Tewolde Gebremariam: From Humble Beginnings to Aviation Excellence
Tewolde Gebremariam, a name synonymous with visionary leadership and transformative growth in the aviation sector, has left an indelible mark on the industry, particularly in Africa. His journey from humble beginnings to becoming one of the most influential figures in African business is not just a narrative of personal success but a testament to the potential for growth and innovation in Africa&#;s economic landscape.
Born in Ethiopia, Tewolde Gebremariam&#;s journey in aviation began in when he joined Ethiopian Airlines as a transportation agent. His academic background, with a Bachelor&#;s in Economics from Addis Ababa University, followed by an MBA from the Open University in the UK, laid a strong foundation for his ascent through the ranks. His early career included stints in various departments, from cargo traffic handling to marketing and sales, showcasing his versatility and commitment to the airline&#;s growth.
Tewolde&#;s appointment as Group CEO in marked the beginning of an era where Ethiopian Airlines would not only expand but also redefine air travel in Africa. Under his leadership, the airli
Albert Einstein: a biography through the Time(s)
Roberto Lalli
European Physical Journal H,
Einstein’s theory of gravitation, also known as General Relativity, is now considered one of the pillars of modern physics. It contributes to our understanding of cosmology and of fundamental interactions between particles. But that was not always the case. Between the mids and the mids, General Relativity underwent a period of stagnation, during which the theory was mostly considered as a stepping-stone for a superior theory. In a special issue of EPJ H just published, historians of science and physicists actively working on General Relativity and closely related fields share their views on the process, during the post-World War II era, in particular, which saw the “Renaissance” of General Relativity, following progressive transformation of the theory into a bona fidae physics theory. In this special issue, new insights into the historical process leading to this renaissance point to the extension of the foundation of the original theory, ultimately leading to a global transfo
Einstein, Albert (–)
Albert Einstein was born in Ulm, in the south German kingdom of Württemberg on March 14, Following his graduation from the Federal Polytechnical Institute (ETH ) in Zurich in he obtained a job as a patent examiner, ("technical expert, third class") in the Swiss patent office in Bern, starting in the summer of In January he married his first wife, Mileva Maric, a fellow student of physics at the ETH and, with Mileva's support, continued his investigations in physics, earning a PhD from the University of Zürich in
That was Einstein's "miracle year." In Einstein published the founding papers of the special theory of relativity, including a version of the famous E = mc2. Also in he developed the light quantum hypothesis to treat the photo-electric effect, a work important in the subsequent development of the quantum theory and the official basis of his award of the Nobel Prize. There were also two papers on Brownian motion he produced that year, which helped demonstrate the reality of molecules.
Einstein left the patent office in , moving to Berlin in to assume the directorship of the new Kaiser Wilhelm Institute for Physics. There his m
Albert Einstein, born on March 14, , in Ulm, Germany, was a renowned theoretical physicist whose contributions revolutionized our understanding of the universe.
His groundbreaking work in the early 20th century encompassed the theory of relativity, the photoelectric effect, and significant contributions to quantum mechanics.
Beyond his scientific achievements, Einstein was a passionate advocate for peace and civil rights, leaving an indelible mark on both science and society.
In this overview, we will delve into the life and accomplishments of this iconic figure in the world of physics and humanitarianism.
Accomplishments of Albert Einstein
1. Theory of Special Relativity ()
In his paper, &#;On the Electrodynamics of Moving Bodies,&#; Einstein introduced the special theory of relativity. This theory revolutionized our understanding of space and time by proposing that the laws of physics are the same for all observers in uniform motion.
Also Read: Facts About Albert Einstein
Einstein&#;s theory introduced the concept of relative simultaneity, where events that appear simultaneous to one observer may not be simultaneous to another moving relative to the first observer
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