Science Today

[raj...@gmail.com]

June 7, 1862 - birthday of Philipp Eduard Anton von Lenard, a German physicist and the winner of the Nobel Prize for Physics in 1905 for his research on cathode rays and the discovery of many of their properties.

He confirmed some of J.J. Thomson's work, which eventually arrived at the understanding that cathode rays were streams of negatively charged energetic particles. He called them quanta of electricity or for short quanta, after Helmholtz, while J.J. Thomson proposed the name corpuscles, but eventually electrons has become the everyday term.

Lenard was the first person to study what has been termed the Lenard effect in 1892. This is the separation of electric charges accompanying the aerodynamic breakup of water drops. It is also known as spray electrification or the waterfall effect. Good morning!

Praveen Kumar Sayyaparaju
+91-9591945162

Sent from my BlackBerry 10 smartphone.

[Vinod Deshapande]

Sir infomation is most valuable. Thank u.

--
||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.
To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/20150607013854.5288018.82248.5405%40gmail.com.
For more options, visit https://groups.google.com/d/optout.

[raj...@gmail.com]

June 8, 1625 - birthday of Giovanni Domenico Cassini, an Italian mathematician, astronomer, astrologer and engineer. Cassini discovered four satellites of the planet Saturn and noted the division of the rings of Saturn (with the Cassini Division becoming named after him).

Launched in 1997, the Cassini spaceprobe was named after him and became the fourth to visit Saturn and the first to orbit the planet. Good morning!

[raj...@gmail.com]

June 9, 1781 - birthday of George Stephenson, an English civil engineer and mechanical engineer who built the first public inter-city railway line in the world to use steam locomotives, the Liverpool and Manchester Railway which opened in 1830. He is renowned as the "Father of Railways".

His rail gauge of 4 feet 8 1⁄2 inches (1,435 mm), sometimes called "Stephenson gauge", is the standard gauge by name and by convention for most of the world's railways. Good morning!

[raj...@gmail.com]

June 10, 1832 - birthday of Nikolaus August Otto, engineer of the first internal-combustion engine to efficiently burn fuel directly in a piston chamber.

Though the concept of four strokes, with the vital compression of the mixture before ignition, had been invented and patented in 1861 by Alphonse Beau de Rochas, Otto was the first to make it practical.

The Otto engine was designed as a stationary engine and in the action of the engine, the stroke is an upward or downward movement of a piston in a cylinder. Good morning!

[raj...@gmail.com]

June 11, 1910 - birthday of Jacques-Yves Cousteau, a French naval officer, explorer, conservationist, filmmaker, innovator, scientist, photographer, author and researcher who studied the sea and all forms of life in water. He co-developed the Aqua-Lung, pioneered marine conservation and was a member of the Académie française.

Aqua-Lung was the original English name of the first open-circuit, "self-contained underwater breathing apparatus" (or "SCUBA") to reach worldwide popularity and commercial success. This class of equipment is now commonly referred to as a diving regulator or demand valve. Good morning!

Praveen Kumar Sayyaparaju
+91-9591945162

(Anyone interested in getting this update directly in WhatsApp please ping me at the above number)

[Praveen Kumar Sayyaparaju]

June 13, 1911 - birthday of Luis Walter Alvarez, an American experimental physicist, inventor, and professor who was awarded the Nobel Prize in Physics in 1968.

 

Alvarez devised a set of experiments to observe K-electron capture in radioactive nuclei, predicted by the beta decay theory but never observed. He produced tritium using the cyclotron and measured its lifetime. In collaboration with Felix Bloch, he measured the magnetic moment of the neutron. He contributed to a number of World War II radar projects, from early improvements to Identification Friend or Foe (IFF) radar beacons, now called transponders, to a system known as VIXEN for preventing enemy submarines from realizing that they had been found by the new airborne microwave radars.

 

Alvarez was involved in the design of a liquid hydrogen bubble chamber that allowed his team to take millions of photographs of particle interactions, develop complex computer systems to measure and analyse these interactions, and discover entire families of new particles and resonance states. This work resulted in his being awarded the Nobel Prize in 1968.

 

The American Journal of Physics commented, "Luis Alvarez was one of the most brilliant and productive experimental physicists of the twentieth century." Good morning!

 

Praveen Kumar Sayyaparaju

+91-9591945162

 

[yankappa gunaki]

Science today

--

||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/000a01d0a58c%2442756a20%24c7603e60%24%40gmail.com.

[raj...@gmail.com]

June 14, 1736 - birthday of Charles-Augustin de Coulomb, a French physicist. He was best known for developing Coulomb's law, the definition of the electrostatic force of attraction and repulsion, and his work on friction. Coulomb was also a pioneer in the field of geotechnical engineering (his most valuable contribution being the retaining wall design).

The SI unit of electric charge, the coulomb, was named after him. His name is one of the 72 names of French scientists, engineers and mathematicians inscribed on the Eiffel Tower.

June 14 is celebrated as World Blood Donor Day (WBDD). The event, established in 2004, serves to raise awareness of the need for safe blood and blood products, and to thank blood donors for their voluntary, life-saving gifts of blood.

Donate blood, save lives!

Praveen Kumar Sayyaparaju
+91-9591945162

[raj...@gmail.com]

‎June 18, 1845 - birthday of Charles Louis Alphonse Laveran, a French physician who won the Nobel Prize in Physiology or Medicine in 1907 for his discoveries of parasitic protozoans as causative agents of infectious diseases such as malaria and trypanosomiasis.

In 1880, while working in the military hospital in Constantine, Algeria, he discovered that the cause of malaria is a protozoan, after observing the parasites in a blood smear taken from a patient who had just died of malaria. He found the causative organism to be a protozoan which he named Oscillaria malariae, but later renamed Plasmodium. This was the first time that protozoans were shown to be a cause of disease of any kind. The discovery was therefore a validation of the germ theory of diseases.

Laveran later worked on the trypanosomes, particularly sleeping sickness, and showed once again that protozoans were responsible for the disease. Good morning!

[Praveen Kumar Sayyaparaju]

June 19, 1623 - birthday of Blaise Pascal, a French mathematician, physicist, inventor, writer and Christian philosopher. He was a child prodigy who was educated by his father, a tax collector in Rouen.  Pascal's earliest work was in the natural and applied sciences where he made important contributions to the study of fluids, and clarified the concepts of pressure and vacuum.

 

In 1642, while still a teenager, he started some pioneering work on calculating machines. After three years of effort and fifty prototypes, he built 20 finished machines (called Pascalines) over the following ten years, establishing him as one of the first two inventors of the mechanical calculator.

 

19 June is also celebrated as the World Sickle Cell Day. Sickle Cell Disease (SCD) is the most frequent genetic disease worldwide. It is estimated that 500,000 are born every year with this severe and invalidating condition and that 50% of them will die before the age of 5 years. Good morning!

 

Praveen Kumar Sayyaparaju

+91-9591945162

 

[Bhagyalakshmi]

Sir, Please add this ID and No to Hindi STF Group
Ashok P S
Asst Teacher (Hindi)
GHS Moodugiliyaru
Kota Udupi
No 9449283815
somaya...@gmail.com
.

--
||| https://groups.google.com/forum/#!forum/mathssciencestf |||

1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha

2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15

3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions

4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member

5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/00cf01d0aa53%24a15034a0%24e3f09de0%24%40gmail.com.

[raj...@gmail.com]

‎June 21, 1781 - birthday of Siméon Denis Poisson, a French mathematician, geometer, and physicist. Poisson's name is attached to a wide variety of ideas, for example - Poisson's integral, Poisson's equation in potential theory, Poisson brackets in differential equations, Poisson's ratio in elasticity, and Poisson's constant in electricity.

The Poisson distribution, a discrete probability distribution, is named after him. A practical application of this distribution was made by Ladislaus Bortkiewicz in 1898 when he was given the task of investigating the number of soldiers in the Prussian army killed accidentally by horse kicks; this experiment introduced the Poisson distribution to the field of reliability engineering.

Poisson frequently said, "Life is good for only two things - discovering mathematics and teaching mathematics."

‎Wishing you a successful "International Day of Yoga"

Regards 

Praveen

[Praveen Kumar Sayyaparaju]

June 22, 1978 – Charon is discovered by American astronomer James W. Christy. Charon, also called (134340) Pluto I, is the largest satellite of the dwarf planet Pluto. Christy first suggested the name Charon as a scientific-sounding version of his wife Charlene's nickname, "Char". Charon is a very large moon in comparison to its parent body, Pluto (11.6% mass of Pluto). Its gravitational influence is such that the barycenter (centre of mass) of the Pluto–Charon system lies outside Pluto, it has been argued that Charon should be considered to be part of a binary system. The other moons of Pluto, Nix, Hydra, Kerberos and Styx, orbit the same barycenter, but they are not large enough to be spherical, and they are simply considered to be satellites of Pluto. Good morning!

Praveen Kumar Sayyaparaju
raj...@gmail.com

+91-9591945162

[Praveen Kumar S]

June 24, 1927 - birthday of Martin Lewis Perl, an American physicist who won the Nobel Prize in Physics  in 1995 jointly with Frederick Reines. The prize was awarded "for pioneering experimental contributions to lepton physics". Perl received half "for the discovery of the tau lepton" while Reines received his share "for the detection of the neutrino".

The tau lepton (τ, also called the tau particle, tauon or simply tau) is an elementary particle similar to the electron, with negative electric charge and a spin of 1⁄2, but with 3477 times the mass. Together with the electron, the muon, and the three neutrinos, it is classified as a lepton.

The symbol τ was derived from the Greek τρίτον (triton, meaning "third" in English), since it was the third charged lepton discovered. Good morning!

Praveen Kumar Sayyaparaju
+91-9591945162

[Praveen Kumar Sayyaparaju]

June 26, 1824 - birthday of William Thomson, 1st Baron Kelvin a British mathematical physicist and engineer. He did important work in the mathematical analysis of electricity and formulation of the first and second laws of thermodynamics, and did much to unify the discipline of physics in its modern form.

Absolute temperatures are stated in units of kelvin in his honour. While the existence of a lower limit to temperature (absolute zero) was known prior to his work, Lord Kelvin is widely known for determining its correct value as approximately −273.15 degree Celsius or −459.67 degree Fahrenheit. Good morning!

[raj...@gmail.com]

June 28, 1873 - birthday of Alexis Carrel, a French surgeon and biologist who was awarded the Nobel Prize in Physiology or Medicine in 1912 for pioneering vascular suturing techniques. He invented the first perfusion pump with Charles A. Lindbergh opening the way to organ transplantation.

Carrel was a young surgeon in 1894 when the French president Sadi Carnot was assassinated with a knife. His large abdominal veins had been severed, and surgeons who treated the president felt that such veins were too large to be successfully reconnected. This left a deep impression on Carrel, and he set about developing new techniques for suturing blood vessels. Good morning!

Praveen Kumar Sayyaparaju
+91-9591945162

[raj...@gmail.com]

‎June 29, 1893 - birthday of Prasanta Chandra Mahalanobis, an Indian scientist and applied statistician. He is best remembered for the Mahalanobis distance, a statistical measure. He founded the Indian Statistical Institute, and contributed to the design of large-scale sample surveys.

He made pioneering studies in anthropometry in India. Anthropometry involves the systematic measurement of the physical properties of the human body, primarily dimensional descriptors of body size and shape. Today, anthropometry plays an important role in industrial design, clothing design, ergonomics and architecture where statistical data about the distribution of body dimensions in the population are used to optimize products. Good morning!

[srinivasashwathreddy]

Sir, thank u very much for ur information on mahalanobis

Sent from Samsung tablet

--

||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/20150628235629.5288018.84349.5920%40gmail.com.

[Praveen Kumar Sayyaparaju]

June 30, 2015 - Today - the day will be longer by 1 second, called the leap second. While a typical 24 hour day has 86,400 seconds, it takes the Earth 86,400.002 seconds to complete a rotation. A leap second is added to compensate for the additional fraction.

This happens because Earth's rotation is slowing down, thanks to a kind of braking force caused by the gravitational tug of war among Earth, the sun and the moon. Many other factors can affect the length of a day. For example, seasonal and daily weather changes can influence the length of a day by several milliseconds every year.

Scientists added about one leap second every year from 1972 to 1999, but leap seconds have become less frequent since then; today's extra second is only the fourth since 2000.

The extra second can create glitches for stock traders, computer programmers and airline companies unless their systems are prepared for the change. Good morning!

Praveen Kumar S
+91-9591945162

[raj...@gmail.com]

‎July 1, 1882 - birthday of Bidhan Chandra Roy, the second Chief Minister of West Bengal in India. He  was a highly respected physician and a renowned freedom fighter. Bidhan Roy is often considered the great architect of West Bengal, who founded five eminent cities, Durgapur, Kalyani, Bidhannagar, Ashokenagar, Habra.

He was an alumnus of the Medical College Calcutta of the University of Calcutta. The National Doctors' Day is celebrated on the date of his birth (and death) 1 July every year. He was awarded Bharat Ratna on 4 February 1961.

[raj...@gmail.com]

‎July 2, 1862 - birthday of Sir William Henry Bragg, a British physicist, chemist, mathematician and active sportsman who uniquely shared a Nobel Prize with his son William Lawrence Bragg – the 1915 Nobel Prize in Physics: "for their services in the analysis of crystal structure by means of X-rays".

He invented the X-ray spectrometer and with his son (then a research student at Cambridge), founded the new science of X-ray crystallography, the analysis of crystal structure using X-ray diffraction.

The mineral Braggite is named after him and his son. Good morning!

[Praveen Kumar Sayyaparaju]

July 3, 1518 - birthday of Li Shizhen, was a Han Chinese polymath, medical doctor, scientist, pharmacologist, herbalist and acupuncturist of the Ming dynasty. His major contribution to clinical medicine was his 27-year work, which is found in his scientific book Compendium of Materia Medica (Bencao Gangmu).

He is also considered to be the greatest scientific naturalist of China, and developed many innovative methods for the proper classification of herb components and medications to be used for treating diseases.

The Bencao Gangmu is a medical text with 1,892 entries, each entry with its own name called a gang. The mu in the title refers to the synonyms of each name. The book has details about more than 1,800 drugs including 1,100 illustrations and 11,000 prescriptions. It also described the type, form, flavor, nature and application in disease treatments of 1,094 herbs. Good morning!

Praveen Kumar S
raj...@gmail.com
+91-9591945162

Sent from my Android Smartphone

[raj...@gmail.com]

July 4, 2012 – The discovery of particles consistent with the Higgs boson at the Large Hadron Collider is announced at CERN. The Higgs boson is named after Peter Higgs, one of six physicists who, in 1964, proposed the mechanism that suggested the existence of such a particle.

The Higgs boson is an elementary particle in the Standard Model of particle physics. Observations of the particle allows scientists to explore the Higgs field—a fundamental field of crucial importance to particle physics theory, that unlike other known fields such as the electromagnetic field, takes a non-zero constant value almost everywhere.

Higgs boson has often been called the "God particle", from a 1993 book on the topic; the nickname is strongly disliked by many physicists, including Higgs, who regard it as inappropriate sensationalism. Good morning!

[YMA Anand]

Good infmn. Thank u sir.

--

||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/20150704005205.5288018.86890.5973%40gmail.com.

[raj...@gmail.com]

July 6, 1885 – Louis Pasteur successfully tests his vaccine against rabies on Joseph Meister, a boy who was bitten by a rabid dog.

Despite the fact that he could have been prosecuted for practicing medicine without a license as he was not a medical doctor, Pasteur decided to treat the boy with a rabies virus vaccine grown in rabbits and weakened by drying, using an untested version of a treatment he had earlier tried on dogs. The treatment was successful and the boy did not develop rabies.

Pasteur is best known to the general public for his invention of the technique of treating milk and wine to stop bacterial contamination, a process now called pasteurization.

He is regarded as one of the three main founders of bacteriology, together with Ferdinand Cohn and Robert Koch, and is popularly known as the "father of microbiology". Good morning!

[raj...@gmail.com]

Dear all, as requested by several teachers I will be sending the messages of "Science Today" series the previous evening.

July 7, 1843 - birthday of Camillo Golgi, an Italian physician, biologist, pathologist, scientist, and Nobel laureate. Several structures and phenomena in anatomy and physiology are named after him, including the Golgi apparatus, the Golgi tendon organ and the Golgi tendon reflex.

The Golgi apparatus also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells. It is a major collection and dispatch station of protein products received from the endoplasmic reticulum.

Golgi is recognized as the greatest neuroscientist and biologist of his time. Golgi, together with Santiago Ramón y Cajal, received the Nobel Prize in Physiology or Medicine in 1906 for his studies of the structure of the nervous system. Good evening!

[DORA CARMINE D'SILVA]

Thank u sir...

--

||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/20150706135805.5328977.95799.5999%40gmail.com.

[raj...@gmail.com]

[Suchetha U. R.]

Thanks for the very good information abt Camillo Golgi!!!
Thanks alot once again!!

Suchetha upadhyaya
Kodankur- udupi

[raj...@gmail.com]

July 8, 1895 - birthday of Igor Yevgenyevich Tamm, a Soviet physicist who received the 1958 Nobel Prize in Physics, jointly with Pavel Alekseyevich Cherenkov and Ilya Frank, for their 1934 discovery of Cherenkov radiation.

Cherenkov radiation is electromagnetic radiation emitted when a charged particle (such as an electron) passes through a dielectric medium at a speed greater than the phase velocity of light in that medium. 

The characteristic blue glow of an underwater nuclear reactor is due to Cherenkov radiation. Good evening!‎

[raj...@gmail.com]

‎July 9, 1819 - birthday of Elias Howe, Jr.,  an American inventor and sewing machine pioneer.

Howe was not the first to conceive of the idea of a sewing machine. However, Howe originated significant refinements to the design concepts of his predecessors, and on September 10, 1846, he was awarded the first patent for a sewing machine using a lockstitch design.

Howe also received a patent for an "Automatic, Continuous Clothing Closure", the zip! Perhaps because of the success of his sewing machine, he did not try to seriously market it, missing recognition he might otherwise have received. Good evening!

[raj...@gmail.com]

‎July 10, 1902 - birthday of Kurt Alder, a German chemist and Nobel laureate. Alder received the 1950 Nobel Prize in Chemistry which he shared with his teacher Diels for their work on what is now known as the Diels–Alder reaction.

The Diels–Alder reaction is an organic chemical reaction between a conjugated diene and a substituted alkene, commonly termed the dienophile, to form a substituted cyclohexene system.

The lunar crater Alder is named in his honour. The insecticide aldrin, created through a Diels–Alder reaction, is also named after the scientist. Good evening!

[raj...@gmail.com]

July 11, 1801 – French astronomer Jean-Louis Pons makes his first comet discovery.

Pons was born in a poor family and received little formal education. He began working for the Marseille observatory as a caretaker, and gradually gained some experience in assisting the astronomers with observations. He learned to make observations himself, and had a remarkable ability to remember star fields and note changes in them.

In his early astronomical career, Pons was often the target of jokes perpetrated by more experienced astronomers. Franz Xaver von Zach once advised him to look for comets when sunspots were visible, though in doing so Zach may have inadvertently given Pons very good advice.

Between 1801 and 1827, Pons discovered thirty-seven comets, more than any other person in history.

[Raghavendra Kulkarni]

Dear sir ..is there any relationship between this scientist Pons & the  part of brain Pons..?

--

||| https://groups.google.com/forum/#!forum/mathssciencestf |||
 
1. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha
 
2. For STF training, visit http://karnatakaeducation.org.in/KOER/en/index.php/Cascade_District_Workshops_for_Mathematics_2014-15
 
3. For doubts on Ubuntu and other public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions
 
4. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member
 
5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ
---
You received this message because you are subscribed to the Google Groups "Maths & Science STF" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mathssciences...@googlegroups.com.
To post to this group, send email to mathssc...@googlegroups.com.
Visit this group at http://groups.google.com/group/mathssciencestf.

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/20150710161918.5328977.91211.6054%40gmail.com.

[Somanath Pamanakellur]

Join me to maths whatsapp group

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/CAJMrDd0AeXAAe78LaLu9uGGJWhtqutAjnp23%2BXov2z1M44i2zA%40mail.gmail.com.

[raj...@gmail.com]

July 12, 1863 - birthday of Léon Charles Albert Calmette, a French physician, bacteriologist and immunologist, and an officer of the Pasteur Institute.

He discovered the Bacillus Calmette-Guérin, an attenuated form of Mycobacterium used in the BCG vaccine against tuberculosis. He also developed the first antivenom for snake venom, the Calmette's serum.

The BCG vaccine can be anywhere from 0 to 80% effective in preventing tuberculosis for a duration of 15 years. It is on the WHO's List of Essential Medicines, a list of the most important medication needed in a basic health system. Good night!

[raj...@gmail.com]

July 13, 1831 - birthday of Jakob Ernst Arthur Böttcher, a Baltic German pathologist and anatomist.

Böttcher is largely known for his anatomical investigations of the inner ear, particularly studies involving the structure of the reticular lamina and nerve fibers of the organ of Corti.

Today his name is associated with the eponymous "Bottcher cells", which are cells of the basilar membrane of the cochlea. Other anatomical terms that contain his name are - Böttcher's canal, Böttcher's ganglion, Böttcher's space and Charcot-Böttcher filaments.

[Praveen Kumar S]

Dear Sir

There is no relationship that I know of. Anyway I will explore and will get back to you with more information.

Regards
Praveen

To view this discussion on the web, visit https://groups.google.com/d/msgid/mathssciencestf/CAJMrDd0AeXAAe78LaLu9uGGJWhtqutAjnp23%2BXov2z1M44i2zA%40mail.gmail.com.

[raj...@gmail.com]

‎July 14, 1921 - birthday of Sir Geoffrey Wilkinson, an English chemist who pioneered inorganic chemistry and homogeneous transition metal catalysis.

He is well known for his development of Wilkinson's catalyst RhCl(PPh3)3, and for the discovery of the structure of ferrocene. Wilkinson's catalyst is used industrially in the hydrogenation of alkenes to alkanes.

He received the Nobel Prize for Chemistry in 1973 for his work on “organometallic compounds” (with Ernst Otto Fischer).

He is also well known for writing, with his student F. Albert Cotton, "Advanced Inorganic Chemistry", often referred to simply as "Cotton and Wilkinson", one of the standard inorganic chemistry textbooks. Good evening!

[Praveen Kumar Sayyaparaju]

July 15, 1922 - birthday of Leon Max Lederman, an American experimental physicist who received the Nobel Prize for Physics in 1988, along with Melvin Schwartz and Jack Steinberger, for their research on neutrinos - "for the neutrino beam method and the demonstration of the doublet structure of the leptons through the discovery of the muon neutrino."

Among his achievements are the discovery of the muon neutrino in 1962 and the bottom quark in 1977. He is Director Emeritus of Fermi National Accelerator Laboratory (Fermilab) in Batavia, Illinois, USA.

In 1977, a group of physicists led by Leon Lederman announced that a particle with a mass of about 6.0 GeV was being produced by the Fermilab particle accelerator. The particle's initial name was the greek letter Upsilon. After taking further data, the group discovered that this particle did not actually exist, and the "discovery" was named "Oops-Leon" as a pun on the original name and Lederman's first name. Good evening!