This document discusses various topics related to philosophy, science, and the origin of the universe. It examines perspectives such as materialism, idealism, and the Big Bang theory. It also covers evolutionary theories and discusses evidence for and against theories like natural selection. Additionally, the document analyzes concepts in physics including Einstein's theory of relativity and explores views on the origins of life and intelligent design.
This document provides background on the origins and history of astrobiology and exobiology at NASA. It discusses how these fields emerged from ancient human curiosity about life in the universe. Key events included Epicurus proposing the possibility of life on other worlds in 300 BCE and Galileo's telescope observations of Jupiter's moons in 1610, which helped establish that planets could host satellites. The fields grew in the 1920s as scientists like Oparin and Haldane theorized how life began on Earth and may arise elsewhere. The document serves as the first issue in a graphic history series commemorating 50 years of astrobiology at NASA.
Phil. trans. r. soc. a 2011-dominik-499-507n_day50
This document summarizes a discussion meeting about detecting extra-terrestrial life and its consequences. It notes that astronomers can now detect planets around other stars where life may exist, and living generations may see signatures of life detected. If life is found elsewhere, it would fundamentally change how humanity understands itself. The meeting addressed not just scientific issues but also societal impacts, covering topics like the origins and evolution of life, searching for extra-solar planets and extra-terrestrial intelligence, and the implications for science and society. It highlights our current lack of knowledge about life beyond Earth and the challenges in defining it and identifying unambiguous signatures.
Venetia Burney, an 11-year-old girl, suggested the name "Pluto" for the newly discovered planet; Nicolaus Copernicus' book started modern astronomy by proposing that Earth and other planets revolve around the Sun; the Cassini-Huygens mission objectives included determining the composition of Saturn's rings and moons and studying Saturn's atmosphere and Titan's surface.
The document discusses the history of paleontology and robotics, and how recent advances in these fields have led to the creation of robotic dinosaurs. It describes Peter Dilworth's creation of Troody, the first robotic dinosaur in the US, which took 5 years to develop and could walk thanks to spring-like joints and force control sensors. It also discusses how 3D printing is now allowing scientists to create accurate models of dinosaur bones to better understand dinosaur anatomy and movement, with the goal of developing robotic dinosaur limbs. The document concludes by describing a theme park called Field Station: Dinosaurs that houses dozens of life-size robotic dinosaur species in a natural setting.
The document contains information about Mr Md Moshfaqur Rahman and the UN-CMCoord eCourse: Working in Complex Emergencies. It appears to be related to an online course about working in complex emergencies run by the United Nations. The document does not provide much additional context beyond the name and course title.
This document discusses internal forces, shear forces, and bending moments in structural members. It provides examples of calculating these forces at various cross-sections of beams and frames. The objectives are to determine the loading acting within a member to ensure it can resist external forces, and to analyze shear and moment diagrams. Various types of beams and supports are defined. The procedure for drawing shear and moment diagrams is outlined.
Md. Moshfaqur Rahman participated in the Business Analysis 101 course from January to March 2015 taught by Michael Boyle, according to a certificate from iversity.org, an online education platform that enables global learners to study with professors worldwide. The certificate does not confer any degree, grades, or credit, and the student's identity was not verified.
This document contains the resume of Muhammad Farhan Mehmood, who currently works as an Accounts Officer at Lahore Electric Supply Company (LESCO/WAPDA) in Lahore, Pakistan. It lists his education, skills, areas of experience, and work history. Farhan has a Bachelor of Commerce degree from the University of Punjab and over 8 years of experience in accounts and finance roles at LESCO, including implementing Oracle Financial software and preparing monthly profit/loss statements and balance sheets. His objective is to pursue a challenging career in accounts and finance where he can continue developing his professional skills.
This document provides background on the origins and history of astrobiology and exobiology at NASA. It discusses how these fields emerged from ancient human curiosity about life in the universe. Key events included Epicurus proposing the possibility of life on other worlds in 300 BCE and Galileo's telescope observations of Jupiter's moons in 1610, which helped establish that planets could host satellites. The fields grew in the 1920s as scientists like Oparin and Haldane theorized how life began on Earth and may arise elsewhere. The document serves as the first issue in a graphic history series commemorating 50 years of astrobiology at NASA.
Phil. trans. r. soc. a 2011-dominik-499-507n_day50
This document summarizes a discussion meeting about detecting extra-terrestrial life and its consequences. It notes that astronomers can now detect planets around other stars where life may exist, and living generations may see signatures of life detected. If life is found elsewhere, it would fundamentally change how humanity understands itself. The meeting addressed not just scientific issues but also societal impacts, covering topics like the origins and evolution of life, searching for extra-solar planets and extra-terrestrial intelligence, and the implications for science and society. It highlights our current lack of knowledge about life beyond Earth and the challenges in defining it and identifying unambiguous signatures.
Venetia Burney, an 11-year-old girl, suggested the name "Pluto" for the newly discovered planet; Nicolaus Copernicus' book started modern astronomy by proposing that Earth and other planets revolve around the Sun; the Cassini-Huygens mission objectives included determining the composition of Saturn's rings and moons and studying Saturn's atmosphere and Titan's surface.
The document discusses the history of paleontology and robotics, and how recent advances in these fields have led to the creation of robotic dinosaurs. It describes Peter Dilworth's creation of Troody, the first robotic dinosaur in the US, which took 5 years to develop and could walk thanks to spring-like joints and force control sensors. It also discusses how 3D printing is now allowing scientists to create accurate models of dinosaur bones to better understand dinosaur anatomy and movement, with the goal of developing robotic dinosaur limbs. The document concludes by describing a theme park called Field Station: Dinosaurs that houses dozens of life-size robotic dinosaur species in a natural setting.
The document contains information about Mr Md Moshfaqur Rahman and the UN-CMCoord eCourse: Working in Complex Emergencies. It appears to be related to an online course about working in complex emergencies run by the United Nations. The document does not provide much additional context beyond the name and course title.
This document discusses internal forces, shear forces, and bending moments in structural members. It provides examples of calculating these forces at various cross-sections of beams and frames. The objectives are to determine the loading acting within a member to ensure it can resist external forces, and to analyze shear and moment diagrams. Various types of beams and supports are defined. The procedure for drawing shear and moment diagrams is outlined.
Md. Moshfaqur Rahman participated in the Business Analysis 101 course from January to March 2015 taught by Michael Boyle, according to a certificate from iversity.org, an online education platform that enables global learners to study with professors worldwide. The certificate does not confer any degree, grades, or credit, and the student's identity was not verified.
This document contains the resume of Muhammad Farhan Mehmood, who currently works as an Accounts Officer at Lahore Electric Supply Company (LESCO/WAPDA) in Lahore, Pakistan. It lists his education, skills, areas of experience, and work history. Farhan has a Bachelor of Commerce degree from the University of Punjab and over 8 years of experience in accounts and finance roles at LESCO, including implementing Oracle Financial software and preparing monthly profit/loss statements and balance sheets. His objective is to pursue a challenging career in accounts and finance where he can continue developing his professional skills.
This document appears to be a collection of notes and references on various topics related to science, philosophy, and religion. It includes over 260 numbered citations and references on subjects like evolution, physics, earth science, history of thought, and religion. The document does not provide any overarching analysis or conclusions and seems to be assembling source material from various fields rather than presenting a coherent essay or argument.
The creation of the universe/BIG BANG ENGLISHbabylonboss
The document discusses the Big Bang theory and how it provides evidence for the creation of the universe. It describes how the Big Bang theory emerged as the prevailing scientific explanation for the origin and expansion of the universe. The theory posits that approximately 13.8 billion years ago, the entire mass and space of the known universe was contained in a single point, which expanded rapidly in an event known as the Big Bang. The document argues that the emergence of such an ordered, finely-tuned universe following an event like the Big Bang implies supernatural creation by an intelligent Creator, which it identifies as Allah. It asserts that the Big Bang disproved earlier materialist theories of an eternal, uncreated universe and instead showed the universe was brought
Astrobiology Comic (Issue 1)για παιδιά Γυμνασίου.pdfΜαυρουδης Μακης
This document provides a summary of the history of exobiology and astrobiology at NASA. It discusses how the fields have evolved over the past 50 years from early speculation about life on other planets to the establishment of NASA's Exobiology program in 1960 and the expanded Astrobiology Program in the 1990s. The summary also highlights some of the key figures and experiments that helped shape our understanding of the potential for life elsewhere, such as the Miller-Urey experiment which demonstrated how organic molecules could form in conditions similar to the early Earth.
The document profiles several famous scientists throughout history including Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, and Leonardo da Vinci. It provides brief biographies of each scientist, highlighting their most important scientific works and contributions to fields like physics, astronomy, mathematics, engineering, and biology. Key accomplishments mentioned include Einstein's theory of relativity, Newton's laws of motion, Galileo's astronomical observations, Hawking's work on black holes and cosmology, Tesla's inventions related to electricity, Darwin's theory of evolution by natural selection, Archimedes' contributions to geometry and calculations, Curie's pioneering research on radioactivity, and da Vin
G0321 Lecture 1 history of scientific thoughtKelvin Ooi
This document provides a timeline of scientific thought from ancient Sumerian mathematics to modern developments in fields like quantum mechanics and neuroscience. It outlines many important contributions throughout history, including Euclid establishing axiomatic science, Copernicus proposing the heliocentric model, Newton's laws of motion, Darwin's theory of evolution by natural selection, Einstein's theories of relativity, and the development of quantum mechanics in the early 20th century. The timeline shows the progression of scientific understanding across disciplines and civilizations over thousands of years.
The document summarizes information on 10 famous scientists: Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, Leonardo da Vinci, and their contributions to fields like physics, astronomy, mathematics, biology, and engineering. It provides brief biographies of 2-3 sentences for each scientist extracted from their Wikipedia pages.
Astrobiology is an emerging interdisciplinary field that uses principles from astronomy, biology, geology, and other related sciences to investigate the potential existence of life in the universe. It studies the origins and evolution of life on Earth to better understand where and how life may develop and survive elsewhere. Key events in the development of astrobiology include the launch of Sputnik sparking interest in space exploration during the Cold War, and the establishment of early NASA exobiology groups in the 1960s led by scientists like Carl Sagan. Current astrobiology research explores the potential habitability of other planets and moons both within our solar system and beyond.
New Sciences and Humanities, a PresentationWennie Wu
Modernization” was once conflated with “Westernization”. It was believed that from Science to Humanity, all would be clearly known with western methodologies.
Later discoveries have challenged the fundamentals of that paradigm. We came to realize uncertainty, probability, indeterminism, incompleteness of science and humanity.
The views of scientists such as: Newton, Einstein, Feynman, Prigogine, Hawking, etc., as well as views of politicians, writers, artists, will be discussed. For example:
Prigogine, a Nobel laureate 1977, was inspired by Chinese views of the nature.
Bill Clinton and Tony Blair advocated “the Third way”, which echoes the Mid-way (Centrism) that is a major theme by Confucius.
The works and lives of Lu, Xun, Eileen Chang, Kenneth Pai, Ang Lee, will be briefed to illustrate the environmental impact and transcendence from modernization to this new era of globalization.
This document provides brief biographies of important figures in earth sciences, physics, chemistry, biology and other fields, describing their major discoveries and contributions. Some of the scientists mentioned are Benjamin Franklin, George Hadley, James Hutton, Christian Sprengel, Thomas Malthus, Alessandro Volta, Hans Christian Orsted, Michael Faraday, James Clerk Maxwell, William Herschel, William Roentgen, Thomas Young, Christian Doppler, John Dalton, Jons Jacob Berzelius, Louis Pasteur, August Kekule, Dmitri Mendeleev, Mary Anning, Richard Owen, Louis Agassiz, Alexander von Humboldt, Alfred Russel Wallace, Thomas Huxley, Greg
The document discusses the scientific evidence for the Big Bang theory of the origin and evolution of the universe. It describes how early 20th century observations by Edwin Hubble showed that galaxies are moving away from each other, indicating an expanding universe. This supported theories by Einstein and Lemaître that the universe originated from a single point and has been expanding ever since. Later discoveries, such as the cosmic microwave background radiation, provided further evidence that the universe began in a massive explosion around 13.8 billion years ago known as the Big Bang.
1. The document discusses theories about the nature of reality and perception, including materialism, idealism, and semi-materialism. It explores how perceptions are formed through the senses and whether there is an objective external world or if reality is just perceptions and imagination.
2. The document then discusses theories of evolution and its difficulties, including problems with the fossil record and lack of transitional forms. It explores criticisms of Darwinism and examines evidence supporting intelligent design.
3. In concluding paragraphs, the document notes debates around scientific theories being treated as final truths and reluctance to fund science if answers are not produced. It provides citations for its discussions.
Lecture 5 Darwin Vs. God Revised With Margins Finallasierrauniv
This document contains summaries and excerpts from various scientists discussing topics related to evolution, origins of life, extraterrestrial life, intelligent design, and criticisms of naturalistic explanations. It references works from Richard Dawkins, Carl Sagan, George Wald, Michael Behe, and others on these interconnected subjects.
Origin of Life: by Chance or by Design?Tauqeer Ahmad
The document discusses the debate around whether life originated by chance or by design. It provides background on early theories from the 1930s proposing that life arose spontaneously through natural processes. It also summarizes key experiments, like Stanley Miller's 1953 experiment producing amino acids from simple gases. However, it notes that creating functional proteins randomly is overwhelmingly improbable. While some support for spontaneous abiogenesis came from early Mars missions, more recent data suggests the early Earth environment may not have been as reducing as previously believed. The document questions whether random reactions alone can explain the origin of life, given the huge amount of information stored in biological molecules, and suggests a super intelligence may be the best explanation.
1. Why controversies? Learning to be constructivistINRIA - ENS Lyon
1) The document discusses the history of perspectives on scientific controversies from positivism to constructivism. Positivism viewed science as objective and able to resolve controversies, while constructivism sees controversies as inherent to science due to its social nature.
2) It examines various sociological theories of scientific knowledge including the strong programme, laboratory studies, and the idea of scientific facts as constructed through networks of heterogeneous actors.
3) Controversies are presented as opportunities to better understand how scientific knowledge is constructed through exploring unexpected associations, proliferating issues, endless discussions and conflicts between various stakeholders.
Albert Einstein was a German-born physicist and inventor who developed the theory of relativity and E=mc2 equation. He was awarded the Nobel Prize in Physics in 1921. Einstein is considered one of the most influential scientists of the 20th century. He was passionate about physics from a young age and devoted his life to scientific study and discovery despite challenges with the educational system and his careers. Einstein's theories revolutionized how we understand space, time, mass, and energy and transformed modern physics.
Unmasking the Hijackers of Science - Dr. Norman Geisler (by Intelligent Faith...godknt777
How did the modern scientific enterprise get started?
Has there been a philosophical "paradigm shift" in the scientific establishment? What was it?
What do the greatest and most recent scientific discoveries of physics, cosmology, microbiology, and information science indicate about reality?
The britannica guide to relativity and quantum mechanics (physics explained) أحمد عبد القادر
This document provides an introduction to the key concepts in relativity and quantum mechanics. It summarizes that relativity was developed to explain the constant speed of light, with Einstein's special theory published in 1905 and his general theory in 1915. Quantum mechanics arose from Max Planck's work on blackbody radiation in 1900. The introduction outlines some of the unusual predictions of both theories, such as time dilation, curved spacetime, wave-particle duality of matter, and Heisenberg's uncertainty principle. It also notes the theories have been confirmed experimentally and transformed fields like cosmology, particle physics, and technology.
Social and cultural anthropology_ a very short introduction -- Monaghan, John...FaizAbdelhamid1
Anthropology is the study of human beings and human societies. It seeks to understand what makes humans unique, how social groups are formed and function, and the nature of core human institutions and activities like belief systems, economic exchange, and identity. Using vivid examples from their own fieldwork, the authors provide a concise yet accessible introduction to key questions and insights from anthropology.
The document discusses arguments for and against the origins of life from a naturalistic perspective versus special creation. It covers topics like the Miller-Urey experiment on the formation of amino acids, objections to the conclusions drawn from that experiment, the improbability of life arising from random processes, and experiments by Redi and Pasteur disproving the theory of spontaneous generation. The overall discussion centers around whether life could reasonably be explained through natural processes and evolution or requires an intelligent cause.
This document appears to be a collection of notes and references on various topics related to science, philosophy, and religion. It includes over 260 numbered citations and references on subjects like evolution, physics, earth science, history of thought, and religion. The document does not provide any overarching analysis or conclusions and seems to be assembling source material from various fields rather than presenting a coherent essay or argument.
The creation of the universe/BIG BANG ENGLISHbabylonboss
The document discusses the Big Bang theory and how it provides evidence for the creation of the universe. It describes how the Big Bang theory emerged as the prevailing scientific explanation for the origin and expansion of the universe. The theory posits that approximately 13.8 billion years ago, the entire mass and space of the known universe was contained in a single point, which expanded rapidly in an event known as the Big Bang. The document argues that the emergence of such an ordered, finely-tuned universe following an event like the Big Bang implies supernatural creation by an intelligent Creator, which it identifies as Allah. It asserts that the Big Bang disproved earlier materialist theories of an eternal, uncreated universe and instead showed the universe was brought
Astrobiology Comic (Issue 1)για παιδιά Γυμνασίου.pdfΜαυρουδης Μακης
This document provides a summary of the history of exobiology and astrobiology at NASA. It discusses how the fields have evolved over the past 50 years from early speculation about life on other planets to the establishment of NASA's Exobiology program in 1960 and the expanded Astrobiology Program in the 1990s. The summary also highlights some of the key figures and experiments that helped shape our understanding of the potential for life elsewhere, such as the Miller-Urey experiment which demonstrated how organic molecules could form in conditions similar to the early Earth.
The document profiles several famous scientists throughout history including Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, and Leonardo da Vinci. It provides brief biographies of each scientist, highlighting their most important scientific works and contributions to fields like physics, astronomy, mathematics, engineering, and biology. Key accomplishments mentioned include Einstein's theory of relativity, Newton's laws of motion, Galileo's astronomical observations, Hawking's work on black holes and cosmology, Tesla's inventions related to electricity, Darwin's theory of evolution by natural selection, Archimedes' contributions to geometry and calculations, Curie's pioneering research on radioactivity, and da Vin
G0321 Lecture 1 history of scientific thoughtKelvin Ooi
This document provides a timeline of scientific thought from ancient Sumerian mathematics to modern developments in fields like quantum mechanics and neuroscience. It outlines many important contributions throughout history, including Euclid establishing axiomatic science, Copernicus proposing the heliocentric model, Newton's laws of motion, Darwin's theory of evolution by natural selection, Einstein's theories of relativity, and the development of quantum mechanics in the early 20th century. The timeline shows the progression of scientific understanding across disciplines and civilizations over thousands of years.
The document summarizes information on 10 famous scientists: Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, Leonardo da Vinci, and their contributions to fields like physics, astronomy, mathematics, biology, and engineering. It provides brief biographies of 2-3 sentences for each scientist extracted from their Wikipedia pages.
Astrobiology is an emerging interdisciplinary field that uses principles from astronomy, biology, geology, and other related sciences to investigate the potential existence of life in the universe. It studies the origins and evolution of life on Earth to better understand where and how life may develop and survive elsewhere. Key events in the development of astrobiology include the launch of Sputnik sparking interest in space exploration during the Cold War, and the establishment of early NASA exobiology groups in the 1960s led by scientists like Carl Sagan. Current astrobiology research explores the potential habitability of other planets and moons both within our solar system and beyond.
New Sciences and Humanities, a PresentationWennie Wu
Modernization” was once conflated with “Westernization”. It was believed that from Science to Humanity, all would be clearly known with western methodologies.
Later discoveries have challenged the fundamentals of that paradigm. We came to realize uncertainty, probability, indeterminism, incompleteness of science and humanity.
The views of scientists such as: Newton, Einstein, Feynman, Prigogine, Hawking, etc., as well as views of politicians, writers, artists, will be discussed. For example:
Prigogine, a Nobel laureate 1977, was inspired by Chinese views of the nature.
Bill Clinton and Tony Blair advocated “the Third way”, which echoes the Mid-way (Centrism) that is a major theme by Confucius.
The works and lives of Lu, Xun, Eileen Chang, Kenneth Pai, Ang Lee, will be briefed to illustrate the environmental impact and transcendence from modernization to this new era of globalization.
This document provides brief biographies of important figures in earth sciences, physics, chemistry, biology and other fields, describing their major discoveries and contributions. Some of the scientists mentioned are Benjamin Franklin, George Hadley, James Hutton, Christian Sprengel, Thomas Malthus, Alessandro Volta, Hans Christian Orsted, Michael Faraday, James Clerk Maxwell, William Herschel, William Roentgen, Thomas Young, Christian Doppler, John Dalton, Jons Jacob Berzelius, Louis Pasteur, August Kekule, Dmitri Mendeleev, Mary Anning, Richard Owen, Louis Agassiz, Alexander von Humboldt, Alfred Russel Wallace, Thomas Huxley, Greg
The document discusses the scientific evidence for the Big Bang theory of the origin and evolution of the universe. It describes how early 20th century observations by Edwin Hubble showed that galaxies are moving away from each other, indicating an expanding universe. This supported theories by Einstein and Lemaître that the universe originated from a single point and has been expanding ever since. Later discoveries, such as the cosmic microwave background radiation, provided further evidence that the universe began in a massive explosion around 13.8 billion years ago known as the Big Bang.
1. The document discusses theories about the nature of reality and perception, including materialism, idealism, and semi-materialism. It explores how perceptions are formed through the senses and whether there is an objective external world or if reality is just perceptions and imagination.
2. The document then discusses theories of evolution and its difficulties, including problems with the fossil record and lack of transitional forms. It explores criticisms of Darwinism and examines evidence supporting intelligent design.
3. In concluding paragraphs, the document notes debates around scientific theories being treated as final truths and reluctance to fund science if answers are not produced. It provides citations for its discussions.
Lecture 5 Darwin Vs. God Revised With Margins Finallasierrauniv
This document contains summaries and excerpts from various scientists discussing topics related to evolution, origins of life, extraterrestrial life, intelligent design, and criticisms of naturalistic explanations. It references works from Richard Dawkins, Carl Sagan, George Wald, Michael Behe, and others on these interconnected subjects.
Origin of Life: by Chance or by Design?Tauqeer Ahmad
The document discusses the debate around whether life originated by chance or by design. It provides background on early theories from the 1930s proposing that life arose spontaneously through natural processes. It also summarizes key experiments, like Stanley Miller's 1953 experiment producing amino acids from simple gases. However, it notes that creating functional proteins randomly is overwhelmingly improbable. While some support for spontaneous abiogenesis came from early Mars missions, more recent data suggests the early Earth environment may not have been as reducing as previously believed. The document questions whether random reactions alone can explain the origin of life, given the huge amount of information stored in biological molecules, and suggests a super intelligence may be the best explanation.
1. Why controversies? Learning to be constructivistINRIA - ENS Lyon
1) The document discusses the history of perspectives on scientific controversies from positivism to constructivism. Positivism viewed science as objective and able to resolve controversies, while constructivism sees controversies as inherent to science due to its social nature.
2) It examines various sociological theories of scientific knowledge including the strong programme, laboratory studies, and the idea of scientific facts as constructed through networks of heterogeneous actors.
3) Controversies are presented as opportunities to better understand how scientific knowledge is constructed through exploring unexpected associations, proliferating issues, endless discussions and conflicts between various stakeholders.
Albert Einstein was a German-born physicist and inventor who developed the theory of relativity and E=mc2 equation. He was awarded the Nobel Prize in Physics in 1921. Einstein is considered one of the most influential scientists of the 20th century. He was passionate about physics from a young age and devoted his life to scientific study and discovery despite challenges with the educational system and his careers. Einstein's theories revolutionized how we understand space, time, mass, and energy and transformed modern physics.
Unmasking the Hijackers of Science - Dr. Norman Geisler (by Intelligent Faith...godknt777
How did the modern scientific enterprise get started?
Has there been a philosophical "paradigm shift" in the scientific establishment? What was it?
What do the greatest and most recent scientific discoveries of physics, cosmology, microbiology, and information science indicate about reality?
The britannica guide to relativity and quantum mechanics (physics explained) أحمد عبد القادر
This document provides an introduction to the key concepts in relativity and quantum mechanics. It summarizes that relativity was developed to explain the constant speed of light, with Einstein's special theory published in 1905 and his general theory in 1915. Quantum mechanics arose from Max Planck's work on blackbody radiation in 1900. The introduction outlines some of the unusual predictions of both theories, such as time dilation, curved spacetime, wave-particle duality of matter, and Heisenberg's uncertainty principle. It also notes the theories have been confirmed experimentally and transformed fields like cosmology, particle physics, and technology.
Social and cultural anthropology_ a very short introduction -- Monaghan, John...FaizAbdelhamid1
Anthropology is the study of human beings and human societies. It seeks to understand what makes humans unique, how social groups are formed and function, and the nature of core human institutions and activities like belief systems, economic exchange, and identity. Using vivid examples from their own fieldwork, the authors provide a concise yet accessible introduction to key questions and insights from anthropology.
The document discusses arguments for and against the origins of life from a naturalistic perspective versus special creation. It covers topics like the Miller-Urey experiment on the formation of amino acids, objections to the conclusions drawn from that experiment, the improbability of life arising from random processes, and experiments by Redi and Pasteur disproving the theory of spontaneous generation. The overall discussion centers around whether life could reasonably be explained through natural processes and evolution or requires an intelligent cause.
Similar to واقعیت سرنوشت , و ابدیت است. فارسی (Persian) (20)
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
The cost of acquiring information by natural selectionCarl Bergstrom
This is a short talk that I gave at the Banff International Research Station workshop on Modeling and Theory in Population Biology. The idea is to try to understand how the burden of natural selection relates to the amount of information that selection puts into the genome.
It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
Travis Hills of MN is Making Clean Water Accessible to All Through High Flux ...Travis Hills MN
By harnessing the power of High Flux Vacuum Membrane Distillation, Travis Hills from MN envisions a future where clean and safe drinking water is accessible to all, regardless of geographical location or economic status.
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDSSérgio Sacani
The pathway(s) to seeding the massive black holes (MBHs) that exist at the heart of galaxies in the present and distant Universe remains an unsolved problem. Here we categorise, describe and quantitatively discuss the formation pathways of both light and heavy seeds. We emphasise that the most recent computational models suggest that rather than a bimodal-like mass spectrum between light and heavy seeds with light at one end and heavy at the other that instead a continuum exists. Light seeds being more ubiquitous and the heavier seeds becoming less and less abundant due the rarer environmental conditions required for their formation. We therefore examine the different mechanisms that give rise to different seed mass spectrums. We show how and why the mechanisms that produce the heaviest seeds are also among the rarest events in the Universe and are hence extremely unlikely to be the seeds for the vast majority of the MBH population. We quantify, within the limits of the current large uncertainties in the seeding processes, the expected number densities of the seed mass spectrum. We argue that light seeds must be at least 103 to 105 times more numerous than heavy seeds to explain the MBH population as a whole. Based on our current understanding of the seed population this makes heavy seeds (Mseed > 103 M⊙) a significantly more likely pathway given that heavy seeds have an abundance pattern than is close to and likely in excess of 10−4 compared to light seeds. Finally, we examine the current state-of-the-art in numerical calculations and recent observations and plot a path forward for near-future advances in both domains.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...Sérgio Sacani
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...Sérgio Sacani
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...Leonel Morgado
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
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