Category: Tech

A Metamaterial that make use of Origami

Image by Drishti IAS

Introduction

A car that dashes against an obstacle suffer damage, first to its fenders. To be useful, materials need to maintain a constant Poisson ratio under pressure when they crumble under pressure. However, they are prone not to do so, and the Poisson ratio varies as they deform. There is a keen interest to develop materials that can be sandwiched in the fender system which will absorb the shock and prevent the interiors from being damaged. Origami metamaterials that crumple rather than tear, and take the impact, can play an important role in such situations.

What is Metamaterials?

Metamaterials are nano-engineered media with designed properties beyond those available in nature with applications in all aspects of materials science. A metamaterial is any material engineered to have a property that is not found in naturally occurring materials. They are made from assemblies of multiple elements fashioned from composite materials such as metals and plastics. Some examples of available metamaterials are negative-index metamaterials, chiral metamaterials, plasmonic metamaterials, photonic metamaterials, etc.

What is Origami Metamaterials?

Origami Metamaterials combine the Japanese art of paper folding (origami) and the existing material of choice and fold it to obtain desired properties. Researchers of IIT Madras have developed a special class of origami metamaterials that show a constant value of Poisson Ratio when subjected to stress. These are manufactured by joining panels along their edges to form ‘creases’ about which the structure locally ‘folds’ or rotates about. The benefit is that the observed property does not depend on whether it is made from a sheet of paper, polymer, or metal.  The material the researchers have developed has a nearly constant Poisson function in the range –of 0.5 to 1.2 over a finite stretch of up to 3.0 with a minimum of 1.1.

Properties of Metamaterials

They are smart materials that have a wide range of properties and can be so different from each other that there isn’t a definition for them. Some of the properties it possess are

  • Unusual Electromagnetic Properties
  • Negative Refractive Index
  • Acoustic Control
  • Invisibility
  • Negative Electrical Permittivity
  • Magnetic Permeability
  • Artificial Origin.

Application of Metamaterials

Metamaterials hold attention due to various applications it can provide. Some of its application includes

  • Optical Filtering
  • Medical Devices
  • Remote Aerospace Operations
  • Sensor Detectors
  • Solar Power Management
  • Antenna Lenses

Conclusion

Origami metamaterials can provide a platform for the design of systems with a wide range of thermal expansion coefficients. Experiments and simulations are combined to demonstrate that by tuning the geometrical parameters of the origami structure and the arrangement of plates and creases, an extremely broad range of thermal expansion coefficients can be obtained that will provide a wide variety of applications.

References

All about James Webb Space Telescope

History

The success of Hubble Space Telescope after its repair mission in 1993 motivated the organizations to make a larger infrared light telescope that could see the past better. Hubble telescope system’s temperature interfered with the infrared radiation it received from the outer space. A new innovative next generation telescope was needed which was faster , better and cheaper. In 2003, NASA’s initial contract for James Webb Space Telescope(JWST) was $824.8 million collaborating with European Space Agency (ESA) , Canadian Space Agency(CSA). in 2005 after major redesign and re-planning , the mission cost reached a hefty amount of $4.5 billion. The telescope has a history of major cost overruns and delays due to backlashes from people and lack of funds.

Nevertheless, JWST launched on December 25, 2021 in Ariane 5 rocket from NASA Goddard Space Flight Centre, French Guiana. this orbiting infrared observatory will complement and extend the discoveries of the Hubble space telescope.

The telescope will cover a wavelength of 0.6 – 28.5 microns for the light falling from red till mid infrared wave spectrum .

Location

JWST will not orbit earth but will be move in a orbit of second Lagrange point(L2 point) which is about 1.5 million km away from the earth. The L2 point is sufficiently near to the earth allowing proper signal communication and the sun shield will prevent any infrared radiation coming from the Sun.

Sun-shield protection

For it to make observation in the infrared spectrum , it must be kept under 50K (−223.2 °C) otherwise the infrared radiation from its system , the earth , moon and sun will interfere with the data. It uses a large 5 layered tennis court sized sun-shield to block that radiation and maintains its surface temperature. the single layer is as thin as a human hair and made with polyamide films . the membranes are coated with aluminium from both sides and a silicon doped layer facing the sun. the shield can be folded 12 times to fit in the Ariane rocket .

The Honeycomb mirrors

The primary optical mirror is beryllium reflector with area 25.4 m2 . gold is used to coat all the 18 mirror segments because it is a highly reflective material for infrared wavelength. The honeycomb pattern utilizes the best use of space available and are also deployable .

Mission goals

  1. Search for galaxies formed after the big bang . It can look 13.5 billion years into the past , about 400 million years after the big bang.
  2. How galaxies evolve.
  3. Observe the formation of stars.
  4. Measure physical and chemical properties of the planetary systems including the Solar System.

This mission will take the Space Science to the next level, thanks to our Scientists……

Garena Free Fire Redeem Codes for November 1: How to redeem daily codes

Garena Free Fire Redeem Codes for October 28, 2021: How to redeem daily codes - Times of India

Garena Free Fire is a multiplayer fight royale game that has acquired ubiquity in the nation as of late. It is created by 111 Spots Studio where 50 players play 10-minute rounds. The game’s engineers continue to update alpha-numeric codes to the game regularly, allowing players an opportunity to win prizes free of charge.

Utilizing these codes, players can likewise get the advantage of opening specific advances and getting different award focuses. As referenced above, it is an activity experience fight imperial game. There is just a single victor toward the end.

n Garena Free Discharge, players have the choice to pick their beginning position, procure weapons and supplies that might be expected to expand their war zone. It is accessible on both Apple Application Store and Google Play Store.

Here is a bit by bit manual for reclaim the Garena Free Fire Recover Codes

Stage 1: Visit the authority site https://reward.ff.garena.com/en

Stage 2: Sign in to the game utilizing any online media account-Facebook, Google, Twitter, or VK IDs.

Stage 3: Players would then be able to reorder the reclaim codes into the text box and snap on the affirm button to proceed.

Stage 4: After the affirmation, a discourse box will spring up for cross-check. Snap on ‘alright’ to recover the codes.

Stage 5: Players can gather their compensation in the in-game mail area.

Note: The codes will require 24 hours to get credited and the focuses won’t work for visitor accounts.

Top Free Video Conferencing Tools

Amid the coronavirus pandemic, the world is in quandary regarding different adaptation methods relating to work culture. To bolster the growing needs of people from different walks of life there had been introduced several alternatives. The most effective so far had been video conferencing tools. It is essential to communicate to run a business or to even convey an idea. The video conferencing tools fulfil the requisites either it is of an online marketer or a student. To ensure the safety of the workers as well as not to limit productivity, there are top free video conferencing tools.

Zoom

The free video conferencing app empowers employees’ flexibility, working remotely from home. Features:   

  • User-friendly: The app is easy to use for meetings of decent duration. It also offers messaging solutions.
  • Affordable: The free-tier app broadens its variant users. It is convenient for both workers as well as students.
  • Supports a large number of participants: The free video conferencing tool can supports 100 members at the same time. It is suitable for large gatherings.

Therefore, the zoom app is highly recommendable owing to its scalable features and quick and easy set-up.

Google Meet

One of the widely preferred apps when it comes to top free video conferencing tools. Google meeting had now been advanced as per the needs of the people all around the world.

  • Free-tier: The google meet is now free for people having Gmail accounts. It has been improved as per the increasing needs.
  • Supports large participants: It now allows 100 participants on the video call at once.
  • Secured: Google meet is reliable because of its security assurance.

Skype

Skype has widened its parochial option which allowed only to stay connected with friend and family. It supports business meetings as well, allowing up to 50 participants at once.

  • Live subtitles: The app allows live subtitles during the meeting.
  • Can be opened in a web browser: Invitations to people can be sent via email, allowing them to join the meeting without being the app installed.
  • Affordable: Skype is a free video-conferencing app. However, Skype for business is a low-paid upgrade.

Free-Conference

The FreeConference tool is apt for International video calls. It is suitable for small businesses meeting, allowing only 5 members at once.

  • International dial-up: It allows International meetings dial-up for small, private meetings.
  • User-friendly: It is easy to use with chat and recording options available. It is easy to customize and use.
  • Budget-friendly: The powerful free version of the app serves several purposes.

Cisco Webex Meetings

The free version of Cisco Webex Meetings do not disappoint its users with its high degree security and available features.

  • Supports substantial users: Cisco WebEx meetings allows Hd video conferencing with 100 participants at one go.
  • 1GB cloud storage: The free version of the app provides 1GB cloud storage with unlimited meetings for endless time.

UberConference

The free version of the app is convenient as well because of the scalable feature provided.

  • Screen and document sharing: The app allows screen and document sharing. It allows 10 participants at once to attend the meeting.
  • Unlimited conferences with decent duration: The free version allows unlimited conference meetings with a duration of 45 minutes.
  • Call recording: Apart from providing Hd audio, it enables call recording feature as well.

LifeSize Go

The free version provides decent features. It is ideal for remote workers and small business groups.

  • Screen sharing: The app allows screen sharing and is available for up to 8 participants.
  • Unlimited video time: There is no restriction on the time length of video meetings.

Slack Video Calls

Slack Video calls are user-friendly and ideal for small meeting groups.

  • Message: The app provides messenger and supports up to 15 members.
  • Individual calls: Individual calls adds icing on the cake to the SlackVideo Calls.

Instagram, Facebook and Youtube live options have also gained relevant popularity owing to its variant options and user-friendly mode.

‘Work from home’ trend and ‘online classes’ are being practised widely in present times. The top free video conferencing tools make the task convenient for the users all around the globe.

IMPORTANT BOOKS TO READ IN YOUR 20’S

Reading is good for you because it improves your focus, memory, empathy, and communication skills. It can reduce stress, improve your mental health, and help you live longer. Reading also allows you to learn new things to help you succeed in your work and relationships.Reading has been proven to keep our minds young, healthy and sharp, with studies showing that reading can even help prevent alzheimer’s disease. Reading also develops the imagination and allows us to dream and think in ways that we would have never been able to before.

1) How to win friends and influence the people

How to Win Friends and Influence People is a self-help book written by Dale Carnegie, published in 1936. Over 30 million copies have been sold worldwide, making it one of the best-selling books of all time. Carnegie had been conducting business education courses in New York since 1912. The book is very easy to read and provides great examples and stories which makes it 10x easier to relate to and remember. I highly recommend this book, it has helped me improve certain aspects of my relationships and interactions with others.The core idea is that you can change other people’s behavior simply by changing your own. It teaches you the principles to better understand people, become a more likable person, improve relationships, win others over, and influence behavior through leadership.https://en.m.wikipedia.org/wiki/How_to_Win_Friends_and_Influence_People

2) Think and Grow Rich

Think and Grow Rich was written by Napoleon Hill in 1937 and promoted as a personal development and self-improvement book. He claimed to be inspired by a suggestion from business magnate and later-philanthropist Andrew Carnegie. https://en.m.wikipedia.org/wiki/Think_and_Grow_Rich The “secret” of Think and Grow Rich is to place yourself within the overall scheme of creation, obeying natural laws that inevitably and invariably beget growth, expansion, renewal, and generativity.

3) The Power of your subconscious mind

The Power of Your Subconscious Mind has been a bestseller since its first publication in 1963, selling many millions of copies since its original publication. It is one of the most brilliant and beloved spiritual self-help works of all time which can help you heal yourself, banish your fears, sleep better, enjoy better relationships and just feel happier. The techniques are simple and results come quickly. You can improve your relationships, your finances, your physical well-being. Your subconscious mind is a powerful force to be reckoned with. It makes up around 95% of your brain power and handles everything your body needs to function properly, from eating and breathing to digesting and making memories.

4) The Richest Man in Babylon

The Richest Man in Babylon is a 1926 book by George S. Clason that dispenses financial advice through a collection of parables set 4,000 years ago in ancient Babylon. The book remains in print almost a century after the parables were originally published, and is regarded as a classic of personal financial advice.This point is actually the crux of the book: the classic principle of paying yourself first. Clason recommends saving at least 10% of all income earned. Even in his example of those who are paying off debt, he still advocates setting aside this one-tenth. https://en.m.wikipedia.org/wiki/The_Richest_Man_in_Babylon#:~:text=The%20Richest%20Man%20in%20Babylon%20is%20a%201926%20book%20by,classic%20of%20personal%20financial%20advice.

5) Atomic Habits

An atomic habit is a regular practice or routine that is not only small and easy to do but is also the source of incredible power; a component of the system of compound growth. Bad habits repeat themselves again and again not because you don’t want to change, but because you have the wrong system for change. While it is well worth reading cover-to-cover as it is chock full of useful and actionable information about habits, from how and why we form them to how to break them and make them, I’ve decided to highlight my top takeaways and share with you the lessons I felt were the most profound. https://medium.com/tom-thoughts/i-finally-read-atomic-habits-here-are-my-top-5-takeaways-57dd6f904ab4

6 MUSCLE BUILDING FOODS

Gaining muscle is a slow process. It can take about three to four weeks to see a visible change. You’ll see some real results after 12 weeks, but it “all depends on your goals, and what type of strength training you are doing”

1) Eggs

Boiled eggs are eggs, typically from a chicken, cooked with their shells unbroken, usually by immersion in boiling water. Hard-boiled eggs are cooked so that the egg white and egg yolk both solidify, while soft-boiled eggs may leave the yolk, and sometimes the white, at least partially liquid and raw.

Hard-boiled eggs are a low-calorie, nutrient-dense food. They’re an excellent source of high-quality protein and rich in B vitamins, zinc, calcium and other important nutrients and antioxidants like choline, lutein and zeaxanthin.https://www.healthline.com/nutrition/boiled-egg-nutrition

2) Avacados

Avocado, a tree likely originating from south-central Mexico, is classified as a member of the flowering plant family Lauraceae. The fruit of the plant, also called an avocado, is botanically a large berry containing a single large seed. Researchers found overweight adults who ate avocado as part of breakfast showed improved blood flow, which can influence things like your blood pressure. They also found better after-meal blood sugar and blood-fat levels compared to those who ate the standard meal. Avocados are high in fat with 60 per cent of this being monounsaturated fats, which research suggests helps to protect against heart disease and lower blood pressure. They are also an excellent source of potassium, folate and fibre, all of which benefit the heart and cardiovascular system. https://www.bbcgoodfood.com/howto/guide/health-benefits-avocado

3) Berries

A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone or pit, although many pips or seeds may be present. According to a few studies, a bowl of blueberries can help in boosting immunity and can reduce the risk of diabetes, obesity and heart diseases. Moreover, consuming a small portion of berries daily can help in strengthening the metabolism and prevent any kind of metabolic syndrome and deficiency.https://m.timesofindia.com/life-style/food-news/what-happens-if-you-eat-blueberries-everyday/articleshow/71923432.cms

4) Yogurt

Strained yogurt, Greek yogurt, yogurt cheese, sack yogurt, or kerned yogurt is yogurt that has been strained to remove most of its whey, resulting in a thicker consistency than normal unstrained yogurt, while still preserving the distinctive sour taste of yogurt. Yogurt, also known as concentrated or strained yogurt, is made by eliminating the whey and other liquids from regular yogurt. Because the straining process reduces the total volume, Greek yogurt takes significantly more milk than regular yogurt to make a batch of the same size.It’s very nutritious, and eating it regularly may boost several aspects of your health. For example, yogurt has been found to reduce the risk of heart disease and osteoporosis, as well as aid in weight management.https://www.healthline.com/nutrition/7-benefits-of-yogurt

5) Salmon

Salmon are native to tributaries of the North Atlantic and Pacific Ocean. Many species of salmon have been introduced into non-native environments such as the Great Lakes of North America and Patagonia in South America. Salmon are intensively farmed in many parts of the world.

Salmon is one of the most nutritious types of fish that offers several health benefits. Rich in omega-3 fatty acids, vitamin B12, and other essential nutrients, salmon is wonderful for hair and skin health. The great taste and excellent health benefits of salmon make it one of the most loved fish in the world.While they are both excellent sources of protein and add to your nutrient profile, the benefits of fish tend to be slightly higher than chicken, especially when it comes to the Omega-3 content in it.https://m.timesofindia.com/life-style/health-fitness/diet/fish-vs-chicken-what-helps-you-lose-weight-faster-and-why/articleshow/78148854.cms

6) Milk

Milk is a nutrient-rich liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals, including breastfed human infants before they are able to digest solid food.Cow’s milk is a good source of protein and calcium, as well as nutrients including vitamin B12 and iodine. It also contains magnesium, which is important for bone development and muscle function, and whey and casein, which have been found to play a role in lowering blood pressure. It’s packed with important nutrients like calcium, phosphorus, B vitamins, potassium and vitamin D. Plus, it’s an excellent source of protein. Drinking milk and dairy products may prevent osteoporosis and bone fractures and even help you maintain a healthy weight.https://en.m.wikipedia.org/wiki/Milk

Twitter Rolls Out New Advertising Features, Revamped Algorithm Ahead of E-Commerce Push

Twitter on Tuesday carried out new ad includes and redid the calculation that chooses which commercials clients see, as a component of a work to lay the foundation to dispatch future web based business includes, the person to person communication organization told Reuters.

The new components come as Twitter is pushing to develop its exhibition promoting business, a technique that means to rapidly create deals, and established only 15% of Twitter’s business last year. The work could assist Twitter with arriving at its objective of multiplying yearly income by 2023.

The San Francisco-based organization is situating itself to ultimately permit brands to sell items through the assistance by first enhancing its capacity to show clients important notices and improving the probability they will tap the commercial.

Execution promotions are an exceptionally huge chance … that is moderately undiscovered for us,” said Kamara Benjamin, bunch item chief at Twitter, in a meeting. “At last, this will prompt individuals introducing applications, visiting sites and discovering items that address their issues.”

Notices advancing downloads for portable games and other applications, which are a significant sort of promotion via online media locales, will presently permit clients to start the download without leaving the Twitter application, the organization said in a blog entry on Tuesday. Beforehand, clients needed to pass on Twitter to download other applications.

Twitter added it is chipping away at new instruments to allow organizations to run commercials to discover clients who are bound to make in-application buys.

Slide-show ads that include numerous items would now be able to send clients to various sites when they click the notice, though beforehand brands could just pick one objective. This expanded the quantity of snaps by 25% on ad crusades that put out an objective of driving site visits, the organization said.

Twitter additionally further developed the promoting calculation, showing the commercials to a bigger pool of individuals toward the start of the mission so it can more readily measure client interest, Benjamin said.

Those calculation enhancements prompted a 36 percent increment in promotion crusades that accomplished no less than five downloads during the time span that the ad ran on Twitter, the organization said.

Mcaffeine Neem Face Wash

Mcaffeine Neem Face Wash Cleanser With Argan Oil & Vitamin E For Men And Women – 150 ml https://www.amazon.in/dp/B071X49GR9/ref=cm_sw_r_apan_glt_fabc_9B6RQWH965EW0W12D2T2

Factors used in this face wash are Caffeine, Neem, Argan Painting and Vitamin E. These all factor are skin-friendly. They not only clean your skin but also secure your skin. It’s extremely delicate to the skin, makes the skin smoother and vigour.

Greenberry Organics Detox activated Charcoal Face Wash

Greenberry Organics Detox activated Charcoal face wash for anti-pollution Oil control and anti-acne with the goodness of Tea tree, Mulberry and Grapefruit combo with Bio active Intense Night cream Unisex (100ml + 50ml) https://www.amazon.in/dp/B076PG55CF/ref=cm_sw_r_apan_glt_fabc_SFDCQPP9A8T30JCWP80Q

 Factors used in this face wash are Tea trees & fruits, charcoal and Vitamin c helps in keeping the skin healthy and soft. Makes the skin acne-prone and keeps it hydrated. Suitable for all types of skin.

Lotus Herbal Tea & Tree Anti Acne Face Wash

Lotus Herbals Tea Tree And Cinnamon Anti Acne Oil Control Face Wash, 80g https://www.amazon.in/dp/B0079Z7N3G/ref=cm_sw_r_apan_glt_fabc_D8N53Y620HHW1X1KDEBG

Lotus Herbals Tea Tree And CinnamonAnti-Acne Oil-control face Wash controls skin break out and lessens plenitude canvas without deserting any cleft- clogging buildup. It further controls sebum creation, lessens dry patches, and hydrates your skin. The cinnamon in it goes about as a natural constituent that evacuates dead skin cells and enhances blood income to make you look replenished and immature.

Clean & Clear Foaming Face Wash

Clean & Clear Foaming Face Wash For Oily Skin, 150ml https://www.amazon.in/dp/B00CI3HDMU/ref=cm_sw_r_apan_glt_fabc_HKAP31DH2V0G6FYKDJP1

A pomade-free facial cleanser that removes extra slick to help heal and avert boils. Formulated specially for gushy and combination skin types, this detergent flushes supererogatory canvas and contaminations. It helps combat papules and prevents them from returning. The detergent has a gentle formula suitable for everyday use.

Mama Earth Charcoal Face Wash

Mamaearth Charcoal Face Wash with Activated Charcoal & Coffee for Oil Control (100) https://www.amazon.in/dp/B07FPNW916/ref=cm_sw_r_apan_glt_fabc_dl_YSBZ7WZ30HTZNWR5C6K8?_encoding=UTF8&psc=1

Tired of the day-to-day struggle with gushing skin, choked pores, and dull skin? Bring back immaculate skin that looks immature and canvas-free with the power of Cranked Charcoal &Coffee.Crafted with the integrity of nature, Mamaearth Charcoal Face Wash pulls out poisons and contaminants from deep within the pores. The integrity of Coffee tightens skin pores and promotes yea skin tone to give you an canvas-free glowing complexion.

Neutrogena Deep Clean face wash

Neutrogena Deep Clean Facial Cleanser For Normal To Oily Skin, 200ml https://www.amazon.in/dp/B006LXDQRY/ref=cm_sw_r_apan_glt_fabc_dl_0F1YKXWWE1NGE0KQYS20

 Neutrogena is notable for making face fens for fulsome, acne-prone skin. This is your most solid option in the event that you have fulsome, and acne-prone skin. Delicate on your skin yet extreme on skin inflammation, the specific canvas-free equation tenderly purifies your skin from deep out. This face fen for fulsome skin contains Salicylic acid which is known to dispose of skin break out and reduces coming bunks.

Himalaya Neem Face Wash

Himalaya Herbals Purifying Neem Face Wash, 100ml https://www.amazon.in/dp/B002Q5JE2C/ref=cm_sw_r_apan_glt_fabc_1D670NAQADQ4RFK07F0X

Himalaya Herbals Purifying Neem Face Wash reduces skin inflammation and hickeys for all skin types. It has the combination of neem and turmeric for deep purification the skin from out without drying it out. It battles bacterial complications and forestalls there-occurrence of facial irregularities and calms your skin. It likewise improves the adaptability of the skin and positions out its tone.

Oily Skin

Soapy skin is more prone to acne, whelks, and pustules and hence you need an painting-free face swampland to remove supernumerary sebum and painting. So, to get relieve of the towering painting on your skin, you need to start using an painting- control face swampland.

Hagiographic skin is the main reason behind theover-creation of sebum in your skin. It makes your skin inclined to skin break out, pocks and operatives. It effectively catches other skin pollution which will in general obstruct pores and do your skin to appear dull and glutinous. But fret not as canvas control face mire is there for your deliverance. Use a face mire that suits your skin and mitigates you from your over the top creation of sebum. The worst part is soapy skin looks slippy and sticky which in turn results in occasion of whelks, pustules, and warts.