Gotowe bibliografie tematyczne / Rib area

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Gotowa bibliografia na temat „Rib area”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Rib area"

Taslim, M. E., and V. Nezym. "A New Statistical-Based Correlation for the Rib Fin Effects on the Overall Heat Transfer Coefficient in a Rib-Roughened Cooling Channel." International Journal of Rotating Machinery 2007 (2007): 1–11. http://dx.doi.org/10.1155/2007/68684.

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Heat transfer coefficients in the cooling cavities of turbine airfoils are greatly enhanced by the presence of discrete ribs on the cavity walls. These ribs introduce two heat transfer enhancing features: a significant increase in heat transfer coefficient by promoting turbulence and mixing, and an increase in heat transfer area. Considerable amount of data are reported in open literature for the heat transfer coefficients both on the rib surface and on the floor area between the ribs. Many airfoil cooling design software tools, however, require an overall average heat transfer coefficient on

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Ahn, Seung-Yong, and Kwang-Yong Kim. "Thermal Performance of T-shaped Obstacles in a Solar Air Heater." Processes 8, no. 10 (2020): 1305. http://dx.doi.org/10.3390/pr8101305.

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This paper proposes T-shaped ribs as obstacles attached to the heat absorber plate in a rectangular solar air heater to promote heat transfer. The thermal and aerodynamic performance of the solar heater was numerically evaluated using three-dimensional Reynolds-averaged Navier–Stokes equations with the shear stress transport turbulence model. A parameter study was performed using the ratios of rib height to channel height, rib width to channel width, and rib width to rib height. The area-averaged Nusselt number and friction factor were selected as the performance parameters of the solar air he

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Hwang, Jenn-Jiang, and Tong-Miin Liou. "Augmented Heat Transfer in a Rectangular Channel With Permeable Ribs Mounted on the Wall." Journal of Heat Transfer 116, no. 4 (1994): 912–20. http://dx.doi.org/10.1115/1.2911466.

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Turbulent heat transfer and friction in a rectangular channel with perforated ribs arranged on one of the principal walls are investigated experimentally. The effects of rib open-area ratio, rib pitch-to-height ratio, rib height-to-channel hydraulic diameter ratio, and flow Reynolds number are examined. To facilitate comparison, measurements for conventional solid-type ribs are also conducted. Laser holographic interferometry is employed to determine the rib permeability and measure the heat transfer coefficients of the ribbed wall. Results show that ribs with appropriately high open-area rati

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Boynton, B. R., G. M. Barnas, J. T. Dadmun, and J. J. Fredberg. "Mechanical coupling of the rib cage, abdomen, and diaphragm through their area of apposition." Journal of Applied Physiology 70, no. 3 (1991): 1235–44. http://dx.doi.org/10.1152/jappl.1991.70.3.1235.

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Although volumetric displacements of the chest wall are often analyzed in terms of two independent parallel pathways (rib cage and abdomen), Loring and Mead have argued that these pathways are not mechanically independent (J. Appl. Physiol. 53: 756-760, 1982). Because of its apposition with the diaphragm, the rib cage is exposed to two distinct pressure differences, one of which depends on abdominal pressure. Using the analysis of Loring and Mead as a point of departure, we developed a complementary analysis in which mechanical coupling of the rib cage, abdomen, and diaphragm is modeled by a l

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Agostoni, E., L. Zocchi, and P. T. Macklem. "Transdiaphragmatic pressure and rib motion in area of apposition during paralysis." Journal of Applied Physiology 65, no. 3 (1988): 1296–300. http://dx.doi.org/10.1152/jappl.1988.65.3.1296.

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Changes in pleural surface pressure in area of apposition of diaphragm to rib cage (delta Ppl,ap), changes in abdominal pressure (delta Pab), and redial displacement of the 11th rib have been recorded in anesthetized, paralyzed dogs during lung inflation or deflation. Above functional residual capacity (FRC) changes in transdiaphragmatic pressure in area of apposition (delta Pdi,ap) were essentially nil in intact (INT) dogs either in lateral or supine posture, and in partially eviscerated (EVS) dogs in lateral posture, either in the 10th or 11th intercostal space. Below FRC delta Pdi,ap could

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Chaudhary, Zakir Ilahi, Ambareen Khan, Sher Afghan Khan, Mohammad Nishat Akhtar, and Khizar Ahmed Pathan. "Control of Suddenly Expanded Flow Using Quarter Rib for Area Ratio 4.84 at Mach 2." Journal of Advanced Research in Experimental Fluid Mechanics and Heat Transfer 19, no. 1 (2025): 1–29. https://doi.org/10.37934/arfmts.19.1.129.

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Occurrence of sudden expansion is widespread in the defense and automobile industry. At the blunt base of the fuselage, missiles, projectiles, and aircraft bombs, the flow gets separated at the base and forms low-pressure recirculation, leading to a significant increase in the base drag. This paper addresses how this low base pressure at the base can be controlled. A detailed numerical study was conducted to assess the impact of the quarter circle as a passive control mechanism in a suddenly expanded flow for an area ratio of 4.84 at Mach M = 2.0 for various rib radii ranging from 1 mm to 4 mm

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Liou, Tong-Miin, Chih-Wen Kao, and Shih-Hui Chen. "Flowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular Duct." Journal of Fluids Engineering 120, no. 3 (1998): 504–12. http://dx.doi.org/10.1115/1.2820691.

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The spatially periodic turbulent fluid flows and friction in a rectangular passage of width-to-height ratio of 4:1 with perforated rectangular ribs mounted on one wall have been studied using laser Doppler velocimetry and pressure probing. The parameters fixed were rib height to duct hydraulic diameter ratio of 0.106, rib width-to-height ratio of 0.76, rib pitch-to-height ratio of 10, and Reynolds number of 2 × 104, while the main parameter investigated was the rib open-area ratio (β) with values of 0%, 10%, 22%, 38%, and 44%. Two critical ranges of β and three characteristic flow regimes were

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Dockstader, D. R. "Joints in the Rib Mountain Area, Wausau, Wisconsin." Geoscience Wisconsin 10 (1986): 78–84. https://doi.org/10.54915/ewvq6402.

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Hsieh, Shou-Shing, and Mao-Yu Wen. "An Experimental Study of Flow Boiling Heat Transfer in Rib-Roughened Tube Annuli." Journal of Heat Transfer 117, no. 1 (1995): 185–94. http://dx.doi.org/10.1115/1.2822302.

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Heat transfer measurements were performed on six rib-type roughened tube annuli (4.67–9.01 mm Dh, 6–16 ribs, rib pitch 19.7–63.0 mm, rib height 4 ram, rib width 15 mm, rib angle 20–60 deg) with two phases of refrigerant R-114 under evaporating conditions. Based on the same heat transfer area of the test section, the effects of heat flux, quality, and rib spacing on flow boiling heat transfer coefficient were presented and discussed. Correlations of two-phase enhancement factor F and suppression factor S were developed by modifications and extensions of Chen’s model for the present geometric co

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Hwang, Jenn-Jiang, and Tong-Miin Liou. "Effect of Permeable Ribs on Heat Transfer and Friction in a Rectangular Channel." Journal of Turbomachinery 117, no. 2 (1995): 265–71. http://dx.doi.org/10.1115/1.2835655.

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Heat transfer and friction characteristics in a rectangular channel with perforated ribs arranged in-line on two opposite walls are investigated experimentally. Five perforated rib open-area ratios (0, 10, 22, 38, and 44 percent) and three rib pitch-to-height ratios (10, 15, and 20) are examined. The Reynolds number ranges from 5000 to 50,000. The rib height-to-channel hydraulic diameter ratio and the channel aspect ratio are 0.081 and 4, respectively. Laser holographic interferometry is employed not only to measure the heat transfer coefficients of the ribbed wall but also to determine the ri

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Rozprawy doktorskie na temat "Rib area"

Moreno, Greicy Mitzi Bezerra [UNESP]. "Desempenho e características quantitativas in vivo e da carcaça de cordeiros recebendo dietas contendo silagem de milho ou cana-de-açúcar em dois níveis de concentrado." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/99600.

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Made available in DSpace on 2014-06-11T19:30:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-02-22Bitstream added on 2014-06-13T19:46:59Z : No. of bitstreams: 1 moreno_gmb_me_jabo.pdf: 352503 bytes, checksum: 6ae1341109d20344528d13b1062a3175 (MD5) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Utilizou-se 32 cordeiros Ile de France, não castrados, alimentados com dietas contendo silagem de milho ou cana-de-açúcar em duas relações volumoso:concentrado, 60:40 ou 40:60. Os animais permaneceram

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Zuin, Roberta Godoy [UNESP]. "Análise genética de características de crescimento e de carcaça em bovinos Nelore." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/92602.

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Made available in DSpace on 2014-06-11T19:26:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-09-03Bitstream added on 2014-06-13T19:12:57Z : No. of bitstreams: 1 zuin_rg_me_jabo.pdf: 216391 bytes, checksum: a0e1c4fd33e27c06f5e9cb650e3c402f (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Características de carcaça preditas por ultrassonografia foram incluídas nos programas de avaliação genética, uma vez que estas estão associadas à qualidade e rendimento de carcaça. Neste trabalho, os objetivos foram estimar os parâmetros genéticos e as tendências gené

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Lopez, Gonzalez Fredy Andrey. "Efeito da suplementação sobre o crescimento e desenvolvimento de fêmeas Brangus." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/129460.

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O objetivo deste estudo foi avaliar a resposta de crescimento e desenvolvimento tecidual de gordura e músculo, através de medidas seriadas obtidas por ultrassom em fêmeas Brangus após desmama, até os 16 meses de idade em diferentes manejos alimentares. O trabalho envolveu 43 fêmeas da raça Brangus. No início do estudo os animais apresentavam uma média de peso vivo (PV) ajustado aos 205 dias de idade de 172.9 ± 18.45 kg e foram distribuídos aleatoriamente em quatro tratamentos de manejo alimentar (MA). O tratamento 1 (T1, n = 9) com média de PV e erro padrão de 160.1 ± 2.5 kg, respectivamente.

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Meirelles, Sarah Laguna. "Características de carcaça de bovinos da raça Canchim : estimativas de parâmetros genéticos e associação com marcadores moleculares /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/104947.

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Resumo: A espessura de gordura subcutânea (EGS) e a área de olho de lombo (AOL) são características importantes ligadas à eficiência de produção e à qualidade da carne bovina. Para considerá-las em um programa de avaliação genética e/ou de seleção assistida por marcadores, é necessário quantificar sua variação genética aditiva e validar marcadores moleculares associados a elas. Desta forma, o objetivo neste trabalho foi contribuir para o melhoramento genético da raça Canchim por meio do estudo das características de carcaça EGS e AOL e de peso, obtidas em média aos 18 meses de idade, com abord

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Zuin, Roberta Godoy. "Análise genética de características de crescimento e de carcaça em bovinos Nelore /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/92602.

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Resumo: Características de carcaça preditas por ultrassonografia foram incluídas nos programas de avaliação genética, uma vez que estas estão associadas à qualidade e rendimento de carcaça. Neste trabalho, os objetivos foram estimar os parâmetros genéticos e as tendências genéticas para área de olho de lombo (AOL), espessura de gordura subcutânea (EG) e espessura de gordura subcutânea de garupa (EGP8), peso corporal aos 210 (P210) e aos 365 (P365) dias de idade em bovinos da raça Nelore. Foram analisados dados de animais nascidos entre 1998 e 2008, oriundos de fazendas participantes do Program

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Matarim, Danielle Leal. "Estimativa de parâmetros genéticos para características de carcaça avaliadas por ultrassom, com ênfase na gordura intramuscular, em bovinos Nelore." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-05102015-115452/.

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Este trabalho foi desenvolvido visando a estimativa de parâmetros genéticos para características de carcaça obtidas por ultrassonografia em bovinos da raça Nelore. Foram analisadas as informações de 13.256 animais, machos e fêmeas, com idade entre 10 e 25 meses, provenientes de cinco propriedades distintas, pertencentes ao programa de melhoramento genético da Associação Nacional de Criadores e Produtores (ANCP). As características de carcaça avaliadas por ultrassonografia foram área de olho de lombo (AOL), espessura de gordura subcutânea (EGS), espessura de gordura na garupa (EGG), percentagem

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LANDIM, Aline Vieira. "EFEITO DO GRUPO GENÉTICO E PESO DE ABATE NAS CARACTERÍSTICAS DA CARCAÇA E QUALIDADE DA CARNE DE CORDEIROS CONFINADOS." Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tde/1127.

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Made available in DSpace on 2014-07-29T15:13:43Z (GMT). No. of bitstreams: 1 alineteseca.pdf: 944325 bytes, checksum: 5f0b947649cbf727f1cd020b11cdb011 (MD5) Previous issue date: 2008-12-15 Sheep rearing is becoming an important economic activity, where it is necessary to establish the ideal slaughter weight per genetic group and sex to acheive standardized carcasses which meet customer needs in terms of product quality.This experiment evaluated the effect of genetic group and slaughter weight on carcass traits and meat quality in lambs. Twenty four Santa Ines (SI), 24 ½ Ile de France x ½

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Meirelles, Sarah Laguna [UNESP]. "Características de carcaça de bovinos da raça Canchim: estimativas de parâmetros genéticos e associação com marcadores moleculares." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/104947.

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Made available in DSpace on 2014-06-11T19:33:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-12-14Bitstream added on 2014-06-13T20:45:16Z : No. of bitstreams: 1 meirelles_sl_dr_jabo_prot.pdf: 325686 bytes, checksum: 5b1303e4e98a3092a0fa9f1e186529b9 (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) A espessura de gordura subcutânea (EGS) e a área de olho de lombo (AOL) são características importantes ligadas à eficiência de produção e à qualidade da carne bovina. Para considerá-las em um programa

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Montagner, Flávia Regina Girardi. "Ecologia de mosquitos (DIPTERA: CULICIDAE) em criadouros artificiais em oito áreas verdes do Município de Porto Alegre, Rio Grande do Sul, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/117915.

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Áreas verdes urbanas são ambientes que podem oferecem oportunidade de interação entre reservatórios e vetores dos meios urbano e silvestre, potencializando o risco de transmissão de doenças e de mudanças em seu perfil epidemiológico. Entender como as alterações da paisagem interferem na composição da fauna de culicídeos e conhecer quais espécies de vetores ocorrem nessas áreas, pode auxiliar na predição da distribuição espacial das espécies frente à urbanização, fornecendo importantes ferramentas para o controle de endemias e planejamento urbano. O objetivo desse estudo foi verificar a ocorrên

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Pessoa, Luciano Montenegro da Cunha. "Geoide gravimetrico local em area da Bacia do Parana." reponame:Repositório Institucional da UFPR, 1997. http://hdl.handle.net/1884/49683.

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Orientador: François Albert Rosier Dissertação (mestrado) - Universidade Federal do Paraná Resumo: O presente trabalho apresenta um modelo geoidal de âmbito local para a região definida geograficamente pelos paralelos - 24° 30' e - 26° 30' e meridianos - 50° 30' e - 52° 30' inserida na bacia sedimentar do Paraná, resultante da combinação de dados gravimétricos com o modelo do geopotencial OSU91A e de um modelo topográfico de alta resolução. A formulação matemática utilizada para a obtenção das ondulações geoidais foi a integral de Stokes, através da técnica remove-restore com modificação

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Książki na temat "Rib area"

Aikman, David. Pacific Rim: Area of change, area of opportunity. Little, Brown, 1986.

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Aikman, David. Pacific Rim: Area of change, area of opportunity. Little, Brown, 1986.

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Anthony, Chapman. Canada and the Pacific Rim. Library of Parliament, Research Branch, 1991.

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Traian, Moga Thomas, ed. Patent practice & policy in the Pacific Rim. Oceana, 1995.

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Ignatavičius, Izidorius. Riba, arba Vytautas: Vaizdų apysaka. Enciklopedijų leidykla, 1991.

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Besher, Alexander. The Pacific Rim almanac. Edited by Wilcock John. HarperPerennial, 1991.

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Seagrave, Sterling. Lords of the rim. Bantam, 1995.

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Arif, Dirlik, ed. What is in a rim?: Critical perspectives on the Pacific Region idea. 2nd ed. Rowman and Littlefield, 1998.

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Arif, Dirlik, and Duke University. Asian/Pacific Studies Institute., eds. What is in a rim?: Critical perspectives on the Pacific Region idea. Westview Press, 1993.

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Lionel, Frost, and White Colin, eds. Coming full circle: An economic history of the Pacific Rim. Westview Press, 1993.

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Części książek na temat "Rib area"

Yan, Bing, Yaoyu Zhu, Cheng Meng, and Zhiyuan Yuanzhou. "Study on Fatigue Performance of Typical Fatigue Detail in Orthotropic Steel Deck." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2532-2_2.

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AbstractOrthotropic steel decks (OSDs) are easily subjected to fatigue cracking under the cyclic vehicle loading, and arc notch between diaphragm and U-rib is one of the typical fatigue details. The strain values of three measuring points at arc notch in a steel bridge were monitoring to obtain the stress time histories. Then, fatigue stress amplitudes and fatigue damage degrees were analysed. It was found that this typical fatigue detail was under tension–compression cyclic stress. The maximum stress amplitude appeared at U-rib weld toe, which indicated that fatigue cracks were more prone to

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Stoddard, Mark A., Ronald Pelot, Floris Goerlandt, and Laurent Etienne. "Making Sense of Marine-Based Search and Rescue Response Time Using Network Analysis." In Area-Based Management of Shipping. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-60053-1_12.

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AbstractNavigation in polar waters follows standard navigational practice, with special consideration for the presence of sea ice and its expected impact on safe ship operation. Experienced polar ship operators rely on timely access to authoritative sea ice analysis and knowledge of the safe operational limits of their ship to determine the navigability of polar waters. Several sea ice risk assessment frameworks exist to assist ship operators with onboard decision-making, most notably, the Polar Operational Limit Assessment Risk Indexing System (POLARIS). The result from POLARIS is referred to

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Bignami, Giovanni F. "15 Stories To Get Rid Of." In We are the Martians. Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2466-3_10.

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Arai, Nobuyuki. "Diversification of Meanings of the Disaster-Stricken Area of Arahama." In Community Responses to Disasters in the Pacific Rim. Routledge, 2023. http://dx.doi.org/10.4324/9781003206415-15.

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Airaksinenni, P. Juhani, P. A. Juvala, A. Tuulonen, H. I. Alanko, R. Valkonen, and A. Tuohino. "Visual field and neuroretinal rim area changes with time." In Seventh International Visual Field Symposium, Amsterdam, September 1986. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3325-5_37.

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Maanpää, Jyri, Julius Pesonen, Heikki Hyyti, et al. "Dense Road Surface Grip Map Prediction from Multimodal Image Data." In Lecture Notes in Computer Science. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-78447-7_26.

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AbstractSlippery road weather conditions are prevalent in many regions and cause a regular risk for traffic. Still, there has been less research on how autonomous vehicles could detect slippery driving conditions on the road to drive safely. In this work, we propose a method to predict a dense grip map from the area in front of the car, based on postprocessed multimodal sensor data. We trained a convolutional neural network to predict pixelwise grip values from fused RGB camera, thermal camera, and LiDAR reflectance images, based on weakly supervised ground truth from an optical road weather s

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Guzmán Wolfhard, Lorena Valeria, and Claudia Raedig. "Connectivity Conservation Management: Linking Private Protected Areas." In Strategies and Tools for a Sustainable Rural Rio de Janeiro. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89644-1_11.

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Onishi, Katsuhiko, Yuichiro Tanaka, Kiminori Mizushino, Katsunori Tachibana, Kaoru Watanabe, and Hiroshi Noborio. "Calibration Experiences of Multiple RGB/Depth Visions for Capturing a Surgical Area." In Lecture Notes in Computer Science. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91244-8_6.

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Zhang, Qing, Chen Xin, Chunyu Guo, Ye Zhang, and Ningli Wang. "Intraocular Pressure-Related Factors, Retinal Vessel Diameter, and Optic Disc Rim Area." In Intraocular and Intracranial Pressure Gradient in Glaucoma. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2137-5_34.

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Battisti, Alessandra, and Federica Tortora. "Application of Upgrading Strategies and Urban Farming Principles to Mangueira Complex, Rio de Janeiro, Brazil." In Dynamics and Resilience of Informal Areas. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29948-8_3.

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Streszczenia konferencji na temat "Rib area"

Tang, Fujian, Lizhi Zhao, Hong-Nan Li, et al. "Spatial Variation Analysis of Localized Corrosion of Steel Bar with Spectral Analysis Technique." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17792.

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Abstract This study aims to statistically analyze the distribution characteristics of localized corrosion along the length of corroded steel bars with spectral analysis techniques. Steel bars were embedded in a concrete prism and subjected to accelerated corrosion to levels ranging from 5.0 wt.% to 30.0 wt.% mass loss. After the corrosion test, the corroded steel bars were taken out of the concrete and cleaned with a sand blaster, and then scanned with a 3D laser scanner. The scanned point clouds were processed with an image processing software to determine the residual cross-sectional area di

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Hwang, Jenn-Jiang. "Measurements of Heat Transfer and Pressure Drop in a Rectangular Channel With Repeated Perforated Ribs of Various Widths." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-476.

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This paper presents experimental results of turbulent heat transfer and friction loss in a rectangular channel with perforated ribs of different widths. Repeated perforated ribs with a height-to-channel hydraulic diameter ratio of h/De = 0.081 are arranged on the two opposite walls of the channel with an in-line fashion. Five rib width-to-height ratios (w/h = 0.16, 0.35, 0.5, 0.7, and 1.0) are examined. The rib open-area ratio (β) and Reynolds number (Re) vary from 0 to 0.44, and 8,000 to 55,000, respectively. Previous results of the solid ribs of square shape are also included for comparison.

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Hwang, Jenn-Jiang, and Tong-Miin Liou. "Effect of Permeable Ribs on Heat Transfer and Friction in a Rectangular Channel." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-301.

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Heat transfer and friction characteristics in a rectangular channel with perforated ribs arranged in–line on two opposite walls are investigated experimentally. Five perforated rib open–area–ratios (0, 10%, 22%, 38%, and 44%) and three rib pitch–to–height ratios (10, 15, and 20) are examined. The Reynolds number ranges from 5000 to 50000. The rib height–to–channel hydraulic diameter ratio and the channel aspect ratio are 0.081 and 4, respectively. Laser holographic interferometry is employed not only to measure the heat transfer coefficients of the ribbed wall but also to determine the rib app

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Korotky, G. J., and M. E. Taslim. "Rib Heat Transfer Coefficient Measurements in a Rib-Roughened Square Passage." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-356.

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Three staggered 90° rib geometries corresponding to blockage ratios of 0.133, 0.167 and 0.25 were tested for pitch-to-height ratios of 5, 8.5 and 10, and for two distinct thermal boundary conditions of heated and unheated channel walls. Comparisons were made between the surface averaged heat transfer coefficients and friction factors for ribs with rounded corners and those with sharp comers, reported previously. Heat transfer coefficients of the furthest upstream rib and that of a typical rib located in the middle of the rib-roughened region of the passage wall were also compared. It was concl

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Hagari, Tomoko, Katsuhiko Ishida, Kenichiro Takeishi, Masaharu Komiyama, and Yutaka Oda. "Experimental Study on Local Heat Transfer in a Rotating, Two-Pass Cooling Channel With Dense Array of Turbulence Promoters With Naphthalene Sublimation Method." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25369.

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Detailed heat transfer coefficient distributions in a rotating, two-pass, square channel with densely arranged rib turbulators on the leading and trailing walls are investigated. Rib turbulators have been used in a cooling channel of turbine airfoils. The dense arrangement of the ribs is one of the potential candidates to improve heat transfer performance because of its surface area enlargement effect. The ribs are arranged with a rib height to channel hydraulic diameter ratio (e/Dh) of 0.13, angles of attack to the mainstream of 60 and 90deg, and rib pitch-to-height ratios (P/e) of 3, 6 and 1

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Ye, Lin, Cun-liang Liu, Hai-yong Liu, Qi-jiao He, and Gang Xie. "Numerical Study on the Effects of V-Shaped Rib Angle on Film Cooling Performance for Turbine Blade Trailing Edge." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75114.

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The trailing edge of the high-pressure turbine blade presents significant challenges to cooling structure design. To achieve better cooling performance at turbine blade trailing edge, a novel ribbed cutback structure is proposed for trailing edge cooling, which has rib structures on the cutback surface for heat transfer enhancement. In this study, numerical simulations have been performed on the effects of V-shaped rib angle on the film cooling characteristics and flow physics. Three V-shaped rib angles of 30°, 45° and 60° are studied. The distributions of adiabatic cooling effectiveness and h

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Taslim, M. E., and C. M. Wadsworth. "Am Experimental Investigation of the Rib Surface-Averaged Heat Transfer Coefficient in a Rib-Roughened Square Passage." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-162.

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Turbine blade cooling, a common practice in modern aircraft engines, is accomplished, among other methods, by passing the cooling air through an often serpentine passage in the core of the blade. Furthermore, to enhance the heat transfer coefficient, these passages are roughened with rib-shaped turbulence promoters (turbulators). Considerable data are available on the heat transfer coefficient on the passage surface between the ribs. However, the heat transfer coefficients on the surface of the ribs themselves have not been investigated to the same extent. In small aircraft engines with small

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Wang, Lei, Mirko Salewski, and Bengt Sunde´n. "PIV Measurements of Turbulent Flow in a Channel With Solid or Perforated Ribs." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30015.

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Particle image velocimetry measurements are performed in a channel with periodic ribs on one wall. We investigate the flow around two different rib configurations: solid and perforated ribs with a slit. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. For the perforated ribs, the slit height is 20% of the rib height, and the open-area ratio is 16%. We discuss the flow in terms of mean velocity, streamlines, vorticity, turbulence intensity, and Reynolds shear stress. We find that the recirculation bubbles after the perforated ribs are significantly small

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Wang, Jianhua, Huichun Liu, Mao Mao, Xu Li, and Zhiqiang Zhang. "Numerical Investigations of Fluid Flow and Heat Transfer Performances of Semiattached Rib Channel Design." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22563.

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In order to enhance the convective heat transfer within cooling air flow channels, fully attached rib-designs have been widely used in the designs of turbine blades. To reduce the friction loss and the low heat transfer areas caused by the added ribs, permeable and detached ribs have been discussed. This work focuses on a novel rib-design, between the fully attached and detached ribs, which is therefore called semiattched rib here. To effectively reduce the low heat transfer region within the fully attached rib channel, two rectangular holes are excavated at the base of a straight rib at both

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Taslim, M. E., and A. Lengkong. "45° Round-Corner Rib Heat Transfer Coefficient Measurements in a Square Channel." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-176.

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Cooling channels, roughened with repeated ribs, are commonly employed as a means of cooling turbine blades. The increased level of mixing induced by these ribs enhances the convective heat transfer in the blade cooling cavities. Many previous investigations have focused on the heat transfer coefficient on the surfaces between these ribs and only a few studies report the heat transfer coefficient on the rib surfaces themselves. The present study investigated the heat transfer coefficient on the surfaces of 45°, round-comer ribs. Three staggered rib geometries corresponding to blockage ratios of

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Raporty organizacyjne na temat "Rib area"

Schuller, Reid, and Ian Grinter. Fish Creek Rim Research Natural Area: guidebook supplement 50. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2016. http://dx.doi.org/10.2737/pnw-gtr-946.

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Singman, L. V. An aerial radiological survey of the project Rio Blanco and surrounding area. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10116646.

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Burbano Figueroa, Oscar, Milena Moreno Moran, Lorena Osorio Almanza, et al. Identification of resistance to ramulosis caused by Colletotrichum gossypii var. cephalosporioides in cotton advanced breeding lines and monitoring of ramulosis disease by RGB-image analysis. Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA, 2016. http://dx.doi.org/10.21930/agrosavia.informe.2016.2.

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Identification of resistance to ramulosis caused by Colletotrichum gossypii var. cephalosporioides in cotton advanced breeding lines and monitoring of ramulosis disease by RGB-image analysis Abstract Cotton growing regions in South America are affected by Colletotrichum gossypii var. cephalosporioides (Cgc). The most severe epidemics provokes considerable yield reductions linked to meristem necrosis, oversprouting, excessive branching and stunting (Figure 1). The Sinu Valley is a major cotton producer in Colombia and is heavily affected by this disease. Rainfall was identified as the main driv

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Megersa, Kelbesa, Ludovic Bernad, Yves Nsengiyumva, Benjamin Byinshi, Naphtal Hakizimana, and Fabrizio Santoro. Digital Merchant Payments as a Medium of Tax Compliance: RiB 87. Institute of Development Studies, 2023. http://dx.doi.org/10.19088/ictd.2023.028.

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Digital merchant payments – transactions between traders, or between traders and customers using digital means of payment – can promote tax compliance by providing access to safer, quicker formal payments for consumers, and leaving a digital trail of sales data that can be accessed by tax administration. This study examines how far the potential of digital merchant payments to increase tax compliance is being realised in Rwanda, and whether fees imposed by mobile network operators on digital financial services (DFS) can hinder both DFS adoption and tax compliance. It uses original survey data

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Connell, Sean D. Geologic map of the Albuquerque - Rio Rancho metropolitan area and vicinity, Bernalillo and Sandoval counties, New Mexico. New Mexico Bureau of Geology and Mineral Resources, 2008. http://dx.doi.org/10.58799/gm-78.

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This is the most comprehensive compilation of the geology of the Albuquerque Basin to be printed in 30 years. The area covered by this new compilation, though not as large as the earlier map, is presented at a scale nearly four times the detail (1:50,000 scale compared to the earlier map's 1:190,000 scale). This new geologic map is a compilation of sixteen 7.5-min USGS quadrangle maps and encompasses an area from Tijeras Arroyo on the south to Santa Ana Mesa north of Santa Ana and San Felipe Pueblos, and from the crest of the Sandia Mountains westward across the Rio Grande and onto the Llano d

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Mills, Stephanie E., William Schermerhorn, Donald Hinks, and Geoffrey Phelps. Airborne Geophysical Survey of the Oquirrh Mountains, Utah. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/ds-1.

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In 1994, Kennecott Utah Copper Corporation (now Rio Tinto Kennecott Corporation) commissioned DIGHEM Inc. to collect an airborne geophysical survey over the entirety of the Oquirrh Mountains. The Oquirrh Mountains airborne geophysical survey contains electromagnetic (EM), aeromagnetic, aeroradiometric, and very low frequency (VLF) data over the most significant mineral-producing area in Utah and remains the most complete geophysical dataset over the mountain range to date. The survey represents a dataset that would be unfeasible to collect under modern airspace considerations. The data in this

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Amine, Razan, and Fabrizio Santoro. Mandating Digital Tax Tools as a Response to Covid: Evidence from Eswatini, RiB 83. Institute of Development Studies, 2023. http://dx.doi.org/10.19088/ictd.2023.007.

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To reduce physical contact, Covid-19 forced many tax authorities to embrace digital technologies for filing and payment. Pandemic control aside, e-filing and e-payment hold great promise in facilitating taxpayer compliance, increasing transparency and curbing opportunity for collusion (Okunogbe and Santoro 2021). Eswatini mandated e-filing for all income taxpayers in September 2020, through the online e-Tax platform. Subsequently, the tax administration launched a zero-cash-handling policy for tax payments in April 2021. Our paper evaluated the impact of the e-Tax mandate on income taxpayers’

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Wisdom, Harold W. Transportation costs for forest products from the Puget Sound area and Alaska to Pacific Rim markets. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1990. http://dx.doi.org/10.2737/pnw-rp-425.

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W.C. Adams. CONFIRMATORY SURVEY REPORT FOR THE SECTION 4 AREA AT THE RIO ALGOM AMBROSIA LAKE FACILITY NEW MEXICO. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1003836.

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