![]() ![]() Although piezoelectric and magnetostrictive transducers later superseded the electrostatic transducers they used, this work influenced future designs. The British made early use of underwater listening devices called hydrophones, while the French physicist Paul Langevin, working with a Russian immigrant electrical engineer Constantin Chilowsky, worked on the development of active sound devices for detecting submarines in 1915. ĭuring World War I the need to detect submarines prompted more research into the use of sound. The ten Montreal-built British H-class submarines launched in 1915 were equipped with Fessenden oscillators. The " Fessenden oscillator", operated at about 500 Hz frequency, was unable to determine the bearing of the iceberg due to the 3-metre wavelength and the small dimension of the transducer's radiating face (less than 1⁄ 3 wavelength in diameter). In that test, Fessenden demonstrated depth sounding, underwater communications ( Morse code) and echo ranging (detecting an iceberg at a 2-mile (3.2 km) range). Revenue Cutter Miami on the Grand Banks off Newfoundland. ![]() The Canadian engineer Reginald Fessenden, while working for the Submarine Signal Company in Boston, Massachusetts, built an experimental system beginning in 1912, a system later tested in Boston Harbor, and finally in 1914 from the U.S. The world's first patent for an underwater echo-ranging device was filed at the British Patent Office by English meteorologist Lewis Fry Richardson a month after the sinking of Titanic, and a German physicist Alexander Behm obtained a patent for an echo sounder in 1913. The use of sound to "echo-locate" underwater in the same way as bats use sound for aerial navigation seems to have been prompted by the Titanic disaster of 1912. In the late 19th century, an underwater bell was used as an ancillary to lighthouses or lightships to provide warning of hazards. HistoryĪlthough some animals ( dolphins, bats, some shrews, and others) have used sound for communication and object detection for millions of years, use by humans in the water was initially recorded by Leonardo da Vinci in 1490: a tube inserted into the water was said to be used to detect vessels by placing an ear to the tube. Modern active sonar systems use an acoustic transducer to generate a sound wave which is reflected from target objects. It was developed during World War I to counter the growing threat of submarine warfare, with an operational passive sonar system in use by 1918. The first recorded use of the technique was in 1490 by Leonardo da Vinci, who used a tube inserted into the water to detect vessels by ear. The study of underwater sound is known as underwater acoustics or hydroacoustics. ![]() The acoustic frequencies used in sonar systems vary from very low ( infrasonic) to extremely high ( ultrasonic). The term sonar is also used for the equipment used to generate and receive the sound. Sonar may also be used for robot navigation, and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. Acoustic location in air was used before the introduction of radar. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. "Sonar" can refer to one of two types of technology: passive sonar means listening for the sound made by vessels active sonar means emitting pulses of sounds and listening for echoes. Sonar ( sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. Sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, which was shipwrecked on 3 December 1941 in the Gulf of Finland ![]()
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![]() Getting straight to the point right from the start shows the reader that you value their time. So, the reader knows right away that this email addresses the topic of content localization. Semrush’s newsletter in the above example starts with a statistical figure: “Did you know that only 20% of the world’s population speaks English?” After that, they jump right into the meat of their newsletter, without beating about the bush. It is a classic opening line that has since become boring. This is because the opening line, along with the subject line, gets visible before opening the email newsletter.įirst and foremost, avoid starting your newsletter with, “Hello, my name is…”. ![]() You need to create an amazing opening line, too. Writing a newsletter with an enticing subject line is not enough. You ask yourself, “What is expanding across nine countries and counting?” and open the email for the answer. Similarly, YourStory Buzz’s subject line in the above example makes you curious about the usage of the popcorn emojis. Flipkart’s subject line “Psst! Let’s make a plan together?” makes you want to ask them, “What plan?”, so you open the email to find out. Once these newsletters land in the reader’s inbox, the subject lines intrigue them enough to make them open the email.Īs you can see, both of the brands have used emojis in their subject lines to make them playful. It will tell the recipients that your newsletter contains useful content or breaking news that they should read straight away.įor instance, the subject lines that both Flipkart and YourStory Buzz use are bound to pique the readers’ interest. Try personalizing your subject lines by using the recipient’s name, if possible.Ī time-sensitive subject line, creating a sense of urgency, can also do the trick. A subject line such as “April 2022 Newsletter” will not give a reason to anyone to open your email. Only then can the newsletter bring conversions for your brand.įor that to happen, you need to craft a creative and enticing subject line for your newsletter. When you send out an email newsletter, you want the receivers to open it. They do not feature any PR stories or random events in that newsletter - centering the reader’s attention only on their blog posts.Ģ. Thrive, for example, offers a newsletter rounding up their most popular blog posts every few days or so. You should know how to write a newsletter focusing on a single specific topic. You cannot have one newsletter catering to every aspect of your brand, whether it be company updates, events, blog posts, or product launches. The last thing you want to do in your email marketing campaign is to send an unfocused and cluttered newsletter. Decide the Kind of Newsletter You Want to Send ![]() Take a look at these 9 tips for newsletter writing to get inspired: 1. We have added some examples of email newsletters from famous brands to help you better understand what it takes to write a good newsletter. How To Write A Newsletter Email Effectively It may include a list of your most popular content, promotions, news, tips, and announcements.Īs an email marketing tool, a newsletter can help you nurture your relationship with your customers and ultimately increase your blog traffic. Decide the kind of newsletter you want to sendĪ newsletter is an email delivering information about your brand to your prospects or your customers.To help you harness the power of email newsletter marketing, this blog post explains the following tips for writing a good newsletter : You should write your emails in a way to get your readers to open and respond to your emails. Simply sending out a newsletter only to meet your monthly or quarterly requirement will not make the cut. However, you need to learn how to write a newsletter email correctly, in order to get more conversions. ![]() Email newsletters are an effective mode of communication to market your products or services to your customers or prospects. ![]() ![]() ![]() ExpressVPN has a hidden service within the Tor network that guarantees extra security and anonymity. With a no-obligation spin, you can simply request a refund within 30 days and get your money back. Free Trial: 7-day free trial (Android and iOS devices)ĮxpressVPN is the best risk-free VPN for dark web because of its 30-day money-back policy and 7-day free trial for Android and iOS subscribers, and government-grade encryption policies – making it the most secure option to browse the dark web.Protocols: OpenVPN, L2TP/IPsec, PPTP, IKEv2.ExpressVPN: Best Dark Web VPN with Secure 30-Day Refund & 7-Day Trial Here are the 10 best free VPNs for dark web in 2022: 1. 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Having tested over 40 free VPNs for the dark web, we found that privacy concerns and data caps remain a recurring problem. If you go into the dark web without an extra layer of anonymity, you risk identifying details like your physical location. Even though enabled browsers like Tor protect you on the internet by encrypting your traffic and rerouting it to prevent government and ISP surveillance, you must use a VPN before dabbling in the internet’s dark side. You aren’t wrong to think that dark web browsers accomplish the same tasks as a VPN. Check out the best free VPNs that are competent to keep you anonymous while you are on the dark web! You just cannot risk losing your online identity on the dark web. ![]() ![]() ![]() If there is to be a cull, he said, “it needs to be a voluntary scheme. “Can the same be said for the transport industry, can the same be said for the aviation industry?” “We’re the one industry with a significant roadmap, and, to be quite honest with you, our herd isn’t any larger than it was 25 to 30 years ago,” he said. Egypt’s Military Retracts Plan to Extend Influence Over Constitution. Clashes Reported Even as Syria Urges Local Voting. Governments in the Arab world have violently dispersed demonstrations apparently inspired by or in solidarity with Egypts democracy protesters and have. ![]() The convulsions of the Arab Spring find new life as Yemen, Syria and Egypt struggle to transition to new forms of government. Pat McCormack, president of the Irish Creamery Milk Suppliers Association, said it was “frustrating” that the industry was being targeted. Arab World Uprisings: A Country-by-Country Look. “While there may well be some farmers who wish to exit the sector, we should all be focusing on providing a pathway for the next generation to get into farming”. “Reports like this only serve to further fuel the view that the government is working behind the scenes to undermine our dairy and livestock sectors,” he said. Tim Cullinan, president of the Irish Farmers’ Association, warned that beef and dairy production would simply shift to other countries if a limit was introduced in Ireland, undermining the attempted emissions savings. The Irish government says that no final policy decision has been taken and that any cull would be voluntary as part of a “retirement exit scheme” for farmers.īut some farmers fear it will not be possible to meet the targets with only a voluntary cull. One Irish politician described the plan as “absolute madness” and there are warnings that some farmers will refuse, and others will leave the sector, if an order is introduced. The isolation of the Hussein dynasty in the Arab world became conspicuous as a result of the civil war in Jordan in July, an attempted coup dtat in Morocco. Media reports last week suggested that one option being considered was to reduce the national dairy herd by 10 per cent – meaning a cull of 65,000 cows a year for three years, at a cost of €200 million (£170 million) annually. The Irish government wants to reduce emissions from farming by a quarter by 2030. The Arab Revolt ( Arabic:, al-Thawra al-‘Arabiyya) or the Great Arab Revolt ( Arabic:, al-Thawra al-‘Arabiyya al-Kubr) was a military uprising of Arab forces against the Ottoman Empire in the Middle Eastern theatre of World War I. It began in Tunisia in response to corruption and economic stagnation. ![]() Irish farmers are rebelling against a proposal to cull tens of thousands of cattle a year to help Ireland meet its climate change targets. Arab Spring The Arab Spring ( Arabic: ) was a series of anti-government protests, uprisings and armed rebellions that spread across much of the Arab world in the early 2010s. ![]() ![]() ![]() You should be able to remove the motor now. In case you’re curious, the white and black metal connectors represent positive and negative cables, respectively. ![]() Then do the same with the black metal wire connector. To remove the motor, you’d first have to remove its belt from the motor gear – which you can do by first sliding its belt to the extreme right using bare hands.Īfter removing the belt (the motor will be still intact), detach the white metal wire connector from the motor. Step # 6: remove its belt from the motor gear Once you have successfully removed it, you’ll be able to see the motor located on the top left side of the headshell of your Shark. You might have to pry in several locations to easily remove the plastic cover. Take the plastic casing tool and use it to remove the vacuum’s plastic cover by prying it up. Step # 5: motor located on the top left side of the headshell of your Shark Therefore, as long as you haven’t removed all the screws, you won’t be able to successfully remove the casing and reset the motor. The reason why you have to remove all these screws is that they’re keeping the vacuum’s plastic casing attached. The inside of the large wheels would also have two screws attaching them to the body. Unscrew them as well using a screwdriver. Once you can see them, use a screwdriver to remove both the 18mm screws.Īfterward, you could see four more 18mm screws located on the middle/bottom of the vacuum head and the top corners. ![]() Successful completion of the last step should reveal to you the screws hidden beneath the wheels. Repeat this procedure with the other wheel as well. To do that, insert the metal spudger in the front area of the wheel and slowly pry it up so that you can see the screw beneath it. Now, you have to remove the front wheels. Make sure that as you do that, the brush head should be facing towards the ceiling. Once you have detached the vacuum head from its body, flip it over. Press it to separate the vacuum’s body from its head. Once you’ve done that, you might be able to see a rubberish button located on the underside of the vacuum. You might have to forcefully pull the hose to detach it from the casing. Step # 1: unplugging the vacuumĪfter unplugging the vacuum, detach the hose which will be attached to its bottom. Got all the abovementioned tools in your custody? Then let’s kick things off. That’s where you’re going to need a plastic opening tool. Plastic opening tool: One of the below-mentioned steps involves opening the plastic casing of the vacuum.Screwdriver: First during the dissembling and later during the assembling back of the motor, you’ll need to loosen/tighten some screws.Metal Spudger: Since you’re going to separate plastic components during the process, a spudger – a wide tool which has a flat head – will come handy.Make sure you have them BEFORE you start resetting your Shark’s motor. There are some tools which you need to have before getting in on the motor replacement process. As you might guess, you cannot just open the body of your Shark and replace the vacuum with bare hands. ![]() ![]() ![]() These credentials are only stored locally and cannot be impersonated by anyone.īefore we talk about weaknesses, know that we will never abuse any weakness unless forced by a government entity.
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![]() Beau DeMayo has been tapped as executive producer and head writer. Yes, the beloved X-Men series is making a comeback! Marvel promises that it will be “an animated series that explores new stories in the iconic ‘90s timeline of the original series” but there will be a shake-up in leadership. The first episode of the second season will be “What If…Captain Carter Fought the Hydra Stomper?” so get ready for some heartbreak. Hela, Captain Carter, Scarlet Witch, Iron Man, Black Widow, Doctor Strange, Peter Parker, Thanos, the Grandmaster, Red Guardian, Ego, Shang-Chi, Winter Soldier, Captain America, and Gamora will all be helping or hindering the multiverse in season 2, and there will also be a 1602-inspired storyline in the mix. That being said, we’re happy to be proven wrong! What If…? Season 2īryan Andrews and AC Bradley return to shepherd in another season of wild animated MCU multiverse adventures in What If…? season 2. We’re going to provisionally list them here for the moment, but we’re pretty sure that the only two MCU TV shows that will arrive in 2023 are Secret Invasion, Echo, and Loki season 2, and that we’ll be waiting a bit longer for these others. So now, we’re getting to a group of projects that we initially expected in 2023, but will now likely to arrive in 2024. It’s gotta be better than Morbius, right? Anyone who says “it’s Kraven time” will be blocked and reported. ![]() Aaron Taylor-Johnson will star as Sergei Kravenoff. JC Chandor is directing from a screenplay by Matt Holloway, Art Marcum, and Richard Wenk. This time, it’s Kraven the Hunter, a character who had once been tapped to appear in Sony’s previous attempt to bring a Sinister Six movie to life (his spear appeared in that tease at the close of The Amazing Spider-Man 2), and who Jon Watts once considered as the villain for his third Spidey flick before No Way Home came together. ![]() In this case, another Spidey villain is getting his own movie. While technically not part of the MCU, things are always murky enough with these Sony Spider-Man projects that we figure it’s better safe than sorry when it comes to including them. Is this how we finally get SHIELD restored in the MCU? We sure hope so! Kraven the Hunter Now, there’s a man who knows a thing or two about shady deals and things not being quite what they seem! The events of this series will apparently also set up the Armor Wars movie (more on that down below). Robot vet Kyle Bradstreet is the head writer. ![]() On directing duties are Thomas Bezucha ( Let Him Go) and Ali Selim ( The Looming Tower) while Mr. Olivia Colman, Emilia Clarke, and Killian Scott also star. Kingsley Ben-Adir is playing the villain of the series. Jackson will return as Nick Fury alongside Ben Mendelsohn as his Skrull ally Talos for this series about the shape-shifting Skrull infiltration of Earth. Secret Invasion could be the biggest thing to happen to the MCU since Avengers: Endgame, although the trailer makes it feel much more like Captain America: The Winter Soldier in tone. ![]() ![]() ![]() When the COVID-19 pandemic hit, some people started to notice a common side effect when recovering from the virus: lingering brain fog. Whether it’s depression or hypothyroidism, getting these conditions under control with the right medications can help you think clearly once again.Do you ever notice that your ability to think feels sluggish or fuzzy? You might be experiencing what’s commonly known as “brain fog.” While not technically a medical or scientific term, it describes a temporary sensation of reduced mental acuity.īrain fog is likely as old as human intelligence, but the more recent emergence of burnout culture, which created legions of overworked achievers, brought awareness to the cognitive challenges that go with it. In large part, the treatment for brain fog depends on the cause. But your doctor would need to see other symptoms, besides brain fog, to suspect some of these. Other health conditionsĪ handful of other health conditions, including stroke, brain tumor, hypothyroidism, and some nutritional deficiencies, come with fuzzy thinking as a symptom. ![]() And you should feel focused again on the other side. ![]() But, as is the case with “baby brain,” brain fog in menopause is rarely noticeable to anyone but you. That suggests that hormone changes alone play a key part in mental sharpness, too. Sleep troubles and mood changes, including stress, anxiety, and depression, can certainly play a part, but some women who don’t have these complaints during menopause still have trouble thinking straight. What’s more, not only will you bounce back on the other side, but studies show that the female brain undergoes long-lasting positive changes during pregnancy that help prepare a woman for motherhood.Īt the end of the reproductive years, up to 60% of menopausal women report memory loss and other thinking difficulties during this transition. So don’t worry too much about what your boss and coworkers might think. Most research, however, shows that changes in thinking skills at this time are usually noticeable only to the pregnant woman herself. Stress, anxiety, and even depression can also accompany pregnancy and make it hard to think straight, too. Pregnant women often have trouble sleeping, which can kill your focus. ![]() Many women feel foggy during a couple of major life milestones: pregnancy and menopause. Ongoing heavy drinking can have a lasting impact on your brain and affect you even when you’re sober. And booze doesn’t just impair your ability to think when you’re under its influence. These worries can keep you up night after night, and sleep loss is yet another enemy of brain function.ĭepression, stress, and anxiety can drive a person to drink, too. When you’re anxious or under a lot of stress, it can be hard to focus on anything else but the cause of your stress. Most people have felt the effects of that at one point or another. With or without depression, stress and anxiety can cause brain changes that impact thinking skills, too. With treatment for depression, you can regain your focus and judgment.ĭepression, stress, and anxiety often come as a package deal. But your brain is what neuroscientists call “plastic.” That is, it can change-for the better, for the worse, and back to better again. Many of these changes happen in areas related to clear thinking and executive function. This may not be so surprising when you understand that depression causes physical changes in your brain that doctors can see on an MRI. “These are issues that we’ve seen a lot more since the onset of the pandemic,” Stewart says.Īs many as 60% of people with depression-that’s three in five of them – have cognitive problems, including slow response time and trouble with attention, planning, decision-making, reasoning, and multitasking. ![]() |