Platonischer Körper Die Platonischen Körper sind konvex. In jeder Ecke des Körpers treffen jeweils gleich viele gleich lange Kanten zusammen, an jeder Kante treffen sich zwei kongruente Flächen, und jede Fläche hat gleich viele Ecken. Es ist also nicht möglich, irgendwelche zwei Ecken, Kanten und Flächen aufgrund von Beziehungen zu anderen Punkten des Polyeders voneinander zu unterscheiden. Verzichtet man auf die Ununterscheidbarkeit der Flächen und Kanten, spricht man von archimedischen Körpern. Alternative Definitionen[Bearbeiten] Man betrachte die Symmetrieabbildungen, welche einen Polyeder mittels Drehungen, Spiegelungen und Translationen auf sich selbst abbilden. Grundlegende Eigenschaften[Bearbeiten] Platonische Körper haben folgende Eigenschaften:[3] Typen[Bearbeiten] Anzahl[Bearbeiten] Für jede Polyederecke ist die Summe der Innenwinkel aller angrenzenden Flächen kleiner als 360°. Damit ist bewiesen, dass es nicht mehr als fünf Platonische Körper geben kann. Dualität[Bearbeiten] Symmetrie[Bearbeiten] und .
Forty Portraits in Forty Years Text by SUSAN MINOT Nicholas Nixon was visiting his wife’s family when, “on a whim,” he said, he asked her and her three sisters if he could take their picture. It was summer 1975, and a black-and-white photograph of four young women — elbows casually attenuated, in summer shirts and pants, standing pale and luminous against a velvety background of trees and lawn — was the result. Who are these sisters? Whenever a woman is photographed, the issue of her vanity is inevitably raised, but Nixon has finessed this with his choice of natural light, casual manner and unfussy preparation. Throughout this series, we watch these women age, undergoing life’s most humbling experience. It is the endurance of sisterhood in particular. The deepening of the sisters’ relationships extends to the one with Nixon. As we come to the last pictures, we feel the final inevitability that, as Nixon says, “Everyone won’t be here forever.”
25 Critical Thinking Strategies For The Modern Learner Critical thinking is the engine of learning. Within this complex process or so many other relevant themes that contribute to learning: creativity, analysis, evaluation, innovation, application, and scores of other verbs from various learning taxonomies. So the following infographic from Mentoring Minds is immediately relevant to all educators, and students as well. It’s a bit of a mash of Habits of Mind, various 21st century learning frameworks, and the aforementioned learning taxonomies, promoting collaboration, problem-solving, and real-world connections (standard “critical thinking fare” with Habits of Mind-sounding phrases such as “Open-Mindedness”). At the bottom, it pushes a bit further, however, offering 25 critical thinking strategies to help support progressive learning.
Mark Granovetter Mark Granovetter (born October 20, 1943) is an American sociologist and professor at Stanford University[1] who has created theories in modern sociology since the 1970s. He is best known for his work in social network theory and in economic sociology, particularly his theory on the spread of information in social networks known as "The Strength of Weak Ties" (1973).[2] Background[edit] Granovetter earned an A.B. in History at Princeton University (1965) and a Ph.D in Sociology at Harvard University (1970). Major ideas[edit] The strength of weak ties[edit] Granovetter's paper "The Strength of Weak Ties" is a highly influential sociology paper, with over 27,000 citations according to Google Scholar (by April 2014). Economic sociology: Embeddedness[edit] "Tipping points" / threshold models[edit] Granovetter has done research on a model of how fads are created. Security influence[edit] Granovetter's work has influenced researchers in capability-based security. Bibliography (selected)[edit]
A few things you shouldn't say to a childless woman Not all women can have babies or want to have babies. Photo: Kylie Pickett There are two words for the woman who reached over the table, grabbed my hand and in a consolatory tone announced, ''It's a tragedy you never got around to having children. Those words are ''shut'' and ''up'' (the printable response) or, more charitably, ''think'' and ''first''. The would-be Buddhist in me told me these were her issues. But I still wanted to thump her. Advertisement Most of the childless women I know do find peace with their circumstances, even if it takes some time. I believe children are a gift and not a given in life, and those who receive should be grateful. A guised compliment does not a sympathetic or empathetic person make. A friend of mine who is a well-known celebrity understands this. I was with a girlfriend who had recently been told to give up on IVF and witnessed her pain when the ''you don't know love until you have a child'' remark was dropped at a party.
100 Websites You Should Know and Use (updated!) In the spring of 2007, Julius Wiedemann, editor in charge at Taschen GmbH, gave a legendary TED University talk: an ultra-fast-moving ride through the “100 websites you should know and use.” Six years later, it remains one of the most viewed TED blog posts ever. Time for an update? To see the original list, click here. And now, the original list from 2007, created by Julius Wiedemann, editor in charge at Taschen GmbH.
Generation Generation is the act of producing offspring. In kinship terminology, it is a structural term designating the parent-child relationship. It is also known as biogenesis, reproduction, or procreation in the biological sciences. The term is also often used synonymously with cohort in social science; under this formulation the term means "people within a delineated population who experience the same significant events within a given period of time."[1] Generation in this sense of birth cohort, also known as a "social generation," is widely used in popular culture, and has been the basis for much social analysis. Etymology[edit] The word generation comes from the Latin generāre, meaning "to beget".[2] Familial generation[edit] Five generations of one family—a child with her mother, grandmother, her great-grandmother and great-great-grandmother. Social generation[edit] The U.S. baby boom generation is seen here as the widest bulge (ages 35-44) of the 2000 Census data. Generational theory[edit]
Egalitarianism 1. Preliminary Distinctions Egalitarianism is a contested concept in social and political thought. One might care about human equality in many ways, for many reasons. As currently used, the label “egalitarian” does not necessarily indicate that the doctrine so called holds that it is desirable that people's condition be made the same in any respect or that people ought to be treated the same in any respect. An egalitarian might rather be one who maintains that people ought to be treated as equals—as possessing equal fundamental worth and dignity and as equally morally considerable. Egalitarianism can be instrumental or non-instrumental. Equality of any sort might be valued conditionally or unconditionally. Equality might be deemed to be desirable or undesirable. For those who regard equality as a requirement of justice, the question arises, whether this is a timeless unchanging or instead a variable requirement. Egalitarianism can be formulated with a variety of roles in mind. 2. 3. 4.
Innovation Training Courses: Creativity and Innovation Managemen Schools providing training courses, certificates, diplomas or degree programs of Creativity and Innovation Management Total 600 training courses and degree programs available around the world. United States - United Kingdom - Canada - Australia - India Popular courses:Creativity and InnovationEntrepreneurship and InnovationInnovation ManagementInnovation and EntrepreneurshipStrategic InnovationInnovation Innovation Management and Technology Commercialization (Certificate) Course Format: ClassroomSchool/Trainer: University of BaltimoreTraining Center(s)/Venue(s): Baltimore, United States V The graduate certificate in Innovation Management and Technology Commercialization is geared toward engineers, scientists and managers working in technology-oriented ventures. If you are ready to learn about the complex process of bringing new products, ideas and discoveries to market then this is the program for you. Innovations in Public Management Organizational Creativity and Innovation Creative Innovation
Egalitarianism | Theopedia Egalitarianism, within Christianity, is a movement based on the theological view that not only are all people equal before God in their personhood, but there are no gender-based limitations of what functions or roles each can fulfill in the home, the church, and the society. It is sometimes referred to as biblical equality. Egalitarians understand the Bible as teaching the fundamental equality of women and men of all racial and ethnic groups, all economic classes, and all age groups, based on the teachings and example of Jesus Christ. Among evangelicals, particularly in the last few decades, two rather different paradigms concerning roles of men and women presented in Scripture have emerged. Multimedia Etymology The term Egalitarian is derived from the French word égal, meaning "equal." The Egalitarian position The Egalitarian position is usually characterized by: Christian egalitarian authors differ from secular feminists because they do not reject the Bible’s authority or truthfulness.
Egalitarianism Egalitarianism is a moral principle. It is the belief that all people should be equal. This does not amount to an ethical system, though. It has no standard of value. Examples of egalitarianism are widespread. Egalitarianism comes in many forms, all of which are destructive. Egalitarianism is just a mask for the hatred of the good.