806,327 research outputs found
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Power scaling of Tm:YLF-pumped Ho:YAG lasers
No full textReported in this thesis are methodologies for power-scaling Ho:YAG lasers for both the continuous-wave (CW) and Q-switched regime. Advancement in Ho:YAG laser power is made possible through the improvements in output power of the Tm:YLF pump lasers. The slab geometry provides good thermal management characteristics which helps to overcome the limitations set by the thermally-induced stress fracture when scaling output power of Tm:YLF lasers. In conjunction with the use of novel holmium cavity designs that allow the use of slab pump lasers, high-power Ho:YAG lasers are realised.Conflicting requirements on the thulium doping concentration in Tm:YLF provided motivation for the preliminary experiments of laser performance characterisation to find the optimum doping concentration. The optimum doping concentration is defined as that which gives the highest output power before fracture. These experiments show that 2 at.% is the optimum thulium doping concentration, which is then used with the slab geometry to demonstrate 100 W of high M2 thulium output.Two different Ho:YAG cavity designs are detailed that make use of the power-scaled Tm:YLF slab pump lasers. An intra-cavity side-pumping scheme involves the Tm:YLF slab laser side-pumping a Ho:YAG slab laser within its own cavity. This simple and compact resonator design allows efficient operation of the holmium laser. An output power of 13 W was obtained at an incident diode power of 200 W with an M2 of 140 x 1.7. The slope efficiency was nearly 16 % with respect to the diode incident power, with a lasing wavelength of 2097 nm. The second cavity design used for the Ho:YAG laser is an external end-pumping arrangement. A pump-guiding rod was employed in order to minimise the pump size, and thus threshold, and allow the use of spatially multiplexed pump lasers. A maximum output power of 38 W was achieved at an incident thulium pump power of ∼70 W with an M2 of 18.3 x 3.3. The slope efficiency was 61 % with respect to the thulium incident power, and the lasing wavelength was 2090 nm. Pulse energies as high as 14 mJ were achieved when Q-switched at 20 Hz, with a pulse duration of 17 ns. Further future improvements in output power and beam quality are also discussed
Mapping the Discipline of the Olympic Games An Author-Cocitation Analysis
No full textThe authors conducted an author cocitation analysis on prominent authors writing about the Olympics during the 1990s. Author cocitation is an established bibliometric technique that can be used to measure the relative similarities of topics written about by the cited authors. This enables a visual representation of the “intellectual space” of the discipline, in this case the Olympics, to be created for the period under review. So core and peripheral research areas are identified, along with their major contributors. The representation appears as a two-dimensional cluster-enhanced map. Subject expertise was then applied to the results to place labels on the generated clusters of authors and their topics
Enquête Open Access HES-SO ::valeurs et pratiques
No full textL’enquête porte sur les valeurs et les pratiques de l’Open Access au sein de la HES-SO. 314 personnes de tous les domaines de recherche de la HES-SO y ont répondu. Les résultats de l’enquête doivent permettre d’ajuster la mise en œuvre de la stratégie Open Access de l’institution au plus proche des réalités du terrain. Ce rapport dessine les chantiers à venir: renforcer le support aux chercheur-euse-s et les incitations à publier ; prévoir des budgets pour les APC’s et BPC’s ; engager des réflexions de fond sur l’évaluation de la recherche ; développer l’archive institutionnelle ArODES ; et créer des synergies entre les différentes écoles
Designing nanophotonic structures using conditional-deep convolutional generative adversarial network
No full text1
Automatic model-based 3D object recognition by combining feature matching with tracking
No full textWe propose a vision-based robust automatic 3D object recognition, which provides object identification and 3D pose information by combining feature matching with tracking. For object identification, we propose a robust visual feature and a probabilistic voting scheme. An initial object pose is estimated using correlations between the model image and the 3D CAD model, which are predefined, and the homography, byproduct of the identification. In tracking, a Lie group formalism is used for robust and fast motion computation. Experimental results show that object recognition by the proposed method improves the recognition range considerably.This research has been supported by the Korean
Ministry of Science and Technology for National Research Laboratory
Program (Grant number M1-0302-00-0064)
The Worldview and the Author´s (Self)Reflection in Czech Contemporary Historiography
No full textCílem studie je představit možnosti, jak na základě publikovaných autorských textů zkoumat světový názor historiků a historiček, zejména v oboru soudobých dějin, kde lze předpokládat vliv jejich hodnotového horizontu na interpretaci relativně nedávné minulosti. Autor nejprve vymezuje pojetí světového názoru vzhledem ke stanovenému záměru a zdůvodňuje analytické užití tohoto pojmu v historiografickém textu, v daném kontextu se také zamýšlí nad vztahem paměti, dějin a historiografie. Konstatuje, že poměrně málo českých historiků a historiček dosud reflektuje vztah (individuální či kolektivní) paměti a práce dějepisce, zvláště s ohledem na jeho pozici v současné společnosti, která bývá často redukována na roli objektivního „objevitele historické pravdy“. Taková (sebe)reflexe předpokládá přiznání vlivu individuálního světového názoru historika (komplexu názorů a postojů formovaných výchovou, vzděláním, vzpomínkami, generační příslušností a podobně) na jeho vědeckou činnost. Autor studie nabízí dvě možné a vzájemně se doplňující cesty k poznání historikova světového názoru: jednak prostřednictvím vlastních svědectví a prohlášení z jeho osobněji laděných textů a egodokumentů (eseje, rozhovory, vzpomínky, příspěvky na sociálních sítích), jednak analýzou jeho vědeckých textů (časopiseckých studií, knižních monografií, recenzí). Oba přístupy autor dokumentuje na konkrétních příkladech z produkce historiků a historiček českých soudobých dějin. V závěru studie pak nastiňuje cíle a smysl zkoumání historikova světového názoru.The aim of this study is to present the opportunities for research into the worldview of historians, especially historians focused on contemporary history, where it can be assumed that their set of values may influence their interpretation of the rela-tively recent past. The author first defines the notion of worldview and justifies the analytical use of this concept in historiographical texts. He also considers the relationship between memory, history and historiography in the given context. The author states that not many Czech historians have so far reflected on the relationship between (individual and collective) memory and the work of the historian, especially with regard to his or her position in contemporary society, which is often reduced to the role of an objective “discoverer of historical truth”. Such (self)reflection presupposes the acknowledgement of the influence of the historian’s individual worldview (a complex of opinions and attitudes shaped by upbringing, education, memories, generational affiliation and so on) on his or her scholarly activity. The author of the study offers two possible and complementary ways to learn about the historian’s worldview: first, through his or her own testimonies and statements from more personal texts and ego-documents (essays, interviews, memoirs or social me-dia posts), and second, through the analysis of his or her scholarly texts (journal studies, monographs and book reviews). The author demonstrates both approaches with concrete examples of works by historians of Czech contemporary history and concludes by outlining the aims and purpose of examining the historian’s worldview. © 2022, Institute of Contemporary History of the Czech Academy of Sciences. All rights reserved
Robust model-based scene interpretation by multilayered context information
No full textIn this paper, we present a new graph-based frame work for collaborative place, object, and part recognition in indoor environments. We consider a scene to be an undirected graphical model composed of a place node, object nodes, and part nodes with undirected links. Our key contribution is the introduction of collaborative place and object recognition (we call it as the hierarchical context in this paper) instead of object only or causal relation of place to objects. We unify the hierarchical context and the well-known spatial context into a complete hierarchical graphical model (HGM). In the HGM, object and part nodes contain labels and related pose information instead of only a label for robust inference of objects. The most difficult problems of the HGM are learning and inferring variable graph structures. We learn the HGM in a piecewise manner instead of by joint graph learning for tractability. Since the inference includes variable structure estimation with marginal distribution of each node, we approximate the pseudo-likelihood of marginal distribution using multimodal sequential Monte Carlo with weights updated by belief propagation. Data-driven multimodal hypothesis and context-based pruning provide the correct inference. For successful recognition, issues related to 3D object recognition are also considered and several state-of-the-art methods are incorporated. The proposed system greatly reduces false alarms using the spatial and hierarchical contexts. We demonstrate the feasibility of the HGM-based collaborative place, object, and part recognition in actual large-scale environments for guidance applications (12 places, 112 3D objects). (c) 2006 Elsevier Inc. All rights reserved.This research was partially supported by the Korean
Ministry of Science and Technology for National Research
Laboratory Program (Grant No. M1-0302-00-0064), by MIC & IITA through the Korean IT leading R&D
support program, and by Microsoft Research Asia
3D target recognition using cooperative feature map binding under Markov Chain Monte Carlo
No full textA robust and effective feature map integration method is presented for infrared (IR) target recognition. Noise in an IR image makes a target recognition system unstable in pose estimation and shape matching. A cooperative feature map binding under computational Gestalt theory shows robust shape matching properties in noisy conditions. The pose of a 3D target is estimated using a Markov Chain Monte Carlo (MCMC) method, a statistical global optimization tool where noise-robust shape matching is used. In addition, bottom-up information accelerates the recognition of 3D targets by providing initial values to the MCMC scheme. Experimental results show that cooperative feature map binding by analyzing spatial relationships has a crucial role in robust shape matching, which is statistically optimized using the MCMC framework. (c) 2005 Elsevier B.V. All rights reserved.This research was supported by the Korean Ministry of
Science and Technology for National Research Laboratory
Program (Grant number M1-0302-00-0064), Korea
Biologically motivated perceptual feature: Generalized robust invariant feature
No full textIn this paper, we present a new, biologically inspired perceptual feature to solve the selectivity and invariance issue in object recognition. Based on the recent findings in neuronal and cognitive mechanisms in human visual systems, we develop a computationally efficient model. An effective form of a visual part detector combines a radial symmetry detector with a corner-like structure detector. A general context descriptor encodes edge orientation, edge density, and hue information using a localized receptive field histogram. We compare the proposed perceptual feature (C-RIF: generalized robust invariant feature) with the state-of-the-art feature, SIFT, for feature-based object recognition. The experimental results validate the robustness of the proposed perceptual feature in object recognition
- …
