Teaching Reading: The Science and the Art

For some time I have been thinking of this august occasion and of its topic, Teaching Reading: The Science and the Art. And at a recent convention while listening to a brilliant monologist and teacher, I there wished that I could have changed the title of my speech to Look, look. Come, come. See Charlotte\u27s Web. I think that title brings the concepts of teaching reading as a science and an art to the realities of classrooms, some very human teachers, and some little children who may very well need to appreciate and recognize the simplicity of look, look before they can enjoy the beauty and charm of Charlotte\u27s Web

Plant Names: A Guide to Botanical Nomenclature (3rd edition), 2007, R. Spencer., R. Cross and P. Lumley, CABI Publishing Oxfordshire, UK, Price: £17.05, Soft cover, 162 pages including colour photographs, Website: www.amazon.co.uk

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Development of an equatorial carbonate platform across the Triassic-Jurassic boundary and links to global palaeoenvironmental changes (Musandam Peninsula, UAE/Oman)

The Triassic - Jurassic boundary is marked by one of the ‘big five’ mass extinctions of the Phanerozoic. This boundary event was accompanied by several carbon cycle pert urbations, potentially induced by the opening of the Central Atlantic and associated volcanism, and accompanied by an ocean acidification event. Continuous carbonate successions covering this interval of environmental change are however rare. Here data fro m a shallow - marine equatorial mixed carbonate - siliciclastic succession is presented, that was studied on a regional scale. Four sections that are 48 km apart were examined on the Musandam Peninsula (United Arab Emirates and Sultanate of Oman). The system w as analysed for its sedimentology, vertical and lateral facies changes, and stable carbon and oxygen isotopes. Strontium isotope analysis was used to determine the position of the Triassic - Jurassic boundary horizon. The studied ramp experienced an episode of demise during the Late Triassic, followed by a restricted microbialite dominated ramp, containing large amounts of siliciclastic facies. During the Latest Triassic the diverse carbonate factory revived and flourished across the Triassic - Jurassic boundar y. No clear evidence for a biocalcification crisis or an ocean acidification event across the Triassic - Jurassic boundary is visible. Lateral facies heterogeneities can be observed across the studied interval, attributed to hydrodynamic activity, including tropical storms, crossing the extensive shelf area. Although evidence for synsedimentary tectonic activity is present, the vertical stacking pattern is largely controlled by changes in relative sea level. The refined chronostratigraphy accompanied by the d etailed environment of deposition analysis allows for a refinement of the regional palaeogeography. The neritic equatorial carbonate ramp has archived a negative carbon isotope excursion preceding the Triassic - Jurassic boundary that has also been reported from other study sites. The lack of evidence for a biocalcification crisis across the equatorial Triassic - Jurassic boundary indicates that the Tethys did not experience a distinct global acidification event

Lasiosiphon rigidus, a new species from the Tankwa Karoo and two new combinations in the genus for South Africa

Thymelaeaceae are well represented in southern Africa, with ± 190 species in nine genera (Bredenkamp & Beyers 2000; Beaumont et al. 2009). Preliminary phylogenetic analyses of nuclear and plastid DNA sequences (Van der Bank et al. 2002; Beaumont et al. 2009) indicate the need for substantial revision in the generic circumscriptions in subfamily Thymelaeoideae.Web of Scienc

Two new species of Trachyandra sect. Liriothamnus (Xanthorrhoeaceae, Asphodeloideae) from the Western and Eastern Cape Provinces of South Africa

Trachyandra eriocarpa and T. bulbosa are two new species from Northern and Eastern Cape Provinces of South Africa. They are placed in T. sect. Liriothamnus based on their wiry roots, the cataphylls not forming membranous collars, and the remains of the outer leaves forming a fibrous collar. Trachyandra eriocarpa from the Great Winterberg in Eastern Cape is recognised by its unusual, villous ovary and capsules; and T. bulbosa from north of Springbok in Northern Cape by the irregular, bulbous rhizome, microscopically puberulous leaves and maculate tepals.Web of Scienc

A new name in southern African Justicia L. (Acanthaceae)

Background: Ongoing systematic studies in the African flora necessitate periodic nomenclatural adjustments and corrections. Objectives: The objective of this study was to effect requisite nomenclatural changes. Method: Relevant literature was consulted and type specimens were examined. Results: One nomenclatural correction is required in Justicia L. (Acanthaceae). Conclusion: The replacement name Justicia conferta J.C.Manning Goldblatt is provided for the illegitimate homonym Justicia densiflora (Hochst.) J.C.Manning Goldblatt, and the validity of the combination Justicia andromeda (Lindau) J.C.Manning Goldblatt is clarified

New synonyms and combinations in Drimia Jacq. (Hyacinthaceae) in southern Africa

Background: Ongoing systematic studies in the African flora necessitate periodic nomenclatural adjustments and corrections. Objectives: To effect requisite nomenclatural changes. Method: Relevant literature was surveyed and relevant material was examined. Results: Nomenclatural adjustments are provided for recently described taxa of Hyacinthaceae subfamily Urgineoideae in order to accommodate them in the alternative classification system in use in South African herbaria. Conclusion: A broadly circumscribed Drimia Jacq. has the advantages of nomenclatural stability and utility. The newly described segregate genera Austronea Mart.-Azorín et al. and Zingela N.R.Crouch et al. are formally included in Drimia, and A. densiflora Mart.-Azorín et al., A. hispidoplicata Mart.-Azorín et al. and A. pinguis Mart.-Azorín et al. are transferred to that genus as D. densiflora (Mart.-Azorín et al.) J.C.Manning Goldblatt, D. hispidoplicata(Mart.-Azorín et al.) J.C.Manning Goldblatt and D. pinguis (Mart.-Azorín et al.) J.C.Manning Goldblatt, respectively, whereas A. grandiflora Mart.-Azorín et al. and A. linearis Mart.-Azorín et al. are treated as synonyms of D. vermiformis J.C.Manning Goldblatt; A. olifanta Mart.-Azorín et al. is treated as a synonym of D. barkerae Oberm. ex J.C.Manning Goldblatt; and A. papillosa Mart.-Azorín et al. and A. pygmaea (A.V. Duthie) Mart.-Azorín et al. are treated a synonyms of D. virens (Schltr.) J.C.Manning Goldblatt. Zingela pooleyorum N.R.Crouch is considered to be conspecific with Urginea zambesiacaBaker, for which the new combination D. zambesiaca (Baker) J.C.Manning Goldblatt is provided. The combination D. zebrina (Mart.-Azorín et al.) J.C.Manning Goldblatt is provided for an allied species. Examination of recent collections of Ornithogalum toxicarium C.Archer R.H.Archer confirms that it is actually a species of Drimia and it is accordingly transferred to that genus as D. toxicaria (C.Archer R.H.Archer) J.C.Manning Goldblatt

(Carbonyl-1κC)bis­[2,3(η5)-cyclo­penta­dien­yl][μ3-(S-methyl trithio­carbonato)methylidyne-1:2:3κ4 C,S′′:C:C](triphenyl­phosphine-1κP)(μ3-sulfido-1:2:3κ3 S)dicobalt(II)iron(II) trifluoro­methane­sulfonate

The asymmetric unit of the title compound, [FeCo2(C5H5)2(C3H3S3)S(C18H15P)(CO)]CF3SO3, consists of a triangular irondicobalt cluster cation and a trifluoro­methane­sulfonate anion. In the cation, the FeCo2 triangle is symmetrically capped on one face by an S atom and on the other by a C atom linked to a methyl trithio­carbonate residue that bridges the Fe—C bond. Each Co atom carries a cyclo­penta­dienyl ligand while the Fe atom coordinates to one carbonyl and one triphenyl­phosphine ligand. In the crystal structure, the cation is linked to the anion by a number of weak non-classical C—H⋯O and C—H⋯F hydrogen bonds and weak S⋯O (3.317 Å) and S⋯F (3.198 Å) inter­actions. The structure is further stabilized by additional inter­molecular C—H⋯O, C—H⋯F and O⋯O (2.942 Å) contacts, together with an unusual S⋯π(Cp) inter­action (S⋯centroid distance = 3.385 Å), generating an extended network

NASA/LaRC jet plume research

The following provides a summary for research being conducted by NASA/LaRC and its contractors and grantees to develop jet engine noise suppression technology under the NASA High Speed Research (HSR) program for the High Speed Civil Transport (HSCT). The objective of this effort is to explore new innovative concepts for reducing noise to Federally mandated guidelines with minimum compromise on engine performance both in take-off and cruise. The research program is divided into four major technical areas: (1) jet noise research on advanced nozzles; (2) plume prediction and validation; (3) passive and active control; and (4) methodology for noise prediction