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Takuo Aoyagi
was a Japanese engineer, known for his work leading to the modern pulse oximeter. Early life, education and career Aoyagi was born February 14, 1936, in Niigata Prefecture, Japan. His parents were Monshichi and Tatsu Aoyagi. His father was a mathematics teacher and his mother was a homemaker. Aoyagi received an undergraduate degree in electrical engineering from Niigata University in 1958. He then worked for a time for the scientific instrumentation company Shimadzu Corporation, before moving to the research division of the medical equipment company Nihon Kohden in 1971. Pulse oximetry An earlier oximeter had been invented by Glen Millikan, building on work by Karl von Vierordt, Karl Matthes, and others. Earl Wood and his PhD student J. E. Geraci made some improvements. These early devices were inaccurate and difficult to use. The main idea was to measure the difference in how blood absorbed red light versus infrared light. An obstacle was that the pulse of blood create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulse Oximeter
Pulse oximetry is a noninvasive method for monitoring blood oxygen saturation. Peripheral oxygen saturation (SpO2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (SaO2) from arterial blood gas analysis. A standard pulse oximeter passes two wavelengths of light through tissue to a photodetector. Taking advantage of the pulsate flow of arterial blood, it measures the change in absorbance over the course of a cardiac cycle, allowing it to determine the absorbance due to arterial blood alone, excluding unchanging absorbance due to venous blood, skin, bone, muscle, fat, and, in many cases, nail polish. The two wavelengths measure the quantities of bound (oxygenated) and unbound (non-oxygenated) hemoglobin, and from their ratio, the percentage of bound hemoglobin is computed. The most common approach is ''transmissive pulse oximetry''. In this approach, one side of a thin part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Health Organization
The World Health Organization (WHO) is a list of specialized agencies of the United Nations, specialized agency of the United Nations which coordinates responses to international public health issues and emergencies. It is headquartered in Geneva, Switzerland, and has 6 regional offices and 150 field offices worldwide. Only sovereign states are eligible to join, and it is the largest intergovernmental health organization at the international level. The WHO's purpose is to achieve the highest possible level of health for all the world's people, defining health as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity." The main functions of the World Health Organization include promoting the control of epidemic and endemic diseases; providing and improving the teaching and training in public health, the medical treatment of disease, and related matters; and promoting the establishment of international standards for biologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Electrical Engineers
Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspora, Japanese emigrants and their descendants around the world * Japanese citizens, nationals of Japan under Japanese nationality law ** Foreign-born Japanese, naturalized citizens of Japan * Japanese writing system, consisting of kanji and kana * Japanese cuisine, the food and food culture of Japan See also * List of Japanese people * * Japonica (other) * Japanese studies , sometimes known as Japanology in Europe, is a sub-field of area studies or East Asian studies involved in social sciences and humanities research on Japan. It incorporates fields such as the study of Japanese language, history, culture, litera ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Niigata Prefecture
The term "the people" refers to the public or common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independent sovereignty and therefore secession. Indeed, judge Ivor Jennings identified the inherent problems in the right of "peoples" to self-determination, as i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2020 Deaths
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked below. 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 Earlier years ''Deaths in years earlier than this can usually be found in the main articles of the years.'' See also * Lists of deaths by day * Deaths by year (category) {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1936 Births
Events January–February * January 20 – The Prince of Wales succeeds to the throne of the United Kingdom as King Edward VIII, following the death of his father, George V, at Sandringham House. * January 28 – Death and state funeral of George V, State funeral of George V of the United Kingdom. After a procession through London, he is buried at St George's Chapel, Windsor Castle. * February 4 – Radium E (bismuth-210) becomes the first radioactive element to be made synthetically. * February 6 – The 1936 Winter Olympics, IV Olympic Winter Games open in Garmisch-Partenkirchen, Germany. * February 10–February 19, 19 – Second Italo-Ethiopian War: Battle of Amba Aradam – Italian forces gain a decisive tactical victory, effectively neutralizing the army of the Ethiopian Empire. * February 16 – 1936 Spanish general election: The left-wing Popular Front (Spain), Popular Front coalition takes a majority. * February 26 – February 26 Incident (二・二六事件, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asian Scientist
''Asian Scientist'' is an English language science and technology magazine published in Singapore. History and profile ''Asian Scientist'' was launched as a blog in March 2011 by Juliana Chan. The blog's popularity eventually led to a partnership with the publishing house World Scientific Publishing, enabling Chan to turn ''Asian Scientist'' into a magazine and serve as its editor-in-chief. Based in Singapore, ''Asian Scientist'' is maintained by a team of professional science and medical journalists, with active contributors from the science, technology and medical communities. The magazine's launch reflects the growing demographic of scientists, engineers and doctors from Asia, and caters to this community with news stories that are both timely and of interest to them. According to the 2010 U.S. National Science Foundation Key Science and Engineering Indicators report, one-quarter of the world's publications are from Asia and one-third of all scientific researchers worldwide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asian Scientist 100
The Asian Scientist 100 is an annually published list of 100 prize-winning Asian researchers, academicians, innovators and business leaders from across the Asia-Pacific region and a range of scientific disciplines. Recipients "must have received a national or international prize in the preceding year for his or her research. Alternatively, he or she must have made a significant scientific discovery or provided leadership in academia or industry." The honor is bestowed by the English language science and technology magazine ''Asian Scientist ''Asian Scientist'' is an English language science and technology magazine published in Singapore. History and profile ''Asian Scientist'' was launched as a blog in March 2011 by Juliana Chan. The blog's popularity eventually led to a partnersh ...''. Laureates References External links Asian Scientist 100 {{DEFAULTSORT:Asian Scientist 100 Awards established in 2016 2016 establishments in Singapore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE Medal For Innovations In Healthcare Technology
Through its awards program, the Institute of Electrical and Electronics Engineers recognizes contributions that advance the fields of interest to the IEEE. For nearly a century, the IEEE Awards Program has paid tribute to technical professionals whose exceptional achievements and outstanding contributions have made a lasting impact on technology, society and the engineering profession. The IEEE Medals and IEEE Technical Field Awards are institution-level awards. They are considered more prestigious than IEEE Society level awards and are administered by IEEE Awards Board. Each year, the IEEE Board of Directors approved the winners of these prestigious medals and awards at their annual board meeting. An IEEE Honors Ceremony is organized and held in New York each year to present the medals and awards to the recipients. Funds for the awards program, other than those provided by corporate sponsors for some awards, are administered by the IEEE Foundation. IEEE Medals * IEEE top medal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emperor Of Japan
The emperor of Japan is the hereditary monarch and head of state of Japan. The emperor is defined by the Constitution of Japan as the symbol of the Japanese state and the unity of the Japanese people, his position deriving from "the will of the people with whom resides sovereign power". The Imperial Household Law governs the line of Succession to the Japanese throne, imperial succession. Pursuant to his constitutional role as a national symbol, and in accordance with rulings by the Supreme Court of Japan, the emperor is personally sovereign immunity, immune from prosecution. By virtue of his position as the head of the Imperial House of Japan, Imperial House, the emperor is also recognized as the head of the Shinto religion, which holds him to be the direct descendant of the sun goddess Amaterasu. According to tradition, the office of emperor was created in the 7th century BC, but the first historically verifiable emperors appear around the 5th or 6th centuries Anno Domini, AD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medal With Purple Ribbon
are medals awarded by the Emperor of Japan. They are awarded to individuals who have done meritorious deeds and also to those who have achieved excellence in their field of work. The Medals of Honor were established on December 7, 1881, and were first awarded the following year. Several expansions and amendments have been made since then. The medal design for all six types is the same, bearing the stylized characters on a gilt central disc surrounded by a silver ring of cherry blossoms on the obverse; only the colors of the ribbon differ. If for some reason an individual were to receive a second medal of the same ribbon colour, then a second medal is not issued, but rather a new bar is added to their current medal. The Medals of Honor are awarded twice each year, on April 29 (the birthday of Emperor Shōwa) and November 3 (the birthday of Emperor Meiji). Types Red ribbon First awarded in 1882. Awarded to individuals who have risked their own lives to save the lives of other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tokyo
The University of Tokyo (, abbreviated as in Japanese and UTokyo in English) is a public research university in Bunkyō, Tokyo, Japan. Founded in 1877 as the nation's first modern university by the merger of several pre-westernisation era institutions, its direct precursors include the '' Tenmongata'', founded in 1684, and the Shōheizaka Institute. Although established under its current name, the university was renamed in 1886 and was further retitled to distinguish it from other Imperial Universities established later. It served under this name until the official dissolution of the Empire of Japan in 1947, when it reverted to its original name. Today, the university consists of 10 faculties, 15 graduate schools, and 11 affiliated research institutes. As of 2023, it has a total of 13,974 undergraduate students and 14,258 graduate students. The majority of the university's educational and research facilities are concentrated within its three main Tokyo campuses: Hongō, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
