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Relevant bibliographies by topics / Cluster formation

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Academic literature on the topic 'Cluster formation'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 June 2025

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Journal articles on the topic "Cluster formation"

1

Ahamad, Mohammed Gulam, Mohammed Faisal Ahmed, and Mohammed Yousuf Uddin. "Clustering as Data Mining Technique in Risk Factors Analysis of Diabetes, Hypertension and Obesity." European Journal of Engineering and Technology Research 1, no. 6 (2018): 88–93. http://dx.doi.org/10.24018/ejeng.2016.1.6.202.

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This investigation explores data mining using open source software WEKA in health care application. The cluster analysis technique is utilized to study the effects of diabetes, obesity and hypertension from the database obtained from Virginia school of Medicine. The simple k-means cluster techniques are adopted to form ten clusters which are clearly discernible to distinguish the differences among the risk factors such as diabetes, obesity and hypertension. Cluster formation was tried by trial and error method and also kept the SSE as low as possible. The SSE is low when numbers of clusters are more. Less than ten clusters formation unable to yield distinguishable information. In this work each cluster is revealing quit important information about the diabetes, obesity, hypertension and their interrelation. Cluster 0: Diabetes ? Obesity ? Hypertension = Healthy patient, Cluster 1: Diabetes ? Obesity ? Hypertension = Healthy patient, Cluster2: Diabetes ? Obesity ? Hypertension = Obesity, Cluster3: Diabetes ? Obesity ? Hypertension = Patients with Obesity and Hypertension, Cluster4: Boarder line Diabetes ? Obesity ? Hypertension = Sever obesity, Cluster5: Obesity ? Hyper tension ? Diabetes = Hypertension, Cluster6: Border line obese ? Border line hypertension ? Diabetes = No serious complications, Cluster 7: Obesity ? Hypertension ? Diabetes= Healthy patients, Cluster 8: Obesity ? Hypertension ? Diabetes= Healthy patients, and Cluster 9: Diabetes ? Hyper tension ? Obesity = High risk unhealthy patients.

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Larson, Richard B. "Galaxy Formation and Cluster Formation." Symposium - International Astronomical Union 126 (1988): 311–21. http://dx.doi.org/10.1017/s007418090004256x.

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A primary motivation for studying globular clusters is that, as the oldest known galactic fossils, they trace the earliest stages of galactic evolution; indeed, they may hold the key to understanding galaxy formation. Thus it is clearly of great importance to learn how to read the fossil record. To do this, we need to understand something about how the globular clusters themselves formed. Were they the first bound objects to form, or did they form in larger pre-existing systems of which they are just small surviving fragments? If the latter, what were the prehistoric cluster-forming systems like? And how did they manage to produce objects like globular clusters?

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M. Mampana, Kgwadi, Solly M. Seeletse, and Enoch M. Sithole. "Optimized consortium formation through cluster analysis." Problems and Perspectives in Management 14, no. 1 (2016): 117–26. http://dx.doi.org/10.21511/ppm.14(1).2016.13.

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Some problems cannot be solved optimally and compromises become necessary. In some cases obtaining an optimal solution may require combining algorithms and iterations. This often occurs when the problem is complex and a single procedure does not reach optimality. This paper shows a conglomerate of algorithms iterated in tasks to form an optimal consortium using cluster analysis. Hierarchical methods and distance measures lead the process. Few companies are desirable in optimal consortium formation. However, this study shows that optimization cannot be predetermined based on a specific fixed number of companies. The experiential exercise forms an optimal consortium of four companies from six shortlisted competitors

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WANG, Z. P., F. S. ZHANG, X. H. ZENG, F. WANG, S. F. ZHANG, and Y. P. ZHANG. "CLUSTER MATTER FORMATION IN CLUSTER COLLISIONS." International Journal of Modern Physics B 19, no. 15n17 (2005): 2465–70. http://dx.doi.org/10.1142/s0217979205031158.

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By using the tight-binding molecular dynamics simulations in cluster collisions, we give some evidences of the structures of ( Na 9)2 cluster dimer and ( Na 4)4 cluster tetramer from the dynamical point of view. We show that the ( Na 9)2 and ( Na 4)4 cluster matter may exist as intermediate states and finally decay to compact structure in real collision process. With a technique called "sharp cooling", the stable cluster structures ( Na 9)2 and ( Na 4)4 are brought into being to end. The eigen-mode frequencies of these clusters are obtained with Fourier transform of the velocity auto-correlation function which can characterize their structure properties.

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Kroupa, Pavel. "Star-cluster formation and evolution." Proceedings of the International Astronomical Union 2, S237 (2006): 230–37. http://dx.doi.org/10.1017/s1743921307001524.

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AbstractStar clusters are observed to form in a highly compact state and with low star-formation efficiencies, and only 10 per cent of all clusters appear to survive to middle- and old-dynamical age. If the residual gas is expelled on a dynamical time the clusters disrupt. Massive clusters may then feed a hot kinematical stellar component into their host-galaxy's field population thereby thickening galactic disks, a process that theories of galaxy formation and evolution need to accommodate. If the gas-evacuation time-scale depends on cluster mass, then a power-law embedded-cluster mass function may transform within a few dozen Myr to a mass function with a turnover near 105M, thereby possibly explaining this universal empirical feature. Discordant empirical evidence on the mass function of star clusters leads to the insight that the physical processes shaping early cluster evolution remain an issue of cutting-edge research.

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Gnedin, Oleg Y. "Modeling Formation of Globular Clusters: Beacons of Galactic Star Formation." Proceedings of the International Astronomical Union 6, S270 (2010): 381–84. http://dx.doi.org/10.1017/s1743921311000676.

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AbstractModern hydrodynamic simulations of galaxy formation are able to predict accurately the rates and locations of the assembly of giant molecular clouds in early galaxies. These clouds could host star clusters with the masses and sizes of real globular clusters. I describe current state-of-the-art simulations aimed at understanding the origin of the cluster mass function and metallicity distribution. Metallicity bimodality of globular cluster systems appears to be a natural outcome of hierarchical formation and gradually declining fraction of cold gas in galaxies. Globular cluster formation was most prominent at redshifts z > 3, when massive star clusters may have contributed as much as 20% of all galactic star formation.

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Кыдырбаева, И. "CLUSTER FORMATION POTENTIAL ANALYSIS." Vestnik Bishkek state university af. K. Karasaev 1, no. 59 (2022): 3–5. http://dx.doi.org/10.35254/bhu/2022.59.3.

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This article high lights the concept of the cluster and the advantages of the cluster approach, as well as in order to increase the competitiveness of the regional economy, it is necessary to determine an effective model of the regional economy that allows the maximum use of the existing potential. Cluster policy is one of the most common mechanisms for the implementation of state and regional economic policy. The main goal of implementing the cluster policy is to ensure high rates of economic growth and diversification of the economy by increasing the competitiveness of enterprises, suppliers of equipment, components, specialized production and services, research and educational organizations that form economic clusters in the regions. This article also highlights the main directions of regional cluster policy.

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Shkoda, Мariana, and Yana Onofriichuk. "SYSTEMATIZATION OF SCIENTIFIC CONCEPTS AND THEORIES OF THE FORMATION OF CLUSTER-UNITED ENTERPRISES." Management 37, no. 1 (2024): 9–18. http://dx.doi.org/10.30857/2415-3206.2023.1.1.

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The purpose of the article is research and systematization of scientific concepts and theories regarding the formation of cluster-united enterprises. Research methods. In this study, when carrying out the systematization of scientific concepts and theories, the authors used general scientific research methods, in particular, to reveal the evolutionary foundations of the development of cluster theory, comparative analysis of scientific concepts of both foreign and domestic scientists regarding the development of cluster formations, the formation of cluster-united enterprises, the following empirical methods were used as a method of historical analysis, methods of logical and comparative analysis. Presentation of the main research material. In the course of research and systematization of scientific concepts and theories regarding the formation of cluster-united enterprises, analyzing scientific concepts and theories regarding the formation of cluster-united enterprises, it was highlighted that within the limits of these theories, the concept of a cluster is complemented by such characteristics as systems of generation and dissemination of innovative ideas and experience, which in turn generally affects the modernization of the national economy. The article substantiates that cluster forms of organization of research subjects and organization of production make it possible to facilitate the commercialization of innovations and make it possible to create favorable conditions for the development of new highly specialized innovative and active areas of activity. Conclusions from the conducted research. The article outlines that modern science still lacks a generally accepted understanding of when the first clusters appeared. The evolutionary study of the development of cluster formations and their global connections indisputably points to the growing relationship of cluster-united enterprises, where resources and competences are combined, access to target markets and know-how becomes open, information and experience are exchanged between clusters. Keywords: cluster theory; cluster; cluster formations; clusterization.

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Smagulova, Zh B., and A. E. Mukhanova. "CLUSTERS AS A SUBJECT OF MODERN ECONOMY." Bulletin of the Korkyt Ata Kyzylorda University 58, no. 3 (2021): 214–21. http://dx.doi.org/10.52081/bkaku.2021.v58.i3.090.

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The article is devoted to the analysis of clusters as a new factor of increasing competitiveness in the modern economy. The initial preconditions for the formation of clusters are described (the presence of competitive enterprises, presence of competitive advantages for cluster development in region, geographical concentration, an extensive selection of participants, existence of links and interactions between cluster entities). The characteristic features of clusters are given (the possibility of research and development; qualification of the workforce; improvement of labor potential, collective vision and leadership; proximity of suppliers and connections with them; availability of capital; access to specialized services; associated structures; intensity of network formation; entrepreneurial energy; innovation and training). The general features of cluster formations are characterized (presence of critical mass; specialization of firms on various aspects of the value chain; mainly horizontal structure of relations and regulation) The classification of clusters is given (by territorial coverage, by stage of cluster development, by degree of products novelty, by role in the system of exchange and use of knowledge, by presence and degree of development of elements in cluster structure, by level of aggregation of cluster participants, by nature of the industry of enterprises participating in the cluster). The models of cluster formation (Italian, Japanese, Finnish, North American, Indian-Chinese, etc.) are highlighted.

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Lantu, Donald Crestofel, Sri Herliana, Mia Rosmiati, Qorri Aina, and Nur Lawiyah. "The Formation of Food Cluster in Indonesia." MATEC Web of Conferences 215 (2018): 02009. http://dx.doi.org/10.1051/matecconf/201821502009.

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Cluster has an important role in developing the existing resources in an area to be economic value. Companies gain competitive advantage through competing with each other. However, there is now an increased awareness that to ensure survival, it is necessary to balance industrial advocacy and personal interests. Thus, cluster operations are characterized by competition and cooperation, where the role of quadruple helix plays a role in it. SME clusters occur in every country, considering that SMEs are an important element in the economy of the country. Most SMEs in developing countries are located in industrial clusters. Despite the limitations in organizational resources and capacity, the grouping of companies in geographic proximity is capable of improving the performance of the companies within them. Therefore, cluster formation becomes the main attraction for deeper examination, how clusters are formed and how the process and role of elements in it. This study involves two different case studies of the chips and milk dairy clusters, both located in Cimahi, West Java. West Java is one of the provinces that have potential in the development of food and beverage clusters. This research uses qualitative data approach and supported by literature data support. From the analysis result, both clusters have different cluster forming approach, where the formation of clusters of chips, formed spreads and dairy cluster vertically.

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Dissertations / Theses on the topic "Cluster formation"

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Dale, J. E. "Feedback in star cluster formation." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598249.

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Massive stars emit strong fluxes of ionising radiation and their dynamical impact on their natal clusters is expected to be severe. The outflows generated expel residual gas from the cluster and can potentially gravitationally disrupt it. The loss of its reserves of molecular gas also prevents the cluster forming more stars. Star-formation and star cluster evolution cannot be fully understood without a proper treatment of feedback. I present a novel technique I have developed to allow the inclusion of the effects of ionising radiation in smoothed particle hydrodynamics (SPH) simulations of star clusters. The new algorithm is able to reproduce the results of simple analytical models and also gives results in good agreement with a more sophisticated Monte Carlo radiative transfer code when tested under highly anisotropic conditions. I simulate the effects of ionising radiation in globular clusters and compare my results with one-dimensional calculations with which I find good agreement. I investigate three cases in which different quantities of gas are distributed in my model cluster such that the as becomes fully ionised either during the HII region’s formation phase, or during its expansion phase, or such that the HII region is trapped inside the cluster core. I find gas expulsion to be quite efficient in the calculations in which the HII region escapes the core. I observe an instability in the second calculation which causes the shocked shell driven by the ionisation front to fragment as the HII region exits the core. The instability produces new structure from the smooth gas in the system, but this structure is rapidly destroyed by the radiation field and the effect of the instability on the evolution of the system is minimal. I also simulate feedback in the context of young embedded clusters, a highly inhomogeneous and anisotropic environment. I find that, again, photoionisation is able to produce novel structure in the ambient gas, causing it to fragment into filaments and beads. This fragmentation of the neutral gas, together with compression by hot ionised gas, which decreases the Jeans mass, lead me to conclude that feedback promotes star formation.

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Bailey, Philip John. "Carbide formation and cluster build-up reactions in ruthenium carbonyl cluster chemistry." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335689.

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Bergman, Edward M., and Patrick Lehner. "Industrial cluster formation in European regions. U.S. cluster templates and Austrian evidence." Institut für Wirtschaftsgeographie, Abt. Stadt- und Regionalentwicklung, WU Vienna University of Economics and Business, 1998. http://epub.wu.ac.at/748/1/document.pdf.

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The paper will be organized in the following manner. We first provide a concise review of how industrial trade clusters were developed from available I/O coefficients (see box), including how regional industrial data may be embedded within their "templates". Second, we will review the steps taken, using available industrial concordances, that permit regional data from other advanced national industrial systems to be embedded within these templates. Third, we will illustrate the results of applying the U.S. template for the motor vehicle industrial trade cluster to regions in both Austria and North Carolina over 5-10 year time periods. Finally, we will offer some speculative observations about what the results may indicate about regional cluster development in these two regions. (authors' abstract, ed. M.Putz)<br>Series: SRE - Discussion Papers

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Harris, William E., Stephanie M. Ciccone, Gwendolyn M. Eadie, et al. "GLOBULAR CLUSTER SYSTEMS IN BRIGHTEST CLUSTER GALAXIES. III. BEYOND BIMODALITY." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/622870.

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We present new deep photometry of the rich globular cluster (GC) systems around the Brightest Cluster Galaxies UGC 9799 (Abell 2052) and UGC 10143 (Abell 2147), obtained with the Hubble Space Telescope (HST) ACS and WFC3 cameras. For comparison, we also present new reductions of similar HST/ACS data for the Coma supergiants NGC 4874 and 4889. All four of these galaxies have huge cluster populations (to the radial limits of our data, comprising from 12,000 to 23,000 clusters per galaxy). The metallicity distribution functions (MDFs) of the GCs can still be matched by a bimodal-Gaussian form where the metal-rich and metal-poor modes are separated by similar or equal to 0.8 dex, but the internal dispersions of each mode are so large that the total MDF becomes very broad and nearly continuous from [Fe/H] similar or equal to-2.4 to solar. There are, however, significant differences between galaxies in the relative numbers of metal-rich clusters, suggesting that they underwent significantly different histories of mergers with massive gas-rich halos. Last, the proportion of metal-poor GCs rises especially rapidly outside projected radii R >= 4 R-eff, suggesting the importance of accreted dwarf satellites in the outer halo. Comprehensive models for the formation of GCs as part of the hierarchical formation of their parent galaxies will be needed to trace the systematic change in structure of the MDF with galaxy mass, from the distinctly bimodal form in smaller galaxies up to the broad continuum that we see in the very largest systems.

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Chen, Bo-Gaun. "Cluster formation in supersonic beams of dense fluids." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17441.

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Mit zeitaufgelöster Massenspektrometrie untersuchen wir die Winkelverteilung von Kohlendioxid-Monomeren bei der Streuung von Kohlendioxid-Clustern an einer Si(111)/Siliciumdioxid-Oberfläche unter Ultrahochvakuum-Bedingungen. Die präsen- tierten Studien decken eine große Breite der Clustergrößen, , 1,000 < N < 200,000 Moleküle pro Partikel, ab. Dabei liegt der Fokus auf dem Einfluss der Ausgangsentropie, die durch eine präzise Einstellung des Ausgangsdruckes und der Düsentemperatur realisiert wurde. Es zeigt sich, daß die Streuverteilung direkt den Expansionspfad widerspiegelt, wodurch eine Unterscheidung zwischen Clustern, die durch eine Expansion auf der gasförmigen oder flüssigen Seite des kritischen Punktes und der metstabilen Phase ent- stehen, ermöglicht wird. Um bei den hohen Teilchendichten eine verlässliche Aussage zu ermöglichen, wurden im Vorfeld die Eigenschaften gepulster Molekularstrahlen untersucht, insbesondere deren Abhängigkeit vom Restgasdruck und den Wechselwirkungen mit Strahlblenden. Hierzu diente die elektronische Anregung eines Helium-Strahls. Die Optimierung der Randbedingungen ermöglicht viel kältere Strahlen, so dass Helium-Cluster sogar bei einer Ausgangstemperatur von T = 410.0 K gefunden werden können. Dieses Ergebnis ist für die Cluster-Forschung, die Molekülspektroskopie und Experimente in der Quantenphysik von Bedeutung.<br>Employing pulsed high-pressure supersonic jet expansion and a dedicated setup for the experimental investigation of chemical processes occurring between neutral, van der Waals bound clusters and a solid surface, we report on the angular distribution observed for large carbon dioxide clusters scattered off a Si(111)/Silicon Dioxide surface under ultrahigh vacuum conditions. Scattered particles are detected using angle and time resolved mass spectrometry. The presented studies cover a broad range of cluster sizes, , 1,000 < N < 200,000 molecules per particle. The focus is on the influence of source entropy, realized by accurately setting stagnation pressure and temperature. This thesis demonstrates a dependence of the angular distribution of scattered carbon dioxide monomers on source conditions: the scattering distribution directly reflects the expansion path, allowing us to distinguish between clusters generated via expansion on the gaseous or on the liquid side of the critical point, and an intermediate regime where the expansion passes the metastable gas-liquid region. To optimize the supersonic beam, on the other hand, we reveal a substantial influence of residual gas pressure and beam–skimmer interactions on beam properties, particularly the minimum attainable translational temperature in a model system. This study contains the systematic investigation of supersonic jet expansions of helium, employing the variable distance between the Even-Lavie valve and different types of skimmers. Utilizing the ultra-high precision time-of-flight measurements of electronically tagged particles, the terminal velocities and the spread of particles allow us to correspondingly obtain much colder beams with the same source conditions. As a result, helium clusters can be found even in the jet expansion from a source temperature of T = 410.0 K. This knowledge is of particular interest to cluster science, molecular spectroscopy, and quantum physics.

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Strader, Jay. "Extragalactic globular cluster subpopulations and galaxy formation /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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Sacilotto, Cintia Kulzer. "Industrial cluster relocation : cluster formation, development and technological change in the destination region." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:22ee5a2d-ea95-4c58-941a-5e6385e03f1a.

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This dissertation presents the first systematic study on cluster relocation, providing a non- random and dynamic analysis of firm relocations. Seeking to contribute to the understanding of cluster relocations and their consequences for the destination region, I explore the process and determinants of a particular cluster relocation and investigate the growth and maintenance of the new cluster through the enhancement of its supplier base, the diffusion of innovations, and advances in technological change. I analyse the differences between first and late mover firms in the process of cluster relocation to unveil the elements that boost relocation. I examine the process of technological change that occurs in the destination region. On one hand, I explore the channels for the diffusion of specific innovations and provide novel evidence for the cluster literature by considering different channels simultaneously. I measure the importance of local and relocated firms for the diffusion of innovations, unveiling the mechanisms by which knowledge spillovers with and among local firms take place. On the other hand, I present a dynamic view of the impact of relocated firms in the new region, providing unique details of technological change and the build-up of absorptive capacity over time. I analyse the changing role of relocated firms in the creation and expansion of local firms' capabilities. The relocation of the Sinos Valley footwear cluster in Brazil is analysed as a case study in this research. After being defined as a 'supercluster' by Schmitz (1995), the cluster collapsed and partially relocated in the end of the 1990s to the northeast of Brazil, and to China, following major changes that affected the competitiveness of the sector. In their attempt to survive, several firms relocated to the Cariri area in the state of Ceará, northeast Brazil. I follow this relocation process using mapping techniques, analysing the diffusion of innovations and technological change processes through an extensive set of interviews and a complete social network analysis.

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Hohertz, Jeremy D. "Formation of a globular cluster via gravitational capture." Oxford, Ohio : Miami University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1217352629.

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Canning, Rebecca Elizabeth Ann. "Star and filament formation in brightest cluster galaxies." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610523.

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Santoro, Fernando. "Semi analytical simulations of primordial star cluster formation." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288843.

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Books on the topic "Cluster formation"

1

1963-, Zepf Stephen E., ed. Globular cluster systems. Cambridge University Press, 1998.

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Shirinzadeh, B. Study of cluster formation and its effects on Rayleigh and Raman scattering measurements in a Mach 6 wind tunnel. American Institute of Aeronautics and Astronautics, 1991.

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United States. National Aeronautics and Space Administration., ed. Spectral characteristics and the extent of paleosols of the Palouse formation: Second semiannual progress report. National Aeronautics and Space Administration, 1987.

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4

Read, Paul A. Ion-molecule reactions and cluster ion formation of uranyl and related ions in the gas phase. typescript, 1989.

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Kuchiki, Akifumi. The flowchart approch to the formation of industrial cluster: Forcusing on the endogenous R&D and innovation mechanism. IDE-JETRO, 2007.

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Chuan tong nong qu chan ye ji qun xing cheng yu yan hua: Formation and evolution mechanism of industrial cluster in traditional agricultural plain area. She hui ke xue wen xian chu ban she, 2010.

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Froggatt, Dorothy Anne. Birds of a feather: the study of the formation and development of a cluster of four small rural schools. (s.n.), 1990.

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Willem, Hulsink, and Dons Hans, eds. Pathways to high-tech valleys and research triangles: Innovative entrepreneurship, knowledge transfer and cluster formation in Europe and the United States. Springer, 2008.

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Space Telescope Science Institute (U. Massive Disk Formation Resulting From the Collision of A Main Sequence Star with A White Dwarf in A Globular Cluster Core. s.n, 1987.

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Cityscapes of Hellenistic Sicily: Proceedings of a Conference of the Excellence Cluster Topoi : the Formation and Transformation of Space and Knowledge in Ancient Civilizations : held at Berlin, 15-18 June 2017. Edizioni Quasar, 2019.

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Book chapters on the topic "Cluster formation"

1

Stevenson, David. "Globular Cluster Formation." In The Complex Lives of Star Clusters. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14234-0_4.

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Larson, Richard B. "Galaxy Formation and Cluster Formation." In The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-015-1104-9_43.

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Bäuerle, Dieter. "Nucleation and Cluster Formation." In Laser Processing and Chemistry. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17613-5_4.

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Bäuerle, Dieter. "Nucleation and Cluster Formation." In Advanced Texts in Physics. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04074-4_4.

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Bäuerle, Dieter. "Nucleation and Cluster Formation." In Laser Processing and Chemistry. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-03253-4_4.

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Fritze-v. Alvensleben, Uta. "Star Formation Efficiencies and Star Cluster Formation." In Starbursts. Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3539-x_36.

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Vicente, Jérôme. "Untraded Interdependencies and Cluster Formation." In Economics of Clusters. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78870-8_3.

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Hennebelle, Patrick. "Numerical Simulations of Cluster Formation." In The Birth of Star Clusters. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-22801-3_2.

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Bader, Markus, Tanja Schmid, and Jana Häussler. "Optionality in verb cluster formation." In The Fruits of Empirical Linguistics II. Mouton de Gruyter, 2009. http://dx.doi.org/10.1515/9783110216158.37.

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Ganeev, Rashid A. "Laser Ablation Induced Cluster Formation." In Springer Series in Optical Sciences. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6022-6_4.

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Conference papers on the topic "Cluster formation"

1

Gudipaty, Tarun, Luthur S. L. Cheung, Linan Jiang, and Yitshak Zohar. "Cluster Formation and Growth in Flow of Dilute Particle Suspension in Microchannels." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59602.

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Microchannels are susceptible to blockage by solid particles. The lifetime of microfluidic devices depends on their ability to maintain flow without interruption, while certain applications require microdevices for transport of liquids containing particles. In this work, the phenomenon of interest is the formation and growth of clusters in the flow of a dilute suspension of hard spheres. Based on the present experiments, aggregation of clusters was observed for particle-laden flow in a microchannel with particle void fraction as low as 0.001 and particle diameter to channel height ratio as low as 0.1. The incipience and growth of a single cluster is discussed, and the spatial distribution and time evolution of clusters along the microchannel is presented. Although the cluster size seems to be independent of location, higher number of clusters is found at the inlet/outlet regions than in the microchannel center. Similar to individual cluster, the total cluster area in the microchannel grows almost linearly in time. The effects of flow rate, particle size and concentration are also reported.

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TOLOCHKO, N. K., and A. Z. MYALDUN. "CLUSTER MECHANISMS OF NANOCRYSTAL FORMATION." In Physics, Chemistry and Application of Nanostructures - Reviews and Short Notes to Nanomeeting 2003. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812796738_0099.

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Ibrahim, Ahmed Farid. "Cluster Spacing Effect on the Fracture Interference Including Stress Shadow." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-24408-ms.

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Abstract Over the last decade, the application of horizontal drilling and multistage hydraulic fracturing has significantly impacted shale formations, achieving economic productivity through the creation of expansive fracture surfaces. Determining the optimal cluster spacing in shale gas wells is a complex task, contingent upon the unique geological characteristics of each formation. While a closer spacing between clusters can enhance gas recovery, it escalates drilling and completion costs, compounded by stress shadow effects on fracture propagation. This research introduces a comprehensive workflow to investigate the impact of cluster interference on well performance. Commencing with a fracture propagation model, accounting for stress shadow effects due to the same injected slurry volume, we integrated analytical rate transient analysis (RTA) with reservoir numerical simulation to assess the effective fracture surface area for hydrocarbon production. The effective fracture surface area from RTA to the actual stimulated fracture area from numerical simulation ratio was then correlated to cluster spacing. Findings reveal that higher stage numbers and tighter cluster spacing result in increased cluster interference, yielding a low effective to actual fracture surface area ratio and heightened stress shadow effects, hindering fracture propagation. Conversely, widening cluster spacing, with a constant injected proppant volume, boosts the effective to actual fracture surface area ratio and diminishes cluster interference. Optimal spacing, based on formation properties, was identified as 6 clusters per stage with 33 ft spacing. This research provides valuable insights for completion and reservoir engineers, aiding in the optimization of cluster spacing to maximize well revenue.

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Turkay, Cagatay, Julius Parulek, Nathalie Reuter, and Helwig Hauser. "Integrating cluster formation and cluster evaluation in interactive visual analysis." In the 27th Spring Conference. ACM Press, 2013. http://dx.doi.org/10.1145/2461217.2461234.

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Glavonjic, Vesna, Aleksandar Neskovic, and Ljerka Beus-Dukic. "LEACH-reformed clusters: A novel cluster formation algorithm in LEACH protocol." In 2016 Wireless Days (WD). IEEE, 2016. http://dx.doi.org/10.1109/wd.2016.7461447.

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Matsuo, Jiro, Makoto Akizuki, and Isao Yamada. "Cluster ion assisted thin film formation." In The fourteenth international conference on the application of accelerators in research and industry. AIP, 1997. http://dx.doi.org/10.1063/1.52489.

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Liu, Donggang. "Resilient Cluster Formation for Sensor Networks." In 27th International Conference on Distributed Computing Systems (ICDCS '07). IEEE, 2007. http://dx.doi.org/10.1109/icdcs.2007.131.

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Brown, Todd M., Dane Vinson, Mark G. Kuzyk, and Mark P. Andrews. "Fractal metal cluster formation in polymers." In SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, edited by Gustaaf R. Moehlmann. SPIE, 1995. http://dx.doi.org/10.1117/12.222805.

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Sutmann, G., H. Ganesan, and C. Begau. "Cluster formation in stochastic disk systems." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.4992772.

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Barbosa, Eduardo, Everaldo Arashiro, Carlos Felipe Pinheiro, and Alcides Castro e Silva. "Cluster formation dynamics of heterogeneous agents." In 6th International Conference on Nonlinear Science and Complexity. INPE Instituto Nacional de Pesquisas Espaciais, 2016. http://dx.doi.org/10.20906/cps/nsc2016-0012.

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Reports on the topic "Cluster formation"

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Weaver, J. H. Cluster Formation and Evolution on Semiconductor Surface. Defense Technical Information Center, 1992. http://dx.doi.org/10.21236/ada259190.

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Mohammed, John L. Mission Planning for a Formation-Flying Satellite Cluster. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada438434.

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Baltz, A. J., C. B. Dover, S. H. Kahana, Y. Pang, T. J. Schlagel, and E. Schnedermann. Strange cluster formation in relativistic heavy ion collisions. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10189452.

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J.L. Shinpaugh, M. Dingfelder, and G. Lapicki, and Co-Investigators. Final Report - Modeling the Physics of Damage Cluster Formation in a Cellular Environment Modeling the Physics of Damage Cluster Formation in a Cellular Environment. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/896949.

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Anders, Scott L. Interface Formation and Solid-Solid Reactions Induced by Cluster Ion Deposition. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada371853.

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Prokhorova, V. V., and S. V. Aluyan. Methodical principles of the wine cluster formation in the Krasnodar Territory. ООО «Электронные издательские технологии», 2015. http://dx.doi.org/10.18411/2015-10-004.

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FEIBELMAN, PETER J. Formation and Diffusion of S-Decorated Cu Cluster on Cu(111). Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/767889.

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Hair. L52003 Application of the Crack Layer Theory for Understanding and Modeling of SCC in High Pressure. Pipeline Research Council International, Inc. (PRCI), 2003. http://dx.doi.org/10.55274/r0010893.

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A stochastic features of SCC colony, such as corrosion pit distribution, SC crack initiation from the pits and SC crack aspect ratio, SC crack cluster formation, SC cluster interaction and instability, are observed and characterized. A concept of a single crack equivalent to a cluster of cracks is introduced to simplify computational work on clusters evolution and instability. Various criteria of equivalence for different stages of clusters evolution are discussed. An accelerated test with a number of accelerating factors has been designed and performed for simulation of individual SC crack growth. Corrosion products at each stage of single crack propagation are investigated by means of Raman and FTIR analysis. The crack layer theory is adopted for modeling of SC crack growth. It provides the formalism for modeling of the effect of such processes as electro-chemical reactions, hydrogen embrittlement, and mechanical loading rates on crack growth rate. Finally, a computer simulation of SC crack growth was performed and validated by the available set of experimental data.

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Mohammed, John L. SpaceCAPS: Automated Mission Planning for the TechSat 21 Formation-Flying Cluster Experiment. Defense Technical Information Center, 2002. http://dx.doi.org/10.21236/ada440102.

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Lazio, T. J., and James M. Cordes. LOFAR Scientific Memorandum Number 1: Cluster-Formation Synchrotron Radiation. A Contaminant for Epoch of Reionization Experiments and a Signal for Probing Cluster Formation and the Gamma-Ray Background. Defense Technical Information Center, 2002. http://dx.doi.org/10.21236/ada411908.

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