The authors of this article present one of the pedagogical experiences, the kitá Pardés Alef, that take place every Sunday in the Majón Albert Einstein, at the Patronato of the Cuban Jewish Community ...and in the Sephardic Hebrew Center. Keywords: Education, jewish education, teaching-learning process, formation of values. Al no pertenecer a un sistema formal de enseñanza, consideramos el límite mayor de nuestra actividad el propio ser humano, su deseo de conocer, pertenecer, hacer, ser; desafíos constantes. En el 2do, 5776 (2015-2016), la historia y la identidad del pueblo judío tuvieron primacía; en el 3ero, 5777 (2016-2017), se hizo énfasis en las creencias, la liturgia y las fiestas y conmemoraciones; en el 4to, 5778 (2017-2018), la historia moderna y contemporánea de nuestro pueblo estuvo en el centro de las clases; y en el 5to, 5779 (2018-2019), la identidad y los valores judíos, como el de la responsabilidad, fueron el motor impulsor.
Einstein's Juryis the dramatic story of how astronomers in Germany, England, and America competed to test Einstein's developing theory of relativity. Weaving a rich narrative based on extensive ...archival research, Jeffrey Crelinsten shows how these early scientific debates shaped cultural attitudes we hold today.
The book examines Einstein's theory of general relativity through the eyes of astronomers, many of whom were not convinced of the legitimacy of Einstein's startling breakthrough. These were individuals with international reputations to uphold and benefactors and shareholders to please, yet few of them understood the new theory coming from the pen of Germany's up-and-coming theoretical physicist, Albert Einstein. Some tried to test his theory early in its development but got no results. Others--through toil and hardship, great expense, and perseverance--concluded that it was wrong.
A tale of international competition and intrigue,Einstein's Jurybrims with detail gleaned from Crelinsten's far-reaching inquiry into the history and development of relativity. Crelinsten concludes that the well-known British eclipse expedition of 1919 that made Einstein famous had less to do with the scientific acceptance of his theory than with his burgeoning public fame. It was not until the 1920s, when the center of gravity of astronomy and physics shifted from Europe to America, that the work of prestigious American observatories legitimized Einstein's work. As Crelinsten so expertly shows, the glow that now surrounds the famous scientist had its beginnings in these early debates among professional scientists working in the glare of the public spotlight.
In this paper the Dirac and Faddeev-Jackiw formulation for Einstein's theory in the limit is performed; the fundamental Dirac's and Faddeev-Jackiw brackets for the theory are obtained. First, the ...Dirac brackets are constructed by eliminating the second class constraints remaining the first class ones, then we fix the gauge and we convert the first class constraints into second class constraints and the new fundamental Dirac's brackets are computed. Alternatively, we reproduce all relevant Dirac's results by means of the symplectic method. We identify the Faddeev-Jackiw constraints and we prove that the Dirac and the Faddeev-Jackiw brackets coincide to each other. * A detailed Faddeev-Jackiw study of Einstein's theory in the limit is performed. * Einstein's theory in the limit is a reducible theory. * The Dirac and Faddeev-Jackiw brackets for a reducible theory are constructed. * We show that Dirac's brackets and generalized FJ brackets are equivalents. * Dirac's and Faddeev-Jackiw approaches are compared.
Three quantum physicists have won the 2022 Nobel Prize in Physics for their experiments with entangled photons, in which particles of light become inextricably linked. All three winners are pioneers ...in the fields of quantum information and quantum communications, says Pan Jianwei, a physicist at the University of Science and Technology of China in Hefei who participated in some of Zeilinger's landmark experiments as a graduate student in the 1990s. Since Zeilinger's initial experiments, physicists have succeeded in teleporting electrons, as well as atoms and superconducting circuits.
In 1903, despite the vehement objections of his parents, Albert Einstein married Mileva Maric, the companion, colleague, and confidante whose influence on his most creative years has given rise to ...much speculation. Beginning in 1897, after Einstein and Maric met as students at the Swiss Federal Polytechnic, and ending shortly after their marriage, these fifty-four love letters offer a rare glimpse into Einstein's relationship with his first wife while shedding light on his intellectual development in the period before the annus mirabilis of 1905. Unlike the picture of Einstein the lone, isolated thinker of Princeton, he appears here both as the burgeoning enfant terrible of science and as an amorous young man beset, along with his fiance, by financial and personal struggles--among them the illegitimate birth of their daughter, whose existence is known only by these letters. Describing his conflicts with professors and other scientists, his arguments with his mother over Maric, and his difficulty obtaining an academic position after graduation, the letters enable us to reconstruct the youthful Einstein with an unprecedented immediacy. His love for Maric, whom he describes as "a creature who is my equal, and who is as strong and independent as I am, " brings forth his serious as well as playful, often theatrical nature. After their marriage, however, Maric becomes less his intellectual companion, and, failing to acquire a teaching certificate, she subordinates her professional goals to his. In the final letters Einstein has obtained a position at the Swiss Patent Office and mentions their daughter one last time to his wife in Hungary, where she is assumed to have placed the girl in the care of relatives. Informative, entertaining, and often very moving, this collection of letters captures for scientists and general readers alike a little known yet crucial period in Einstein's life.
Learning from the Bomb Carter, Preston; Bloom, Barry R.
The New England journal of medicine,
02/2024, Letnik:
390, Številka:
6
Journal Article
Recenzirano
To the Editor:
The Perspective article by Bloom, “Learning from the Bomb” (November 30 issue),
1
contains a substantial error. It references a letter from Albert Einstein, stating that Einstein was ...“pleading with Truman not to authorize use of the atomic bomb.” In fact, the cited letter was written to President Franklin Delano Roosevelt in August 1939, long before Harry Truman was even vice president. Furthermore, the letter’s text, available online,
2
served only to alert FDR as to the magnitude of atomic energy, its potential for wartime use, and the Hitler regime’s interest. Discouraging U.S. investigation or development in this area . . .
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