations and one win, as well as 16 Emmy nods including four wins for her TV work alone. On Wednesday night in New York City, two longtime partners, who had been dating for four years, were seen out and about together and later had dinner with Louis-Dreyfus’ family.'It's way more realistic than House Of Cards': The star has been praised by an unnamed Senate aid, who tells the publication the show is more well-regarded than its counterpart, starring Kevin Spacey - seen here chatting with Julia at the White House Correspondents Association Dinner in Washington, DC last April But that wasn’t the only surprise of the night: earlier in the show comedian Kumail Nanjiani shared news that they have been dating. Louis-Dreyfus gave an emotional farewell and revealed she is pregnant in the final episode. From surreal to lewd put-downs – such as when she called Gary an “fucking jizzface” for using unreliable sources – to using them to criticize coworkers over incompetence, Louis-Dreyfus is never afraid to show it all off. One of Louis-Dreyfus’ many strengths on Veep is her unabashed displays of anger. Unfortunately, however, its payoff – where Mary Gross romances an accused stalker - failed to hit its target. Additionally, Louis-Dreyfus demonstrated her talent for impressions when she flawlessly rendered early MTV VJ Nina Blackwood with flair. This skit may have been too risque for SNL at the time, but Louis-Dreyfus proved she has what it takes to become a headliner with this sketch. While still perfecting Elaine Benes, Louis-Dreyfus already showed an aptitude for physical humor – this sketch where she attempted to sell eco-friendly cornstarch cutlery that dissolves in coffee was evidence of this fact. Louis-Dreyfus had just entered the acting world when she began hosting SNL in 1989. These 15 sketches reveal glimpses into her comedy career today. Louis-Dreyfus had an extensive run as SNL host before she found fame as Selina Meyer on Veep, and though not as adept a host as she is at acting, still managed to craft some unforgettable sketches ranging from early impressions to later satire. Her performances always leave audiences wanting more! However, acting is where Louis-Dreyfus truly shines making a career out of capturing complex yet engaging roles such as that of a hard-drinking office worker or playing off-kilter characters like brash divas like Bridget Jones and other characters from The Wire or Black Mirror series. Louis-Dreyfus is also an accomplished director, receiving critical acclaim for her work. Her performances have delighted generations while first breaking into comedy in Chicago’s Second City in the early ’80s as an improviser – since then becoming one of its stars and breaking barriers for female comedians alike. 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It’s very hard to back up your chat if you’re about to change your mobile number or buy a new smartphone. However, WhatsApp lacks some functionality offered by its major rivals. Smart replies, media sharing, broadcasting, and some other features also increase WhatsApp’s competitiveness. Moreover, It can fully replace Skype and Viber as it offers voice messages and video calls. The broadest reach is one of the app’s advantages. As of October 2018, WhatsApp is still the most popular Messaging app with 1.5B of monthly users. Nowadays, the app holds the strongest position, regardless of numerous rivals snapping at its heels. Being released at the beginning of 2009, it quickly became the choice of millions. When messaging apps were in their infancy, WhatsApp had almost monopolized the market. WhatsApp - a Pioneer in the Messaging Niche The chips are down, let’s make the final choice. Regardless of your initial intent, you’ve already selected two finalists and now sway between WhatsApp and Telegram. If you succeed, you might make your own website and start more comprehensive promotion. You can also give it a try as social media and messaging apps are free to use. Another step may be the creation of Telegram channel. Businesses often make an Instagram/Facebook page and promote their product via direct messages. In a case you are a startup owner, you may also utilize messengers to establish contact with your audience. |
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