4,491 research outputs found
SLiM: a code for the simulation of wave propagation through an inhomogeneous, magnetised solar atmosphere
No full textIn this paper we describe the semi-spectral linear MHD (SLiM) code which we have written to follow the interaction of linear waves through an in homogeneous three-dimensional solar atmosphere. The background model allows almost arbitrary perturbations of density, temperature, sound speed as well as magnetic and velocity fields. We give details of several of the tests we have used to check the code. The code will be useful in understanding the helioseismic signatures of various solar features, including sunspots
Interpreting the Outsider Tradition in British European Policy Speeches from Thatcher to Cameron
No full textThe article investigates how British European policy thinking has been informed by what it identifies as an ‘outsider’ tradition of thinking about ‘Europe’ in British foreign policy dating from imperial times to the presen. The article begins by delineating five phases in the evolution of the outsider tradition through a survey of the relevant historiography back to 1815. The article then examines how prime ministers from Margaret Thatcher to David Cameron have looked to various inflections of the outsider tradition to inform their European discourses. The focus in the speech data sections is on British identity, history and the realist appreciation of international politics that informed the leaders’ suggestions for EEC/EU reform. The central argument is that historically informed narratives such as those making up the outsider tradition do not determine opinion-formers’ outlooks, but that they can be deeply impervious to rapid change
Deformation density studies of ring systems. 2. The deformation density of the diazirine ring in the X-ray structure of 3-[(p-Nitrophenoxy) methyl]-3-chlorodiazirine
No full textThe crystal structure and electron density of 3-[(p-nitrophenoxy)methyl]-3-chlorodiazirine have been analyzed using single crystal X-ray diffraction at 208 K with Mo K alpha radiation to a resolution of sin(theta(max))/lambda = 1.126 Angstrom(-1). A total of 10 440 measured reflections gave 7742 unique reflections with R(m) = 0.026. A multipole atomic density model was fitted to these reflections to give an R(F) = 0.0311. The deformation density of the phenyl portion of the compound is as expected. The dynamic deformation density of the diazirine ring, however, suggests that the bonding in the three-membered ring is a combination of the classical severely-strained cr bonding system with a significant contribution of a a donation from the N=N to an sp(2) carbon. This observation is placed in the context of similar proposals for the bonding in cyclopropanes.PT: J; CR: ALLEN FH, 1987, J CHEM SOC PERK T 2, S1 BAERT F, 1982, ACTA CRYSTALLOGR A, V38, P143 BATTAGLIA R, 1980, Z NATURFORSCH B, V35, P719 BLESSING R, ACA T, P26 CAMERON TS, 1992, J AM CHEM SOC, V114, P1889 CAMERON TS, 1994, J AM CHEM SOC, V116, P1211 CREMER D, 1985, J AM CHEM SOC, V107, P3800 CREMER D, 1985, J AM CHEM SOC, V107, P3811 DEWAR MJS, 1979, J AM CHEM SOC, V101, P783 DOMENICANO A, 1975, ACTA CRYSTALLOGR B, V31, P221 DUNITZ JD, 1983, HELV CHIM ACTA, V66, P123 HANSEN NK, 1978, ACTA CRYSTALLOGR A, V34, P909 HIRSHFELD FL, 1991, CRYST REV, V2, P169 LINDEN A, 1988, J ORG CHEM, V53, P1085 LIU MTH, 1986, J CHEM SOC PERK T 2, P211 SCHMIDT MW, 1990, QCPE B, V10, P52 SEILER P, 1988, HELV CHIM ACTA, V71, P2100 SMITH VH, 1977, ISRAEL J CHEM, V16, P87 SOUHASSOU M, 1992, J AM CHEM SOC, V114, P2371 STEINER T, 1993, ACTA CRYSTALLOGR A, V49, P379 STEVENS IDR, 1990, J CHEM SOC P2, P661 STEWART RF, 1969, J CHEM PHYS, V51, P4569 WALSH AD, 1949, T FARADAY SOC, V45, P179 WIBERG KB, 1987, J AM CHEM SOC, V109, P985; NR: 24; TC: 4; J9: J AMER CHEM SOC; PG: 7; GA: NV421Source type: Electronic(1
Base sizes for simple groups and a conjecture of Cameron
No full textLet G be a permutation group on a finite set ?. A base for G is a subset B C_ ? whose pointwise stabilizer in G is trivial; we write b(G) for the smallest size of a base for G. In this paper we prove that b(G) ? if G is an almost simple group of exceptional Lie type and is a primitive faithful G-set. An important consequence
of this result, when combined with other recent work, is that b(G) ? 7 for any almost simple group G in a non-standard action, proving a conjecture of Cameron. The proof is probabilistic and uses bounds on fixed point ratios
Preparation and crystal structure of 3-(1-naphthylmethyl)-3-chlorodiazirine
No full textPT: J; CR: 1974, INT TABLES XRAY CRYS, V4 BATTAGLIA R, 1980, Z NATURFORSCH B, V35, P719 CAMERON TS, 1979, ACTA CRYSTALLOGR B, V35, P749 GERMAIN G, 1971, ACTA CRYSTALLOGR A, V27, P368 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 HEINE HW, 1983, SMALL RING HETEROCYC, V2, P547 HENCHER JL, 1967, J AM CHEM SOC, V89, P5527 KISCH H, 1987, CHEM DIAZIRINES, CH10 LIU MTH, 1982, CHEM SOC REV, V11, P127 MOFFAT JB, 1978, CHEM DIAZONIUM DIA 1 PIERCE L, 1962, J AM CHEM SOC, V84, P2651 SCHARPEN LH, 1969, J CHEM PHYS, V50, P2063 SCHMITZ E, 1979, ADV HETEROCYCL CHEM, V24, P63 SHELDRICK GM, 1976, SHELX 76 PROGRAM CRY WOLLRAB JE, 1968, J CHEM PHYS, V49, P2405 WOLLRAB JE, 1969, J CHEM PHYS, V51, P1585 WOLLRAB JE, 1970, J CHEM PHYS, V53, P1543; NR: 17; TC: 11; J9: J ORG CHEM; PG: 3; GA: M3719Source type: Electronic(1
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
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
Alex M. Cameron, Power Without Law. The Supreme Court of Canada, .the Marshall Decisions, and the Failure of Judicial Activism
No full textAlex Cameron\u27s book, Power WithoutLaw, is a scathing critique ofthe Supreme Court of Canada\u27s 1999 decisions in R. v. Marshall upholding Donald Marshall Jr.\u27s Mi\u27kmaq treaty claim. Cameron\u27s book has attracted a lot of attention because of the author\u27s position as Crown counsel for the government of Nova Scotia. Cameron was not involved as a lawyer in the Marshallcase itself. As a fisheries prosecution, Marshallwas a matter of federal jurisdiction pursuant to s. 91(12) of the Constitution Act, 1867, and Nova Scotia chose not to intervene. However, Cameron did become involved in a subsequent case dealing with the same series of treaties but different accused, R. v. Stephen Marshall; . v.Bernard, 4 which involved logging and was thus a matter of provincial jurisdiction. Cameron, who had been a staff lawyer in the civil litigation section of the Nova Scotia Department of Justice, was appointed as a Crown attorney (co-counsel) in the Public Prosecution Service (PPS) for the purposes of the appeals in the Stephen Marshallcase. It was that involvement that brought Cameron to the view that the Supreme Court of Canada had wrongly decided the 1999 Marshallcase, (8) and ultimately to write the book
Small fibre neuropathy: Role in the diagnosis of diabetic sensorimotor polyneuropathy
No full textSmall fibres constitute 70-90% of peripheral nerve fibres and regulate several key functions such as tissue blood flow, temperature and pain perception as well as sweating, all of which are highly relevant to the clinical presentation and adverse outcomes associated with foot ulcerations in patients with diabetes. Recent studies demonstrated significant abnormalities in the small fibres in subjects with impaired glucose tolerance and diabetes, despite normal electrophysiology, suggesting that the earliest nerve fibre damage is to the small fibres. Unfortunately, guidelines and consensus statements focus on large fibres and continue to advocate electrophysiology as a diagnostic modality and as a primary end point for the assessment of therapeutic benefit. (In part, this reflects the difficulties in quantifying small fibre dysfunction and damage.) We have therefore critically assessed currently available techniques that measure small fibre dysfunction in diabetic neuropathy, using quantitative sensory and sudomotor testing. We have assessed the role of identifying structural damage by quantifying intraepidermal nerve fibre density in skin biopsies and corneal nerve morphology using corneal confocal microscopy. Finally, we propose a definition for diabetic neuropathy that incorporates small fibre damage. © 2011 John Wiley & Sons, Ltd
On base sizes for actions of finite classical groups
No full textLet G be a finite almost simple classical group and let
? be a faithful primitive non-standard G-set. A base for G is a subset B C_ ? whose pointwise stabilizer is trivial; we write b(G) for the minimal size of a base for G. A well-known conjecture of Cameron and Kantor asserts that there exists an absolute constant c such that b(G) ? c for all such groups G, and the existence of such an undetermined constant has been established by Liebeck and Shalev. In this paper we prove that either b(G) ? 4, or G = U6(2).2, G? = U4(3).22 and b(G) = 5.
The proof is probabilistic, using bounds on fixed point ratios
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