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list of inventions and inventors pdf free download in hindi विश्व के प्रमुख आविष्कार और आविष्कारक सूची GK PDF Download. This list gives important Inventions and Inventor name. Download Indian Polity Notes PDF List of Important Inventions and Discoveries. Tag - list of inventions and inventors pdf free download in hindi. Invention And Inventors In Hindi. GK/GS · विश्व व भारत के आविष्कार और आविष्कारक .

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Static genral knowledge topic which covers all comitative exams such as IBPS, SSC, CPO, Railways,Banking. List of all famous Inventors and. Famous Inventions and Inventors PDF - Free download as PDF File .pdf), Text File .txt) or read online for free. Famous-inventions-and-inventors-pdf. Here is the selective and important list of invention and Inventors for all types of competitive exams. These questions have been asked in competitive exams and .

The invention of Yvonne C. Brill - Female Canadian-American scientist, propulsion engineer, inventor - hydrazine resistojet propulsion system Yvonne C.

Brill developed the concept for a new rocket engine. She called it hydrazine resistojet. Resistojet is a method of spacecraft propulsion that provides thrust by heating a non-reactive fluid.

Patents of Yvonne C. Brill - Female Canadian-American scientist, propulsion engineer, inventor In , Yvonne Brill designed and invented the hydrazine resistojet propulsion system.

Yvonne Brill patented her propulsion system for satellites in She received U. Patent number 3,, for her invention. The first communications satellite using Yvonne's invention was launched in Her invention is still being used by satellites that handle worldwide phone service, long-range television broadcasts, and other tasks. Yvonne Brill's invention became a standard in the industry. It has brought millions of dollars of increased revenue for commercial communications satellite owners.

Awards and Honors of Yvonne C. Death of Yvonne C. Brill died of complications of breast cancer in Princeton, New Jersey on March 27, , at the age of Female Inventor Hertha Ayrton - Female British engineer, mathematician, physicist and inventor of Line Divider Hertha Ayrton is best known for her work on sand ripples and electric arcs.

Phoebe Sarah Marks adopted the name Hertha in her teenage years, after the ancient Germanic earth goddess. Hertha Ayrton is best known for her work on sand ripples and electric arcs. She was the third of eight children of a Jewish watchmaker and jeweler who had emigrated from Poland to escape the pogroms.

Her father died when she was seven, leaving her pregnant mother and her six brothers in poverty. Marks was of the idea that women needed a better not worse education than men, because "women have the harder battle to fight in the world. At 16, Sarah was working as a governess in order to support herself and her studies which she was determined to advance further.

She passed the Cambridge University Examination for Women in with honors in both English and maths. However, the University of Cambridge did not give degrees to women at the time, so she received her degree in science through the University of London in , instead. Hertha was a close friend of Marie Curie. She famously wrote: " Errors are notoriously hard to kill, but an error that ascribes to a man what was actually the work of a woman has more lives than a cat" after Marie's discovery of radium was attributed to her husband.

Hertha also conducted a vigorous campaign in the press.

Top 25 Inventors Found in Libraries

The writer was a keen supporter of education for women and she took an interest in Hertha's efforts to fund a place at Girton College. The career of Hertha Ayrton - Female British engineer, mathematician, physicist and inventor Hertha Ayrton earned money by teaching and embroidery. In , Hertha began attending evening classes at Finsbury Technical College where she met her future husband, Professor William Edward Ayrton who was a pioneer in electrical engineering and physics education and a fellow of the Royal Society.

After marrying William Ayrton in , Hertha began assisting him with experiments in physics and electricity. Hertha also began her own research on the characteristics of the electric arc. Hertha wrote articles on her research for The Electrician. In her articles, she explained that the problems with the electric arc were the result of oxygen coming into contact with the carbon rods used to create the arc.

A few hours later, she was elected the first women member of the IEE. The next woman was admitted to the IEE in It was not before the late 19th century that Hertha Ayrton's work in the field of electrical engineering was widely recognized not only in England but also internationally. Inventions of Hertha Ayrton - Female British engineer, mathematician, physicist and inventor In , Hertha Ayrton developed a device to blow away poisonous gases from the trenches, keeping soldiers fit.

More than , of the fans were used on the Western Front. Other inventions include mathematical dividers, arc lamps and electrodes, and propulsion of air. The invention of Hertha Ayrton - Female British engineer, mathematician, physicist, and inventor - Line Divider Hertha's first major invention was the line-divider. Her invention was an engineering drawing instrument for dividing a line into any number of equal parts and for enlarging and reducing figures.

The primary use for line-divider was for artists for enlarging and diminishing. However, it was also widely used by architects and engineers. Hertha's invention was shown at the Exhibition of Women's Industries receiving significant press attention.

Patents of Hertha Ayrton - Female British engineer, mathematician, physicist and inventor "In experimenting on the arc, my aim was not so much to add to the large number of isolated facts that had already been discovered, as to form some idea of the bearing of these upon one another, and thus to arrive at a clear conception of what takes place in each part of the arc and carbons at every moment.

In , Hertha patented her first major invention: the line-divider, an instrument used for dividing lines into a number of equal parts. Other patents include five on mathematical dividers, 13 on arc lamps and electrodes, and the rest on the propulsion of air. Arc lamps were used for public lighting at the time but they would flicker and hiss on the streets.

Hertha's work led to fixing this issue by binding the arc together to form one constant whole. Awards and Honors of Hertha Ayrton - Female British engineer, mathematician, physicist and inventor "The attempt to correlate all the known phenomena, and to bind them together into one consistent whole, led to the deduction of new facts, which, when duly tested by experiment, became parts of the growing body, and, themselves, opened up fresh questions, to be answered in their turn by experiment.

Hertha's certificate seems to have been the first in the history of the Society to be submitted in favor of a woman, and 41 years were to elapse before the next.

Hertha Ayrton is still the only woman to have received this medal. In , an English Heritage blue plaque was unveiled at 41 Norfolk Square in Paddington, where Herta lived, to commemorate her. Death of Hertha Ayrton - Female British engineer, mathematician, physicist and inventor Hertha Ayton died of blood poisoning caused by an insect bite on August 23, , in Bexhill-on-sea, Sussex, England.

Walker , was born in to a family of slaves on a plantation in Louisiana. Sarah Breedlove became an orphan at the age of seven after both her parents died from yellow fever. The career of Madam C. Walker - Female African-American entrepreneur, inventor "I want you to understand that your first duty is to humanity.

I want others to look at us and see that we care not just about ourselves but about others. Walker Aged 33, Sarah started her business career selling the first hair products known as Madame C. Walker Vegetable Shampoo. Her line of hair treatment, maintenance, scalp stimulation, and beauty products mainly targeted at black women focused on the need for a healthy and clean scalp, something not always possible due to living conditions back then.

She recruited 25, black women by the early s from North and Central America, and the Caribbean as door-to-door beauty consultants. Inventions of Madam C. Walker developed a formula mixing petroleum —similar to vaseline,— sulfur, and a little perfume to make it smell better. She used this formula to treat the severe scalp disease, a common disease of the time, which was causing the hair loss.

After the successful results, Madame Walker started bottling the formula and selling it door-to-door to other African-American women suffering from the same disease. Patents of Madam C. Walker did not patent any products herself. Madam C. The company was successful and it became famous for its African-American cosmetics and hair care products invented and developed by Madame C.

The Madame C. Walker Company was considered the most widely known and financially successful African-American owned business of the early twentieth century. In , the Madame C. Walker Company ceased operations. Madame C. An estimate of around 40, African-American worked for Madame C. Walker over the years that the Madame C.

List of Inventions and Inventors Questions:

Walker was active. A pioneer of the modern cosmetics industry, Madame C.

In , Sundial Brands launched a new line called Madam C. Walker Beauty Culture which is sold exclusively in Sephora stores and at Sephora. I want to say to every Negro woman present, don't sit down and wait for the opportunities to come. Get up and make them! Walker A remarkable woman, who fought against racism, she used her wealth to support African-American institutions, the black YMCA , helped people with their mortgages, donated to orphan and senior citizens homes, she wanted to found a school for black girls in Nigeria although she was not able to do it.

She thought educating young girls and women would make a difference in society. Death of Madam C. Walker, who is considered one of the most successful African-American entrepreneurs throughout history , passed away at the age of 51 from kidney failure in She is known for her work on Charles Babbage's proposed mechanical general-purpose computer, the Analytical Engine.

She wrote the instructions for the first computer program in the mids. Annabella left Lord Byron when Ada was two months old and later they legally separated.

Lord Byron left England and never came back. He died in Greece when Ada was eight years old.

Ada never knew him personally. Ada was also educated in music and French, though not in poetry. However, she had little contact with her daughter.

Ada was brought up by her maternal grandmother and servants. Ada's grandmother died when she was seven. Ada's mother demanded from her daughter that she should work hard. If she thought her young daughter had not worked hard enough she would punish her with long periods of isolation. Even though there were no places for girls in the United Kingdom's universities, girls from wealthy, aristocratic families could get a high-level education by private tutors.

Ada was privately educated by tutors and also self-educated. Augusts De Morgan, the first professor of mathematics at the University of London, helped Ada in her advanced studies. When her husband has created an earl in Ada became Countess of Lovelace. Then she became to be known as Ada Lovelace. The career of Ada Lovelace - Female English mathematician, writer, inventor "Mathematical science shows what is.

It is the language of unseen relations between things. But to use and apply that language, we must be able fully to appreciate, to feel, to seize the unseen, the unconscious.

Despite the age difference, Ada and Babbage were intellectual peers.

Ada corresponded with Charles Babagge for two decades. Inventions of Ada Lovelace - Female English mathematician, writer, inventor "The Analytical Engine does not occupy common ground with mere 'calculating machines. Ada Lovelace often considered her approach to mathematics as more of a poetical science from an analytical perspective.

Perhaps despite her mother's efforts to not let poetry into Ada's life had failed. Ada knew that the first computer needed to have a procedure installed that could help it be able to produce accurate calculations if such computer was expected to work right. Ada Lovelace created the first well-defined instructions that were necessary for the Analytical Machine to be able to function properly. The invention of Ada Lovelace - Female English mathematician, writer, inventor - Computer Program "We may say most aptly that the Analytical Engine weaves algebraical patterns just as the Jacquard loom weaves flowers and leaves.

In , Babagge asked Ada to translate an article that had been published by an Italian military engineer regarding the operations of the Analytical Engine. Ada then not only translated the document but also went on adding her own notes to the process so that they could be effectively added to the programming.

Ada's notes ended up being three times longer than the actual translation. She also corrected some errors she found in some of Babagge's calculations that were included in the document. Ada was then able to take this vision to see that computer programs could be expanded to do much more than just make basic calculation or crunch numbers.

Inventions become common in usage are innovations, and may. Greatest inventor of modern times. How do we know when inventions were first invented?

To the games, an inventors glossary and an invention journal to track the young inventors work. Check out the map for highlights of things invented or discovered in this period.

They had to be built to withstand desert winds, and Muslim inventors. Renaissance is better known for its artistic developments as seen by the works. Baker was an African-American who worked for the U. For more information on African-American inventions and inventors visit us at: And patent applications, partial European data, free PDF downloading, free account.

Test students knowledge about inventors and inventions. Who Invented What?

List of Inventions and Inventors GK Questions

During her film career, Lamarr co-invented the technology for spread spectrum and. Archived from the original PDF on 11 September Volunteer Job Description for edit locked pdf free Invent: An African American Inventors Curriculum. Carver, African-American scientist, teacher, and inventor, as a role model for. Invention and inventors pdf download.

Download Pdf file of Inventors and Inventions list from here. American Viscose Co. Mining History: Jeff Wadsworth and Lawrence Livermore National Laboratory have all done research, attempting to create steels with characteristics similar to Wootz, but without success J. D Verhoeven and Al Pendray attained some success in the reconstruction methods of production, proved the role of impurities of ore in the pattern creation, and reproduced Wootz steel with patterns microscopically and visually identical to one of the ancient blade patterns.

NET Framework. Kojo is an open-source software. It was created, and is actively developed, by Lalit Pant, a computer programmer and teacher living in Dehradun , India. Patent , , "Detector for electrical disturbances" , for a specific electromagnetic receiver. Microwave Communication : The first public demonstration of microwave transmission was made by Jagadish Chandra Bose , in Calcutta, in , two years before a similar demonstration by Marconi in England, and just a year after Oliver Lodge 's commemorative lecture on Radio communication, following Hertz's death.

Bose's revolutionary demonstration forms the foundation of the technology used in mobile telephony, radars, satellite communication, radios, television broadcast, WiFi, remote controls and countless other applications. Murty, a type of Lateral Shearing Interferometer utilizes a laser source for measuring refractive index.Bath to his commission for Digital Accessibility for The Blind in In her parent's view, there was no brilliant future in the life of young Caroline other than being a servant to them.

First tested run in Her invention is still being used by satellites that handle worldwide phone service, long-range television broadcasts, and other tasks.

Fundamental principle, double-pointed needle invented by Charles Fredrick Wiesenthal U. Ada Lovelace often considered her approach to mathematics as more of a poetical science from an analytical perspective.

Finally, one long rainy night in , the Laserphaco probe came through. After the successful results, Madame Walker started bottling the formula and selling it door-to-door to other African-American women suffering from the same disease. Electric Tram.

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