Academic literature on the topic 'Concentrated mass'
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Journal articles on the topic "Concentrated mass"
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Pelevin, A. E. "Ways of efficiency increasing of iron ore raw materials concentration technology." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 2 (March 10, 2019): 137–46. http://dx.doi.org/10.32339/0135-5910-2019-2-137-146.
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Iron ore raw materials quality to a great extent determines technical and economic indices of metallurgical production. A brief characteristic of main types of iron ores of Russia quoted. It was shown, that they require concentration for utilization them in metallurgical production. Concentration flow charts of main types of iron ores considered. Main ways of iron ore raw materials concentration flow charts perfection directed on concentrates quality increase, concentration specific costs decrease and increase of raw materials utilization complexity. At Lebedinsky mining and concentration complex (MCC) at the expense of additional milling and concentration of high quality concentrate, a super-concentrate is produced having the iron mass content no less than 69.5% and silica content no more than 3.5%. The increase of iron mass content is 1.5–2%. At Mikhajlovsky MCC additional concentration of regular concentrate with iron mass content 65.5–66% enables to produce a super-concentrate having the iron mass content no less than 69% and silica mass content no more than 3%. The increase of iron mass content is 3–3.5%. Fine hydraulic screening is used at Kostomuksha and Kovdor MCCs for adjusting of regular concentrates. The undersize of sizing screens is a high quality concentrate, and oversize fraction is an intermediate product subjected to additional milling and concentration. When using the fine hydraulic screening, the super-concentrates are not obtained. Indices of super-concentrates production with application of separation in an alternative magnetic field quoted. Low complexity of iron ore raw materials utilization is typical at concentration of hematitemagnetite quartzite ores. In Russia the hematite-magnetite quartzite ores are mined and concentrated at three MCCs as follows: Olenegorsky, Mikhajlovsky and Kimkano-Sutarsky. Flow-charts and indices of magneto-gravitation concentration quoted, applied for hematite concentrate production. Stage separation of not only tails but also of concentrates is one of methods of expenses decreasing. A diagram of concentrate stage separation with application of concentration method or fine screening considered. Results of industrial application of flow-charts with concentrate stage separation quoted, the application taken place at Kachkanar MCC with application of two methods – wet magnetic concentration and fine hydraulic screening.
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Kleinmann, S. G. "The Spatial, Temporal, and Photometric Properties of AGB Stars." International Astronomical Union Colloquium 106 (May 1993): 13–25. http://dx.doi.org/10.1017/s0252921100062576.
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The Two Micron Sky Survey (Neugebauer & Leighton 1969;TMSS) provides a census of AGB stars which is relatively insensitive to interstellar or circumstellar reddening, temporal variations, or differences in photospheric temperature. This paper summarizes results from recent analyses of all carbon, S type, and mass-losing M stars in the TMSS, including local surface densities, scale heights, and mass loss rates. All three groups are concentrated toward the plane; the mass-losing M stars appear least concentrated toward the plane but most strongly concentrated toward the galactic center. Results from the IRAS survey were used to determine the range of infrared colors of stars in each class, and to estimate their mass loss rates. Carbon stars have relatively higher 60 μm flux densities than oxygen-rich stars, and have relatively higher mass loss rates. The total mass loss rate is dominated by a small fraction of the stars in this sample. IRAS photometry and IRAS Low Resolution Spectometer data do not unambiguously distinguish carbon-rich and oxygen-rich stars in this sample. Future searches for stars with the greatest mass loss rates might concentrate on sources found to be variable in the IRAS survey, since a large fraction of the TMSS stars with the most massive envelopes are known Miras or infrared variables.
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Yong-feng, Yang, Wang Yan-lin, Chen Hu, and Wu Min-juan. "Dynamic Modeling and Response of a Rotating Cantilever Beam with a Concentrated Mass." Shock and Vibration 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/8935247.
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The rigid-flexible coupling system with a hub and concentrated mass is studied in this paper. Considering the second-order coupling of axial displacement which is caused by transverse deformation of the beam, the dynamic equations of the system are established using the second Lagrange equation and the assumed mode method. The simulation results show that the concentrated mass mainly suppresses the vibration and exhibits damping characteristics. When the nondimensional mass position parameterβ>0.67, the first natural frequency is reduced as the concentrated mass increases. Whenβ<0.67, the first natural frequency is increased as the concentrated mass increases. We also find the maximum first natural frequency nondimensional position for the concentrated mass.
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Özyiğit, H. "Linear Vibrations of Frames Carrying a Concentrated Mass." Mathematical and Computational Applications 14, no. 3 (December 1, 2009): 197–206. http://dx.doi.org/10.3390/mca14030197.
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Gómez, Delfina, Miguel Lobo, and Eugenia Pérez. "On a vibrating plate with a concentrated mass." Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics 328, no. 6 (June 2000): 495–500. http://dx.doi.org/10.1016/s1620-7742(00)00033-7.
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Mizusawa, T. "Vibrations of skew plates carrying a concentrated mass." Journal of Sound and Vibration 116, no. 3 (August 1987): 561–72. http://dx.doi.org/10.1016/s0022-460x(87)81384-6.
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ISHIKAWA, Satoshi, Shinya KIJIMOTO, Yosuke KOBA, Ryoma OWAKI, and Yuuki MORI. "Two-Dimensional Acoustic Analysis by Concentrated Mass Model." TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 79, no. 801 (2013): 744–48. http://dx.doi.org/10.1299/kikaib.79.744.
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ISHIKAWA, Satoshi, Takahiro KONDOU, and Kenichiro MATSUZAKI. "Nonlinear Pressure Wave Analysis by Concentrated Mass Model." Journal of System Design and Dynamics 3, no. 5 (2009): 827–40. http://dx.doi.org/10.1299/jsdd.3.827.
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ISHIKAWA, Satoshi, Takahiro KONDOU, and Kenichiro MATSUZAKI. "Nonlinear Pressure Wave Analysis by Concentrated Mass Model." Journal of System Design and Dynamics 4, no. 4 (2010): 646–59. http://dx.doi.org/10.1299/jsdd.4.646.
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ISHIKAWA, Satoshi, Takahiro KONDOU, Kenichiro MATSUZAKI, and Shota NAGANO. "Nonlinear Pressure Wave Analysis by Concentrated Mass Model." Journal of System Design and Dynamics 5, no. 6 (2011): 1388–401. http://dx.doi.org/10.1299/jsdd.5.1388.
Full textDissertations / Theses on the topic "Concentrated mass"
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Воропай, Алексей Валериевич, П. А. Егоров, and Евгений Сергеевич Малахов. "Нестационарное деформирование балок и пластин при наличии дополнительных опор и ребер жесткости." Thesis, Харьковский национальный университет им. В. Н. Каразина, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41156.
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Non-stationary vibrations of complex mechanical systems that can be considered in the form of beams and plates with various mechanical features are investigated. Modeling of features (concentrated masses, additional supports and stiffeners) is made by replacing their influence with non-stationary concentrated forces (reactions), which are determined from the solution of Volterra integral equations using Tikhonov's regularizing algorithm.
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Silva, Filho Amorésio Souza. "Desempenho de novilhas de corte em pastejo suplementadas com concentrados." Universidade Federal de Mato Grosso, 2015. http://ri.ufmt.br/handle/1/217.
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CAPES
Nesta pesquisa objetivou-se avaliar os efeitos da suplementação concentrada sobre o desempenho de novilhas de corte em pastejo no período das águas. O experimento foi realizado em propriedade rural localizada no município de Rondonópolis-MT nas coordenadas geográficas Latitude 16°28’ S e Longitude 54° 38’W. O Período experimental foi de dezembro de 2013 a maio de 2014, com duração 136 dias. Os tratamentos, constituídos pelo fornecimento de suplementação concentrada ao nível de 0; 0,5 e 1,0% do peso corporal (PC) dos animais, foram distribuídos em um delineamento em blocos casualisados com duas repetições (área). Cada uma das seis áreas experimentais foi composta por oito piquetes de 0,1 hectares e por uma área de 200 m2 de livre acesso aos animais, na qual foram alocados os comedouros e bebedouros. O método do pastejo adotado foi o de lotação rotacionada com carga animal variável. Foram utilizadas 36 novilhas (animais testes) com peso corporal (PC) médio 249,3 Kg e aproximadamente 16 meses de idade. Estes animais foram pesados no início e final do experimento após jejum de sólidos e líquidos de 14h. Outras dezesseis novilhas (animais reguladores) de iguais composições genéticas e contemporâneas aos animais testes foram adicionadas e removidas das áreas experimentais sempre que houve a necessidade de se ajustar a taxa de lotação à capacidade de suporte dos pastos. O ganho de peso diário dos animais testes foi utilizado para estimar o desempenho individual das novilhas. O ganho de peso por área (kg/ha) foi calculado com base nos ganhos de pesos individuais médios dos animais testes e no número de animais totais (testes e reguladores) de cada área experimental, animais dia/ha. Os componentes da massa de forragem (lâmina foliar, colmo e material senescente), e composição química da forragem foram estimados por ciclo de pastejo, a partir da amostragem de três piquetes de cada área experimental. Em cada um destes piquetes foram coletadas, no pré-pastejo e no pós-pastejo, três amostras de forragens para determinação dos componentes da massa de forragem. Para a composição química foi coletada, no pré-pastejo, uma amostra de forragem por piquete. A análise financeira por tratamento foi realizada considerando como receita a quantidade de arrobas produzidas e o preço de venda da arroba e como desembolsos os gastos com suplemento mineral, concentrado, adubos, vermífugo e mão de obra. As variáveis relacionadas à forragem foram analisadas estatisticamente considerando a estrutura da matriz de covariâncias composta simétrica com a utilização do procedimento MIXED do programa SAS. As variáveis relacionadas ao desempenho dos animais foram analisadas utilizando-se o procedimento GLM do mesmo programa. As médias foram comparadas pelo teste de tukey a 5% de probabilidade. Foram observados ganhos de pesos de individuais de 0,562; 0,746 e 0,895 kg/dia para os animais que receberam 0; 0,50 e 1,0% do PC de suplemento concentrado, respectivamente. Valores médios de 653, 958 e 1438 kg/ha de ganho de peso e 5,44; 6,02 e 7,70 UA/ha de taxa de lotação foram obtidos com 0; 0,50 e 1,0% do PC de suplementação concentrada, respectivamente. Não houve efeito de tratamento sobre a massa de lâmina foliar, massa de colmo, massa de material morto e massa de forragem total no pré-pastejo e no pós-pastejo. Todavia, essas variáveis foram influenciadas pelo ciclo de pastejo. As alturas do pasto no pré-pastejo foram influenciadas pela suplementação concentrada, com valores de 37,2; 37,6 e 42,9 cm para os níveis de suplementação concentrada de 0; 0,50 e 1,0% do PC, respectivamente. A composição química da forragem no pré-pastejo não foi alterada pelas estratégias de suplementação concentrada, com valores médios de médios de 7,7; 8,9 e 8,3% de PB e 64,1; 63,8 e 64,4% de FDN para os níveis de 0; 0,50 e 1,0% do PC de suplementação concentrada, respectivamente. A margem bruta obtida foi de 1081,5; 1131,6 e 1242,2 R$/ha para os níveis de 0; 0,50 e 1,0% do PC, respectivamente. A suplementação concentrada de novilhas de corte em pastejo no período das águas intensifica os ganhos de pesos individuais e por área e contribui com a rentabilidade do sistema de produção.
This study aimed to evaluate the effects of concentrate supplementation on performance of grazing beef heifers in the rainy season. The experiment was conducted in a rural property in the city of Rondonópolis-MT, located in the geographical coordinates Latitude 16°28’S, Longitude 54°38’W. The experimental period was from December of 2013 to May of 2014, lasting 136 days. The treatments were consisted of concentrated supplementation at the level of 0; 0.5 and 1.0% of body weight (BW) of the animals, being distributed in a randomized blocks with two repetitions (area). Each of the six experimental areas was composed of eight paddocks of 0.1 hectares and an area of 200 m2 with free access to the animals, in which the feeders and water drinkers were allocated. The grazing method adopted was the rotational stocking with variable stocking rate. It was used 36 heifers (testing animals) with BW with average of 249.3 kg and approximately 16 months old. These animals were weighed at the beginning and end of the experiment after 14 hours of solid and liquid fasting. Other 16 heifers (regulators animals) of the same genetic and contemporary compositions to the testing animals were added and removed from the experimental areas whenever there was a need to adjust the stocking rate on the pasture carrying capacity. The animal testing daily weight gain was used to estimate the performance of individual heifers. The weight gain per area (kg/ha) was calculated based on the average of individual weight gain of the testing animals and the total number of animals (testing and regulators) of each experimental area, animals day/ha. The components of the herbage mass (leaf blade, stem and senescent material) accumulation of forage and chemical composition of the forage were estimated by grazing cycle, from the sample of three paddocks of each experimental area. In each of these paddocks were collected three samples of forage, in the pre-grazing and post-grazing, to determine the mass of the components of forage. For the chemical composition, was collected a sample of forage per paddock in the pre-grazing. The financial analysis by treatment was carried out considering as revenue the amount of kilos produced and the selling price of kilos and as disbursements the expenditures on mineral supplement, concentrate, fertilizers, vermicides and labor. The variables related to the forage were analyzed statistically considering the structure of the compound symmetric covariance matrix using the SAS PROC MIXED. The variables related to the performance of the animals were analyzed using the GLM procedure of the same program. The averages were compared by Tukey test at 5% probability. It was observed individual gain of 0.562; 0.746 and 0.895 kg/day in animals were fed with 0; 0.50 and 1.0% of BW of concentrated supplement, respectively. Mean values of 653; 958 and 1438 kg/ha of weight gain and 5.44; 6.02 and 7.70 AU/ha of stocking rates were obtained with 0; 0.50 and 1.0% of concentrated supplementation of PC, respectively. There was no treatment effect on the leaf blade mass, stem mass, dead material mass and forage mass of the pre-grazing and post-grazing. However, these variables were influenced by grazing cycle. The grass heights in the pre-grazing were influenced by concentrated supplementation, with values of 37.2; 37.6 and 42.9 cm for the levels of supplementation of 0; 0.50 and 1.0% of BW, respectively. The forage chemical composition in the pre-grazing was not affected by concentrate supplementation strategies, with average mean values of 7.7; 8.9 and 8.3% crude protein and 64.1; 63.8 and 64.4% of NDF to levels of 0; 0.50 and 1% of concentrated supplementation of BW, respectively. The gross margin obtained was 1081.5; 1131.6 and 1242.2 R$/ha for levels of 0; 0.50 and 1.0% of BW, respectively. The concentrated supplementation of grazing beef heifers in the rainy season intensifies the individual weight gain by area and contributes to the production system profitability.
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Fersadou, Hala. "Etude de la libération de principes actifs depuis les émulsions concentrées : caractérisation et modélisation." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL083N/document.
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L’optimisation de l’incorporation et de la libération de principes actifs dans les produits formulés constitue un des enjeux majeurs des industries pharmaceutiques et cosmétiques. L'objectif principal de notre étude est de proposer un modèle prédictif de la diffusion de petites sondes au sein des émulsions concentrées. Pour cela, il a fallu considérer à la fois la formulation d’émulsions concentrées stables et leur caractérisation rhéologique et structurelle ainsi que la prédiction des paramètres de transfert des sondes au sein des émulsions concentrées. On entend par paramètres de transfert, tous les paramètres permettant de caractériser les différents mécanismes de transfert de sondes dans les émulsions concentrées pris en compte dans notre système, à savoir le coefficient de diffusion dans les phases continue et dispersée, le coefficient de transfert à l’interface eau/huile, le coefficient de partage à l’équilibre de la sonde entre les deux phases de l’émulsion. Une nouvelle approche de caractérisation de la structure des émulsions concentrée a permis l’obtention des paramètres importants de structure (taille des gouttes et épaisseur du film de la phase continue). L’étude détaillée des mécanismes et processus diffusionnels est réalisée avec la prise en compte des résultats liés à la caractérisation structurelle du système d’étude. Ainsi, un modèle de diffusion fondé sur une approche phénoménologique est proposé pour prédire l'évolution des profils de concentration de la sonde dans les émulsions concentrées. Les cinétiques expérimentales de libération des sondes sont comparables à celles simulées par le modèle sans paramètres ajustables. Cette comparaison montre une bonne adéquation entre le modèle de diffusion et l’expérienceIn the field of controlled release technology for new drugs, models that can predict its delivery during application are important for device design. The main objective of this work is to develop a predictive model able to describe the drug delivery from highly concentrated water-in-oil emulsions. These systems consist of deformed droplets dispersed in a continuous film. Their structure’s characteristics make them favourable for their use as releasing devices. A combination of different transfer mechanisms has been implemented in a mathematical model in order to simulate release experiments under different operating conditions (volume fraction, oil/surfactant ratio). A sensitivity analysis has been performed to point out the most relevant parameters affecting the drug’s release: drug partition and diffusion coefficients. Partition coefficient of the drug for different surfactant concentrations has been obtained through a predictive thermodynamic model UNIFAC, and the diffusion coefficient using Chang and Wilke equations in addition to the Stefan- Maxwell development. An original and simple technique has been used to determine indirectly the mean droplet size of the concentrated emulsions, through measurements of continuous phase’s thickness by analysis of incoherent polarized steady light transport through emulsion samples. In a general view, the diffusion model proposed for small drug diffusion in concentrated emulsions, which was first proposed for diluted emulsions, predicts successfully the evolution of mandelic acid concentrations during release experiments undertaken in perfect sink conditions
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SILVA, Veralúcia Severina da. "Transferência de calor e massa em materiais com forma complexa via método da análise concentrada. Estudo de caso: secagem de materiais cerâmicos." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/930.
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A secagem é um processo termodinâmico, em que há transferência simultânea de calor e a remoção da umidade de um material poroso. Os produtos argilosos quando expostos a uma secagem sem controle pode sofrer fissuras e deformações, reduzindo sua qualidade póssecagem. Este trabalho tem como objetivo estudar teórico e experimentalmente a transferência de calor e massa em sólidos com forma complexa com, com ênfase a secagem de materiais cerâmicos argilosos. Neste trabalho desenvolveu-se um modelo matemático para descrever as trocas de calor e massa durante o processo de secagem, utilizando o método da capacitância global em corpos vazados. A solução analítica das equações governantes foi feita usando o método de separação de variáveis. Foram realizados experimentos de caracterização química e terrmo-hídrica da argila, e secagem de materiais cerâmicos argilosos vazados e com formas não-convencionais, em diferentes temperaturas (60, 70, 80, 90 e 100ºC). Resultados da composição química e granulometria da argila, e cinéticos de perda de massa e aquecimento das peças cerâmicas são apresentados e analisados. Verificou-se que o processo de perda de umidade ocorre a uma velocidade mais baixa do que o aquecimento do material cerâmico, que a temperatura e forma do corpo afetam fortemente os fenômenos de transporte de calor e massa, que a secagem a baixa temperatura favorece a redução de problemas no material pós secagem e melhoramento na qualidade final, e que os números de Biot de transferência de calor e de massa influenciam diretamente no tempo que o produto atinge sua condição de equilíbrio. A comparação entre o teor de umidade e temperatura preditos pelo modelo matemático proposto e os dados experimentais permitiu a estimativa dos coeficientes de transferência de massa e calor na superfície do material, com boa precisão.
Drying is a thermodynamic process, in which there is simultaneous heat transfer and moisture removal of a porous material. Clay products exposed to drying without control may suffer cracks and deformations, reducing its quality post-drying. This work aims to study theoretical and experimental the drying of solids with complex shape. It was developed a mathematical model to describe heat and mass transfer during the drying process, using the global capacitance method of hollow bodies. The analytical solution of the governing equations was made using the variable separation method. It were realized experiments of chemical and thermo-hydric characterization of clay, and drying of hollow and non-conventional clay ceramic materials at different emperatures (60, 70, 80, 90 and 100ºC). Results of the chemical composition and granulometry, and mass loss and heating of ceramic parts are presented and analyzed. It was verified that the moisture loss process occurs at a lower velocity than the heating of the ceramic material, the temperature and body shape strongly affect heat and mass transport phenomena, drying at low temperature favors the reduction of the problems in the material post-drying and improvement in the final quality, and that Biot numbers of heat and mass transfer directly affect the time to the product to reach its equilibrium condition. Comparison between predicted and experimental moisture content and temperature permitted estimative of the convective heat and mass transfer coefficients at the surface of the material, with good precision.
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LIMA, Wanderson Magno Paiva Barbosa de. "Transferência de calor e massa em sólidos porosos com geometria complexa via análise concentrada: modelagem e simulação." Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/371.
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O processo de secagem consiste na remoção de umidade de um material através do aquecimento, envolvendo mecanismo simultâneo de transferência de calor e massa entre o material e o ar de secagem, sendo uma importante etapa na conformação de um material cerâmico e argiloso. Neste sentido, este trabalho objetiva a simulação da secagem de sólidos vazados e com forma arbitraria. Para descrever o processo de secagem de materiais porosos utilizou-se o método da capacitância global. A aplicação tem sido feita para a secagem de materiais cerâmicos afim de obter resultados cinéticos de perda de massa e calor dos mesmos. Foram simulados diferentes casos variando-se a forma do corpo, de onde obteve-se as cinéticas de secagem (perda da umidade) e aquecimento do sólido (aumento de temperatura). Observou-se que o processo de perda de umidade ocorre numa menor velocidade que o aquecimento do material cerâmico, pois a sua difusividade térmica é muito superior a difusividade de massa, e que o formato do sólido, particularmente a sua relação área/volume afeta fortemente os fenômenos de transporte de calor e massa.
The drying process consists of the removal of moisture from a material through heating, involving simultaneous heat and mass transfer between the material and the drying air, being an important step in the formation of a clay and ceramic material. In this sense, this work aims at simulating the drying of cast and cast solids. To describe the drying process of porous materials, the global capacitance method was used. The application has been made for the drying of ceramic materials in order to obtain kinetic results of loss of mass and heat of the same. Different cases were simulated by varying the shape of the body, from which the kinetics of drying (loss of moisture) and heating of the solid (temperature increase) were obtained. It was observed that the process of moisture loss occurs at a slower rate than the heating of the ceramic material, because its thermal diffusivity is much higher than mass diffusivity, and that the shape of the solid, particularly its area / volume ratio strongly affects The phenomena of heat and mass transport.
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Lui, Maria Cristina Youn. "Estudo do balanço de massa e do perfil de isoflavonas no processamento de isolado e concentrados proteicos de soja." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255853.
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Orientador : Yong Kun ParkDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Mestrado
Mestre em Ciência de Alimentos
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Ara?jo, It?nia Maria Medeiros de. "Desempenho de novilhos alimentados com dieta suplementar em pastos de capim-momba?a." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17191.
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Previous issue date: 2014-02-27Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The objective of this work was to evaluate the effect of supplements feeding on growth of calves grazing a Panicum maximum cv. Momba?a pasture during the dry season. The experimental design was a randomized blocks with three treatments and three replications. The treatments were: mineral salt ad libidum; multiple mixture (MM) fed at 0.2% of live weight (PV); and, concentrate feed (SC) fed at 0.7% of PV. Thirty six weaned calves averaging eight months and 192 kg of initial live weight were utilized. The masses and pasture components, nutritive value and rate of forage growth were evaluated. Animal performance was measured as average daily gain (ADG) and live weight gain (LWG). The supplemental feeding was adjusted after weighing. There was no difference between periods for forage mass and leaf: stem ratio. The highest values for forage green mass, leaf blades mass and stem percentage were observed in the first trial period. The canopy height and the available forage on offer did not differ among treatments. The percentage of dead was higher for the last periods of evaluation. The leaf: stem ratio and the leaf percentage were greater in the second period. There was significant difference (p<0,05) among treatments for the ADG and were 250, 460 and 770 g/day for salt, MM and SC, respectively. The biggest LWG was observed in the treatment SC. contents of PB, DIVMO, NDF and LDA on leaf blades, thatched roofs and dead material dead not differ among treatments. The highest GPV was observed in the SC treatment. The contents of PB, DIVMO, NDF and LDA for leaf blades stem and dead material did not differ among treatments. Independent of the use supplements , it is possible to keep steers gaining weight, during dry season, since the stocking rate is appropriately adjusted
O objetivo deste trabalho foi avaliar o efeito de suplementos na recria de bovinos em pastos de Panicum maximum cv. Momba?a na ?poca seca. Utilizou-se o delineamento experimental de blocos ao acaso, com tr?s tratamentos e tr?s repeti??es. Os tratamentos constitu?ram-se de: sal mineral ? vontade; mistura m?ltipla (MM), fornecida a 0,2% do peso vivo (PV); e, suplemento concentrado (SC), fornecido a 0,7% do PV. Foram utilizados 36 bezerros desmamados, com idade m?dia de oito meses e peso m?dio inicial de 192 kg. Mensalmente, os pastos foram amostrados para as estimativas de altura, massa de forragem (MF), massa de forragem verde (MFV), massa de l?mina foliar (MLF), porcentagens de folha (PF), colmo (PC) e morto (PM), rela??o folha:colmo (RFC) e folha:n?o folha, oferta de forragem e taxa de ac?mulo de forragem (TAF), sendo os dados agrupados em quatro per?odos. Os animais foram pesados a cada 28 dias e a produ??o animal foi avaliada quanto ao ganho m?dio di?rio (GMD) e ganho de peso vivo por ?rea (GPV). A quantidade de suplemento foi ajustada a cada pesagem. N?o houve diferen?a entre per?odos para a massa de forragem e rela??o folha:colmo. Os maiores valores para massa de forragem verde, massa de l?mina foliar e porcentagem de colmo foram observados no primeiro per?odo de avalia??o. A altura do dossel e a oferta de forragem n?o diferiram entre os tratamentos. A porcentagem de material morto foi maior nos ?ltimos per?odos de avalia??o. A rela??o folha:n?o folha e a porcentagem de l?mina foliar foram maiores no segundo per?odo. O GMD foi de 250, 460 e 770 g/animal/dia, respectivamente, para sal, MM e SC. O maior GPV foi observado no tratamento SC. Os teores de PB, DIVMO, FDN e LDA nas l?minas foliares, colmo e material morto n?o diferiram entre os tratamentos. Independente do uso de suplementos, ? poss?vel manter o ganho de peso dos animais durante a esta??o seca, desde que a taxa de lota??o seja ajustada de forma adequada
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Chetouane, Yasmine. "Nouvelles stratégies de détection de la contamination bactérienne des concentrés de plaquettes." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0252.
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La contamination bactérienne des concentrés plaquettaires (CPs) représente le risque le plus fréquent d'infection transmise par transfusion. Malgré les progrès techniques accomplis dans le dépistage des agents infectieux, le risque de transmission de ces agents par transfusion ne peut encore être considéré comme totalement maîtrisé. Nous avons pu développer une méthode de détection par la technique de MALDI-TOF. Notre protocole permet une détection dans un délai de 8 heures à de faibles concentrations bactériennes.Nous avons évalué les performances d’un automate d’hémoculture, le VersaTREK, par rapport au Bactec, qui est fréquemment utilisé par les centres de transfusion. Nos résultats démontrent son intérêt dans la détection de la contamination bactérienne des CPs. Afin de caractériser l’origine de la contamination bactérienne, nous avons comparé, dans une étude rétrospective, les espèces bactériennes identifiées dans les hémocultures des patients de l’hôpital de la Timone, à celles identifiées dans des poches de CPs contaminés. Les espèces responsables de la contamination des CPs sont essentiellement issues de la flore cutanée. Elles sont donc différentes des espèces responsables d’épisodes de bactériémies.Ainsi, ce travail propose de nouvelles méthodes de détection de la contamination bactérienne. La mise en œuvre de ces nouvelles stratégies de diagnostic couplées à une meilleure connaissance de la prévalence et de l’origine de la contamination bactérienne des CPs pourrait permettre d’améliorer davantage la prévention et la réduction de la morbi-mortalité induite par une transfusion de CPsBacterial contamination of platelet concentrates (PCs) is the most common risk of transfusion-transmitted infection. Despite better control of the elements of the technical progress achieved in the detection of infectious agents, the risk of transmission of these agents by transfusion cannot yet be considered as totally mastered. We have developed a method for detecting PCs contamination by MALDI-TOF. To the best of our knowledge, this is the first time that MALDI-TOF is used in the detection of microbial contamination in a complex medium such as PCs. Our protocol allows detection within 8 hours at low bacterial concentrations. In a second step, we evaluated the performance of a blood culture machine, VersaTREK®, compared to Bactec®, frequently used by transfusion centers. Our results demonstrate its interest in the detection of bacterial contamination of PCs. In order to characterize the origin of bacterial contamination of PCs, we compared in a retrospective study, bacterial species identified in patients' blood cultures treated at the Timone hospital, with those identified in infected PC units. The species responsible for the contamination of the PCs are mainly resulting from the cutaneous flora and are therefore different from the species responsible for episodes of bacteremia.Thus, this work proposes new methods for detecting bacterial contamination. The implementation of these new diagnostic strategies coupled with a better knowledge of the prevalence and origin of bacterial contamination of PCs could further improve the prevention and reduction of both morbidity and mortality induced by blood transfusion of PCs
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Романько, Сергій Миколайович, Сергей Николаевич Романько, and Serhii Mykolaiovych Romanko. "Процес концентрування розчину сульфатної кислоти випаровуванням у потік нейтрального газу за зовнішнього підведення теплоти." Thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/72649.
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Дисертаційна робота присвячена виявленню закономірностей процесу концентрування водних розчинів сульфатної кислоти випаровуванням в потік нейтрального газу за умов зовнішнього підведення теплоти. Такий процес дозволяє понизити температуру теплоносія, який використовується для нагрівання розчину кислоти, і відповідно відмовитись від дефіцитних видів палива. У дисертації представлено результати експериментального дослідження впливу нейтрального газу та режимних параметрів процесу на інтенсивність процесу концентрування розчину. Запропоновано методику визначення швидкості випаровування розчину кислоти та експериментально встановлено її залежності від складу розчину. Проведено дослідження тепло- і масопереносу при концентруванні, визначено величини потоків теплоти при теплообміні між рідкою і газовими фазами, встановлено умови, за яких теплообмінний потік міняє напрям. Отримано емпіричні рівняння для розрахунку швидкості випаровування розчину кислоти та коефіцієнтів тепло – і масовіддачі при його концентруванні. У результаті моделювання зазначеного процесу встановлено закономірності зміни складу розчину в часі для періодичного процесу і від величини потоку початкового розчину для безперервного процесу при різних режимах концентрування. Розроблено пропозиції щодо апаратурного оформлення цього процесу на основі типового ємнісного апарату і апарату плівкового типу, а також методику розрахунку періодичного і безперервного процесів концентрування в ємнісному концентраторі.Диссертационная работа посвящена выявлению закономерностей процесса концентрирования водных растворов серной кислоты испарением в поток нейтрального газа при внешнем подводе теплоты. Такой процесс позволяет снизить температуру используемого для нагревания раствора кислоты теплоносителя, и соответственно отказаться от дефицитных видов топлива. В диссертации представлены результаты экспериментального исследования влияния нейтрального газа и режимных параметров процесса на интенсивность процесса концентрирования раствора. Предложена методика определения скорости испарения раствора кислоты и экспериментально установлены ее зависимости от состава раствора. Проведено исследование тепло- и массопереноса при концентрировании, определены величины потоков теплоты при теплообмене между жидкой и газовыми фазами, установлены условия, при которых теплообменный поток меняет направление. Получены эмпирические уравнения для расчета скорости испарения раствора кислоты и коэффициентов тепло- и массоотдачи при его концентрировании. В результате моделирования отмеченного процесса установлены закономерности изменения состава раствора во времени для периодического процесса и от величины потока начального раствора для непрерывного процесса при разных режимах концентрирования. Разработаны предложения по аппаратурному оформлению этого процесса на основе унифицированного емкостного аппарата и аппарата пленочного типа, а также методику расчета периодического и непрерывного процессов концентрирования в емкостном концентраторе.
The thesis presents the results of an experimental investigation of the influence of indifferent gas, which is injected into the free space above acid solution or bubbled through it, and operating conditions of the process on the intensity of the solution concentration process. A method of determining the acid solution evaporation rate has been suggested, and its dependences on the solution composition that confirm the presence of the critical acid concentration in the solution, at which the acid (H2SO4 monohydrate) starts evaporating along with water, have been determined experimentally. It has been shown that, within the range of solution concentration values before and after the critical concentration, the dependences of the evaporation rate on the solution composition are of a different nature. The study of concentration heat transfer and mass transfer has been carried out, the heat flux values at heat exchange between liquid and gaseous phases have been determined, and the conditions, at which the heat-exchange flow changes its direction, have been ascertained. By means of modelling the aforementioned process, the regularities of the solution composition change over time for a batch process and the dependences on the initial solution flow value for a continuous process at different concentration conditions have been determined. The suggestions have been made concerning the equipment needed for this process on the basis of a standard capacitive apparatus and a film apparatus, as well as the methods of calculating the batch and continuous concentration processes in the capacitive concentrator.
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Migeon, Valérie. "Application des isotopes du molybdène en traçage des matériaux du cycle nucléaire." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEN008/document.
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Au cours de ces dernières décennies, des études ont étés menées pour identifier plusieurs traceurs des matériaux du cycle du combustible nucléaire, dans le cadre de la lutte contre la prolifération nucléaire. Ces matériaux sont généralement collectés lors d’inspections dans des installations nucléaires, ou saisis lors de contrôles de trafics illicites. Les informations fournies par ces traceurs sont parcellaires et ne permettent pas de déterminer avec exactitude la provenance et l’historique industriel de ces matériaux.Le but de ce travail de thèse est de démontrer le potentiel de l’utilisation des isotopes du molybdène pour le traçage des matériaux du cycle du combustible nucléaire. Le choix s’est porté sur le molybdène car en raison de la similarité de leurs propriétés chimiques, le molybdène et l’uranium sont étroitement associés dans les minerais d’uranium et tout au long de la chaîne de purification de l’uranium. L’étude s’est focalisée sur une partie de l’amont du cycle du combustible, depuis l’extraction des minerais d’uranium jusqu’à la production des concentrés miniers d’uranium : divers procédés physiques et chimiques sont appliqués, à la fois pour purifier l’uranium et abaisser la concentration en molybdène.Au cours de cette étude, une nouvelle méthode de séparation du molybdène a été développée pour caractériser sa composition isotopique dans des minerais, minéraux et concentrés miniers d’uranium. La variabilité des compositions isotopiques du molybdène dans un gisement d’uranium est principalement due aux mécanismes d’adsorption et/ou de précipitation du molybdène. Les gisements magmatiques et sédimentaires ont des compositions isotopiques différentes, ce qui permet ainsi leurs distinctions. Les concentrés miniers d’uranium produits à partir de ces deux types de gisements ont des compositions isotopiques similaires aux minerais. Ces résultats soulignent ainsi le potentiel des isotopes du molybdène comme traceur des origines des concentrés miniers d’uranium. Cependant, un fractionnement des isotopes du molybdène a été établi lors de la production des concentrés miniers d’uranium pour deux usines au Niger. Les procédés de purification de l’uranium tels que la lixiviation, l’extraction par solvant et la précipitation ont été reproduits en laboratoire sur des échantillons réels pour expliquer le fractionnement isotopique du molybdène lors de la production des concentrés miniers. Au cours de ces procédés, le fractionnement peut être positif (lixiviation), négatif (extraction par solvant, précipitation à l’eau oxygénée) ou nul (précipitation à l’ammoniaque). Dans le cas des échantillons du Niger, la somme de ces procédés est négative, dans le sens des données expérimentales que nous avons obtenues, démontrant ainsi également le potentiel de l’utilisation des isotopes du molybdène comme traceur des procédés de transformations des matériaux du cycle du combustible nucléaireNuclear forensics aims at determining the age, provenance as well as industrial or storage history of uranium ores and uranium ore concentrates that are part of the nuclear fuel cycle. Several potential tracers have already been identified for this purpose. However, these tracers are not providing always unambiguous information. This study is focused on establishing Mo isotopes as a new tracer of uranium ore provenance and of ore processing for its application in nuclear forensics. Molybdenum and uranium share a number of common geochemical properties. In the nuclear fuel cycle, molybdenum is an impurity that is difficult to separate during uranium extraction and purification processes, while its concentration is required to be lower than some specification limits. We focused this study on the first part of the nuclear fuel cycle, from the uranium ores extraction to the production of uranium ore concentrates.We developed an enhanced separation method for Mo from a uranium-rich matrix (uranium ores, uranium minerals, uranium ore concentrates) in order to analyze the mass fractionation induced by processes typical of the nuclear fuel cycle. Molybdenum isotopic compositions in uranium ores depend of adsorption and precipitation processes. The δ98Mo values of sedimentary uranium ores is shifted to negative values relative to magmatic ores. This provides a means of distinguishing these types of uranium ores. Uranium ores concentrates produced from both uranium ore natures (magmatic and sedimentary) have Mo isotope compositions similar to the uranium ores. These results suggest that molybdenum isotopes have a strong potential of as a tracer for identifying the origin of the uranium ore concentrates. However, Mo isotopes fractionations were established during the production of uranium ore concentrates in the both Niger mills. We reproduced in laboratory the lixiviation, solvent extraction and precipitation processes to explain these observations. The Mo isotopes fractionation is positive for the lixiviation process, negative for the solvent extraction and precipitation with hydrogen peroxide, and null for ammonia precipitation. In the case of the Niger samples, the sum of these processes is negative and agrees with our experimental data. Mo isotopes have a strong potential as a tracer for identifying the origin and transformation of uranium in the nuclear fuel cycle, in the framework of nuclear forensics
Books on the topic "Concentrated mass"
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Detra, D. E. Analytical results and sample locality maps of heavy-mineral-concentrate samples from the Morongo Valley (CDCA 218) and Mecca Hills (CDCA 343) wilderness study areas, San Bernardino and Riverside Counties, California. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.
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Detra, D. E. Analytical results and sample locality maps of heavy-mineral-concentrate samples from the Morongo Valley (CDCA 218) and Mecca Hills (CDCA 343) wilderness study areas, San Bernardino and Riverside Counties, California. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1985.
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McChesney, Robert Waterman. The problem of the media: U.S. communication politics in the twenty-first century. New York: Monthly Review Press, 2004.
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V, Kaza K. R., and United States. National Aeronautics and Space Administration., eds. Concentrated mass effects on the flutter of a composite advanced turboprop model. [Washington, DC]: National Aeronautics and Space Administration, 1987.
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Kay, Tamara, and R. L. Evans. Mobilizing Public and Legislative Hostility against NAFTA. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190847432.003.0005.
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This chapter examines how activists used outsider strategies and mobilized public pressure to increase legislative opposition to NAFTA during the substantive treaty negotiations that followed passage of fast-track reauthorization. It focuses on activists’ mobilization of a mass movement of NAFTA opponents during the year and a half of NAFTA’s substantive negotiations beginning in June 1991 until President Bush signed the agreement in December 1992. While the AFL-CIO and some environmentalists concentrated on insider strategies, labor unions and the majority of environmental organizations created a strong anti-NAFTA grassroots coalition and mobilized; they held local protests and rallies, wrote press releases, held forums with community groups and local politicians, and appeared in media outlets in over one hundred cities. The chapter also reveals how activists’ pressure led to the negotiation of additional labor and environmental side agreements.
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Epstein, Ben. Introduction. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190698980.003.0001.
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This introduction serves several important goals. It lays out both the research objective and theoretical framework placing this study on an interdisciplinary foundation that combines work from political science, American political development, mass communication, history, and diffusion studies. It introduces the core concepts of the book, concentrated around a recurring multistage process called the political communication cycle (PCC). The three stages of the PCC, detailed in the following chapters, include the information and communications technology (ICT)–focused technological imperative phase; the political choice phase, which emphasizes the behavioral process central to innovation; and stabilization through the establishment of new norms, regulations, and institutions. This process has repeated throughout history, where long periods of relative stability, known as political communication orders (PCOs), are disrupted by shorter periods of permanent change, identified as political communication revolutions (PCRs). The introduction concludes by introducing the three claims that are used throughout the book and outlining the chapters that follow.
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Ellam, Rob. 6. Measuring isotopes. Oxford University Press, 2016. http://dx.doi.org/10.1093/actrade/9780198723622.003.0006.
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Mass spectrometers have become routine laboratory instruments in many disciplines. ‘Measuring isotopes: mass spectrometers’ concentrates on those used to quantify the abundance of different isotopes—gas source isotope ratio, thermal ionization, inductively coupled plasma, and secondary ion mass spectrometers. A mass spectrometer can be used to quantify the concentration of a particular element by monitoring an isotope of that element not overlapped by isotopes of other elements. All mass spectrometers have three essential components: an ion source, a mass filter, and a detector. There are two main types of detector: Faraday detectors measure large signals and a variant of photomultiplier tubes measures small isotope signals.
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Howell, Charlotte E. Divine Programming. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190054373.001.0001.
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Divine Programming chronicles how the Hollywood television industry negotiated Christianity’s middle-American associations as attention to elite audiences increased from 1996 to 2016. From Touched by an Angel and 7th Heaven to Preacher and Daredevil, this book explores how Christianity has been used and discussed within the cultures of Hollywood television production. During this twenty-year span, Christian representation on television dramas evolved to exemplify the cultural divide between white middle America and concentrated urban elites. To balance a diminishing and fractured audience, upscale secular audience niches have become increasingly significant to the development and positioning of serial dramatic television since the 1990s, displacing the power that the mass, middlebrow, and assumed Christian audience previously held. As the importance of that middle-American audience waned during this period, creatives paradoxically used white Christianity’s stories and tropes with greater frequency and different strategies. Once white Christianity had become associated with middlebrow tastes, its representation, to appeal to elite audiences, had to be othered, shifted into the unreality of fantastic genres, and eventually—tentatively—acknowledged and used when the potential reward outweighed the legacy sense of risk. This process was dynamic and required constant, difficult negotiation between using Christianity as part of a show’s plot and attempting to avoid its religious, cultural, and class-based associations.
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Cubitt, Sean. Anecdotal Evidence. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190065713.001.0001.
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Ecocritique is a practice of radical questioning, as essential to the critical armoury as feminism and postcolonialism have become. Anecdotes are ecocritical because they focus on encounters, concentrated moments of crisis when social ordering and ecological forces clash. Bringing ecological criticism to bear on case studies of popular culture in the twenty-first century, Anecdotal Evidence argues that the humanities have a vital role to play in rethinking politics today. Treating contemporary Hollywood movies, streaming video media, and mass image databases as anecdotes about waste, debt, and obligation reveals the deep intertwining of history and ecology in culture. An original take on Anthropocene anxieties and technological paranoia, the book proposes that the digital humanities still need the traditional skills of close reading to understand our contemporary condition. Only because the environment has a history is it possible to intervene environmentally. Because we continually misrecognise the historical production of environments, the first task of ecocritique is to bring our formative concept of ecology into crisis. Its final task will be to achieve the good life for everything connected by the historical implication of humans in ecology, and ecology in humans. No politics can be undertaken in our times except through media: ecocritical humanities have a key role in rethinking ecopolitics in the twenty-first century.
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E, Gray J., and Taylor Charles D. 1946-, eds. Mineralogy and sample locality map of the nonmagnetic, heavy-mineral-concentrate samples, Iditarod quadrangle, Alaska. [Denver, CO]: U.S. Geological Survey, 1988.
Find full textBook chapters on the topic "Concentrated mass"
1
Fasano, Antonio, and Mario Primicerio. "Temperature Driven Mass Transport in Concentrated Saturated Solutions." In Progress in Nonlinear Differential Equations and Their Applications, 91–108. Basel: Birkhäuser Basel, 2005. http://dx.doi.org/10.1007/3-7643-7317-2_8.
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Hisano, S., S. Ishikawa, S. Kijimoto, and H. Iwamoto. "Structural-Acoustic Coupled Analysis by Concentrated Mass Model." In Vibration Engineering for a Sustainable Future, 9–15. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-46466-0_2.
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Muraoka, Mikio. "Enhanced Sensitivity of AFAM and UAFM by Concentrated-Mass Cantilevers." In Acoustic Scanning Probe Microscopy, 189–226. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27494-7_7.
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Vatin, Nikolai, Rustamkhan Abdikarimov, and Dadakhan Khodzhaev. "Nonlinear Vibrations of Orthotropic Viscoelastic Plates with a Concentrated Mass." In Lecture Notes in Civil Engineering, 132–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72404-7_14.
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Balice, V., C. Carrieri, B. Rindone, and A. Rozzi. "Monitored Biodegradation of Concentrated Waste Waters by Means of Traditional and Mass Spectrometric Methods." In Chemistry for the Protection of the Environment, 143–53. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3282-8_11.
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Mandal, Arpita, Chaitali Ray, and Salil Haldar. "Free Vibration Analysis of Laminated Composite Plates and Shells Subjected to Concentrated Mass at the Centre." In Recent Advances in Theoretical, Applied, Computational and Experimental Mechanics, 49–57. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1189-9_5.
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Liu, Zhen. "Concentrato: Transport of Dispersed Mass." In Multiphysics in Porous Materials, 123–38. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93028-2_13.
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Dentinho, Tomaz Ponce. "Concentrate Mass Tourism to Promote Sustainable Development." In Mediterranean Protected Areas in the Era of Overtourism, 371–82. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69193-6_19.
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Moebius, Stephan. "Reconstruction and Consolidation of Sociology in West Germany from 1945 to 1967." In Sociology in Germany, 49–84. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71866-4_3.
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AbstractThis chapter will focus on the two decades after 1945, the period of the “post-war society” (1945–1967), which in the historical sciences is also characterized as a period of boom (keywords: “Wirtschaftswunder” (“economic miracle”), expansion of the welfare state, expansion of the educational sector, certainty about the future) and which comes to an end in the 1970s. Germany was undergoing a profound process of change: socio-structural changes in an advanced industrial society, structural changes in the family and a retreat into the private sphere, new opportunities in the areas of consumption and leisure due to the “Wirtschaftswunder,” urbanization and changes in communities, “Western Integration” (“Westbindung”), the ban on the KPD (Communist Party of Germany) in 1956, remilitarization, the development of the mass media and mass motorization, and the repression of the Nazi past were central social and sociological issues. At the same time, fascist tendencies were still virulent during the 1950s and 1960s. After 1945, sociology had to be rebuilt. Journals were refounded or newly founded, the German Sociological Association was restored and sociology was re-established as a teaching subject. Different “schools” and regional centers of sociology emerged. The so-called Cologne School centered around René König, the Frankfurt School around Adorno and Horkheimer, and the circle around Helmut Schelsky should be mentioned in particular; but also, Wolfgang Abendroth, Werner Hofmann, and Heinz Maus (Marburg School), Otto Stammer (Berlin), Arnold Bergstraesser (Freiburg i.Br.), and Helmuth Plessner (Göttingen). Despite their theoretical and political differences, up until the 1950s, they all had in common the decisive will for political and social enlightenment regarding the post-war situation. Furthermore, the particular importance that empirical social research and non-university research institutions had for the further development of sociology after 1945 is worth mentioning.At the end of the 1950s, field-specific dynamics gained momentum. The different “schools” and groups tried to secure and expand their position in the sociological field and their divergent research profiles became increasingly visible. The so-called civil war in sociology drove the actors further apart. Additionally, disciplinary struggles and camp-building processes during the first 20 years of West German sociology revolved around the debate on role theory and the dispute over positivism. By the end of the 1950s, an institutional and generational change can be observed. The so-called post-war generation, which included Ralf Dahrendorf, Jürgen Habermas, Niklas Luhmann, Erwin K. Scheuch, Heinrich Popitz, Hans Paul Bahrdt, M. Rainer Lepsius, and Renate Mayntz, assumed central positions in organizations, editorial boards of journals, and universities. While the early “schools” and circles (König, Schelsky, Adorno, and Horkheimer) initially focused on the sociology of the family and empirical research, the following generation concentrated foremost on industrial sociology, but also on topics of social structure and social stratification as well as on social mobility.
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Liu, Tingyao, Yong Sheng, Teng Yang, Bao Wang, Lihui Han, and Qing Liu. "Numerical Simulation of the Mass Transfer for Rare-Earth Concentrate in Leaching Process." In Rare Metal Technology 2015, 135–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093244.ch16.
Full textConference papers on the topic "Concentrated mass"
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Goortani, Behnam Mostajeran, and Sayyed Taher Kermani Alghorayshi. "Solar Concentrated Energy Supply to Water-Ammonia Absorption Refrigerators." In International Conference of Fluid Flow, Heat and Mass Transfer. Avestia Publishing, 2017. http://dx.doi.org/10.11159/ffhmt17.193.
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Sha, Ganggang, Maciej Radzienski, Rohan Soman, Maosen Cao, and Wieslaw Ostachowicz. "Concentrated mass localization in beam-like structures using natural frequencies." In Health Monitoring of Structural and Biological Systems IX, edited by Paul Fromme and Zhongqing Su. SPIE, 2020. http://dx.doi.org/10.1117/12.2557950.
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Liu, Yun, and Yin Zhang. "Eigenfrequency Shift of Micro-sensor with the Concentrated Mass and Spring." In 2007 International Conference on Mechatronics and Automation. IEEE, 2007. http://dx.doi.org/10.1109/icma.2007.4303976.
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Kurokawa, Akira. "Directional mass analysis of ozone dissociation during thin oxide formation with highly concentrated ozone." In The 2000 international conference on characterization and metrology for ULSI technology. AIP, 2001. http://dx.doi.org/10.1063/1.1354396.
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Okada, Kenji, Ken-ichi Nagai, Shinichi Maruyama, and Takao Yamaguchi. "Effects of a Concentrated Mass on Chaotic Vibrations of a Clamped Circular Plate With Initial Deformation." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48271.
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Experimental results are presented on effects of a concentrated mass on chaotic vibrations of a clamped circular plate. The plate has initial deformation due to initial deflection and initial in-plane compressive constraint at the boundary. The concentrated mass is attached on the center of the plate. Under periodic excitation, non-periodic responses with dynamic snap-through are generated on the plates. The responses are inspected by the Fourier spectrum, the Poincare´ projection, the maximum Lyapunov exponents and the principal component analysis. The non-periodic responses are found to be chaotic responses. The lowest mode of vibration shows the largest contribution ratio. When the concentrated mass is attached on the plate, the region of the response is shifted to the lower frequency. Furthermore, the width of the frequency region is decreased. The contribution ratio of the lowest mode slightly increases.
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Reda, Ahmed M., Gareth L. Forbes, and Ibrahim A. Sultan. "Characterization of Dynamic Slug Flow Induced Loads in Pipelines." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83218.
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The flow of a liquid mass, i.e. a ‘slug’, inside thin-walled spanning pipelines, produces a lateral traversing force. This moving force initiates dynamic stresses within the structure and is often critical when assessing structural fatigue. Moving slugs in spanning pipelines may be modeled as either a moving concentrated force or a moving mass when investigating the vibration response of the pipeline under the passage of a slug flow. The moving concentrated force model only yields accurate results when the mass of the slug is small in relation to that of the pipeline; although, the moving mass model should be used instead when the slug’s mass cannot be regarded as small in relation to the mass of the pipeline. The modeling of a moving concentrated force is much more readily implemented than that of a moving mass. Thus, the aim of this paper is to identify those situations where the simplification of considering a moving concentrated force can be made, or indeed if dynamic analysis is even required. Results are given in this paper to quantify when the two modeling techniques begin to differ significantly. It is intended that this paper will assist pipeline engineers discriminate between which appropriate conditions to use for either of the two different models of a traversing concentrated force/mass over a structure.
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Yoon, Seung-Joon, and ji-Hwan Kim. "Effect of a concentrated mass on the spinning free-free beam subjected to a thrust." In 19th AIAA Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-1299.
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Radwan, Ali, Mahmoud Ahmed, and Shinichi Ookawara. "Performance Evaluation of Concentrated Photovoltaic System Using a Microchannel Heat Sink." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66724.
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The high incident heat flux on the concentrated photovoltaic (CPV) system causes a significant increase in the cell temperature and thus reduces the system efficiency. Therefore, using an efficient cooling technique is of great importance for those systems. In the present study, a new technology for concentrated photovoltaic systems is introduced using a truncated-double layer microchannel heat sink. A comprehensive three-dimensional thermo-fluid model for the photovoltaic layers integrated with a microchannel heat sink was developed. The proposed model was simulated numerically to estimate the solar cell temperature, temperature uniformity, cooling system pumping power, electrical efficiency and thermal efficiency of the CPV system. The numerical results were validated with the available experimental, analytical and numerical results in the literature. In the designed heat sink, various design parameters are investigated such as the truncation length, cooling mass flow rate, concentration ratio, and converging width ratio of the flow channel. Results indicate that increasing the truncated length leads to an increase of solar cell temperature at a constant coolant mass flow rate. The cell temperature varies between 80.1°C and 146.5°C as the truncation length ratio increases from 0 (i.e. single layer microchannel) to 1 respectively at a concentration ratio (CR) of 40 and a cooling mass flow rate (ṁ) of 26.6 g/min. Using the double layer microchannel reduces the consumed pumping power at the same total mass flow rate compared to the single layer microchannel. The Double layer configuration with a truncation length ratio (l/lsc) equal to unity achieves a lower pumping power and solar cell temperature uniformity in comparison to the single layer microchannel.
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Balaji, Shanmugapriya, K. S. Reddy, and Thirumalachari Sundararajan. "HEAT LOSS ESTIMATION OF LINEAR FRESNEL RECEIVER UNDER NON-UNIFORM CONCENTRATED SOLAR FLUX." In Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017). Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihmtc-2017.1960.
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"Flutter of cantilevered columns subjected to a rocket end thrust and having an intermediate concentrated mass." In 35th Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-1622.
Full textReports on the topic "Concentrated mass"
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Olander, Justin, and Melissa Flagg. AI Hubs in the United States. Center for Security and Emerging Technology, May 2020. http://dx.doi.org/10.51593/20200006.
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With the increasing importance of artificial intelligence and the competition for AI talent, it is essential to understand the U.S. domestic industrial AI landscape. A new CSET data brief maps where AI talent is produced, where it concentrates, and where AI equity funding goes. This mapping reveals distinct AI hubs emerging across the country, with different growth rates, investment levels, and potential access to talent.
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Shpigel, Muki, Allen Place, William Koven, Oded (Odi) Zmora, Sheenan Harpaz, and Mordechai Harel. Development of Sodium Alginate Encapsulation of Diatom Concentrates as a Nutrient Delivery System to Enhance Growth and Survival of Post-Larvae Abalone. United States Department of Agriculture, September 2001. http://dx.doi.org/10.32747/2001.7586480.bard.
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The major bottlenecks in rearing the highly priced gastropod abalone (Haliotis spp.) are the slow growth rate and the high mortality during the first 8 to 12 weeks following metamorphosis and settling. The most likely reason flor these problems is related to nutritional deficiencies in the diatom diet on which the post larvae (PL) feed almost exclusively in captivity. Higher survival and improved growth rate will reduce the considerable expense of hatchery-nursery resisdence time and thereflore the production costs. BARD supported our research for one year only and the support was given to us in order to prove that "(1) Abalone PL feed on encapsulated diatoms, and (2) heterotrophic diatoms can be mass produced." In the course of this year we have developed a novel nutrient delivery system specifically designed to enhance growth and survival of post-larval abalone. This approach is based on the sodium-alginate encapsulation of heterotrophically grown diatoms or diatom extracts, including appetite-stimulating factors. Diatom species that attract the PL and promote the highest growth and survival have been identified. These were also tested by incorporating them (either intact cells or as cell extracts) into a sodium-alginate matrix while comparing the growth to that achieved when using diatoms (singel sp. or as a mixture). A number of potential chemoattractants to act as appetite-stimulating factors for abalone PL have been tested. Preliminary results show that the incorporation of the amino acid methionine at a level of 10-3M to the sodim alginate matrix leads to a marked enhancement of growth. The results ol these studies provided basic knowledge on the growth of abalone and showed that it is possible to obtain, on a regular basis, survival rates exceeding 10% for this stage. Prior to this study the survival rates ranged between 2-4%, less than half of the values achieved today. Several diatom species originated from the National Center for Mariculture (Nitzchia laevis, Navicula lenzi, Amphora T3, and Navicula tennerima) and Cylindrotheca fusiformis (2083, 2084, 2085, 2086 and 2087 UTEX strains, Austin TX) were tested for heterotrophic growth. Axenic colonies were initially obtained and following intensive selection cycles and mutagenesis treatments, Amphora T3, Navicula tennerima and Cylindrotheca fusiformis (2083 UTEX strain) were capable of growing under heterotrophic conditions and to sustain highly enriched mediums. A highly efficient selection procedure as well as cost effective matrix of media components were developed and optimized. Glucose was identified as the best carbon source for all diatom strains. Doubling times ranging from 20-40 h were observed, and stable heterotroph cultures at a densities range of 103-104 were achieved. Although current growth rates are not yet sufficient for full economical fermentation, we estimate that further selections and mutagenesis treatments cycles should result in much faster growing colonies suitable for a fermentor scale-up. As rightfully pointed out by one of the reviewers, "There would be no point in assessing the optimum levels of dietary inclusions into micro-capsules, if the post-larvae cannot be induced to consume those capsules in the first place." We believe that the results of the first year of research provide a foundationfor the continuation of this research following the objectives put forth in the original proposal. Future work should concentrate on the optimization of incorporation of intact cells and cell extracts of the developed heterotrophic strains in the alginate matrix, as well as improving this delivery system by including liposomes and chemoattractants to ensure food consumption and enhanced growth.
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Perl-Treves, Rafael, Rebecca Grumet, Nurit Katzir, and Jack E. Staub. Ethylene Mediated Regulation of Sex Expression in Cucumis. United States Department of Agriculture, January 2005. http://dx.doi.org/10.32747/2005.7586536.bard.
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Monoecious species such as melon and cucumber develop separate male and female (or bisexual) flowers on the same plant individual. They display complex genetic and hormonal regulation of sex patterns along the plant. Ethylene is known to play an important role in promoting femaleness and inhibiting male development, but many questions regarding critical sites of ethylene production versus perception, the relationship between ethylene and the sex determining loci, and the possible differences between melon and cucumber in this respect are still open. The general goal of the project was to elucidate the role of ethylene in determining flower sex in Cucumis species, melon and cucumber. The specific Objectives were: 1. Clone and characterize expression patterns of cucumber genes involved in ethylene biosynthesis and perception. 2. Genetic mapping of cloned genes and markers with respect to sex loci in melon and cucumber. 3. Produce and analyze transgenic melons altered in ethylene production or perception. In the course of the project, some modifications/adjustments were made: under Objective 2 (genetic mapping) a set of new mapping populations had to be developed, to allow better detection of polymorphism. Under Objective 3, cucumber transformation systems became available to us and we included this second model species in our plan. The main findings of our study support the pivotal role of ethylene in cucumber and melon sex determination and later stages of reproductive development. Modifying ethylene production resulted in profound alteration of sex patterns in melon: femaleness increased, and also flower maturation and fruit set were enhanced, resulting in earlier, more concentrated fruit yield in the field. Such effect was previously unknown and could have agronomic value. Our results also demonstrate the great importance of ethylene sensitivity in sex expression. Ethylene perception genes are expressed in sex-related patterns, e.g., gynoecious lines express higher levels of receptor-transcripts, and copper treatments that activate the receptor can increase femaleness. Transgenic cucumbers with increased expression of an ethylene receptor showed enhanced femaleness. Melons that expressed a defective receptor produced fewer hermaphrodite flowers and were insensitive to exogenous ethylene. When the expression of defective receptor was restricted to specific floral whorls, we saw that pistils were not inhibited by the blocked perception at the fourth whorl. Such unexpected findings suggest an indirect effect of ethylene on the affected whorl; it also points at interesting differences between melon and cucumber regarding the mode of action of ethylene. Such effects will require further study. Finally, our project also generated and tested a set of novel genetic tools for finer identification of sex determining genes in the two species and for efficient breeding for these characters. Populations that will allow easier linkage analysis of candidate genes with each sex locus were developed. Moreover, effects of modifier genes on the major femaleness trait were resolved. QTL analysis of femaleness and related developmental traits was conducted, and a comprehensive set of Near Isogenic Lines that differ in specific QTLs were prepared and made available for the private and public research. Marker assisted selection (MAS) of femaleness and fruit yield components was directly compared with phenotypic selection in field trials, and the relative efficiency of MAS was demonstrated. Such level of genetic resolution and such advanced tools were not used before to study these traits, that act as primary yield components to determine economic yields of cucurbits. In addition, this project resulted in the establishment of workable transformation procedures in our laboratories and these can be further utilized to study the function of sex-related genes in detail.
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Maps showing distribution of zinc in heavy-mineral concentrates, Richfield 1° by 2° quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246k.
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Maps showing distribution of bismuth in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246e.
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Maps showing distribution of Arsenic in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246b.
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Maps showing distribution of barium in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246c.
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Maps showing distribution of copper in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246f.
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Maps showing distribution of lead in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246g.
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Maps showing distribution of thorium in heavy-mineral concentrates, Richfield 1 degree by 2 degrees Quadrangle, Utah. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1246h.
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