i saw myself: ক্যালকুলেটর ছাড়া যে কোন সংখ্যাকে ভাগ করার একটি ef...

i saw myself: ক্যালকুলেটর ছাড়া যে কোন সংখ্যাকে ভাগ করার একটি ef...: ক্যালকুলেটর ছাড়া যে কোন সংখ্যাকে ভাগ করার একটি effective টেকনিক! ক্যালকুলেটর ছাড়া যে কোন সংখ্যাকে 5 দিয়ে ভাগ করার একটি effective টেকনিক ...

i saw myself: How do u dare to solve it !

i saw myself: How do u dare to solve it !: প্রাথমিক ধারণা, সংখ্যাপদ্ধতি,. পরিমাপ , ল.সা.গু গণিতের প্রাথমিক আলোচনা ▬► ক্যালকুলাসের আদি ধারণা দেন কে? নিউটন। ▬►সংখ্যাতত্ত্বের জনক কে? ...

Introduction of Spray Technology in Textile Science

Spray-on Fabric Technology:

 The British company Fabrican has developed a way to bond and liquefy fibres so that textiles can be sprayedout of a can or spray gun straight onto a body or dress form. The solvent then evaporates, and the fibres bond, forming a snug-fitting garment.

That idea just got a little less far-fetched. A liquid mixture developed by Imperial College London and a company called Fabrican lets you spray clothes directly onto your body, using aerosol technology.

After the spray dries, it creates a thin layer of fabric that can be peeled off, washed and reworn.

Fabrican is a patented instant spray-on fabric technology. It was invented by Dr. Manel Torres^[1] while investigating ways to speed up conventional methods of constructing garments as part of his PhD research in Fashion at the Royal College of Art and Imperial College London. Dr. Torres founded Fabrican Ltd in 2003. The technology was further developed by Fabrican Ltd while based at Imperial College London.

Fabrican is a spray-on material made from polymers and natural or synthetic fibres. The spray is delivered from a compressed air spray gun or aerosol can and dries instantly on contact with the air, creating a non-woven fabric that can be applied to many surfaces (including water).^[2] The material is completely sterile^[3]when it is dispensed from the spray gun or aerosol can.

Fabrican has been showcased at London Fashion Week 2010^[4] as well as fashion shows in Milan^[5] and Moscow^[6] and at numerous TED Talks.^[7][8] The technology has been featured in the media by the BBC,^[9][10] the Discovery Channel,^[11] CBS News^[12] and appeared in the film, Mr. Nobody, starring Jared Leto, and has been the subject of YouTube videos^[13] attracting millions of hits.

In 2014, in conformity with an organisational emphasis on developing biomedical applications, Fabrican occupied new laboratory facilities at the London Bioscience Corp.

Spanish fashion designer Manel Torres is the man behind the world’s first spray-on clothing, which is applied directly on the body and can be washed and worn again just like your regular clothes.

It may sound like something out of a futuristic film, but Manel Torres actually patented his amazing spray-on clothing back in the year 2000. He came up with this original idea while studying for his MA in Fashion Women’s Wear, at the Royal College of Art, London. Torres was aware of the slow process of creating regular garments, from weaving the actual fabric to dyeing it and tailoring the clothing items, so he tried to come up with “a futuristic, seamless, quick and comfortable material.” I’m sure most of you can come up with even more outrageous concepts than a spray-on fabric, but the Spanish designer was determined to make his a reality. Since he had no real knowledge of chemistry he sought the help of scientists at the London Imperial College, and after years of research and testing, Manel invented the spray that turns into a wearable second skin in contact with the human body.

Polymer Degradation ( You can read here in Bengali)

What is Polymer Degradation?

Polymer degradation is generally undesirable. The term degradation means uncontrolled reduction in the molecular weight or constitution of the polymer.

Degradation involves rupture of chemical bonds in the main chain of the polymer. When the polymer losses its lusture & strength, this deteriration in properties is due to a phenomenon called polymer degradation.

Types of Polymer degradation:

1. Physical degradation.
2. Chemical degradation.


Mention what factors are influence/ main causes for the degradation of polymer?

1. Physical degradation:

• Thermal Condition
• Mechanical condition
• By Ultrasonic Waves
• Photo degradation
• Degradation by Light energy
• Ionizing degradation. 

2. Chemical degradation:

• Oxidative degradation
• Hydrolytic
• Acidolytic
• Aminolytic

How Can you Control the Polymer degradation?

• Polymer degradation can be control by using Anti- Oxidants.
• Heat Stabilizer, which tends to inhibit the reaction between two or more other Chemicals. The term can also refer to a chemical that inhibits seperation of suspensions, emulsions & foams.
• By using Light Stabilizer.

What do you mean by Functionality?

The number of reactive functional groups of replaceable H2 atoms present in amonomer or the number of hydrogenation that can be added to a monomer is called functionality of the monomer.

Example: HOOC-(CH2)4-COOH      [ Functionality= 2]

                 

                 CH3-COOH                       [ Functionality= 1]

click the link for the detals study on controlling of polymer degradation.

Introduction & general function of Smart Clothing.

Smart Clothes

OUTLINE:

Ø  What is Smart Clothes?

Ø  Current Development

Ø  Transition from research to marketplace

Ø  Trends

Ø  References

What is Smart Clothes?

Definition: Smart Clothes are smart textile-based wearable  systems. 

Beginning: 1990s.

Related Technologies: Wireless sensor networks (WSN), GPRS, Bluetooth, Micro-processing, etc.

Current Development:

1. Healthcare Monitoring
2. Communications
3. Device Control
4. Haptics

Healthcare Monitoring:

Foundations:

Ø  Smart textile or sensors embedded in textile

Ø  Microprocessor

Ø  Signal Processing

Wireless Communication                                    

                            

Process of Healthcare Monitoring :

Communications :

With wireless communication devices in the smart clothes, we can easily realize communications by adding microphone, earphone, screen and keyboard on the sleeve to control the “cell-phone”.

    Thus, we can achieve other functions which can be done by cell-phones, like locating, calculating, playing games, and the like.

Device Control:

We can add a special button on keyboard of the sleeve to order the micro-controller to search and build connection with certain devices through Bluetooth. Then we can still use the keyboard to control other devices. 

Haptics:

By adding vibrators and accelermeters in to the smart clothes, we can realize functions like “Hugme” haptic jacket.

    Also, if we want to have a relax, we can use the keyboard to active certain vibrators to have a massage.

Transition from research to marketplace :

Technology Success Factors

The success of any product in the marketplace depends on:

Ø  Effectiveness

Ø  Cost

Ø  Quality

Ø  Convenience

             

Effectiveness :

Effectiveness means the products can successfully understand the user’s needs and meet them.

Ø  Continuous monitoring. Heart disease,  Diabetes,  and Influenza

Ø  No discomfort and irritation.

Ø  Can be fashionable

Cost-Benefit Analysis :

u Monitoring of individual will indeed increase the cost.

Ø  However, “investment in prevention is a lot less than the total cost of treatment”. For chronic diseases, systematic intervention would save on expensive treatments.

Ø  What’s more, life is priceless.

Quality :

Smart clothes will improve the quality of care dramatically.

Ø  Real time

Ø  Deal with emergency

              Ø Automation of  data processing can eliminate any potential errors from manually recording the data.

Trends:

1. Medical care T-shirt
2. Clothes used for special profession
3. Remote Device Control
4. More accurate feedback

Medical care T-shirt

•       Made of regular fabric, can be easily folded, washed, looks and feels familiar as a normal T-shirt

•       It has implemented a whole sensor & processing system, this system can sense user’s heart beat rates, blood pressure et al.

•       Can implement emergency measures like electrical CPR when heart beat rates become zero

Clothes of special profession:

•       Fireman clothes:

Fireproof, Vibrator

and GPS system,  

communication system.

•       Diving cloth:

Depth indicator, auxiliary equipment, Internal pressure adjustable

•       Pilot clothes:

Height indicator, Physical sign monitor, communication system

•       DIY the clothes you need:

You can design a clothes with any function you want

Remote device control:

•       Control the electrical devices of our house, office et al.

•       Using WiFi  or bluetooth to build up the connection

•       Highly integrated, one button can control all the necessary facilities

More accurate feedback:

•       Sensors can be more sensitive

•       The smart clothes gives users a feedback in forms of pressure, sound, heat or any other sense-perception so that it can provide the user more information

•       The feedback can be more accurate and reliable, so that it can be used in some special or emergency usages.