The Royal Fine Art Commission and 75 years of English design review: the final 15 years, 1984–1999

This paper is the second of two linked papers that focus on the work of the Royal Fine Art Commission (RFAC), which for three quarters of a century held the mantel of the UK Government’s advisor on design in the built environment. This paper tells the story of the organization’s final 15 years when, under a new and charismatic leader, the Commission substantially changed its modus operandi, and came out of the shadows, although without ever fully embracing the modern era of government. Analysis of the archives are supplemented by what the limited available literature tells us about the RFAC and by a small number of interviews with key stakeholders with first-hand experience of the operation of the RFAC; those who either worked for it, were responsible for it within Government, or were reviewed by it. The experience offers valuable insights into the practices and problematics of design governance that today, internationally, forms one of the keystones of modern day planning

Pulse generation without gain-bandwidth limitation in a laser with self-similar evolution

With existing techniques for mode-locking, the bandwidth of ultrashort pulses from a laser is determined primarily by the spectrum of the gain medium. Lasers with self-similar evolution of the pulse in the gain medium can tolerate strong spectral breathing, which is stabilized by nonlinear attraction to the parabolic self-similar pulse. Here we show that this property can be exploited in a fiber laser to eliminate the gain-bandwidth limitation to the pulse duration. Broad (̃200 nm) spectra are generated through passive nonlinear propagation in a normal-dispersion laser, and these can be dechirped to ̃20-fs duration

Band structure approach to the resonant x-ray scattering

We study the resonance behaviour of the forbidden 600 and 222 x-ray Bragg peaks in Ge using LDA band structure methods. These Bragg peaks remain forbidden in the resonant dipole scattering approximation even taking into account the non local nature of the band states. However they become allowed at resonance if the eigenstates of the unoccupied conduction band involve a hybridization of p like and d like atomic states. We show that the energy dependence of the resonant behaviour, including the phase of the scattering, is a direct measure of this p-d hybridization.and obtain quantitative agreement with experiment. A simple physical picture involving a product of dipole and quadrupolar transition matrix elements explains this behaviour and shows that it should be generally true for cases where the resonating atom is not at an inversion center. This has strong implications for the description of the resonance behavior of x-ray scattering in materials where the resonant atom is not at an inversion center such as V2O3 and in ferro and antiferro electric and piezo electric materials in general.Comment: 4 pages, 5figure

Survival of bacterial isolates exposed to simulated Jovian trapped radiation belt electrons and solar wind protons

With missions to Jupiter, the spacecraft will be exposed for extended duration to solar wind radiation and the Jovian trapped radiation belt. This study is designed to determine the effect of these radiation environments on spacecraft bacterial isolates. The information can be used in the probability of contamination analysis for these missions. A bacterial subpopulation from Mariner Mars 1971 spacecraft (nine sporeforming and three nonsporeforming isolates) plus two comparative organisms, Staphylococcus epidermidis ATCC 17917 and a strain of Bacillus subtilis var. niger, were exposed to 2-, 12-, and 25-MeV electrons at different doses with simultaneous exposure to a vacuum of 0.0013 N/sqm at 20 and -20 C. The radioresistance of the subpopulation was dependent on the isolate, dose, and energy of electrons. Temperature affected the radioresistance of only the sporeforming isolates. Survival data indicated that spores were reduced approximately 1 log/1500 J/kg, while nonsporeforming isolates (micrococci) were reduced 1.5 to 2 logs/1500 J/kg with the exception of an apparent radioresistant isolate whose resistance approached that of the spores. The subpopulation was found to be less resistant to lower energy than to higher energy electrons

The Royal Fine Art Commission and seventy-five years of English design review: the first sixty years, 1924-1984

This paper is the first of two linked papers that focus on the work of the Royal Fine Art Commission (RFAC), which, for three quarters of a century, held the mantel of the UK Government’s advisor on design in the built environment for England and Wales. The paper draws on archival and documentary evidence to explore the important work and concerns of the RFAC from its creation in 1924 and its early years, through to the post-war construction boom and into the 1980s and a new less paternalistic era of government. Analysis of the archives is supplemented by what the limited available literature tells us about the RFAC. As the instigator of a national design review service covering England and Wales, the work of the RFAC forms an important context for understanding more recent approaches to design review, both in the UK and internationally, that today form a critical component of contemporary planning practices

Ultrafast Raman laser mode-locked by nanotubes

We demonstrate passive mode-locking of a Raman fiber laser using a nanotube-based saturable absorber coupled to a net normal dispersion cavity. This generates highly chirped 500 ps pulses. These are then compressed down to 2 ps , with 1.4 kW peak power, making it a simple wavelength-versatile source for various applications

Ursinus College Bulletin, Fall 1984

At issue: Communicating about the college • Internships: Scholarship blooms in the marketplace • Ultimate intern • Her students say she\u27s first class • Scotland: Where ancient history meets modern trauma • Donations up 25.4% • Staff hired, promoted • Davidson elected to MAC • Bearing up: Bruin will help ease the loss • Alumni host hockey team • Coach of year • Faculty has eight new members • Class of 1988 arrives • Counselors • Association elects officers • Ursinus teachers tops • On the field: Bronze Cinderella story for field hockey team • Heroes to be honored 50 years later • Fall sports schedule • 400 join the A-Day invasion • Class notes • Vintage retirement • His work is his castle • Marriages • Births • Deaths • Take me out to the Yakyu game • Letters to the editorhttps://digitalcommons.ursinus.edu/new_bulletin/1040/thumbnail.jp

Synthetic biology and biomass conversion: a match made in heaven?

To move our economy onto a sustainable basis, it is essential that we find a replacement for fossil carbon as a source of liquid fuels and chemical industry feedstocks. Lignocellulosic biomass, available in enormous quantities, is the only feasible replacement. Many micro-organisms are capable of rapid and efficient degradation of biomass, employing a battery of specialized enzymes, but do not produce useful products. Attempts to transfer biomass-degrading capability to industrially useful organisms by heterologous expression of one or a few biomass-degrading enzymes have met with limited success. It seems probable that an effective biomass-degradation system requires the synergistic action of a large number of enzymes, the individual and collective actions of which are poorly understood. By offering the ability to combine any number of transgenes in a modular, combinatorial way, synthetic biology offers a new approach to elucidating the synergistic action of combinations of biomass-degrading enzymes in vivo and may ultimately lead to a transferable biomass-degradation system. Also, synthetic biology offers the potential for assembly of novel product-formation pathways, as well as mechanisms for increased solvent tolerance. Thus, synthetic biology may finally lead to cheap and effective processes for conversion of biomass to useful products