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feec7a072232ad5b632f71ca2b63f2f9d9c28cb0 | esien ekpenyong nkana was born into the ambo | esien ekpenyong nkana was born into the ambo house of creek town. he undertook his formal education at calabar and rose to become the headmaster of a school at buea in cameroon. nkanga's greatest work was mutanda oyom namondo, a literary prose which emerged as one of the best entries in an efik literary competition. th... | wikipedia |
d411f5cc0af1197d72a5fe034c0166185c8baebc | the tradition of narrating stories known as nke | the tradition of narrating stories known as nke is an age-old tradition among the efik. prior to the second era, the most common types of literary devices where short stories or fables. by the second half of the 1920s, the art of prose was gradually making an entrance into the efik literary scene. efik prose stood out ... | wikipedia |
23169672853931aeada5de44cfcc70cf685538de | the period between 1929 and 1975 was a | the period between 1929 and 1975 was a golden age in efik literary history. although a number of written efik works were released prior to 1929, gerard points out that the government became instrumental in the literary growth of the efik. in 1929, at the conference of the international institute of african languages an... | wikipedia |
518fd4905267d81aa6a0ec36a28d352734b78c23 | the period between 1929 and 1975 was a | gaskin also produced the work twelve proverbs and one folk-story from the efik country and later resigned as the inspector of schools in 1932. gaskin's position was taken by robert frederick g. adams (r.f.g. adams) in 1932. members of the efik translation bureau were instrumental in the publication of several efik tex... | wikipedia |
9303127737878a37c9fd1967688e7e89d559e043 | although a lot of emphasis was placed on | although a lot of emphasis was placed on biblical-related works in the early era of efik literature, some non-biblical genre still appeared in this era. the earliest known example of a written non-biblical piece can be traced to rev hugh goldie's 1857 book, principles of efik grammar. in this work, goldie provides a wr... | wikipedia |
a86724076290b6d4f073edba5a52cb16d842c2f6 | the early era of written efik literature later | the early era of written efik literature later produced a number of indigenous church hymn writers, notably among them was william inyang ndang who was sent to scotland to be trained in religious music. ndang organised and trained a number of choirs in churches at calabar and produced a hymn book in this era, iquo itor... | wikipedia |
ba5805d6ae0f3cecf66e5e3c05f6ef3df87a3ef2 | among the denominations which paved the way for | among the denominations which paved the way for efik literary development was the united church of scotland and the catholic church. the catholic church arrived old calabar in 1903 on the invitation of chief essien etim offiong iii. among the earliest catholic texts written in the efik language include:- | wikipedia |
273391caf4bd966b0e2535cb21f85565a2be6097 | christian religious denominations were instrumental in shaping the | christian religious denominations were instrumental in shaping the written literary foundation of the efik language. the primary aim of the missionaries was to spread the christian faith across old calabar and its surrounding communities. one of the first steps they took was to promote the literacy rate in old calabar.... | wikipedia |
9ad0c78a808061f2772dcf68a4021f908ff936c7 | the pioneers of early efik written literature were | the pioneers of early efik written literature were the missionaries. the earliest missionaries departed from liverpool on 6 january 1846 and set sail for old calabar. among the first christian missionaries to arrive old calabar were rev. hope m. waddell; mr. samuel edgereley, printer and catechist of the jamaica missio... | wikipedia |
549a67d139051479c731caf6377a59de5521a627 | prior to the arrival of the missionaries, what | prior to the arrival of the missionaries, what constituted efik literature was mainly verbal forms of art. these verbal forms of art consisted of songs, litany of praises and story-telling dances. efik songs had multiple purposes such as for worship, narrating of past events and mockery of crimes committed in the socie... | wikipedia |
74dca12ad0353eb3d41fd5c456790c458e70eb49 | at present, efik literature is an important aspect | at present, efik literature is an important aspect of efik language learning in schools within the lower cross river region and is an integral part of the efik written exams within the west african examinations council (waec) orbit. students are recommended to study a range of efik literary works to aid them in passing... | wikipedia |
1e72e843b2a7ebfc8bd213dfe0d6c849e8f9c815 | before the arrival of the missionaries in 1846, | before the arrival of the missionaries in 1846, much of what consisted of efik literature was oral literature. by the late 1840s, efik literature gradually transitioned into written form. the missionaries were instrumental in this transition. these christian missionaries aided in the setting up of schools across old ca... | wikipedia |
832e294d158e89ee0a7583246e5a5c40806c8ba4 | efik literature (efik: Ñwed ikọ efịk) is literature | efik literature (efik: Ñwed ikọ efịk) is literature spoken or written in the efik language, particularly by efik people or speakers of the efik language. traditional efik literature can be classified as follows; ase (commemorative poetry), uto (epic poetry), mbụk (consisting of myths, legends and historical stories), Ñ... | wikipedia |
27daea306e6afe1ebe045bf76d92436ea1a4bc33 | in mathematics, the duflo isomorphism is an isomorphism | in mathematics, the duflo isomorphism is an isomorphism between the center of the universal enveloping algebra of a finite-dimensional lie algebra and the invariants of its symmetric algebra. it was introduced by michel duflo (1977) and later generalized to arbitrary finite-dimensional lie algebras by kontsevich. the p... | wikipedia |
802ab1021c3d6c706b5a74109eae6e79159b3bb2 | in mathematics, the duflo isomorphism is an isomorphism | � denotes the algebra of formal power series on g ∗ . working with formal power series, we thus obtain an element since the dimension of g is finite, one can think of e n d as m n , hence s ¯ ⊗ e n d is m n and by applying the determinant map, we obtain an element which is related to the todd class in algebraic topolog... | wikipedia |
d30a18b09f19958784507aa30de997f2fbd2ab28 | for a nilpotent lie algebra the duflo isomorphism | for a nilpotent lie algebra the duflo isomorphism coincides with the symmetrization map from symmetric algebra to universal enveloping algebra. for a semisimple lie algebra the duflo isomorphism is compatible in a natural way with the harish-chandra isomorphism. | wikipedia |
9d15af6c50b7c8d536ccac22c98cd754fc1ae5f2 | now, g ∗ {\displaystyle {\mathfrak {g}}^{\ast }} acts | now, g ∗ {\displaystyle {\mathfrak {g}}^{\ast }} acts as derivations on s (g) {\displaystyle s({\mathfrak {g}})} since any element of g ∗ {\displaystyle {\mathfrak {g}}^{\ast }} gives a translation-invariant vector field on g {\displaystyle {\mathfrak {g}}}. as a result, the algebra s (g ∗) {\displaystyle s({\mathfrak ... | wikipedia |
a8b71895b97bdc07e06bdf909403602ee0e48af5 | since the dimension of g {\displaystyle {\mathfrak {g}}} | since the dimension of g {\displaystyle {\mathfrak {g}}} is finite, one can think of e n d (g) {\displaystyle \mathrm {end} ({\mathfrak {g}})} as m n (r) {\displaystyle \mathrm {m} _{n}(\mathbb {r})}, hence s ¯ (g ∗) ⊗ e n d (g) {\displaystyle {\overline {s}}({\mathfrak {g}}^{\ast })\otimes \mathrm {end} ({\mathfrak {g... | wikipedia |
2396715d19730d0bdf5d6b366b9c70cdcbf1c784 | going further, we can apply any formal power | going further, we can apply any formal power series to a d {\displaystyle \mathrm {ad} } and obtain an element of s ¯ (g ∗) ⊗ e n d (g) {\displaystyle {\overline {s}}({\mathfrak {g}}^{\ast })\otimes \mathrm {end} ({\mathfrak {g}})}, where s ¯ (g ∗) {\displaystyle {\overline {s}}({\mathfrak {g}}^{\ast })} denotes the al... | wikipedia |
8bf657216ecb089b03fce34a124cdc7a13ab36d7 | both s (g ∗) {\displaystyle s({\mathfrak {g}}^{\ast })} | both s (g ∗) {\displaystyle s({\mathfrak {g}}^{\ast })} and e n d (g) {\displaystyle \mathrm {end} ({\mathfrak {g}})} are algebras so their tensor product is as well. thus, we can take powers of a d {\displaystyle \mathrm {ad} }, say | wikipedia |
5fb43c7a73320289193494291af24d463c98fcf5 | or, for that matter, an element of the | or, for that matter, an element of the larger space s (g ∗) ⊗ e n d (g) {\displaystyle s({\mathfrak {g}}^{\ast })\otimes \mathrm {end} ({\mathfrak {g}})}, since g ∗ ⊂ s (g ∗) {\displaystyle {\mathfrak {g}}^{\ast }\subset s({\mathfrak {g}}^{\ast })}. call this element | wikipedia |
ff87fab60d5d345d4c916c94f062ca48196be51c | where the superscript indicates the subspace annihilated by | where the superscript indicates the subspace annihilated by the action of g {\displaystyle {\mathfrak {g}}}. both s (g) g {\displaystyle s({\mathfrak {g}})^{\mathfrak {g}}} and u (g) g {\displaystyle u({\mathfrak {g}})^{\mathfrak {g}}} are commutative subalgebras, indeed u (g) g {\displaystyle u({\mathfrak {g}})^{\math... | wikipedia |
2852720307eb7e956e652e3657876b98ab255e1d | the poincaré-birkoff-witt theorem gives for any lie algebra | the poincaré-birkoff-witt theorem gives for any lie algebra g {\displaystyle {\mathfrak {g}}} a vector space isomorphism from the polynomial algebra s (g) {\displaystyle s({\mathfrak {g}})} to the universal enveloping algebra u (g) {\displaystyle u({\mathfrak {g}})}. this map is not an algebra homomorphism. it is equiv... | wikipedia |
7d510021f28cfa38386a40d0a79bd3a2eeb07f22 | in mathematics, the duflo isomorphism is an isomorphism | in mathematics, the duflo isomorphism is an isomorphism between the center of the universal enveloping algebra of a finite-dimensional lie algebra and the invariants of its symmetric algebra. it was introduced by michel duflo (1977) and later generalized to arbitrary finite-dimensional lie algebras by kontsevich. | wikipedia |
0a3d541d69739a34562b632d92cdd138702ce7d8 | edwin richard gilliland was an american chemical engineer | edwin richard gilliland was an american chemical engineer and institute professor at the massachusetts institute of technology. gilliland was born on july 10, 1909, in el reno, oklahoma and moved with his family to little rock, arkansas in 1918. he graduated from the university of illinois at urbana-champaign with a b.... | wikipedia |
00777d8d22ee0eaa19f05d49a263757ef60d1408 | gilliland also held several appointed offices in public | gilliland also held several appointed offices in public service. he was the assistant rubber director for the war production board between 1942 and 1944, deputy chief of the chemical engineering division of the national defense research committee, deputy chairman of the guided missiles committee on the joint chiefs of ... | wikipedia |
c1c395c417c075dfd8b10464d47870a51e886ecd | gilliland was born on july 10, 1909, in | gilliland was born on july 10, 1909, in el reno, oklahoma and moved with his family to little rock, arkansas in 1918. he graduated from the university of illinois at urbana-champaign with a b.s. in 1930 and an m.s. from the pennsylvania state university in 1931. he received his sc.d. from mit in 1933 under the directio... | wikipedia |
f7342dd33181ecc8580e7378f4ac7f2105a2aba9 | in later life, weil suffered from strokes and | in later life, weil suffered from strokes and heart problems. he died at the georgetown house retirement home in washington, dc, on july 1, 1995. his wife vinette died in 1978. he was survived by his son, stephen, and sister, helen weil benjamin (1905-1996). | wikipedia |
a5b44f2e7812c2a247bdb6a478a2a64e8fca649f | weil left the aec in 1952, to become | weil left the aec in 1952, to become an independent consultant, working for various businesses, government bodies and non-profit organisations such as the friends of the earth. in 1955, he was the technical director of the united states delegation to the united nations conference in geneva, on the peaceful use of atomi... | wikipedia |
02460fe411347990a9edc81ce97463a65e77e573 | in 1948, weil was part of an aec | in 1948, weil was part of an aec delegation, which also included walter zinn and charles wende, that went to britain as part of the so-called modus vivedi that had replaced the wartime nuclear special relationship, between britain and the united states. they visited harwell and saw the gleep and bepo reactors. the zinn... | wikipedia |
410bac2217429bfea69286d3515a0d9abc94a935 | weil's lack of enthusiasm i think may have | weil's lack of enthusiasm i think may have reflected his general skepticism towards breeder reactors —a skepticism that eventually included all of nuclear energy. george, the physicist who operated the control rod during the first chain reaction of december 2, 1942, became the first articulate opponent of nuclear energ... | wikipedia |
0bc9a72f2beaa13045db7a34119b24743f55c76f | after the war, weil worked for general electric | after the war, weil worked for general electric on reactor design. he then joined the atomic energy commission (aec), where he became the assistant director of the reactor development division. he argued for a more cautious approach to reactor development and was critical of the early design work on high flux reactors.... | wikipedia |
3e0b7517b9436912b1b07b874e9ffd96a3f3a85b | cp-1 was ready on december 2, 1942; weil | cp-1 was ready on december 2, 1942; weil worked the final control rod, while fermi monitored the neutron activity. the pile went critical at 15:36, initiating the first man-made, self-sustaining nuclear chain reaction. fermi shut it down 28 minutes later, by having the control rods re-inserted. weil continued to work i... | wikipedia |
2f5b8c7ae9d99adf96b01f713b4570f9a3a6e801 | in early 1942, compton concentrated the teams he | in early 1942, compton concentrated the teams he was responsible for, at the metallurgical laboratory at the university of chicago. fermi's group became primarily responsible for building a reactor, while eugene wigner 's group was responsible for its design. in september 1942, the metallurgical laboratory became part ... | wikipedia |
c5befba368687e596a4fe27a35f30183f749e0af | at columbia university, weil became involved in enrico | at columbia university, weil became involved in enrico fermi 's efforts to build a nuclear reactor. in december 1941, the office of scientific research and development assumed responsibility for this project, which was placed under the direction of arthur compton. | wikipedia |
cacc3998b05d742b9d54770fc5eeae8ee2e72365 | george leon weil was born in new york | george leon weil was born in new york city on september 18, 1907, the son of leon and elsie rose weil. his great-grandfather was henry lehman (1822–1855), founder of h. lehman, which became lehman brothers. he had an older sister, helen. he entered harvard college, from which he graduated in 1939 and then columbia univ... | wikipedia |
33701d31ab379202354ba7fe066a4382df708cfe | george leon weil (september 18, 1907 – july | george leon weil (september 18, 1907 – july 1, 1995) was an american physicist. on december 2, 1942, he removed the control rod from the chicago pile-1 nuclear reactor, initiating the first man-made, self-sustaining nuclear chain reaction. | wikipedia |
3b7b425a13a4818ad9641af80abfe8d0613e8ab5 | eckart heinz meiburg is a german-american professor of | eckart heinz meiburg is a german-american professor of mechanical engineering at the university of california, santa barbara. his research focuses on using computational fluid dynamics to study phenomena including sediment transport in gravity and turbidity currents, double diffusive instabilities, and particle-laden f... | wikipedia |
e065352363ff506a6394e3cde109cfdb7a1ad656 | his awards have included a senior gledden fellowship | his awards have included a senior gledden fellowship (2005) from the institute of advanced studies at the university of western australia, the humboldt prize (2005) senior research award, the presidential young investigator award (1990), a first prize at the scottish offshore achievement awards, and the aps gallery of ... | wikipedia |
767485ef60ee5f610619de1ddfbc3449eea5b025 | following a one-year postdoc at stanford university in | following a one-year postdoc at stanford university in chemical engineering, meiburg went to brown university in 1987 as an assistant professor of applied mathematics. in 1990 he went to the university of southern california as professor of aerospace engineering. in 2000 he moved to university of california santa barba... | wikipedia |
0d704dd4c8ab80d3c2a2cfb7e37cc1abfc3d12a3 | meiburg did his undergraduate studies university of karlsruhe, | meiburg did his undergraduate studies university of karlsruhe, earning a diplom-ing. of mechanical engineering in 1981. following one year under a daad fellowship at stanford, he did his phd studies at karlsruhe as well in 1985. | wikipedia |
e5ce9d1b392cf9a16d6db5ff55e0cade524e00b6 | eckart heinz meiburg (born 1959) is a german-american | eckart heinz meiburg (born 1959) is a german-american professor of mechanical engineering at the university of california, santa barbara. his research focuses on using computational fluid dynamics to study phenomena including sediment transport in gravity and turbidity currents, double diffusive instabilities, and part... | wikipedia |
1b2c3c1dab0101c1dc6519c3dbb7deb043ee34df | the ghk algorithm is an importance sampling method | the ghk algorithm is an importance sampling method for simulating choice probabilities in the multivariate probit model. these simulated probabilities can be used to recover parameter estimates from the maximized likelihood equation using any one of the usual well known maximization methods. train has well documented s... | wikipedia |
9668556b0763591e79eb5b8e480654cd27a89e86 | the ghk algorithm is an importance sampling method | draw from the truncated univariate normal distribution with the given bounds above. this can be done by the inverse cdf method and noting the truncated normal distribution is given by, where u will be a number between 0 and 1 because the above is a cdf. this suggests to generate random draws from the truncated distrib... | wikipedia |
0420925712131a7002da0947a3fe07829ab029ad | this is well approximated by 1 s ∑ | this is well approximated by 1 s ∑ s = 1 s ∏ j = 1 j l j j {\displaystyle {\frac {1}{s}}\sum _{s=1}^{s}\prod _{j=1}^{j}l_{jj}}. | wikipedia |
e1174855d087b59b0195ac26c80ac29f8b53ead8 | let the denominator ∏ j = 1 j | let the denominator ∏ j = 1 j Φ j (b − ∑ k = 1 k < j c j k η k c j j) − Φ (a − ∑ k = 1 k < j c j k η k c j j) = ∏ j = 1 j l j j {\displaystyle \prod _{j=1}^{j}\phi _{j}{\big (}{\frac {b-\sum _{k=1}^{k<j}c_{jk}\eta _{k}}{c_{jj}}}{\big)}-\phi {\big (}{\frac {a-\sum _{k=1}^{k<j}c_{jk}\eta _{k}}{c_{jj}}}{\big)}=\prod _{j=1... | wikipedia |
3229b421c2ce9e408ad41c62a8845d9d2df9306c | because y j | { y k < | because y j | { y k < j ∗ } ∗ ∼ n (x i β + ∑ k = 1 k < j c j k η k, c j j 2) {\displaystyle y_{j|\{y_{k<j}^{*}\}}^{*}\sim n(\mathbf {x_{i}\beta } +\sum _{k=1}^{k<j}c_{jk}\eta _{k},c_{jj}^{2})} the above standardization makes each term mean 0 variance 1. | wikipedia |
f07c5e7b5ab652ab99eaf771abe3516a4ee44f48 | because y j ∗ {\displaystyle y_{j}^{*}} conditional on | because y j ∗ {\displaystyle y_{j}^{*}} conditional on y k, k < j {\displaystyle y_{k},\ k<j} is restricted to the set a {\displaystyle a} by the setup using the cholesky factorization then we know that q (⋅) {\displaystyle q(\cdot)} is a truncated multivariate normal. the distribution function of a truncated normal is... | wikipedia |
29ca72e44e5688075214e98c442ce60d1a2b9c5a | where α = a − μ σ {\displaystyle | where α = a − μ σ {\displaystyle \alpha ={\frac {a-\mu }{\sigma }}} and β = b − μ σ {\displaystyle \beta ={\frac {b-\mu }{\sigma }}} and f {\displaystyle f} is the standard normal cdf. with such draws one can reconstruct the y i ∗ {\displaystyle \mathbf {y_{i}^{*}} } by its simplified equation using the cholesky factor... | wikipedia |
bba3b1a2739e5c816cd6bb6d6504be97421905ae | note: y i ∗ = x i β | note: y i ∗ = x i β + c η i {\displaystyle \mathbf {y_{i}^{*}} =\mathbf {x_{i}\beta } +c\eta _{i}}, substituting: | wikipedia |
34505c5a8cd6e97b64fd6b466c656a9bc15cbb3d | for example, if the region of truncation a | for example, if the region of truncation a {\displaystyle \mathbf {a} } has lower and upper limits equal to {\displaystyle } (including a,b = ± ∞ {\displaystyle \pm \infty }) then the task becomes | wikipedia |
9def473f8fde0a81f16d70506773214c2518d06f | evaluating pr (y i | x i β, | evaluating pr (y i | x i β, Σ) = ∫ 1 y ∗ ∈ a f n (y i ∗ | x i β, Σ) d y i ∗ {\displaystyle \pr(\mathbf {y_{i}} |\mathbf {x_{i}\beta },\sigma)=\int \mathbb {1} _{y^{*}\in a}f_{n}(\mathbf {y} _{i}^{*}|\mathbf {x_{i}\beta },\sigma)d\mathbf {y} _{i}^{*}} is simplified by recognizing that the latent data model y i ∗ = x i β... | wikipedia |
d3a6db5fb725ce294dab31e9a025c6b7284302ba | unless j {\displaystyle j} is small (less than | unless j {\displaystyle j} is small (less than or equal to 2) there is no closed form solution for the integrals defined above (some work has been done with j = 3 {\displaystyle j=3}). the alternative to evaluating these integrals closed form or by quadrature methods is to use simulation. ghk is a simulation method to ... | wikipedia |
6b5957e25ba695f1af10f6a5756f4e48bb14f603 | consider the case where one is attempting to | consider the case where one is attempting to evaluate the choice probability of pr (y i | x i β, Σ) {\displaystyle \pr(\mathbf {y_{i}} |\mathbf {x_{i}\beta },\sigma)} where y i = (y 1,..., y j), (i = 1,..., n) {\displaystyle \mathbf {y_{i}} =(y_{1},...,y_{j}),\ (i=1,...,n)} and where we can take j {\displaystyle j} as ... | wikipedia |
d7422c06b6e33394c30e1f7656303b5eb683018f | the ghk algorithm (geweke, hajivassiliou and keane) is | the ghk algorithm (geweke, hajivassiliou and keane) is an importance sampling method for simulating choice probabilities in the multivariate probit model. these simulated probabilities can be used to recover parameter estimates from the maximized likelihood equation using any one of the usual well known maximization me... | wikipedia |
fab8f0287a768ffb7d63927222624413645693f3 | eugène-melchior péligot (24 march 1811 – 15 april | eugène-melchior péligot (24 march 1811 – 15 april 1890), also known as eugène péligot, was a french chemist who isolated the first sample of uranium metal in 1841. péligot proved that the black powder of martin heinrich klaproth was not a pure metal (it was an oxide of uranium, known in chemistry as uo2). he then succe... | wikipedia |
b20bc4b49369e8dab2beaaf6c986b4c6d8e523d2 | péligot was a professor of analytical chemistry at | péligot was a professor of analytical chemistry at the institut national agronomique. he collaborated with jean-baptiste dumas, and together they discovered the methyl radical during experiments on wood spirit (methanol). the terminology " methyl alcohol " was created by both chemists from "wood wine". they also prepar... | wikipedia |
ff4ca8c35cf860e97756e25873f2653eccf38ff0 | péligot proved that the black powder of martin | péligot proved that the black powder of martin heinrich klaproth was not a pure metal (it was an oxide of uranium, known in chemistry as uo). he then succeeded in producing pure uranium metal by reducing uranium tetrachloride (ucl) with potassium metal. today better methods have been found. | wikipedia |
84f2f5a30d6e1f79ec996f48483d2b3b18b725e2 | eugène-melchior péligot (24 march 1811 – 15 april | eugène-melchior péligot (24 march 1811 – 15 april 1890), also known as eugène péligot, was a french chemist who isolated the first sample of uranium metal in 1841. | wikipedia |
04884a3978086b86eca32a1879c13e2c556783fb | eduard riecke was a german experimental physicist. riecke | eduard riecke was a german experimental physicist. riecke studied physics at the polytechnic in stuttgart, at the university of tübingen and at the university of göttingen under wilhelm weber and friedrich kohlrausch, where he received his doctorate in 1871 and qualified as a professor shortly thereafter. in 1873 he be... | wikipedia |
ed1fea9ff39731a07c8410bf7e31a605d016f54c | he conducted experiments on electrical conduction in metals | he conducted experiments on electrical conduction in metals for which he further developed a model of management by electrons began by paul drude. with the model, among other things, the decrease in conductivity could be explained with increase in temperature. later he worked among others with electricity conduction in... | wikipedia |
b84f98998fa341433e6911635111731026e3e30b | riecke studied physics at the polytechnic in stuttgart, | riecke studied physics at the polytechnic in stuttgart, at the university of tübingen and at the university of göttingen under wilhelm weber and friedrich kohlrausch, where he received his doctorate in 1871 and qualified as a professor shortly thereafter. in 1873 he became associate professor and in 1881 full professor... | wikipedia |
09ff25a6c6dc502f3328923e3d7e282355c3b06b | ellsworth storey was a seattle architect. he is | ellsworth storey was a seattle architect. he is known for combining contemporary and historical architectural styles with local materials to create a regional architectural style that reflected the natural environment of the pacific northwest. storey was inspired to become an architect after visiting the world's columb... | wikipedia |
deef8033d5059790768fa410a3df69b29e0d76b0 | ellsworth storey was a seattle architect. he is | their imaginative use of local materials, influenced the northwest regional style developed by mid-century modernist architects such as john yeon and pietro belluschi. in 1934, storey began work on facilities for moran state park. his buildings incorporated arts and crafts motifs into the prevalent rustic style of the... | wikipedia |
5eaa85f9ab20f38c96c5c04481d59cfff9b867bf | storey continued to work with government agencies into | storey continued to work with government agencies into the 1950s, including projects for the federal housing authority and united states navy's sand point naval air station. he retired completely from architecture in 1955. he died in 1960, in ithaca, new york, and requested that his ashes be scattered over puget sound. | wikipedia |
6852a27dc58caa66f33b482d48be9d979a2f20bb | in 1934, storey began work on facilities for | in 1934, storey began work on facilities for moran state park. his buildings incorporated arts and crafts motifs into the prevalent rustic style of the national park service. the project culminated in the construction of eight buildings, including a 12-story fire lookout tower on mount constitution. | wikipedia |
f6de86d43752dbc0379368377a3318dabf6db032 | between 1912 and 1915, storey built a set | between 1912 and 1915, storey built a set of 12 rental cottages adjacent to colman park on lake washington boulevard. the ellsworth storey cottages, as they came to be known, were constructed with exposed frames, shingled roofs, and interior detailing made from local woods. the cottages also featured generous front por... | wikipedia |
c002a1f25ccb524d7c46ef444aeabd9ec5e7814c | storey's residential and commercial projects included private houses, | storey's residential and commercial projects included private houses, the sigma nu fraternity house of the university of washington, and several churches. his designs blended the prairie style with a wide variety of historical american and european architectural styles such as georgian and elizabethan revival, english ... | wikipedia |
466a58e0ae71054c630f9c9c3186b6d9931cd79d | he moved to seattle in 1903 to begin | he moved to seattle in 1903 to begin his career. his early projects, including the hoo hoo house, designed for the alaska–yukon–pacific exposition, were designed in a mix of arts and crafts and tudor revival styles, but also incorporated elements of pioneer architecture. many of storey's early residences, including the... | wikipedia |
c2ed1fc9780f425bb5c815bafd385e98b405ed3b | storey was inspired to become an architect after | storey was inspired to become an architect after visiting the world's columbian exposition as a child. he attended architecture school at the university of illinois at the same time as walter burley griffin, where he was influenced by the new prairie school of architecture and its main proponent, frank lloyd wright. | wikipedia |
d6d2fea469e16101657adadeaa844e1839d1a38d | ellsworth storey (november 16, 1879 – may 28, | ellsworth storey (november 16, 1879 – may 28, 1960) was a seattle architect. he is known for combining contemporary and historical architectural styles with local materials to create a regional architectural style that reflected the natural environment of the pacific northwest. | wikipedia |
06d6ffecf97fd6b0910ad0d15036593dcf508576 | gary ray holt is a canadian retired professional | gary ray holt is a canadian retired professional ice hockey forward who played 101 games in the national hockey league for the st. louis blues, cleveland barons and california golden seals. holt now resides in spokane, washington. born in sarnia, ontario, holt is the older brother of former nhl defenseman randy holt. | wikipedia |
45c9b525f5ae37c83ec31c6c260e7280cc3e0d31 | gary ray holt (born january 1, 1952) is | gary ray holt (born january 1, 1952) is a canadian retired professional ice hockey forward who played 101 games in the national hockey league for the st. louis blues, cleveland barons and california golden seals. holt now resides in spokane, washington. | wikipedia |
837fca5c97254891f8da27f0676d746357b8ee45 | in theoretical chemistry, an energy profile is a | in theoretical chemistry, an energy profile is a theoretical representation of a chemical reaction or process as a single energetic pathway as the reactants are transformed into products. this pathway runs along the reaction coordinate, which is a parametric curve that follows the pathway of the reaction and indicates ... | wikipedia |
477225c5594b67b7cfd437c3a4ad205f5cc51d3d | catalysts: there are two types of catalysts, positive | catalysts: there are two types of catalysts, positive and negative. positive catalysts increase the reaction rate and negative catalysts (or inhibitors) slow down a reaction and possibly cause the reaction not occur at all. the purpose of a catalyst is to alter the activation energy. figure 12 illustrates the purpose o... | wikipedia |
45f6f0c27963a7673b309304a41b060792956f10 | solvent effect: in general, if the transition state | solvent effect: in general, if the transition state for the rate determining step corresponds to a more charged species relative to the starting material then increasing the polarity of the solvent will increase the rate of the reaction since a more polar solvent be more effective at stabilizing the transition state (Δ... | wikipedia |
820b07547951fe4e6addb1198a83f5a1fe78873c | when a reactant can form two different products | when a reactant can form two different products depending on the reaction conditions, it becomes important to choose the right conditions to favor the desired product. if a reaction is carried out at relatively lower temperature, then the product formed is one lying across the smaller energy barrier. this is called kin... | wikipedia |
8ab329addd2f91dac4472a604fb7a97dc17ae23e | while most reversible processes will have a reasonably | while most reversible processes will have a reasonably small k of 10 or less, this is not a hard and fast rule, and a number of chemical processes require reversibility of even very favorable reactions. for instance, the reaction of an carboxylic acid with amines to form a salt takes place with k of 10, and at ordinary... | wikipedia |
e8076b5e8384f1f870048a506eb9438d85dd53f3 | the relative stability of reactant and product does | the relative stability of reactant and product does not define the feasibility of any reaction all by itself. for any reaction to proceed, the starting material must have enough energy to cross over an energy barrier. this energy barrier is known as activation energy (∆ g) and the rate of reaction is dependent on the h... | wikipedia |
c00b55343fce6200b93a2d5696d94093f03a3938 | a favorable reaction is one in which the | a favorable reaction is one in which the change in free energy ∆ g ° is negative (exergonic) or in other words, the free energy of product, g °, is less than the free energy of the starting materials, g °. ∆ g °> 0 (endergonic) corresponds to an unfavorable reaction. the ∆ g ° can be written as a function of change in ... | wikipedia |
4304720a532d16697d257e605b2ca17799208847 | a chemical reaction can be defined by two | a chemical reaction can be defined by two important parameters- the gibbs free energy associated with a chemical transformation and the rate of such a transformation. these parameters are independent of each other. while free energy change describes the stability of products relative to reactants, the rate of any react... | wikipedia |
c24f8ef4a4d39da737dfb3ace0e6af3497191931 | although a reaction coordinate diagram is essentially derived | although a reaction coordinate diagram is essentially derived from a potential energy surface, it is not always feasible to draw one from a pes. a chemist draws a reaction coordinate diagram for a reaction based on the knowledge of free energy or enthalpy change associated with the transformation which helps him to pla... | wikipedia |
862fe81c13d470895971beca010cf155e5992870 | reaction coordinate diagrams also give information about the | reaction coordinate diagrams also give information about the equilibrium between a reactant or a product and an intermediate. if the barrier energy for going from intermediate to product is much higher than the one for reactant to intermediate transition, it can be safely concluded that a complete equilibrium is establ... | wikipedia |
a9c2b4608df84b8b432e2c93b23c9a0dcc94e29c | a reaction involving more than one elementary step | a reaction involving more than one elementary step has one or more intermediates being formed which, in turn, means there is more than one energy barrier to overcome. in other words, there is more than one transition state lying on the reaction pathway. as it is intuitive that pushing over an energy barrier or passing ... | wikipedia |
50c544e1dd7a914703e5daf7e5579f768e163a18 | the intrinsic reaction coordinate (irc), derived from the | the intrinsic reaction coordinate (irc), derived from the potential energy surface, is a parametric curve that connects two energy minima in the direction that traverses the minimum energy barrier (or shallowest ascent) passing through one or more saddle point(s). however, in reality if reacting species attains enough ... | wikipedia |
fa9628beb5988d808aecf7597594ad12e40c6266 | saddle point represents a maximum along only one | saddle point represents a maximum along only one direction (that of the reaction coordinate) and is a minimum along all other directions. in other words, a saddle point represents a transition state along the reaction coordinate. mathematically, a saddle point occurs when | wikipedia |
290ddde1ddc68c02c43b6508a5823a216e8b2ad2 | using analytical derivatives of the derived expression for | using analytical derivatives of the derived expression for energy, e = f (q 1, q 2, …, q n), {\displaystyle e=f(q_{1},q_{2},\dots,q_{n}),} one can find and characterize a stationary point as minimum, maximum or a saddle point. the ground states are represented by local energy minima and the transition states by saddle ... | wikipedia |
e75d60f232e2b1b2362f786ea83d53ba8c980bd2 | the most important points on a pes are | the most important points on a pes are the stationary points where the surface is flat, i.e. parallel to a horizontal line corresponding to one geometric parameter, a plane corresponding to two such parameters or even a hyper-plane corresponding to more than two geometric parameters. the energy values corresponding to ... | wikipedia |
2afdbcd857caa6fa783aa7236df355fc070c13ab | the concept can be expanded to a tri-atomic | the concept can be expanded to a tri-atomic molecule such as water where we have two o−h bonds and h−o−h bond angle as variables on which the potential energy of a water molecule will depend. we can safely assume the two o−h bonds to be equal. thus, a pes can be drawn mapping the potential energy e of a water molecule ... | wikipedia |
85a1ff2d3bc3bee8945308ebe5cae607ede3a8c4 | consider a diatomic molecule ab which can macroscopically | consider a diatomic molecule ab which can macroscopically visualized as two balls (which depict the two atoms a and b) connected through a spring which depicts the bond. as this spring (or bond) is stretched or compressed, the potential energy of the ball-spring system (ab molecule) changes and this can be mapped on a ... | wikipedia |
aa504628efc6f3987562d869acbb22accc362cdb | an n -atom system is defined by 3 | an n -atom system is defined by 3 n coordinates: (x, y, z) for each atom. these 3 n degrees of freedom can be broken down to include 3 overall translational and 3 (or 2) overall rotational degrees of freedom for a non-linear system (for a linear system). however, overall translational or rotational degrees do not affec... | wikipedia |
763278399ce22d18047370351b19a5aa00053102 | for the quantum mechanical interpretation, a pes is | for the quantum mechanical interpretation, a pes is typically defined within the born–oppenheimer approximation (in order to distinguish between nuclear and electronic motion and energy) which states that the nuclei are stationary relative to the electrons. in other words, the approximation allows the kinetic energy of... | wikipedia |
08b209ffcabab772a7724e04e5893f3448a75a82 | in simplest terms, a potential energy surface or | in simplest terms, a potential energy surface or pes is a mathematical or graphical representation of the relation between energy of a molecule and its geometry. the methods for describing the potential energy are broken down into a classical mechanics interpretation (molecular mechanics) and a quantum mechanical inter... | wikipedia |
fe4f9b4f2e53345df02667bba6bc783b6a194197 | qualitatively, the reaction coordinate diagrams (one-dimensional energy surfaces) | qualitatively, the reaction coordinate diagrams (one-dimensional energy surfaces) have numerous applications. chemists use reaction coordinate diagrams as both an analytical and pedagogical aid for rationalizing and illustrating kinetic and thermodynamic events. the purpose of energy profiles and surfaces is to provide... | wikipedia |
81541282c3581c33fb8ef29db906340abbe0c475 | in theoretical chemistry, an energy profile is a | in theoretical chemistry, an energy profile is a theoretical representation of a chemical reaction or process as a single energetic pathway as the reactants are transformed into products. this pathway runs along the reaction coordinate, which is a parametric curve that follows the pathway of the reaction and indicates ... | wikipedia |
ec14cbef0833166a247f1b0f8d889b5f1f3631d0 | gborogboro and meme were twins and the first | gborogboro and meme were twins and the first man and woman in lugbara mythology. gborogboro and meme were a pair of twins created by the supreme god adroa. the twins were created and lived in a place called loloi, which was located near juba in modern-day sudan. gborogboro was associated with the heavens while meme was... | wikipedia |
d31ca1115b83373115c26cb08465f4b02b260023 | the siblings were involved in several fantastical myths, | the siblings were involved in several fantastical myths, one of which involved them curing a woman who had leprosy and then having sexual relations with her. this led to a dispute with the woman's kin, resulting in a war breaking out. the dispute was settled with a fine that was paid to her kin along with a dowry. this... | wikipedia |
65a00d1888155250d6cfaf65fd607a1cae9a47a0 | eventually, the hero-ancestors jaki and dribidu were produced | eventually, the hero-ancestors jaki and dribidu were produced by the last generation. the siblings could perform superhuman and magical feats. dribidu ('the hairy one') was covered in hair, and he was also known as 'banyale ('eater of men') as he was known to eat his own children. he was ultimately exiled for his canni... | wikipedia |
2c5d0f566d9d3cc07849760b3314f3498acfa68c | the twins married each other and produced another | the twins married each other and produced another set of boy-girl twins. the twins' offspring then produced another set of boy-girl twins, and this iteration goes on for several generations, with the number of generations and their names differing between myths. in at least one version, the names of the generations are... | wikipedia |
c8d136d4b468f4c5851ace346a0cf3265e60eb53 | gborogboro and meme were a pair of twins | gborogboro and meme were a pair of twins created by the supreme god adroa. the twins were created and lived in a place called loloi, which was located near juba in modern-day sudan. gborogboro was associated with the heavens while meme was associated with the earth. wild animals were said to be born from meme's womb, w... | wikipedia |
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