143 research outputs found
Performing Arts Across the Continents: Our Way to Digital Humanities and Arts
One of the strategic projects initiated in Europe in the period 2011-2014 was the project DARIAH-EU which had the main goal to elevate research in Humanities and Arts science using digital technologies and create special infrastructure across Europe. Czech Republic is in the phase of joining this infrastructure. Digital Humanity is a new scientific discipline which appeared in the last decade in many universities over the world and spread into many directions. We joined this activity in the field of performing arts. Our objective was to verify whether modern computer network and audio-visual technologies can enable collaborative work of performing artists when they are distributed across large distances and what are the requirements and limitations. We will describe our experience from the events which we organized or on which we participated during the last 4 years in Europe, US, Malaysia, Korea and Taiwan. The experiments showed that Global Performances as new form of performing arts can be arranged for different type of artists. The GP bring new very interesting impressions for artists and for the spectators. We demonstrated that GP can be used for presentation of performing arts on the festivals, cultural exhibitions and fairs. We believe that, It could have very positive economic effect. It is our IT contribution to Digital Humanities and Arts.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</p
Performing Arts Across the Continents: Our Way to Digital Humanities and Arts
One of the strategic projects initiated in Europe in the period 2011-2014 was the project DARIAH-EU which had the main goal to elevate research in Humanities and Arts science using digital technologies and create special infrastructure across Europe. Czech Republic is in the phase of joining this infrastructure. Digital Humanity is a new scientific discipline which appeared in the last decade in many universities over the world and spread into many directions. We joined this activity in the field of performing arts. Our objective was to verify whether modern computer network and audio-visual technologies can enable collaborative work of performing artists when they are distributed across large distances and what are the requirements and limitations. We will describe our experience from the events which we organized or on which we participated during the last 4 years in Europe, US, Malaysia, Korea and Taiwan. The experiments showed that Global Performances as new form of performing arts can be arranged for different type of artists. The GP bring new very interesting impressions for artists and for the spectators. We demonstrated that GP can be used for presentation of performing arts on the festivals, cultural exhibitions and fairs. We believe that, It could have very positive economic effect. It is our IT contribution to Digital Humanities and Arts.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</p
Methods and design issues for next generation network-aware applications
Networks are becoming an essential component of modern cyberinfrastructure and this work describes methods of designing distributed applications for high-speed networks to improve application scalability, performance and capabilities. As the amount of data generated by scientific applications continues to grow, to be able to handle and process it, applications should be designed to use parallel, distributed resources and high-speed networks. For scalable application design developers should move away from the current component-based approach and implement instead an integrated, non-layered architecture where applications can use specialized low-level interfaces. The main focus of this research is on interactive, collaborative visualization of large datasets. This work describes how a visualization application can be improved through using distributed resources and high-speed network links to interactively visualize tens of gigabytes of data and handle terabyte datasets while maintaining high quality. The application supports interactive frame rates, high resolution, collaborative visualization and sustains remote I/O bandwidths of several Gbps (up to 30 times faster than local I/O). Motivated by the distributed visualization application, this work also researches remote data access systems. Because wide-area networks may have a high latency, the remote I/O system uses an architecture that effectively hides latency. Five remote data access architectures are analyzed and the results show that an architecture that combines bulk and pipeline processing is the best solution for high-throughput remote data access. The resulting system, also supporting high-speed transport protocols and configurable remote operations, is up to 400 times faster than a comparable existing remote data access system. Transport protocols are compared to understand which protocol can best utilize high-speed network connections, concluding that a rate-based protocol is the best solution, being 8 times faster than standard TCP. An HD-based remote teaching application experiment is conducted, illustrating the potential of network-aware applications in a production environment. Future research areas are presented, with emphasis on network-aware optimization, execution and deployment scenarios
Introducing Experimental Stereoscopic into Networked Live Performance with Very Limited System Resources
Stereoscopic and its wide application are recently getting popular. In thispaper, we examine potential limitations that might hinder the direct introduction ofstereoscopic into networked live performance. This paper also suggests a plausibleexample of simple and general configuration that supports stereoscopic networked liveperformance with very limited system resources. As a result, experiment quality ofstereoscopic networked performance was acquired with minimal resources by usingthe anaglyph method
EXPERIMENTS ON VIDEO STREAMING OVER COMPUTER NETWORKS
Video traffic (including streaming video service) is dominating the Internet traffic today. Video can be streamed using a dedicated server, a content delivery network (CDN), or peer-to-peer (P2P) overlays across a network. Video can be transmitted in multiple formats and at different resolutions. Video is also being distributed to a variety of devices (fixed and mobile)
Are tiled display walls needed for astronomy?
Clustering commodity displays into a Tiled Display Wall (TDW) provides a
cost-effective way to create an extremely high resolution display, capable of
approaching the image sizes now gen- erated by modern astronomical instruments.
Astronomers face the challenge of inspecting single large images, many similar
images simultaneously, and heterogeneous but related content. Many research
institutions have constructed TDWs on the basis that they will improve the
scientific outcomes of astronomical imagery. We test this concept by presenting
sample images to astronomers and non- astronomers using a standard desktop
display (SDD) and a TDW. These samples include standard English words, wide
field galaxy surveys and nebulae mosaics from the Hubble telescope. These
experiments show that TDWs provide a better environment for searching for small
targets in large images than SDDs. It also shows that astronomers tend to be
better at searching images for targets than non-astronomers, both groups are
generally better when employing physical navigation as opposed to virtual
navigation, and that the combination of two non-astronomers using a TDW rivals
the experience of a single astronomer. However, there is also a large
distribution in aptitude amongst the participants and the nature of the content
also plays a significant role is success.Comment: 19 pages, 15 figures, accepted for publication in PASA (Publications
of the Astronomical Society of Australia
High Bit Rate Wireless and Fiber-Based Terahertz Communication
RĂSUMĂ
Dans le spectre Ă©lectromagnĂ©tique, la bande des tĂ©rahertz sâĂ©tend de 100 GHz Ă 10 THz (longueurs dâonde de 3 mm Ă 30 ÎŒm). Des dĂ©cennies auparavant, le spectre des THz Ă©tait connu sous le nom de « gap tĂ©rahertz » en raison de lâindisponibilitĂ© de sources et dĂ©tecteurs efficaces Ă ces frĂ©quences. Depuis quelques annĂ©es, la science a Ă©voluĂ© pour faire migrer la technologie THz des laboratoires aux produits commerciaux. Il existe plusieurs applications des ondes THz en imagerie, spectroscopie et communications. Dans cette thĂšse, nous nous intĂ©ressons aux communications THz Ă travers deux objectifs. Le premier objectif est de dĂ©velopper une source THz de haute performance dĂ©diĂ©e aux communications et basĂ©e sur les technologies optiques avec des produits commerciaux uniquement. Le second objectif est de dĂ©montrer lâutilisation de fibres optiques afin de renforcer la robustesse des communications THz sans fil.
Nous dĂ©butons cette thĂšse avec une revue de la littĂ©rature scientifique sur le sujet de la communications THz sans fil et filaire. Dâabord, nous discutons des deux mĂ©thodes communĂ©ment utilisĂ©es (Ă©lectronique et optique) pour dĂ©montrer des liens de communications THz avec leurs avantages et inconvĂ©nients. Nous prĂ©sentons par la suite la possibilitĂ© dâutiliser un systĂšme de spectroscopie THz pour des applications en communications avec des modifications mineures au montage. Nous prĂ©sentons ensuite plusieurs applications gourmandes en bande passante qui pourraient bĂ©nĂ©ficier du spectre THz, incluant la diffusion en continu (streaming) de flux vidĂ©o aux rĂ©solutions HD et 4K non compressĂ©s. Ensuite, nous discutons de la motivation dâutiliser de longues fibres THz et notamment du fait quâelles ne sont pas destinĂ©es Ă remplacer les fibres optiques conventionnelles de lâinfrarouge, mais plutĂŽt Ă augmenter la robustesse des liens THz sans fil. En particulier, les fibres THz peuvent ĂȘtre utilisĂ©es pour garantir le lien de communication dans des environnements gĂ©omĂ©triques complexes ou difficile Ă atteindre, ainsi que pour immuniser le lien THz aux attaques de sĂ©curitĂ©. Plusieurs designs de fibres et guides dâonde prĂ©cĂ©demment dĂ©montrĂ©es dans la littĂ©rature sont discutĂ©s avec, entre autres, leurs mĂ©thodes de fabrication respectives. Nous discutons ensuite de la possibilitĂ© dâutiliser un simple guide dâonde diĂ©lectrique et sous-longueur dâonde pour transmettre lâinformation Ă un dĂ©bit de lâordre de plusieurs Gbps sur une distance de quelques mĂštres.----------ABSTRACT
The Terahertz (THz) spectral range spans from 100 GHz to 10 THz (wavelength: 3 mm to 30 ÎŒm) in the electromagnetic spectrum. Decades ago, the THz spectral range is often named as âTHz gapâ due to the non-availability of efficient THz sources and detectors. In the recent years, the science has evolved in bringing the THz technology from lab scale to commercial products. There are several potential applications of THz frequency band such as imaging, spectroscopy and communication. In this thesis, we focus on THz communications by addressing two objectives. The first objective is to develop a high-performance photonics-based THz communication system using all commercially available components. The second objective is to demonstrate the THz-fiber based communications, which can be used to increase the reliability of THz wireless links.
We begin this thesis with a scientific literature review on the subject of THz wireless and fiber-based communications. First, the two different methodologies (all electronics based and photonics-based THz system) that is commonly used in the demonstration of THz communications is discussed along with their advantages and challenges. We then present the flexibility of photonics-based THz system where it is possible to switch it with minor modifications for THz spectroscopic studies and THz communication applications. Several bandwidth hungry applications that demands the use of THz spectrum for next generation communications is detailed. This includes the streaming of uncompressed HD/4K and beyond high-resolution videos, where the THz spectrum can be beneficial. Next, the motivation of using long THz fibers is discussed and we convince the readers that the THz fibers are not meant to replace the fibers in the optical-infrared region but to increase the reliability of THz wireless links. Particularly, the THz fibers can be used to provide connectivity in complex geometrical environments, secure communications and signal delivery to hard-to-reach areas. Several novel fiber/waveguide designs along with their fabrication technologies from the literature are presented. We then show that a simple solid core dielectric subwavelength fiber can be used to transmit the information in the order of several Gbps to a distance of a few meters
Control and systems software for the Cosmology Large Angular Scale Surveyor (CLASS)
The Cosmology Large Angular Scale Surveyor (CLASS) is an array of
polarization-sensitive millimeter wave telescopes that observes ~70% of the sky
at frequency bands centered near 40GHz, 90GHz, 150GHz, and 220GHz from the
Atacama desert of northern Chile. Here, we describe the architecture of the
software used to control the telescopes, acquire data from the various
instruments, schedule observations, monitor the status of the instruments and
observations, create archival data packages, and transfer data packages to
North America for analysis. The computer and network architecture of the CLASS
observing site is also briefly discussed. This software and architecture has
been in use since 2016, operating the telescopes day and night throughout the
year, and has proven successful in fulfilling its design goals.Comment: 19 pages, 8 figures, to appear in Proc. SPI
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