Relevant bibliographies by topics / Keystones

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

Academic literature on the topic 'Keystones'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 February 2023

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Journal articles on the topic "Keystones"

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Pruitt, Jonathan N., and Noa Pinter-Wollman. "The legacy effects of keystone individuals on collective behaviour scale to how long they remain within a group." Proceedings of the Royal Society B: Biological Sciences 282, no. 1814 (September 7, 2015): 20151766. http://dx.doi.org/10.1098/rspb.2015.1766.

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The collective behaviour of social groups is often strongly influenced by one or few individuals, termed here ‘keystone individuals’. We examined whether the influence of keystone individuals on collective behaviour lingers after their departure and whether these lingering effects scale with their tenure in the group. In the social spider, Stegodyphus dumicola , colonies' boldest individuals wield a disproportionately large influence over colony behaviour. We experimentally manipulated keystones' tenure in laboratory-housed colonies and tracked their legacy effects on collective prey capture following their removal. We found that bolder keystones caused more aggressive collective foraging behaviour and catalysed greater inter-individual variation in boldness within their colonies. The longer keystones remained in a colony, the longer both of these effects lingered after their departure. Our data demonstrate that, long after their disappearance, keystones have large and lasting effects on social dynamics at both the individual and colony levels.
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Baez, John C., and John D. Foley. "Keystones." Notices of the American Mathematical Society 68, no. 06 (June 1, 2021): 1. http://dx.doi.org/10.1090/noti2295.

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Fields, Evan. "Keystones." Notices of the American Mathematical Society 67, no. 11 (December 1, 2020): 1. http://dx.doi.org/10.1090/noti2175.

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Lopez, Hector. "Keystones." Notices of the American Mathematical Society 68, no. 10 (November 1, 2021): 1. http://dx.doi.org/10.1090/noti2374.

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Ang, Ling Ling, Jordan Milev, and John Scalf. "Keystones." Notices of the American Mathematical Society 68, no. 07 (August 1, 2021): 1. http://dx.doi.org/10.1090/noti2311.

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Molina-Markham, Andres, and Joseph J. Rushanan. "Keystones." Notices of the American Mathematical Society 67, no. 05 (May 1, 2020): 1. http://dx.doi.org/10.1090/noti2081.

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Pruitt, Jonathan N., Colin M. Wright, Carl N. Keiser, Alex E. DeMarco, Matthew M. Grobis, and Noa Pinter-Wollman. "The Achilles' heel hypothesis: misinformed keystone individuals impair collective learning and reduce group success." Proceedings of the Royal Society B: Biological Sciences 283, no. 1823 (January 27, 2016): 20152888. http://dx.doi.org/10.1098/rspb.2015.2888.

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Many animal societies rely on highly influential keystone individuals for proper functioning. When information quality is important for group success, such keystone individuals have the potential to diminish group performance if they possess inaccurate information. Here, we test whether information quality (accurate or inaccurate) influences collective outcomes when keystone individuals are the first to acquire it. We trained keystone or generic individuals to attack or avoid novel stimuli and implanted these trained individuals within groups of naive colony-mates. We subsequently tracked how quickly groups learned about their environment in situations that matched (accurate information) or mismatched (inaccurate information) the training of the trained individual. We found that colonies with just one accurately informed individual were quicker to learn to attack a novel prey stimulus than colonies with no informed individuals. However, this effect was no more pronounced when the informed individual was a keystone individual. In contrast, keystones with inaccurate information had larger effects than generic individuals with identical information: groups containing keystones with inaccurate information took longer to learn to attack/avoid prey/predator stimuli and gained less weight than groups harbouring generic individuals with identical information. Our results convey that misinformed keystone individuals can become points of vulnerability for their societies.
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Hrnčiar, Michal. "Keystones of Irregular Warfare." International conference KNOWLEDGE-BASED ORGANIZATION 23, no. 1 (June 20, 2017): 150–54. http://dx.doi.org/10.1515/kbo-2017-0023.

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Abstract The current security environment is evolving towards a global complexity of unpredictable events. The risk of state and non-state actors attempting to achieve their goals through destabilization exists. In the operating environment, this implies a blurring of the boundaries between state and nonstate actors (such as insurgents, terrorists and criminals) and NATO may confront an adversary who uses traditional (conventional), irregular warfare or both (hybrid warfare). The aim of the article is to find, analyze and describe the key elements that fundamentally different irregular of traditional (conventional) and hybrid warfare.
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Röttjers, Lisa, and Karoline Faust. "Can we predict keystones?" Nature Reviews Microbiology 17, no. 3 (December 12, 2018): 193. http://dx.doi.org/10.1038/s41579-018-0132-y.

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Bronson, James W. "Keystones of Entrepreneurship Knowledge." New England Journal of Entrepreneurship 10, no. 1 (March 1, 2007): 59–60. http://dx.doi.org/10.1108/neje-10-01-2007-b005.

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Dissertations / Theses on the topic "Keystones"

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Дмитренко, Алла Олександрівна, Алла Александровна Дмитренко, and Alla Oleksandrivna Dmytrenko. "Keystones for attainment eco-efficiency of clean production." Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/8141.

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The World Business Council for Sustainable Development guideline ‘reduce toxic dispersion’ is the weakest formulation of the seven and reflects the vigour with which some branches of the global industry have defended their products in spite of their prevalent unsafe for environment. Clean production is one way in which eco-efficiency has been put into effect. Yet the pressure to develop green chemicals and alternative non-toxic products has been intense and increasingly successful. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/8141
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Visser, Vernon. "Keystone megaherbivore hypothesis - white elephants?" Bachelor's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/26690.

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Pham, Truc T., and Michael J. Sieber. "Positive communications: the keystone of counterinsurgency strategy." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/38993.

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Approved for public release; distribution is unlimited.
Over the last decade, the United States military has struggled to develop methodologies to assess success in its execution of counterinsurgency operations. By examining Zabul province, Afghanistan, this study offers a quantitative method to measure the effectiveness of positive communications that counterinsurgents conduct as part of their information strategy to mobilize public support for the incumbent government. We test the hypothesis that positive communications play a significant role in shaping popular attitudes and, when conducted by counterinsurgents, influence the population to support the government and deny safe haven for insurgents. Estimating a variety of regression models, we utilize high-resolution spatio-temporal data to isolate the casual effect of population engagements and radio broadcasts in relation to levels of insurgent violence over time and space. The evidence supports our prediction that positive communications conducted by counterinsurgents reduce insurgent violence.
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Hale, Sarah Luinda, and Sarah Luinda Hale. "Reestablishment of a Keystone Species: Initial Outcomes and Ecosystem Responses." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625853.

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The keystone species concept was introduced in 1969 in reference to top-down regulation of communities by predators, but has expanded to include myriad species at different trophic levels. Keystone species play disproportionately large, important roles in their ecosystems, but human-wildlife conflicts often drive population declines. A prominent example of anthropogenically driven keystone species decline is the prairie dog (Cynomys spp.) in North America. Prairie dogs were once widespread, but were considered pests and eradicated throughout much of the North American west; however, prairie dogs are keystone species that maintain the organization and diversity of their ecosystem, thus their removal can have a cascade of effects on the environment. Population declines have resulted in the necessity of keystone species reintroductions, however, studies of such reintroductions are rare. Managers have reintroduced prairie dogs as a grassland conservation tool, but often do not monitor populations intensively enough following reintroduction to accurately determine success. Furthermore, most studies of keystone species do not assess ecosystem-level effects of reestablishment. I studied four recently reestablished black-tailed prairie dog (Cynomys ludovicianus) colonies to determine if the reestablishment effort was successful, and if keystone roles were resumed after a prolonged absence. I found that two of three prairie dog populations monitored for demography grew, and three of four prairie dog colonies expanded in area. Furthermore, I found that reestablished black-tailed prairie dogs did not immediately influence small mammal diversity, richness, or abundance, but prairie dogs did resume their keystone role of regulating woody plant growth on colonies.
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Cochran-Yu, David Kyle. "A keystone of contention : the Earldom of Ross, 1215-1517." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7242/.

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The earldom of Ross was a dominant force in medieval Scotland. This was primarily due to its strategic importance as the northern gateway into the Hebrides to the west, and Caithness and Sutherland to the north. The power derived from the earldom’s strategic situation was enhanced by the status of its earls. From 1215 to 1372 the earldom was ruled by an uninterrupted MacTaggart comital dynasty which was able to capitalise on this longevity to establish itself as an indispensable authority in Scotland north of the Forth. By the fifteenth century the earldom had passed to an equally powerful dynasty, the MacDonald lords of the Isles, and became a part of one of the most powerful regional hegemonies of medieval Scotland. The earldom and the power of its earls are acknowledged by most scholars, yet it remains a relatively under-analysed subject, as scholarship tends to gravitate towards viewing Ross through the MacDonald lordship of the Isles, or through the Scottish kings. This has led to Ross being treated as a secondary subject. Moreover, little has been done to compare the two principal dynasties that ruled the earldom and explore issues of continuity between the two. This thesis will study Ross through the comital dynasties that ruled it and the important local magnates within it, and will provide a Ross-centred platform from which to analyse the political development of the earldom. The thesis will also address issues of continuity, beginning with the origins of the Mac ant t-sagairt earldom and trace its political evolution until the MacDonald claim to Ross was finally extinguished in the early sixteenth century. This thesis will be the first long duree study of this Scottish earldom, and will increase our understanding of Ross and its earls who were so vital to Scotland’s medieval history.
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Carabello, Damian Anthony. "Koz-ez's of good intention An analysis of the effectiveness, outcomes, & legislative intent of Pennsylvania's keystone opportunity zone & expansion zone programs /." Instructions for remote access, 2009. http://www.kutztown.edu/library/services/remote_access.asp.

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Thesis (M.P.A.)--Kutztown University of Pennsylvania, 2009.
Source: Masters Abstracts International, Volume: 47-05, page: 2639. Adviser: Paula A. Holoviak. Includes supplementary digital materials.
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Hitchman, Sean M. "A mosaic approach can advance the understanding and conservation of native biodiversity in natural and fragmented riverscapes." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/38559.

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Doctor of Philosophy
Division of Biology
Martha E. Mather
Understanding the complex relationship between organismal distribution and spatial heterogeneity is central to many ecological questions. This challenge of identifying the biodiversity consequences of spatial patterns is especially critical for resource conservation at the larger riverscape scale because climate- and human-related impacts often act through intricate and spatially-connected organismal-habitat relationships. Specifically, resource managers cannot manage the adverse effects of common disturbances on aquatic ecosystems (e.g. water-withdrawal, dams, urbanization) if the influence of spatial heterogeneity is not recognized and understood. Towards this larger goal, I examined the role of spatial heterogeneity on stream fish biodiversity in the Upper Neosho River, KS in three ways. First, I used a mosaic approach (in which connected, interacting collections of juxtaposed habitat patches were examined) to build the scientific foundation for a general model that aids in the understanding and environmental management of disturbance-related, ecologically-based conservation problems. Second, I examined landscape metrics to quantify the impact of low-head dams on stream habitat and fish diversity. Third, I evaluated multiple quantitative approaches to develop a fuller understanding of how the arrangement of habitats across the riverscape influenced stream fish biodiversity. Related to these questions, the dissertation research provided four key take-home messages that advanced science-based conservation related to stream fish habitat and biodiversity. First, mapping larger-scale patterns of heterogeneity showed that quantitatively-different, physically-distinct pool, riffle, run, and glide habitats were arranged in unique combinations created diverse habitat mosaics across sites. Second, riffles, which comprised < 5% of all habitat patches, acted as keystone habitats that disproportionately increased fish biodiversity (i.e., species richness was significantly higher in mosaics with higher numbers of riffles). Third, mosaic approach metrics provided new insights into the influence of low-head dams on stream fish biodiversity that were not detected with traditional approaches to habitat sampling and statistical analysis. For example, low-head dams dampened the natural habitat diversity that is needed for the maintenance of resilient communities. Furthermore, using path analysis, I found that species richness was higher immediately below low-head dams as mediated through an increase in the proportion of riffle habitat, but this higher species richness was offset by a greater decrease in species richness in the impoundment habitat above low-head dams. Thus, the choice of scale influenced the interpretation of how dams affected habitat heterogeneity and resultant organismal patterns. Finally, landscape approaches to examining compositional and configurational heterogeneity provided new insights about stream fish habitat-biodiversity relationships. For example, riffle patch density had a positive effect on species richness, species richness was higher within shallow, slow flowing riffles, and adjacent neighbor habitats affected riffle species richness as mediated through alterations to within-habitat characteristics. In summary, quantifying the complex patterns of spatial heterogeneity in a range of ways can aid in the understanding of habitat-biodiversity patterns and help conserve stream fishes at a variety of scales.
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Netzer, Gilbert. "Efficient LU Factorization for Texas Instruments Keystone Architecture Digital Signal Processors." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170445.

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The energy consumption of large-scale high-performance computer (HPC) systems has become one of the foremost concerns of both data-center operators and computer manufacturers. This has renewed interest in alternative computer architectures that could offer substantially better energy-efficiency.Yet, the for the evaluation of the potential of these architectures necessary well-optimized implementations of typical HPC benchmarks are often not available for these for the HPC industry novel architectures. The in this work presented LU factorization benchmark implementation aims to provide such a high-quality tool for the HPC industry standard high-performance LINPACK benchmark (HPL) for the eight-core Texas Instruments TMS320C6678 digitalsignal processor (DSP). The presented implementation could perform the LU factorization at up to 30.9 GF/s at 1.25 GHz core clock frequency by using all the eight DSP cores of the System-on-Chip (SoC). This is 77% of the attainable peak double-precision floating-point performance of the DSP, a level of efficiency that is comparable to the efficiency expected on traditional x86-based processor architectures. A presented detailed performance analysis shows that this is largely due to the optimized implementation of the embedded generalized matrix-matrix multiplication (GEMM). For this operation, the on-chip direct memory access (DMA) engines were used to transfer the necessary data from the external DDR3 memory to the core-private and shared scratchpad memory. This allowed to overlap the data transfer with computations on the DSP cores. The computations were in turn optimized by using software pipeline techniques and were partly implemented in assembly language. With these optimization the performance of the matrix multiplication reached up to 95% of attainable peak performance. A detailed description of these two key optimization techniques and their application to the LU factorization is included. Using a specially instrumented Advantech TMDXEVM6678L evaluation module, described in detail in related work, allowed to measure the SoC’s energy efficiency of up to 2.92 GF/J while executing the presented benchmark. Results from the verification of the benchmark execution using standard HPL correctness checks and an uncertainty analysis of the experimentally gathered data are also presented.
Energiförbrukningen av storskaliga högpresterande datorsystem (HPC) har blivit ett av de främsta problemen för såväl ägare av dessa system som datortillverkare. Det har lett till ett förnyat intresse för alternativa datorarkitekturer som kan vara betydligt mer effektiva ur energiförbrukningssynpunkt. För detaljerade analyser av prestanda och energiförbrukning av dessa för HPC-industrin nya arkitekturer krävs väloptimerade implementationer av standard HPC-bänkmärkningsproblem. Syftet med detta examensarbete är att tillhandhålla ett sådant högkvalitativt verktyg i form av en implementation av ett bänkmärkesprogram för LU-faktorisering för den åttakärniga digitala signalprocessorn (DSP) TMS320C6678 från Texas Instruments. Bänkmärkningsproblemet är samma som för det inom HPC-industrin välkända bänkmärket “high-performance LINPACK” (HPL). Den här presenterade implementationen nådde upp till en prestanda av 30,9 GF/s vid 1,25 GHz klockfrekvens genom att samtidigt använda alla åtta kärnor i DSP:n. Detta motsvarar 77% av den teoretiskt uppnåbara prestandan, vilket är jämförbart med förväntningar på effektivteten av mer traditionella x86-baserade system. En detaljerad prestandaanalys visar att detta tillstor del uppnås genom den högoptimerade implementationen av den ingående matris-matris-multiplikationen. Användandet av specialiserade “direct memory access” (DMA) hårdvaruenheter för kopieringen av data mellan det externa DDR3 minnet och det interna kärn-privata och delade arbetsminnet tillät att överlappa dessa operationer med beräkningar. Optimerade mjukvaruimplementationer av dessa beräkningar, delvis utförda i maskinspåk, tillät att utföra matris-multiplikationen med upp till 95% av den teoretiskt nåbara prestandan. I rapporten ges en detaljerad beskrivning av dessa två nyckeltekniker. Energiförbrukningen vid exekvering av det implementerade bänkmärket kunde med hjälp av en för ändamålet anpassad Advantech TMDXEVM6678L evalueringsmodul bestämmas till maximalt 2,92 GF/J. Resultat från verifikationen av bänkmärkesimplementationen och en uppskattning av mätosäkerheten vid de experimentella mätningarna presenteras också.
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Catano, Christopher. "Species and habitat interactions of the gopher tortoise: A keystone species?" Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5153.

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Species-species and species-habitat interactions have been demonstrated to be important in influencing diversity across a variety of ecosystems. Despite generalities in the importance of these interactions, appropriate mechanisms to explain them are absent in many systems. In sandhill systems of the southeast U.S., gopher tortoises have been hypothesized to be a crucial species in the maintenance of diversity and function. However, the mechanisms and magnitude in which they influence their communities and habitats have rarely been empirically quantified. I examined how habitat structure influences tortoise abandonment of burrows and how tortoise densities influence non-volant vertebrate community diversity. Tortoise burrow abandonment is directly influenced by canopy closure, with each percent increase in canopy cover relating to a ~2% increase in the probability of burrow abandonment. In addition, tortoise burrow density was positively correlated with diversity and evenness, but not species richness. This influence was directly proportional to burrow density, supporting a dominance role for this species and rejecting the commonly asserted keystone species mechanism. I also quantified the influence of tortoises in influencing diversity relative to other environmental and habitat variables. Through this research, I have demonstrated that disturbance and habitat structure are important, but diversity responds most to density of burrows in the habitat. These findings demonstrate the intricate relationships interacting to maintaining diversity in sandhill systems. In particular, habitat change leading to declines of gopher tortoises may have drastic negative impacts on vertebrate species diversity.
M.S.
Masters
Biology
Sciences
Biology
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Montenegro, Olga Lucia. "Natural licks as keystone resources for wildlife and people in Amazonia." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008440.

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Books on the topic "Keystones"

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Writing keystones: Essays and research. New York: Pearson Longman, 2004.

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Keystones of faith, or, What and why we believe. New York: Baker and Taylor, 1985.

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Economic keystones: The weight system of the kingdom of Judah. Sheffield, England: Sheffield Academic Press, 1998.

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Cahoon, Herbert. Treasures of learning: Keystones of the Barrett Library of American Literature. Charlottesville: University of Virginia Library, Department of Rare Books, 1986.

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Gordon, Nelson James, Serafin Rafal 1959-, and NATO Advanced Research Workshop on Contributions of National Parks and Protected Areas to Heritage, Conservation, Tourism, and Sustainable Development (1996 : Kraków, Poland), eds. National parks and protected areas: Keystones to conservation and sustainable development. Berlin: Springer, 1997.

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Keystones of the world: Ten narratives highlighting the significance of stones in the Torah. Southfield, MI: Targum Press, 2002.

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1948-, Arens Detlev, ed. Gewölbe des Himmels: Die schönsten Kirchen und Kathedralen. Köln: DuMont, 2001.

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Barbara, Schock-Werner, ed. Gewölbe des Himmels. München: Collection Rolf Heyne, 2010.

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Panati, Manikanta. Beginning KeystoneJS. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9.

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Tunis, John Roberts. Keystone kids. San Diego: Harcourt Brace Jovanovich, 1987.

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Book chapters on the topic "Keystones"

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Starey, Nigel. "Keystones." In Health and Social Care in the Digital World, 17–27. First edition. | Boca Raton : CRC Press, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003031079-2.

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Allday, Jonathan. "Four Keystones." In Space-time, 5–26. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2019] |: CRC Press, 2019. http://dx.doi.org/10.1201/9781315165141-2.

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Ferradi, Houda, Rémi Géraud, Diana Maimuț, David Naccache, and David Pointcheval. "Legally Fair Contract Signing Without Keystones." In Applied Cryptography and Network Security, 175–90. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39555-5_10.

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Cheng, Xiangzhan. "On the Four Keystones of Ecological Aesthetic Appreciation." In East Asian Ecocriticisms, 221–36. New York: Palgrave Macmillan US, 2013. http://dx.doi.org/10.1057/9781137345363_13.

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Capone, Mara, Daniela Palomba, and Emanuela Lanzara. "Five Keystones Vaults Parametric Model Generation from Point Cloud Data." In Springer Series in Design and Innovation, 271–80. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04640-7_28.

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Panati, Manikanta. "Meet KeystoneJS." In Beginning KeystoneJS, 1–12. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9_1.

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Panati, Manikanta. "Using Template Engines." In Beginning KeystoneJS, 123–32. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9_10.

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Panati, Manikanta. "Deploying to Ubuntu Cloud Server." In Beginning KeystoneJS, 133–42. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9_11.

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Panati, Manikanta. "Building the IncTicket Application." In Beginning KeystoneJS, 13–42. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9_2.

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Panati, Manikanta. "Introducing KeystoneJS Models." In Beginning KeystoneJS, 43–53. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2547-9_3.

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Conference papers on the topic "Keystones"

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Przybylowicz, Edwin P. "Strategic intent and architecture: keystones for international competitiveness." In Rochester - DL tentative, edited by Ernest Sternberg, Allen J. Krisiloff, and Roland R. Schindler. SPIE, 1992. http://dx.doi.org/10.1117/12.58903.

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Saint-Nom, Roxana. "Keystones of a Speaker Verification R&D Group." In 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/icassp.2007.366776.

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Malashenkov, D. C., V. A. Kurilov, L. Battocchio, F. Mazzucca, W. Pecorella, and F. Rossitto. "An inhabited base on Moon: keystones of strategy of development." In 57th International Astronautical Congress. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.iac-06-a5.1.05.

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Gan, Fuxi. "Development History of Laser Materials and Their Applications in China." In Solid State Lasers: Materials and Applications. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/sslma.1997.tua1.

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Since emergence of the first laser device — ruby laser, solid state lasers continue to occupy a prominent place among the different kinds of laser devices, which are widely used in industrial, medical, military and scientific fields. The laser materials are the research keystones for development of new solid state lasers. There are two kinds of solid state laser: light-pumped and electrically excited, the latter ones are semiconductor lasers. As the preparation of semiconductor laser materials — semiconductor thin films always ties with laser devices, hence, in this paper we discuss mainly the light-pumped and ion-activated solid state materials, in which the author had long been engaged.
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Hacks, Alexander, Sebastian Schuster, Hans Josef Dohmen, Friedrich-Karl Benra, and Dieter Brillert. "Turbomachine Design for Supercritical Carbon Dioxide Within the sCO2-HeRo.EU Project." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75154.

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The paper aims to give an overview over the keystones of design of the turbomachine for a supercritical CO2 (sCO2) Brayton cycle. The described turbomachine is developed as part of a demonstration cycle on a laboratory scale with a low through flow. Therefore the turbomachine is small and operates at high rotational speed. To give an overview on the development the paper is divided into two parts regarding the aerodynamic and mechanical design. The aerodynamic design includes a detailed description on the steps from choosing an appropriate rotational speed to the design of the compressor impeller. For setting the rotational speed the expected high windage losses are evaluated considering the reachable efficiencies of the compressor. The final impeller design includes a description of the blading development together with the final geometry parameters and calculated performance. The mechanical analysis shows the important considerations for building a turbomachine with integrated design of the three major components turbine, alternator and compressor (TAC). It includes different manufacturing techniques of the impellers, the bearing strategy, the sealing components and the cooling of the generator utilising the compressor leakage. Concluding the final design of the TAC is shown and future work on the machine is introduced.
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ALEKSEJEVA, Ludmila, Viktorija ŠIPILOVA, Elita JERMOLAJEVA, Inta OSTROVSKA, and Dmitrijs OĻEHNOVIČS. "SMART GROWTH IN LATGALE REGION OF LATVIA: AN OVERVIEW OF MULTIPLE-HELIX ACTORS." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.165.

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Within the framework of the Latvian National Programme EKOSOC-LV this paper focuses on the smart growth as a tool for regional development. The research aim is to evaluate the factors that influence the formation of a smart territory and to estimate interconnections of quantitative indicators and expert opinions. The present study reflects the quantitative and qualitative assessment of smart growth challenges in the region of Latgale (Latvia) on the level of 19 districts. One of the most important aspects of the implementation of the concept of smart specialization is the participation of all involved actors; thus, one of the solutions of smart growth evaluation is the multiple helix approach. By analysing and summarizing the aspects affecting smart territories, based on the theoretical principles, regional stakeholder’s (local governments, entrepreneurs, representatives of communities, scientists, general public) recommendations, taking into account the national strategic settings and the views of the EKOSOC-LV working group, smart growth index was developed as well as factor hierarchy of the smart territory formation and growth, on the basis of which the Analytic Hierarchy Process method was realized. Logical construction, monographic, analytic hierarchy process, statistical analysis methods are used for research. The quantitative assessment is based on integrated index (Smart Development Index) establishment and testing. The qualitative assessment is based on the regional expert opinions summarized by the Analytic Hierarchy Process methodology. Complex analysis of the obtained quantitative indicators highlights the People and Resources dimension, but qualitative assessment underlines People and Economy dimensions as the keystones of the smart specialization of the Latgale region. The integrated application of quantitative and qualitative approaches allows a comprehensive assessment of the smart growth process in the Latgale region and its districts.
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Lee, Dayeol, David Kohlbrenner, Shweta Shinde, Krste Asanović, and Dawn Song. "Keystone." In EuroSys '20: Fifteenth EuroSys Conference 2020. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3342195.3387532.

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Sitaram, Dinkar, H. L. Phalachandra, Anush Vishwanath, Pramod Ramesh, Meghana Prashanth, Akshay G. Joshi, Anoop R. Desai, et al. "Keystone federated security." In 2013 IEEE Third International Conference on Information Science and Technology (ICIST). IEEE, 2013. http://dx.doi.org/10.1109/icist.2013.6747634.

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Sitaram, Dinkar, H. L. Phalachandra, Anush Vishwanath, Pramod Ramesh, Meghana Prashanth, Akshay G. Joshi, Anoop R. Desai, et al. "Keystone federated security." In 2013 8th International Conference for Internet Technology and Secured Transactions (ICITST). IEEE, 2013. http://dx.doi.org/10.1109/icitst.2013.6750285.

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Dick, Kevin, Joshua B. Tanner, and James R. Green. "To Keystone or Not to Keystone, that is the Correction." In 2021 18th Conference on Robots and Vision (CRV). IEEE, 2021. http://dx.doi.org/10.1109/crv52889.2021.00027.

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Reports on the topic "Keystones"

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Dufek, Eric, Jun Liu, and Yi Cui. Progress Report-Keystone 3. Office of Scientific and Technical Information (OSTI), May 2017. http://dx.doi.org/10.2172/1483801.

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Li, Yi. Keystone Solar Future Project FTR. Office of Scientific and Technical Information (OSTI), August 2021. http://dx.doi.org/10.2172/1813448.

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KEYSTONE CENTER CO. The Keystone Center's 1992 Scientist to Scientist Colloquium Held at Keystone, Colorado on 15-20 August 1992. Fort Belvoir, VA: Defense Technical Information Center, August 1992. http://dx.doi.org/10.21236/ada298950.

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KEYSTONE CENTER CO. The Keystone Center's Scientist to Scientist Colloquium Proceedings Held in Keystone, Colorado, on 14-19 August, 1994. Fort Belvoir, VA: Defense Technical Information Center, March 1995. http://dx.doi.org/10.21236/ada299803.

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Sirinides, Phil, John Fantuzzo, Whitney LeBoeuf, Katie Barghaus, and Ryan Fink. An Inquiry into Pennsylvania’s Keystone STARS: Research Report. Consortium for Policy Research in Education, November 2015. http://dx.doi.org/10.12698/cpre.2015.keystonestars.

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Sahla, M., L. Kurvinen, and A. Ruuskanen. Historical environmental measurements reveal drastic decrease on Baltic Sea keystone species. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2017. http://dx.doi.org/10.4095/305922.

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Wilder, Elisabeth. "Game Over" for the Climate: The Keystone XL Pipeline on TV News. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1437.

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KEYSTONE CENTER CO. Keystone National Policy Dialogue on Department of the Navy Hazardous Waste Management. Fort Belvoir, VA: Defense Technical Information Center, March 1991. http://dx.doi.org/10.21236/ada236322.

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Taylor, Jimmy D., Greg K. Yarrow, and James E. Miller. Beavers. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, March 2017. http://dx.doi.org/10.32747/2017.7207729.ws.

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The American beaver (Castor canadensis) is known as an “ecosystem engineer” because of the benefits their dams provide to biological diversity and ecosystem function. It also is considered a “keystone species” because of its ability to transform its environment, creating new habitats upon which other species depend. Despite the many positive benefits beavers provide through foraging and dam building, beavers also create conflict with people when their activities cause damage. The focus of this publication is to provide basic information on beaver ecology, damage, and management.
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Ків, Арнольд Юхимович, Володимир Миколайович Соловйов, and Sergey A. Tomilin. Formation of Si precipitates іn neutron irradiated Al. Видавничий відділ КДПУ, 2001. http://dx.doi.org/10.31812/0564/1027.

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Transmutation reactions are the unique way to get a large concentration of Silicon atoms in Aluminum lattice, and just in substitutional positions. Appearing Silicon atoms in Aluminum lattice instead of Aluminum atoms leads to arising of mechanical stresses. This factor is the keystone of the model, which allows to explain the main peculiarities of Si precipitate creation in Aluminum irradiated by thermal neutrons. First, we shall describe the qualitative peculiarities of the model. Then we shall perform some quantitative estimates. At last the model will be discussed and compared with experimental data.
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