Search for isotropic γ radiation in the cosmological window between 65 and 200 TeV

Electromagnetic energy injected into the universe above a few hundred TeV is expected to pile up as γ radiation in a relatively narrow energy interval below 100 TeV due to its interaction with the 2.7^°K background radiation. We present an upper limit (90% C.L.) on the ratio of primary γ to charged cosmic rays in the energy interval 65–160 TeV (80–200 TeV) of 10.3 • 10^−3 (7.8 • 10^−3). Data from the HEGRA cosmic-ray detector complex consisting of a wide angle Čerenkov array (AIROBICC) measuring the lateral distribution of air Čerenkov light and a scintillator array, were used with a novel method to discriminate γ-ray and hadron induced air showers. If the presently unmeasured universal far infrared background radiation is not too intense, the result rules out a topological-defect origin of ultrahigh energy cosmic rays for masses of the X particle released by the defects equal to or larger than about 10^16 GeV.

Kinetic study of thermal 1,3-dipolar cycloaddition of azomethine ylides using differential scanning calorimetry as monitoring window

Kinetics of 1,3-dipolar cycloaddition involving azomethine ylides, generated from thermal [1,2]-prototropy of the corresponding imino ester, employing differential scanning calorimetry (DSC), is surveyed. Glycine and phenylalanine derived imino esters have different behavior. The first one prefers reacting with itself at 75 ºC, rather than with the dipolarophile. However, the α-substituted imino ester gives the cycloadduct at higher temperatures. The thermal dynamic analysis by 1H NMR of the neat reaction mixture of the glycine derivative reveals the presence of signals corresponding to the dipole in very small proportion. The non-isothermal and isothermal DSC curves of the cycloaddition of phenylalaninate and diisobutyl fumarate are obtained from freshly prepared samples. The application of known kinetic models and mathematical multiple non-linear regressions (NLR) allow to determine and to compare Ea, lnA, reaction orders, and reaction enthalpy. Finally a rate equation for each different temperature can be established for this particular thermal cycloaddition.

Morocco at the Crossroads: Seizing the window of opportunity for sustainable development. MEDPRO Technical Report No. 2/April 2011

The question of state sustainability is highly relevant in the case of Morocco. Despite the image of a modernising and liberalising country, Morocco is undergoing a delicate phase in its development. The recent upheavals in the Maghreb and the Middle East alongside the growing problems of poor education and high unemployment are likely to bring to the surface the unsustainable elements of Morocco’s status quo. The central issues concern the quality of institutions, reforms aimed at promoting the rule of law, curbing corruption and overhauling the judiciary. This paper will argue that while institutional quality is a pre-requisite for successful and sustainable socioeconomic performance, this cannot be achieved unless major reforms in the political system are carried out. There exists a window of opportunity to accelerate reforms and to address the acute centralisation of Moroccan politics and decision-making, the lack of accountability of the monarchic institutions, as well as the fragility of representative bodies, such as parties and trade unions. Seizing this window of opportunity could spare Morocco a period of instability, while also assuring continuity in the framework of the transition that started in 1999 when the new king came to power.

Bay window of our room at Mrs. Schryrus on Washington. Minnie Nemby and Fanny Read. January 19 - '89

On verso: Bay window of our room at Mrs. Schryus on Washington - Minnie Nemby & Fanny Read. Jan. 19 '89

The illustrated dictionary of gardening : a practical and scientific encyclopaedia of horticulture for gardeners and botanists /

"Reference to illustrations of plants other than those figured in this work" precedes text in each volume.

New description of Blenheim, the seat of His Grace the Duke of Marlborough: : containing a full and accurate account of the paintings, tapestry, and furniture; a picturesque tour of the gardens and park; and a general description of the China Gallery, &c., with a preliminary essay on landscape gardening. ...

Author identified in Halkett and Laing (2nd ed.).

Practical help on landscape gardening : how to get illustrated lectures, advice, and plans for home grounds, streets, roads, library, school and other public grounds /

Cover title.

Every woman her own flower gardener : a handy manual of flower gardening for ladies /

Mode of access: Internet.

Cassell's popular gardening /

Includes index.

The new American gardener; containing practical directions on the culture of fruits and vegetables; including landscape and ornamental gardening, grape-vines, silk, strawberries, &c. &c.

Mode of access: Internet.