Relevant bibliographies by topics / Capacity Spectrum

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Capacity Spectrum'

Author: Grafiati
Published: 2 June 2025
Last updated: 7 July 2025

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Journal articles on the topic "Capacity Spectrum"

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Lee, Jemin, Jeffrey G. Andrews, and Daesik Hong. "Spectrum-Sharing Transmission Capacity." IEEE Transactions on Wireless Communications 10, no. 9 (2011): 3053–63. http://dx.doi.org/10.1109/twc.2011.070511.101941.

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Kasper, Judith D., Kitty S. Chan, and Vicki A. Freedman. "Measuring Physical Capacity." Journal of Aging and Health 29, no. 2 (2016): 289–309. http://dx.doi.org/10.1177/0898264316635566.

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Objective: The objective of this study was to develop and assess a composite measure of physical capacity using self-report and physical performance items. Method: Item response theory (IRT) is used to evaluate measurement properties of self-report and performance items and to develop a composite measure for 7,609 participants in the National Health and Aging Trends Study. Results: Self-reports distinguish differences at the lower end of physical capacity but not at mid-to-high levels. Performance-based measures discriminate across a fuller spectrum. An IRT-based composite score, drawing on both, provides increased measurement precision across the physical capacity spectrum and detects age group differences if either self-report or performance does so—suggesting it is better suited for studying age-related changes than either measure alone. Discussion: Self-report and performance measures have different strengths on the physical capacity spectrum. IRT provides a means of combining these different measurement approaches for analyses of physical capacity across a broad range of functioning in later life.
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Cho, Sung Gook, Woong Ki Park, and Yang Hee Joe. "Effects of Inelastic Demand Spectrum on Seismic Capacity Evaluation of Curved Bridge by Capacity Spectrum Method." Journal of the Korea institute for structural maintenance and inspection 15, no. 3 (2011): 195–206. http://dx.doi.org/10.11112/jksmi.2011.15.3.195.

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Lee, Jemin, Jeffrey G. Andrews, and Daesik Hong. "Spectrum-Sharing Transmission Capacity with Interference Cancellation." IEEE Transactions on Communications 61, no. 1 (2013): 76–86. http://dx.doi.org/10.1109/tcomm.2012.100512.110347.

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Hwang, Chia Lin, and San-qi Li. "Link capacity allocation by input power spectrum." Telecommunication Systems 4, no. 1 (1995): 353–63. http://dx.doi.org/10.1007/bf02110094.

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Yousefvand, Mohammad, Nirwan Ansari, and Siavash Khorsandi. "Maximizing Network Capacity of Cognitive Radio Networks by Capacity-Aware Spectrum Allocation." IEEE Transactions on Wireless Communications 14, no. 9 (2015): 5058–67. http://dx.doi.org/10.1109/twc.2015.2431691.

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Foukalas, Fotis, and George T. Karetsos. "Joint power control and spectrum sensing for capacity maximisation in spectrum sharing systems." International Journal of Electronics 100, no. 3 (2013): 302–11. http://dx.doi.org/10.1080/00207217.2012.710877.

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Yang, Yuli. "Effective Capacity of a Novel Spectrum-Band Selection Scheme in Spectrum-Sharing Networks." IEEE Transactions on Vehicular Technology 66, no. 3 (2017): 2838–43. http://dx.doi.org/10.1109/tvt.2016.2577540.

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Zhang, Jing, Duixian Gao, and Zhiwei Chen. "The Equivalent Damping Ration in Capacity Spectrum Method." Advanced Materials Research 163-167 (December 2010): 4290–94. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.4290.

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Study the calculation method of equivalent damping ratio in Capacity Spectrum Method. Analyzing the feature of several methods for the calculation of equivalent damping ratio in the world, from the numeral example, the numeral results of several calculation methods of equivalent damping ratio are compared to the results of time course method. The follow conclusions are reached: Secant stiffness method overestimate the value of equivalent damping ratio for steel structure, therefore, underestimate the supreme seismic reaction. The level of underestimate is interrelate to yield still coefficient; Under the medium earthquakes effect, all the method can fairly good forecast the supreme seismic reaction; But Under the large earthquakes effect, only the Kwan (EP) method can give the best result. The conclusions has impotent value for the perfect of Performance-Based Seismic Design Methods.
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Madfors, M., K. Wallstedt, S. Magnusson, H. Olofsson, P. O. Backman, and S. Engstrom. "High capacity with limited spectrum in cellular systems." IEEE Communications Magazine 35, no. 8 (1997): 38–45. http://dx.doi.org/10.1109/35.606027.

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Dissertations / Theses on the topic "Capacity Spectrum"

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Pearce, David Andrew James. "Improving spectrum efficiency in fixed cellular communication systems." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341520.

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Mowbray, Robert Stephen. "Interference and multipath cancellation for increased subscriber capacity in spread spectrum communication systems." Thesis, Edinburgh Napier University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386003.

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Jiang, Hai. "Coverage vs. capacity analysis for CDMA cellular networks /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074412.

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Van, Den Biggelaar Olivier. "Distributed spectrum sensing and interference management for cognitive radios with low capacity control channels." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209612.

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Cognitive radios have been proposed as a new technology to counteract the spectrum scarcity issue and increase the spectral efficiency. In cognitive radios, the sparse assigned frequency bands are opened to secondary users, provided that interference induced on the primary licensees is negligible. Cognitive radios are established in two steps: the radios firstly sense the available frequency bands by detecting the presence of primary users and secondly communicate using the bands that have been identified as not in use by the primary users.<p><p>In this thesis we investigate how to improve the efficiency of cognitive radio networks when multiple cognitive radios cooperate to sense the spectrum or control their interferences. A major challenge in the design of cooperating devices lays in the need for exchange of information between these devices. Therefore, in this thesis we identify three specific types of control information exchange whose efficiency can be improved. Specifically, we first study how cognitive radios can efficiently exchange sensing information with a coordinator node when the reporting channels are noisy. Then, we propose distributed learning algorithms allowing to allocate the primary network sensing times and the secondary transmission powers within the secondary network. Both distributed allocation algorithms minimize the need for information exchange compared to centralized allocation algorithms.<br>Doctorat en Sciences de l'ingénieur<br>info:eu-repo/semantics/nonPublished
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Obregon, Evanny. "On the Deployment of Large-Scale High-Capacity Wireless Systems with Secondary Spectrum Access." Doctoral thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144861.

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The avalanche in mobile data consumption represents a big challenge for mobile networks operators and national regulators. This thesis focuses on finding additional spectrum to meet this demand in a cost-efficient way by considering shared spectrum access. Our studies aim at identifying key factors in achieving large-scale business success,quantifying the spectrum availability and identifying suitable regulatory/sharing polices for large-scale secondary access in the aeronautical and radar bands. This thesis proposes a research methodology, that considers business, technical and regulatory aspects involved in assessing commercial viability of large-scale deployment of wireless networks, employing vertical spectrum sharing in the aeronautical and radar bands. We pinpoint the following criteria which are critical in ensuring business success:spectrum availability, radio technology availability, low-cost end-userdevices, system scalability and quality of service. Our investigation centers on the technical aspects of these criteria, and thus deals mainly with the assessment of spectrum availability. The availability of spectrum opportunities is found to be ample for adjacent channel usage despite the strict requirements of the radar receiver. However, it is alsovery location-dependent and mostly non-contiguous.Finally, with regard to the regulatory aspects, our results show thatapplying regulatory policies, especially to the deployment of secondary users, can boost availability in cities or urban areas where the capacity demand is high. In addition, Licensed Shared Access (LSA) is identified as a suitable regulatory framework to meet tough protection criteria ofthe radar receivers and to apply the selected regulatory policies to improve exploitation of sharing opportunities. Based on our results and analysis, we conclude that there is a significant amount of spectrum opportunities for large-scale secondary access in the aeronautical and radar bands from the technical point of view. However, the commercial viability of secondary spectrum access is still undetermined giventhe remaining uncertainties regarding its total cost and the exact time needed for relevant technology to become available. Moreover, thereis no single answer to the commercial viability since it will most likelydepend on the country or region in question, which affects the spectrum availability, which in turn is a key criterion for business success. Futurework should therefore strive to clarify these uncertainties and to identify new responsibilities for all the entities involved in the LSA framework. Moreover, a quantitative evaluation would be needed to obtain more explicit conclusions on the business viability.<br><p>QC 20140519</p>
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Schumacher, R. "Improving the capacity of radio spectrum : exploration of the acyclic orientations of a graph." Thesis, City, University of London, 2017. http://openaccess.city.ac.uk/17910/.

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The efficient use of radio spectrum depends upon frequency assignment within a telecommunications network. The solution space of the frequency assignment problem is best described by the acyclic orientations of the network. An acyclic orientation Ɵ of a graph (network) G is an orientation of the edges of the graph which does not create any directed cycles. We are primarily interested in how many ways this is possible for a given graph, which is the count of the number of acyclic orientations, a(G). This is just the evaluation of the chromatic polynomial of the graph χ(G; λ) at λ = -1. Calculating (and even approximating) the chromatic polynomial is known to be #P-hard, but it is unknown whether or not the approximation at the value -1 is. There are two key contributions in this thesis. Firstly, we obtain computational results for all graphs with up to 8 vertices. We use the data to make observations on the structure of minimal and maximal graphs, by which we mean graphs with the fewest and greatest number of acyclic orientations respectively, as well as on the distribution of acyclic orientations. Many conjectures on the structure of extremal graphs arise, of which we prove some in the theoretical part of the thesis. Secondly, we present a compression move which is monotonic with respect to the number of acyclic orientations, and with respect to various other parameters in particular cliques. This move gives us a new approach to classifying all minimal graphs. It also enables us to tackle the harder problem of identifying maximal graphs. We show that certain Turán graphs are uniquely maximal (Turán graphs are complete multipartite graphs with all vertex classes as equal as possible), and conjecture that all Turán graphs are maximal. In addition we derive an explicit formula for the number of acyclic orientations of complete bipartite graphs.
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Sirsat, Sarah Goy. "Maturation of Endothermic Capacity within the Avian Developmental Spectrum: A Characterization of Thermoregulatory Metamorphosis." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc862809/.

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An avian embryo is ectothermic, with body temperature determined by environmental temperature. Upon hatching, the neonate begins a conversion so that endothermic capacity becomes feasible and body temperature becomes independent of environment. Whole animal metabolic rate and ventilation response, cardiovascular development, and maturation of muscle mitochondrial flux were the focus of this dissertation because of the direct role in shivering thermogenesis. Precocial ducks and altricial Double-crested Cormorants exhibit increasing hematocrit and disproportionate increases in fractional heart mass resulting in greater oxygen delivery capacity and increased capacity of muscles to utilize oxygen compared with ectothermic American Alligator and Common Snapping turtles. By selecting for faster growth and higher meat yield in the domestic chicken, differences in whole-animal, tissue, cellular, and regulatory responses are evident between broiler and layer type birds. In the altricial red-winged blackbird, despite appearance of a whole animal endothermic response sometime after 7 dph, capacity of skeletal muscles involved in shivering thermogenesis peaks prior to that time. Thus, full development of endothermy is delayed in this species, allowing the altricial nestling to allocate energy towards growth rather than metabolic maintenance. Hypothyroidism in neonate red-winged blackbirds results in delayed maturation of the cardiovascular system and mitochondrial oxidative capacity of skeletal muscle. Such deficiencies were quickly recovered once the animals returned to a normothyroid state, apparently at the cost of increasing body mass. Insights into onset of thermoregulation provide a more thorough understanding of metabolic and physical transitions a hatchling bird must undergo to reach the adult endothermic phenotype. Endothermic capacity will continue to be at the forefront of physiological research because of the significance of changes between the energetic relations of an animal that must occur with its environment.
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Ahsan, Umair. "On the Scalability of Ad Hoc Dynamic Spectrum Access Networks." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/45211.

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Dynamic Spectrum Access allows wireless users to access a wide range of spectrum which increases a nodeâ s ability to communicate with its neighbors, and spectral efficiency through opportunistic access to licensed bands. Our study focuses on the scalability of network performance, which we define in terms of network transport capacity and end-to-end throughput per node, as the network density increases. We develop an analytical procedure for performance evaluation of ad hoc DSA networks using Markov models, and analyze the performance of a DSA network with one transceiver per node and a dedicated control channel. We also develop and integrate a detailed model for energy detection in Poisson networks with sensing. We observe that the network capacity scales sub-linearly with the number of DSA users and the end-to-end throughput diminishes, when the number of data channels is fixed. Nevertheless, we show that DSA can improve network performance by allowing nodes to access more spectrum bands while providing a mechanism for spectrum sharing and maintaining network wide connectivity. We also observe that the percentage of relative overhead at the medium access layer does not scale with the number of users. Lastly, we examine the performance impact of primary user density, detection accuracy, and the number of available data channels. The results help to answer the fundamental question of the scaling behavior of network capacity, end-to-end throughput, and network overhead in ad hoc DSA networks.<br>Master of Science
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Zhou, Pan. "Power control and capacity analysis in cognitive radio networks." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44736.

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The objective of this research is to investigate the power-control problem and analyze the network capacity in cognitive radio (CR) networks. For CR users or Secondary users (SUs), two spectrum-access schemes exist: namely, spectrum underlay and spectrum overlay. Spectrum overlay improves the spectrum utilization by granting SUs the authority to sense and explore the unused spectrum bands provided by PUs. in this scheme, designing effective spectrum-sensing techniques in PHY layer is the major concern. Spectrum underlay permits Sus to share the same spectrum bands with PUS at the same time and location. In this scheme, designing robust power control algorithms that guarantee the QoS of both primary and secondary transmissions is the main task. In this thesis, we first investigate the power-control problems in CR networks. Especially, we conduct two research works on power control for CDMA and OFDMA CR networks. Being aware of the competitive spectrum-access feature of SUs, the non-cooperative game theory, as a standard mathematics, is used to study the power-control problem. Note that game-theoretical approaches provide distributed solutions for CR networks,, which fits the needs of CR networks. However, it requires channel state information (CSI) exchange among all SUs, which will cause great overheads in the large network deployment. To gain better network scalability and design more robust power-control algorithm for any hostile radio-access environments, we propose a reinforcement-learning-based repeated power-control game that solve the problem for the first time. The left part of the dissertation is to study the throughput capacity scaling of the newly arising cognitive ad hoc networks (CRAHNs). Stimulated by the seminal work of Gupta and Kumar, the fundamental throughput scaling law for large-scale wireless ad hoc networks has become an active research topic. This research is of great theoretical value for wireless ad hoc networks. Our proposed research studies it in the scenario of CRAHNs under the impact of PU activity. It is a typical and important network scenario that has never been studied yet. We do believe this research has its unique value, it will have an impact to the research community.
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Kumar, Deepak. "Optimal finite alphabet sources over partial response channels." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1044.

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We present a serially concatenated coding scheme for partial response channels. The encoder consists of an outer irregular LDPC code and an inner matched spectrum trellis code. These codes are shown to offer considerable improvement over the i.i.d. capacity (> 1 dB) of the channel for low rates (approximately 0.1 bits per channel use). We also present a qualitative argument on the optimality of these codes for low rates. We also formulate a performance index for such codes to predict their performance for low rates. The results have been verified via simulations for the (1-D)/sqrt(2) and the (1-D+0.8D^2)/sqrt(2.64) channels. The structure of the encoding/decoding scheme is considerably simpler than the existing scheme to maximize the information rate of encoders over partial response channels.
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Books on the topic "Capacity Spectrum"

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Mayrhofer-Hufnagl, Ingrid, ed. Architecture, Futurability and the Untimely. transcript Verlag, 2022. http://dx.doi.org/10.14361/9783839461112.

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The planetary instantaneity that digital technologies have enabled is leading to an effacement of the divisions that separate the past from the future, ensuring that the present is ubiquitous. While contemporary architecture seems to have lost the capacity to conceive of the past as a transformative force, this book stresses the need to rethink today's complex temporal mechanisms through the notion of the untimely. This concept opens up a whole spectrum of possibilities to go beyond what seems predictable. The contributors to this book employ critical concepts and architectural design tools in order to offer experimental and speculative approaches for unknown futures of architecture.
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Brogi Bercoff, Giovanna, and Maria Grazia Bartolini, eds. Kiev e Leopoli: Il 'testo' culturale. Firenze University Press, 2007. http://dx.doi.org/10.36253/978-88-8453-666-2.

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Kiev has always revealed a surprising capacity for assimilation, giving rise over time to multi-ethnic, multi-faith and multi-cultural contexts of various types. Thinking of the "Kiev text" leads inevitably to consideration of the other emblematic text of the Ukrainian identity, the no less composite reality of Lviv. This publication contains the contributions presented at a Conference (Milan, February 2007) addressed to the "cultural text" of Kiev and Lviv. The authors are specialists with different cultural profiles, and the book is of a deliberately inter-disciplinary character. In view of the richness and variety of the information it is offered, within the Italian and international context, as a useful source even for the non-specialist public, and is one of a very small number of books dedicated to Ukraine available in Italian. Clearly, the arguments addressed represent only a tiny part of the vast spectrum of issues and questions inherent to the specificity and plurality of Kiev and Lviv. The hope is that the seed sewn here will grow into further fruitful interest.
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Edmunds, D. E., and W. D. Evans. Capacity and Compactness Criteria. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198812050.003.0008.

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In this chapter, necessary and sufficient conditions are derived for the Poincaré inequality to hold, for the embedding of W01,p(Ω) in Lp(Ω‎) to be compact, and for a self-adjoint realization of − aijDiDj + q to have a wholly discrete spectrum when q is real and bounded below. The results are proved using a method of Maz’ya.
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McMahon-Coleman, Kimberley, and Kim Draisma. Teaching University Students with Autism Spectrum Disorder: A Guide to Developing Academic Capacity and Proficiency. Kingsley Publishers, Jessica, 2016.

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McMahon-Coleman, Kimberley. Teaching university students with autism spectrum disorder: A guide to developing academic capacity and proficiency. 2016.

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Yang, Hong-Chuan. Introduction to Digital Wireless Communications. Institution of Engineering & Technology, 2017.

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Introduction to Digital Wireless Communications. The Institution of Engineering and Technology, 2017.

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Bouchaud, Jean-Phillipe, and Marc Potters. Asymptotic singular value distributions in information theory. Edited by Gernot Akemann, Jinho Baik, and Philippe Di Francesco. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780198744191.013.41.

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This article examines asymptotic singular value distributions in information theory, with particular emphasis on some of the main applications of random matrices to the capacity of communication channels. Results on the spectrum of random matrices have been adopted in information theory. Furthermore, information theorists, motivated by certain channel models, have obtained a number of new results in random matrix theory (RMT). Most of those results are related to the asymptotic distribution of the (square of) the singular values of certain random matrices that model data communication channels. The article first provides an overview of three transforms that are useful in expressing the asymptotic spectrum results — Stieltjes transform, η-transform, and Shannon transform — before discussing the main results on the limit of the empirical distributions of the eigenvalues of various random matrices of interest in information theory.
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Mott IV, William H., and Robert Sheldon. Laser Satellite Communication. Greenwood Publishing Group, Inc., 2000. http://dx.doi.org/10.5040/9798216186656.

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This introduction to the next generation of human telecommunications enterprise examines the development of laser satellite communications and describes its advantages over previous technologies. It looks at the development of the technology and the industry through wired and wireless media and presents the vision, promise, and challenges of free-space lasers. The book balances its focused consideration of the telecommunications industry and markets with practical thoughts on creating a business involved in the introduction of commercial laser satellite communications systems. Scholars, investors, venture capitalists, policy makers, and corporate leaders will find this to be a comprehensive and eye-opening bridge between the existing telecommunications industry and the opportunities of the next generation. The opening chapters introduce the concepts of Migration, Specialization, and Interconnectivity as solutions inherent in third generation laser-satellite communications. The high capacity of the optical spectrum invites migration of applications beyond the narrow RF spectra to the high frequencies of free-space laser beams. Migration stimulates specialization of voice and duplex at the lower, optimal RF spectra. The third generation—laser-wired space—focuses around global satellite interconnectivity between fiber optics and RF. The final chapters introduce a model business concept to pioneer the third generation. Several approaches to capitalization, organization, technology development, and business strategies provide an exciting stimulus for pragmatic approaches to commercial concepts.
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Straayer, Chris. Femme Fatale or Lesbian Femme. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252036613.003.0016.

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This chapter analyzes the neo-noir Bound (1996). It shows how the splitting of sex from gender liberates generic conventions in the service of protagonists who, enacting a lesbian romance in film noir, avail themselves of generic formulas to double-cross the villains. Analyzing the creative capacity of noir gender “to turn cartwheels on both male and female characters within a system of sexual difference,” the chapter shows how Bound—self-consciously playing on the debated identities of butch, femme, and feminine—generates different-sex erotics through same-gender protagonists. Through such playful manipulations, the film opens up flexible reimaginings of sex and gender across the spectrum of gay and straight as alternatives to rigidifying heterosexual and homosexual binaries.
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Book chapters on the topic "Capacity Spectrum"

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Stabel, Aaron, Kimberly Kroeger-Geoppinger, Jennifer McCullagh, et al. "Diminished Capacity." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_100457.

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Irio, Luis, and Rodolfo Oliveira. "Impact of Mobility in Spectrum Sensing Capacity." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76207-4_14.

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Tang, Yao, and Qian Li. "Capacity and Spectrum Utilization of Spatial, Temporal, and Joint Time-Space Spectrum Sharing." In Human Centered Computing. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31854-7_77.

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Costa, E., H. Haas, and E. Schulz. "Optimization of Capacity Assignement in MC-CDMA Transmission Systems." In Multi-Carrier Spread-Spectrum & Related Topics. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_23.

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Hanly, Stephen. "Congestion Measures and Capacity Constraints in Spread Spectrum Networks." In The Kluwer International Series in Engineering and Computer Science. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1409-7_2.

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Mourad, A. M., A. Guéguen, and R. Pyndiah. "Quantifying the Impact of the MC-CDMA Physical Layer Algorithms on the Downlink Capacity in a Multi-cellular Environment." In Multi-Carrier Spread-Spectrum. Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4437-2_11.

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Gameiro, A. "Capacity Enhancement of DS-CDMA Downlink through Multicarrier with Frequency Overlapping." In Multi-Carrier Spread-Spectrum & Related Topics. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_25.

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Pandit, Shweta, and Ghanshyam Singh. "Capacity Limits Over Fading Environment with Imperfect Channel State Information for Cognitive Radio Networks." In Spectrum Sharing in Cognitive Radio Networks. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53147-2_8.

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Wirsing, Stephan, and Albert Rafetseder. "Genetic Algorithms for Capacity Estimation in Pluralistic Spectrum Licensing Simulations." In Economics of Grids, Clouds, Systems, and Services. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36027-6_23.

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Pandit, Shweta, and Ghanshyam Singh. "Channel Capacity of Cognitive Radio in a Fading Environment with CSI and Interference Power Constraints." In Spectrum Sharing in Cognitive Radio Networks. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53147-2_9.

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Conference papers on the topic "Capacity Spectrum"

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Wang, Xin, Yanjun Yao, Yufeng Zhao, and Xinying Cheng. "Capacity Analysis of Burst Spread Spectrum Satellite System." In 2024 IEEE 12th International Conference on Information, Communication and Networks (ICICN). IEEE, 2024. https://doi.org/10.1109/icicn62625.2024.10761229.

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Anwar, Syed Rashid, Deeplata Sharma, and Pooja Varma. "Investigating Spectrum Sharing Algorithms for Capacity Optimization in 6G Networks." In 2024 15th International Conference on Computing Communication and Networking Technologies (ICCCNT). IEEE, 2024. http://dx.doi.org/10.1109/icccnt61001.2024.10725089.

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Yalinevich, Yarden, Eyal Wohlgemuth, and Dan Sadot. "Spectral Efficient Physical Layer Security by Using Coherent All-Optical Processing and Multichannel Obfuscation." In Signal Processing in Photonic Communications. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/sppcom.2024.spw2h.4.

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A spectral-efficient physical layer security system is introduced, which enhances capacity by transmitting multiple channels over shared spectrum. Demonstrating that the success probability of an attack is extremely low and further decreases with the inclusion of more channels.
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Zhang, Feng, Wenyi Zhang, and Qiang Ling. "Capacity offload game over unlicensed spectrum." In ICC 2012 - 2012 IEEE International Conference on Communications. IEEE, 2012. http://dx.doi.org/10.1109/icc.2012.6363710.

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Shankar, S. N., Chun-Ting Chou, K. Challapali, and S. Mangold. "Spectrum agile radio: capacity and QoS implications of dynamic spectrum assignment." In GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. IEEE, 2005. http://dx.doi.org/10.1109/glocom.2005.1578214.

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Aschheim, Mark. "Yield Point Spectra: A Simple Alternative to the Capacity Spectrum Method." In Structures Congress 2000. American Society of Civil Engineers, 2000. http://dx.doi.org/10.1061/40492(2000)112.

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Li, Yang, and Aria Nosratinia. "Spectrum-sharing capacity enhancement with distributed relaying." In ICC 2012 - 2012 IEEE International Conference on Communications. IEEE, 2012. http://dx.doi.org/10.1109/icc.2012.6363690.

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Shoufeng Wang, Fan Li, Weidong Wang, Yinghai Zhang, and Guangzhi Zhong. "Capacity matching in spectrum access for Cognitive Radio." In Multimedia Technology (IC-BNMT 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbnmt.2010.5705137.

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Ghasemi, Amir, and Elvino Sousa. "Capacity of Fading Channels Under Spectrum-Sharing Constraints." In 2006 IEEE International Conference on Communications. IEEE, 2006. http://dx.doi.org/10.1109/icc.2006.255326.

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Santivanez, Cesar. "Transport Capacity of Opportunistic Spectrum Access (OSA) MANETs." In 2007 2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM). IEEE, 2007. http://dx.doi.org/10.1109/crowncom.2007.4549765.

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Reports on the topic "Capacity Spectrum"

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Hegde, M. V., and W. E. Stark. Capacity of Frequency-Hop Spread-Spectrum Multiple-Access Communication Systems. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada200616.

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Honig, Michael L. Adaptive Signal Processing Techniques for Robust, High Capacity Spread- Spectrum Multiple Access. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada422622.

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Widmer, Mireille, Marina Apgar, Jiniya Afroze, Sudhir Malla, Jill Healey, and Sendrine Constant. Capacity Development in a Participatory Adaptive Programme: the Case of the Clarissa Consortium. Institute of Development Studies, 2022. http://dx.doi.org/10.19088/clarissa.2022.001.

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Doing development differently rests on deliberate efforts to reflect and learn, not just about what programmes are doing and achieving, but about how they are working. This is particularly important for an action research programme like Child Labour: Action- Research-Innovation in South and South-Eastern Asia (CLARISSA), which is implemented by a consortium of organisations from across the research and development spectrum, during a rapidly changing global pandemic. Harnessing the potential of diverse skills and complementary strengths across partners in responding to the complex challenge of the worst forms of child labour, requires capacity to work together in novel ways. This Research and Evidence Paper documents how CLARISSA approached capacity development, and what we learnt from our challenges and successes. From the start, the programme incorporated a capacity development strategy resting on self-assessment of a wide range of behavioural and technical competencies that were deemed important for programme implementation, formal training activities, and periodic review of progress through an after-action review (AAR) process. An inventory of capacity development activities that took place during the first year of implementation reveals a wide range of additional, unplanned activities, enabled by the programme’s flexibility and adaptive management strategy. These are organised into eight modalities, according to the individual or collective nature of the activity, and its sequencing – namely, whether capacity development happens prior to, during, or after (from) implementation. We conclude with some reflections on the emergent nature of capacity development. Planning capacity development in an adaptive programme provides a scaffolding in terms of time, resources, and legitimacy that sustains adaptiveness. We also recognise the gaps that remain to be addressed, particularly on scaling up individual learning to collective capabilities, and widening the focus from implementation teams to individuals working at consortium level.
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Widmer, Mireille, Marina Apgar, Jiniya Afroze, Sudhir Malla, Jill Healey, and Sendrine Constant. Capacity Development in a Participatory Adaptive Programme: the Case of the Clarissa Consortium. Institute of Development Studies, 2022. http://dx.doi.org/10.19088/clarissa.2022.001.

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Doing development differently rests on deliberate efforts to reflect and learn, not just about what programmes are doing and achieving, but about how they are working. This is particularly important for an action research programme like Child Labour: Action- Research-Innovation in South and South-Eastern Asia (CLARISSA), which is implemented by a consortium of organisations from across the research and development spectrum, during a rapidly changing global pandemic. Harnessing the potential of diverse skills and complementary strengths across partners in responding to the complex challenge of the worst forms of child labour, requires capacity to work together in novel ways. This Research and Evidence Paper documents how CLARISSA approached capacity development, and what we learnt from our challenges and successes. From the start, the programme incorporated a capacity development strategy resting on self-assessment of a wide range of behavioural and technical competencies that were deemed important for programme implementation, formal training activities, and periodic review of progress through an after-action review (AAR) process. An inventory of capacity development activities that took place during the first year of implementation reveals a wide range of additional, unplanned activities, enabled by the programme’s flexibility and adaptive management strategy. These are organised into eight modalities, according to the individual or collective nature of the activity, and its sequencing – namely, whether capacity development happens prior to, during, or after (from) implementation. We conclude with some reflections on the emergent nature of capacity development. Planning capacity development in an adaptive programme provides a scaffolding in terms of time, resources, and legitimacy that sustains adaptiveness. We also recognise the gaps that remain to be addressed, particularly on scaling up individual learning to collective capabilities, and widening the focus from implementation teams to individuals working at consortium level.
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Waters, Donald. Meeting the Climate Emergency: University Information Infrastructure for Researching Wicked Problems. Coalition for Networked Information, 2025. https://doi.org/10.56561/lcoa2799.

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Commissioned by the Coalition for Networked Information, this report examines the role of research universities in addressing complex societal challenges. It focuses on climate change, which is best characterized as a “wicked” problem. Such problems are difficult to define and lack clear solutions in part because they involve multiple stakeholders who sometimes have sharply differing interests and perspectives. Given this complexity, understanding climate change is not just a matter for researchers in the STEM fields of science, technology, engineering, and medicine. It requires an all-hands-on-deck approach across the disciplinary spectrum, including experts from the social sciences and humanities. It also requires deep engagement of researchers with the public. With their faculties in a wide array of disciplines, their capacity for large-scale research, and their sensitivity to the public interest, research universities in the United States are especially well-positioned to address wicked problems like climate change. However, to be most effective, they need to rebalance their emphasis on the STEM fields and make other key structural reforms. This report argues that university libraries, campus computing organizations, and other information specialists must be part of such reforms. Indeed, with a strategic redeployment of their resources within the university’s research and information infrastructure, they could help catalyze these much needed changes. Any transformation in how universities approach wicked problems like climate change must include a recognition that over the last three decades campus information specialists have dramatically shifted the primary nature of their services. From traditional roles of collection building and the provision of equipment, software, and bandwidth, these experts now have a much broader set of skills, which they regularly apply to help faculty gather and use whatever physical and digital materials they need for research and learning as they need them. For wicked problem research, this report proposes that university libraries and related information resource organizations should now modify their research service strategies even further. They should focus more attention on standard, university-supported centers and institutes that conduct interdisciplinary research on climate change. They should then aim to: (a) broaden the disciplinary range, (b) deepen the public engagement, and (c) extend the analytical capabilities of those research centers and institutes. Overall, this report underscores the urgency and complexity of climate change and other wicked problems that impede human flourishing and offers concrete steps by which universities could adapt their research infrastructure to address these problems more effectively.
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Levisohn, Sharon, Mark Jackwood, and Stanley Kleven. New Approaches for Detection of Mycoplasma iowae Infection in Turkeys. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7612834.bard.

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Mycoplasma iowae (Mi) is a pathogenic avian mycoplasma which causes mortality in turkey embryos and as such has clinical and economic significance for the turkey breeder industry. Control of Mi infection is severely hampered by lack of adequate diagnostic tests, together with resistance to most antibiotics and resilience to environment. A markedly high degree of intra-species antigenic variation also contributes to difficulties in detection and control of infection. In this project we have designed an innovative gene-based diagnostic test based on specific amplification of the 16S rRNA gene of Mi. This reaction, designed Multi-species PCR-RFLP test, also amplifies the DNA of the pathogenic avian mycoplasmas M. gallisepticum (Mg) and M. synoviae (Ms). This test detects DNA equivalent to about 300 cfu Mi or either of the other two target mycoplasmas, individually or in mixed infection. It is a quick test, applicable to a wide variety of clinical samples, such as allantoic fluid or tracheal or cloacal swab suspensions. Differential diagnosis is carried out by gel electro-phoresis of the PCR amplicon digested with selected restriction enzymes (Restriction Fragment Length Polymorphism). This can also be readily accomplished by using a simple Dot-Blot hybridization assay with digoxigenin-labeled oligonucleotide probes reacting specifically with unique Mi, Mg or Ms sequences in the PCR amplicon. The PCR/OLIGO test increased sensitivity by at least 10-fold with a capacity for rapid testing of large numbers of samples. Experimental infection trials were carried out to evaluate the diagnostic tools and to study pathogenesis of Mi infection. Field studies and experimental infection of embryonated eggs indicated both synergistic and competitive interaction of mycoplasma pathogens in mixed infection. The value of the PCR diagnostic tests for following the time course of egg transmission was shown. A workable serological test (Dot Immunobinding Assay) was also developed but there was no clear-cut evidence that infected turkeys develop an immune response. Typing of a wide spectrum of Mi field isolates by a variety of gene-based molecular techniques indicated a higher degree of genetic homogeneity than predicted on the basis of the phenotypic variability. All known strains of Mi were detected by the method developed. Together with an M. meleagridis-PCR test based on the same gene, the Multi-species PCR test is a highly valuable tool for diagnosis of pathogenic mycoplasmas in single or mixed infection. The further application of this rapid and specific test as a part of Mi and overall mycoplasma control programs will be dependent on developments in the turkey industry.
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Hausmann, Ricardo, and Michael Gavin. Preventing Crisis and Contagion: Fiscal and Financial Dimensions. Inter-American Development Bank, 1999. http://dx.doi.org/10.18235/0010764.

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Recent economic developments highlight Latin America's vulnerability to economic and financial turmoil that is triggered by events in distant corners of the globe. The Asian financial crisis that began in 1997 and the more recent Russian crisis have left the region profoundly shaken, and living in fear of a full-scale collapse. This "contagion" has occurred through a number of channels. The collapse of Asian demand has contributed to the recent slide in world commodity prices, cutting into the commodity-dependent region's export income and undermining the public finances in a number of countries. The Russian devaluation has raised the spectre of sovereign default, making investors around the globe more wary of increasing their cross-border exposure. The financial crises in Asia and Russia have also severely undermined balance sheets of emerging-market investors, reducing their capacity to invest in the region, and forcing them into fire sales of their Latin American investments. In this paper we lay out the fiscal and financial policies that can help protect economies from the kind of global financial turbulence the world is now experiencing. Exchange rate policies are discussed in a separate paper.
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Veloso, Rita Carvalho, Catarina Dias, Andrea Resende Souza, Joana Maia, Nuno M. M. Ramos, and João Ventura. Improving the optical properties of finishing coatings for façade systems. Department of the Built Environment, 2023. http://dx.doi.org/10.54337/aau541592743.

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The need to improve energy efficiency of the building stock has led to a continuous increase in the implementation of exterior thermal insulation systems, such as ETICS. Progressively, these systems are being applied with darker colours, increasing the concern for hygrothermal behaviour and durability. Despite the significant developed studies, very few reports regarding their optical properties are available. The optical and catalytic capacity turns nanomaterials into excellent candidates for use in finishing coatings with high solar reflectance with dark colours without affecting the aesthetic characteristics, thus improving the durability of such coatings. Our study targeted the development of innovative envelope systems by increasing their solar reflectance through new finishing coatings formulations with the inclusion of nanoparticles. For that, it is necessary to develop and optimize nanoparticles formulations to achieve a high near-infrared reflectance. Here, we studied how the incorporation of reflective nanomaterials influence the optical behaviour of a black colourant for a finishing coating, varying the concentration in the coating from 0 to 20%. Such optical performance was experimentally evaluated through spectral reflectance calculations using a modular spectrophotometer, which allowed an understanding of the relation between these properties and the morphological and structural characteristics of the nanoparticles. The results from such studies can help formulate new finishing coatings with increased near-infrared reflectance of buildings façades, using, for instance, more than one type of nanoparticle.
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Hammad, Ali, and Mohamed Moustafa. Seismic Behavior of Special Concentric Braced Frames under Short- and Long-Duration Ground Motions. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2019. http://dx.doi.org/10.55461/zont9308.

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Over the past decade, several long-duration subduction earthquakes took place in different locations around the world, e.g., Chile in 2010, Japan in 2011, China in 2008, and Indonesia in 2004. Recent research has revealed that long-duration, large-magnitude earthquakes may occur along the Cascadia subduction zone of the Pacific Northwest Coast of the U.S. The duration of an earthquake often affects the response of structures. Current seismic design specifications mostly use response spectra to identify the hazard and do not consider duration effects. Thus, a comprehensive understanding of the effect of the duration of the ground motion on structural performance and its design implications is an important issue. The goal of this study was to investigate how the duration of an earthquake affects the structural response of special concentric braced frames (SCBFs). A comprehensive experimental program and detailed analytical investigations were conducted to understand and quantify the effect of duration on collapse capacity of SCBFs, with the goal of improving seismic design provisions by incorporating these effects. The experimental program included large-scale shake table tests, and the analytical program consisted of pre-test and post-test phases. The pre-test analysis phase performed a sensitivity analysis that used OpenSees models preliminarily calibrated against previous experimental results for different configuration of SCBFs. A tornado-diagram framework was used to rank the influence of the different modeling parameters, e.g., low-cycle fatigue, on the seismic response of SCBFs under short- and long-duration ground motions. Based on the results obtained from the experimental program, these models were revisited for further calibration and validation in the post-test analysis. The experimental program included three large-scale shake-table tests of identical single-story single-bay SCBF with a chevron-brace configuration tested under different ground motions. Two specimens were tested under a set of spectrally-matched short and long-duration ground motions. The third specimen was tested under another long-duration ground motion. All tests started with a 100% scale of the selected ground motions; testing continued with an ever-increasing ground-motion scale until failure occurred, e.g., until both braces ruptured. The shake table tests showed that the duration of the earthquake may lead to premature seismic failure or lower capacities, supporting the initiative to consider duration effects as part of the seismic design provisions. Identical frames failed at different displacements demands because of the damage accumulation associated with the earthquake duration, with about 40% reduction in the displacement capacity of the two specimens tested under long-duration earthquakes versus the short-duration one. Post-test analysis focused first on calibrating an OpenSees model to capture the experimental behavior of the test specimens. The calibration started by matching the initial stiffness and overall global response. Next, the low-cycle fatigue parameters were fine-tuned to properly capture the experimental local behavior, i.e., brace buckling and rupture. The post-test analysis showed that the input for the low-cycle fatigue models currently available in the literature does not reflect the observed experimental results. New values for the fatigue parameters are suggested herein based on the results of the three shake-table tests. The calibrated model was then used to conduct incremental dynamic analysis (IDA) using 44 pairs of spectrally-matched short- and long-duration ground motions. To compare the effect of the duration of ground motion, this analysis aimed at incorporating ground-motion variability for more generalized observations and developing collapse fragility curves using different intensity measures (IMs). The difference in the median fragility was found to be 45% in the drift capacity at failure and about 10% in the spectral acceleration (Sa). Using regression analysis, the obtained drift capacity from analysis was found to be reduced by about 8% on average for every additional 10 sec in the duration of the ground motion. The last stage of this study extended the calibrated model to SCBF archetype buildings to study the effect of the duration of ground motion on full-sized structures. Two buildings were studied: a three-story and nine-story build that resembled the original SAC buildings but were modified with SCBFs as lateral support system instead of moment resisting frames. Two planer frames were adopted from the two buildings and used for the analysis. The same 44 spectrally-matched pairs previously used in post-test analysis were used to conduct nonlinear time history analysis and study the effect of duration. All the ground motions were scaled to two hazard levels for the deterministic time history analysis: 10% exceedance in 50 years and 2% exceedance in 50 years. All analysis results were interpreted in a comparative way to isolate the effect of duration, which was the main variable in the ground-motion pairs. In general, the results showed that the analyzed SCBFs experienced higher drift values under the long-duration suite of ground motions, and, in turn, a larger percentage of fractured braces under long-duration cases. The archetype SCBFs analysis provided similar conclusions on duration effects as the experimental and numerical results on the single-story single-bay frame.
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Dietiker, B., A. J. M. Pugin, H. L. Crow, K. D. Brewer, and H. A. J. Russell. Seismic survey results from a buried valley study, Elora and Guelph, Ontario. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/pd24sxky79.

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Les vallées enfouies constituent un type d'aquifère important dans le paysage glaciaire du Canada. En raison de l'histoire complexe de l'érosion et du remplissage, il peut être difficile de définir la géométrie de la vallée et les caractéristiques des sédiments. Des transects sismiques de deux vallées enfouies précédemment identifiées ont été acquis en Ontario à l'Arboretum de l'Université de Guelph et dans un environnement périurbain au sud de la ville voisine d'Elora. Une étude de sismique réflexion à haute résolution a permis de recueillir trois kilomètres linéaires de données le long de quatre transects. Cette étude a été complétée par une étude microtremor HVSR (rapport spectral horizontal/vertical) le long des profils de réflexion. L'objectif de l'étude globale était d'améliorer la résolution des géométries des vallées et des caractéristiques des sédiments. Un autre objectif était de tester la capacité de la méthode HVSR à fournir des informations de reconnaissance sur la présence de vallées enfouies dans une zone à la lithostratigraphie complexe. Les deux méthodes sismiques ont permis de délimiter les vallées enfouies. Trois des quatre transects de réflexion sismique ont permis d'imager les vallées enfouies qui mesurent environ 200 m de large et 30 à 65 m de profondeur. Les vallées ont des côtés asymétriques abrupts avec un caractère en escalier à un endroit. Les levés HVSR ont permis d'imager la surface du substratum rocheux ainsi qu'une unité de haute résonance moins profonde qui correspond à une unité de till. La méthode s'est avérée efficace en tant que technique de reconnaissance lorsque des contraintes géologiques sont disponibles. Ce rapport contient trois annexes avec des données, des informations de traitement et des images interprétées.
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