Thematische Bibliographien / Partial cube

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Partial cube“

Autor: Grafiati
Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Partial cube"

1

Chepoi, Victor, Kolja Knauer und Tilen Marc. „Hypercellular graphs: Partial cubes without Q3− as partial cube minor“. Discrete Mathematics 343, Nr. 4 (April 2020): 111678. http://dx.doi.org/10.1016/j.disc.2019.111678.

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2

O. Ngonadi, Lilian, und Francis C. Eze. „Some Optimality Variations of Central Composite Designs“. Academic Journal of Applied Mathematical Sciences, Nr. 54 (15.04.2019): 32–42. http://dx.doi.org/10.32861/ajams.54.32.42.

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Some variations of central composite designs (CCD) under complete and partial replications of cube, axial and center points are studied using A, D and G optimality criteria. The results obtained suggest that complete replication of the cube, axial and center points are better than the partial replication of cube, axial and center points under the A and D optimality criteria studied while it varies under G optimality criterion. The partial replication of the cube, axial and center point for all the CCDs studied, the partial replicated cube point is D optimal but varies under A and G optimality criteria.
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O. Ngonadi, Lilian, und Francis C. Eze. „Some Optimality Variations of Central Composite Designs“. Academic Journal of Applied Mathematical Sciences, Nr. 54 (15.04.2019): 32–42. http://dx.doi.org/10.32861/ajams.54.32.42.

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Some variations of central composite designs (CCD) under complete and partial replications of cube, axial and center points are studied using A, D and G optimality criteria. The results obtained suggest that complete replication of the cube, axial and center points are better than the partial replication of cube, axial and center points under the A and D optimality criteria studied while it varies under G optimality criterion. The partial replication of the cube, axial and center point for all the CCDs studied, the partial replicated cube point is D optimal but varies under A and G optimality criteria.
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D, Raghavendra Prasad H., Nagaraj Sitaram, Pavan P. S und Dushyanth V. BABU R. „Economical Concrete Cube Prepared Using Different Types of Nano-Material for Sustainable Construction“. ECS Transactions 107, Nr. 1 (24.04.2022): 10509–17. http://dx.doi.org/10.1149/10701.10509ecst.

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In this research work concrete cube has been prepared by doing partial replacement for cement using nano materials like Multi-Walled Carbon Nano Tubes (MWCNTs), titanium dioxide (TiO2), and copper oxide (CuO) at different percentages like 0.1, 0.25, and 0.5%. Basic test has been done for materials and fresh concrete, followed by compressive strength test for concrete cubes. MWCNT gives more result compare to TiO2 and CuO. Just to reduce cement usage, fly ash has been used by keeping the compressive strength and the amount of nano materials as constant up to 35% of MWCNTs, TiO2, and CuO, with fly ash replaced for cement to obtain the normal strength. Cost analysis has been done to find out the economic efficiency of nano material concrete cube due to which TiO2 with fly ash cost 14.45Rs to prepare single cube, as MWCNTs and CuO with fly ash cost 726.4 and 17.64Rs to prepare single concrete cube. Almost TiO2 cube preparation took 10% reduction for the preparation of concrete cube compare to normal concrete cube has taken 15.96Rs. So we concluded that TiO2 with fly ash nano material concrete is the economical efficient concrete compared to MWCNTs and CuO with fly ash.
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Chellew, Guylaine, und M. A. Persinger. „Women but Not Men Exhibit a Positive Correlation between Complex Partial Epileptic-Like Signs and Tactile-Visual Cross-Modal Matching: Implications for Hemispheric Intercalation“. Perceptual and Motor Skills 78, Nr. 3_suppl (Juni 1994): 1312–14. http://dx.doi.org/10.2466/pms.1994.78.3c.1312.

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16 right-handed men and 19 women were asked to feel various sized wooden cubes with the dominant hand for 2 sec. (without visual feedback) and then to select this cube from a random visual arrangement of cubes (tactile-visual matching) after a brief delay. The accuracy for men and women for this task did not differ significantly; however, the accuracy was significantly correlated ( rho = 0.61) with a history of complex partial epileptic-like signs for the women but not for the men. The results support the hypothesis that elevated scores for complex partial epileptic-like signs in right-handed women enhance their capacity to associate different perceptual domains of the same stimuli because there is elevated activity within the (multimodal) hippo-campal-amygdaloid system (sensory-limbic hyperconnectionism) and the correlative enhanced intercalation between the right and left temporoparietal lobes.
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Lindner, Peter, Sachin Basil John, Christoph Koch und Dan Suciu. „The Moments Method for Approximate Data Cube Queries“. Proceedings of the ACM on Management of Data 2, Nr. 2 (10.05.2024): 1–23. http://dx.doi.org/10.1145/3651147.

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We investigate an approximation algorithm for various aggregate queries on partially materialized data cubes. Data cubes are interpreted as probability distributions, and cuboids from a partial materialization populate the terms of a series expansion of the target query distribution. Unknown terms in the expansion are just assumed to be 0 in order to recover an approximate query result. We identify this method as a variant of related approaches from other fields of science, that is, the Bahadur representation and, more generally, (biased) Fourier expansions of Boolean functions. Existing literature indicates a rich but intricate theoretical landscape. Focusing on the data cube application, we start by investigating worst-case error bounds. We build upon prior work to obtain provably optimal materialization strategies with respect to query workloads. In addition, we propose a new heuristic method governing materialization decisions. Finally, we show that well-approximated queries are guaranteed to have well-approximated roll-ups.
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7

.K.M, Ms Jayakumari. „Experimental Study on Compressive Strength of the Cement Mortar Cubes with Partial Replacement of Fine Aggregate Using Polyvinyl Chloride (PVC) Plastic“. INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, Nr. 04 (27.04.2024): 1–5. http://dx.doi.org/10.55041/ijsrem31851.

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Mortar is a material that consists of cement and sand with a range of applications in the construction industry. However, the plain mortar materials are usually brittle and often crack and fail more suddenly than reinforced mortar. This experimental study is about the compressive strength of cement mortar stabilised with the use of the polyvinyl chloride (PVC) plastic powder. Generally the compressive strength of cement mortar of mix proportion (1:3) is 33 N/mm² to 53 N/mm² has been obtained after 28 days curing. The cement mortar ratio is 1: 3 respectively. The PVC powder is added along with the sand with percentages of 0%, 2.5%, 5%, 7.5%, 10% respectively. And the water cement ratio is 0.5 with volume. The moulds of 70×70×70 mm size were used for the cube test, and the cubes were tested on the Compressive testing machine to determine the strength of cube for 3, 7, 28 days of time period respectively. The main aim of f this study to determine the compressive strength of cement mortar (1:3) of sand added with PVC powder, Key Words:- Waste Plastic, Polyvinyl Chloride, Compressive Strength, Mortar.
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Balpande, Ajinkya. „An Experimental Study on Partial Replacement of GGBS with Cement and Utilizing Demolished Coarse Aggregate in Concrete“. International Journal for Research in Applied Science and Engineering Technology 11, Nr. 6 (30.06.2023): 41–47. http://dx.doi.org/10.22214/ijraset.2023.53608.

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bstract: The majority of municipal solid wastes are made up of debris from construction and demolition projects, including recycled construction aggregate (RCA). This paper presents the findings of an experimental and analytical examination of the creation of environmentally friendly concrete. It is a good idea to replace natural material with aggregate from old, demolished structures to reduce debris and preserve the environment. To reduce consumption, recycled aggregate can be utilized in place of natural aggregate. To address these issues, an attempt is undertaken in the current experimental work to substitute GGBS in varied proportions for cement. The purpose of this research is to demonstrate the findings of an investigation into the applicability of GGBS in the manufacturing of concrete by using construction and demolition debris as a recycled resource. Ground granulated blast furnace slag (GGBS) and recycled concrete aggregates are the recycled materials employed in this study. A concrete mix of grade M25 was created through the mix design process. GGBS was partially replaced with wastedestroyed aggregate in the amounts of 0, 10, 20, 30, and 40% to create the mixes. Cubes of 150x150x150mm3 were poured. The compressive strength of the concrete cube specimens was measured by smashing the cube after 7, 14, 28, 60, and 90 days of curing for various curing intervals. The compression test results on the cubes show that strength increases with the amount of slag added up to the maximum value. Compressive strength was seen to grow when GGBS content increased up to 30%, but after the replacement level was above 30%, strength began to deteriorate. The outcomes of GGBS with conventional concrete and concrete made entirely of demolished aggregate without GGBS are compared to the outcomes of GGBS with concrete containing demolished aggregate
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Sturtevant, Nathan, Ariel Felner und Malte Helmert. „Exploiting the Rubik's Cube 12-Edge PDB by Combining Partial Pattern Databases and Bloom Filters“. Proceedings of the International Symposium on Combinatorial Search 5, Nr. 1 (01.09.2021): 175–83. http://dx.doi.org/10.1609/socs.v5i1.18332.

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Pattern Databases (PDBs) are a common form of abstraction-based heuristic whichare often compressed so that a large PDB can fit inmemory. Partial Pattern Databases (PPDBs) achieve this by storing only layersof the PDB which are close to the goal. This paper studies the problem of howto best compress and use the 457 GB 12-edge Rubik's cube PDB, suggesting anumber of ways that Bloom filters can be used to effectively compress PPDBs. Wethen develop a theoretical model of the common min compression approach and ourBloom filters, showing that the original method of compressed PPDBs can neverbe better than min compression. We conclude with experimental results showingthat Bloom filter compression of PPDBs provides superior performance to mincompression in Rubik's cube.
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Kobayashi, Masakazu, Yoshimasa Takayama, Hajime Kato und Hiroyuki Toda. „In-Situ SEM/EBSP Analysis during Annealing in a Pure Aluminum Foil for Capacitor“. Materials Science Forum 539-543 (März 2007): 362–67. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.362.

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In-situ SEM/EBSP analysis has been performed during the evolution of the cube texture in a pure aluminum foil. In general, foils for capacitor are manufactured in an industrial process of casting, homogenizing, hot rolling, cold rolling (CR), partial annealing (PA), additional rolling (AR) and final annealing (FA). The foil samples after CR or AR in the process were analyzed by the SEM/EBSP technique at a constant temperature which was step-heated repeatedly by 10-20K from a room temperature to 623K or 598K. In a CRed sample, cube ({001}<100>) grains begin to grow preferentially at 503K to cover the sample. On the other hand, in a sample subjected to PA at 503K and AR, cube grains coarsened rapidly and preferentially at more than 533K in contrast to other oriented small grains remaining their sizes. Further, intragranular misorientation analysis revealed that the misorientation, which corresponds to dislocation density or strain, was much smaller in cube grains than in S ({123}<634>) and Cu ({112}<111>) ones.
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Dissertationen zum Thema "Partial cube"

1

Murthy, Siva Ram C. „A Broadcast Cube-Based Multiprocessor Architecture for Solving Partial Differential Equations“. Thesis, Indian Institute of Science, 1998. http://hdl.handle.net/2005/44.

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Indian Institute of Science
A large number of mathematical models in engineering and physical sciences employ Partial Differential Equations (PDEs). The sheer number of operations required in numerically integrating PDEs in these applications has motivated the search for faster methods of computing. The conventional uniprocessor computers are often unable to fulfill the performance requirements for these computation intensive problems. In this dissertation, a cost-effective message-based multiprocessor system which we call the Broadcast Cube System (BCS) has been proposed for solving important computation intensive problems such as, systems of linear algebraic equations and PDEs. A simulator for performance evaluation of parallel algorithms to be executed on the BCS has been implemented. A strategy (task assignment . algorithm) for assigning program tasks with precedence and communication constraints to the Processing Elements (PEs) in the BCS has been developed and its effectiveness demonstrated. This task assignment algorithm has been shown to produce optimal assignments for PDE problems. Optimal partitioning of the problems, solving systems of linear algebraic equations and PDEs, into tasks and their assignment to the PEs in the BCS have been given. Efficient parallel algorithms for solving these problems on the BCS have been designed. The performance of the parallel algorithms has been evaluated by both analytical and simulation methods. The results indicate that the BCS is highly effective in solving systems of linear algebraic equations and PDEs. The performance of these algorithms on the BCS has also been compared with that of their implementations on popular hypercube machines. The results show that the performance of the BCS is better than that of the hypercubes for linear algebraic equations and compares very well for PDEs, with a modest number of PEs despite the constant PE connectivity of three in the BCS. Finally, the effectiveness of the BCS in solving non-linear PDEs occurring in two important practical problems, (i) heat transfer and fluid flow simulation and (ii) global weather modeling, has been demonstrated.
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2

Murthy, Siva Ram C. „A Broadcast Cube-Based Multiprocessor Architecture for Solving Partial Differential Equations“. Thesis, Indian Institute of Science, 1988. https://etd.iisc.ac.in/handle/2005/3922.

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A large number of mathematical models in engineering and physical sciences employ Partial Differential Equations (PDEs). The sheer number of operations required in numerically integrating PDEs in these applications has motivated the search for faster methods of computing. The conventional uniprocessor computers are often unable to fulfill the performance requirements for these computation intensive problems. In this dissertation, a cost-effective message-based multiprocessor system which we call the Broadcast Cube System (BCS) has been proposed for solving important computation intensive problems such as, systems of linear algebraic equations and PDEs. A simulator for performance evaluation of parallel algorithms to be executed on the BCS has been implemented. A strategy (task assignment . algorithm) for assigning program tasks with precedence and communication constraints to the Processing Elements (PEs) in the BCS has been developed and its effectiveness demonstrated. This task assignment algorithm has been shown to produce optimal assignments for PDE problems. Optimal partitioning of the problems, solving systems of linear algebraic equations and PDEs, into tasks and their assignment to the PEs in the BCS have been given. Efficient parallel algorithms for solving these problems on the BCS have been designed. The performance of the parallel algorithms has been evaluated by both analytical and simulation methods. The results indicate that the BCS is highly effective in solving systems of linear algebraic equations and PDEs. The performance of these algorithms on the BCS has also been compared with that of their implementations on popular hypercube machines. The results show that the performance of the BCS is better than that of the hypercubes for linear algebraic equations and compares very well for PDEs, with a modest number of PEs despite the constant PE connectivity of three in the BCS. Finally, the effectiveness of the BCS in solving non-linear PDEs occurring in two important practical problems, (i) heat transfer and fluid flow simulation and (ii) global weather modeling, has been demonstrated.
Indian Institute of Science
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3

Ahmed, Usman. „Dynamic cubing for hierarchical multidimensional data space“. Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00876624.

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Data warehouses are being used in many applications since quite a long time. Traditionally, new data in these warehouses is loaded through offline bulk updates which implies that latest data is not always available for analysis. This, however, is not acceptable in many modern applications (such as intelligent building, smart grid etc.) that require the latest data for decision making. These modern applications necessitate real-time fast atomic integration of incoming facts in data warehouse. Moreover, the data defining the analysis dimensions, stored in dimension tables of these warehouses, also needs to be updated in real-time, in case of any change. In this thesis, such real-time data warehouses are defined as dynamic data warehouses. We propose a data model for these dynamic data warehouses and present the concept of Hierarchical Hybrid Multidimensional Data Space (HHMDS) which constitutes of both ordered and non-ordered hierarchical dimensions. The axes of the data space are non-ordered which help their dynamic evolution without any need of reordering. We define a data grouping structure, called Minimum Bounding Space (MBS), that helps efficient data partitioning of data in the space. Various operators, relations and metrics are defined which are used for the optimization of these data partitions and the analogies among classical OLAP concepts and the HHMDS are defined. We propose efficient algorithms to store summarized or detailed data, in form of MBS, in a tree structure called DyTree. Algorithms for OLAP queries over the DyTree are also detailed. The nodes of DyTree, holding MBS with associated aggregated measure values, represent materialized sections of cuboids and tree as a whole is a partially materialized and indexed data cube which is maintained using online atomic incremental updates. We propose a methodology to experimentally evaluate partial data cubing techniques and a prototype implementing this methodology is developed. The prototype lets us experimentally evaluate and simulate the structure and performance of the DyTree against other solutions. An extensive study is conducted using this prototype which shows that the DyTree is an efficient and effective partial data cubing solution for a dynamic data warehousing environment.
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Brito, Julian Araujo. „Cuba em transformação: socialismo e as reformas econômicas do 6 Congresso do Partido Comunista“. Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9160.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico
Esta dissertação reflete sobre os dilemas do socialismo contemporâneo a partir da experiência revolucionária cubana, focalizando especialmente a etapa conhecida como "atualização do socialismo". Em 2011 o VI Congresso do Partido Comunista de Cuba aprovou um conjunto de reformas econômicas cuja meta proclamada é a "atualização do modelo econômico e social" do país. Nestes termos, a proposta central do governo aponta para a diversificação dos atores econômicos e maiores níveis de descentralização, entretanto, sem abrir mão do predomínio da propriedade estatal sobre os meios de produção e da planificação sobre o mercado. Por outro lado, inegavelmente, essas medidas trazem mudanças significativas em relação ao modelo socialista historicamente construído em Cuba. Visando entender esse processo de transformações, o presente trabalho abordará os aspectos políticos e teóricos destas reformas.
Esta tesis de maestría reflexiona sobre los dilemas del socialismo contemporáneo desde la experiencia revolucionaria cubana, focalizando especialmente la etapa conocida como actualización del socialismo. En 2011 el VI Congreso del Partido Comunista de Cuba aprobó un conjunto de reformas económicas con la cual se ha proclamado la meta de "actualizar el modelo económico y social" del país. Así, la propuesta central del gobierno apunta para la diversificación de los actores económicos y mayores niveles de descentralización, sin embargo, manteniendo el predominio de la propiedad estatal sobre los medios de producción y la planificación sobre el mercado. Por otra parte, no hay como negar que estas medidas implican cambios significativos en el modelo socialista históricamente construido en Cuba. Buscando entender este proceso de cambios, el presente trabajo abordará los aspectos políticos y teóricos de estas reformas.
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Caldwell, Mary Kathryn. „Characterization of Epoxy-hybrid nano-particle Resins for ambient cure VARTM Processes“. NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-04232007-163012/.

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This thesis presents the mechanical characterization of fire resistant epoxy-hybrid resin systems suitable for ambient cure VARTM processes. Several new epoxy-hybrid nano-particle resins were developed and tested for use in large scale composite structures. Based on the viscosity, Tg, and cure time requirements twelve of these resins systems were pre-selected for mechanical testing. Neat resin castings were tested in tension to determine the elastic modulus, tensile strength and maximum elongation. From these results, six of the resin systems were further cast in unidirectional glass fiber laminates. Transverse tension and short beam shear testing was performed on all laminates to determine the mechanical properties of the glass/epoxy systems. Two of the epoxy-hybrid resin systems showed promising behaviors, having a higher transverse modulus and ultimate strength than the original benchmark vinyl-ester resin. Additionally, fiber Bragg grating sensors were embedded in one benchmark vinyl-ester laminate and one epoxy-hybrid laminate during the cure cycle. Taking advantage of both the extrinsic and intrinsic properties of these sensors, residual strains, temperature changes, and degree of cure of the resin were monitored. In addition to having a higher modulus of elasticity and ultimate strength, these new epoxy-hybrid nano-particle resin laminates showed minimal temperature increases during cure and smaller residual strains than the comparable vinyl-ester resin laminates.
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Tregnier, Claude. „Fins de parties : identification dans le transfert et achoppement de cure psychothérapeutique“. Thesis, Paris 5, 2014. http://www.theses.fr/2014PA05H124.

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La thèse traite des arrêts non éclairés de cure psychothérapeutique, c'est-à-dire des interruptions définitives à l'initiative exclusive du patient ou de la patiente, sans discussion avec le clinicien ou la clinicienne. Pour la première fois, une telle étude est basée sur des témoignages de patient(e)s, recueillis lors d'entretiens cliniques après consentement éclairé. Au plan théorique, l'étude s'appuie sur une approche métapsychologique informationnelle originale de la psyché comme organe de modélisation du monde par la réalité psychique, inspirée par un historique de l'évolution des notions de projection et d'identification projective en psychanalyse. Pour l'ensemble du panel clinique de l'étude, les arrêts non éclairés de cure résultent systématiquement de la perte de confiance du patient en raison d'un trait disqualifiant imputé au clinicien par transfert objectal ou par identification projective, avec une conviction remarquablement forte, inébranlable et durable que le trait en question appartient effectivement à la personne du clinicien. Au terme de l'étude, il apparaît que les personnes ayant traversé des expériences traumatiques relationnelles dans leur enfance (rupture de continuité relationnelle avec l'environnement parental) pourraient être particulièrement exposées aux risques d'arrêts non éclairés lorsqu'elles entreprennent une psychanalyse ou une psychothérapie. En conséquence, l'étude propose des mesures de métacommunication préventive et curative visant à réduire un tel risque. Ces conclusions nécessiteraient d'être affinées par une recherche ultérieure plus large incluant notamment une comparaison avec une population témoin de patient(e)s n'ayant pas connu d'arrêts non éclairés dans leur(s) cure(s), afin de préciser davantage les spécificités des patient(e)s qui en provoquent et de mieux caractériser les traumatismes relationnels précoces dont ces dernier(e)s ont pu faire l'expérience
This work is about unilateral treatment abortions by the patient, occurring without preliminary discussion with the therapist. For the first time, such a research is based upon testimonies from patients collected during clinical interviews with their informed consent. Theoretically, the study relies on an original informational approach of the psyche as an organ which models the outside world by the psychical reality, approach inspired by an historical survey of projection and projective identification psychoanalytical concepts evolutions. For the entire study sample, unilateral treatment abortion by the patient always derives from loss of confidence in the therapist caused by the attribution to him or her of a disqualifying feature through object transference or projective identification channel, with a remarkably strong, unwavering and long-lasting conviction that the disqualifying feature truly belongs to the therapist. At the end of the study, it appears that the persons who have had relational traumatic experiences during childhood (breaks in the continuity of relations with parental environment) would be particularly prone to unilateral treatment abortions during a psychoanalysis or a psychotherapy. Consequently, the study proposes preventive and curatives measures of metacommunication in order to reduce risk of treatment abortion. The conclusions of this study would require further wider research, involving particularly a control population of patients who never experimented unilateral treatment abortion during their psychoanalysis/psychotherapy, in order to more clearly identify the specificities of the patients who provoke such treatment abortions and the exact nature of the relational trauma which they may have experimented during childhood
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Patsora, Iryna, Dmytro Tatarchuk, Henning Heuer und Susanne Hillmann. „Study of a Particle Based Films Cure Process by High-Frequency Eddy Current Spectroscopy“. Multidisciplinary Digital Publishing Institute, 2016. https://tud.qucosa.de/id/qucosa%3A30206.

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Particle-based films are today an important part of various designs and they are implemented in structures as conductive parts, i.e., conductive paste printing in the manufacture of Li-ion batteries, solar cells or resistive paste printing in IC. Recently, particle based films were also implemented in the 3D printing technique, and are particularly important for use in aircraft, wind power, and the automotive industry when incorporated onto the surface of composite structures for protection against damages caused by a lightning strike. A crucial issue for the lightning protection area is to realize films with high homogeneity of electrical resistance where an in-situ noninvasive method has to be elaborated for quality monitoring to avoid undesirable financial and time costs. In this work the drying process of particle based films was investigated by high-frequency eddy current (HFEC) spectroscopy in order to work out an automated in-situ quality monitoring method with a focus on the electrical resistance of the films. Different types of particle based films deposited on dielectric and carbon fiber reinforced plastic substrates were investigated in the present study and results show that the HFEC method offers a good opportunity to monitor the overall drying process of particle based films. Based on that, an algorithm was developed, allowing prediction of the final electrical resistance of the particle based films throughout the drying process, and was successfully implemented in a prototype system based on the EddyCus® HFEC device platform presented in this work. This prototype is the first solution for a portable system allowing HFEC measurement on huge and uneven surfaces.
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Patsora, Iryna, Dmytro Tatarchuk, Henning Heuer und Susanne Hillmann. „Study of a Particle Based Films Cure Process by High-Frequency Eddy Current Spectroscopy“. Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-220609.

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Particle-based films are today an important part of various designs and they are implemented in structures as conductive parts, i.e., conductive paste printing in the manufacture of Li-ion batteries, solar cells or resistive paste printing in IC. Recently, particle based films were also implemented in the 3D printing technique, and are particularly important for use in aircraft, wind power, and the automotive industry when incorporated onto the surface of composite structures for protection against damages caused by a lightning strike. A crucial issue for the lightning protection area is to realize films with high homogeneity of electrical resistance where an in-situ noninvasive method has to be elaborated for quality monitoring to avoid undesirable financial and time costs. In this work the drying process of particle based films was investigated by high-frequency eddy current (HFEC) spectroscopy in order to work out an automated in-situ quality monitoring method with a focus on the electrical resistance of the films. Different types of particle based films deposited on dielectric and carbon fiber reinforced plastic substrates were investigated in the present study and results show that the HFEC method offers a good opportunity to monitor the overall drying process of particle based films. Based on that, an algorithm was developed, allowing prediction of the final electrical resistance of the particle based films throughout the drying process, and was successfully implemented in a prototype system based on the EddyCus® HFEC device platform presented in this work. This prototype is the first solution for a portable system allowing HFEC measurement on huge and uneven surfaces.
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9

Berman, Salomon. „Rowing against the stream elite regeneration and the question of regime continuation in Cuba /“. Connect to Electronic Thesis (ProQuest) Connect to Electronic Thesis (CONTENTdm), 2008. http://worldcat.org/oclc/436215264/viewonline.

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Wittmer, Stephan. „Caractérisation du mélange dans une cuve agitée par trajectographie“. Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL037N.

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Dans cette thèse, nous essayons de développer de nouveaux outils pour la caractérisation des processus de mélange et ceci dans une approche lagrangienne. L’objectif est de trouver de l'information utile contenue dans la longue trajectoire d'une particule représentant un élément de fluide d'un écoulement turbulent. Les écoulements étudiés sont ceux induits par des turbines Rushton et à Pales inclinées dans une cuve agitée de 20 litres. Un dispositif expérimental utilisant des systèmes vidéo et d'analyse d'images a été développé pour suivre une petite particule, neutre de densité, dans trois dimensions spatiales pendant 1 heure. La qualité de suivi est testée par l'étude de sa densité de présence dans la cuve. La question principale est comment les champs de turbulences de vitesse s'impriment dans des propriétés géométriques et dynamiques des trajectoires. Par exemple, elles visualisent les courants de recirculation de l'écoulement secondaire et la présence des chicanes par leurs intersections avec des surfaces fictives de sections de Poincaré. Parmi les études se trouvent des analyses spectrales de quelques séries temporelles, différentes sortes de distributions lagrangiennes de longueurs, de temps et de vitesses, leurs valeurs moyennes et relations et leur dépendance vis-à-vis de la vitesse d'agitation. Cette information lagrangienne est comparée avec les caractéristiques plus classiques utilisées dans des cuves agitées comme le temps de recirculation. Les résultats montrent des différences significatives selon le type de mobile d'agitation utilisé ce qui souligne que la méthode de suivi de particule est prometteuse pour obtenir des signatures de l'action du mobile d'agitation et de la nature du réacteur dans le mélangeage
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Bücher zum Thema "Partial cube"

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Garfinkel, Irwin. The feminization of poverty: Nature, causes, and a partial cure. [Madison]: University of Wisconsin--Madison, 1985.

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Sara, McLanahan, Hrsg. The feminization of poverty: Nature, causes and a partial cure. Madison]: University of Wisconsin--Madison, 1985.

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López, Onelio Ortega. Valor filosófico de los documentos del Partido Comunista de Cuba: Primer, segundo y tercer Congresos. La Habana: Editorial de Ciencias Sociales, 1990.

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Die Geschichte der kubanischen KP von 1925-1962. Frankfurt am Main: P. Lang, 1992.

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Aguilera, César Reynal. El soviet caribeño: La otra historia de la Revolución Cubana. Buenos Aires: B, 2018.

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Navarro Agüero, Enrique M., 1947- author, Hrsg. Alma de la nación cubana. La Habana: Casa Editorial Verde Olivo, 2014.

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Partido Comunista de Cuba. Congreso, Hrsg. Los fieles de Castro. Miami, Fla: Ediciones Cambio, 1991.

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Dávalos, Armando Hart. Cuba: Raíces del presente. Madrid: Ediciones Libertarias, 1999.

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Fidel, Castro. Informe central, discurso de clausura: V Congreso del Partido Comunista de Cuba. La Habana: Editora Politca, 1997.

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Fidel, Castro. Rapport central, discours de clôture: 5e Congrès du Parti Communiste de Cuba. La Habana: Editora Política, 1998.

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Buchteile zum Thema "Partial cube"

1

Hanusse, Nicolas, Sofian Maabout und Radu Tofan. „Revisiting the Partial Data Cube Materialization“. In Advances in Databases and Information Systems, 70–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23737-9_6.

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Ovchinnikov, Sergei. „Partial Cubes“. In Universitext, 127–81. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0797-3_5.

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Cardinal, Jean, und Stefan Felsner. „Covering Partial Cubes with Zones“. In Lecture Notes in Computer Science, 1–13. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13287-7_1.

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Albenque, Marie, und Kolja Knauer. „Convexity in Partial Cubes: The Hull Number“. In LATIN 2014: Theoretical Informatics, 421–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54423-1_37.

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Amaldi, Ugo. „Accelerators that Cure“. In Particle Accelerators: From Big Bang Physics to Hadron Therapy, 213–45. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08870-9_8.

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Lekkerkerker, Henk N. W., Remco Tuinier und Mark Vis. „Phase Behaviour of Colloidal Cubes Mixed with Depletants“. In Colloids and the Depletion Interaction, 319–42. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-52131-7_10.

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AbstractIn Chaps. 8 and 9 it was shown that the phase behaviour of anisotropic hard particles is considerably richer than that of hard spheres (see Sect. 3.2). Recent breakthroughs in colloidal synthesis allow the control of particle shapes and properties with high precision. This provides us with a constantly expanding library of new anisotropic building blocks, thus opening new avenues to explore colloidal self-assembly at a higher level of complexity [1, 2]. One of these intriguing novel systems is cube-like colloids. In this chapter, a selective overview is given on the current knowledge of the phase behaviour of cube-like colloids with and without added depletants.
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Dehne, Frank, Todd Eavis und Andrew Rau-Chaplin. „Computing Partial Data Cubes for Parallel Data Warehousing Applications“. In Recent Advances in Parallel Virtual Machine and Message Passing Interface, 319–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45417-9_44.

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DeCarlo, Doug. „Towards Real-Time Cue Integration by Using Partial Results“. In Computer Vision — ECCV 2002, 327–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-47979-1_22.

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Murad, Miada, Yuan Tian und Mznah A. Rodhaan. „Computationally Efficient Fine-Grain Cube CP-ABE Scheme with Partially Hidden Access Structure“. In Communications in Computer and Information Science, 135–56. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7530-3_10.

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Carter, Cynthia. „be cute, play with dolls, and stick to tea parties“. In Journalism, Gender and Power, 236–50. London ; New York : Routledge, 2019.: Routledge, 2019. http://dx.doi.org/10.4324/9781315179520-17.

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Konferenzberichte zum Thema "Partial cube"

1

Moreira, Angelica Aparecida, und Joubert de Castro Lima. „Full and partial data cube computation and representation over commodity PCs“. In 2012 IEEE 13th International Conference on Information Reuse & Integration (IRI). IEEE, 2012. http://dx.doi.org/10.1109/iri.2012.6303074.

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Alawadhi, Nader, und Ozgur Sinanoglu. „Revival of partial scan: Test cube analysis driven conversion of flip-flops“. In 2011 IEEE VLSI Test Symposium (VTS). IEEE, 2011. http://dx.doi.org/10.1109/vts.2011.5783731.

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Fauzan, Akhmad, Umar Khayam, Suwarno, Masahiro Kozako und Masayuki Hikita. „Design and Fabrication of 3-D Cube UHF Antenna for Partial Discharge Detection“. In 2018 Condition Monitoring and Diagnosis (CMD). IEEE, 2018. http://dx.doi.org/10.1109/cmd.2018.8535817.

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Zhou, Zheng, Jian Liu und Jinwen Tian. „Real-time hyperspectral image cube compression combining adaptive classification and partial transform coding“. In 2006 8th international Conference on Signal Processing. IEEE, 2006. http://dx.doi.org/10.1109/icosp.2006.345561.

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Xia, Ying, Ting Ting Luo, Xu Zhang und Hae Young Bae. „A Parallel Adaptive Partial Materialization Method of Data Cube Based on Genetic Algorithm“. In Computer Science and Technology 2016. Science & Engineering Research Support soCiety, 2016. http://dx.doi.org/10.14257/astl.2016.123.29.

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Guo, Tongcui, Guihai Wang, Xinmin Song, Dongbo He, Jian Zhang, Weiliang Liu und Xili Deng. „Application of Wide-Azimuth Anisotropy Inversion Predicting Carbonate Fracture Intensity and Direction“. In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207651-ms.

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Abstract Fractures in carbonate rock are both storing reservoirs and migrating channels for oil and gas, so such fractures are one of the key targets for oil exploration and development. Traditional fracture prediction methods by seismic data include ant tracking cube, coherence cube and other seismic attributes. Fractures predicted by these methods are less accurate. This paper introduces a wide-azimuth anisotropic inversion method to effectively predict the fracture density and direction in carbonates. a wide-azimuth seismic anisotropy inversion workflow is established to predict the fractures in carbonates, and consequently the fractured zones in the target layer. The key steps include: (1) carry out quality control and optimization of wide-azimuth seismic gathers; (2) conduct pre-stack simultaneous inversion of pre-stack seismic data at partial sub-offsets and sub-azimuths to obtain the Vp/Vs of the azimuths; (3) use Azimuthal Fourier Coefficient to calculate the anisotropic gradient and direction. Based on the anisotropic intensity and direction and elastic parameters in the study area, the density and direction of fractures are obtained. The prediction results show that in the study area, nearly SN-striking fractures are developed, which are chiefly tectonic fractures, and consistent with the imaging logging results. It has been proved that the method is reasonable and feasible, and the accuracy of fracture prediction is improved.
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De la Trinidad, C. A. „Exploring the effects of repetitive corrugation and strengthening on alloy A5083 using X-ray diffraction techniques“. In Superplasticity in Advanced Materials. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/97816449025615-42.

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Abstract. Aluminum alloys are highly versatile materials and their behavior can be improved by severe plastic deformation. X-Ray Diffraction (XRD) is a key tool for studying the microstructural changes and the evolution of the crystalline structure during this process. This combination of processing techniques helped the development of high-performance aluminum alloys for various industrial applications. The objective was to determine a heat treatment to promote a new crystallographic texture of AA5083 under a severe plastic deformation process. The determination of this thermal ratio, as well as the crystallographic characterization of the material, were studied through XRD, thermo-diffraction, Rietveld analysis, and pole figures (PF). The results showed that using a partial recrystallization heat treatment combined with the RCS process favors obtaining a characteristic recrystallization and deformation texture (cube and brass component). Furthermore, the evolution of diffraction peaks intensities at different temperatures confirm that recrystallization takes place during the process. Finally, the phases present in the A5083 alloy were determined by XRD.
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Merkle, Fritz. „Interferometry with the European Very Large Telescope“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.ma3.

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In the present Very Large Telescope (VLT) linear array concept four independent telescopes of the 8-m class are coupled together. This offers the unique possibility to operate the telescopes as an optical and/or infrared long base-line interferometer. The first target for an interferometric operation is the infrared range from 5 to 20 μm and later a gradual expansion to shorter wavelengths. In the interferometric mode the gain of the 8-m diam single apertures of the VLT is only given, if adaptive optics is used for a real-time partial or full phase compensation of the degradations due to atmospheric turbulence. When the condition atmospheric coherence area > telescope diameter is not fulfilled, adaptive optics is a technique to restore full coherence over the whole pupil. The gain for the SNR in interferometry goes at least with the inverse cube of the point spread function. Therefore, no other parameter can bring about such an improvement. The correction problem is extremely severe at visible wavelengths due to the high temporal and spatial frequencies of the fluctuations. Instead of several thousand subapertures required in the visible for a full correction, only 100-200 subapertures have to be corrected in the infrared case. Additional to the phasing of the individual telescopes, the whole array has to be phased. In a system with independently mounted telescopes the longitudinal position of the pupil images and the effects of pupil foreshortening have to be corrected in addition to the pure path-length correction.
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Okada, Kazuya, und Akira Satoh. „Analysis of a Stokes Flow Past a Cube (Friction and Diffusion Coefficients for Brownian Dynamics Simulations)“. In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10549.

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Abstract Magnetorheological properties significantly depend on the regime of aggregate structures. In the case of cubic particles, closely-packed clusters that are significantly different from those for the case of spherical or rod-like particles are formed in the system since magnetic cube-like particles prefer a face-to-face contact with the neighboring particles. Therefore, a cubic particle suspension is expected to exhibit a sufficiently strong magnetorheological effect, which may be investigated by means of Brownian dynamics simulations. However, the translational and rotational diffusion (or friction) coefficients of a cube are not known and indispensable in order to develop this simulation technique. From this background, in the present study, we have analyzed the flow field around a cube in a Stokes flow regime in order to estimate the diffusion (or friction) coefficients of cube-like particles that are required for performing Brownian dynamics simulations of a cubic particle suspension. In the situation of a uniform flow field with a Reynolds number sufficiently smaller than unity, the force acts on the cube only in the flow field direction, and the torque acting on the cube may be regarded as negligible. In the situation of a rotational flow field with a sufficiently low Reynolds number, the torque acts on the cube only in the direction of angular velocity of the rotational flow field, and the force negligibly act on the cube. These characteristics are in significantly similar to those for the case of spheres in a Stokes flow situation. From these results, we may conclude that the diffusion coefficients of cube-like particles can be expressed by introducing a correction factor to those of the spherical particles.
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Fazal, Muhammad Adnan, Syed Hamza Ahmad, Arif Yousuf, Aziz ur Rehman, Sameer Mustafa Noor und Irfan Nazir. „Engineered Ultra-Low Invasion Loss Control Solution Allows Circulation, Ensuring Cement Placement and Zonal Isolation in Liner Cementing Jobs and Through Coiled Tubing – Case Studies“. In SPE 2023 Symposium Compilation. SPE, 2023. http://dx.doi.org/10.2118/217356-ms.

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Abstract The conventional loss cure techniques are largely reactive and include addition of coarse grade particle, fibrous material and other viscous pills that are lost into formation during loss cure attempts. Being highly invasive, these loss cure solutions block pore throats and line producing fractures causing considerable formation damage and loss of net asset value. Moreover, these techniques pose additional challenges while placing thru slim liners and coiled tubing (in rigless applications) due to elevated risk of getting the circulation ports plugged. Moreover, during the era of technological revolution and decarbonization, an effective and efficient solution aids to promote the practices producing low carbon emission. The proactive wellbore shielding loss cure is a particle size distribution-based LCM solution having excellent fluid loss properties and exhibiting low permeability barrier at the fluid-rock interface. The low permeable shielding effect offers less invasion across a broad range of pores (1microns to 4,000microns) and thereby protecting formation from any permanent impairment. The solution covers the wide range applications of loss cure throughout well life ensuring zonal isolation and saving significant rig time. Customized particle size distribution does allow LCM solution to be pumpable thru liner complying the allowable particle sizes (less than 1,000microns) and concentrations (upto 18 lbs/bbl) and for coiled tubing specialized applications with allowable particles size of 100 microns while maintaining rheological properties (Fluid Loss&lt;50 ml/30 min, 5lbs/100ft2&gt;Ty&lt;10lbs/100ft2 & PV&lt;90 cp). This paper demonstrates the working principle and practical applications of engineered solution for loss cure and successfully achieving zonal isolation in 7" liner being placed as pre-cement spacer in naturally fractured formation. The wellbore shielding pre-cement spacer ensured the cement rise above loss point thus achieving zonal isolation in partial to complete losses environment and helps in minimizing formation's impairment. The same approach was adopted to cure losses in rigless with coiled tubing in both carbonate and sandstone reservoirs for well killing and zonal isolation without plugging the CT BHA and circulation ports while complying design requirements.
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Berichte der Organisationen zum Thema "Partial cube"

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Romero, Antonio. The Political Dialogue and Cooperation Agreement and relations between European Union and Cuba. Fundación Carolina, Februar 2022. http://dx.doi.org/10.33960/issn-e.1885-9119.dtff01en.

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This document makes an assessment of the Political Dialogue and Cooperation Agreement (PDCA) between Cuba and the European Union (EU) in its four years of validity, and of the evolution of political and economic relations between both parties. The analysis is structured in five headings that address the background, determinants and significance of the PDCA between Cuba and the EU; the main elements discussed in the political dialogue —and in thematic dialogue— between the two parties since 2018, and the central aspects of trade, investment and cooperation relations between Cuba and the EU. The report concludes that, unlike the United States, the EU is able to support the complex process of economic and institutional transformations underway in Cuba, in four fundamental areas: i) technical assistance and advice for the design and implementation of public policies, macroeconomic management, decentralisation and local development; ii) cooperation to fight climate change and transform Cuba’s productive and technological structure; iii) the promotion and encouragement of foreign investment flows from Europe, targeting key productive sectors; and iv) the exploration of financial opportunities for Cuba through the European Investment Bank (EIB) under the current PDCA.
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Anderson, Gerald L., und Kalman Peleg. Precision Cropping by Remotely Sensed Prorotype Plots and Calibration in the Complex Domain. United States Department of Agriculture, Dezember 2002. http://dx.doi.org/10.32747/2002.7585193.bard.

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This research report describes a methodology whereby multi-spectral and hyperspectral imagery from remote sensing, is used for deriving predicted field maps of selected plant growth attributes which are required for precision cropping. A major task in precision cropping is to establish areas of the field that differ from the rest of the field and share a common characteristic. Yield distribution f maps can be prepared by yield monitors, which are available for some harvester types. Other field attributes of interest in precision cropping, e.g. soil properties, leaf Nitrate, biomass etc. are obtained by manual sampling of the filed in a grid pattern. Maps of various field attributes are then prepared from these samples by the "Inverse Distance" interpolation method or by Kriging. An improved interpolation method was developed which is based on minimizing the overall curvature of the resulting map. Such maps are the ground truth reference, used for training the algorithm that generates the predicted field maps from remote sensing imagery. Both the reference and the predicted maps are stratified into "Prototype Plots", e.g. 15xl5 blocks of 2m pixels whereby the block size is 30x30m. This averaging reduces the datasets to manageable size and significantly improves the typically poor repeatability of remote sensing imaging systems. In the first two years of the project we used the Normalized Difference Vegetation Index (NDVI), for generating predicted yield maps of sugar beets and com. The NDVI was computed from image cubes of three spectral bands, generated by an optically filtered three camera video imaging system. A two dimensional FFT based regression model Y=f(X), was used wherein Y was the reference map and X=NDVI was the predictor. The FFT regression method applies the "Wavelet Based", "Pixel Block" and "Image Rotation" transforms to the reference and remote images, prior to the Fast - Fourier Transform (FFT) Regression method with the "Phase Lock" option. A complex domain based map Yfft is derived by least squares minimization between the amplitude matrices of X and Y, via the 2D FFT. For one time predictions, the phase matrix of Y is combined with the amplitude matrix ofYfft, whereby an improved predicted map Yplock is formed. Usually, the residuals of Y plock versus Y are about half of the values of Yfft versus Y. For long term predictions, the phase matrix of a "field mask" is combined with the amplitude matrices of the reference image Y and the predicted image Yfft. The field mask is a binary image of a pre-selected region of interest in X and Y. The resultant maps Ypref and Ypred aremodified versions of Y and Yfft respectively. The residuals of Ypred versus Ypref are even lower than the residuals of Yplock versus Y. The maps, Ypref and Ypred represent a close consensus of two independent imaging methods which "view" the same target. In the last two years of the project our remote sensing capability was expanded by addition of a CASI II airborne hyperspectral imaging system and an ASD hyperspectral radiometer. Unfortunately, the cross-noice and poor repeatability problem we had in multi-spectral imaging was exasperated in hyperspectral imaging. We have been able to overcome this problem by over-flying each field twice in rapid succession and developing the Repeatability Index (RI). The RI quantifies the repeatability of each spectral band in the hyperspectral image cube. Thereby, it is possible to select the bands of higher repeatability for inclusion in the prediction model while bands of low repeatability are excluded. Further segregation of high and low repeatability bands takes place in the prediction model algorithm, which is based on a combination of a "Genetic Algorithm" and Partial Least Squares", (PLS-GA). In summary, modus operandi was developed, for deriving important plant growth attribute maps (yield, leaf nitrate, biomass and sugar percent in beets), from remote sensing imagery, with sufficient accuracy for precision cropping applications. This achievement is remarkable, given the inherently high cross-noice between the reference and remote imagery as well as the highly non-repeatable nature of remote sensing systems. The above methodologies may be readily adopted by commercial companies, which specialize in proving remotely sensed data to farmers.
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Angel, Sergio, Omara Ruíz Urquiola, José Raúl Gallego, Alenmichel Aguiló, Leonardo Fernández, Dimas Castellanos, David Gómez, Maria Camila Herrera und Catalina Rodríguez. La eternización de la Revolución y su costo para la academia en Cuba. Editorial 4Métrica, Juni 2023. http://dx.doi.org/10.56650/9786289583120.

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El presente informe no constituye un resumen, ni un balance, de la marginación por motivos ideológicos o de cualquier índole en el sistema educativo cubano a partir de 1959. Es parte de un trabajo gradual y sistemático que mensualmente documenta dos casos (uno histórico y otro posterior a 2010) de víctimas de discriminación. También contiene el análisis de un discurso o instrumento programático que avale la represión en el ámbito de la enseñanza, así como incluye el examen de una regulación que atente contra derechos relacionados con la libertad académica.
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Zchori-Fein, Einat, Judith K. Brown und Nurit Katzir. Biocomplexity and Selective modulation of whitefly symbiotic composition. United States Department of Agriculture, Juni 2006. http://dx.doi.org/10.32747/2006.7591733.bard.

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Whiteflies are sap-sucking insects that harbor obligatory symbiotic bacteria to fulfill their dietary needs, as well as a facultative microbial community with diverse bacterial species. The sweetpotato whitefly Bemisia tabaci (Gennadius) is a severe agricultural pest in many parts of the world. This speciesconsists of several biotypes that have been distinguished largely on the basis of biochemical or molecular diagnostics, but whose biological significance is still unclear. The original objectives of the project were (i) to identify the specific complement of prokaryotic endosymbionts associated with select, well-studied, biologically and phylogeographically representative biotypes of B. tabaci, and (ii) to attempt to 'cure’ select biotypes of certain symbionts to permit assessment of the affect of curing on whitefly fitness, gene flow, host plant preference, and virus transmission competency.To identify the diversity of bacterial community associated with a suite of phylogeographically-diverseB. tabaci, a total of 107 populations were screened using general Bacteria primers for the 16S rRNA encoding gene in a PCR. Sequence comparisons with the available databases revealed the presence of bacteria classified in the: Proteobacteria (66%), Firmicutes (25.70%), Actinobacteria (3.7%), Chlamydiae (2.75%) and Bacteroidetes (<1%). Among previously identified bacteria, such as the primary symbiont Portiera aleyrodidarum, and the secondary symbionts Hamiltonella, Cardinium and Wolbachia, a Rickettsia sp. was detected for the first time in this insect family. The distribution, transmission, and localization of the Rickettsia were studied using PCR and fluorescence in situ hybridization (FISH). Rickettsia was found in all 20 Israeli B. tabaci populations screened as well as some populations screened in the Arizona laboratory, but not in all individuals within each population. FISH analysis of B. tabaci eggs, nymphs and adults, revealed a unique concentration of Rickettsia around the gut and follicle cells as well as its random distribution in the haemolymph, but absence from the primary symbiont housing cells, the bacteriocytes. Rickettsia vertical transmission on the one hand and its partial within-population infection on the other suggest a phenotype that is advantageous under certain conditions but may be deleterious enough to prevent fixation under others.To test for the possible involvement of Wolbachia and Cardiniumin the reproductive isolation of different B. tabacibiotypes, reciprocal crosses were preformed among populations of the Cardinium-infected, Wolbachia-infected and uninfected populations. The crosses results demonstrated that phylogeographically divergent B. tabaci are reproductively competent and that cytoplasmic incompatibility inducer-bacteria (Wolbachia and Cardinium) both interfered with, and/or rescued CI induced by one another, effectively facilitating bidirectional female offspring production in the latter scenario.This knowledge has implications to multitrophic interactions, gene flow, speciation, fitness, natural enemy interactions, and possibly, host preference and virus transmission. Although extensive and creative attempts undertaken in both laboratories to cure whiteflies of non-primary symbionts have failed, our finding of naturally uninfected individuals have permitted the establishment of Rickettsia-, Wolbachia- and Cardinium-freeB. tabaci lines, which are been employed to address various biological questions, including determining the role of these bacteria in whitefly host biology.
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Informe MERCOSUR No. 14 (2008-2009). Inter-American Development Bank, Dezember 2009. http://dx.doi.org/10.18235/0009484.

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El período que cubre el Informe MERCOSUR N° 14 (julio de 2008 - junio de 2009) estuvo marcado por la crisis internacional. La fase inflacionaria de dicha crisis -que se desarrolló entre agosto de 2007 y junio de 2008- alimentó algunas tendencias expansivas en los países del bloque. Una vez agotada dicha fase, el desempeño del MERCOSUR acusó los efectos negativos provenientes de la economía mundial. A partir del cuarto trimestre de 2008, el colapso del nivel de actividad y del comercio globales, la caída en los precios de los productos básicos y las dificultades de financiamento se reflejaron a través de tendencias recesivas al interior del bloque. Sin embargo, desde marzo de 2009 fueron evidentes señales de estabilización, aunque no de clara recuperación en la economía mundial, que delinean un escenario internacional con diferencias respecto del período previo.
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