214,344 research outputs found
PS 1999-2009 - Amsterdam
No full text‘PS 1999-2009’ was held in two locations: PS Gallery, Amsterdam and then the Kunstruimte09 Museum in Groningen, The Netherlands. PS Gallery is both an artist-run space and a commercial gallery which aims to develop a platform for the exhibition of conceptually based practices from international artists. Kunstruimte09 is a museum dedicated to the ongoing research into non-objective practices of international artists, through both traditional and historical focuses as well as more non-traditional ideas related to this field.
Both exhibitions were curatorial focused on presenting artwork from all the artists who have exhibited with PS throughout their 10 year history
PS 1999-2009
No full textPS gallery is both an artist-run space and a commercial gallery which aims to develop a platform for the exhibition of conceptually based practices from international artists. This exhibition ‘PS 1999-2009’ was held in two locations: PS gallery first and then the Kunstruimte09 Museum in Groningen, The Netherlands. Both exhibitions were curatorial focused on presenting artwork from all the artists who have exhibited with PS throughout their 10 year history
Wavelength tunable 10-GHz 3-ps pulse source using a dispersion decreasing fiber-based nonlinear optical loop mirror
No full textWe experimentally demonstrate the use of a dispersion decreasing fiber (DDF)-based nonlinear optical loop mirror (NOLM) for the generation of wavelength tunable soliton-like pulses at a repetition rate of 10 GHz. We compress ~12 ps Gaussian pulses from an electro-absorption modulator (EAM) (followed by 125 m of DCF for preliminary linear dispersion compensation) into 3 ps pedestal-free pulses using both high-order soliton compression and nonlinear switching effects within an 8.5 km DDF-based loop mirror. The output pulses from the DDF-based NOLM show considerable pedestal reduction compared to those obtained by directly compressing the EAM seed pulses via a single passage through the DDF. Wavelength tuning of the compressed pulses over a ~15 nm bandwidth (from 1541 to 1556 nm) is demonstrated without a significant increase in pulse duration or degradation in pulse quality
PS: The Preventive Maintenance Monthly. Issue 18, 1954 series.
No full textArmy Field Forces were impressed with the results of Army Motors, an Ordinance Corps monthly magazine, and how it encouraged preventive maintenance. At the Army's request, Will Eisner produced PS Magazine in 1951, with each issue containing a short comic story and numerous illustrations. In 2001, Joe Kubert contracted to provide art work for PS Magazine. March 2002 issue featured Spider-Man, and the May 2004 issue was the spotlight of a copyright dispute because it featured a parody Harry Potter. The case was ruled as parody. Among a long list of other references to appear in PS: Star Trek and David Bowie. Many issues are available online- both the Virginia Commonwealth University and the U.S. Army have collections. Visit the links below: ,https://www.logsa.army.mil/psmag/psonline.cf
EXCITATION AND DELAYED ANNIHILATION OF PS IN A LASER FIELD
No full textFaisal F, RAY PS. EXCITATION AND DELAYED ANNIHILATION OF PS IN A LASER FIELD. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. 1981;14(21):L715-L719
Comparing molecular photofragmentation dynamics in the gas and liquid phases
No full textThis article explores the extent to which insights gleaned from detailed studies of molecular photodissociations in the gas phase (i.e. under isolated molecule conditions) can inform our understanding of the corresponding photofragmentation processes in solution. Systems selected for comparison include a thiophenol (p-methylthiophenol), a thioanisole (p-methylthioanisole) and phenol, in vacuum and in cyclohexane solution. UV excitation in the gas phase results in RX-Y (X = O, S; Y = H, CH3) bond fission in all cases, but over timescales that vary by similar to 4 orders of magnitude - all of which behaviours can be rationalised on the basis of the relevant bound and dissociative excited state potential energy surfaces (PESs) accessed by UV photoexcitation, and of the conical intersections that facilitate radiationless transfer between these PESs. Time-resolved UV pump-broadband UV/visible probe and/or UV pump-broadband IR probe studies of the corresponding systems in cyclohexane solution reveal additional processes that are unique to the condensed phase. Thus, for example, the data clearly reveal evidence of (i) vibrational relaxation of the photoexcited molecules prior to their dissociation and of the radical fragments formed upon X-Y bond fission, and (ii) geminate recombination of the RX and Y products (leading to reformation of the ground state parent and/or isomeric adducts). Nonetheless, the data also show that, in each case, the characteristics (and the timescale) of the initial bond fission process that occurs under isolated molecule conditions are barely changed by the presence of a weakly interacting solvent like cyclohexane. These condensed phase studies are then extended to an ether analogue of phenol (allyl phenyl ether), wherein UV photo-induced RO-allyl bond fission constitutes the first step of a photo-Claisen rearrangement.</p
PS - public space research
No full text'PS - public space research' offers research on the production, use, past and future of material public spaces, with a focus on the role of design and designers. It is a response to a growing anxiety about the increasing privatisation of public space, and the demand for greater democratic authorship and ownership of it. This requires a wider and deeper examination of the neglected roles of the designer and design, which are as important to a discussion of the public realm as the debate about who constitutes ‘the public’.
PS hosts research material from a three-year AHRC-FAPESP research project, 'Public Spaces and the Role of the Architect: a comparative study of influential modernist and contemporary examples in London and São Paulo'. It is intended to serve as a resource for scholars and students researching in the same subject area
A Rule-Based Consultant for Accelerator Beam Scheduling Used in the CERN PS Complex
No full textThe CERN PS accelerator complex consists of nine interacting accelerators which work together to produce
particle beams for different end users, varying in particle type, energy, time structure, and geometry. The beam
production schedule is time sliced and depends on the current operational requirements and dynamically on the
accelerator status, so that production schedule changes occur in real time. Many potential schedules are not valid due
to various system constraints and these constraints vary over time as new operational modes are introduced. In order
to ensure that only valid schedules are given to the complex, an automated tool has been developed to indicate
whether a potential schedule is valid or not. This presentation describes the method by which the validity of a beam
schedule is determined and how this method was implemented using a rule-based approach based on SQL, avoiding
the use of an expert system shell. Both the data to instantiate the rules and the rules themselves are kept in an Oracle
data base. The SQL interpreter provides the inference engine for this knowledge-based system. A few examples are
presented and the running experience with the tool is discussed
PS Atiyah: an academic autobiography
No full textPS Atiyah (1931–2018) was one of the world’s great legal scholars of the twentieth century and formerly Professor of English Law at the University of Oxford. He made immense contributions to, in particular, the law of contract and the law of torts.
Atiyah’s principal works include The Rise and Fall of Freedom of Contract, The Sale of Goods, An Introduction to the Law of Contract, Pragmatism and Theory in English Law, The Damages Lottery, Form and Substance in Anglo-American Law and Accidents, Compensation and the Law.
His work is of enduring relevance. His autobiography sheds light on his research and on the state of the academy in the second half of the previous century
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