ΤΡΑΠΕΖΑ ΘΕΜΑΤΩΝ Α ΛΥΚΕΙΟΥ - ΑΛΓΕΒΡΑ - ΓΕΩΜΕΤΡΙΑ
Α' Λυκείου ΓΕΝΙΚΟ ΛΥΚΕΙΟ - ΗΜΕΡΗΣΙΟ
Το 2ο θέμα:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Το 4ο θέμα:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Ένα ενιαίο αρχείο, για ευκολία στην εκτύπωση:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Για τα υπόλοιπα μαθήματα της τράπεζας θεμάτων δείτε εδώ
Το 2ο θέμα:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Το 4ο θέμα:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Ένα ενιαίο αρχείο, για ευκολία στην εκτύπωση:
Δείτε εδώ τα θέματα Άλγεβρα και εδώ τα θέματα Γεωμετρίας.
Για τα υπόλοιπα μαθήματα της τράπεζας θεμάτων δείτε εδώ
Η Google τιμάει την ιταλίδα μαθηματικό Maria Gaetana Agnesi
Maria Gaetana Agnesi: Η γυναίκα που έλυνε μαθηματικά προβλήματα στον ύπνο της..
Η διάσημη μαθηματικός και φιλόσοφος, γεννήθηκε σαν σήμερα, το 1718 και η Google την τιμάει με το Doodle της.
Η Ιταλίδα μαθηματικός και φιλόσοφος Maria Gaetana Agnesi συγκαταλέγεται στις πιο γνωστές γυναίκες μαθηματικούς παγκοσμίως.
Ένα από τα θέματα με τα οποία ασχολήθηκε η μαθηματικός Maria Gaetana
Agnesi (1718-1799) είναι οι εξισώσεις γραμμών που προκύπτουν γεωμετρικά.
Η Maria Gaetana Agnesi, σε ηλικία μόλις πέντε ετών μπορούσε ήδη να
μιλάει ελληνικά (!), γερμανικά, ισπανικά, λατινικά αλλά και εβραϊκά. Ο
πατέρας της, ένας ευκατάστατος μαθηματικός, προφανώς της έδειξε τον
δρόμο της επιστήμης. Σε ηλικία 14 ετών μπορούσε να λύνει πολύ δύσκολες
ασκήσεις μαθηματικών και γεωμετρίας.
Σε ηλικία 20 ετών άρχισε να συγγράφει την πιο σημαντική δουλειά της, το
δοκίμιο Instituzioni analitiche ad uso della gioventu italiana (Μέθοδοι
Ανάλυσης), ένα δοκίμιο που προκάλεσε αίσθηση στον ακαδημαϊκό κόσμο της
εποχής.
Ο Πάπας Βενέδικτος ο 14ος την πρότεινε για τη θέση της καθηγήτριας στο
Πανεπιστήμιο της Μπολόνια, επαινώντας το έργο της, ενώ στους
επιστημονικούς κύκλους απέκτησε σημαντική αναγνώριση, εντούτοις έβλεπε
τα μαθηματικά ως μια περιστασιακή ενασχόληση...
Είναι γνωστή από μια καμπύλη που ονομάζεται «Μάγισσα της Agnesi» (Witch
of Agnesi). Σύμφωνα με το παρασκήνιο για την πατρότητα και την ονομασία
της καμπύλης, η καμπύλη δεν αποτελεί δημιούργημα της Agnesi, αλλά ήταν
ήδη γνωστή στον Pierre Fermat (1601-1665). Ο Luigi Guido Grandi,
καθηγητής μαθηματικών στο πανεπιστήμιο της Πιζα, την ονόμασε versiera
(από το λατινικό vertere = γυρίζω). Κατά σύμπτωση, υπάρχει μια σχεδόν
ομόηχη ιταλική λέξη, aversiera, που σημαίνει γυναίκα του διαβόλου. Έτσι
από λάθος μετάφραση η versiera του Grandi έγινε aversiera και ονομάστηκε
τελικά «μάγισσα της «Μάγισσα της Agnesi».
Τα τελευταία χρόνια της ζωής της τα αφιέρωσε στους άπορους συνανθρώπους
της, ενώ ταυτόχρονα συνέχισε να μελετά μαθηματικές εξισώσεις αλλά και
τις εξισώσεις των γραμμών.
Αξίζει να σημειωθεί ότι η Maria Gaetana Agnesi διέθεσε ακόμη και το
σπίτι της στην υπηρεσία τω αρρώστων, καθώς μετέτρεψε το μεγαλύτερο μέρος
του σπιτιού της σε νοσοκομείο!
Η Maria Gaetana Agnesi γεννήθηκε στο Μιλάνο της Ιταλίας, από μία πλούσια
οικογένεια. Ο πατέρας της, επίσης μαθηματικός, ήταν καθηγητής στο
πανεπιστήμιο της Μπολόνια.
Συνέγραψε ένα από τα σπουδαιότερα έργα της, αν όχι το σπουδαιότερο όλων,
το έτος 1748. Πρόκειται για το Instituzioni analitiche ad uso della
gioventù italiana.
Ετικέτες
βιογραφία,
Μαθηματικά,
google,
Mathematics
Dorothy Hodgkin: H Google τιμά τη βρετανίδα χημικό
Η Google αφιερώνει το σημερινό της doodle στην... επιστήμη!
Η Dorothy Hodgkin ήταν μια νεαρή επιστήμονας στο ανδροκρατούμενο ακαδημαϊκό κατεστημένο της Οξφόρδης. Δε διέθετε κανέναν εξοπλισμό, αλλά ούτε και την απαραίτητη χρηματοδότηση και ερευνητική ομάδα, βάλθηκε όμως να αποδείξει ότι η επιστήμη δεν μπορεί να έχει όρια ή φραγμούς.Το έτος 1940, η Dorothy Hodgkin αποκάλυψε τη χημική δομή της πενικιλίνης, ανοίγοντας με αυτό τον τρόπο τον δρόμο για τη συνθετική παρασκευή της, ενώ αργότερα σειρά θα είχαν πιο περίπλοκα μόρια, όπως της βιταμίνης Β-12 και της ινσουλίνης.
Γεννήθηκε στις 12 Μαϊου 1910, και απεβίωσε στις 29 Ιουλίου 1994. Ήταν η τρίτη γυναίκα στην ιστορία του θεσμού που κέρδισε το βραβείο Νόμπελ Χημείας το 1964.
Κέρδισε το βαρύτιμο αυτό βραβείο για την εργασία της στην κρυσταλλογραφία με ακτίνες Χ, ενώ την επόμενη χρονιά τιμήθηκε και με το περίφημο βρετανικό μετάλλιο Order of Merit.
The Nobel Prize in Chemistry 1964- Dorothy Crowfoot Hodgkin
Dorothy Crowfoot was born in
Cairo on May 12th, 1910 where her father, John Winter Crowfoot,
was working in the Egyptian Education Service. He moved soon
afterwards to the Sudan, where he later became both Director of
Education and of Antiquities; Dorothy visited the Sudan as a girl
in 1923, and acquired a strong affection for the country. After
his retirement from the Sudan in 1926, her father gave most of
his time to archaeology, working for some years as Director of
the British School of Archaeology in Jerusalem and carrying out
excavations on Mount Ophel, at Jerash, Bosra and Samaria.
Her mother, Grace Mary Crowfoot (born Hood) was actively involved in all her father's work, and became an authority in her own right on early weaving techniques. She was also a very good botanist and drew in her spare time the illustrations to the official Flora of the Sudan. Dorothy Crowfoot spent one season between school and university with her parents, excavating at Jerash and drawing mosaic pavements, and she enjoyed the experience so much, that she seriously considered giving up chemistry for archaeology.
She became interested in chemistry and in crystals at about the age of 10, and this interest was encouraged by Dr. A.F. Joseph, a friend of her parents in the Sudan, who gave her chemicals and helped her during her stay there to analyse ilmenite. Most of her childhood she spent with her sisters at Geldeston in Norfolk, from where she went by day to the Sir John Leman School, Beccles, from 1921-28. One other girl, Norah Pusey, and Dorothy Crowfoot were allowed to join the boys doing chemistry at school, with Miss Deeley as their teacher; by the end of her school career, she had decided to study chemistry and possibly biochemistry at university.
She went to Oxford and Somerville College from 1928-32 and became devoted to Margery Fry, then Principal of the College. For a brief time during her first year, she combined archaeology and chemistry, analysing glass tesserae from Jerash with E.G.J. Hartley. She attended the special course in crystallography and decided, following strong advice from F.M. Brewer, who was then her tutor, to do research in X-ray crystallography. This she began for part II Chemistry, working with H.M. Powell, as his first research student on thallium dialkyl halides, after a brief summer visit to Professor Victor Goldschmidt's laboratory in Heidelberg.
Her going to Cambridge from Oxford to work with J.D. Bernal followed from a chance meeting in a train between Dr. A.F. Joseph and Professor Lowry. Dorothy Crowfoot was very pleased with the idea; she had heard Bernal lecture on metals in Oxford and became, as a result, for a time, unexpectedly interested in metals; the fact that in 1932 he was turning towards sterols, settled her course.
She spent two happy years in Cambridge, making many friends and exploring with Bernal a variety of problems. She was financed by her aunt, Dorothy Hood, who had paid all her college bills, and by a £75 scholarship from Somerville. In 1933, Somerville, gave her a research fellowship, to be held for one year at Cambridge and the second at Oxford. She returned to Somerville and Oxford in 1934 and she has remained there, except for brief intervals, ever since. Most of her working life, she spent as Official Fellow and Tutor in Natural Science at Somerville, responsible mainly for teaching chemistry for the women's colleges. She became a University lecturer and demonstrator in 1946, University Reader in X-ray Crystallography in 1956 and Wolfson Research Professor of the Royal Society in 1960. She worked at first in the Department of Mineralogy and Crystallography where H.L. Bowman was professor. In 1944 the department was divided and Dr. Crowfoot continued in the subdepartment of Chemical Crystallography, with H.M. Powell as Reader under Professor C.N. Hinshelwood.
When she returned to Oxford in 1934, she started to collect money for X-ray apparatus with the help of Sir Robert Robinson. Later she received much research assistance from the Rockefeller and Nuffield Foundations. She continued the research that was begun at Cambridge with Bernal on the sterols and on other biologically interesting molecules, including insulin, at first with one or two research students only. They were housed until 1958 in scattered rooms in the University museum. Their researches on penicillin began in 1942 during the war, and on vitamin B12 in 1948. Her research group grew slowly and has always been a somewhat casual organisation of students and visitors from various universities, working principally on the X-ray analysis of natural products.
Dorothy Hodgkin took part in the meetings in 1946 which led to the foundation of the International Union of Crystallography and she has visited for scientific purposes many countries, including China, the USA and the USSR. She was elected a Fellow of the Royal Society in 1947, a foreign member of the Royal Netherlands Academy of Sciences in 1956, and of the American Academy of Arts and Sciences (Boston) in 1958.
In 1937 she married Thomas Hodgkin, son of one historian and grandson of two others, whose main field of interest has been the history and politics of Africa and the Arab world, and who is at present Director of the Institute of African Studies at the University of Ghana, where part of her own working life is also spent. They have three children and three grandchildren. Their elder son is a mathematician, now teaching for a year at the University of Algiers, before taking up a permanent post at the new University of Warwick. Their daughter (like many of her ancestors) is an historian-teaching at girls' secondary school in Zambia. Their younger son has spent a pre-University year in India before going to Newcastle to study Botany, and eventually Agriculture. So at the present moment they are a somewhat dispersed family.
Dorothy Crowfoot Hodgkin died on July 29, 1994.
Copyright © The Nobel Foundation 1964
Her mother, Grace Mary Crowfoot (born Hood) was actively involved in all her father's work, and became an authority in her own right on early weaving techniques. She was also a very good botanist and drew in her spare time the illustrations to the official Flora of the Sudan. Dorothy Crowfoot spent one season between school and university with her parents, excavating at Jerash and drawing mosaic pavements, and she enjoyed the experience so much, that she seriously considered giving up chemistry for archaeology.
She became interested in chemistry and in crystals at about the age of 10, and this interest was encouraged by Dr. A.F. Joseph, a friend of her parents in the Sudan, who gave her chemicals and helped her during her stay there to analyse ilmenite. Most of her childhood she spent with her sisters at Geldeston in Norfolk, from where she went by day to the Sir John Leman School, Beccles, from 1921-28. One other girl, Norah Pusey, and Dorothy Crowfoot were allowed to join the boys doing chemistry at school, with Miss Deeley as their teacher; by the end of her school career, she had decided to study chemistry and possibly biochemistry at university.
She went to Oxford and Somerville College from 1928-32 and became devoted to Margery Fry, then Principal of the College. For a brief time during her first year, she combined archaeology and chemistry, analysing glass tesserae from Jerash with E.G.J. Hartley. She attended the special course in crystallography and decided, following strong advice from F.M. Brewer, who was then her tutor, to do research in X-ray crystallography. This she began for part II Chemistry, working with H.M. Powell, as his first research student on thallium dialkyl halides, after a brief summer visit to Professor Victor Goldschmidt's laboratory in Heidelberg.
Her going to Cambridge from Oxford to work with J.D. Bernal followed from a chance meeting in a train between Dr. A.F. Joseph and Professor Lowry. Dorothy Crowfoot was very pleased with the idea; she had heard Bernal lecture on metals in Oxford and became, as a result, for a time, unexpectedly interested in metals; the fact that in 1932 he was turning towards sterols, settled her course.
She spent two happy years in Cambridge, making many friends and exploring with Bernal a variety of problems. She was financed by her aunt, Dorothy Hood, who had paid all her college bills, and by a £75 scholarship from Somerville. In 1933, Somerville, gave her a research fellowship, to be held for one year at Cambridge and the second at Oxford. She returned to Somerville and Oxford in 1934 and she has remained there, except for brief intervals, ever since. Most of her working life, she spent as Official Fellow and Tutor in Natural Science at Somerville, responsible mainly for teaching chemistry for the women's colleges. She became a University lecturer and demonstrator in 1946, University Reader in X-ray Crystallography in 1956 and Wolfson Research Professor of the Royal Society in 1960. She worked at first in the Department of Mineralogy and Crystallography where H.L. Bowman was professor. In 1944 the department was divided and Dr. Crowfoot continued in the subdepartment of Chemical Crystallography, with H.M. Powell as Reader under Professor C.N. Hinshelwood.
When she returned to Oxford in 1934, she started to collect money for X-ray apparatus with the help of Sir Robert Robinson. Later she received much research assistance from the Rockefeller and Nuffield Foundations. She continued the research that was begun at Cambridge with Bernal on the sterols and on other biologically interesting molecules, including insulin, at first with one or two research students only. They were housed until 1958 in scattered rooms in the University museum. Their researches on penicillin began in 1942 during the war, and on vitamin B12 in 1948. Her research group grew slowly and has always been a somewhat casual organisation of students and visitors from various universities, working principally on the X-ray analysis of natural products.
Dorothy Hodgkin took part in the meetings in 1946 which led to the foundation of the International Union of Crystallography and she has visited for scientific purposes many countries, including China, the USA and the USSR. She was elected a Fellow of the Royal Society in 1947, a foreign member of the Royal Netherlands Academy of Sciences in 1956, and of the American Academy of Arts and Sciences (Boston) in 1958.
In 1937 she married Thomas Hodgkin, son of one historian and grandson of two others, whose main field of interest has been the history and politics of Africa and the Arab world, and who is at present Director of the Institute of African Studies at the University of Ghana, where part of her own working life is also spent. They have three children and three grandchildren. Their elder son is a mathematician, now teaching for a year at the University of Algiers, before taking up a permanent post at the new University of Warwick. Their daughter (like many of her ancestors) is an historian-teaching at girls' secondary school in Zambia. Their younger son has spent a pre-University year in India before going to Newcastle to study Botany, and eventually Agriculture. So at the present moment they are a somewhat dispersed family.
From Nobel Lectures, Chemistry 1963-1970, Elsevier Publishing Company, Amsterdam, 1972
This autobiography/biography was written
at the time of the award and first
published in the book series Les
Prix Nobel.
It was later edited and republished in Nobel Lectures. To cite this document, always state the source as shown above.
Dorothy Crowfoot Hodgkin died on July 29, 1994.
Copyright © The Nobel Foundation 1964
Επαναληπτικά Θέματα Γ' Λυκείου 2014
Ερευνητικό Κέντρο Αξιολόγησης και Επιμόρφωσης της Ε.Μ.Ε.
Τράπεζα Θεμάτων
|
Τα θέματα του 2014
Αργυράκης Δημήτριος, Συντονιστής |
Πηγή: Ελληνική Μαθηματική Εταιρεία
Ετικέτες
Γ Λυκείου,
Μαθηματικά
Εγγραφή σε:
Αναρτήσεις (Atom)