2,618 research outputs found
Redescription of Troticus ovalis (Fahringer) comb. nov., its first host record and a note on T. melamopterus Cameron (Hymenoptera: Braconidae: Agathidinae)
No full textDisophrys ovalis Fahringer, 1937 (Hymenoptera: Braconidae: Agathidinae) from Egypt is redescribed and transferred to the genus Troticus Brullé, 1846 (comb. nov.) with Disophrys aegyptiaca Fahringer, 1937, as its junior synonym (syn. nov.). For the first time a reliable host record for the genus and for T. ovalis is given. The holotype of Troticus melamopterus Cameron, 1903 has been examined by the first author and is transferred to the genus Cremnops Foerster, 1862 (C. melamopterus Cameron, 1903 comb. nov.)
Distribution and evolution of starspots on the RS CVn binary II Pegasi in 2004
No full textThis work is supported by National Natural Science Foundation of China through grants Nos. 10373023, 10773027 and 11333006, Chinese Academy of Sciences through project KJCX2-YW-T24.We present Doppler images of RS CVn-type binary II Peg based on two data sets obtained in 2004 February and November. In order to improve signal-to-noise ratio and reliability,we apply least-squares deconvolution technique to calculate average profiles from 2032 photospheric absorption lines. Both of the resulting surface images show a wide latitude distribution of starspots. Most spots are concentrated at a high-latitude belt above 60° and a low-latitude belt near equator. The starspots evolved dramatically between two observing runs, which may indicate shorter time-scale evolution in this epoch, especially for low-latitude belt. There is no stable preferred active longitude that can be found in our images. We also find out a possible phenomenon that the intermediate-latitude spot migrated poleward and merged with the high-latitude spot to make it stronger, which may reveal a more complex behaviour of starspots on II Peg. A potential change of orbital ephemeris zero-point was detected. This may imply an orbital period change of II Peg like other active close binaries.Peer reviewe
Dynamics of plane partitions: Proof of the Cameron and Fon-Der-Flaass conjecture
No full textOne of the oldest outstanding problems in dynamical algebraic combinatorics is the following conjecture of P. Cameron and D. Fon-Der-Flaass (1995): consider a plane partition P in an box . Let denote the smallest plane partition containing the minimal elements of . Then if is prime, Cameron and Fon-Der-Flaass conjectured that the cardinality of the -orbit of P is always a multiple of p. This conjecture was established for by Cameron and Fon-Der-Flaass (1995) and for slightly smaller values of p in work of K. Dilks, J. Striker and the second author (2017). Our main theorem specializes to prove this conjecture in full generality
Nomenclature notes: John J. Cameron to Horace Kephart
No full textThis 1931 correspondence, from John J. Cameron to Horace Kephart, concerns the nomenclature of the Appalachian mountains. Horace Kephart (1862-1931) was a noted naturalist, woodsman, journalist, and author and promoter of the Great Smoky Mountains National Park.f COPY)
UIUfEl) S1'A.;::» GEOGRAPHIC BOAHD
WASHIISGTOB
March 9,1931.
Irr. Horace Kephart,
Bryson C'..ty,Borth Carolina.
; aear Mr. Kephart:
I thank you for four lot tor of March 5.
I an sorry to hear that yon. were do m with the ' "flu",hut
hop© that this Iftftter will 4't. - active a* ov-r.
* board I "-t yet received a copy of your letter
relative to the Great Smoky Mountains, which you have turned
over to llr. vara* Rhode*, teatlYt tareftary of the Borth ■
Carolina Park Commission.
At your convenience, 1 would like to have you send me a
copy of'that letter. -
a
I note your v to to* Incluaioa of the Max Patch
segment with the Great Smoky Mountains. Incidentally, t. -..
a different* among the authorities whom we consulted on this
point.
Th-! revision of local names on the Borth Carolina part
of the Great Smoky Mountains Batiocal Park is certainly
"big undertaking. I can readily understand that there Is much
duplication and reduplication. The state of Berth Carolina
Is to be congratulated that the revision of such names is
being carrlad or? by one who has such a gr*aft love and intimate
knowledge of the region in question.
She board at its last mooting adopted the suggestion of
the ' l.ttee of Borth Caroline and Tennesoee
relative to the transfer of the names Mount Kephart and Mount
Collins, baft *11 B stipulation that the amm Kephart would
not again be disturbed.
I than;?: you for your offer of further cooperation,which
I shall avail my*ftlf of when n**e*sary#
The board "-111 be pleased if ever it can be of service
to you.
Sincerely,
(Signed) John J.Cameron,
ecretary
Microstructural damage sensitivity prediction using spatial statistics
No full text© 2019, The Author(s). The vast compositional space of metallic materials provides ample opportunity to design stronger, more ductile and cheaper alloys. However, the substantial complexity of deformation micro-mechanisms makes simulation-based prediction of microstructural performance exceedingly difficult. In absence of predictive tools, tedious experiments have to be conducted to screen properties. Here, we develop a purely empirical model to forecast microstructural performance in advance, bypassing these challenges. This is achieved by combining in situ deformation experiments with a novel methodology that utilizes n-point statistics and principle component analysis to extract key microstructural features. We demonstrate this approach by predicting crack nucleation in a complex dual-phase steel, achieving substantial predictive ability (84.8% of microstructures predicted to crack, actually crack), a substantial improvement upon the alternate simulation-based approaches. This significant accuracy illustrates the utility of this alternate approach and opens the door to a wide range of alloy design tools
Redescription of Troticus ovalis (Fahringer) comb. nov., its first host record and a note on T. melamopterus Cameron (Hymenoptera: Braconidae: Agathidinae)
No full textDisophrys ovalis Fahringer, 1937 (Hymenoptera: Braconidae: Agathidinae) from Egypt is redescribed and transferred to the genus Troticus Brullé, 1846 (comb. nov.) with Disophrys aegyptiaca Fahringer, 1937, as its junior synonym (syn. nov.). For the first time a reliable host record for the genus and for T. ovalis is given. The holotype of Troticus melamopterus Cameron, 1903 has been examined by the first author and is transferred to the genus Cremnops Foerster, 1862 (C. melamopterus Cameron, 1903 comb. nov.)
Restoring the Republic: A Conservative Manifesto for America’s Future
No full textIn response to liberal attempts to diverge from many American values and ways, some contemporary conservatives have responded by looking backward to what we used to be. Instead, the conservative project should be to transform us into the nation that we were always supposed to be, a project for which Tocqueville can provide guidance.
Author information: Cameron Khansarinia is a graduate of Harvard College. He studied political theory in the Department of Government and wrote his honors thesis on Alexis de Tocqueville’s contemporary relevance under the advisement of Professor Harvey C. Mansfield
Whose problem? Disability narratives and available identities
No full textIn this article, the author demonstrates that contemporary cultural disability discourses offer few positive resources for people with impairments to draw upon in constructing positive personal and social identities. Examining the emergence of the Disability Arts Movement in Britain, consideration is given to alternative discourses developed by disabled people who have resisted the passive roles expected of them and developed a disability identity rooted in notions of power, respect and control. It is suggested that these alternative discourses provide an empowering rather than a disabling basis for community development and community arts practice and should be embraced by workers in these fields
Water solubility enhancement of pyrazolo[3,4-d]pyrimidine derivatives via miniaturized polymer-drug microarrays
No full textA miniaturized assay was optimized to evaluate the enhanced apparent water solubility of pyrazolo[3,4-d]pyrimidine derivatives used extensively as anticancer drug scaffolds. The applied amount of drugs used in the reported strategy ranged from 5-10 μg per formulation which were dispensed by an inkjet 2D printer directly into a 96-well plate. The selected polymer/drug formulations with high water solubility demonstrated improved cytotoxicity against a human lung adenocarcinoma cancer cell line (A549) compared to the free drugs. We attribute the enhanced efficacy to the improved apparent-solubility of the drug molecules achieved via this methodology. This novel miniaturized method showed promising results in terms of water solubility improvement of the highly hydrophobic pyrazolo[3,4-d]pyrimidine derivatives, requiring only a few μg of each drug per tested polymeric formulation. In addition, the reported experimental evidence may facilitate identification of suitable polymers for combination with drug leading to investigations on biological properties or mechanisms of action in a single formulation
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