3,563,567 research outputs found
Termites of the Genus Cryptotermes Banks (Isoptera: Kalotermitidae) from the West Indies
A taxonomic revision of the genus Cryptotermes occurring in the West Indies is given based on recent collections from the Greater Antilles, Lesser Antilles, and the Bahamas. Seventeen indigenous and four nonindigenous species are described from external morphology ofthe soldier. The imago caste is also described for all but one species. The indigenous Cryptotermes comprise twelve new species, including C. aequacornis, C. cryptognathus, C. cylindroceps, C. cymatofrons, C. darlingtonae, C.juliani, C. mangoldi, C. nitens, C.parvifrons,
C. rotundiceps, C. spathifrons, and C. undulans. Five indigenous species are redescribed, including C. cavifrons Banks, C. chasei Scheffrahn, C. hemicyclius Bacchus, C. pyrodomus Bacchus, and C. rhicnocephalus Bacchus. The imagos of C. pyrodomus and C. rhicnocephalus are described for the first time. The four non-indigenous species are redescribed including C. brevis (Walker), C. domesticus (Haviland), C. dudleyi Banks, and C. havilandi (Sj6stedt). A report of C. domesticus in the West Indies could not be confirmed. Distribution maps and a soldier identification key are included for all Cryptotermes in the West Indies and Florida
Physical States and String Symmetries
It is shown that if the momenta belong to an integral lattice, then every
physical state of string theory leads to a symmetry of the scattering
amplitudes. We discuss the role of this symmetry when the momenta are those
provided by the usual D.D.F construction and show that the string compactified
on the torus associated with the self-dual Lorentzian lattice,
possess the Fake Monster Lie algebra as a symmetry.Comment: 14 pages, ( Some references are added.
Macroeconomic risk factors in Australian commercial real estate, listed property trust and property sector stock returns: A comparative analysis using GARCH-M
This paper employs a Generalised Autoregressive Conditional Heteroskedasticity in Mean (GARCH-M) model to consider the effect of macroeconomic factors on Australian property returns over the period 1985 to 2002 Three direct (office, retail and industrial property) and two indirect (listed property trust and property stock) returns are included in the analysis, along with market returns, short, medium and long-term interest rates, expected and unexpected inflation, construction activity and industrial employment and production. In general, the macroeconomic factors examined are found to be significant risk factors in Australian commercial property returns. However, the results also indicate that forecast accuracy in these models is higher for direct office, listed property trust and property stock returns and that the persistence of volatility shocks varies across the different markets, with volatility half lives of between five and seven months for direct retail and industrial property, two and three months for direct office property and less than two months with both forms of indirect property investment
Geology of the Brixton Deverill - East Knoyle district (Wiltshire), 1:10000 sheets ST83NE (Brixton Deverill) and ST83SE (East Knoyle) : part of 1:50000 sheet 297 (Wincanton)
The Brixton Deverill-East Knoyle d i s t r i c t lies at the western endof Salisbury
Plain and encompasses the north-western part of the Vale of Wardour. The
central part of the d i s t r i c t forms part of a dissected plateau developed on
Upper Chalk (Figure 1); this reaches a maximum height of 238 m south-east of
Brixton Deverill. In the north-west, there are prominent escarpments capped
by the Lewes Chalk on either side of the Wylye valley. In the south, the Mere
Fault and associated monoclinal structure play an important part in shaping
the landscape. In the west, the chalk rises steeply on the north side of the
fault from the clay vale to the south. Between West Knoyle and East Knoyle,
the steeply dipping Upper Greensand and Chalk strata give rise to strongly
featured ground.
The principal drainage in the northern part of the d i s t r i c t is
northwards by the River Wylye, the only permanent river on the chalk outcrop
and its tributaries. In the south-central area, drainage is eastwards by a
series of valleys that coalesce just west of Hindon and ultimately join the
River Nadder at Tisbury. In the south, on the clay vale, drainage is southwestwards
by tributaries of the River Lodden, and south-eastwards by
tributaries of the River Nadder. The lowest point in the d i s t r i c t , c.96 m OD,
lies in the southern tract.
Soils developed on the Upper Greensand and most of the Chalk are light
and w e l l drained. However, s o i l s on the West Melbury Chalk, together with some
on the clay-with-flint deposits and Kimmeridge Clay are much heavier and
poorly drained.
Agriculture is a mixture of arable and pasture, with the latter dominant
on the Kimmeridge Clay Vale. There are few woods, with deciduous woods
confined mostly to the clay vale and the relatively newly planted coniferous
plantations on the Chalk and Upper Greensand. Agriculture is the only industry
in the area
Technology and Urban Management. Semiannual Report, October 1, 1967 through March 31, 1968
The projects under Technology and Urban Management (TAUM) have continued during the last few months with considerable success. The individual studies conducted in the City of Oakland and the progress made are described in this report
M-Theory and Hypercharge
We discuss the possibility that the electro-weak and strong interactions
arise as the low energy effective description of branes in M-theory. As a step
towards constructing such a model we show how one can naturally obtain
SU(N_1)\times SU(N_2)\times U(1) gauge theories from branes, including matter
in the bi-fundamental representation of SU(N_1)\times SU(N_2) which are
fractionally charged under U(1).Comment: 29 pages Phyzzx. Two figure
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