985 research outputs found
Inventory for a Reverse Journey. Photographic Image and Found Object - An investigation of travel and material transformation as a paradigm of artist's practice: Ed Ruscha, Douglas Huebler, Bas jan Ader, Jimmie Durham, Gustav Metzger, Kurt Schwitters & Cian Quayle.
No full textInventory for Reverse Journey is the title of a collection of photographic artefacts and found objects, which I have collected over the last twenty years. The title refers to one specific type of artist's journey, which is applicable to the `chronotope' of my archive, as a `metaphorical journey in space and time' (Bakhtin 1981, p. 81). The `city',`provincial town', `road', `threshold' and `interior' are recurrent motifs, which Bakhtin fused together to describe the historical evolution of the novel in relation to its different genres. Bakhtin's motifs are expanded as the basis of an evolutionary nomenclature of the artist's-journey, as a form of spatial mapping and identity formation. Alongside other sources from literature (Alain Robbe-Grillet), cinema (Michelangelo Antonioni), psychoanalysis (Kierkegaard) and critical theory (Walter Benjamin) I have developed a theoretical framework, which initially originated in an empirical process, that is reflected in the antecedents of this project. The research process, as a journey itself, has concretised this approach within a systems-based practice. This is mirrored in the work of the artists under investigation, as their differences and similarities are highlighted within a broad contextual analysis. Accordingly the tone of the writing shifts its register at different points in the thesis.
My journey is just one example of several paradigmatic formations of `travel' as a strategy, which investigates the work of six different artists, as a voluntary or involuntary form of exile. A deskilled use of the photographic image is examined in the work of Ed Ruscha, Douglas Huebler and Bas jan Ader in the spatial mapping of their chosen locations. The work of these artists manifests travel, as a strategy, in a benign form of regional and expatriate exile. The investigation shifts its focus from the New World to Europe, where the work of Jimmie Durham, Gustav Metzger and Kurt Schwitters is analysed in relation to their transformation of found objects and materials, and their relationship with a former 'home'. Their position registers different degrees of the `impossibility of return' to a point of origin, which exists in the mind rather than as a physical location. The transience of their work, and use of disparate materials, is counterbalanced by their physical presence in the work. Conversely Ader, Huebler and Ruscha are linked by a scale of decreasing visibility, as they are sublimated within their work in the formation of, what is now construed as, a unique photographic presence. The starting point for which is a return to the formative years of conceptualism in the 1960's, which set the scene for Durham and Metzger from the 1970's onwards. The spectre of Schwitters practice of forming (Formung) and unforming (Entformung) is significant for my analysis of the dematerialisation of the art-work and artist, by processes of series and repetition, distance and proximity, movement and stasis. Although `travel' is a ubiquitous term, I continue to use it as a portmanteau, which carries with it the themes and `salient' features of a typology of artist's journeys. In a moment of perceived obsolescence as digital information systems engender a culture of `selective-amnesia', these thoughts have informed my work, which runs parallel to the artist case-studies, and the material transformation of the photographic image and found object
High Resolution Laser Spectroscopy of the Electronic Transition of BaS
No full textAuthor Institution: Center for Molecular, Beams and Laser Chemistry., University of WaterlooThe spectrum of BaS was recorded by laser excitation spectroscopy with a single-mode ring dye laser operated in the region of 6200-6500 {\AA}. BaS was produced by reacting Ba metal with CS, in a Broida oven and the laser induced fluorescence was detected with a photomultiplier tube mounted on the oven chamber. Over 15 new vibronic bands were discovered at low resolution and a high resolution analysis of several of these bands will be presented. A few of these bands show evidence of perturbations by other low lying electronic states
"Causes, Consequences and Dynamics of 'Complex' Distributions of Technological Activities: The Case of Prolific Inventors"
No full textWe provide a framework for understanding the causes and consequences of the observed shapes of the distributions of individual inventors' productivities. We review a literature that begins with Lotka's (1926) "law" regarding the persistence of variability in scientific productivity at any point in time and also over time. We discuss use of the "power law" and the Pareto distribution to describe and explain the empirical distributions. We focus on the upper parts of the frequency distributions for inventors exploring the processes underlying knowledge accumulation at the individual level, including its features, characteristics, and structural trends. Finally we explore the specific processes by which these individuals create, maintain, and increase knowledge accumulation as their careers evolve.patents, inventors, prolific, lotka
A Military satellite terminal for S&F: To design and test a nationally owned satellite terminal to perform S&F operations
No full textThe military use of space brings interesting challenges for both technology and operational aspects. The Netherlands armed forces are a small player within the military world. However, in 2013 the beginning of a space program was started by the Royal Netherlands Air Force (RNLAF). One of the key mission statementsstated: “show the military relevance of Nano Satellites". A feasibility study was conducted and the realisation of the first satellite, the BRIK-II,was started. One of the payloads of this satellite is a store and forward system. In this thesis work a systems engineering approach towards, requirements definition, design, verification and testing is provided.Aerospace Engineerin
MILLIMETER WAVE SPECTRUM OF BaS AND SrS IN A LOW PRESSURE FLAME
No full text W. H. Hocking, E. F. Pearson, R. A. Creswell and G. Winnewisser, J. Chem. Phys. 68. 1128-1134 (1978).Author Institution:We reported recently the millimeter wave spectra of BaO, SrO and obtained in a low pressure gas reaction of metal vapour and an oxidant. This method has now been extended to the sulfides. Several improvements in the spectrometer have increased the sensitivity as well as the efficiency of the gas phase reaction. The performance of the present spectrometer configuration and the results obtained for Bas and SrS will be discussed
Nouvelle methode pour apprendre facilement et en peu de temps la langue espagnole.
No full textAuthor from f. A2 verso. De Trigny is a pseudonym of Claude LancelotKopij-impr.Peeters-Fontainas, J. F. Bibliographie des impressions espagnoles des Pays-Bas méridionaux, 667Europeana-GoogleBook
Prophages are associated with extensive, tolerated CRISPR-Cas auto-immunity
No full textCRISPR–Cas systems require discriminating self from non-self DNA during adaptation and interference. Yet, multiple cases have been reported of bacteria containing self-targeting spacers (STS), i.e. CRISPR spacers targeting protospacers on the same genome. STS has been suggested to reflect potential auto-immunity as an unwanted side effect of CRISPR–Cas defense, or a regulatory mechanism for gene expression. Here we investigated the incidence, distribution, and evasion of STS in over 100 000 bacterial genomes. We found STS in all CRISPR–Cas types and in one fifth of all CRISPR-carrying bacteria. Notably, up to 40% of I-B and I-F CRISPR–Cas systems contained STS. We observed that STS-containing genomes almost always carry a prophage and that STS map to prophage regions in more than half of the cases. Despite carrying STS, genetic deterioration of CRISPR–Cas systems appears to be rare, suggesting a level of escape from the potentially deleterious effects of STS by other mechanisms such as anti-CRISPR proteins and CRISPR target mutations. We propose a scenario where it is common to acquire an STS against a prophage, and this may trigger more extensive STS buildup by primed spacer acquisition in type I systems, without detrimental autoimmunity effects as mechanisms of auto-immunity evasion create tolerance to STS-targeted prophages
The impact of labor market regulations
No full textThe authors investigate the impact of labor market regulations in settings where compliance is incomplete. They review some stylized facts about labor market behavior, present an analytical model that may explain such behavior, and provide a checklist for assessing the distortionary impact of a regulation such as the minimum wage. They take as their starting point the limited evidence about the distortionary effects of such regulations and argue that there may be natural limits on the efficiency losses engendered by labor market regulations. First, the regulations may not be binding at market equilibrium. For example, minimum wages may be set so low that they are ineffective. Second, even if they are binding, the relevant elasticities of supply and demand may be so low that the regulations have little impact on efficiency. Third, even if the regulations are binding and elasticities are sizable, compliance may be low. The authors argue that the likelihood of compliance will be greatest when the regulations are binding and the relevant elasticities are sizable. That is, if the distortionary costs of regulations are not rendered insignificant by the first two reasons, then the returns to noncompliance will be high and, other things being equal, employers will evade or avoid the regulations, thereby minimizing the imact on efficiency. The argument rests on profit maximization subject to a hard budget constraint. Public enterprises, which are not concerned only with profit maximization and often have softer budget constraints than the private sector, may be more willing to conform to profit-reducing regulations, but in this case the authors argue that compliance may reduce already-existing efficiency losses.Environmental Economics&Policies,Health Monitoring&Evaluation,Labor Policies,Public Health Promotion,Banks&Banking Reform,Health Monitoring&Evaluation,Banks&Banking Reform,Municipal Financial Management,Poverty Assessment,Environmental Economics&Policies
Damage detection in semiconductor devices by non-linear elastic wave spectroscopy
No full textSemiconductor devices can be found everywhere in our daily lives, for example in self-driving cars, bank cards and personal devices such as smart phones or notebooks. Once part of these personal devices, one does not want them to show failure. Although reliability of such devices is taken into account in the design, the fabrication process might lead to the emergence of small damages in the product. Since these damages or their propagation might cause failure of the device, a series of visual inspections and functional tests is part of the fabrication process. The obtained resolution by optical microscopy, currently the state of the art inspection method, is not sufficient for the detection of small damages such as microcracks or damages located inside a sample. To keep improving the reliability of semiconductor devices, these damages need to be detected in another high speed, low cost way.As semiconductor devices shrink in size, their natural vibration frequencies increase and approach theMHz-range. Vibration based damage detection methods might therefore offer an alternative high speed in-situ inspection method. The main goal of this thesis is to identify and experimentally verify vibration characteristics that indicate the presence of damage, with a focus on microcracks, in semiconductor devices. While linear vibration based damage methods have proven to be insensitive to small damages such as microcracks, non-linear vibration based damage detection methods show much higher sensitivities to this type of damage. The non-linear elastic wave spectroscopy (NEWS) of several damaged materials have shown two characteristic phenomena: amplitude dependent natural frequency shifts and the generation of higher harmonics. Both are explained by a phenomenological non-linear hysteric elastic model. While the applicability of NEWS is proven for several materials, its performance for silicon, in particular at microscale, is still unknown.Mechanical Engineering | Micro and Nano Engineerin
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