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Wearing two face masks, or double masking, can substantially reduce a person’s exposure to coronavirus particles, according to a new study by the Centers for Disease Control and Prevention. The CDC report is a first of its kind from the agency, specifically addressing mask-wearing techniques and their efficacies. The CDC ultimately recommends two ways to improve how well face masks can protect you:To get more news about medical mask stock, you can visit tnkme.com official website.
When two people both exercise either of the above approaches, exposure to viral particles between them is reduced by upwards of 95 percent — more than double as efficient as the 42-to-44-percent efficiency the CDC saw from single surgical masks and single cloth masks.
As scientists and doctors identify new Covid-19 variants across the world and in the U.S., some Americans have been asking new questions about wearing face masks, notably whether they should double mask. In a recent interview with NBC’s “TODAY” show, Anthony Fauci, MD, director of the National Institute of Allergy and Infectious Diseases, said that when it comes to wearing two masks to protect against the coronavirus, it "makes common sense" that more than one layer of masking would be more effective. We consulted medical experts about double masking and how to approach doing so.
On top of the CDC's new findings and subsequent guidance regarding double masks, interest in the practice had been steadily growing for some time. Jess Steier, DrPH, co-founder and CEO of healthcare data analytics company Vital Statistics Consulting, told us questions about double masking had been circulating lately given news about Covid-19 variants popping up across the world, including in the U.S. Andrea Love, PhD, a regional manager for Nexcelom Bioscience, added another potentially motivating factor for the interest: Although there is early evidence to suggest that the Covid-19 variants are more transmissible, it's still unclear how they will affect how the virus behaves. Love co-hosts the topical Unbiased Science Podcast with Steier.
While scientists and doctors don’t have exact answers yet, more highly transmissible variants may mean contracting the virus after shorter periods of exposure, for one thing. Thus, Love said the mitigation measures we take need to be more stringent, especially in regards to wearing face masks since they act as a “physical barrier to block these respiratory droplets.”
“Masks are not 100-percent effective, so you’re going to stop some droplets but not others,” explained Love. “If we’re trying to increase the number of droplets we block because the virus variants are more transmissible, that means we need better mask materials and more layers.”
More specifically, the CDC correlated different types of masks with
efficiencies in blocking particles small enough to be considered “most
important for transmitting SARS-CoV-2.”
How to double mask
Double masking involves wearing two masks, one on top of the other. Some
people opt for a medical-grade mask like an FDA-certified N95, KN95 or
KF94 and layer a reusable cloth face mask on top of it. If you do use a
disposable face, make sure to knot and tuck the mask for a tighter fit.
By eliminating the gap where germs and other contaminants can slip in, a
simple knot-and-tuck can reduce a person’s exposure to particles by
64.5 percent, the CDC reported. An easy way to see if the mask fits
improperly is if cold breath comes out from the sides of the mask or if
your glasses fog up.
If you don’t have access to a medical-grade mask, Love said you can also double up reusable cloth masks — the CDC recommends choosing fabric with two or more layers of tightly woven cotton, which is both machine-washable and breathable. “Overall, more layers is going to be better regardless,” Love noted, “because you’re providing a better physical barrier for these droplets.”
The World Health Organization (WHO) issued an update to coronavirus mask-wearing guidance for the first time in nearly six months. In the update, the health agency advises wearing a mask as part of “a comprehensive package of prevention and control measures” to limit the spread of COVID-19.To get more news about nonmedical dust proof mask, you can visit tnkme.com official website.
“A mask alone, even when used correctly, is insufficient to provide adequate protection or source control,” the Dec. 1 guidelines said. “Other infection prevention and control (IPC) measures include hand hygiene, physical distancing of at least 1 metre, avoidance of touching one’s face, respiratory etiquette, adequate ventilation in indoor settings, testing, contact tracing, quarantine and isolation.”The agency further stated that depending on the type of mask used, it can “be used either for protection of health persons or to prevent onward transmission (source control).” WHO recommends that anyone with suspected or confirmed coronavirus wear the mask while in the presence of others and that proper use, storage, cleaning and disposal are essential to effectiveness.
In areas of known or suspected community or cluster SARS-CoV-2
transmission: WHO advises that the general public should wear a
non-medical mask in indoor shared workplaces, schools, or outdoor
settings where physical distancing of at least 1 metre cannot be
maintained,” the guidelines stated. “If indoors, unless ventilation has
been assessed to be adequate, WHO advises that the general public should
wear a non-medical mask, regardless of whether physical distancing of
at least 1 metre can be maintained.”
“Children aged up to 5 years should not wear masks for source control,”
WHO’s guidelines state. “For children between 6 and 11 years of age, a
risk-based approach should be applied to the decision to use a mask;
factors to be considered in the risk-based approach include intensity of
SARS-CoV-2 transmission, child’s capacity to comply with the
appropriate use of masks and availability of appropriate adult
supervision, local social and cultural environment, and specific
settings such as households with elderly relatives, or schools.”
WHO was also careful to note that face shields, at present, are not considered to be equivalent to masks with respect to respiratory droplet protection or source control. In situations where a mask is not available or there is difficulty wearing a face mask, it may prove to be an inferior alternative.
BEAUTIFUL Keepsake charm bracelet with Your baby's "first photo" (Sonogram).To get more news about photo bracelet, you can visit koalaprint.com official website.
Also included on this bracelet is a decorative heart charm and and Swarovski Channel Silver Plated Birthstone Charm.
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What is a "Push Present"?
A push present is a present a father gives to the mother to mark the occasion of her giving birth to their child. In practice the present may be given before or after the birth, or even in the delivery room. The giving of push presents has supposedly grown in the United States in recent years. A push gift is any type of present loved ones give to a woman who has recently given birth to a child
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FAMILY IS WHAT GIVES MEANING AND PURPOSE BEHIND EVERY LIVING SOUL ON THIS PLANET. WITHOUT THE UNITY AND FOUNDATION THAT STEAMS FROM OUR FAMILIES, WE’RE JUST ANOTHER SPECIES IN THE ANIMAL KINGDOM. WE LIVE, WE LOVE, AND WE FIGHT FOR OUR FAMILY AND THAT IS EXACTLY WHAT OUR PENDANTS STAND FOR. OUR PERSONALIZED PHOTO PENDANTS AREN’T ONLY PRECIOUS GIFTS TO GIVE BUT ALSO SERVE AS A CONSTANT REMINDER OF OUR UNWAVERING LOYALTY TO THOSE WE CALL FAMILY.
LIFE IS SUMMARIZED BY MANY AS, “YOU’RE BORN, YOU LIVE, AND THEN YOU DIE.” ALONG THE WAY, WE HAVE A SERIES OF MANY “FIRSTS” …THE FIRST SPOKEN WORDS OUT OF OUR LITTLE MOUTHS, THE VERY FIRST STEPS WE EVER TOOK, AND THOSE FIRST FEW TEETH WE ENDED UP LOSING. HOWEVER, ONCE WE GOT PASS THE LEARNING CURVE OF OUR “ABC’S” AND “123’S”, WE DECIDED TO TAKE ON THE WORLD AND, IN THE PROCESS, WE FOUND OUR SOUL MATE. NOW TAKE A MOMENT TO GLANCE BACK AT EVERY STEP YOU’VE EVER TAKEN, AND THEN TAKE ONE FINAL LOOK AHEAD OF YOU. THERE YOU WILL FIND THE ONE YOU WILL SPEND THE REST OF YOUR LIFE WITH. WHETHER IT’S AN ANNIVERSARY PRESENT, WEDDING GIFT, OR JUST A LOVELY GESTURE…OUR BEAUTIFULLY HANDCRAFTED PENDANTS EMBODY THE SACRED WORDS OF “I LOVE YOU”.
REMEMBER THE DAY YOU FOUND OUT YOU WERE GOING TO BE A MOTHER OR A FATHER? WHETHER YOUR MIND WENT BLANK OR HIT 0 TO 60 IN A SPLIT SECOND…YOUR HEART MUST HAVE EXPLODED WITH LOVE! AND WE DON’T BLAME YOU! OUR HEARTS MELT AT THE SIGHT OF A LITTLE CHUBBY BABY AND WE’RE SURE YOURS DOES TOO! AS A WAY OF CAPTURING THEIR INNOCENT WIDE-EYED STARES AND THEIR VAST CURIOSITIES, WE WOULD LIKE TO PERSONALIZE OUR PENDANTS WITH YOUR BABY’S PHOTO…COMBINING OUR INGENUITY WITH YOUR IRRESISTIBLE BUNDLE OF JOY! BE IT FOR YOUR BABY’S ARRIVAL OR A CUTE REMINDER OF YOUR LITTLE ONE, OUR TREASURES ARE YOURS FOR THE TAKING!
The DIY makers who build their own watches
“It probably started on Reddit,” recalls Matthew Wright, an engineer from Brisbane, Australia. Online, he stumbled on a couple of posts from people who had made their own watches. He’d never even thought about doing something like that, but now he wanted to have a go too.To get more news about custom watch, you can visit koalaprint.com official website.
He started reading forums, researching tools and materials, and checking out where parts could be acquired, such as cases, dials, hands, strap and movement. “It becomes like a big jigsaw puzzle, you try to work out what pieces will fit together,” he says.
Before long, he had made his own watch to wear on his wedding day – a black dial in a stainless steel case, with tan strap. And then, he made four more in a similar style to give to his groomsmen.
“They still wear the watches on a regular basis – it’s quite a nice feeling when I see them wearing it,” he says.Thanks in part to the availability of information over the web, many people just as curious as Wright have embarked on their own home-made watch projects. And some have even launched businesses as a result. But how easy is it to get started?
A quick hit on Google will bring up a wave of results that can kick things off for enthusiasts. There’s the Reddit Watch forum, the TimeZone Watch School, which offers courses via the web for a price, discussions on the WatchUSeek forum, and hundreds of YouTube videos aimed at makers.
People can buy kits for assembling watches or individual parts online with relative ease, too. This is the exact rabbit-hole that Wright fell down when he started researching.
“You see other people who’ve made little changes to watches, they’ve changed dials or whatever, and the next thing, I stumbled across websites where you can buy the cases completely empty,” he recalls.People like Wright, who have a bit of experience with making their own bits of tech, will already have some of the necessary tools and know-how to get going, of course. One such person is Mike Hamende. By day, Hamende is a nuclear power plant operator in Illinois. By night, he makes things – from drones to robots to toys and his own circuit boards.
“My hobby is design and fabrication, and at the time a watch felt like a natural project to attempt,” he says, remembering how he embarked on making his first watch, with a glow-in-the-dark dial.He’s since made two more with mechanical movements. Initially, he decided to take apart some watches in his own collection to try and learn how everything slotted together. Then, he found technical details about the movements online – importantly, these provided the detailed dimensions he needed to plan his design.
“Basically, those drawings tell you the size and shape of the cavity you need to have inside your watch case for the movement to fit properly,” he says.
The whole thing was modelled in computer software and then brought to life with the help of tools, like a ‘fly cutter’, that could mill and shape the materials he was using.A hobby is one thing. But some take their watch-designing even further. In 2013, Jan Binnendijk, a maker in the Netherlands, found an old, broken watch once worn by his father. In the process of taking it apart and fixing it, he fashioned his own parts – including a case, dial and hands. By the time he’d finished, much of the device was brand new.
Later, he published photos of his project on a Dutch watch forum. “That drew the attention of a guy who was starting his own watch company. He needed a supplier of cases,” recalls Binnendijk.
A team of five people eventually came together to make 52 watches with pre-made movements. They sold them for 500 euros ($615) each, which Binnendijk says covered the cost of materials.
Personalized Gifts and Cards Market report explores various marketing opportunities, top challenges, Covid-19 impact and recovery on market size and share. The main objective of Personalized Gifts and Cards market report is to provide growing demand status of Top Manufacturers - Personalised Memento Company, Disney, Redbubble, Card Factory, Funky Pigeon, The Original Gift Company, Etsy.To get more news about koala print, you can visit koalaprint.com official website.
Global “Personalized Gifts and Cards Market” report presents a proficient evaluation of upcoming market trends and current and futuristic growth strategies supported by top key players. It offers excellent understanding of manufacturing cost structure, regional landscape along with statistics, country-level market size, and segmentation by market growth over the forecast period. Personalized Gifts and Cards market report is a comprehensive research that provides market size and share analysis according to top regions, drivers, opportunities and challenges, risks and entry barriers are also covered.
The Personalized Gifts and Cards market report is segmented as “North America, Latin America, Asia Pacific, Europe, and Middle East and Africa”. These regions are described well and elaborated with demographic insights and potential lucrative regions for the business owners to tap and expand their business geographically.
This report mainly elaborates the definition, types, applications and
major players of Personalized Gifts and Cards market with deep analysis
about market status, enterprise competition pattern, advantages and
disadvantages of enterprise products, industry development trends,
regional industrial layout characteristics and macroeconomic policies,
industrial policy has also been included. From raw materials to
downstream buyers of this industry will be analyzed scientifically, the
feature of product circulation and sales channel will be presented as
well. In a word, this report will help you to establish a panorama of
industrial development and characteristics of the Personalized Gifts and
Cards market.
Chapter 1 is the basis of the entire report. In this chapter, we define
the market concept and market scope of Personalized Gifts and Cards,
including product classification, application areas, and the entire
report covered area.
Chapter 2 is the core idea of the whole report. In this chapter, we provide a detailed introduction to our research methods and data sources.
Chapter 3 focuses on analyzing the current competitive situation in the Personalized Gifts and Cards market and provides basic information, market data, product introductions, etc. of leading companies in the industry. At the same time, Chapter 3 includes the highlighted analysis--Strategies for Company to Deal with the Impact of COVID-19.Chapter 5 Different application fields have different usage and development prospects of products. Therefore, it provides subdivision data of different application fields and market forecasts.
Chapter 6 includes detailed data of major regions of the world, including detailed data of major regions of the world. North America, Asia Pacific, Europe, South America, Middle East and Africa.
Chapters 7-26 focus on the regional market. We have selected the most representative 20 countries from 197 countries in the world and conducted a detailed analysis and overview of the market development of these countries.
Chapter 27 focuses on market qualitative analysis, providing market driving factor analysis, market development constraints, PEST analysis, industry trends under COVID-19, market entry strategy analysis, etc.
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1. Choose high-quality copper rods
In cable production, copper conductors are often purchased from outside. At this time, high-quality raw materials should be selected and the supplier's transportation, delivery, storage and other links should be standardized. For transportation and storage of copper rods, plastic cloth or plastic film can be used to cover the copper rods, and the simplest physical barrier method is used to prevent the copper rods from contacting moist air. At the time of delivery, check the copper rod with naked eyes for signs of blackening, and control the oxidation of the copper conductor from the source.
2. Control of copper rod drawing process
1>. Choose a suitable mold to avoid the variation of the copper rod crystal lattice and accelerate the temperature rise and oxidation of the metal copper.
2>. Check the temperature and humidity of the emulsion before starting the machine to ensure that the emulsion is an alkaline solution.
3>. The take-up and take-up line should keep the copper rod tension uniform and stable, and the surface of the metal copper itself should be dried.
4>. After drawing the bottom plate, seal it with a transparent plastic film and store it in a dry environment.
3.Copper wire stranding and insulation, sheath rubber extrusion process
1>. In the process of twisting, the infusion hose can be used to drip the antioxidant into the copper wire. The dripping standard is based on the surface of the copper wire just soaking, so that a passivation film can be formed on the surface of the copper conductor to avoid oxidation.
2> During the extrusion process, water should be avoided in the end of the thread to prevent the end of the thread from oxidation and blackening.
1. Core area
Under normal circumstances, the core area (cross-sectional area of the wire) is proportional to the current-carrying capacity, that is, the larger the core area, the greater the current-carrying capacity.
2. Conductor material
The current carrying capacity of different materials under the same conditions: silver>copper>aluminum. If copper wire is used to replace aluminum wire, the current carrying capacity can be increased by 20%-30% under the same specifications.
3. Insulation material
The temperature resistance of commonly used insulating materials is polyvinyl chloride: 70°C, cross-linked polyethylene: 90°C, and polyolefin material: 150°C. The use of insulating materials with good high temperature resistance and thermal conductivity can increase the current carrying capacity of the cable.
4. Contact resistance
The smaller the resistance coefficient of the cable, the larger the allowable current-carrying capacity. Therefore, soldering, soldering, and crimping can be considered when bonding wire ends to reduce contact resistance.
5. Cable spacing
When multiple wires are laid in parallel, the proximity effect and skin effect will be formed, so that the electric charge is concentrated in the part of the wire cross section and the allowable current carrying capacity of the wire is reduced. In addition, applying multiple strips will cause heat accumulation, which will also reduce the current-carrying capacity.
6. Ambient temperature
The greater the thermal resistance around the cable, the worse the heat dissipation and the smaller the current carrying capacity.