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georgios boustras is a professor of risk assessment
georgios boustras is a professor of risk assessment at european university cyprus and editor-in-chief of safety science, a scientific journal published by elsevier. he is the director of the centre of excellence in risk & decision sciences (cerides) at european university cyprus. he is a member of the european union mi...
wikipedia
07a8eaa948544fd4de4540599badc7d32f41bf77
boustras worked as an external agent for the
boustras worked as an external agent for the world bank to modernize licensing services of the hellenic fire service. he was appointed by the president of the republic of cyprus, nicos anastasiades as vice president of cyprus's energy strategy council. he has advocated for the need for radical changes in civil protecti...
wikipedia
0fdaeb6ba5c8f9bc7e898f978a251a9654190055
george boustras received a bachelor's degree in chemical
george boustras received a bachelor's degree in chemical engineering and a master of science (msc) degree in energy resources management from london south bank university in 1995 and 1997, respectively. he received the doctor of philosophy (phd) degree in probabilistic fire risk assessment from kingston university lond...
wikipedia
6de594de08d1d81bf15e335f1df6ef44d18cc2e2
georgios boustras (greek: Γεώργιος Μπούστρας; born may 1973)
georgios boustras (greek: Γεώργιος Μπούστρας; born may 1973) is a professor of risk assessment at european university cyprus and editor-in-chief of safety science, a scientific journal published by elsevier. he is the director of the centre of excellence in risk & decision sciences (cerides) at european university cypr...
wikipedia
2c4d6fe4744779d6a31c4484eb1c1545d8de2113
the gifford covered bridge, also called the c.k.
the gifford covered bridge, also called the c.k. smith covered bridge, is a wooden covered bridge that crosses the second branch of the white river in randolph, vermont on hyde road. it was listed on the national register of historic places in 1974. it is one of two bridges in the state that was uncovered when first bu...
wikipedia
078cdd4e32576a55cf60cc352b83013d3ea3914e
circa 1955 the bridge deck was reinforced with
circa 1955 the bridge deck was reinforced with steel i -beams above the roadway which are in turn tied to i -beams below, a relatively unusual way of strengthening a covered bridge. in 2001, extensive repairs were made to the bridge, including raising it up from the river to help prevent flood waters from reaching the ...
wikipedia
671fc250ed2c8b70f799cdfe72f0a381ca5748d6
the bridge's construction date and builder are not
the bridge's construction date and builder are not known. it is one of only two covered bridges in vermont (the other being the nearby braley covered bridge) in which the king-post truss reaches only half the height of the bridge. the reason for this is that the bridge was most likely built uncovered, its trusses cover...
wikipedia
7fb37b89f7cfbd70c4f7ed1d6cd0804100754695
the gifford covered bridge is located in a
the gifford covered bridge is located in a rural setting on the far east side of randolph. it is a short way east of vermont route 14, carrying hyde road across the second branch white river. it is a single-span king post truss structure, 51.5 feet (15.7 m) long, with a roadway width of 14.5 feet (4.4 m) (one lane) and...
wikipedia
2c4d6fe4744779d6a31c4484eb1c1545d8de2113
the gifford covered bridge, also called the c.k.
the gifford covered bridge, also called the c.k. smith covered bridge, is a wooden covered bridge that crosses the second branch of the white river in randolph, vermont on hyde road. it was listed on the national register of historic places in 1974. it is one of two bridges in the state that was uncovered when first bu...
wikipedia
c930c2fd2330128b2eb1e4921a4eee546d334efd
gábor j. székely is a hungarian-american statistician/mathematician best
gábor j. székely is a hungarian-american statistician/mathematician best known for introducing energy statistics (e-statistics). examples include: the distance correlation, which is a bona fide dependence measure, equals zero exactly when the variables are independent; the distance skewness, which equals zero exactly w...
wikipedia
fd0bff5f0927c9d465224227949852b6acfe4314
in 1989 székely was visiting professor at yale
in 1989 székely was visiting professor at yale university, and in 1990-91 he was the first lukacs distinguished professor in ohio. since 1995 he has been teaching at the bowling green state university at the department of mathematics and statistics. székely was academic advisor of morgan stanley, ny, and bunge, chicago...
wikipedia
dfe69719b919cbb3b191bc47fac33a26c684fc6d
between 1985 and 1995 székely was the first
between 1985 and 1995 székely was the first program manager of the budapest semesters in mathematics. between 1990 and 1997 he was the founding chair of the department of stochastics of the budapest institute of technology (technical university of budapest) and editor-in-chief of matematikai lapok, the official journal...
wikipedia
7cb5403e55ca2e85f54b8326ae112533158ecf6e
székely attended the eötvös loránd university, hungary graduating
székely attended the eötvös loránd university, hungary graduating in 1970. his first advisor was alfréd rényi. székely received his ph.d. in 1971 from eötvös loránd university, the candidate degree in 1976 under the direction of paul erdős and andrey kolmogorov, and the doctor of science degree from the hungarian acade...
wikipedia
9e25dad6cd7d94cdd224f8b36c4365e8121c85ba
other important discoveries include the hungarian semigroups, the
other important discoveries include the hungarian semigroups, the location testing for gaussian scale mixture distributions, the uncertainty principle of game theory, the half-coin which involves negative probability, and the solution of an old open problem of lottery mathematics: in a 5-from-90 lotto the minimum numbe...
wikipedia
1ee9293348be784cf19fadb1acc9c89bb20a23cd
gábor j. székely (hungarian pronunciation:; born february 4,
gábor j. székely (hungarian pronunciation:; born february 4, 1947, in budapest) is a hungarian - american statistician / mathematician best known for introducing energy statistics (e-statistics). examples include: the distance correlation, which is a bona fide dependence measure, equals zero exactly when the variables ...
wikipedia
c1f86bb2cd6c5a2e363951d308041318c0c1e039
a charge amplifier is an electronic current integrator
a charge amplifier is an electronic current integrator that produces a voltage output proportional to the integrated value of the input current, or the total charge injected. the amplifier offsets the input current using a feedback reference capacitor, and produces an output voltage inversely proportional to the value ...
wikipedia
6dde2bf3a5a3d39285deab7573002c76b83838d1
further applications are in the readout circuitry of
further applications are in the readout circuitry of ccd imagers and flat-panel x-ray detector arrays. the amplifier is able to convert the very small charge stored within an in-pixel capacitor to a voltage level that can be easily processed. some guitar pickup amplifiers also use charge amplifiers.
wikipedia
185235a7e95718b7d1d5ed7666b5eab5c1152707
charge amplifiers are also used extensively in instruments
charge amplifiers are also used extensively in instruments measuring ionizing radiation, such as the proportional counter or the scintillation counter, where the energy of each pulse of detected radiation due to an ionising event must be measured. integrating the charge pulses from the detector gives a translation of i...
wikipedia
702eb2146e82d4f006d8e70614390db8d031ed29
the charge signals at the input of a
the charge signals at the input of a charge amplifier can be as low as some fc (femtocoulomb = 10 c). a parasitic effect of common coaxial sensor cables is a charge shift when the cable is bent. even slight cable motion may produce considerable charge signals which cannot be distinguished from the sensor signal. specia...
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e40b7bd0b4fa36ba5943b45c570b222d7178510b
due to the described dc effects and the
due to the described dc effects and the finite isolation resistances in practical charge amplifiers the circuit is not suitable for the measurement of static charges. high quality charge amplifiers allow, however, quasistatic measurements at frequencies below 0.1 hz. some manufacturers also use a reset switch instead o...
wikipedia
dea3b1f8b222c0cad1246887467eaa5c09daca17
the feedback resistor r discharges the capacitor. without
the feedback resistor r discharges the capacitor. without r the dc gain would be very high so that even the tiny dc input offset current of the operational amplifier would appear highly amplified at the output. r and c set the lower frequency limit of the charge amplifier.
wikipedia
3ce4234563c1eec1c5aeea65d871c7fed1fc2404
the amplifier offsets the input current using a
the amplifier offsets the input current using a feedback reference capacitor, and produces an output voltage inversely proportional to the value of the reference capacitor but proportional to the total input charge flowing during the specified time period.the circuit therefore acts as a charge-to-voltage converter. the...
wikipedia
18a826c80dcd248647cdbed5df5bc9a56d266bd3
in biomolecular structure, cing stands for the common
in biomolecular structure, cing stands for the common interface for nmr structure generation and is known for structure and nmr data validation. nmr spectroscopy provides diverse data on the solution structure of biomolecules. cing combines many external programs and internalized algorithms to direct an author of a new...
wikipedia
e7f6fe15973ff17cf9a75f7122d41f5e18cde1b3
nmr spectroscopy provides diverse data on the solution
nmr spectroscopy provides diverse data on the solution structure of biomolecules. cing combines many external programs and internalized algorithms to direct an author of a new structure or a biochemist interested in an existing structure to regions of the molecule that might be problematic in relation to the experiment...
wikipedia
6d3322160aed6d3de0d1f8742535d285ac49aa6d
the covid-19 pandemic in selangor, malaysia, started when
the covid-19 pandemic in selangor, malaysia, started when four of eight chinese nationals from wuhan was quarantined in a hotel of johor's iskandar puteri was tested positive on 25 january and 28 january 2020, respectively, and was quarantined in sungai buloh hospital, largest hospital of selangor. as of 24 october, se...
wikipedia
a18b360ec1dddd20af3cca814deccd7e3f002931
on 1 february, selangor's "state investment, industry and
on 1 february, selangor's "state investment, industry and commerce, and small and medium entreprises" (smes) chairman teng chang khim has announced that the state's chinese new year celebration will be held online via social media due to the ongoing covid-19 pandemic.
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1cff37f7cac55296723b3a082f9b0be4e039fa8c
on 1 august, bukit tiram cluster, which involved
on 1 august, bukit tiram cluster, which involved a religious center in johor bahru, johor, had spread to selangor. the one patient in selangor was a person who stayed in the center from 16 to 19 july, and was confirmed positive on 1 august.
wikipedia
5d68d1b06e02b5984be0afe57adc5afc650be10b
sabak bernam, a district mainly of rural areas,
sabak bernam, a district mainly of rural areas, had cleared all of the active cases and became the first district of selangor to get rid of all active cases. later, hulu langat, the former worst affected district of malaysia, had cleared all of their active cases. kuala selangor and kuala langat also had got rid all of...
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bf9c825d4788e6ba5cf04d46ab5a78592f735a7f
on 10 june, 24th death of selangor were
on 10 june, 24th death of selangor were recorded. the deceased was a 61-year-old malaysian man. he died after almost three months of treatment in sungai buloh hospital, and he had attended tablighi jamaat event in masjid sri petaling in kuala lumpur on late-february. he was the latest tabligh-related death in malaysia.
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c65d670c42cafe4a80898e467dcbb3abccd930fc
on 25 may, malaysia reports 172 new cases
on 25 may, malaysia reports 172 new cases nationwide, highest since 11 april. most of the cases concentrated in bukit jalil immigration detention depot of kuala lumpur, and immigration detention depot in selangor had also seen dramatic rise in cases. the next day, malaysia reports 187 new positive cases, and selangor's...
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58edf7c97c5232bc44a90d5733c71ea65a41002c
on 22 may, selangor records 20 new cases
on 22 may, selangor records 20 new cases and 1 death, after weeks of stabilized condition. the new deceased was a 65-year-old malaysian man who have diabetes, hypertension and kidney disease and was treated in sungai buloh hospital.
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94a6e03e46ffad405818942fbca11bc78a70f6ce
on 5 may, a 47-year-old malaysian man was
on 5 may, a 47-year-old malaysian man was the new fatality. he was admitted into a private hospital earlier on 15 march and was transferred to intensive care unit (icu) of sungai buloh hospital after being tested positive. he spent 46 days in icu. he developed thrombosis on 5 may and died at the same day.
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9be6364d9eecc3ed86357e2c096dc7aa77c61e46
on 2 may, selangor reported 63 new cases,
on 2 may, selangor reported 63 new cases, highest since early-april. total new cases of malaysia had also risen back to 3-digit number of 105. a day later, an 82-year-old malaysian man with hypertension and heart disease died in sungai buloh hospital.
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7638bd9c536d05df163303199817729bed1b09b0
malaysia records its 100th death on 28 april.
malaysia records its 100th death on 28 april. the 100th fatality was a 67-year-old malaysian man from selangor. he has diabetes, hypertension, heart disease and stroke. he was treated in sungai buloh hospital.
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8f0716b396e3ca18b6fcc69bfde889ca59762810
on 24 april, a 61-year-old malaysian man died
on 24 april, a 61-year-old malaysian man died from covid-19. he has diabetes, hypertension and kidney disease. he was a close contact of case 1345 who returned from indonesia. this patient was treated in sungai buloh hospital.
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f67003af885c38a846f0edca3be3717eedd540b8
on 21 april, one more person of selangor
on 21 april, one more person of selangor died from covid-19. the deceased is a 72-year-old malaysian woman. she is the mother of case 1053 and has diabetes and hypertension. she was treated in sungai buloh hospital.
wikipedia
7c5030356668381dfd4aa3372fc9fe86869ccddd
on 18 april, selangor reports its 1st foreigner
on 18 april, selangor reports its 1st foreigner death from covid-19. the patient was a burmese male national who was 36-year-old. he had severe acute respiratory infection (sari) and was already late-stage while going to hospital, and he died at the same day in selayang hospital, selayang, gombak district. he was part ...
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458de988b1c81d9b6e3c9f063332f6f191ba83c5
another patient had died from covid-19 in selangor
another patient had died from covid-19 in selangor on 17 april. the deceased was a close contact of case 2321. he was treated in university malaya medical centre and has hypertension and disease history of stroke. the new cases in selangor had also dropped back to single digit since mid-march, with only 9 new positive ...
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b9504591db8888db2879f8ee11e6d069f92a3c70
one more patient died from covid-19 on 15
one more patient died from covid-19 on 15 april, a 69-year-old malaysian man with diabetes and hypertension. he was treated in university malaya medical centre. after a month of daily cases staying above 100, malaysia's nationwide new cases had finally dropped to double-digit of 85 on 15 april. total cumulative cases o...
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6366de010f687872c5fa9354a1af2bc583a6cd32
the next day, 11 april, another fatality was
the next day, 11 april, another fatality was recorded. the deceased was a 71-year-old malaysian man who has diabetes, hypertension and heart disease. his case number was #537 and was treated in sungai buloh hospital. he has been staying in hospital for almost a month.
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23f8b73175d6b40adffceeb757baff16c9d1f33e
on 10 april, 1 more death was recorded.
on 10 april, 1 more death was recorded. the victim was case 4230, which is a close contact of case 1684. the deceased was an 88-year-old malaysian female national who is also a dementia patient, and has hypertension and heart disease. she was treated in university malaya medical centre.
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65c3e0d3120a6af70fb8bd4d2e933d48eb0d2292
on 6 april, ministry of health identified 2
on 6 april, ministry of health identified 2 new clusters; one of them is in selangor. the 2 new clusters were good news fellowship conference which was held in kuching, sarawak in late-february, and a wedding ceremony in bandar baru bangi. the wedding ceremony was one of the largest clusters originated in selangor. bot...
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ed0cc85c444d0d2eb81adf31a077ae21c7dca254
on 3 april, one more death were recorded,
on 3 april, one more death were recorded, an 84-year-old malaysian female national. she has heart disease. she was first treated in sungai buloh hospital, but then got transferred to institut jantung negara, or national heart institute. she died on 2 april.
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da7270ab87b4c6f1ba756c07a868c7b8436acf50
on 31 march, two more fatalities were recorded:
on 31 march, two more fatalities were recorded: case 2628 and 2629. case 2628 was a malaysian 81-year-old national who has heart disease. he died in medical centre of university malaya on the morning of 31 march. case 2629 was a malaysian 73-year-old male national, who has diabetes and heart disease. he died in tengku ...
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09673d0766df6f620ab3b16b4429875c93e48e60
hulu langat district had also become the leading
hulu langat district had also become the leading red zone of selangor on 30 march, with 258 total cases, compared to 224 cases in petaling. hulu langat had also become the leading red zone of entire malaysia.
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b31dcc14ae38e4f8bd44fdb98dfb8086a73f6e5d
on march 30, no fatalities of selangor residents
on march 30, no fatalities of selangor residents were recorded, but a worker of human resources department of moh from putrajaya, the administrative center of malaysia, had died in sungai buloh hospital. the victim from putrajaya was a malaysian 57-year-old female national. she had travel history to indonesia, and was ...
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30a5af92d105918e1df5285f06b0129fbf689623
on march 28, two more fatalities were recorded;
on march 28, two more fatalities were recorded; case 2321 and case 2322. case 2321 was a 91-year-old malaysian female national while case 2322 was a 76-year-old malaysian male national. both of them were treated at university malaya medical centre and has diabetes, hypertension and kidney disease.
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40d6d196512d4a66f09fb2408bf5fb56e6709b90
on 27 march, a new fatality was recorded;
on 27 march, a new fatality was recorded; a 53-year-old man. he died in sungai buloh hospital. at the same day, a 62-year-old man was found dead in the toilet of serdang hospital, kajang. he was believed to had committed suicide. he was found dead by a nurse at 7:40 pm. he is a patient under investigation (pui) and had...
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41623f12a05430b043673eb57bb1600e7835a8d2
on 26 march, selangor records 75 new positive
on 26 march, selangor records 75 new positive cases, the highest record. malaysia also records 235 new cases nationwide, which is the highest until 4 june. on the same day, klang became the fourth red zone of selangor.
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17776ab6d7c34b5810193f19e03e36d97e0f0be4
as of 24 march, 3 district of selangor
as of 24 march, 3 district of selangor has been classified as red zone (district with 40+ cases): gombak, hulu langat and petaling. petaling district, where sungai buloh, petaling jaya and shah alam were located, was the 2nd leading red zone with 158 registered cases as of 24 march, behind lembah pantai of kuala lumpur...
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3a8ef5a511bd471650f7fe5ecb01bc072f481866
on 23 march 2020, selangor recorded its first
on 23 march 2020, selangor recorded its first fatality. the victim was a 70-year-old mosque leader from cheras. he had heart disease and hypertension, and he died in canselor tuanku muhriz ukm hospital near ampang, hulu langat district. he travelled to indonesia on february. this is the 11th fatality of malaysia.
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4cf178920cda0d4539b177682032305bdef1aec4
on 18 march, movement control order had officially
on 18 march, movement control order had officially gone effective. all shops will be closed except for essential services; major gatherings is banned, schools will be closed, etc. at the same day, a newly married couple was tested positive for covid-19. they held a wedding ceremony on 6–7 march in bandar baru bangi of ...
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93eb10a4ab73f74505f28a5425dcfb07a41ab7cd
on 17 march, malaysia reported its first two
on 17 march, malaysia reported its first two fatalities: a 60-year-old pastor from good news fellowship conference, kuching, sarawak, who was identified as david cheng, and a 34-year-old man from johor bahru, johor, who attended tabligh jamaat event in kuala lumpur. both of them were malaysian male national. selangor h...
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ac54caa4a0f28d223343e77467a0d0cc46e797ee
on 16 march, prime minister muhyiddin yassin held
on 16 march, prime minister muhyiddin yassin held a nationwide live telecast at night, to announce the implementation of movement control order (mco). it will be gone effective on 18 march 2020 and expected to end on 31 march 2020. total cumulative cases of selangor had also breached 100, as the total reached 144.
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993f578c2cc0a468d882ed0d8fd27022c5c272b2
on mid-march, main cluster of malaysia has slowly
on mid-march, main cluster of malaysia has slowly turned from case 26 & 33 to tabligh jamaat. brunei, indonesia, cambodia, philippines and other southeast asian nations had reported multiple confirmed cases from tabligh jamaat event. on 13 march, malaysia released state-by-state data. selangor had confirmed 87 total cu...
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7f3405c752a05f3cb81931848ee70f8eeff0def4
on 9 march 2020, total cases of malaysia
on 9 march 2020, total cases of malaysia breach 100, most of the cases in early-march were linked to case 26 & 33. however, both mr. hamdan (case 26) and mr. dahlan (case 33) has recovered and discharged, but date is undisclosed.
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7768ad0df9daa84d2a077d0cdb376c3348502927
on 3 march 2020, malaysia reports multiple of
on 3 march 2020, malaysia reports multiple of cases in selangor, mainly linked to case 26. one more key case in case 26 was identified at the same day: case 33. case 33 was a senior lawyer and member of uda holdings berhad, rosli dahlan. he had meeting with 14 other person on 24 february with mr. hisham hamdan.
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dacbfc0d742c9c863689cbaa8ede9302a744892c
on 1 march 2020, hisham hamdan, who is
on 1 march 2020, hisham hamdan, who is the executive director of khazanah nasional and chairman of uda holdings berhad, was tested positive for covid-19. he travelled to shanghai, china on mid-january. he had meetings with 18 others on 21 february, 15 on 24 february, and 21 others on 27 february. he developed symptoms ...
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9cb3264d27b4a3684fd7ea79e8276a26bf7c890a
on 27 february 2020, a tablighi jamaat event
on 27 february 2020, a tablighi jamaat event was held in a mosque of sri petaling, kuala lumpur. it was attended by 15,000 people, including 14,500 malaysian citizens and 1,500 foreigners. this event was attended by multiple malaysians returning from south korea.
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51dcc8515bad755943de27a4bb96a1916ff6ba6b
at the next day, selangor was no-longer covid
at the next day, selangor was no-longer covid free as 1 more case was recorded. the new patient was a 54-year-old man from italy who is married to a malaysian woman. he went back to italy on 15–21 february for business reasons. he was diagnosed on 28 february and was treated in sungai buloh hospital.
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45ff2da6297eb24172b0855fdd294738ef2f316d
on 17 february, case 9, or 5th case
on 17 february, case 9, or 5th case of selangor, has recovered and discharged, making him he first malaysian citizen to recover from covid-19. on 19 february, two more patients were discharged: case 17 and 18.
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6312fa1509bcf217edbe55c96deac5a3d034e541
the next day, 1 more positive case was
the next day, 1 more positive case was recorded: an 83-year old american woman. she was a passenger of ms westerdam, which was docked in sihanoukville port of cambodia. after passing the medical examination in cambodia on 13 february, she was allowed to return to us by cambodian authorities. but since cambodia don't ha...
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120b18ca3d1fe9afa5c4343020254a1d69d8a826
on 9 february, selangor recorded another new case:
on 9 february, selangor recorded another new case: a 31-year-old man from hulu langat district who works in macau and been to mainland china on 1 february. he developed cough on 7 february and was admitted into sungai buloh hospital. he was later diagnosed on 9 february.
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598505cd12427b7731ec7d50139c3c53a1bd4c84
on 8 february, selangor records 1 more new
on 8 february, selangor records 1 more new case, which is linked to case 9. the patient was a 65-year old malaysian woman, who ate with case 9 at the same table during the chinese new year. she began to feel uncomfortable on 5 february, where she had dizziness and night sweats but without fever. she was diagnosed on 8 ...
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cc1f3d09ed54388741bda35292d53266b2da3c0b
on 29 january 2020, a 41-year-old malaysian male,
on 29 january 2020, a 41-year-old malaysian male, who attended an international conference in grand hyatt singapore on 17–23 january and celebrated chinese new year with his family, went to a private medical institution in selangor after having fever and cough. he was admitted to sungai buloh hospital on 2 february, an...
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6309b6b6d48fdf736e1c3ec8012e5a0d7a6322ad
3 days later, a 36-year-old woman, who is
3 days later, a 36-year-old woman, who is daughter-in-law of first case of singapore. and mother of case 2 and 3, was also tested positive. she was also warded in sungai buloh hospital. she had negative results earlier but she went to sungai buloh hospital to take care of her two infected child, where she got tested po...
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d0c47f41e59a79e0f5def6da633f35eadcb3682e
on 24 january, eight chinese nationals from wuhan
on 24 january, eight chinese nationals from wuhan of hubei province entered johor via tuas checkpoint of neighbouring singapore. they were quarantined in the forest city of iskandar puteri and was tested negative earlier, but on 25 january, 3 of them was tested positive, marking the beginning of covid-19 outbreak in ma...
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a13d41eba7be6c17b7c41d9811e37ed1bc5bf16c
the covid-19 pandemic in selangor, malaysia, started when
the covid-19 pandemic in selangor, malaysia, started when four of eight chinese nationals from wuhan was quarantined in a hotel of johor 's iskandar puteri was tested positive on 25 january and 28 january 2020, respectively, and was quarantined in sungai buloh hospital, largest hospital of selangor. as of 24 october, s...
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1c24f12f5840f1110432b96a50111c2523ce3fe2
calcium aluminoferrite (ca22o5) is a dark brown crystalline
calcium aluminoferrite (ca22o5) is a dark brown crystalline phase commonly found in cements. in the cement industry it is termed tetra-calcium aluminoferrite or ferrite. in cement chemist notation (ccn), it is abbreviated as c4af meaning 4cao·al2o3·fe2o3 in the oxide notation. it also exists in nature as the rare miner...
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calcium aluminoferrite (c af) has little effect upon
calcium aluminoferrite (c af) has little effect upon the physical properties of cement. on hydration it forms hydrogarnet (4 cao· al o · n h o) and hydrated iron oxide gel. in principle, this is a fast and energetic exothermic reaction, but precipitation of an insoluble layer of hydrated iron oxide upon the calcium alu...
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the typical chemical composition of calcium aluminoferrite (c
the typical chemical composition of calcium aluminoferrite (c af) for three different clinker bulk fe o contents is given in the next table. the calcium aluminoferrite mean composition is clearly dominated by cao (43.7 wt. %), al o (19.3 wt %), and fe o (25.4 wt. %). the mean contents in sio (4.2 wt. %) and other oxide...
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in portland cement clinker, calcium aluminoferrite (c af)
in portland cement clinker, calcium aluminoferrite (c af) occurs as an "interstitial phase", crystallizing from the melt as the reaction end-product of the flux components (al o and fe o) added in the raw materials to lower the high melting point of the oxide mix cao- sio. its presence in clinker is solely due to the n...
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in the absence of elements other than calcium,
in the absence of elements other than calcium, aluminium, iron and oxygen, calcium aluminoferrite forms a solid solution series of formula ca (al fe) o for all values of x in the range 0–0.7. compositions with x > 0.7 do not exist at ordinary pressures (see dicalcium aluminate). the crystal is orthorhombic, and is norm...
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d9bef89718d1be4a36e33006574137cf3cd335b2
calcium aluminoferrite (ca (al,fe) o) is a dark
calcium aluminoferrite (ca (al,fe) o) is a dark brown crystalline phase commonly found in cements. in the cement industry it is termed tetra-calcium aluminoferrite or ferrite. in cement chemist notation (ccn), it is abbreviated as c af meaning 4cao· al o · fe o in the oxide notation. it also exists in nature as the rar...
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eb5d7a179c83f7ae117149b81f3f129059a20551
henry david schlinger jr. is an american psychologist
henry david schlinger jr. is an american psychologist known for his work in applied behavior analysis. he is a professor of psychology at california state university, los angeles, where he was formerly the director of the m.s. program in applied behavior analysis. he also holds a part-time position as an associate prof...
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henry david schlinger jr. is an american psychologist
henry david schlinger jr. is an american psychologist known for his work in applied behavior analysis. he is a professor of psychology at california state university, los angeles, where he was formerly the director of the m.s. program in applied behavior analysis. he also holds a part-time position as an associate prof...
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265e963569554703411ca072e5a284b858ee92a5
henri heim de balsac was a french zoologist.
henri heim de balsac was a french zoologist. in 1937 henri heim de balsac was awarded the prix savigny de l'académie des sciences. in the following year, 1938, he was awarded the prix gadeau de kerville de la société zoologique de france and he became a council member of the société zoologique de france in february, 19...
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dc4e74775d3c2687637358f6e132b0f708abde34
he was, from 1929, on the editorial committee
he was, from 1929, on the editorial committee of alauda, revue internationale d'ornithologie fr:alauda, revue internationale d'ornithologie with its founder paul paris and louis lavauden, noël mayaud, jacques de chavigny, henri jouard, jacques delamain and paul poty.
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in 1937 henri heim de balsac was awarded
in 1937 henri heim de balsac was awarded the prix savigny de l'académie des sciences. in the following year, 1938, he was awarded the prix gadeau de kerville de la société zoologique de france and he became a council member of the société zoologique de france in february, 1938. he became a corresponding member of the h...
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cdb8925f0d21ec769aa633db8eb4b489fd2dd20d
the bo'ai road area is a historical neighbourhood
the bo'ai road area is a historical neighbourhood in haikou city, hainan, china. it is located on the south side of the haidian river, at the northern part of mainland haikou. the main hub of the neighbourhood is the north-south bo'ai road itself, a commercial road with shops selling such items as fabrics, wholesale to...
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8f8d6f5c93283d2ac893db11d66cdfa75b3f0992
as of june 2015, most of the old
as of june 2015, most of the old shops, many of which were hardware stores, have been replaced with businesses to attract tourists. these include juice bars and coffee shops. several of these businesses have set up chairs, tables and patio umbrellas on the street. these are all higher quality, made of wood and canvass ...
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also known as the qilou arcade streets and
also known as the qilou arcade streets and qilou old street, and formerly known as huanhaifang road, a government project to restore parts of this street began around 2012. restoration of all 39 buildings on zhongshan road was completed in early 2013. the road was entirely repaved with cobblestones, large potted plants...
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since around 2010, a small number of the
since around 2010, a small number of the buildings have been demolished, either for development, or because they were unsafe. beginning around 2012, parts of the area have been restored, with the building facades overhauled and road surfaces in severe disrepair being replaced with cobblestones. as of june 2015, the ent...
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8c741e4d1bf964e2f122f3ed7fa2758a9d54e1cd
much of the area comprises tong lau -style,
much of the area comprises tong lau -style, buildings with european fusion-type architectural facades with indian and arabic influences. the buildings are almost all painted white, and are usually no more than a few storeys tall. many were dilapidated. however, much of the area has now been restored. the streets are mo...
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691d15a2eee87512d5627f4be8ca37c1518d05f5
the bo'ai road area (chinese: 博爱路小区; pinyin: bó'ài
the bo'ai road area (chinese: 博爱路小区; pinyin: bó'ài lù xiǎoqū) is a historical neighbourhood in haikou city, hainan, china. it is located on the south side of the haidian river, at the northern part of mainland haikou. the main hub of the neighbourhood is the north-south bo'ai road itself, a commercial road with shops s...
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1aff44a4a653a5589ff9613d8f9dbb1df5bde340
in mathematics, specifically in symplectic topology and algebraic
in mathematics, specifically in symplectic topology and algebraic geometry, gromov–witten (gw) invariants are rational numbers that, in certain situations, count pseudoholomorphic curves meeting prescribed conditions in a given symplectic manifold. the gw invariants may be packaged as a homology or cohomology class in ...
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8670003973d61b762aa12c013674909488348cee
the situation improves in the variation known as
the situation improves in the variation known as closed a-model. here there are six spacetime dimensions, which constitute a symplectic manifold, and it turns out that the worldsheets are necessarily parametrized by pseudoholomorphic curves, whose moduli spaces are only finite-dimensional. gw invariants, as integrals o...
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81ecb55256407f2f35d6da892b289b6fa299ddfd
gw invariants are of interest in string theory,
gw invariants are of interest in string theory, a branch of physics that attempts to unify general relativity and quantum mechanics. in this theory, everything in the universe, beginning with the elementary particles, is made of tiny strings. as a string travels through spacetime it traces out a surface, called the wor...
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aefb7439e39c0c91b46616a0c725a65911d5c6c0
the gromov-witten invariants of smooth projective varieties can
the gromov-witten invariants of smooth projective varieties can be defined entirely within algebraic geometry. the classical enumerative geometry of plane curves and of rational curves in homogeneous spaces are both captured by gw invariants. however, the major advantage that gw invariants have over the classical enume...
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703ff4e9fa594867fb5630d22acb3756acc06a97
the gw invariants are closely related to a
the gw invariants are closely related to a number of other concepts in geometry, including the donaldson invariants and seiberg–witten invariants in the symplectic category, and donaldson–thomas theory in the algebraic category. for compact symplectic four-manifolds, clifford taubes showed that a variant of the gw inva...
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2f2a25452962782f935844207c1deb3db6034702
another approach is to employ symplectic surgeries to
another approach is to employ symplectic surgeries to relate x to one or more other spaces whose gw invariants are more easily computed. of course, one must first understand how the invariants behave under the surgeries. for such applications one often uses the more elaborate relative gw invariants, which count curves ...
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c5155bf5cf66c725e522d483ee295621121d5451
the main computational technique is localization. this applies
the main computational technique is localization. this applies when x is toric, meaning that it is acted upon by a complex torus, or at least locally toric. then one can use the atiyah–bott fixed-point theorem, of michael atiyah and raoul bott, to reduce, or localize, the computation of a gw invariant to an integration...
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bf050222cc3f925fca29975e879477d3b7063ce1
however, a special j may induce a nonsurjective
however, a special j may induce a nonsurjective d and thus a moduli space of pseudoholomorphic curves that is larger than expected. loosely speaking, one corrects for this effect by forming from the cokernel of d a vector bundle, called the obstruction bundle, and then realizing the gw invariant as the integral of the ...
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4f9251fabf321c2c5f28351fd35a445f80d08765
gromov–witten invariants are generally difficult to compute. while
gromov–witten invariants are generally difficult to compute. while they are defined for any generic almost complex structure j, for which the linearization d of the ∂ ¯ j, j {\displaystyle {\bar {\partial }}_{j,j}} operator is surjective, they must actually be computed with respect to a specific, chosen j. it is most c...
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09b08081c412b2fbc6d5fa126155a338c4490c5f
put simply, a gw invariant counts how many
put simply, a gw invariant counts how many curves there are that intersect n chosen submanifolds of x. however, due to the "virtual" nature of the count, it need not be a natural number, as one might expect a count to be. for the space of stable maps is an orbifold, whose points of isotropy can contribute noninteger va...
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ef0f2ea3121c7b4a1a30f632b4b93df6a7cfefc1
where ⋅ {\displaystyle \cdot } denotes the intersection
where ⋅ {\displaystyle \cdot } denotes the intersection product in the rational homology of y. this is a rational number, the gromov–witten invariant for the given classes. this number gives a "virtual" count of the number of pseudoholomorphic curves (in the class a, of genus g, with domain in the β-part of the deligne...
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46e24224dd80f868c2b60438a824b99a809977b7
to interpret the gromov–witten invariant geometrically, let β
to interpret the gromov–witten invariant geometrically, let β be a homology class in m ¯ g, n {\displaystyle {\overline {\mathcal {m}}}_{g,n}} and α 1, …, α n {\displaystyle \alpha _{1},\ldots,\alpha _{n}} homology classes in x, such that the sum of the codimensions of β, α 1, …, α n {\displaystyle \beta,\alpha _{1},\l...
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447ac7f219552b9b677d3ea6f4943bbc211b7a07
the evaluation map sends the fundamental class of
the evaluation map sends the fundamental class of m ¯ g, n (x, a) {\displaystyle {\overline {\mathcal {m}}}_{g,n}(x,a)} to a d -dimensional rational homology class in y, denoted
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66969b01cdc8e5c0e9ce6cd0d1489fcef5cd7ba0
now we define the gromov–witten invariants associated to
now we define the gromov–witten invariants associated to the 4-tuple: (x, a, g, n). let m ¯ g, n {\displaystyle {\overline {\mathcal {m}}}_{g,n}} be the deligne–mumford moduli space of curves of genus g with n marked points and m ¯ g, n (x, a) {\displaystyle {\overline {\mathcal {m}}}_{g,n}(x,a)} denote the moduli spac...
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79767237846501c104ca04755a9b2dea137604f4
the rigorous mathematical definition of gromov–witten invariants is
the rigorous mathematical definition of gromov–witten invariants is lengthy and difficult, so it is treated separately in the stable map article. this article attempts a more intuitive explanation of what the invariants mean, how they are computed, and why they are important.
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