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eb694efe89f3af2e765d2f0c9c75e7c99cd599e2 | as Ξ = v (β β) β v | as Ξ = v (β β) β v (+ β) {\displaystyle \delta =v(-\infty)-v(+\infty)} and n = v (+ β) + v (β β) {\displaystyle n=v(+\infty)+v(-\infty)}, and from (18) p = (n β Ξ / 2) {\displaystyle p=(n-\delta /2)}, we have that p = v (+ β) = v (a 0, b 0, c 0, d 0, β¦) {\displaystyle p=v(+\infty)=v(a_{0},b_{0},c_{0},d_{0},\dots)} and ... | wikipedia |
7aef0dcdee38bb99e9ac4deeb461fe25159f633e | since our chain a 0 {\displaystyle a_{0}}, b | since our chain a 0 {\displaystyle a_{0}}, b 0 {\displaystyle b_{0}}, c 0 {\displaystyle c_{0}}, d 0 {\displaystyle d_{0}},... will have n {\displaystyle n} members it is clear that v (+ β) + v (β β) = n {\displaystyle v(+\infty)+v(-\infty)=n} since within v (a 0, b 0, c 0, d 0, β¦) {\displaystyle v(a_{0},b_{0},c_{0},d_... | wikipedia |
05bdc85ea7fdccecc4d1e6a2600142ad11ab305c | so we get v (+ β) = v | so we get v (+ β) = v (a 0, b 0, c 0, d 0, β¦) {\displaystyle v(+\infty)=v(a_{0},b_{0},c_{0},d_{0},\dots)} that is, v (+ β) {\displaystyle v(+\infty)} is the number of changes of sign in the sequence a 0 β n {\displaystyle a_{0}\infty ^{n}}, b 0 β n β 1 {\displaystyle b_{0}\infty ^{n-1}}, c 0 β n β 2 {\displaystyle c_{0... | wikipedia |
1f4f0b5ed06e1b1dfa1c48d1f466b51756a508c4 | note now, that in determining the signs of | note now, that in determining the signs of the members of the sequence of polynomials f 1 (x), f 2 (x), β¦, f m (x) {\displaystyle f_{1}(x),f_{2}(x),\dots,f_{m}(x)} that at Ο = Β± β {\displaystyle \omega =\pm \infty } the dominating power of Ο {\displaystyle \omega } will be the first term of each of these polynomials, a... | wikipedia |
25bb99da3274e7eef9f43ddfe2c279ee79c616f8 | the rows of the routh array are determined | the rows of the routh array are determined exactly by this algorithm when applied to the coefficients of (20). an observation worthy of note is that in the regular case the polynomials f 1 (Ο) {\displaystyle f_{1}(\omega)} and f 2 (Ο) {\displaystyle f_{2}(\omega)} have as the highest common factor f n + 1 (Ο) {\display... | wikipedia |
de78e0c903924e8d6a8455ff9dda730fe46218c6 | where we again denote the coefficients of the | where we again denote the coefficients of the remainder f 4 (Ο) {\displaystyle f_{4}(\omega)} by d 0 {\displaystyle d_{0}}, β d 1 {\displaystyle -d_{1}}, d 2 {\displaystyle d_{2}}, β d 3 {\displaystyle -d_{3}},making our formed remainder | wikipedia |
7b9fbc41cdc353bf3b45703aee5a44a022c694fe | and identifying the coefficients of this remainder by | and identifying the coefficients of this remainder by c 0 {\displaystyle c_{0}}, β c 1 {\displaystyle -c_{1}}, c 2 {\displaystyle c_{2}}, β c 3 {\displaystyle -c_{3}}, and so forth, makes our formed remainder | wikipedia |
cba93b66d238b9c185e14ec7699a7916a4d233f8 | where the last non-zero remainder, f m (x) | where the last non-zero remainder, f m (x) {\displaystyle f_{m}(x)} will therefore be the highest common factor of f 1 (x), f 2 (x), β¦, f m β 1 (x) {\displaystyle f_{1}(x),f_{2}(x),\dots,f_{m-1}(x)}. it can be observed that the sequence so constructed will satisfy the conditions of sturm's theorem, and thus an algorith... | wikipedia |
0806d989a2973fb78057bb96a5dad67c2da5129d | starting with f 1 (x) {\displaystyle f_{1}(x)} and | starting with f 1 (x) {\displaystyle f_{1}(x)} and f 2 (x) {\displaystyle f_{2}(x)}, and denoting the remainder of f 1 (x) / f 2 (x) {\displaystyle f_{1}(x)/f_{2}(x)} by f 3 (x) {\displaystyle f_{3}(x)} and similarly denoting the remainder of f 2 (x) / f 3 (x) {\displaystyle f_{2}(x)/f_{3}(x)} by f 4 (x) {\displaystyle... | wikipedia |
e3e0693a0804697b5cd8ca0def9ba417321986bb | and we define v (x) {\displaystyle v(x)} as | and we define v (x) {\displaystyle v(x)} as the number of changes of sign in the sequence f 1 (x), f 2 (x), β¦, f m (x) {\displaystyle f_{1}(x),f_{2}(x),\dots,f_{m}(x)} for a fixed value of x {\displaystyle x}, then: | wikipedia |
abf258c782ff38438640ccd3a5a27a16b65e1ab5 | 1) if f k (x) = 0 {\displaystyle | 1) if f k (x) = 0 {\displaystyle f_{k}(x)=0} then f k β 1 (x) β 0 {\displaystyle f_{k-1}(x)\neq 0}, f k + 1 (x) β 0 {\displaystyle f_{k+1}(x)\neq 0}, and sign = β sign {\displaystyle \operatorname {sign} =-\operatorname {sign} } | wikipedia |
71ba04236c32cfefe35d166b098ef1be18ecf48f | given a sequence of polynomials f 1 (x), | given a sequence of polynomials f 1 (x), f 2 (x), β¦, f m (x) {\displaystyle f_{1}(x),f_{2}(x),\dots,f_{m}(x)} where: | wikipedia |
bacba3c0d39a7ebd113bc8c8910311d1ed3a4b73 | sturm gives us a method for evaluating Ξ | sturm gives us a method for evaluating Ξ = i β β + β f 2 (x) f 1 (x) {\displaystyle \delta =i_{-\infty }^{+\infty }{\frac {f_{2}(x)}{f_{1}(x)}}}. his theorem states as follows: | wikipedia |
34b4ccc41d091ca3625e0890a642d84e33f7a552 | lo and behold we are evaluating the same | lo and behold we are evaluating the same cauchy index for both: Ξ = i β β + β b 0 Ο n β 1 β b 1 Ο n β 3 + β¦ a 0 Ο n β a 1 Ο n β 2 + β¦ (27) {\displaystyle \delta =i_{-\infty }^{+\infty }{\frac {b_{0}\omega ^{n-1}-b_{1}\omega ^{n-3}+\ldots }{a_{0}\omega ^{n}-a_{1}\omega ^{n-2}+\ldots }}\quad (27)} | wikipedia |
214284e672d728b7e7f7fba799b12db147108e1f | now observe that if n {\displaystyle n} is | now observe that if n {\displaystyle n} is an odd integer, then by (3) n + p {\displaystyle n+p} is odd. if n + p {\displaystyle n+p} is an odd integer, then n β p {\displaystyle n-p} is odd as well. similarly, this same argument shows that when n {\displaystyle n} is even, n β p {\displaystyle n-p} will be even. equat... | wikipedia |
7dd01ad2744ddbbb82f007e62d229f14ecc88eb0 | over said interval when our starting point is | over said interval when our starting point is at an incongruity.this difference, Ξ {\displaystyle \delta }, of negative and positive jumping incongruities encountered while traversing x {\displaystyle x} from β j β {\displaystyle -j\infty } to + j β {\displaystyle +j\infty } is called the cauchy index of the tangent of... | wikipedia |
08111cce216f51cc962056ced148ca7a9f4a852a | in the case where the starting point is | in the case where the starting point is on an incongruity (i.e. ΞΈ a = Ο / 2 Β± i Ο {\displaystyle \theta _{a}=\pi /2\pm i\pi }, i = 0, 1, 2,...) the ending point will be on an incongruity as well, by equation (17) (since n {\displaystyle n} is an integer and p {\displaystyle p} is an integer, Ξ {\displaystyle \delta } w... | wikipedia |
c549c21f5458db8d59d322c64026877f3de31327 | thus, ΞΈ (x) | β j β j | thus, ΞΈ (x) | β j β j β {\displaystyle \theta (x){\big |}_{-j\infty }^{j\infty }} is Ο {\displaystyle \pi } times the difference between the number of points at which i m / r e {\displaystyle {\mathfrak {im}}/{\mathfrak {re}}} jumps from β β {\displaystyle -\infty } to + β {\displaystyle +\infty } and the number of poi... | wikipedia |
2f4e5f048bf4eea6fe04a394bde57e5a59226ec0 | in accordance with (6) and figure 1, the | in accordance with (6) and figure 1, the graph of tan (ΞΈ) {\displaystyle \tan(\theta)} vs ΞΈ {\displaystyle \theta }, varying x {\displaystyle x} over an interval (a,b) where ΞΈ a = ΞΈ (x) | x = j a {\displaystyle \theta _{a}=\theta (x)|_{x=ja}} and ΞΈ b = ΞΈ (x) | x = j b {\displaystyle \theta _{b}=\theta (x)|_{x=jb}} are ... | wikipedia |
02d516c201cc294eb8f9050d74549d8682a94c3a | in accordance with (6) and figure 1, the | to + β {\displaystyle +\infty } one more time than it has jumped from + β {\displaystyle +\infty } to β β {\displaystyle -\infty } as x {\displaystyle x} was varied over the said interval. | wikipedia |
9ae9dc2efc56d53a9e82a66573594137955941b5 | therefore, given an equation of f (x) {\displaystyle | therefore, given an equation of f (x) {\displaystyle f(x)} of degree n {\displaystyle n} we need only evaluate this function Ξ {\displaystyle \delta } to determine n {\displaystyle n}, the number of roots with negative real parts and p {\displaystyle p}, the number of roots with positive real parts. | wikipedia |
3ca15a4eed0ab7f3965cf3f60727a960ec1c92eb | from (9) to (11) we find that ΞΈ | from (9) to (11) we find that ΞΈ r i (x) | x = β j β x = j β = β Ο {\displaystyle \theta _{r_{i}}(x){\big |}_{x=-j\infty }^{x=j\infty }=-\pi } when the i root of f (x) {\displaystyle f(x)} has a positive real part, and from (12) to (14) we find that ΞΈ r i (x) | x = β j β x = j β = Ο {\displaystyle \theta _{r_{i}}(x){\bi... | wikipedia |
85a5216e1c0edfb471fae932c203636d83ecc513 | the routh array is a tabular method permitting | the routh array is a tabular method permitting one to establish the stability of a system using only the coefficients of the characteristic polynomial. central to the field of control systems design, the routhβhurwitz theorem and routh array emerge by using the euclidean algorithm and sturm's theorem in evaluating cauc... | wikipedia |
814b5c6980cdf68f45fd01ec8ba10c612ee9b27c | the combined islands cricket team was a cricket | the combined islands cricket team was a cricket team that represented the cricket-playing islands of the lesser antilles, excluding barbados and trinidad and tobago who fielded their own teams. they played in 13 shell shield tournaments from 1965β66 to 1980β81, when they won their first title and were subsequently disb... | wikipedia |
da06e420a5ba526b14e261068da6d81bd6560e54 | out of 30 first-class home games, the most | out of 30 first-class home games, the most were played in warner park on saint kitts, which hosted seven games. the team played cricket on a total of eight different islands, with antigua getting six, saint lucia five, grenada four, dominica and saint vincent three, while montserrat and nevis hosted one game each. | wikipedia |
59bd003509a7b009a0fbc0e823b7370c82fb286c | the innings defeat was the end of the | the innings defeat was the end of the combined islands team. the west indies cricket board made the decision to split the team into windward and leeward islands, and the first match of the 1981-82 shell shield was played between these two teams - the leeward islands, whose team included 10 players who had played for th... | wikipedia |
6defec309091755f147a29babd1ae1c7f801d0a1 | finally, after four runner-up spots in the preceding | finally, after four runner-up spots in the preceding six seasons, it was the combined islands' turn to win the shell shield trophy in 1980-81. after starting with a draw in trinidad, the combined islands won both home games - first an innings win over jamaica, in which andy roberts took 11 for 101 and completed a hat-t... | wikipedia |
44c6ea52ed4b0ed338ec57d0568c2db9b3130eb0 | the next season saw the combined islands return | the next season saw the combined islands return to the runners-up spot, after winning two games in a season for the first time, and before the final game in barbados they trailed their hosts by 11 points after a drawn game in trinidad two weeks earlier. after being put in the field by the barbados captain, combined isl... | wikipedia |
1e1b33b24c8f43bd48862c6141fa60094e6b7de4 | the combined islands finished second for the third | the combined islands finished second for the third time in four seasons in 1977-78, but this time they were in last place before the final round, when they beat trinidad and tobago by seven wickets to avoid the last place and propel themselves up the table to a shared second place with jamaica. all-rounder norbert phil... | wikipedia |
e922feac63c6007580c2eed13e37389c0601f898 | the next season saw them fall back to | the next season saw them fall back to fourth place, however, with none of the four matches seeing more than 325 overs of play in four days as the combined islands drew all four games β with two ending before the first innings were completed. irvine shillingford still managed to hit 257 runs in his three innings, averag... | wikipedia |
b02cf6d2a16c654aee3e8c441ae9c54a13663b80 | the next season, they got their best position | the next season, they got their best position in the shell shield thus far, going unbeaten through the season and also recording their first away win β a 163-run win over barbados, their highest win yet, which also included a second-innings century from allen and a new record bowling analysis of six for 35 from roberts... | wikipedia |
22b8af234ff2d33bf96dd62f0921879bdf0e8c7a | in 1970β71, the combined islands registered their first | in 1970β71, the combined islands registered their first win in five years, but still finished last behind guyana β despite beating guyana by 50 runs, the team lost their other three matches, and guyana finished two points ahead. the 1971β72 season went by without a single win, although they gained a lead on first innin... | wikipedia |
52c4402c83cd6e4950babf16f7434eda17baad2f | it took a further four seasons before the | it took a further four seasons before the combined islands returned to the shell shield β the leeward and windward teams played games, but the matches they played did not count for points. the combined team was back for the 1969β70 tournament, though, and duly lost all four games, with no player averaging more than 26 ... | wikipedia |
308effd0298916b122b250e9da04853112b543d5 | in 1965β66, the team was among the five | in 1965β66, the team was among the five that played for the inaugural shell shield. after two draws against jamaica and barbados, the team went down to british guiana, before winning the last game against trinidad and tobago to finish third in the table and record their first victory. | wikipedia |
12f435fa1ca6a833b0392023b348742d836616d5 | the combined islands played 54 first-class games, winning | the combined islands played 54 first-class games, winning 11, drawing 19 and losing 24. 52 of those games were in the shell shield tournament, with the other two games both coming in the 1961β62 season β a pentangular tournament preliminary round loss to british guiana, was followed by a home defeat to the touring indi... | wikipedia |
814b5c6980cdf68f45fd01ec8ba10c612ee9b27c | the combined islands cricket team was a cricket | the combined islands cricket team was a cricket team that represented the cricket-playing islands of the lesser antilles, excluding barbados and trinidad and tobago who fielded their own teams. they played in 13 shell shield tournaments from 1965β66 to 1980β81, when they won their first title and were subsequently disb... | wikipedia |
6ec3208b7d88f80471d5b917cb0d8314a3fb5de4 | ceramidase is an enzyme which cleaves fatty acids | ceramidase is an enzyme which cleaves fatty acids from ceramide, producing sphingosine (sph) which in turn is phosphorylated by a sphingosine kinase to form sphingosine-1-phosphate (s1p). | wikipedia |
ed5ed0588642815b583e039fafcffeadf01f16b8 | human neutral ceramidase (ncdase) is an enzyme that | human neutral ceramidase (ncdase) is an enzyme that plays a critical role in colon cancer and there are currently no potent or clinically effective inhibitors for ncdase reported to date. inhibitors of ncdase were identified via a high-throughput screening effort of large chemical libraries at scripps research. multipl... | wikipedia |
abb55fd3f23d212c734062b3e4e2c20e225f35b7 | ceramidase (ec 3.5.1.23, acylsphingosine deacylase, glycosphingolipid ceramide deacylase) | ceramidase (ec 3.5.1.23, acylsphingosine deacylase, glycosphingolipid ceramide deacylase) is an enzyme which cleaves fatty acids from ceramide, producing sphingosine (sph) which in turn is phosphorylated by a sphingosine kinase to form sphingosine-1-phosphate (s1p). | wikipedia |
d6cbb140bef28cdd11f12bbffb1ee442117948a8 | candy is the seventh single of the 12 | candy is the seventh single of the 12 singles collection by japanese artist kumi koda. the single featured rapper mr. blistah from clench & blistah, and became her second to feature an artist β her first being "d.d.d.," which featured soulhead. as with the majority of the singles in the collection, the single was limit... | wikipedia |
ec9e726b07e804427ac4e55e2aefa40232336eb5 | unlike the other music videos, which featured the | unlike the other music videos, which featured the love interests discussing heartbreak, "candy" opened with narration spoken in english. the video carried the theme of a wealthy prince from the underworld, played by mr. blistah, attempting to buy the affection and love of the princess of the sky, played by kumi, who ha... | wikipedia |
140f2e10ff02b066d5dcfe2965c794fc63d1fe90 | while "candy" was the seventh single released in | while "candy" was the seventh single released in the collection, its accompanying music video was the prelude to the story-line driven videos, " you," " lies," " feel " and, ultimately, " someday." the video opened with narration, done in english. | wikipedia |
268b32b7d35eae8b586853ed44171cd1bd1ba554 | the song was written and produced by daisuke | the song was written and produced by daisuke "d.i" imai, who had worked with kumi several times in the past and would work with her many times in the future. daisuke has been producing music in japan and for avex artists since 1999. while the song's score was written by daisuke, kumi and blistah co-wrote the lyrics. ku... | wikipedia |
ac26a6d98c59f8634947f4c71d0dab05b3910222 | each single in the 12 singles collection had | each single in the 12 singles collection had unique cover art based on certain cultures in various countries. the back cover of each single was a piece to a puzzle, which could only be completed by purchasing all twelve singles. the same was done for the obi strips, which contained a full image when arranged together i... | wikipedia |
5d2ef0ce44c9073a79683d2ebda803c764dafc82 | the single ranked in the top five on | the single ranked in the top five on the charts, taking the no. 3 spot on the oricon singles charts, and remained on the charts for seven weeks. as with many of the other singles in the collection, this single was also limited 50,000 copies. | wikipedia |
c5493a25052bf68f30ee7e683e5b3d41da437cf7 | candy is singer-songwriter kumi koda 's seventh single | candy is singer-songwriter kumi koda 's seventh single released in her 12 singles collection and twenty-fifth overall single. the single became her second in the series to feature an artist β her first being " d.d.d.," which featured sister-duo soulhead β and featured rapper mr. blistah from the rap duo clench & blista... | wikipedia |
5b8069fbdedcb6d5417834c0ed46356c96f60479 | candy is the seventh single of the 12 | candy is the seventh single of the 12 singles collection by japanese artist kumi koda. the single featured rapper mr. blistah from clench & blistah, and became her second to feature an artist β her first being " d.d.d.," which featured soulhead. as with the majority of the singles in the collection, the single was limi... | wikipedia |
cde9d36551e387f33868c7b3270ad43cebb39681 | douglas sharon is a canadian cultural anthropologist (ucla), | douglas sharon is a canadian cultural anthropologist (ucla), ethnobotanist and shamanism scholar who has directed both the university of california/berkeley's phoebe hearst museum of anthropology and the san diego museum of man. he has conducted more than 40 years of field research and published on pre-columbian and mo... | wikipedia |
b17a3c30b9c94501f2a304a8a7fc38cb4b299e9f | his ethnographic film entitled eduardo the healer is | his ethnographic film entitled eduardo the healer is utilized in university-level anthropology courses and has won awards at the american, modern language, and john muir medical film festivals. sharon directs projects in cultural anthropology and lectures internationally on the integration of traditional healing practi... | wikipedia |
88282295ad3227e04ead4662799ca871f8ff747d | douglas sharon is a canadian cultural anthropologist (ucla), | douglas sharon is a canadian cultural anthropologist (ucla), ethnobotanist and shamanism scholar who has directed both the university of california/berkeley's phoebe hearst museum of anthropology and the san diego museum of man. he has conducted more than 40 years of field research and published on pre-columbian and mo... | wikipedia |
590ca5c7d72093fd405df2823ad45974b40f5d95 | he was recalled to the national team in | he was recalled to the national team in october 2018. on 13 october, he was one of south africa's goalscorers as the nation recorded its largest ever victory with a 6β0 win over seychelles in an africa cup of nations qualifier. | wikipedia |
48fef22ae59bc3f8f02f1210e14e6e425d5a84ce | on 12 august 2016 fk qarabaΔ announced they | on 12 august 2016 fk qarabaΔ announced they had signed ndlovu to a two-year contract. during the 2017β18 uefa champions league campaign, ndlovu scored an away goal against fc copenhagen which helped qarabaΔ qualify for the group stages of the tournament for the first time in the club's history | wikipedia |
41d0afe228346808f5ef033c8031720438776b05 | ndlovu hails from jouberton near klerksdorp. during his | ndlovu hails from jouberton near klerksdorp. during his formative years, ndlovu began playing soccer on the streets and when he was sixteen, he was afforded the opportunity to join an academy of excellence. he had to turn down the opportunity, however as it would have left his mother alone at home. he later traveled to... | wikipedia |
265bf7531bad4a510c5579cfcae695710346831b | chemical milling or industrial etching is the subtractive | chemical milling or industrial etching is the subtractive manufacturing process of using baths of temperature-regulated etching chemicals to remove material to create an object with the desired shape. other names for chemical etching include photo etching, chemical etching, photo chemical etching and photochemical mach... | wikipedia |
32c7f30540217af7302a4710725aa56b06042271 | demasking is the process of clearing the part | demasking is the process of clearing the part of etchant and maskant. etchant is generally removed with a wash of clear, cold water. a de-oxidizing bath may also be required in the common case that the etching process left a film of oxide on the surface of the material. various methods may be used to remove the maskant... | wikipedia |
c4efce1bbbcfdb6936dad73d83c89b649c1687b4 | where e is the rate of etching (usually | where e is the rate of etching (usually abbreviated to etch rate), s is the depth of the cut required, and t is the total immersion time. etch rate varies based on factors such as the concentration and composition of the etchant, the material to be etched, and temperature conditions. due to its inconstant nature, etch ... | wikipedia |
f3908c6560f0f5e93dfcdb6dae91aa2504e51b70 | etching is the immersion of the part into | etching is the immersion of the part into the chemical bath, and the action of the chemical on the part to be milled. the time spent immersed in the chemical bath determines the depth of the resulting etch; this time is calculated via the formula: | wikipedia |
b824490e8ef93548a65af1bb726e78df57413ee9 | scribing is the removal of maskant on the | scribing is the removal of maskant on the areas to be etched. for decorative applications, this is often done by hand through the use of a scribing knife, etching needle or similar tool; modern industrial applications may involve an operator scribing with the aid of a template or use computer numerical control to autom... | wikipedia |
4ffd5637a355c706fd6854754e80a8fbd837f920 | the maskant to be used is determined primarily | the maskant to be used is determined primarily by the chemical used to etch the material, and the material itself. the maskant must adhere to the surface of the material, and it must also be chemically inert enough with regard to the etchant to protect the workpiece. most modern chemical milling processes use maskants ... | wikipedia |
43f3eafe12e9d71dce1578107d81f19bc6046c48 | masking is the process of applying the maskant | masking is the process of applying the maskant material to the surface to ensure that only desired areas are etched. liquid maskants may be applied via dip-masking, in which the part is dipped into an open tank of maskant and then the maskant dried. maskant may also be applied by flow coating: liquid maskant is flowed ... | wikipedia |
93c66fa860145057e2ad7ddf2f497acbcff14c92 | cleaning is the preparatory process of ensuring that | cleaning is the preparatory process of ensuring that the surface to be etched is free of contaminants which could negatively impact the quality of the finished part. an improperly cleaned surface could result in poor adhesion of the maskant, causing areas to be etched erroneously, or a non-uniform etch rate which could... | wikipedia |
6ff9c4acc1a80157773feb934ac5432d731aa172 | etching has applications in the printed circuit board | etching has applications in the printed circuit board and semiconductor fabrication industries. it is also used in the aerospace industry to remove shallow layers of material from large aircraft components, missile skin panels, and extruded parts for airframes. etching is used widely to manufacture integrated circuits ... | wikipedia |
c0762ef1f8c505c55ab8c1fdd44756eb48686b06 | one of the earliest uses of chemical etching | one of the earliest uses of chemical etching to mill commercial parts was in 1927, when the swedish company aktiebolaget separator patented a method of producing edge filters by chemically milling the gaps in the filters. later, around the 1940s, it became widely used to machine thin samples of very hard metal; photo-e... | wikipedia |
3bd60f0bdbc71b25d8b6c3bf4957bcfac1fdee99 | in 1782, the discovery was made by john | in 1782, the discovery was made by john senebier that certain resins lost their solubility to turpentine when exposed to light; that is, they hardened. this allowed the development of photochemical milling, where a liquid maskant is applied to the entire surface of a material, and the outline of the area to be masked c... | wikipedia |
af8b8bdfec470946f6ce7edf7ef3985fab8b9dac | armor etching, using strong mineral acids, was not | armor etching, using strong mineral acids, was not developed until the fifteenth century. etchants mixed from salt, charcoal, and vinegar were applied to plate armor that had been painted with a maskant of linseed-oil paint. the etchant would bite into the unprotected areas, causing the painted areas to be raised into ... | wikipedia |
eaed7f307b99dbe0a3bfad81ceea64d11d58487f | organic chemicals such as lactic acid and citric | organic chemicals such as lactic acid and citric acid have been used to etch metals and create products as early as 400 bce, when vinegar was used to corrode lead and create the pigment ceruse, also known as white lead. most modern chemical milling methods involve alkaline etchants; these may have been used as early as... | wikipedia |
265bf7531bad4a510c5579cfcae695710346831b | chemical milling or industrial etching is the subtractive | chemical milling or industrial etching is the subtractive manufacturing process of using baths of temperature-regulated etching chemicals to remove material to create an object with the desired shape. other names for chemical etching include photo etching, chemical etching, photo chemical etching and photochemical mach... | wikipedia |
f8756ad8b9de10abffabe850b8ee52ca162fee69 | he was elected a fellow of the royal | he was elected a fellow of the royal society of new zealand in 1962, and in 1969 he won the society's hector medal, at that time new zealand's highest science prize. he received the mineralogical society of america award in 1963. in the 2002 new year honours, coombs was appointed a companion of the new zealand order of... | wikipedia |
934af410fa8b3850240f18268a564be910983d2b | coombs went on to study at the university | coombs went on to study at the university of otago, graduating with a bachelor of science degree in 1946 and master of science with first-class honours in 1948. he then studied at the university of cambridge, where he was awarded a phd in 1952. | wikipedia |
43460f4ab322a3e919fdc68b044bfbbdbabc7289 | born in the dunedin suburb of st clair | born in the dunedin suburb of st clair on 23 november 1924, coombs was the son of architect leslie douglas coombs and nellie vera von tunzelmann coombs (nΓ©e saxon), and the nephew of ken saxon. he was educated at king's high school, and played cricket for otago in the 1942β43 season as a right-hand batsman and leg-brea... | wikipedia |
86947638cbb9cdbf08f884702c7034da3cc5b83a | charles matthew "chuck" geschke was an american businessman | charles matthew "chuck" geschke was an american businessman and computer scientist best known for founding the graphics and publishing software company adobe inc. with john warnock in 1982, with whom he also co-created the pdf document format. | wikipedia |
d1ac8edf0bd4af3ae5fe25ac53da88737aa8d95e | geschke's mother was a bankruptcy court paralegal. both | geschke's mother was a bankruptcy court paralegal. both geschke's father and paternal grandfather worked as letterpress photo engravers. geschke's father helped during the early days of adobe by checking color separation work with his engraver's loupe. geschke described his father's acknowledg ment of the high quality ... | wikipedia |
b50b2b1f72d2c497cbfe83fb8fd1a17363dba164 | geschke was a catholic and met his wife | geschke was a catholic and met his wife nancy "nan" mcdonough at a religious conference on social action in the spring of 1961. they married in 1964. both were graduates of catholic institutions. in 2012 they received the st. elizabeth ann seton award from the national catholic educational association (ncea) for their ... | wikipedia |
8c30c8ce46b3cf518297e5a96b0f42fade8b41d7 | in 1995, he was elected to the national | in 1995, he was elected to the national academy of engineering. in 2008, he was elected to the american academy of arts and sciences. in 2010, he completed his term as chairman of the board of trustees of the university of san francisco. in 2012, he was elected to the american philosophical society. | wikipedia |
99aa89b3212ff641183dbad4da6478f8ea07e012 | geschke was on the boards of the san | geschke was on the boards of the san francisco symphony, the national leadership roundtable on church management, the commonwealth club of california, tableau software, the egan maritime foundation, and the nantucket boys and girls club. he was also a member of the computer science advisory board at carnegie mellon uni... | wikipedia |
d7ff51c40e87ae02eab1de9ebd0a7994254e0b2e | on sunday, may 20, 2012, geschke delivered the | on sunday, may 20, 2012, geschke delivered the commencement speech at john carroll university in university heights, ohio, where he had been a mathematics professor early in his career and was awarded an honorary doctorate of humane letters. | wikipedia |
26a13f5cb9ab6cd56ff51c6789843535c226b2c6 | in october 2006, geschke, along with co-founder john | in october 2006, geschke, along with co-founder john warnock received the annual aea medal of achievement, making them the first software executives to receive this award. in 2008 he received the computer entrepreneur award from the ieee computer society. he also won the 2008 national medal of technology and innovation... | wikipedia |
024982aa698673471a6aa99216b37bf701e869e8 | on the morning of may 26, 1992, as | on the morning of may 26, 1992, as geschke was arriving for work in mountain view, california, he was kidnapped at gunpoint from the adobe parking lot by two men, mouhannad albukhari, 26, of san jose, and jack sayeh, 25, of campbell. a spokesperson for the fbi reported that the agency had monitored phone calls that the... | wikipedia |
16ce10731733c50f296e46f2b5e9a339e8d0643e | from december 1986 until july 1994, geschke was | from december 1986 until july 1994, geschke was adobe's chief operating officer, and from april 1989 until april 2000 he was the company's president. geschke retired as president of adobe in 2000, shortly before his partner warnock left as ceo. geschke had also been co-chairman of the board of adobe from september 1997... | wikipedia |
22dd59237f89b222af8133fb1996c412b7aeef92 | geschke and warnock founded adobe in warnock's garage | geschke and warnock founded adobe in warnock's garage in 1982, naming the company after the adobe creek that ran behind warnock's home. interpress eventually evolved into postscript. its use on apple computers resulted in one of the first desktop publishing (dtp) systems which allowed users to compose documents on a pe... | wikipedia |
1996565885039d1d01a5a4517ed3005b0bbc51fb | in 1978, geschke started the imaging sciences laboratory | in 1978, geschke started the imaging sciences laboratory at parc, and conducted research in the areas of graphics, optics, and image processing. he hired john warnock, and together they developed interpress, a page description language (pdl) that could describe forms as complex as typefaces. unable to convince xerox ma... | wikipedia |
525eeca02cb80d0d5b0c012a9f4c0cbcfcededd1 | geschke started working at xerox 's palo alto | geschke started working at xerox 's palo alto research center (parc) in october 1972. his first project was to build a mainframe computer. afterward, he worked on programming languages and developed tools that were used to build the xerox star workstation. | wikipedia |
30a9b46b06f14ff4cb6535af70c89e87556e0a29 | geschke earned an ab in classics in 1962 | geschke earned an ab in classics in 1962 and an ms in mathematics in 1963, both from xavier university. he taught mathematics at john carroll university from 1963 to 1968. in 1972, he completed his phd studies in computer science at carnegie mellon university under the advice of william wulf. he was a co-author of wulf... | wikipedia |
03cf9fbccc702c2835224fc992d129fcd617ad32 | charles matthew " chuck " geschke (september 11, | charles matthew " chuck " geschke (september 11, 1939 β april 16, 2021) was an american businessman and computer scientist best known for founding the graphics and publishing software company adobe inc. with john warnock in 1982, with whom he also co-created the pdf document format. | wikipedia |
d0f9c3817fb16c1ba7554b19567d0635cdc676bc | elizabeth a. rauscher (1937β2019) was an american physicist | elizabeth a. rauscher (1937β2019) was an american physicist and parapsychologist. she was born in berkeley, california on march 18, 1937. she died on july 3, 2019. she was a former researcher with the lawrence berkeley national laboratory, lawrence livermore national laboratory, the stanford research institute, and nas... | wikipedia |
64db5e8cf711f3d13ffa0358b55bce4e863ecfde | starting in the early 1980s with her husbandβwilliam | starting in the early 1980s with her husbandβwilliam van bise, an engineerβshe researched the effects of electromagnetic fields on biological systems to enhance health. in the 1990s, rauscher and van bise, moved to an estate in devotion, north carolina, owned by richard j. reynolds iii, grandson of r. j. reynolds, the ... | wikipedia |
f78eb68b930616fbfb9e98029c5aaa8340d16c05 | kaiser describes how rauscher's personal interests within the | kaiser describes how rauscher's personal interests within the group lay with remote viewing, precognition, psychokinesis, remote healing, and ghosts. jeffrey john kripal writes that rauscher broadened the group to include non-physicists, and in the late 1970s and early 1980s the group's members met annually at the esal... | wikipedia |
aba2941a8c956b1871ffaa739f8a8b5d4a80e4e0 | at berkeley in may 1975, she and george | at berkeley in may 1975, she and george weissmann co-founded the fundamental fysiks group, an informal group of physicists who met for friday afternoon brainstorming sessions to explore the philosophical problems posed by quantum physics, particularly the relationship between physics and consciousness. she named and ch... | wikipedia |
b9215523c21751f7cbb200c70926da10420b3824 | she later held positions as professor of physics | she later held positions as professor of physics and general science at john f. kennedy university, 1978β1984; research consultant to nasa, 1983β1985; and professor and graduate student adviser in the department of physics at the university of nevada, reno, 1990β1998. | wikipedia |
42db1e0bfbbc2be3dc5403128dc3b455b8077162 | she married and had a son, and when | she married and had a son, and when she became their sole provider took a job as a staff scientist at the lawrence livermore national laboratory. when her son was old enough, she returned to berkeley to begin her phd under glenn seaborg, the nuclear chemist. she continued by working at lawrence berkeley national labora... | wikipedia |
7b691df191ce8eebb5aa2fa38f7fb862a55d9fb4 | in how the hippies saved physics (2011), kaiser | in how the hippies saved physics (2011), kaiser writes that rauscher had always been interested in science, and as a child had designed and built her own telescopes. raised near berkeley, she started hanging around the lawrence berkeley laboratory when she was in high school. she enrolled at berkeley for her first degr... | wikipedia |
17fa1b1084b320f4b0f56f9436bfd9f397f91c55 | in 1975 rauscher co-founded the berkeley fundamental fysiks | in 1975 rauscher co-founded the berkeley fundamental fysiks group, an informal group of physicists who met weekly to discuss quantum mysticism and the philosophy of quantum physics. david kaiser argued in his book, how the hippies saved physics that this group helped to nurture ideas which were unpopular at the time wi... | wikipedia |
4c9736c6084bd49b55e5ca15d3ee4b4dde3f47d5 | elizabeth a. rauscher (1937β2019) was an american physicist | elizabeth a. rauscher (1937β2019) was an american physicist and parapsychologist. she was born in berkeley, california on march 18, 1937. she died on july 3, 2019 (aged 82). | wikipedia |
3c3763133bcbb220a7b8228b6c8fe9330f2155a3 | dmitriy g. stankevich is a ukrainian astronomer, specialist | dmitriy g. stankevich is a ukrainian astronomer, specialist in computer modeling of light scattering by regoliths of planets and the moon, as well as in digital processing of astronomical images. winner of the state prize of the ukrainian ssr in science and technology (1986). | wikipedia |
5e287d90d6b504ad019df2e9246e3de7e3106e66 | since 2001, stankevich has been working as an | since 2001, stankevich has been working as an associate professor at the department of astronomy at the school of physics of kharkiv university. he teaches general astronomy, theoretical astrophysics, and computer technologies in astronomy. he also directs bachelor's and master's theses of students, supervises research... | wikipedia |
dfba016afedaeb14befaba22b3c7e084e5351714 | in 1988 stankevich moved to work at kharkiv | in 1988 stankevich moved to work at kharkiv university. he continued his research on processing of astronomical and space images, and worked on the issues of light scattering by surfaces of celestial bodies. in 1989 he defended his phd thesis "investigation of the surface of venus by digital image processing methods". | wikipedia |
90a2c169cd4f10588896516283606b4974acb52a | in 1978, dmitriy g. stankevich graduated from kharkiv | in 1978, dmitriy g. stankevich graduated from kharkiv state university. he worked at the institute for radiophysics and electronics of the academy of sciences of the ukrainian ssr on the development of software and hardware for digital processing of astronomical and space images. for these works, he received the state ... | wikipedia |
ae93d68310d5c8966c133e7ddd8982299ae42ba8 | dmitriy g. stankevich (born 1956) is a ukrainian | dmitriy g. stankevich (born 1956) is a ukrainian astronomer, specialist in computer modeling of light scattering by regoliths of planets and the moon, as well as in digital processing of astronomical images. winner of the state prize of the ukrainian ssr in science and technology (1986). | wikipedia |
6fd84df7c77d63f69089a9d49df3e862330c5298 | donald richard ort is an american botanist and | donald richard ort is an american botanist and biochemist. he is the robert emerson professor of plant biology and crop sciences at the university of illinois at urbana-champaign where he works on improving crop productivity and resilience to climate change by redesigning photosynthesis. he is a member of the national ... | wikipedia |
a213e2e7342a84260720aefdf717a52bc167c2fd | the agricultural research service recognized ort as the | the agricultural research service recognized ort as the senior area midwest researcher of the year in 1993 and as a supergrade scientist in 2003. he was also a recipient of various merit awards from the united states department of agriculture. the college of agricultural, consumer and environmental sciences (aces) reco... | wikipedia |
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