Bibliografías temáticas / TAB2

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Literatura académica sobre el tema "TAB2"

Autor: Grafiati
Publicado: 11 de marzo de 2023

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Artículos de revistas sobre el tema "TAB2"

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CHEUNG, Peter C. F., Angel R. NEBREDA y Philip COHEN. "TAB3, a new binding partner of the protein kinase TAK1". Biochemical Journal 378, n.º 1 (15 de febrero de 2004): 27–34. http://dx.doi.org/10.1042/bj20031794.

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We have identified a new binding partner of the TGFβ (transforming growth factor-β)-activated protein kinase (TAK1), termed TAB3 (TAK1-binding protein-3), which shares 48% amino acid sequence identity with TAB2. Our results indicate that two distinct TAK1 complexes are present in cells. One comprises TAK1 complexed with TAB1 and TAB2, and the other TAK1 complexed with TAB1 and TAB3. Both complexes are activated in response to tumour necrosis factor-α or interleukin-1 in human epithelial KB cells or bacterial lipopolysaccharide in RAW264.7 macrophages, and are subject to feedback control by stress-activated protein kinase 2a (SAPK2a; also called p38α). The electrophoretic mobility of TAB2 and TAB3 decreases in response to these agonists or osmotic shock, and is reversed by treatment with protein phosphatase-1. The decrease in mobility of TAB3 is prevented if the cells are incubated with SB 203580 before stimulation, but treatment with SB 203580 produces forms of TAB2 with a mobility intermediate between that observed for TAB2 in unstimulated and stimulated cells. Similar results were obtained in embryonic fibroblasts from mice deficient in SAPK2a/p38α. Our results indicate that TAB3 is phosphorylated via the SAPK2a/p38α pathway, whereas TAB2 is phosphorylated at two or more sites by both an SAPK2a/p38α-dependent and an SB 203580-independent kinase. The SAPK2a/p38α-mediated phosphorylation of TAB2 and TAB3 may contribute to the SAPK2a/p38α-mediated feedback control of TAK1 activity that also involves the phosphorylation of TAB1. We also show that the agonist-induced activation of TAK1 complexes requires the phosphorylation of the TAK1 catalytic subunit at a serine/threonine residue(s).
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Zhang, Jiazhen, Thomas Macartney, Mark Peggie y Philip Cohen. "Interleukin-1 and TRAF6-dependent activation of TAK1 in the absence of TAB2 and TAB3". Biochemical Journal 474, n.º 13 (26 de junio de 2017): 2235–48. http://dx.doi.org/10.1042/bcj20170288.

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Interleukin-1 (IL-1) signaling induces the formation of Lys63-linked ubiquitin (K63-Ub) chains, which are thought to activate the ‘master’ protein kinase TGFβ-activated kinase 1 (TAK1) by interacting with its TAK1-binding 2 (TAB2) and TAB3 subunits. Here, we report that IL-1β can also activate the TAB1–TAK1 heterodimer present in TAB2/TAB3 double knockout (DKO) IL-1 receptor-expressing cells. The IL-1β-dependent activation of the TAB1–TAK1 heterodimer in TAB2/3 DKO cells is required for the expression and E3 ligase activity of tumor necrosis factor receptor-associated factor 6 (TRAF6) and is reduced by the small interfering RNA (siRNA) knockdown of ubiquitin conjugating 13 (Ubc13), an E2-conjugating enzyme that directs the formation of K63-Ub chains. IL-1β signaling was restored to TAB1/2/3 triple KO cells by the re-expression of either TAB1 or TAB2, but not by an ubiquitin binding-defective mutant of TAB2. We conclude that IL-1β can induce the activation of TAK1 in two ways, only one of which requires the binding of K63-Ub chains to TAB2/3. The early IL-1β-stimulated, TAK1-dependent activation of p38α mitogen-activated protein (MAP) kinase and the canonical IκB kinase (IKK) complex, as well as the NF-κB-dependent transcription of immediate early genes, was similar in TAB2/3 DKO cells and TAB2/3-expressing cells. However, in contrast with TAB2/3-expressing cells, IL-1β signaling was transient in TAB2/3 DKO cells, and the activation of c-Jun N-terminal kinase 1 (JNK1), JNK2 and p38γ was greatly reduced at all times. These observations indicate a role for TAB2/3 in directing the TAK1-dependent activation of MAP kinase kinases that switch on JNK1/2 and p38γ MAP kinases. These observations and the transient activation of the TAB1–TAK1 heterodimer may explain why IL-1β-dependent IL-8 mRNA formation was abolished in TAB2/3 DKO cells.
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Mendoza, Heidi, David G. Campbell, Kerry Burness, James Hastie, Natalia Ronkina, Jae-Hyuck Shim, J. Simon C. Arthur et al. "Roles for TAB1 in regulating the IL-1-dependent phosphorylation of the TAB3 regulatory subunit and activity of the TAK1 complex". Biochemical Journal 409, n.º 3 (15 de enero de 2008): 711–22. http://dx.doi.org/10.1042/bj20071149.

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The protein kinase TAK1 (transforming growth factor-β-activated kinase 1), which has been implicated in the activation of MAPK (mitogen-activated protein kinase) cascades and the production of inflammatory mediators by LPS (lipopolysaccharide), IL-1 (interleukin 1) and TNF (tumour necrosis factor), comprises the catalytic subunit complexed to the regulatory subunits, termed TAB (TAK1-binding subunit) 1 and either TAB2 or TAB3. We have previously identified a feedback-control mechanism by which p38α MAPK down-regulates TAK1 and showed that p38α MAPK phosphorylates TAB1 at Ser423 and Thr431. In the present study, we identified two IL-1-stimulated phosphorylation sites on TAB2 (Ser372 and Ser524) and three on TAB3 (Ser60, Thr404 and Ser506) in human IL-1R cells [HEK-293 (human embryonic kidney) cells that stably express the IL-1 receptor] and MEFs (mouse embryonic fibroblasts). Ser372 and Ser524 of TAB2 are not phosphorylated by pathways dependent on p38α/β MAPKs, ERK1/2 (extracellular-signal-regulated kinase 1/2) and JNK1/2 (c-Jun N-terminal kinase 1/2). In contrast, Ser60 and Thr404 of TAB3 appear to be phosphorylated directly by p38α MAPK, whereas Ser506 is phosphorylated by MAPKAP-K2/MAPKAP-K3 (MAPK-activated protein kinase 2 and 3), which are protein kinases activated by p38α MAPK. Studies using TAB1−/− MEFs indicate important roles for TAB1 in recruiting p38α MAPK to the TAK1 complex for the phosphorylation of TAB3 at Ser60 and Thr404 and in inhibiting the dephosphorylation of TAB3 at Ser506. TAB1 is also required to induce TAK1 catalytic activity, since neither IL-1 nor TNFα was able to stimulate detectable TAK1 activity in TAB1−/− MEFs. Surprisingly, the IL-1 and TNFα-stimulated activation of MAPK cascades and IκB (inhibitor of nuclear factor κB) kinases were similar in TAB1−/−, MEKK3−/− [MAPK/ERK (extracellular-signal-regulated kinase) kinase kinase 3] and wild-type MEFs, suggesting that another MAP3K (MAPK kinase kinase) may mediate the IL-1/TNFα-induced activation of these signalling pathways in TAB1−/− and MEKK3−/− MEFs.
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Grimsey, Neil J., Berenice Aguilar, Thomas H. Smith, Phillip Le, Amanda L. Soohoo, Manojkumar A. Puthenveedu, Victor Nizet y JoAnn Trejo. "Ubiquitin plays an atypical role in GPCR-induced p38 MAP kinase activation on endosomes". Journal of Cell Biology 210, n.º 7 (21 de septiembre de 2015): 1117–31. http://dx.doi.org/10.1083/jcb.201504007.

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Protease-activated receptor 1 (PAR1) is a G protein–coupled receptor (GPCR) for thrombin and promotes inflammatory responses through multiple pathways including p38 mitogen-activated protein kinase signaling. The mechanisms that govern PAR1-induced p38 activation remain unclear. Here, we define an atypical ubiquitin-dependent pathway for p38 activation used by PAR1 that regulates endothelial barrier permeability. Activated PAR1 K63-linked ubiquitination is mediated by the NEDD4-2 E3 ubiquitin ligase and initiated recruitment of transforming growth factor-β–activated protein kinase-1 binding protein-2 (TAB2). The ubiquitin-binding domain of TAB2 was essential for recruitment to PAR1-containing endosomes. TAB2 associated with TAB1, which induced p38 activation independent of MKK3 and MKK6. The P2Y1 purinergic GPCR also stimulated p38 activation via NEDD4-2–mediated ubiquitination and TAB1–TAB2. TAB1–TAB2-dependent p38 activation was critical for PAR1-promoted endothelial barrier permeability in vitro, and p38 signaling was required for PAR1-induced vascular leakage in vivo. These studies define an atypical ubiquitin-mediated signaling pathway used by a subset of GPCRs that regulates endosomal p38 signaling and endothelial barrier disruption.
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Morioka, Sho, Maiko Inagaki, Yoshihiro Komatsu, Yuji Mishina, Kunihiro Matsumoto y Jun Ninomiya-Tsuji. "TAK1 kinase signaling regulates embryonic angiogenesis by modulating endothelial cell survival and migration". Blood 120, n.º 18 (1 de noviembre de 2012): 3846–57. http://dx.doi.org/10.1182/blood-2012-03-416198.

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Abstract TGF-β activated kinase 1 (TAK1) is a mediator of various cytokine signaling pathways. Germline deficiency of Tak1 causes multiple abnormalities, including dilated blood vessels at midgestation. However, the mechanisms by which TAK1 regulates vessel formation have not been elucidated. TAK1 binding proteins 1 and 2 (TAB1 and TAB2) are activators of TAK1, but their roles in embryonic TAK1 signaling have not been determined. In the present study, we characterized mouse embryos harboring endothelial-specific deletions of Tak1, Tab1, or Tab2 and found that endothelial TAK1 and TAB2, but not TAB1, were critically involved in vascular formation. TAK1 deficiency in endothelial cells caused increased cell death and vessel regression at embryonic day 10.5 (E10.5). Deletion of TNF signaling largely rescued endothelial cell death in TAK1-deficient embryos at E10.5. However, embryos deficient in both TAK1 and TNF signaling still exhibited dilated capillary networks at E12.5. TAB2 deficiency caused reduced TAK1 activity, resulting in abnormal capillary blood vessels, similar to the compound deficiency of TAK1 and TNF signaling. Ablation of either TAK1 or TAB2 impaired cell migration and tube formation. Our results show that endothelial TAK1 signaling is important for 2 biologic processes in angiogenesis: inhibiting TNF-dependent endothelial cell death and promoting TNF-independent angiogenic cell migration.
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Sanjo, Hideki, Kiyoshi Takeda, Tohru Tsujimura, Jun Ninomiya-Tsuji, Kunihiro Matsumoto y Shizuo Akira. "TAB2 Is Essential for Prevention of Apoptosis in Fetal Liver but Not for Interleukin-1 Signaling". Molecular and Cellular Biology 23, n.º 4 (15 de febrero de 2003): 1231–38. http://dx.doi.org/10.1128/mcb.23.4.1231-1238.2003.

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ABSTRACT The proinflammatory cytokine interleukin-1 (IL-1) transmits a signal via several critical cytoplasmic proteins such as MyD88, IRAKs and TRAF6. Recently, serine/threonine kinase TAK1 and TAK1 binding protein 1 and 2 (TAB1/2) have been identified as molecules involved in IL-1-induced TRAF6-mediated activation of AP-1 and NF-κB via mitogen-activated protein (MAP) kinases and IκB kinases, respectively. However, their physiological functions remain to be clarified. To elucidate their roles in vivo, we generated TAB2-deficient mice. The TAB2 deficiency was embryonic lethal due to liver degeneration and apoptosis. This phenotype was similar to that of NF-κB p65-, IKKβ-, and NEMO/IKKγ-deficient mice. However, the IL-1-induced activation of NF-κB and MAP kinases was not impaired in TAB2-deficient embryonic fibroblasts. These findings demonstrate that TAB2 is essential for embryonic development through prevention of liver apoptosis but not for the IL-1 receptor-mediated signaling pathway.
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Makarova, O. V., L. P. Polyakova, E. G. Polyakov, A. A. Shevyryov y A. V. Arakcheeva. "Phase composition of cathodic deposits synthesized in flinak-k2taf7-kbf4 melt". Journal of Mining and Metallurgy, Section B: Metallurgy 39, n.º 1-2 (2003): 261–67. http://dx.doi.org/10.2298/jmmb0302261m.

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The phase composition of cathodic deposits synthesized from FLINAK-K2TaF7-KBF4 melt has been studied by the X-ray diffraction method. It is shown that boron content in the electrodeposit grows as the cathodic potential is increased from peak R1 to peak R4 in the voltammogram. The scheme of changes in the phase composition depending on the increasing current density is given as follows: {?-Ta + Ta2B}R1 ? {?-Ta + (Ta3B4 TaB)}R2 ? {TaB2}R3 ? {TaB2 + B}R4.
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Criollo, Alfredo, Mireia Niso-Santano, Shoaib Ahmad Malik, Mickael Michaud, Eugenia Morselli, Guillermo Mariño, Sylvie Lachkar et al. "Inhibition of autophagy by TAB2 and TAB3". EMBO Journal 30, n.º 24 (11 de noviembre de 2011): 4908–20. http://dx.doi.org/10.1038/emboj.2011.413.

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Jiang, Zhengfan, Jun Ninomiya-Tsuji, Youcun Qian, Kunihiro Matsumoto y Xiaoxia Li. "Interleukin-1 (IL-1) Receptor-Associated Kinase-Dependent IL-1-Induced Signaling Complexes Phosphorylate TAK1 and TAB2 at the Plasma Membrane and Activate TAK1 in the Cytosol". Molecular and Cellular Biology 22, n.º 20 (15 de octubre de 2002): 7158–67. http://dx.doi.org/10.1128/mcb.22.20.7158-7167.2002.

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ABSTRACT Interleukin-1 (IL-1) receptor-associated kinase (IRAK) plays an important role in the sequential formation and activation of IL-1-induced signaling complexes. Previous studies showed that IRAK is recruited to the IL-1-receptor complex, where it is hyperphosphorylated. We now find that the phosphorylated IRAK in turn recruits TRAF6 to the receptor complex (complex I), which differs from the previous concept that IRAK interacts with TRAF6 after it leaves the receptor. IRAK then brings TRAF6 to TAK1, TAB1, and TAB2, which are preassociated on the membrane before stimulation to form the membrane-associated complex II. The formation of complex II leads to the phosphorylation of TAK1 and TAB2 on the membrane by an unknown kinase, followed by the dissociation of TRAF6-TAK1-TAB1-TAB2 (complex III) from IRAK and consequent translocation of complex III to the cytosol. The formation of complex III and its interaction with additional cytosolic factors lead to the activation of TAK1, resulting in NF-κB and JNK activation. Phosphorylated IRAK remains on the membrane and eventually is ubiquitinated and degraded. Taken together, the new data reveal that IRAK plays a critical role in mediating the association and dissociation of IL-1-induced signaling complexes, functioning as an organizer and transporter in IL-1-dependent signaling.
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Lei, X., N. Han, X. Xiao, Q. Jin, B. He y J. Wang. "Enterovirus 71 3C Inhibits Cytokine Expression through Cleavage of the TAK1/TAB1/TAB2/TAB3 Complex". Journal of Virology 88, n.º 17 (18 de junio de 2014): 9830–41. http://dx.doi.org/10.1128/jvi.01425-14.

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Tesis sobre el tema "TAB2"

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Шелест, Ігор Владиславович, Игорь Владиславович Шелест, Ihor Vladyslavovych Shelest, Ярослав Олегович Кравченко, Ярослав Олегович Кравченко, Yaroslav Olehovych Kravchenko, Володимир Володимирович Буранич, Владимир Владимирович Буранич, Volodymyr Volodymyrovych Buranych y Д. Ю. Бровко. "Аналіз впливу параметрів магнетронного розпилення на формування наноструктурних покриттів TaB2". Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67912.

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Тонкі покриття на основі боридів перехідних металів мають високу температуру плавлення та твердість, і знайшли широкий діапазон використання у різних галузях промисловості, за рахунок ефективного підвищення захисних властивостей. Для нанесення даних покриттів високу популярність здобув метод нереактивного магнетронного розпилення композиційних мішеней за участю іонного бомбардування, за рахунок високої варіативності в плані регулювання параметрів.
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2

Cabanillas, Arredondo Dennis Leonardo, Gonzáles Maydee Aracely Hernández, Artica Daniel Inocente, Vargas Yessenia Pilar Najarro y Luna Aldair Erlan Nestares. "Tabú Planner". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/626655.

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En el presente documento se detalla un proyecto que ha sido desarrollado durante varios meses, en donde se investigó rigurosamente el mercado y se determinó la viabilidad de este. El proyecto, llamado Tabú Planner, es una página web que servirá de intermediario entre una concentración diversificada de microempresarios proveedores de diferentes servicios para realizar eventos y miles de personas que tienen la necesidad de realizar un evento en específico. Esta página consiste en conectar a los microempresarios que no tienen un lugar determinado donde promocionar sus servicios y al usuario quien tampoco conoce proveedores para realizar su evento; se realizó la validación y se obtuvo como resultado que invierten mucho tiempo en la búsqueda, e incluso no los encuentran en las condiciones que ellos esperaban. Nosotros, como compañía, somos ese nexo importante para que las necesidades de ambos puedan suplirse. Para la inversión inicial se requerirá un importe de S/33,050 soles, el cual será aportada mayoritariamente por los accionistas, pero un importe menor será por tercero. Las fuentes de ingresos serán mediante el pago de membresías que irán desde los tres meses hasta los doce meses. Además, se contará con una oficina que servirá para tener un contacto directo con nuestros socios claves. Con respecto a la evaluación financiera, el negocio genera un Valor Presente Neto de 46,841.19. La TIR del proyecto asciende a 13%, con un retorno de inversión a partir del 1.76 años.
This document details our Project that has been developed throughout the past five months, in which we investigated the market and determined its viability. The project is called “Tabú Planner”, which is a website that serves as an intermediary between a diversified market of small entrepreneurs that provide different services related to the organization of events, and thousands of people who have the need to organize a specific event. This website relays to connect those entrepreneurs that doesn’t develop a promotion strategy in which the sell their products and those customers that doesn’t know which are the best providers. We realized the validation, and it resulted that customers waste too much time finding the suitable one, and even in the case they find them, it often doesn’t fulfill their expectations. Our company is the suitable relation to fulfill those necessities. For the initial investment, the amount of S/ 33,050 is needed, which will be mostly contributed by the shareholders, but a small margin will be invested by a third party. The income stream will be made through the payment of memberships that will offered from three months to twelve months. In addition, there is an office that serves to have direct contact with our key partners. Related to our financial evaluation, this project generates a Net Present Value of 46,841.19. The project’s TIR amount to 13% with a return over investment starting at 1.76 years.
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Whittley, Ian Murray. "Tabu search-revisited". Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251720.

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Albarracín, Sánchez Lucía Venecia, Reynoso Jessica Alessandra Palomino, León Luis Fabian Paredes, Saavedra Enrique Jean Pierre Sigueñas y Neciosup Fernando Manuel Velasquez. "Lava tu taba". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652887.

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Las zapatillas se han convertido en una de las prendas más importantes y preferidas por los consumidores. Así lo muestra ADEX, en su portal Data Trade (2020), en donde se identifica un crecimiento promedio, en los últimos tres años, del 35% en las importaciones de este calzado. Esta preferencia no se traduce a un simple gusto, sino va más allá al convertirse en una cultura, con consumidores más apasionados, perseguidores de nuevos lanzamientos y coleccionistas de ediciones limitadas. Por ende, brindan tiempo y dedicación en brindarles el cuidado adecuado. Ante esta necesidad, nace Lava Tu Taba, una solución para la limpieza especializada y cuidado de zapatillas. La propuesta combina la limpieza cuidadosa del calzado, con un sistema integral de delivery y el uso de tecnologías que permitirá reducir tiempos a nuestros clientes, así como brindarles seguridad necesaria al brindar un seguimiento completo a sus productos al ser tratados. Nuestro segmento son personas entre los 20 y 40 años ubicados en Lima Moderna y con un estilo de vida sofisticado. El proyecto cuenta con un crecimiento anual promedio proyectado del 27.3% y una demanda anual inicial de aproximadamente 11,000 servicios. El proyecto cuenta con una inversión inicial de S/ 82,427, la cual tendrá un financiamiento del 30%. Y presenta un VPN de S/146,145, TIR de 51.87%, IR de 2.79 y PRI 3.77 años, lo cual confirma su viabilidad financiera, para los 5 años de horizonte de tiempo.
Sneakers have become one of the most important and preferred garments by consumers. This is shown by ADEX, on its Data Trade portal (2020), where an average growth of 35% in imports of this footwear is identified in the last three years. This preference does not translate to simple taste, but goes further by becoming a culture, with more passionate consumers, persecutors of new releases and collectors of limited editions. Therefore, they give time and dedication to provide them with the proper care. Given this need, Lava Tu Taba was born, a solution for specialized cleaning and care of slippers. The proposal combines the careful cleaning of footwear, with a comprehensive delivery system and the use of technologies that will reduce our customers' time, as well as provide them with the necessary security by providing complete monitoring of their products when they are treated. Our segment is people between 20 and 40 years old located in Modern Lima and with a sophisticated lifestyle. The project has a projected average annual growth of 27.3% and an initial annual demand of approximately 11,000 services. The project has an initial investment of S / 82,427, which will have a financing of 30%. And it presents a NPV of S / 146,145, IRR of 51.87%, IR of 2.79 and PRI 3.77 years, which confirms its financial viability, for the 5-year time horizon.
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Viola, Cristina. "Biochemical studies of human TBP-associated factor TAF2 and a TAF2 and a TAF2-8-10 subcomplex of human general transcription factor TFIID". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV072/document.

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Pureza, Vitoria M. M. "Abordagens adaptativas de metaheuristicas tabu". [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261048.

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Orientador: Paulo Morelato França
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-07-22T22:52:02Z (GMT). No. of bitstreams: 1 Pureza_VitoriaM.M_D.pdf: 9869285 bytes, checksum: 3d30f5f94e19c47fb41416cb14190a97 (MD5) Previous issue date: 1996
Resumo: A Busca Tabu é um procedimento heurístico de orientação da busca com vistas à obtenção de boas soluções em problemas de dificil tratamento. Fundamentalmente, ela é caracterizada por mecanismos que promovem a superação da otimalidade local. Esses mecanismos geralmente tomam a forma de parâmetros que impõem restrições à seleção de movimentos. Como a calibragem desses elementos restritivos tem um impacto fundamental no desempenho do algoritmo, algumas implementações utilizam estratégias que provocam alterações sistemáticas nos valores de determinados parâmetros. Estas estratégias procuram intensificar a exploração de regiões promissoras e o abandono de regiões onde possibilidades de melhoria parecem mínimas. As alterações nos valores dos parâmetros são normalmente acionadas por fases de busca caracterizadas pela ausência de movimentos de atualização da solução incumbente. O objetivo principal deste trabalho é o de propor uma nova abordagem adaptativa de metaheurísticas Tabu. A abordagem HTA, aqui considerada, propõe que a alteração de parâmetros seja determinada a partir da identificação de padrões da trajetória de busca recentemente traçada. Estes padrões fornecem indicações, ainda que limitadas, acerca da topologia do espaço de soluções. Para cada padrão, são aplicadas perturbações nos valores de parâmetros tabu selecionados, como forma de adaptar a busca às diferentes condições encontradas. A abordagem HTA foi desenvolvida a partir de extensos experimentos com o Problema do Caixeiro Viajante Simétrico e Euclideano (PCV). Testes envolveram 12 instâncias clássicas e verificaram ganhos significativos em relação à versão não-adaptativa, mesmo sob condições operacionais estressantes impostas por parâmetros mantidos fora de controle. A seguir, a mesma abordagem foi aplicada ao Problema de Roteamento de Veículos (PRV). Neste trabalho, apresentamos os resultados obtidos com 14 instâncias clássicas caracterizadas por diferentes restrições. Os resultados foram comparados com os de três algoritmos altamente competitivos e indicaram que HTA produz soluções de qualidade comparável aos demais. São também apresentados os resultados obtidos com uma implementação adaptativa HTA para o Problema de Agrupamento Capacitado (PAC). Os resultados, mais uma vez, sugerem que a introdução de mecanismos adaptativos baseados em padrões da trajetória da busca é uma estratégia robusta e promissora
Abstract: Tabu Search (TS) is a general heuristic procedure for guiding search to obtain good solutions in complex solution spaces. Fundamentally, it is characterized by mechanisms that allow the exploration of the solution space beyond local optimality. These mechanisms are generally implemented by means of parameters which impose restrictions to move selection. Since the calibration of such restrictive elements has a major impact on the algorithm's performance, some implementations use strategies for altering the values of these parameters whenever non-improving search phases are verified. Essentially, these strategies seek to intensify the exploration of promising regions of the solution space, and to abandon the search in regions where improvement possibilities seem to be minimal. The main purpose ofthis work is to propose a new adaptive Tabu metaheuristic approach. The HTA approach, considered here, assumes that the alteration of the parameters values should be defined first by identifying specific pattems in the search trajectory recently described. These pattems provide indications of the solution space topology. For each pattem, perturbation on the values of selected tabu parameters is applied, as means to adapt the search to the different conditions found. The HTA approach was developed from extensive experiments with the Symmetric and Euclidean Traveling Salesman Problem (TSP). Tests involved 12 benchmark instances and verified improvements with respect to a non-adaptive implementation, even under stressing operational conditions provided by free-Junning parameters. HTA was also applied to the Vehicle Routing Problem (VRP). We present the results obtained for 14 benchmark instances characterized by different restrictions. Our adaptive implementation is compared to three highly competitive algorithms. The results indicate that HTA is able to provide solution quality levels comparable to the other algorithms. We also present the results provided by an HTA implementation for the Capacitated Clustering Problem (CCP). They also suggest that introducing adaptive mechanisms based on the pattems of search trajectories is a robust and promising strategy
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Silva, Juliana Simões e. "Algoritmos baseados em busca tabu e busca tabu reativa para problemas generalizados de programação de projetos". [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260182.

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Orientador: Vinicius Amaral Armentano
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-08-04T02:52:54Z (GMT). No. of bitstreams: 1 Silva_JulianaSimoese_M.pdf: 629718 bytes, checksum: ceb1677c1d500c414d75ed2eb8112ad7 (MD5) Previous issue date: 2004
Resumo: O problema clássico de programação de projetos com restrição de recursos consiste de atividades, sujeitas a relações de precedência, que têm duração fixa e competem por recursos limitados. Este problema envolve a determinação do instante de início das atividades com o objetivo de minimizar o tempo de término do projeto. Diversas extensões do problema clássico têm sido consideradas na literatura para modelar problemas reais. Uma destas extensões é o problema abordado neste trabalho, denominado problema generalizado de programação de projetos com restrição de recursos. O problema generalizado considera duas extensões do problema clássico. A primeira envolve relações de precedência representadas por intervalos mínimos de tempo entre início de duas atividades, que são importantes em ambientes de produção ¿make-to-order¿, quando existe um tempo de preparação de máquina independente da seqüência entre duas atividades. A segunda extensão consiste de disponibilidade de recursos variante no tempo, que incorpora situações em que somente um subconjunto do total da mão-de-obra ou de máquinas está disponível devido a férias ou manutenção. Devido à alta complexidade combinatória do problema, utilizam-se métodos heurísticos para a resolução de problemas de porte real. Algoritmos que combinam conceitos de busca tabu e busca tabu reativa são propostos e implementados computacionalmente. O desempenho destes é comparado com um algoritmo de busca tabu reativa da literatura
Abstract: The classical resource constrained project scheduling problem consists of activities with fixed duration and subject to precedence relations, which compete for limited resources. This problem involves the determination of the starting time of the activities in order to minimize the completion time of the project. Several extensions of the classical problem have been addressed in the literature to model real problems. One of these extensions is the problem tackled in this work, named generalized resource constrained project scheduling problem. The generalized variant considers two extensions in relation to the classical problem. The first one involves the representation of precedence relations among activities, by means of a minimum time interval between two activities, which is important in the make-to-order production setting, when a machine setup time is incurred between the processing of two activities. The second extension considers that the resource availability is time varying, which represents the situation where only a subset of the total manpower and machines is available due to vacation or maintenance. Due to the high combinatorial complexity of this problem, heuristic methods are used to solve real size problems. Algorithms that combine concepts from tabu search and reactive tabu search are proposed and computationally implemented. Their performance is tested against a reactive tabu search algorithm from the literature
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Slomka, Frank. "Mehrkriterienoptimierung verteilter Echtzeitsysteme mit Tabu-Search /". Düssdeldorf : VDI-Verl, 2002. http://www.gbv.de/dms/bs/toc/35430979x.pdf.

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Heathcote, Daniel. "Aerodynamic loads control using mini-tabs". Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760920.

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Aircraft encounter increased aerodynamic loads when exposed to gusts, turbulence andmanoeuvres. Currently, these loads are mitigated through the use of ailerons and spoilers to reduce lift, in turn reducing the loads passed to the aircraft structure. However, these actuators are limited in their frequency response and cannot control loads produced by higher frequency events. Therefore, an actuator which can mitigate high frequency oscillatory loads is required, with a deployment reduced frequency, k of up to 1. One such promising load control actuator is the minitab, consisting of a small span-wise strips, similar to the Gurney flap, deployed normal to the airfoil upper surface. Key to the actuator’s high frequency response is its low inertia, meaning that a small energy input can achieve a significant effect. To investigate the efficacy of the minitab on load alleviation a series of steady state, periodic and transient measurements were conducted at a Reynolds number of 6.6 x 105. These experiments aimed to fully evaluate the effect of chordwise location, mini-tab height and angle of attack on steady state load control. The dynamic response was categorised, in terms of magnitude, phase and time delay by the periodic and transient measurements. Mini-tabs of height h/c = 0.02 and 0.04 were employed in a steady state configurationacross a range of chordwise locations to investigate the effects of mini-tab height and chordwise position. Overall, the mini-tab was found to have a lift reducing effect which increased with height. It was found that the effect of the chordwise location was highly dependent on the angle of attack. Placement close to the trailing edge induced a large effect at α = 0°, creating an effective change in camber comparable to conventional Gurney flap use. Peak suction over the lower surface increased resulting in a reduction of ΔCL = -0.48. Approaching stall, effectiveness decreased as the mini-tab became immersed in the separated flow. Placement at xf/c = 0.60 produced an almost constant lift reduction between α = 0° and 5° of ΔCL ≈ -0.60, with a gradual reduction to stall. A mini-tab positioned close to the leading edge (xf/c = 0.08) was found to separate the flow effectively at low incidences but with no noticeable change in lift observed. It was found that the flow separation produced by the mini-tab effectively eliminated the suction peak on the upper surface. However, placement close to the leading edge has increasing effectiveness towards stall, as the shear layer induced by the separation was displaced further from airfoil surface. Peak lift reduction at stall was found to be ΔCL ≈ -0.67. The optimum chordwise location for peak lift reduction is dependent on the airfoil angle of attack: the position of the mini-tab for maximum lift reduction moves towards the leading edge as the angle of attack increases. The second stage utilised a deployable mini-tab up to reduced frequencies, k = 0.79, placedat xf/c = 0.85, to assess the mini-tab’s frequency response. The force measurements indicate that the mini-tab has a decreasing effect on lift reduction with increasing actuation frequency. This trend is comparable to Theodorsen’s function, based on the change in circulation. For α = 0°, the normalised peak-to-peak lift reduction decreased from 1 for steady state deployment to around 0.6 at k = 0.79. In addition, a phase lag exists between the mini-tab deployment and the aerodynamic response which increased with actuation reduced frequency, k. However, the measured phase lag is substantially larger than Theodorsen’s prediction. Increasing the angle of attack, α reduced the mini-tab’s effect on lift while increasing the phase angle when comparing equal k values. Particle Image Velocimetry measurements indicate that the delay and reduction in effectiveness of periodic deployment is due to the presence and growth of the separated region behind the mini-tab. Overall, the mini-tab was found to be an effective, dynamic lift reduction device with the separated region behind the mini-tab key to the amplitude and phase delay of lift response. Finally, the aerodynamic response of the mini-tab was investigated during a transientdeployment. The delay in aerodynamic response to mini-tab actuation was consistent with literature. The normalised deployment period, τdeploy did not provide a significant alteration in the aerodynamic response for deployment periods below τdeploy = 3, with the aerodynamic response reaching the steady state value around τ = 6-8. The aerodynamic response of the mini-tab was approximated using a simple, 1st order system response to a ramp-step input of gradient 1/τdeploy, indicating that the aerodynamic response of the mini-tab is further delayed for higher angles of attack, due to the presence of separated flow in the vicinity of the mini-tab. PIV measurements were utilised to analyse the effect of transient mini-tab deployment, indicating a delay in the development of the separation region created by the mini-tab, producing a corresponding delay in aerodynamic response. In addition, outward deployment was found to have a slower aerodynamic response than inward deployment, as the flow was found to take to detach slower than to reattach.
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Furtado, João Carlos. "Otimização de leiaute utilizando busca tabu". Instituto Nacional de Pesquisas Espaciais (INPE), 1995. http://urlib.net/sid.inpe.br/iris@1905/2005/07.29.00.20.

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A busca de melhores leiautes é um problema de otimizacao combinatoria que surge em uma grande variedade de contextos de planejamento espacial, como no leiaute de departamentos em uma industria. Como nao existe algoritmo de otimizacao conhecido que obtenha uma solucao otima global em tempo polinomial, usam-se metodos heuristicos. Estudamos o assunto aplicando a seguinte sequencia de passos para um dado problema: 1) Geramos uma solucao inicial atraves do procedimento de aglomeracao; 2) Geramos uma outra solucao inicial, recolocando as facilidades aleatoriamente; 3) Aplicamos a busca tabu as duas solucoes iniciais geradas; 4) Comparamos os resultados obtidos no passo 3. Este procedimento é aplicado a quatro casos: os de 12, 15, 20 e 30 facilidades. No espaco destinado a alocacao das facilidades ja existiam areas ocupadas e que nao podiam ser utilizadas pelas facilidades, o que aumentou consideravelmente a dificuldade de tratamento do problema. Comparando os leiautes iniciais produzidos no passo 1 com os produzidos no passo 2, concluimos que o procedimento de aglomeracao gerou leiautes iniciais de melhor qualidade. No passo 4, percebemos que a busca tabu, quando aplicada a solucao inicial produzida pelo passo 1, gera leiautes finais de qualidade ligeiramente superiores aos obtidos, quando este procedimento é aplicado a solucao inicial produzida pelo passo 2. Concluimos que independentemente da qualidade da solucao inicial, a busca tabu é uma heuristica eficiente no processo de busca.
The search of better layouts is a combinatorial optimisation problem that arises in a wide variety of spacial planning contexts, in looking for a Layout of departments industry. Since no polinomial-time algorithm for attainning a global optimal solution is known some heuristics techniques are used. We study this subject, for a given problem, performing the following steps: 1) We generate an initial solution by using a clustering procedure; 2) We generate another initial solution, rearranging them randomly; 3) We apply the tabu search to the two initial solutions generated above; 4) We compare the results obtained in the step 3. The procedure is applied to four cases, namely, those with 12, 15, 20 and 30 facilities. In the space assigned to facilities there were occupied areas and the facilities cannot be used there, so we increased the difficulty of the problem. When we compared the initial layouts obtained in step 1 with the obtained in step 2, we conclued that step 1 obtained better layouts. From step 4, we conclued that the tabu search obtained sligthly better final layouts when applied to initial solutions generated in step 1 than those obtained starting from solutions generated in step 2. So we conclude that tabu search is an efficient search procedure independent of the quality of the initial solution.
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Libros sobre el tema "TAB2"

1

Trimis-Kyros, S. Assessment of the suitability of selected binders for TaC and TaB2 based on electron-theory considerations. Manchester: UMIST, 1995.

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M, Samimy, Reeder M. F y United States. National Aeronautics and Space Administration., eds. Effect of tabs on the evolution of an axisymmetric jet. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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Hāṇḍā, Omacanda. Tabo Monastery and Buddhism in the trans-Himalaya: Thousand years of existence of the Tabo Chos-khor. New Delhi: Indus Pub. Co., 1994.

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Taba-Taba: Roman. Paris: Éditions du Seuil, 2017.

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Schlatter, Tim. Ba : moe hopoeno hiya : hiya: Tupuilamehole mabu. Port Moresby: Bible Society of Papua New Guinea, 1993.

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Oxana, Chira. Eufemismele în limbajul actual: particularităţi structurale, semantice şi funcţionale. Editado por Botnaru Liliana. Chişinău: Lyceum, 2018.

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Noru tabi yomu tabi. Tōkyō: Kadokawa Shoten, 2004.

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Benthien, Claudia. Tabu: Interkulturalität und Gender. München: W. Fink, 2008.

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Tabu: Interkulturalität und Gender. München: W. Fink, 2008.

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Veresenʹ, Mykola. Tabu. Kyïv: TOV "Dz͡h︡erela M", 2001.

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Capítulos de libros sobre el tema "TAB2"

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Mehdikhani, Behzad, Gholam hossein Borhani, Saeed Reza Bakhshi y Hamid Reza Baharvandi. "Synthesis of Composite TaC-TaB2 Powders". En Advanced Composites for Aerospace, Marine, and Land Applications, 55–64. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48096-1_5.

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Watanabe, Tadahiko, Tsuyoshi Doutsu y Kazuhisa Shobu. "Densification Mechanism Of TiB2-TaB2-CoB Based Ceramics". En Sintering ’87, 1245–50. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1373-8_210.

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Villars, P., K. Cenzual, J. Daams, R. Gladyshevskii, O. Shcherban, V. Dubenskyy, N. Melnichenko-Koblyuk et al. "TaS2". En Landolt-Börnstein - Group III Condensed Matter, 691. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-44752-8_579.

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Campbell, Daniel, Corey Ray-Subramanian, Winifred Schultz-Krohn, Kristen M. Powers, Renee Watling, Christoph U. Correll, Stephanie Bendiske et al. "TABS". En Encyclopedia of Autism Spectrum Disorders, 3063. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_101411.

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Jödicke, Ansgar. "Tabu". En Metzler Lexikon Religion, 428–29. Stuttgart: J.B. Metzler, 2000. http://dx.doi.org/10.1007/978-3-476-03704-6_119.

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Jödicke, Ansgar. "Tabu". En Metzler Lexikon Religion, 1592–93. Stuttgart: J.B. Metzler, 2005. http://dx.doi.org/10.1007/978-3-476-00091-0_511.

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Glover, Fred y Manuel Laguna. "Tabu Search Background". En Tabu Search, 1–24. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6089-0_1.

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Glover, Fred y Manuel Laguna. "Neglected Tabu Search Strategies". En Tabu Search, 343–57. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6089-0_10.

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Glover, Fred y Manuel Laguna. "Tabu Search Foundations: Short Term Memory". En Tabu Search, 25–57. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6089-0_2.

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Glover, Fred y Manuel Laguna. "Tabu Search Foundations: Additional Aspects of Short Term Memory". En Tabu Search, 59–91. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6089-0_3.

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Actas de conferencias sobre el tema "TAB2"

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Goncharov, A. A., A. V. Zykov, I. V. Shelest, A. N. Yunda, S. D. Yakovin, V. N. Kuznetsov, A. D. Mikhalev y V. V. Buranich. "Effect of magnetron sputtering (RF and DC) parameters on the TaB2 films structure". En 2016 International Conference on Nanomaterials: Application & Properties (NAP). IEEE, 2016. http://dx.doi.org/10.1109/nap.2016.7757265.

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Elgazzar, S. "Theoretical de Haas-van Alphen Data and Plasma Frequencies of MgB2 and TaB2". En LECTURES ON THE PHYSICS OF HIGHLY CORRELATED ELECTRON SYSTEMS VI: Sixth Training Course in the Physics of Correlated Electron Systems and High-Tc Superconductors. AIP, 2002. http://dx.doi.org/10.1063/1.1509145.

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Shmakov, V. V., A. S. Buyakov, M. R. Sukhova y S. P. Buyakova. "SELF-HEALING KINETICS OF ZrB2-SiC-TaB2 SYSTEM CERAMICS WITH DOUBLE COMPOSITE STRUCTURE". En Physical Mesomechanics of Materials. Physical Principles of Multi-Layer Structure Forming and Mechanisms of Non-Linear Behavior. Novosibirsk State University, 2022. http://dx.doi.org/10.25205/978-5-4437-1353-3-317.

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Cerantola, D. J. y A. M. Birk. "Study of Tabs in a Short Annular Diffuser With a Strong Swirling Flow". En ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25567.

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Passive augmentation devices are typically added to diffusers to increase pressure recovery; however, applications such as infrared suppression exist where more uniform outlet velocity profiles are also desirable. Square tabs were added to a short annular diffuser system with diffuser effectiveness of 80% in strong swirling subsonic turbulent flow. The number, axial position, width, and height were varied for the tabs with a 135° orientation angle. Results showed that back pressure increased linearly with increasing tab projected area blockage but outlet velocity uniformity was maximum with 7% tab blockage. Tabs placed on the centre body base recovered more dynamic pressure than tabs placed downstream on the centre body with similar tab area blockage.
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Holst, D., A. B. Bach, C. N. Nayeri y C. O. Paschereit. "Influence of a Finite Width Micro-Tab on the Spanwise Lift Distribution". En ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94381.

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The results of surface pressure measurements are presented in this paper to gain further insight into the lift changing influence of finite width micro-tabs, especially in adjacent airfoil sections. Micro-tabs are a promising concept for load control on wind turbines. Local pressure distributions were measured in several rows of pressure taps in the vicinity of the finite width micro-tab attached to a FX 63-137 profile at low Reynolds numbers. The investigation focuses on length dependency, chordwise position, and interaction between two micro-tabs. Additionally, stereo Particle-Image-Velocimetry measurements were conducted to study the structure, sense of rotation, and influence of tab-induced tip vortices, as well as the impact of a finite width micro-tab on the model’s near wake. Experiments reveal relative changes of more than 30 % in the pressure coefficient distribution upstream of several micro-tab configurations. Furthermore, increments of 20 % are recorded in neighbouring sections not directly controlled by micro-tabs. Even higher changes are obtained in the region between two tabs. These improvements are attained due to local and global changes in the effective camber.
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Ekkad, Srinath V., Hasan Nasir y Sumanta Acharya. "Film Cooling on a Flat Surface With a Single Row of Cylindrical Angled Holes: Effect of Discrete Tabs". En ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1455.

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Abstract The effect of discrete delta-shaped tabs on the film cooling performance from a row of cylindrical holes is investigated. The holes are inclined at 35° along the streamwise direction. Three tab locations are investigated: (1) tabs placed along the upstream edge of the hole; (b) tab placed along the downstream edge of the hole; and (3) tabs placed along the lateral edges of the hole. Measurements were carried out in a low-speed wind tunnel using the transient liquid crystal technique. The mainstream velocity and free-stream turbulence intensity in the low speed wind tunnel are 8.5 m/s and 6% respectively and the Reynolds number based on hole diameter is 6375. Three blowing ratios of 0.56, 1.13, and 1.7 are tested. Results show that the tab placed upstream of the hole covering the 33% of the hole exit provides the highest film effectiveness compared to other tab locations studied. This is because the jet lift-off in the presence of the tabs is reduced and there is greater lateral spreading of the jet.
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McBean, S. F. y A. M. Birk. "The Performance of Air-Air Ejectors With Triangular Tabbed Driving Nozzles". En ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90588.

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This paper describes an experimental investigation into the effects of geometrical variations on ejector system performance when the driving nozzle includes delta mixing tabs. Mixing tabs have been shown to provide good mixing performance with comparable back-pressure penalties to other types of enhanced mixing nozzles. The performance parameters of most interest are pumping, mixing, and back-pressure. Geometric parameters studied include standoff distance, mixing-tube diameter, and tab angle. Experimental testing showed significant performance improvements in mixing and pumping with a decrease in tab angle. Maximum mixing was found to occur with tab angles positioned at 120°. Exceptional mixing was also observed with increased standoff. Back-pressure was shown to increase with increasing standoff and decreasing tab angle, but was not affected by mixing-tube diameter. In addition, a zone of recirculation was identified at the entrance to the mixing-tube. This zone is thought to have an influence on ejector performance.
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van Dam, C. P., C. Bauer y D. T. Yen Nakafuji. "Lift Control Using MEMS-Based Moving Trailing-Edge Tabs". En ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33990.

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Micro-electro-mechanical (MEM) translational tabs are introduced for active lift control on aircraft. These tabs are mounted near the trailing edge of lifting surfaces such as aircraft wings and tails, deploy approximately normal to the surface, and have a maximum deployment height on the order of one percent of the section chord. Deployment of the tab effectively changes the sectional camber, thereby changing the aerodynamic characteristics of a lifting surface. Tabs with said deployment height generate a change in the section lift coefficient of approximately ±0.3. The microtab design and the techniques used to fabricate and test the tabs are presented.
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UPADHYAY, SHAILEE, FRANCISCO MESQUITA, BABAK FAZLALI, LARISSA GORBATIKH y YENTL SWOLFS. "OPTIMIZATION OF TAB GEOMETRY TO MINIMIZE LONGITUDINAL STRESS CONCENTRATION DURING TENSILE TESTING OF UNIDIRECTIONAL CFRP". En Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35923.

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A uniaxial tensile test is a useful method for determination of material properties, especially longitudinal tensile strength. To accurately derive the longitudinal tensile strength, it is desired that the specimen fails in in the gauge section defined here as ‘working zone’. Unidirectional (UD) composites require use of end tabs during this tensile testing to avoid damage to the specimen due to grip serrations. The grip pressure, along with sudden geometry change at the edge of end tabs leads to longitudinal stress concentrations. The conventionally used rectangular and tapered end tabs suffer from these longitudinal stress concentrations under the edge of end tabs, causing premature failure of specimen outside of the working zone. In the present paper, a simulation study is performed for comparison of conventional end tabs with hybrid specimen geometry [1] and a novel arrow-shaped end tab geometry to determine the effect of end tab geometry on longitudinal stress concentrations. The study is focused on high modulus carbon fibre HS40/epoxy UD (0°) composite. The numerical model replicates the actual set-up for uniaxial tensile testing, including contact interactions between testing machine components. The simulation results are used to further optimise the geometry and provide recommendations to eliminate or minimise longitudinal stress concentrations.
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Bach, A. B., D. Holst, C. N. Nayeri y C. O. Paschereit. "Transitional Effects of Active Micro-Tabs for Wind Turbine Load Control". En ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94369.

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Wind turbines generally suffer from unsteady inflow caused by yaw misalignment, gusts, and turbulence which induce fatigue loads. Spanwise distributed active micro-tabs at the mid and outer blade regions are able to countervail these unsteady loads. However, during the actuation process of these devices, transient effects play an important role. This work aims to give a deeper insight in the process of the tab deployment and retraction to evaluate the effectiveness of active micro-tabs for load control on wind turbines. Wind tunnel experiments on a two-dimensional NACA 0018 airfoil with an active micro-tab were conducted. The tab deployment- and retraction time was varied for an application on the suction or the pressure side of the airfoil. Time resolved surface pressure measurements were performed at Reynolds numbers of Re = 7 · 105 and 1 · 106. Transient responses showed a significant delay and post deployment behavior of the lift which strongly depend on the actuation time.
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Informes sobre el tema "TAB2"

1

Ariza Molina, Flor Manuela, Fredys Padilla González y Alexander Salazar Montoya. Evaluación económica de la rentabilidad de cafés especiales de la variedad Tabí en el municipio de Manaure - Cesar. Universidad Nacional Abierta y a Distancia, abril de 2022. http://dx.doi.org/10.22490/ecacen.4264.

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La investigación propuesta busca evaluar la rentabilidad de la producción económica por medio del análisis costo beneficio de cafés especiales de la variedad Tabí bajo un sistema agroforestal en la serranía del Perijá en el municipio de Manaure – Cesar, teniendo en cuenta que uno de los factores que más afecta a este sector es conocer la rentabilidad de cada producción, debido a que los caficultores no manejan, no tienen control y seguimiento de la actividad productiva, por ende, no tienen conocimiento de cómo controlar y reducir los costos que se generan en la producción del café. Un estudio es de enfoque cuantitativo descriptivo. Se trabajará con 58 productores de cafés especiales de la variedad Tabí bajo un sistema agroforestal en la serranía del Perijá en el Cesar, a los cuales se les aplicará una encuesta diseñada por los investigadores para identificar todos los aspectos que puedan ser considerados costos y beneficios en la producción. Como resultado se espera determinar la rentabilidad de la producción de cafés especiales de la variedad Tabí por medio de la evaluación económica (Análisis costo beneficio).
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O'Rourke, Kevin P., T. G. Bailey, Raymond Hill y William B. Carlton. Dynamic Routing of Unmanned Aerial Vehicles Using Reactive Tabu Search. Fort Belvoir, VA: Defense Technical Information Center, noviembre de 1999. http://dx.doi.org/10.21236/ada380543.

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Andrews, Malcolm y Dean Preston. TAB Models for Liquid Sheet and Ligament Breakup. Office of Scientific and Technical Information (OSTI), septiembre de 2014. http://dx.doi.org/10.2172/1154967.

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Condon, John A. y Michael S. Hollis. Dynamic Analyses of the Mortar Dragster Tab Mechanism. Fort Belvoir, VA: Defense Technical Information Center, abril de 1998. http://dx.doi.org/10.21236/ada345815.

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Inman, Daniel J. Shape Memory Actuators for Tab-Assisted Control Surfaces. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2000. http://dx.doi.org/10.21236/ada377471.

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Çavuşlar, Gizem, Bülent Çatay y Serkan Mehmet Apaydın. A tabu search approach for the NMR protein structure-based assignment problem. Sabancı University, diciembre de 2011. http://dx.doi.org/10.5900/su_fens_wp.2011.18983.

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Probst, Mark R. Endurance Testing of Redesigned Tab Spring for MI-RAMS System. Fort Belvoir, VA: Defense Technical Information Center, abril de 2010. http://dx.doi.org/10.21236/ada518449.

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Barnes, J. W. Using Advanced Tabu Search Approaches to Perform Enhanced Air Mobility Command Operational Airlift Analyses. Fort Belvoir, VA: Defense Technical Information Center, febrero de 2009. http://dx.doi.org/10.21236/ada585803.

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Chang, Heui-Yung, Chu-Tsen Liao, Ching-Yu Yeh y Chi-Ming Lai. SEISMIC UPGRADING OF STEEL MOMENT CONNECTIONS USING DOUBLE-SHEAR-TAB DETAILS. The Hong Kong Institute of Steel Construction, diciembre de 2018. http://dx.doi.org/10.18057/icass2018.p.142.

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Ramos Fernández, Fernando. El “tabú” periodístico de la monarquía en España. La crisis real y la crisis coyuntural. Revista Latina de Comunicación Social, marzo de 2013. http://dx.doi.org/10.4185/rlcs-2013-975.

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