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3d4cc32fe3a4b4399c989e79c8bb75e9b52a95a2
the book follows lieutenant nicholas lord ramage and
the book follows lieutenant nicholas lord ramage and his experiences commanding the cutter hms kathleen. dispatched by commodore horatio nelson to carry messages to gibraltar while transporting the italians refugees rescued in ramage. during the voyage, the marchesa and ramage exchange rings through a faked shooting co...
wikipedia
d66c9212aaddc17f614a14f82565e27ee073865b
ramage and the drum beat, later republished as
ramage and the drum beat, later republished as ramage and the drumbeat and as drumbeat is an historical novel by dudley pope, set during 1796 and 1797 amongst the naval warfare of the french revolutionary wars. it is the second of the ramage novels, following on from ramage. during the book, ramage becomes an integral ...
wikipedia
c4906e9e9525011aa66bccaaea7e905137cb2ae0
paul richard mara is an american former professional
paul richard mara is an american former professional ice hockey defenceman, and current head coach of the boston pride in the phf. he was selected 7th overall by the tampa bay lightning in the 1997 nhl entry draft, and went on to play 12 seasons in the national hockey league.
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ddec064f1c2db640880efc66595d2a71cc34f220
mara was a member of the 1996–97, 1997–98,
mara was a member of the 1996–97, 1997–98, and 1998–99 united states world junior championship teams. he also played for the united states at the 2004 world championships in prague, czech republic.
wikipedia
a841747f22ee698a2745024c2ee0ad1c91c44398
mara was born in ridgewood, new jersey and
mara was born in ridgewood, new jersey and despite his birthplace, he is of no relation to the family of wellington mara, who were known for their ownership of the nfl 's new york giants. mara was raised in belmont, massachusetts.
wikipedia
b46b54232d58f00fd45842d0a953b091bb41a5b4
mara was the assistant coach of the 2018
mara was the assistant coach of the 2018 olympic united states women's national ice hockey team. on may 30, 2018, mara was named head coach of the phf's (formerly nwhl) boston pride. he is currently the head coach with the most wins in phf history, and one of only two coaches to win more than 30 games. mara became the ...
wikipedia
400d768e077cd58d79ce6902c879e08f8c0f7400
on september 16, 2010, mara signed with the
on september 16, 2010, mara signed with the anaheim ducks for one year at $750,000. after appearing in 33 games with the ducks to start the 2010–11 season, on february 16, 2011, mara was traded by the ducks to the montreal canadiens in exchange for a 2012 5th round draft pick. he took a brief break from hockey during t...
wikipedia
8113ba9dd8ebc0ebd42a7602c94a3eebbe42cb42
on february 27, 2007, mara was traded to
on february 27, 2007, mara was traded to the new york rangers for aaron ward. on july 4, 2008, mara re-signed with the rangers for one year at $1.95 million.
wikipedia
4f4b3476a4e46af1998a99e39bd1eba7491798e5
mara was drafted in the first round, 7th
mara was drafted in the first round, 7th overall, in the 1997 nhl entry draft by the tampa bay lightning. he spent two seasons between the lightning and their ihl affiliate team the detroit vipers before being traded to the phoenix coyotes in 2001. he played 81 games with the coyotes in 2003-04. during the 2004 nhl loc...
wikipedia
2c9d6ff7ff9e754b86fff30d281a5479e1e9d50b
after playing two seasons of high school level
after playing two seasons of high school level hockey in massachusetts for belmont hill school paul mara joined the sudbury wolves of the ontario hockey league for the 1996–97 season. as part of a three team trade with the windsor spitfires mara was traded to the plymouth whalers on december 16, 1997. in reflecting on ...
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8572bcdad69c33129e652ca21e3756ff9ffbe799
petteri wirtanen is a finnish professional ice hockey
petteri wirtanen is a finnish professional ice hockey forward currently playing with hc tps in the liiga. wirtanen was selected 172nd overall in the 6th round of the 2006 nhl entry draft by the anaheim ducks.
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37034ddd14a57558e633081a2e46640f6f0fcfa9
after stints with hc donbass and hc fribourg-gottéron,
after stints with hc donbass and hc fribourg-gottéron, wirtanen returned to the khl in signing an initial two-year contract with finnish club, jokerit, on november 14, 2014.
wikipedia
d8bd23b6b911df7315c23facce40015f178ae15a
at the conclusion of his rookie contract, wirtanen
at the conclusion of his rookie contract, wirtanen opted to return to finland in signing a multi-year contract with hifk on july 28, 2009. he helped hifk capture the finnish liiga title, his second, in 2011.
wikipedia
296799bfa914d8bbb93cc83c7df79c18df4df517
wirtanen spent his first full north american season
wirtanen spent his first full north american season with the ducks' american hockey league affiliate, the portland pirates for the 2006–07 campaign. he recorded 7 goals and 18 points in 67 games. in the following season he made his nhl debut for the ducks on october 17, 2007. appearing in just 3 games for 1 goal.
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9e7bde496d2bc86be5c3bb32e6a54be0f58e3493
wirtanen played as a youth within hpk. he
wirtanen played as a youth within hpk. he made his professional debut with the club at the sm-liiga level during the 2004–05 season. in the following season he became a finnish champion with hpk in 2006. he was signed to a three-year, entry-level contract with the anaheim ducks on july 27, 2006.
wikipedia
9b3ab66175a8744f330c20c8254ca1d99ed69d00
petteri wirtanen (born may 28, 1986) is a
petteri wirtanen (born may 28, 1986) is a finnish professional ice hockey forward currently playing with hc tps in the liiga. wirtanen was selected 172nd overall in the 6th round of the 2006 nhl entry draft by the anaheim ducks.
wikipedia
5b38139c37d20757c8e2d96704bda13409774dde
everton sousa soares, usually known as just everton
everton sousa soares, usually known as just everton or everton cebolinha, is a brazilian professional footballer who plays as a forward for campeonato brasileiro série a club flamengo and the brazil national team.
wikipedia
9dae393c1189e3400d174164921e8643d0dc6e21
everton got the nickname cebola (onion in portuguese)
everton got the nickname cebola (onion in portuguese) from his grêmio teammate pará, however, with the arrival of uruguayan new transfer cristian rodríguez, who's also known as cebolla, everton came to be called cebolinha in reference to the cartoon character jimmy five (cebolinha in brazil), of monica's gang.
wikipedia
e44d4d8cfe7f45463ea9fd31577e6237f23a02c5
in the 2019 copa américa final on 7
in the 2019 copa américa final on 7 july, at the maracanã stadium, everton scored the opening goal in an eventual 3–1 win over peru, and was named man of the match; he also finished the tournament as the top scorer with 3 goals, alongside peru's paolo guerrero, but won the golden boot award due to having played fewer m...
wikipedia
573237faec84de353f48c51774c927b6490e54ec
in may 2019, he was included in brazil's
in may 2019, he was included in brazil's 23-man squad for the 2019 copa américa on home soil. he scored his first ever international goal in brazil's opening game of the tournament, netting the final goal in a 3–0 win against bolivia on 15 june. seven days later, everton scored his second international goal against per...
wikipedia
236437d8caec5e06c358330ea6a385200c637b05
on 17 august 2018, everton was called up
on 17 august 2018, everton was called up by coach tite for friendly matches against united states, and el salvador. thus, everton was in the first list of brazil after the 2018 fifa world cup.
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27ce09290f9e8ab696a50083e31f4bc4d98bea89
on 15 august 2016, everton renewed his contract
on 15 august 2016, everton renewed his contract with grêmio until 2020. on 23 november, in the first leg of the 2016 copa do brasil finals, he came on as a late substitute for douglas and scored the 3rd goal in a 3–1 away win against atlético mineiro; he was a starter in the second leg, a 1–1 home draw which granted th...
wikipedia
4b2377a19f81a7ce56f1823023e94fc86d07111b
everton made his série a debut on 20
everton made his série a debut on 20 april 2014, replacing pará in a 1–0 away loss against athletico paranaense. rarely used during the tournament, he started to feature more regularly during the 2015 campaign, scoring his first goal in the top tier on 6 september in a 2–1 home success over goiás.
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91e47085d7c9d7b5b4c14a21e4a018ad1b1b2fe0
promoted to the main squad by enderson moreira
promoted to the main squad by enderson moreira ahead of the 2014 season, everton made his first team debut on 19 january of that year, coming on as a second-half substitute for yuri mamute in a 1–0 campeonato gaúcho away loss against são josé-pa. his first goal came on four days later, as he scored the first goal in a ...
wikipedia
3a2106ac03771b2cd730f558956cb78b79172c54
everton was born in maracanaú, ceará, and joined
everton was born in maracanaú, ceará, and joined grêmio 's youth setup in 2012, from fortaleza. initially on loan, he signed a permanent contract in october 2013, whilst also being linked to manchester city in the process.
wikipedia
acb6e72e4150c1628d0afa554db8ea42f37e1f77
everton sousa soares (born 22 march 1996), usually
everton sousa soares (born 22 march 1996), usually known as just everton (brazilian portuguese:) or everton cebolinha (" jimmy five " in portuguese), is a brazilian professional footballer who plays as a forward for campeonato brasileiro série a club flamengo and the brazil national team.
wikipedia
ebe12adcbb412a5757677defa1b2df925089cb6c
the tony award for best performance by a
the tony award for best performance by a leading actor in a musical is an honor presented at the tony awards, a ceremony established in 1947 as the antoinette perry awards for excellence in theatre, to actors for quality leading roles in a musical play, whether a new production or a revival. the awards are named after ...
wikipedia
f463841460ce19701c136bb2028fd6e4649975ca
† – most of the leading male characters
† – most of the leading male characters in little me are played by the same actor, but the actual roles vary. in the original 1962 broadway production and the 1998 revival, sid caesar and martin short (respectively) played noble eggleston, amos pinchley, val du val, fred poitrine, otto schnitzler, and prince cherney. c...
wikipedia
b7717241020c1959a0792d9e0ee78b75f99dc6a9
nine actors hold the record for having the
nine actors hold the record for having the most wins in this category, with a total of two. john cullum, brian d'arcy james and raul julia are tied with the most nominations, with a total of four. pseudolus in a funny thing happened on the way to the forum is the character to take the award the most times, winning thre...
wikipedia
7b9f1437f5f9e4535bf90f2cdf74329a05f69de0
the award was originally called the tony award
the award was originally called the tony award for actors—musical. it was first presented to paul hartman at the 2nd tony awards for his portrayal of various characters in angel in the wings. before 1956, nominees' names were not made public; the change was made by the awards committee to "have a greater impact on thea...
wikipedia
22f2c3ed2892f9b4bb8447bc4daed6f34440d4ba
the tony award for best performance by a
the tony award for best performance by a leading actor in a musical is an honor presented at the tony awards, a ceremony established in 1947 as the antoinette perry awards for excellence in theatre, to actors for quality leading roles in a musical play, whether a new production or a revival. the awards are named after ...
wikipedia
69e81196061a86811aab119ad6d7b166ed0de58c
includes all competitions. the list is sorted by
includes all competitions. the list is sorted by squad number when total clean sheets are equal. numbers in parentheses represent games where both goalkeepers participated and both kept a clean sheet; the number in parentheses is awarded to the goalkeeper who was substituted on, whilst a full clean sheet is awarded to ...
wikipedia
f9ce0fa00895338ff5a728ecba8040843af4648c
ryan winterton is a canadian professional ice hockey
ryan winterton is a canadian professional ice hockey centre for the coachella valley firebirds of the american hockey league (ahl) as a prospect under contract to the seattle kraken of the national hockey league (nhl). he was selected sixty-seventh overall by the kraken in the 2021 nhl entry draft.
wikipedia
06f01629c5ce57bec3659b5a445d6f49c1d92cd0
following the signing of the contract, winterton participated
following the signing of the contract, winterton participated in the kraken's training camp ahead of the 2023–24 season. he was cut from training camp on september 29 and re-assigned to their american hockey league (ahl) affiliate, the coachella valley firebirds, to start the season. winterton made his professional deb...
wikipedia
5465c4ed875205c0a39a9f3a854dbc3d2f1887ba
following the draft, winterton was expected to participate
following the draft, winterton was expected to participate in the kraken's training camp before returning to the bulldogs for the 2021–22 season. however, he suffered a shoulder injury during the bulldogs 2021 preseason camp and subsequently missed the first half of the ohl season. he was originally expected to miss a ...
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dfc48e55b83a9694d60246375745555d05a4e54c
due to covid-19 playing restrictions, the ohl did
due to covid-19 playing restrictions, the ohl did not resume play for the 2020–21 season and winterton missed his sophomore year with the bulldogs. during the play pause, winterton play in 5-on-5 and 3-on-3 scrimmages organized by his agent and various coaches. although he did not play in the ohl, winterton was selecte...
wikipedia
74ff0a8314c98c46e568216541d823efd9369320
winterton debuted with the bulldogs during the shortened
winterton debuted with the bulldogs during the shortened 2019–20 season. in his ohl debut on september 30, he scored the game-winning goal to lift the bulldogs to a 4–3 win over the sarnia sting. by mid-october, he had added one goal and one assist through nine games and was added to the team's power-play and penalty k...
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b8fc43d4d875a49d202588626d27c80fa818b803
although he was born in markham, winterton began
although he was born in markham, winterton began his ice hockey career in whitby, ontario with the whitby wildcats in the ontario minor hockey association (omha). in the 2018–19 season, winterton amassed 38 goals and 34 assists through 36 games and helped the wildcats qualify for the omha championship. during the tourn...
wikipedia
eba130eb323254ee6c4681f6da492cd261d9dd22
winterton was born on september 4, 2003, in
winterton was born on september 4, 2003, in markham, ontario, canada, to parents lesley and garth winterton. his older brother jacob also plays ice hockey and most recently played for the university of guelph.
wikipedia
3e2a7bb559817268b4b0e274dc54e406a4605a6e
ryan winterton (born september 4, 2003) is a
ryan winterton (born september 4, 2003) is a canadian professional ice hockey centre for the coachella valley firebirds of the american hockey league (ahl) as a prospect under contract to the seattle kraken of the national hockey league (nhl). he was selected sixty-seventh overall by the kraken in the 2021 nhl entry dr...
wikipedia
0c5e7438a87af6725b6ae1b7457778ea91b5b983
kraskovsky made his kontinental hockey league (khl) debut
kraskovsky made his kontinental hockey league (khl) debut playing with lokomotiv yaroslavl during the 2013–14 khl season. on june 26, 2014, kraskovsky was drafted in the 6th round of the 2014 nhl entry draft (164th overall) by the winnipeg jets of the national hockey league
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784762f7e2a4a7b81638f2d8daeb9aa685b1a5b5
pavel dmitrievich kraskovsky (russian: Павел Дмитриевич Красковский; born
pavel dmitrievich kraskovsky (russian: Павел Дмитриевич Красковский; born september 11, 1996) is a russian professional ice hockey player. he is currently playing with lokomotiv yaroslavl of the kontinental hockey league (khl).
wikipedia
cb498c09f9c8de273a94235064ccc756157fcc5f
yuen ren chao, also known as zhao yuanren,
yuen ren chao, also known as zhao yuanren, was a chinese-american linguist, educator, scholar, poet, and composer, who contributed to the modern study of chinese phonology and grammar. chao was born and raised in china, then attended university in the united states, where he earned degrees from cornell university and h...
wikipedia
c95e2e9e2120b1a8103ef0392c9b50cd2026ae39
late in his life, chao was invited by
late in his life, chao was invited by deng xiaoping to return to china in 1981. previously at the invitation of premier zhou enlai, he and his wife returned to china in 1973 for the first time since the 1940s. after his wife died in march 1981 he visited china again between may and june. he died in cambridge, massachus...
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65b1652547c0b050ce4e4da33516b7e6ff040ea2
both chao and his wife yang were known
both chao and his wife yang were known for their good senses of humor, he particularly for his love of subtle jokes and language puns: they published a family history entitled, life with chaos: the autobiography of a chinese family. their first daughter rulan chao pian (1922–2013) was professor of east asian studies an...
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5c632fa49799636ddedafa1813e7c4eeefee945d
yang buwei published how to cook and eat
yang buwei published how to cook and eat in chinese in 1946, and the book went through many editions. their daughter rulan wrote the english text and mr. chao developmentally edited the text based on mrs. chao's developed recipes, as well as her experiences gathering recipes in various areas of china. among the three o...
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d112ce630a976f3c76729ce1c2dc9dd8e4845687
in 1920, he married the physician yang buwei.
in 1920, he married the physician yang buwei. the ceremony was simple, as opposed to traditional weddings, attended only by hu shih and one other friend. hu's account of it in the newspapers made the couple a model of modern marriage for china's new culture generation.
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69a80c2c2b475cbbac4d1d4f4b1cc3ddc9d81181
chao also wrote " lion-eating poet in the
chao also wrote " lion-eating poet in the stone den ", a chinese text consisting of 92 characters, each with the syllable shi in modern standard chinese, only varying by tone. when written out using chinese characters the text can be understood, but it is incomprehensible when read out aloud in standard chinese, and th...
wikipedia
796d1ffc01db427f610c2b15f4fcdffb6f25d667
chao invented the general chinese phonetic system to
chao invented the general chinese phonetic system to represent the pronunciations of all major varieties of chinese simultaneously. it is not specifically a romanization system, but two alternate systems: one uses chinese characters phonetically as a syllabary, and the other is an alphabetic romanization system with si...
wikipedia
dfafeaa9d83c5f0fc295b947be5318268d583b17
he is the author of one of the
he is the author of one of the most important standard modern works on chinese grammar, a grammar of spoken chinese, which was translated into chinese separately by lü shuxiang in 1979 and by ting pang-hsin in 1980. it was an expansion of the grammar chapters in his earlier textbooks, mandarin primer and cantonese prim...
wikipedia
785c04c7a2e2849eb11efa5c0fd4e9974457c0e3
in 1938, he left for the us and
in 1938, he left for the us and resided there afterwards. in 1945, he served as president of the linguistic society of america, and in 1966 a special issue of the society's journal language was dedicated to him. in 1954, he became an american citizen. in the 1950s he was among the first members of the society for gener...
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9489457a848e710d1132302bef5072faacf9219d
he began to conduct linguistic fieldwork throughout china
he began to conduct linguistic fieldwork throughout china for the institute of history and philology of academia sinica from 1928 onwards. during this period of time, he collaborated with luo changpei, another leading chinese linguist of his generation, to translate bernhard karlgren 's Études sur la phonologie chinois...
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74951321f01c4734715585315e096c51ebc935db
in 1920, chao returned to china and taught
in 1920, chao returned to china and taught mathematics at tsinghua university. the next year, he returned to the united states to teach at harvard university. in 1925, he again returned to china, teaching at tsinghua, and in 1926 began a survey of the wu dialects. while at tsinghua, chao was considered one of the 'four...
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58a395099bdb6490034cb4340e4233424b931caa
already in college his interests had turned to
already in college his interests had turned to music and languages. he spoke german and french fluently and some japanese, and he had a reading knowledge of ancient greek and latin. he was bertrand russell 's interpreter during russell's visit to china in 1920. in my linguistic autobiography, chao wrote of his ability ...
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49ea3a5d5a1bb78518baa9220392b5f53d208d98
chao was born in tianjin in 1892, though
chao was born in tianjin in 1892, though his family's ancestral home was in changzhou, jiangsu. in 1910, chao went to the united states with a boxer indemnity scholarship to study mathematics and physics at cornell university, where he was a classmate and lifelong friend of hu shih (1891–1962), the leader of the new cu...
wikipedia
723b9f9850f174a434b4b11d5b3b05351a7104f5
yuen ren chao (3 november 1892 – 25
yuen ren chao (3 november 1892 – 25 february 1982), also known as zhao yuanren, was a chinese-american linguist, educator, scholar, poet, and composer, who contributed to the modern study of chinese phonology and grammar. chao was born and raised in china, then attended university in the united states, where he earned ...
wikipedia
f2e0f4ad75122b2d08b29176c9e2f75616547d79
the institute of physics of the chinese academy
the institute of physics of the chinese academy of sciences was the result of a merger, after the communist took control of the mainland china in 1949, between the institute of physics of academia sinica (iopas) founded in shanghai in 1928 and the institute of physics of national academy of peiping (iopnap) founded in ...
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f4b552366d53576a73b29e58c3e0eb4788271f69
the institute of physics of the chinese academy
under iopcas. they are the national lab for superconductivity established in 1991, the state key laboratory of magnetism opened in 1990 and the state key laboratory of surface physics founded in 1987. in addition, a series of cas key labs in the fields such as optical physics, extreme conditions physics, electron micr...
wikipedia
2d85886a17a11349af76f066a147619ee06f6df8
the iopcas established partnership with institutions and universities
the iopcas established partnership with institutions and universities of over 30 countries, such as stanford university, university of california, berkeley, the royal society of london, centre national de la recherche scientifique, max planck society, japan society for the promotion of science, among many others. by 20...
wikipedia
58dc03d0befbcc4f02d9752660932f8049711ca6
three chinese state key laboratories are now under
three chinese state key laboratories are now under iopcas. they are the national lab for superconductivity established in 1991, the state key laboratory of magnetism opened in 1990 and the state key laboratory of surface physics founded in 1987. in addition, a series of cas key labs in the fields such as optical physic...
wikipedia
080757d646b409279cfd77d64e55fb38041b5148
besides yan jici and wu ta-you, several chinese
besides yan jici and wu ta-you, several chinese prominent scientists have also worked at iopcas or one of its predecessors, wu youxun, chung-yao chao, qian sanqiang, among others.
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e77494f11d35ba042fc11bbb36c2cc9bb98b4c48
by the end of 2017, the iopcas counted
by the end of 2017, the iopcas counted 346 of scientific research, 127 of technical support, with research activities on condensed matter physics, optical physics, atomic and molecular physics, plasma physics, soft matter physics, and condensed matter theory and computation physics. 14 academicians of the chinese acade...
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340efbf80af84040fb118b7e8b133b3a39aaeb78
claiming the same root, a partnership agreement between
claiming the same root, a partnership agreement between the iopcas in mainland china and iopas in taiwan was signed by their directors during the celebration of their 80th anniversary of foundation amid a warming trend in cross-strait relations of the time. however, in 2018, the two iops celebrated their 90th anniversa...
wikipedia
79b34e1eea3dbbf457fef137e0c081266275889e
the institute of physics of the chinese academy
the institute of physics of the chinese academy of sciences (iopcas chinese: 中国科学院物理研究所) was the result of a merger, after the communist took control of the mainland china in 1949, between the institute of physics of academia sinica (iopas) founded in shanghai in 1928 and the institute of physics of national academy of...
wikipedia
1a924699e47bef120b346b32da67a6dbaad88b53
thus, the larger the optical depth, the smaller
thus, the larger the optical depth, the smaller the amount of transmitted radiant power through the material. spectral optical depth or spectral optical thickness is the natural logarithm of the ratio of incident to transmitted spectral radiant power through a material. optical depth is dimensionless, and in particular...
wikipedia
df71594289c4bfc9fcaa1d871d49ddaf0f6c26c6
in astronomy, the photosphere of a star is
in astronomy, the photosphere of a star is defined as the surface where its optical depth is 2/3. this means that each photon emitted at the photosphere suffers an average of less than one scattering before it reaches the observer. at the temperature at optical depth 2/3, the energy emitted by the star (the original de...
wikipedia
3803dbd22913b4555ae4d359e1e6281328de55be
the optical depth with respect to the height
the optical depth with respect to the height within the atmosphere is given by τ (z) = k a w 1 ρ 0 h e − z / h {\displaystyle \tau (z)=k_{\text{a}}w_{1}\rho _{0}he^{-z/h}} and it follows that the total atmospheric optical depth is given by τ (0) = k a w 1 ρ 0 h {\displaystyle \tau (0)=k_{\text{a}}w_{1}\rho _{0}h}
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87152f460032b7ba6f355721460e05196f0dc703
in atmospheric sciences, one often refers to the
in atmospheric sciences, one often refers to the optical depth of the atmosphere as corresponding to the vertical path from earth's surface to outer space; at other times the optical path is from the observer's altitude to outer space. the optical depth for a slant path is τ = mτ ′, where τ′ refers to a vertical path, ...
wikipedia
afc0ce5e6d58046d10988820b7b22b6ca5bed0d9
in atomic physics, the spectral optical depth of
in atomic physics, the spectral optical depth of a cloud of atoms can be calculated from the quantum-mechanical properties of the atoms. it is given by τ ν = d 2 n ν 2 c ℏ ε 0 σ γ {\displaystyle \tau _{\nu }={\frac {d^{2}n\nu }{2\mathrm {c} \hbar \varepsilon _{0}\sigma \gamma }}} where
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d58df303d41a9fc57d09a9f62c2f7db8c7187586
and if n {\displaystyle n} is uniform along
and if n {\displaystyle n} is uniform along the path, i.e., n (z) ≡ n {\displaystyle n(z)\equiv n}, the relation becomes: τ = σ n l {\displaystyle \tau =\sigma nl}
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d270d8313f2596a8c8b8e44cd5495c52e92ba972
sometimes the relation is given using the attenuation
sometimes the relation is given using the attenuation cross section of the material, that is its attenuation coefficient divided by its number density: τ = ∫ 0 l σ n (z) d z, {\displaystyle \tau =\int _{0}^{l}\sigma n(z)\,\mathrm {d} z,} where
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dec98fc956dbfa1932813d5f0b45b7718dedfc48
optical depth of a material is also related
optical depth of a material is also related to its attenuation coefficient by: τ = ∫ 0 l α (z) d z, {\displaystyle \tau =\int _{0}^{l}\alpha (z)\,\mathrm {d} z,} where
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67151ff397897b1ff2a2ccd4358569bacc79f4f5
and according to the beer–lambert law, t =
and according to the beer–lambert law, t = e − τ, {\displaystyle t=e^{-\tau },} so: a t t = 1 − e − τ + e ≈ τ + e ≈ τ, if τ ≪ 1 and e ≪ τ. {\displaystyle att=1-e^{-\tau }+e\approx \tau +e\approx \tau,\quad {\text{if}}\ \tau \ll 1\ {\text{and}}\ e\ll \tau.}
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bd3b83f9b4acbfe0287113a831e4a2c87bea8aba
optical depth measures the attenuation of the transmitted
optical depth measures the attenuation of the transmitted radiant power in a material. attenuation can be caused by absorption, but also reflection, scattering, and other physical processes. optical depth of a material is approximately equal to its attenuation when both the absorbance is much less than 1 and the emitta...
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e8831a231950682663fe75dfedfae9d50eba10d9
spectral absorbance is related to spectral optical depth
spectral absorbance is related to spectral optical depth by: τ ν = a ν ln 10, {\displaystyle \tau _{\nu }=a_{\nu }\ln 10,} τ λ = a λ ln 10, {\displaystyle \tau _{\lambda }=a_{\lambda }\ln 10,} where
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2879def09bf6ada10f9d87737a60e8d7c31708d5
spectral optical depth in frequency and spectral optical
spectral optical depth in frequency and spectral optical depth in wavelength of a material, denoted τ ν {\displaystyle \tau _{\nu }} and τ λ {\displaystyle \tau _{\lambda }} respectively, are given by: τ ν = ln (Φ e, ν i Φ e, ν t) = − ln t ν {\displaystyle \tau _{\nu }=\ln \!\left({\frac {\phi _{\mathrm {e},\nu }^{\mat...
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5cfde1ad6815b0872dfa45224b6c87acc293ba13
optical depth of a material, denoted τ {\textstyle
optical depth of a material, denoted τ {\textstyle \tau }, is given by: τ = ln (Φ e i Φ e t) = − ln t {\displaystyle \tau =\ln \!\left({\frac {\phi _{\mathrm {e} }^{\mathrm {i} }}{\phi _{\mathrm {e} }^{\mathrm {t} }}}\right)=-\ln t} where
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9b557a48b853b074822f69f1795441ef5e4c1a86
in chemistry, a closely related quantity called "
in chemistry, a closely related quantity called " absorbance " or "decadic absorbance" is used instead of optical depth: the common logarithm of the ratio of incident to transmitted radiant power through a material. it is the optical depth divided by log (10), because of the different logarithm bases used.
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2445504dbe261886bfd890155488fd6ae8fe4d72
in physics, optical depth or optical thickness is
in physics, optical depth or optical thickness is the natural logarithm of the ratio of incident to transmitted radiant power through a material.thus, the larger the optical depth, the smaller the amount of transmitted radiant power through the material. spectral optical depth or spectral optical thickness is the natur...
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87df23bc7b1a366295aca7d77df3a1b3488c518f
clarence weathers is a former professional american football
clarence weathers is a former professional american football wide receiver in the national football league (nfl). weathers played nine seasons for the new england patriots (1983–1984), the cleveland browns (1985–1988), the indianapolis colts (1989), the kansas city chiefs (1989), and the green bay packers (1990–1991). ...
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26e8cad483019e077e4d91eaeee7ca80a22cfc20
clarence weathers (born january 10, 1962, in greenville,
clarence weathers (born january 10, 1962, in greenville, south carolina) is a former professional american football wide receiver in the national football league (nfl). weathers played nine seasons for the new england patriots (1983–1984), the cleveland browns (1985–1988), the indianapolis colts (1989), the kansas city...
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b89425a0765b6da6c557aec3d966fc6aee66fa82
drug eluting implants encompass a wide range of
drug eluting implants encompass a wide range of bioactive implants that can be placed in or near a tissue to provide a controlled, sustained or on demand release of drug while overcoming barriers associated with traditional oral and intravenous drug administration, such as limited bioavailability, metabolism, and toxic...
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280df322bb3b2ea52b5b45ceda2b6e16014a348b
the field of drug eluting implants is expanding
the field of drug eluting implants is expanding to encompass treatment and management methods for a variety of treatments. in the future, possibilities exist to manufacture 'smart' drug eluting implants fitted with sensors that can provide feedback-controlled drug delivery in patients suffering from abnormalities such ...
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38748fb7c14c38f6352b1a3ab3f979dc183e3626
foreign bodies implanted into the body can elicit
foreign bodies implanted into the body can elicit immune responses. medically implanted drug eluting devices can induce an inflammatory response as well as being rejected by the body which can cause chronic inflammation. anti-inflammatory drugs can be administered alongside the implantation of a drug eluting device to ...
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50517349790aadebe21d435d0ec4e63aab8f4e65
there are issues that can arise with the
there are issues that can arise with the local and targeted method of drug eluting implants. one of the largest obstacles that the field of drug eluting implants faces is the mechanism of drug loading and reloading of non-biodegradable implants. the development of drugs that can travel from systemic circulation to a sp...
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c98f3a89e51f88d01231c307c14a32e4b6f25b14
the introduction of a drug eluting implant to
the introduction of a drug eluting implant to a local tissue can provide targeted and sustained dosing of drug and prevent systemic metabolism, a common obstacle seen in orally delivered medications. this can reduce dosage which can in turn reduce treatment cost. lower drug concentrations delivered via local depots can...
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drug eluting implants aim to improve efficacy of
drug eluting implants aim to improve efficacy of drug delivery by overcoming issues commonly associated with traditional systemic administration of drugs such as metabolism, toxicity, and an inability to maintain a certain concentration of drug in the circulation. to overcome these issues, patients are usually administ...
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4a7466170279f77fe36af1b74e570b721d25e7ab
normally, once drug is loaded into a delivery
normally, once drug is loaded into a delivery system, there is no non-invasive way to refill once drug levels in the system are depleted. developments in drug delivery refilling have shown potential through chemically modified drug-loaded hydrogels that, once in the body, are able to translocate to a specific local dru...
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3c4482b295affbd73d4b993098c4c5d70ea29121
the loading of a drug onto a matrix
the loading of a drug onto a matrix can be either incorporated into the drug at the time of manufacture or performed after the printing of an implant is complete. drugs integrated at the point of manufacture through blending with polymeric materials are generally able to withstand preparation conditions which can exclu...
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12eead5efd17b2b73dadfb86c9e19b5f65437fcd
metals however are susceptible to erosion and infection
metals however are susceptible to erosion and infection and lack biological activity. when metals are used as an implant as opposed to a permanent mechanical fixture, problems can arise when contacting associated bone and releasing drug to target tissues such as static stresses that can lead to bone loss at the site of...
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13faa92062fba37db2c813f66eaffaa3c057d1a1
metals such as titanium are highly biocompatible and
metals such as titanium are highly biocompatible and therefore commonly used in osteopathic medicine in the manufacturing of artificial joints. these joints are often coated in polymeric, or ceramic material embedded with drugs for prevention of infection and rejection, and to reduce inflammatory responses that are com...
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1107bab60f9cd17b5a98ecbebe839b5688a49d03
ceramic implants can be classified as bio-inert and
ceramic implants can be classified as bio-inert and include materials such as aluminum, zirconia, and certain carbon and silicon derivatives which are not biodegradable. bioactive ceramic implants are biodegradable substances that include calcium phosphates, and a variety of oxidised minerals that mimic natural bone pr...
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de0e4f9cbc8473d45b6082f26fa938e2465fcac4
in relation to biomedical implant manufacturing, the term
in relation to biomedical implant manufacturing, the term 'ceramic' can be used to encompass a wide variety of non-metallic substances that can be utilised in drug eluting implants due to their biocompatible properties such as resistance to corrosion and shear, low electrical conductance ability, and high melting tempe...
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3b01056fcd2f054cbf80cc42ccdfd310f2a13430
polymers can be used to create monolithic drug
polymers can be used to create monolithic drug delivery systems in which a drug is released in a rate-controlled polymer matrix, reservoir drug delivery systems containing a drug-filled core that releases drug in a manner dependent on the surrounding polymer, and hydrogels that can release drugs controlled by a variety...
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common degradable polymer materials used in drug eluting
common degradable polymer materials used in drug eluting implants include poly e-caprolactone (pcl), polylactic-co-glycolic acid (plga) and poly-l-lactic acid (plla), while non-degradable polymer materials include silicones commonly used in plastic surgery, urethanes and acrylates, and are more likely to be used in the...
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d43094d6541b129970a9ef5a0cb70fe6fefd2cd7
3d printing involves the production of a 3-dimensional
3d printing involves the production of a 3-dimensional object through the layering of material. there are a variety of 3d printing techniques, all of which come with their own advantages and disadvantages which should be considered when creating an individualized implant. the production of these drug eluting implants t...
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f3cfed208c8c7cd4bafba425a05575f72b5dbc4a
the structure of the implant is individualized and
the structure of the implant is individualized and designed to conform to the shape of the tissue that is being treated. the implant contains a reservoir that elutes a drug dependent on the mechanism of release. this mechanism be in the form of a matrix coating of the implant or a reservoir within the implant. designs ...
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fa70a43440e0131e2539446b8f7e124851c17072
current treatment for oncological conditions include chemotherapy, radiation
current treatment for oncological conditions include chemotherapy, radiation and surgery. drug eluting implants have shown potential in the treatment of cancer through adjuvant chemotherapy that has shown to suppress tumor formation locally, overcoming side effects associated with systemic chemotherapy treatment and re...
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b3df1a1f037a1e3507083ae1e564c98775388476
the treatment of orthopedic conditions has proved to
the treatment of orthopedic conditions has proved to be a large target area for drug eluting implants. current uses for this method drug delivery include bone and joint implants that can release drugs at the joint replacement sites to prevent infection and anti-inflammatory responses.
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f8cb1b4b69727aee6663b5ad2b641b7a6a04d6b9
common gynecological implants that elute contraceptive medication can
common gynecological implants that elute contraceptive medication can be inserted subcutaneously or into the uterus. non-invasive drug eluting ring implants that can be inserted into the vagina and release therapeutic doses of contraceptive, anti-inflammatory and antibiotic drugs to increase compliance of contraceptive...
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