Léon Charles Thévenin
French engineer and circuit theorist
Developed Thévenin's theorem, which simplifies the analysis of electrical circuits by allowing complex networks to be represented as a simple voltage source and resistance. Contributed to advancements in electrical engineering and education through various publications and technical engagements. The theorem remains fundamental in circuit analysis and design in modern engineering.
Formulated Thévenin's theorem
Published influential engineering texts
Other People Born on March 30th
Kristine Lunde-Borgersen
Norwegian handball player, World Champion
Born
March 30th, 1980 45 years ago
A prominent handball player from Norway, achieved significant successes during a lengthy career. Played for teams including Larvik HK and the Norwegian national team. Contributed to Norway's victory in the 2009 World Championships, where the team secured the gold medal. Also participated in multiple European Championships and the Olympic Games, winning several medals, including gold at the 2008 Olympics.
Continue ReadingWasim Sajjad
Pakistani lawyer, politician, President
Born
March 30th, 1941 84 years ago
Born in 1941, served as the President of Pakistan on two occasions, first from 1990 to 1993 and then from 1993 to 1993. Apart from politics, contributed to the legal field in Pakistan, becoming a prominent lawyer. Involved in various political roles throughout the years, including serving in the Senate and holding key positions in different political parties. Played a significant role in formulating policies during tenures as President.
Continue ReadingRobbie Coltrane
Scottish actor in Harry Potter films
Born
March 30th, 1950 75 years ago
Died
October 14th, 2022 3 years ago — 72 years old
Born in 1950 in Rutherglen, Scotland, an actor gained widespread recognition for the role of Rubeus Hagrid in the film adaptations of the Harry Potter series. Coltrane's career spanned several decades, showcasing talent in both film and television. He appeared in the television series Cracker, earning critical acclaim and several awards, including the British Academy Television Award for Best Actor. Coltrane's versatility extended to voice work, lending his voice to various projects. He also had roles in other notable films such as GoldenEye and The World Is Not Enough. Coltrane's contributions to the arts were recognized through various accolades throughout his career.
Continue ReadingSergey Ilyushin
Aerospace engineer and aircraft designer
Born
March 30th, 1894 131 years ago
Died
February 9th, 1977 48 years ago — 82 years old
An engineer and businessman focused on aviation, played a significant role in the development of military and transport aircraft in the Soviet Union. Founded the Ilyushin Design Bureau, which produced a variety of notable aircraft models. Key designs included the Il-2 Sturmovik, a successful ground-attack aircraft during World War II, and the Il-76, a strategic airlift aircraft that became a workhorse for Soviet air transport. Contributed to advancements in aircraft design and engineering principles that shaped the future of aerospace.
Continue ReadingMehmed the Conqueror
Ottoman sultan and conqueror of Constantinople
Born
March 30th, 1432 593 years ago
Died
May 3rd, 1481 544 years ago — 49 years old
Ascended to the throne in 1444 and again in 1451 after a brief deposition. Captured Constantinople in 1453, marking the end of the Byzantine Empire. Consolidated power and expanded the empire's territory in the Balkans and the Aegean. Implemented significant administrative reforms and promoted arts and architecture, leading to a flourishing of culture during his reign. The construction of the Topkapi Palace and the Fatih Mosque were notable achievements of the period. Died in 1481 and left a lasting legacy in Ottoman history.
Continue ReadingRichard Helms
Director of Central Intelligence
Born
March 30th, 1913 112 years ago
Died
2002 23 years ago — 89 years old
Served as the 8th Director of Central Intelligence from 1966 to 1973, overseeing the Central Intelligence Agency during a period marked by significant geopolitical tension and covert operations. Prior military service included roles in World War II and the Korean War. As a diplomat, contributed to U.S. intelligence operations and policy formulation throughout the Cold War, reinforcing the agency's role in national security.
Continue ReadingOther People Who Died on September 21st
Ivana Brlić-Mažuranić
Croatian author; Wizard of the Sava
Born
April 18th, 1874 151 years ago
Died
September 21st, 1938 87 years ago — 64 years old
An influential Croatian author and poet, contributed significantly to children's literature. Published works included fairy tales and novels that integrated Slavic folklore with contemporary themes. Achieved prominence with the book 'Nevaljaša,' which gained recognition across Europe. Later works continued to explore themes of childhood and dreams, establishing a distinctive voice in Croatian literature.
Continue ReadingArthur Ashkin
Physicist and Nobel Prize laureate
Born
September 2nd, 1922 103 years ago
Died
September 21st, 2020 5 years ago — 98 years old
This individual was an American physicist whose research significantly advanced the field of optical tweezers. Contributions to the understanding of laser physics led to the development of techniques that manipulate small particles with light. Work at Bell Labs facilitated breakthroughs in optical manipulation, impacting areas ranging from biology to materials science. The Nobel Prize in Physics was awarded in 2018 for achievements in this innovative domain.
Continue ReadingTrần Đại Quang
President of Vietnam
Born
1956 69 years ago
Died
September 21st, 2018 7 years ago — 62 years old
Served as the President of Vietnam from 2016 until death in 2018. Held a prominent role in the Communist Party of Vietnam and focused on anti-corruption initiatives, economic reforms, and modernization of the national defense system. Also served as Minister of Public Security prior to presidency, enhancing law enforcement and internal security protocols in the country. Participated in numerous international forums representing Vietnam.
Continue ReadingWilliam of Kilkenny
Lord Chancellor of England
Died
September 21st, 1256 769 years ago — None years old
Served as Lord Chancellor from 1251 until death in 1256. His tenure was marked by involvement in significant legal and administrative reforms within the English government. Acted as a key advisor during a period of political tension, particularly involving the monarchy and the barons. Contributed to the establishment of legal frameworks that influenced future governance.
Continue ReadingMercury Morris
American football player with Dolphins
Born
January 5th, 1947 78 years ago
Died
September 21st, 2024 1 years ago — 77 years old
Played as a running back in American football, primarily with the Miami Dolphins from 1969 to 1975. Contributed to the Dolphins' perfect season in 1972, which culminated in winning Super Bowl VII. Also participated in Super Bowl VIII, helping secure another championship for the team. Recognized for his speed and agility on the field.
Continue ReadingHarl H. Haas
American lawyer and politician
Born
1932 93 years ago
Died
September 21st, 2013 12 years ago — 81 years old
A lawyer and jurist who served in various political roles, including as a member of the West Virginia House of Delegates. Contributed to legal reforms and served on multiple judicial committees during a career that spanned several decades. Held positions with influence in shaping local and state laws, focusing on areas such as civil rights and public service. Engagement in politics included participation in significant legislative initiatives.
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