Relevant bibliographies by topics / Propagace a distribuce

Contents

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

Academic literature on the topic 'Propagace a distribuce'

Author: Grafiati
Published: 28 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Propagace a distribuce"

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Zhang, Bo, Lian Jin Tao, Wen Pei Wang, and Ji Dong Li. "Research on the Vibration Attenuation Rules and Wave Propagation Law under Impacting Drill on the Deep Soil Layer." Advanced Materials Research 250-253 (May 2011): 1971–77. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1971.

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A field test is carried out to study the effect of vibration while treating foundation using vibroflotation method in the deep soil layer in Zhengzhou, China. The vibration attenuation rules and wave propagation rules in different formations caused by different numbers of drills are analyzed. Evaluate the influence on the adjacent buildings. The result shows that the vibration will be generated in foundation obviously in the process of construction using the method. Vibration force, impact frequency and site soil are important influence factors on ground vibration attenuation. The analysis reveals that the maximum vertical acceleration attenuation velocity was much greater in near area than that in the relative far area. The waves caused by vibration propagate in two ways: (1) surface wave is generated on the wall of drill hole and propagated to the ground surface, and attenuated in a certain distance (<8m); (2) shear wave was generated and propagated in the impacting formation and attenuated from the deep formation to the ground surface. Vibration amplitude is mainly distributed in the low frequency range in the areas which far away from vibration source and in the silt layer near the ground surface.
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Das, Nirmali Prabha, Dorina G. Dobó, Dániel Berkesi, Ákos Kukovecz, Dezső Horváth, and Ágota Tóth. "Directional coupling in spatially distributed nanoreactors." RSC Advances 9, no. 69 (2019): 40745–49. http://dx.doi.org/10.1039/c9ra09758a.

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Perez-Mongiovi, D., P. Chang, and E. Houliston. "A propagated wave of MPF activation accompanies surface contraction waves at first mitosis in Xenopus." Journal of Cell Science 111, no. 3 (February 1, 1998): 385–93. http://dx.doi.org/10.1242/jcs.111.3.385.

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During the period of mitosis, two surface contraction waves (SCWs) progress from the animal to vegetal poles of the Xenopus egg. It has been shown that these SCWs occur in parallel with the activation of MPF and with its subsequent inactivation in the animal and vegetal hemispheres, suggesting that they are responses to propagated waves of MPF activity across the egg. We have analysed the mechanism of MPF regulation in different regions of the egg in detail in relation to SCW progression. The distributions of histone HI kinase activity and of Cdc2 and cyclin B (the catalytic and regulatory subunits of MPF) were followed by dissection of intact eggs following freezing and in cultured fragments separated by ligation. Cdc2 was found to be distributed evenly throughout the egg cytoplasm. Loss of phosphorylated (inactive) forms of Cdc2 coincided spatially with the wave of MPF activation, while cyclin B2 accumulation occurred in parallel in animal and vegetal regions. In ligated vegetal pole fragments no MPF activation or Cdc2 dephosphorylation were detectable. A wave of cyclin B destruction that occurred in concert with the second SCW was also blocked. Taken together these results indicate that the triggering mechanism for MPF activation requires components specific to the animal cytoplasm, acting via Cdc2 dephosphorylation, and that MPF activation subsequently propagates autocatalytically across the egg. SCW progression in the vegetal hemisphere was followed directly by time-lapse videomicroscopy of subcortical mitochondrial islands. The first SCW traversed the vegetal pole at the time of MPF activation in this region. Like MPF activation and inactivation, SCWs were blocked in the vegetal region by ligation. These observations reinforce the hypothesis that the first SCW is a direct consequence of the MPF activation wave. It may reflect depolymerisation of the subcortical microtubule network since it coincided exactly with the arrest of the microtubule-dependent movement of ‘cortical rotation’ and was related in direction in most eggs. The cyclin B destruction wave and associated cortical contraction of the second SCW may be localised downstream consequences of the MPF activation wave, or they may propagate independently from the animal cytoplasm.
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Rodríguez-Ocampo, Paola E., Jassiel V. H. Fontes, Michael Ring, Edgar Mendoza, and Rodolfo Silva. "A CFD Numerical Study to Evaluate the Effect of Deck Roughness and Length on Shipping Water Loading." Water 13, no. 15 (July 29, 2021): 2063. http://dx.doi.org/10.3390/w13152063.

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Shipping water events that propagate over the decks of marine structures can generate significant loads on them. As the configuration of the structure may affect the loading behaviour, investigation of shipping water loads in different structural conditions is required. This paper presents a numerical investigation of the effect of deck roughness and deck length on vertical and horizontal loads caused by shipping water on a fixed structure. Systematic analyses were carried out of isolated shipping water events generated with the wet dam-break method and simulated with OpenFoam Computational Fluid Dynamics toolbox. The numerical approach was validated and then the shipping water loads were examined. It was found that, as roughness increased, the maximum vertical and horizontal loads showed a delay. As the deck length reduced, the vertical backflow loads tended to increase. These results suggest it may be worthwhile examining the behaviour of shipping water as it propagates over rough surfaces caused by fouling, corrosion, or those with small structural elements distributed on them. Moreover, the effect of deck length is important in understanding the order of magnitude of loads on structures with variable deck lengths, and those which have forward and backflow loading stages.
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Kimura, K., K. I. Inoue, Y. Kuroiwa, F. Tanaka, and M. Takada. "Propagated but topologically distributed forebrain neurons expressing alpha-synuclein in aged macaques." Journal of the Neurological Sciences 381 (October 2017): 179. http://dx.doi.org/10.1016/j.jns.2017.08.518.

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Kimura, Katsuo, Ken-ichi Inoue, Yoshiyuki Kuroiwa, Fumiaki Tanaka, and Masahiko Takada. "Propagated but Topologically Distributed Forebrain Neurons Expressing Alpha-Synuclein in Aged Macaques." PLOS ONE 11, no. 11 (November 18, 2016): e0166861. http://dx.doi.org/10.1371/journal.pone.0166861.

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Jetti, Harsha Vardhana, and Simona Salicone. "A Possibilistic Kalman Filter for the Reduction of the Final Measurement Uncertainty, in Presence of Unknown Systematic Errors." Metrology 1, no. 1 (August 17, 2021): 39–51. http://dx.doi.org/10.3390/metrology1010003.

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A Kalman filter is a concept that has been in existence for decades now and it is widely used in numerous areas. It provides a prediction of the system states as well as the uncertainty associated to it. The original Kalman filter can not propagate uncertainty in a correct way when the variables are not distributed normally or when there is a correlation in the measurements or when there is a systematic error in the measurements. For these reasons, there have been numerous variations of the original Kalman filter, most of them mathematically based (like the original one) on the theory of probability. Some of the variations indeed introduce some improvements, but without being completely successful. To deal with these problems, more recently, Kalman filters have also been defined using random-fuzzy variables (RFVs). These filters are capable of also propagating distributions that are not normal and propagating systematic contributions to uncertainty, thus providing the overall measurement uncertainty associated to the state predictions. In this paper, the authors make another step forward, by defining a possibilistic Kalman filter using random-fuzzy variables which not only considers and propagates both random and systematic contributions to uncertainty, but also reduces the overall uncertainty associated to the state predictions by compensating for the unknown residual systematic contributions.
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Wu, Si, Danmei Chen, Mahesan Niranjan, and Shun-ichi Amari. "Sequential Bayesian Decoding with a Population of Neurons." Neural Computation 15, no. 5 (May 1, 2003): 993–1012. http://dx.doi.org/10.1162/089976603765202631.

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Population coding is a simplified model of distributed information processing in the brain. This study investigates the performance and implementation of a sequential Bayesian decoding (SBD) paradigm in the framework of population coding. In the first step of decoding, when no prior knowledge is available, maximum likelihood inference is used; the result forms the prior knowledge of stimulus for the second step of decoding. Estimates are propagated sequentially to apply maximum a posteriori (MAP) decoding in which prior knowledge for any step is taken from estimates from the previous step. Not only do we analyze the performance of SBD, obtaining the optimal form of prior knowledge that achieves the best estimation result, but we also investigate its possible biological realization, in the sense that all operations are performed by the dynamics of a recurrent network. In order to achieve MAP, a crucial point is to identify a mechanism that propagates prior knowledge. We find that this could be achieved by short-term adaptation of network weights according to the Hebbian learning rule. Simulation results on both constant and time-varying stimulus support the analysis.
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Butz, Martin V., Martin Pelikan, Xavier Llorà, and David E. Goldberg. "Automated Global Structure Extraction for Effective Local Building Block Processing in XCS." Evolutionary Computation 14, no. 3 (September 2006): 345–80. http://dx.doi.org/10.1162/evco.2006.14.3.345.

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Learning Classifier Systems (LCSs), such as the accuracy-based XCS, evolve distributed problem solutions represented by a population of rules. During evolution, features are specialized, propagated, and recombined to provide increasingly accurate subsolutions. Recently, it was shown that, as in conventional genetic algorithms (GAs), some problems require efficient processing of subsets of features to find problem solutions efficiently. In such problems, standard variation operators of genetic and evolutionary algorithms used in LCSs suffer from potential disruption of groups of interacting features, resulting in poor performance. This paper introduces efficient crossover operators to XCS by incorporating techniques derived from competent GAs: the extended compact GA (ECGA) and the Bayesian optimization algorithm (BOA). Instead of simple crossover operators such as uniform crossover or one-point crossover, ECGA or BOA-derived mechanisms are used to build a probabilistic model of the global population and to generate offspring classifiers locally using the model. Several offspring generation variations are introduced and evaluated. The results show that it is possible to achieve performance similar to runs with an informed crossover operator that is specifically designed to yield ideal problem-dependent exploration, exploiting provided problem structure information. Thus, we create the first competent LCSs, XCS/ECGA and XCS/BOA, that detect dependency structures online and propagate corresponding lower-level dependency structures effectively without any information about these structures given in advance.
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Gower, Artur L., I. David Abrahams, and William J. Parnell. "A proof that multiple waves propagate in ensemble-averaged particulate materials." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475, no. 2229 (September 2019): 20190344. http://dx.doi.org/10.1098/rspa.2019.0344.

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Effective medium theory aims to describe a complex inhomogeneous material in terms of a few important macroscopic parameters. To characterize wave propagation through an inhomogeneous material, the most crucial parameter is the effective wavenumber . For this reason, there are many published studies on how to calculate a single effective wavenumber. Here, we present a proof that there does not exist a unique effective wavenumber; instead, there are an infinite number of such (complex) wavenumbers. We show that in most parameter regimes only a small number of these effective wavenumbers make a significant contribution to the wave field. However, to accurately calculate the reflection and transmission coefficients, a large number of the (highly attenuating) effective waves is required. For clarity, we present results for scalar (acoustic) waves for a two-dimensional material filled (over a half-space) with randomly distributed circular cylindrical inclusions. We calculate the effective medium by ensemble averaging over all possible inhomogeneities. The proof is based on the application of the Wiener–Hopf technique and makes no assumption on the wavelength, particle boundary conditions/size or volume fraction. This technique provides a simple formula for the reflection coefficient, which can be explicitly evaluated for monopole scatterers. We compare results with an alternative numerical matching method.
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Dissertations / Theses on the topic "Propagace a distribuce"

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Šťáva, Zdeněk. "Trendy v oblasti propagace a distribuce hudebních děl." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-150383.

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This thesis is devoted to an analysis of trends in promotion and distribution of musical works. The theoretical part of the thesis deals with the marketing mix, customer behavior, the definition of creative industries and copyright protection. The practical part describes the history and development of the music industry and the structure of music label, presentation opportunities, promotion and distribution of music recordings and music groups. The work also includes marketing research dealing with the sale of music recordings in the Czech Republic. Based on the results of research and analysis of other data it is trying to predict trends in the music industry. The aim of the work is the formulation of specific recommendations on how musical recordings offer to target customers and to refute some claims about transfer music recordings to the edge of the interests of consumers.
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Koubová, Monika Bc. "Uplatnění marketingového řízení v podniku FOPO II, s.r.o." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-165172.

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V teoretické části se práce zaměřuje na podklady sloužící pro analýzu marketingového řízení. Společnost FOPO II., s.r.o. je autorizovaný dealer značky FORD s hlavním sídlem v Počátkách. V praktické části jsou popsány jednotlivé fáze marketingového řízení a jednotlivé nástroje marketingového mixu. V závěrečné části práce jsem zhodnotila marketingové řízení a využívání jednotlivých nástrojů marketingového mixu a navrhla jsem zlepšující opatření do budoucna.
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Tabery, Alice. "Francouzské filmy a jejich distribuce v České republice." Master's thesis, Akademie múzických umění v Praze.Filmová a televizní fakulta. Knihovna, 2012. http://www.nusl.cz/ntk/nusl-156010.

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This thesis is devoted to French films and their distribution in Czech cinemas, on DVD or on television channels in last ten years. It describes their production and promotion, the system of subsidies from the French National Film Center (CNC) and the organisation Unfrance Films. This thesis further analyses the situation on Czech film market and the position of French cinematography in our country from the nineties to the present. This is accompanied by a list of French films released between 2002 and 2011. The work also focuses on Czech distributors presenting French films. An example of one such case is brought in by a case study on presenting of the film Mammoth. The work analyses conditions determining the current position of French films towards their competition and it follows reception and success they received in Czech Republic.
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Bäumel, Michael. "Marketingový mix vybrané společnosti." Master's thesis, Česká zemědělská univerzita v Praze, 2017. http://www.nusl.cz/ntk/nusl-262986.

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In my thesis, I will entertain analysis of the company's marketing mix Wellness Trade, s.r.o, which deals with the sale and production of private and public wellness products. Marketing mix is a summary of the basic marketing tools and forms an integral part of the business. Entities use the marketing mix to achieve their goals. The theoretical part will be engaged in a description of components of the marketing mix, especially 4P. In the practical part I shall deal with the analysis of the marketing mix of the company subsequent to the evaluation and recommendation of actions for the next year.
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Šmok, Daniel. "Návrh na zlepšení účinnosti prvků marketingového mixu ve společnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2009. http://www.nusl.cz/ntk/nusl-222137.

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The aim of the thesis is the analysis of current marketing mix and definition of proposals for new marketing mix formulation. The theoretical part discusses different marketing mix conceptions and describes its individual components. The practical part focuses on evaluation of marketing mix in the analysed company. The final part proposes solutions for improvement of efficiency of marketing mix factors.
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Svobodová, Denisa. "Návrh zlepšení marketingového mixu provozovny Ráj hadic." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2015. http://www.nusl.cz/ntk/nusl-225305.

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Diploma work deals with assessment of present usage of marketing mix instruments and subsequently setting of improving proposals of marketing mix of the shop Ráj hadic. This proceeding should increase awareness of customers about the shop and by that to raise a number of the customers and intentsity of its marketing activities.
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Štefanová, Michaela. "Návrh marketingového mixu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-317057.

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Thesis is focused on compilation of proposals to introduce new marketing mix of Slavkovský pivovar company. Based on performed marketing analysis, there is introduced a plan of marketing mix, which is aimed at increasing of competitiveness, sales and customer awareness and satisfaction.
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Vidlák, Vojtěch. "Návrh marketingových aktivit pro rozšíření regionálního produktu v konkrétním regionu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-318333.

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The diploma thesis deals with proposals of appropriate marketing activities for the company Dalešické cukrářství that are aiming to expand the product in a particular region. The results of these proposals should increase the brand awareness and the growth of sales. The proposals are build on results of analyzes based on theoretical knowledge.
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Řezníček, Michal. "Marketingový mix podniku." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2020. http://www.nusl.cz/ntk/nusl-416846.

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This Master´s thesis deals with the marketing mix of the company. My thesis is divided into three parts - theoretical, analytical and proposal part. The theoretical part focuses on explanation of basic concepts related to my work. The analytical part is about the introduction of the company and analysis of individual methods of marketing mix. Based on the analysis, various proposals are suggested to improve the marketing mix and to raise the brand awareness for the products of the company.
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Čupka, Martin. "Technologický pokrok a jeho dopady na hudobný priemysel." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-193295.

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This thesis deals with positive and negative effects of technological progress on the music industry. The first part presents important changes during the evolution of the music industry to its current status. Other chapters are trying to analyze current trends and their specific features in the field of production, distribution and promotion of music in the world and the Czech Republic. Special chapter is devoted to new forms of financing music project. The work also deals with the analysis of the current music consumption habits of music consumers in the Czech Republic and Slovakia. The last chapter deals with the approach of Czech and Slovak musicians to new possibilities in production, distribution, promotion and fundraising for the functioning of their musical projects. Key words:
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Books on the topic "Propagace a distribuce"

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Król, Dariusz. Wybrane metody propagacji danych w systemach rozproszonych: Selected data propagation methods in distributed systems. Wrocław: Oficyna Wydawnicza Politechniki Wrocławskiej, 2012.

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V, Paulina Hechenleitner. Plantas amenazadas del Centro-Sur de Chile: Distribucio n, conservacio n y propagacio n. 2nd ed. [s.l.]: Universidad Austral de Chile y Real Jardin Bota nico de Edimburgo, 2005.

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Book chapters on the topic "Propagace a distribuce"

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Asai, Yoshiyuki, and Alessandro E. P. Villa. "Distributed Deterministic Temporal Information Propagated by Feedforward Neural Networks." In Lecture Notes in Computer Science, 258–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21735-7_32.

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Park, Mi-Ryong, Dongwon Kim, and Sang-Ha Kim. "A Simple SNR Based Linear Back-Off to Propagate Multi-hop Emergency Messages on the Distributed VANETs." In Communications in Computer and Information Science, 34–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35248-5_6.

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Gomes de Andrade, Fabio, Fábio Luiz Leite, and Cláudio de Souza Baptista. "Using Distributed Semantic Catalogs for Information Discovery on Spatial Data Infrastructures." In Advances in Geospatial Technologies, 118–38. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-192-8.ch006.

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Spatial data sharing among both private and public organizations is an old issue. Spatial Data Infrastructures (SDIs) have been proposed to solve data integration and discovery problems. Nonetheless, they can only partially work out these problems, as most of their catalog services are built on keyword based search. This approach always results in low precision on searching results. One of the greatest challenges in spatial integration is to provide the semantics for underlying data and services. This chapter describes a distributed catalog service that uses ontologies to describe underlying information so as to improve searching precision. The proposed catalog service can rewrite and propagate queries to other distributed catalogs to cooperate and exchange information directly without the traditional problems imposed by a centralized architecture.
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Mok, Jeffrey. "Social and Distributed Cognition in Collaborative Learning Contexts." In Social Computing, 1838–54. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-984-7.ch121.

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Technological artifacts such as computers and mobile electronic devices have dramatically increased our learning interactions with machines. Coupled with the increasingly different forms of collaborative learning situations, our contemporary learning environments have become more complex and interconnected in today’s information age. How do we understand the learning and collaborative processes in such environments? How do members receive, analyze, synthesize, and propagate information in crowded systems? How do we investigate the collaborative processes in an increasingly sophisticated learning environment? What is collaboration in the current technological age? This chapter, using the conceptual framework of distributed and social cognition, will seek to answer these questions. It will describe the current perspectives on social and distributed cognition in the context of learning, and examine how these theories can inform the processes of collaborative learning with computers. The chapter will conclude with implications to our learning environments today.
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Pucciani, Gianni, Flavia Donno, Andrea Domenici, and Heinz Stockinger. "Consistency of Replicated Datasets in Grid Computing." In Handbook of Research on Grid Technologies and Utility Computing, 49–58. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-184-1.ch006.

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Data replication is a well-known technique used in distributed systems in order to improve fault tolerance and make data access faster. Several copies of a dataset are created and placed at different nodes, so that users can access the replica closest to them, and at the same time the data access load is distributed among the replicas. In today’s Grid middleware solutions, data management services allow users to replicate datasets (i.e., flat files or databases) among storage elements within a Grid, but replicas are often considered read-only because of the absence of mechanisms able to propagate updates and enforce replica consistency. This entry analyzes the replica consistency problem and provides hints for the development of a Replica Consistency Service, highlighting the main issues and pros and cons of several approaches.
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Inouye, Melissa Wei-Tsing. "A Religious Rhetoric of Competing Modernities." In Reshaping the Boundaries. Hong Kong University Press, 2017. http://dx.doi.org/10.5790/hongkong/9789888390557.003.0008.

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This chapter examines the complicated notions of modernity propagated through the flourishing Christian print culture in late Qing and early Republican China. Western missionaries had introduced modern print technology to China in the first half of the nineteenth century. This technology was not only a symbol of the scientific ethos of rationalistic modernity, but also a convenient and widely utilized tool for propagating charismatic Christian practices, as seen in the Church News, the Chinese Christian Intelligencer, and other nationally distributed Christian publications. The coexistence of technological advancements and supernatural experiences gave rise to a paradoxical in-between situation, where multiple expressions of modernity could be attached to both old and new ideas frequently crossing the borders of cultural, religious, and material entities.
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Yu, Dongjin. "Message-Based Approach to Master Data Synchronization among Autonomous Information Systems." In Enterprise Information Systems and Advancing Business Solutions, 194–209. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1761-2.ch011.

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The evolution of networks and large scale information systems has led to the rise of data sources that are distributed, heterogeneous, and autonomous. As a result, the management of Master Data becomes more complex and of uncertain quality. This paper presents a novel message-based approach to the synchronization of Master Data among multiple autonomous information systems. Different than traditional approaches based on database triggers, the author adopts the optimistic bidirectional strategy with the process of two synchronization phases. By means of data service buses, it propagates synchronized Master Data through messages being passed along star-like cascading routes. Moreover, this approach could resolve possible data conflicts automatically using predefined attribute confidences and deducible current value confidences respectively. Finally, this paper presents the real case about synchronizing datasets among four separate but related systems based on the author’s novel message-based approach.
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Funder, John W. "Hormones and receptors: fundamental considerations." In Oxford Textbook of Endocrinology and Diabetes, 24–28. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199235292.003.1022.

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The original endocrine physiologists viewed hormones as responses to homoeostatic challenge, any signal a call to arms; the word is thus derived from the classical Greek ωρμαειν‎—‘to arouse’. In the twenty-first century a hormone is a molecule—small or large, protein or lipid—secreted in a regulated fashion from one organ and acting on another. The definition is firmly based on the anatomy of the seventeenth century, the histology of the nineteenth, and the physiology of the twentieth. It has been shaped by convention and clinical specialization: gut hormones are the marches between endocrinology and gastroenterology, and the adrenal medulla the territory of the cardiovascular physician. It has been refined by concepts of paracrine—where the secretion of one cell type in a tissue acts on another cell type in the same tissue—and autocrine, where a particular cell type both secretes and responds to a particular signal. Inherent in the concepts of paracrine and autocrine are that the signal is not secreted into blood or lymph, to be distributed more or less throughout the body, but is made locally to act locally. A very good example of a signalling system with both paracrine and autocrine activities is the neuronal synapse. Inherent in the concept of the signal is that of a receptor: a signal without a receptor is the sound of one hand clapping. Inherent in the concept of a receptor are two functions: that of being able to discriminate between different signals, and to propagate the signal by activating cell membrane or intracellular signal transduction pathways. Discrimination by a receptor between different circulating potential signals is, in the first instance, a function of the likelihood of a particular signal being able to interact with the receptor, for a period of time sufficient to alter the confirmation of the receptor and thus to trigger propagation. This interaction is commonly referred to as binding, and thus the circulating hormone as a ligand (that which is bound). If the structures of ligand and receptors are such that the initial interaction is followed by formation of strong intermolecular bonds between the two, lessening the possibility of dissociation and the receptor returning to an unliganded state, the receptor is said to have high affinity for the ligand (and vice versa). If the binding is followed by propagation of the ‘appropriate’ signal the ligand is classified as an agonist, or active hormone; if a molecule occupies the binding site on the receptor but does not so alter its structure as to propagate a signal, it is classified as a hormone antagonist (and often, by extension, a receptor antagonist). In the past couple of decades, the concepts of ‘agonist’ and ‘antagonist’ have needed to be refined, as noted subsequently in this chapter.
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Conference papers on the topic "Propagace a distribuce"

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Drawel, Nagat, Jamal Bentahar, Amine Laarej, and Gaith Rjoub. "Formalizing Group and Propagated Trust in Multi-Agent Systems." In Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California: International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/9.

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We present a formal framework that allows individual and group of agents to reason about their trust toward other agents. In particular, we propose a branching time temporal logic BT which includes operators that express concepts such as everyone trust, distributed trust and propagated trust. We analyze the satisfiability and model checking problems of this logic using a reduction technique.
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Pahng, Gun-Dong F., Seockhoon Bae, and David Wallace. "Web-Based Collaborative Design Modeling and Decision Support." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/eim-5681.

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Abstract This paper presents an integrated but open product development environment for distributed and collaborative design. The web-based framework, called DOME, allows designers to build integrated models using both local and distributed resources and to collaborate by exchanging services. Thus, an integrated model can be created while each participant focuses on their own area of expertise. A design model is created by connecting modules, each of which can represent specific components, analysis capabilities/software, disciplines, or organizations relevant to the problem. The modules interact with each other using service exchanges based upon the CORBA standard communication protocol for distributed objects. The resulting module network forms a concurrent model in which changes propagate through service exchanges. Modules can simultaneously function as both clients (using services from other modules) and servers (providing services to other modules). A Java applet-based user interface provides cross-platform and distributed user access to DOME module servers throughout the network.
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Behbahani-Nejad, M., and N. C. Perkins. "Forced Wave Propagation in Elastic Cables With Small Curvature." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0548.

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Abstract This study presents an investigation of the coupled longitudinal-transverse waves that propagate along an elastic cable. The coupling considered derives from the equilibrium curvature (sag) of the cable. A mathematical model is presented that describes the three-dimensional nonlinear response of a long elastic cable. An asymptotic form of this model is derived for the linear response of cables having small equilibrium curvature. Linear in-plane response is described by coupled longitudinal-transverse partial differential equations of motion, which are comprehensively evaluated herein. The spectral relation governing propagating waves is derived using transform methods. In the spectral relation, three qualitatively distinct frequency regimes exist that are separated by two cut-off frequencies. This relation is employed in deriving a Green’s function which is then used to construct solutions for in-plane response under arbitrarily distributed harmonic excitation. Analysis of forced response reveals the existence of two types of periodic waves which propagate through the cable, one characterizing extension-compressive deformations (rod-type) and the other characterizing transverse deformations (string-type). These waves may propagate or attenuate depending on wave frequency. The propagation and attenuation of both wave types are highlighted through solutions for an infinite cable subjected to a concentrated harmonic excitation source.
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Devendorf, Erich, and Kemper Lewis. "Examining Interactions Between Solution Architecture and Designer Mistakes." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28872.

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When designing complex systems, it is often the case that a design process is subjected to a variety of unexpected inputs, interruptions, and changes. These disturbances can create unintended consequences including changes to the design process architecture, the planned design responsibilities, or the design objectives and requirements. In this paper a specific type of design disturbance, mistakes, is investigated. The impact of mistakes on the convergence time of a distributed multi-subsystem optimization problem is studied for several solution process architectures. A five subsystem case study is used to help understand the ability of certain architectures to handle the impact of the mistakes. These observations have led to the hypothesis that selecting distributed design architectures that minimize the number of iterations to propagate mistakes can significantly reduce their impact. It is also observed that design architectures that converge quickly tend to have these same error damping properties. Considering these observations when selecting distributed design architectures can passively reduce the impact of mistakes.
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Ferna´ndez, Marco Gero, David W. Rosen, Janet K. Allen, and Farrokh Mistree. "Digital Interfaces: The Key to Effective Decision-Making in Distributed Collaborative Design and Manufacturing." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/cie-34466.

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In product development, the interfaces between distinct phases of a design process are not well defined and largely misunderstood. The same ambiguity holds true for interactions among distributed stakeholders engaged in shared, concurrent design tasks. Such vagueness fosters poor communication, problematic changeovers, and hard-to-manufacture designs. Resulting design processes tend to be iterative and not only increase product development costs and extend time-to-market, but also ultimately impede collaboration. What is needed is the ability to propagate decision-critical, up-to-date information alongside design knowledge for both sequential and concurrent design tasks. This is particularly important for dependent and interdependent decisions that cannot be made in isolation. To address this need, digital interfaces are being developed as key components to successful collaboration in distributed design and manufacture applications. Such digital interfaces will constitute a means of communicating critical information and will address the need for allocating responsibility for decisions. The potential implementation of a digital interface is illustrated in an example focusing on the production of a functional prototype of a disposable camera spool.
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Li, Yugang, and Christopher D. Rahn. "Adaptive Vibration Isolation for Axially Moving Beams." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8302.

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Abstract Manufacture and use of metal bands, sheets, and cables often requires high-speed axial transport of the material. Disturbance forces can cause vibration to propagate through the process due to the bending stiffness coupling between adjacent roller-supported spans. This paper introduces an active pivoting roller that adaptively decouples adjacent spans, thereby isolating a controlled span from bounded disturbances in an adjacent span. The system includes a partial differential equation for the two spans and an ordinary differential equation for the actuator. Exact model knowledge and adaptive isolation controllers, based on Lyapunov theory, regulate the controlled span from bounded disturbances in the adjacent, uncontrolled span. Assuming distributed damping in the uncontrolled span, the exact model knowledge and adaptive controllers exponentially and asymptotically drive the controlled span displacement to zero, respectively, while ensuring bounded uncontrolled span displacement and control force.
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Jha, Krishna N., Gary Coen, Andrea Morris, Ed Mytych, and Judith Spering. "Agent Support for Design Manufacturability." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/dfm-5723.

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Abstract Designing manufacturable aircraft parts requires satisfying extensive manufacturability constraints early in the design phase, and to quickly propagate the design decisions to the multiple distributed design groups. We have built a multi-agent-based system to provide the desired manufacturability-constraints checking early in the design-process, coordination among the design and analysis groups, the legacy applications, and other resources during the preliminary design (PD) process. A variety of agents are used to model the various design and analysis functionalities. The agent-representation includes a formal representation of the task-structures. One of the agents generates a prototype process plan for the design, and checks the process plan against a repository of processing standards for the manufacturability of the design. A web-based user-interface provides high-level interface to the users. The agents collaborate to produce manufacturable designs.
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Yoshioka, Takeo, Shigeo Shimizu, and Hirokazu Shimoda. "A New Rolling Contact Damage of Deep Groove Ball Bearing Under Grease Lubrication." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44248.

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A new type of rolling contact damage was found out in the fatigue tests of the deep groove ball bearings #6206 under pure radial load and grease lubrication. In appearance, the damages had a few cracks at perpendicular to the ball revolution direction, sank about 20 μ m in the surface of rolling raceway, happened only in the raceway of stationary races and surface of balls, and distributed widely within loaded zone. And in the cross section there were a lot of cracks propagated at 60∼80 degrees to the rolling surface at not only damage position but also other parts. The cracks at the damage position just opened to the surface. It is supposed that the damages are caused by rolling contact fatigue and metal to metal contacts due to lubricant starvation under grease lubrication.
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Ziemer, Tim. "Towards a Lateral Line Sensor to Supplement Sonar in Shallow Water." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23624.

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Sonar provides vessels with a sensory system to detect and identify still and moving obstacles. In shallow water both active and passive sonar meet their limits. Acoustical methods exist, aiming at supporting sonar systems by means of digital signal processing, or, coming from the field of biomimetics, imitating echolocation principles of marine animals. This paper introduces a sensor system combining these approaches by the use of a vector sensor array applying Near-field Acoustical Holography (NAH) imitating the Lateral Line organ (LL) of fish; a passive method to supplement active and passive sonar. LL is able to localize obstacles due to their dipole-like water displacement by comparing low-frequency water accelerations distributed along the whole body. In contrast to pressure, accelerations are highly evanescent and do not propagate into the far-field. Thus LL does not suffer under reverberation or scattering. The performance of the proposed NAH-based LL-sensor is tested by a computer simulation of a source in absence and in presence of a disturbing source. The LL-sensor has proven to be more robust than pressure detection methods like beamforming and conventional NAH.
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Miorini, Rinaldo L., Huixuan Wu, and Joseph Katz. "The Internal Structure of the Tip Leakage Vortex Within the Rotor of an Axial Waterjet Pump." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23056.

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The complex flow field in the tip region of a turbomachine rotor, including the tip leakage flow and tip leakage vortex (TLV), has been studied for decades. Yet many associated phenomena are still not understood. This paper provides detailed data on the instantaneous and phase averaged inner structure of the tip flow, and evolution of the TLV. Observations are based on series of high resolution planar particle image velocimetry measurements performed in a transparent waterjet pump fitted into an optical refractive index matched test facility. Velocity distributions and turbulence statistics are obtained in several meridional planes inside the rotor. We observe that the instantaneous TLV structure is composed of several unsteady vortex filaments that propagate into the blade passage. These filaments are first embedded into a vortex sheet generated at the suction side of the blade tip, and then they wrap around each other and roll up into the TLV. These vortices do not have sufficient time to merge into a single compact structure within the blade passage. We also find that the leakage vortex induces flow separation at the casing endwall and entrains the casing boundary layer with its counter-rotating vorticity. As it propagates in the rotor passage, the TLV migrates towards the pressure side of the neighboring blade. Unsteadiness associated with observed vortical structures is also investigated. We notice that, at early stages of the TLV evolution, turbulence is elevated in the vortex sheet, in the flow entrained from the endwall, and near the vortex core. Interestingly, the turbulence observed around the core is not consistent with the local distribution of turbulent kinetic energy production rate. This mismatch indicates that, given a TLV section, production likely occurs at preceding stages of the vortex evolution. Then, the turbulence is convected to the core of the TLV, and we suggest that this transport has substantial component along the vortex. Because we observe that the meandering of vortex filaments dominate the flow in the passage, we decompose the unsteadiness surrounding the TLV core to contributions from interlaced vortices and broadband turbulence. Results of this decomposition show that the two contributions are of the same order of magnitude. The TLV is investigated also beyond the trailing edge of the rotor blade. During these late stages of its evolution, the TLV approaches the pressure side of the neighboring blade and vortex breakdown occurs, causing rapid broadening of the phase average core, with little change in overall circulation. Associated turbulence occupies almost half the width of the blade passage and turbulence production there is also broadly distributed. Proximity of the TLV to the pressure side of the neighboring blade also affects entrainment of flow into the incoming tip region.
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Reports on the topic "Propagace a distribuce"

1

The cassava seed system in Nigeria: Opportunities and challenges for policy and regulatory reform. International Potato Center, 2020. http://dx.doi.org/10.4160/23096586rtbwp20202.

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In many African countries south of the Sahara, farmers depend on the cultivation of vegetatively propagated crops (VPCs) for both consumption and commercial purposes. Yet yields for these crops remain at low levels due, in part, to the persistent use of low-quality planting material. Efforts to improve the quality of planting material exchanged in markets or through other channels are often hampered by the unique biological and economic characteristics of vegetative propagation—characteristics that distinguish VPCs from the major cereal crops that drive and shape the policy and investment choices made in many of these countries. This suggests that continued investment in new technologies and systems to produce, package, and distribute VPC planting materials will require customized policies and policy support if these systems are to supply farmers with quality planting material at any significant and sustained scale. This paper explores these issues in the context of the cassava seed system in Nigeria by drawing on (1) prior research, public policy documents, and government statistics; (2) key informant interviews and focus group discussions with seed system actors; and (3) a unique dataset from the 2015 Cassava Monitoring Survey of Nigeria (CMS). The paper examines the production and supply of cassava planting material, the influence of various quality assurance systems on production and supply, and the implications for smallholder farmers in Nigeria. We describe the market, non-market, and regulatory systems that shape the cassava seed market in Nigeria, focusing on effectiveness, influence, and reach. We then explore the ground realities—how farmers actually acquire and use cassava planting material—given the (weak) state of markets and regulation. This is followed by a discussion of alternative policy and regulatory approaches to managing and expanding the cassava seed system, emphasizing a more decentralized approach that prioritizes investment in innovative capacity at the community and enterprise levels.
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