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Karl Vierordt
Karl von Vierordt (July 1, 1818 – November 22, 1884) was a German physiologist. Vierordt was born in Lahr, Baden. He studied at the universities of Berlin, Göttingen, Vienna, and Heidelberg, and began a practice in Karlsruhe in 1842. In 1849 he became a professor of theoretical medicine at the University of Tübingen, and in 1853 a professor of physiology. Vierordt developed techniques and tools for the monitoring of blood circulation. He is credited with the construction of an early "hemotachometer", an apparatus for monitoring the velocity of blood flow. In 1854, he created a device called a sphygmograph, a mechanism consisting of weights and levers used to estimate blood pressure, and considered to be a forerunner of the modern sphygmomanometer. One of his better known written works was a treatise on the arterial pulse, titled ''Die Lehre vom Arterienpuls in gesunden und kranken Zuständen''. Vierordt also made substantial contributions to the psychology of time percep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lahr
Lahr (officially Lahr/Schwarzwald since 30 September 1978) (); gsw, label=Low Alemannic, Lohr) is a town in western Baden-Württemberg, Germany, approximately 50 km north of Freiburg im Breisgau, 40 km southeast of Strasbourg, and 95 km southwest of Karlsruhe. It is the second largest city in Ortenau (district) after Offenburg, and serves as an intermediate economic centre for the cities and towns of Ettenheim, Friesenheim, Kappel-Grafenhausen, Kippenheim, Mahlberg, Meißenheim, Ringsheim, Rust, Schuttertal, Schwanau and Seelbach. The population of Lahr passed the 20,000 mark in the mid-1950s. When the new body of Municipal Law for Baden-Württemberg came into effect on April 1, 1956, the city was therefore immediately accorded ''Große Kreisstadt'' status. In addition, Lahr cooperates with the town of Kippenheim in administrative matters. Geography Lahr is located on the western edge of the Black Forest where the Schutter Valley merges with the Upper Rhine Rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circulatory System
The blood circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek ''kardia'' meaning ''heart'', and from Latin ''vascula'' meaning ''vessels''). The circulatory system has two divisions, a systemic circulation or circuit, and a pulmonary circulation or circuit. Some sources use the terms ''cardiovascular system'' and ''vascular system'' interchangeably with the ''circulatory system''. The network of blood vessels are the great vessels of the heart including large elastic arteries, and large veins; other arteries, smaller arterioles, capillaries that join with venules (small veins), and other veins. The Closed circulatory system, circulatory system is closed in vertebrates, which means that the blood never leaves the network of blood vessels. Some in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Psychologists
German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Germanic peoples (Roman times) * German language **any of the Germanic languages * German cuisine, traditional foods of Germany People * German (given name) * German (surname) * Germán, a Spanish name Places * German (parish), Isle of Man * German, Albania, or Gërmej * German, Bulgaria * German, Iran * German, North Macedonia * German, New York, U.S. * Agios Germanos, Greece Other uses * German (mythology), a South Slavic mythological being * Germans (band), a Canadian rock band * "German" (song), a 2019 song by No Money Enterprise * ''The German'', a 2008 short film * "The Germans", an episode of ''Fawlty Towers'' * ''The German'', a nickname for Congolese rebel André Kisase Ngandu See also * Germanic (other) * Germa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Physiologists
German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Germanic peoples (Roman times) * German language **any of the Germanic languages * German cuisine, traditional foods of Germany People * German (given name) * German (surname) * Germán, a Spanish name Places * German (parish), Isle of Man * German, Albania, or Gërmej * German, Bulgaria * German, Iran * German, North Macedonia * German, New York, U.S. * Agios Germanos, Greece Other uses * German (mythology), a South Slavic mythological being * Germans (band), a Canadian rock band * "German" (song), a 2019 song by No Money Enterprise * ''The German'', a 2008 short film * "The Germans", an episode of ''Fawlty Towers'' * ''The German'', a nickname for Congolese rebel André Kisase Ngandu See also * Germanic (other) * Germa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1884 Deaths
Events January–March * January 4 – The Fabian Society is founded in London. * January 5 – Gilbert and Sullivan's ''Princess Ida'' premières at the Savoy Theatre, London. * January 18 – Dr. William Price attempts to cremate his dead baby son, Iesu Grist, in Wales. Later tried and acquitted on the grounds that cremation is not contrary to English law, he is thus able to carry out the ceremony (the first in the United Kingdom in modern times) on March 14, setting a legal precedent. * February 1 – ''A New English Dictionary on historical principles, part 1'' (edited by James A. H. Murray), the first fascicle of what will become ''The Oxford English Dictionary'', is published in England. * February 5 – Derby County Football Club is founded in England. * March 13 – The siege of Khartoum, Sudan, begins (ends on January 26, 1885). * March 28 – Prince Leopold, the youngest son and the eighth child of Queen Victoria and Prin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1818 Births
Events January–March * January 1 ** Battle of Koregaon: Troops of the British East India Company score a decisive victory over the Maratha Empire. ** Mary Shelley's ''Frankenstein'' is published anonymously in London. * January 2 – The British Institution of Civil Engineers is founded. * January 3 (21:52 UTC) – Venus occults Jupiter. It is the last occultation of one planet by another before November 22, 2065. * January 6 – The Treaty of Mandeswar brings an end to the Third Anglo-Maratha War, ending the dominance of Marathas, and enhancing the power of the British East India Company, which controls territory occupied by 180 million Indians. * January 11 – Percy Bysshe Shelley's ''Ozymandias'' is published pseudonymously in London. * January 12 – The Dandy horse (''Laufmaschine'' bicycle) is invented by Karl Drais in Mannheim. * February 3 – Jeremiah Chubb is granted a British patent for the Chubb detector lock. * February 5 – Upon his death, K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Planck Institute For The History Of Science
The Max Planck Institute for the History of Science (German: Max-Planck-Institut für Wissenschaftsgeschichte) is a scientific research institute founded in March 1994. It is dedicated to addressing fundamental questions of the history of knowledge from the Neolithic era to the present day, and its researchers pursue a historical epistemology in their study of how new categories of thought, proof, and experience have emerged in interactions between the sciences and their ambient cultures. Organization The MPIWG comprises three departments and several independent research groups. The departments are: * "Structural Changes in Systems of Knowledge," directed by Jürgen Renn * "Knowledge Systems and Collective Life," directed bEtienne Benson* "Artifacts, Action, Knowledge," directed by Dagmar Schäfer Hans-Jörg Rheinberger, who headed Department III from 1995 to 2014, and Lorraine Daston, who headed Department II from 1995 to 2019, remain at the MPIWG as emerita. The Research Gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Laboratory
The online project Virtual Laboratory. Essays and Resources on the Experimentalization of Life, 1830-1930, located at the Max Planck Institute for the History of Science, is dedicated to research in the history of the experimentalization of life. The term experimentalization describes the interaction between the life sciences, the arts, architecture, media and technology within the experimental paradigm, ca. 1830 to 1930. The Virtual Laboratory is a platform that not only presents work on this topic but also acts as a research environment for new studies. History In 1977, the first version of the Virtual Laboratory was presented, titled Virtual Laboratory of Physiology. At this time, the main focus lay on the development of technological preconditions of physiological research in the 19th century. Therefore, a database with relevant texts and images was created. In 1998, the concept still used today was created after a series of modifications, followed by the publication of a cd-ROM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vierordt's Law
Karl von Vierordt (1868) was the first to record a law of time perception The study of time perception or chronoception is a field within psychology, cognitive linguistics and neuroscience that refers to the subjective experience, or sense, of time, which is measured by someone's own perception of the duration of the ind ... which relates perceived duration to actual duration over different interval magnitudes, and according to task complexity. Vierordt's law is "a robust phenomenon in time estimation research that has been observed with different time estimation methods".Fortin, Claudette; and Rousseau, Robert; (1998) ''Interference from short-term memory processing on encoding and reproducing brief durations'', Psychological Research, 61, pp. 269-276 It states that, retrospectively, "short" intervals of time tend to be overestimated, and "long" intervals of time tend to be underestimated. The other major paradigm of time estimation methodology measures time prospectively. Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Perception
The study of time perception or chronoception is a field within psychology, cognitive linguistics and neuroscience that refers to the subjective experience, or sense, of time, which is measured by someone's own perception of the duration of the indefinite and unfolding of events. The perceived time interval between two successive events is referred to as perceived duration. Though directly experiencing or understanding another person's perception of time is not possible, perception can be objectively studied and inference, inferred through a number of scientific experiments. Some temporal illusions help to expose the underlying neural mechanisms of time perception. Pioneering work, emphasizing species-specific differences, was conducted by Karl Ernst von Baer. Theories Time perception is typically categorized in three distinct ranges, because different ranges of duration are processed in different areas of the brain: * Sub-second timing or millisecond timing * Interval timing o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphygmomanometer
A sphygmomanometer ( ), a blood pressure monitor, or blood pressure gauge, is a device used to measure blood pressure, composed of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, and a mercury (element), mercury or Pressure measurement#Aneroid, aneroid manometer to measure the pressure. Manual sphygmomanometers are used with a stethoscope when using the Auscultation, auscultatory technique. A sphygmomanometer consists of an inflatable cuff, a measuring unit (the Pressure measurement#Liquid column (manometer), mercury manometer, or aneroid gauge), and a mechanism for inflation which may be a manually operated bulb and valve or a pump operated electrically. Types Both manual and digital meters are currently employed, with different trade-offs in accuracy versus convenience. Manual A stethoscope is required for auscultation (#A stethoscope is required for auscultation (see below), see below). Manual meters are best used by trai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blood Pressure
Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood through the circulatory system. When used without qualification, the term "blood pressure" refers to the pressure in the large arteries. Blood pressure is usually expressed in terms of the systolic pressure (maximum pressure during one heartbeat) over diastolic pressure (minimum pressure between two heartbeats) in the cardiac cycle. It is measured in millimeters of mercury ( mmHg) above the surrounding atmospheric pressure. Blood pressure is one of the vital signs—together with respiratory rate, heart rate, oxygen saturation, and body temperature—that healthcare professionals use in evaluating a patient's health. Normal resting blood pressure, in an adult is approximately systolic over diastolic, denoted as "120/80 mmHg". Globally, the average blood pressure, age standardized, has remained about the same since 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
