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Shlomo Havlin
Shlomo Havlin (born July 21, 1942) is a Professor in the Department of Physics at Bar-Ilan University, Ramat-Gan, Israel. He served as President of the Israel Physical Society (1996–1999), Dean of Faculty of Exact Sciences (1999–2001), Chairman, Department of Physics (1984–1988). In 2018 he won the Israel Prize for his accomplishments in physics. Biography Shlomo Havlin was born in Jerusalem, Israel (then part of The British Mandate of Palestine). He graduated from Bar-Ilan and Tel-Aviv Universities with Highest Distinction. He obtained an academic position at Bar-Ilan University in 1972 where he became a full Professor in Physics at 1984. During 1978–1979 he was a Royal Society Visiting Fellow at the University of Edinburgh, where he worked with Professors William Cochran and Roger Cowley. In 1984 he became the Chair of the Physics Department at Bar-Ilan University until 1988. During 1983–1984 and 1989–1991, Havlin was a visiting scientist at NIH where he collabor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petah Tiqva
Petah Tikva ( he, פֶּתַח תִּקְוָה, , ), also known as ''Em HaMoshavot'' (), is a city in the Central District of Israel, east of Tel Aviv. It was founded in 1878, mainly by Haredi Jews of the Old Yishuv, and became a permanent settlement in 1883 with the financial help of Baron Edmond de Rothschild. In , the city had a population of . Its population density is approximately . Its jurisdiction covers 35,868 dunams (~35.9 km2 or 15 sq mi). Petah Tikva is part of the Tel Aviv Metropolitan Area. Etymology Petah Tikva takes its name (meaning "Door of Hope") from the biblical allusion in Hosea 2:15: "... and make the valley of Achor a door of hope." The Achor Valley, near Jericho, was the original proposed location for the town. The city and its inhabitants are sometimes known by the nickname "Mlabes" after the Arab village preceding the town. (See "Ottoman era" under "History" below.) History Tell Mulabbis, an archaeological mound in modern Petah Tikva, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roger Cowley
Roger Arthur Cowley, FRS, FRSE, FInstP (24 February 1939 – 27 January 2015) was an English physicist who specialised in the excitations of solids. Biography Cowley was born in Woodford Green, Essex, on 24 February 1939. His father, Cecil Arthur Cowley, was a chartered surveyor, and his mother Mildred Sarah Nash was from a farming family. During World War II, the family evacuated to Leighton Buzzard, Bedfordshire, later moving to Shenfield and on to Gidea Park, Essex. He was educated at Brentwood School, where he had won a scholarship, and afterwards he entered Trinity Hall, Cambridge, where he read natural sciences. Cowley would remain at Cambridge to study for a PhD. He married Sheila Joyce Wells, a teacher of mathematics, on 4 April 1964 and they had two children. On 27 January 2015 Cowley died at a care home in Oxford as a result of a head injury sustained in a bicycle accident a year earlier. Career and research He was appointed professor of physics at the Unive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fractals
In mathematics, a fractal is a geometric shape containing detailed structure at arbitrarily small scales, usually having a fractal dimension strictly exceeding the topological dimension. Many fractals appear similar at various scales, as illustrated in successive magnifications of the Mandelbrot set. This exhibition of similar patterns at increasingly smaller scales is called self-similarity, also known as expanding symmetry or unfolding symmetry; if this replication is exactly the same at every scale, as in the Menger sponge, the shape is called affine self-similar. Fractal geometry lies within the mathematical branch of measure theory. One way that fractals are different from finite geometric figures is how they scale. Doubling the edge lengths of a filled polygon multiplies its area by four, which is two (the ratio of the new to the old side length) raised to the power of two (the conventional dimension of the filled polygon). Likewise, if the radius of a filled sphe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Law
Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. The term ''law'' has diverse usage in many cases (approximate, accurate, broad, or narrow) across all fields of natural science (physics, chemistry, astronomy, geoscience, biology). Laws are developed from data and can be further developed through mathematics; in all cases they are directly or indirectly based on empirical evidence. It is generally understood that they implicitly reflect, though they do not explicitly assert, causal relationships fundamental to reality, and are discovered rather than invented. Scientific laws summarize the results of experiments or observations, usually within a certain range of application. In general, the accuracy of a law does not change when a new theory of the relevant phenomenon is worked out, but rather the scope of the law's application, since the mathematics or statement representing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Reaction
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur. The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Complexity
Complexity characterises the behaviour of a system or model whose components interact in multiple ways and follow local rules, leading to nonlinearity, randomness, collective dynamics, hierarchy, and emergence. The term is generally used to characterize something with many parts where those parts interact with each other in multiple ways, culminating in a higher order of emergence greater than the sum of its parts. The study of these complex linkages at various scales is the main goal of complex systems theory. The intuitive criterion of complexity can be formulated as follows: a system would be more complex if more parts could be distinguished, and if more connections between them existed. Science takes a number of approaches to characterizing complexity; Zayed ''et al.'' reflect many of these. Neil Johnson states that "even among scientists, there is no unique definition of complexity – and the scientific notion has traditionally been conveyed using particular examples ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Randomness
In common usage, randomness is the apparent or actual lack of pattern or predictability in events. A random sequence of events, symbols or steps often has no order and does not follow an intelligible pattern or combination. Individual random events are, by definition, unpredictable, but if the probability distribution is known, the frequency of different outcomes over repeated events (or "trials") is predictable.Strictly speaking, the frequency of an outcome will converge almost surely to a predictable value as the number of trials becomes arbitrarily large. Non-convergence or convergence to a different value is possible, but has probability zero. For example, when throwing two dice, the outcome of any particular roll is unpredictable, but a sum of 7 will tend to occur twice as often as 4. In this view, randomness is not haphazardness; it is a measure of uncertainty of an outcome. Randomness applies to concepts of chance, probability, and information entropy. The fields o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yad Hanadiv
Yad Hanadiv (The Rothschild Foundation) is a Rothschild family philanthropic foundation in Israel. Goals and objectives Yad Hanadiv defines its mission as: Dedicated to creating resources for advancing Israel as a healthy, vibrant, democratic society, committed to Jewish values and equal opportunity for the benefit of all its inhabitants, carrying forward the philanthropic tradition of the Rothschild family. Yad Hanadiv's grantmaking is focused on the areas of education, environment, academic excellence, and Arab community. It funds and operates Ramat Hanadiv Memorial Gardens and Nature Park and is participating in renewal of the National Library of Israel, including the construction of a state-of-the-art, 21st-century National Library for the State of Israel. Initiatives include advancing precision medicine in Israel, promoting humanities research and teaching, upgrading teachers' professional development, Arab employment, advancing excellent Arab students in Science and Techn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Editorial Board
The editorial board is a group of experts, usually at a publication, who dictate the tone and direction the publication's editorial policy will take. Mass media At a newspaper, the editorial board usually consists of the editorial page editor, and editorial writers. Some newspapers include other personnel as well. Editorial boards for magazines may include experts in the subject area that the magazine focuses on, and larger magazines may have several editorial boards grouped by subject. An executive editorial board may oversee these subject boards, and usually includes the executive editor and representatives from the subject focus boards. Editorial boards meet on a regular basis to discuss the latest news and opinion trends and discuss what the newspaper should say on a range of issues. They will then decide who will write what editorials and for what day. When such an editorial appears in a newspaper, it is considered the institutional opinion of that newspaper. At some newspa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graduate School
Postgraduate or graduate education refers to academic or professional degrees, certificates, diplomas, or other qualifications pursued by post-secondary students who have earned an undergraduate (bachelor's) degree. The organization and structure of postgraduate education varies in different countries, as well as in different institutions within countries. While the term "graduate school" or "grad school" is typically used in North America, "postgraduate" is often used in countries such as (Australia, Bangladesh, India, Ireland, New Zealand, Pakistan, South Africa, and the UK). Graduate degrees can include master's degrees, doctoral degrees, and other qualifications such as graduate certificates and professional degrees. A distinction is typically made between graduate schools (where courses of study vary in the degree to which they provide training for a particular profession) and professional schools, which can include medical school, law school, business school, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science Education
Science education is the teaching and learning of science to school children, college students, or adults within the general public. The field of science education includes work in science content, science process (the scientific method), some social science, and some teaching pedagogy. The standards for science education provide expectations for the development of understanding for students through the entire course of their K-12 education and beyond. The traditional subjects included in the standards are physical, life, earth, space, and human sciences. Historical background The first person credited with being employed as a science teacher in a British public school was William Sharp, who left the job at Rugby School in 1850 after establishing science to the curriculum. Sharp is said to have established a model for science to be taught throughout the British public school system.Bernard Leary, 'Sharp, William (1805–1896)’, Oxford Dictionary of National Biography, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neural Network
A neural network is a network or neural circuit, circuit of biological neurons, or, in a modern sense, an artificial neural network, composed of artificial neurons or nodes. Thus, a neural network is either a biological neural network, made up of biological neurons, or an artificial neural network, used for solving artificial intelligence (AI) problems. The connections of the biological neuron are modeled in artificial neural networks as weights between nodes. A positive weight reflects an excitatory connection, while negative values mean inhibitory connections. All inputs are modified by a weight and summed. This activity is referred to as a linear combination. Finally, an activation function controls the amplitude of the output. For example, an acceptable range of output is usually between 0 and 1, or it could be −1 and 1. These artificial networks may be used for predictive modeling, adaptive control and applications where they can be trained via a dataset. Self-learning re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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