Sur les "upwellings" équatorial et côtier (5°N) dans le Golfe de Guinée

Les observations effectuées au cours du programme franco-américain FOCAL/SEQUAL, programme mené en 1983 et 1984 sur l'ensemble du bassin équatorial atlantique, ont permis pour la première fois d'étudier simultanément les "upwellings" équatorial et côtier le long du méridien 4°W. A l'équateur, le coefficient de corrélation montre que le refroidissement d'été boréal de la couche homogène à 4°W est lié conjointement au vent local (0-4°W) et au vent extra-local (1°N-29°W). La remontée de la thermocline à O-4°W dépend donc de la distribution de la composante zonale de la tension du vent, à l'ouest de O-4°W, comme le suggérait la théorie linéaire. Cependant, en février-mars et novembre-décembre, cette remontée n'est pas liée au vent local, car elle est observée respectivement en période de cessation des alizés de sud-est et en présence de vent de sud-ouest qui induit un "downwelling" et non un "upwelling

The elastic I=3/2I=3/2 pp-wave nucleon-pion scattering amplitude and the Δ(1232)\Delta(1232) resonance from Nf=2+1N_{\mathrm{f}}=2+1 lattice QCD

We present the first direct determination of meson-baryon resonance parameters from a scattering amplitude calculated using lattice QCD. In particular, we calculate the elastic $I=3/2$, $p$-wave nucleon-pion amplitude on a single ensemble of $N_{\mathrm{f}}=2+1$ Wilson-clover fermions with $m_{\pi}=280\mathrm{MeV}$ and $m_{K}=460\mathrm{MeV}$. At these quark masses, the $\Delta(1232)$ resonance pole is found close to the $N-\pi$ threshold and a Breit-Wigner fit to the amplitude gives $g^{\mathrm{BW}}_{\Delta N\pi}=19.0(4.7)$ in agreement with phenomenological determinations.Comment: 7 pages, 2 figures. Agrees with published version, one additional phase shift point and clarification of different coupling convention

Environmental education in secondary schools in metropolitan Durban : opportunities and constraints in the use of the natural environment

Bibliography: leaves 168-177.The study is placed in the context of the development of Environmental Education and the integral role of fieldwork in fulfilling its objectives. The requirements of teachers regarding the use of natural areas for environmental/ecological fieldwork were investigated by means of two surveys which used open-ended questions and numerical rating scales. An exploratory postal survey of school principals was used to investigate the current use of natural areas by schools and the relative importance of constraints upon fieldwork. It was found that, while most White schools made some formal use of natural areas, fewer Asian and Coloured schools did so, and fieldwork amongst Black schools was almost non-existent. Extra curricular fieldwork was primarily a phenomenon in White schools. Constraints varied in importance between schools in different education departments but overall a lack of teacher training in fieldwork was the major constraint. Interviews with a sample of teachers who had used natural areas provided detailed information on their environmental/ecological fieldwork requirements. Three hypotheses relating to factors influencing teacher choice of fieldwork sites were tested. In this regard it was found that certain intrinsic characteristics of natural areas, and the availability of teaching resources (including site-specific training and educational field officers) were important influences. Increasing transport costs, while often a secondary consideration, may increase the future demand for local fieldwork sites. The specific characteristics and facilities required of natural areas were investigated in detail. The study concluded that the Durban Metropolitan Open Space System has considerable potential to meet the environmental fieldwork requirements of schools. Towards this end a set of criteria for selecting appropriate natural areas, and a list of priorities for developing them, were established

Infinite Islands: The Seatrees

Infinite Islands: The Seatrees investigates on the subject of infinity as it relates to storytelling and the novel. The critical introduction lays out the relation between reality, fantasy, the imagination and the history of the novel as a source of inspiration for the fictional portion of the dissertation. It considers the similarities between canonical literary novels and fantasy genre novels. Through this consideration, aspects of reality and fantasy in the novel are considered in both theoretical and primary texts. In the fictional portion, an unnamed narrator is retelling the story of his life from beginning to end. Although he works to gain control over his life and pursue his hope of joining a secretive group, he continually becomes caught up in forces more powerful than an individual, only some of which can he ever understand