15,421 research outputs found

    Beyond and beneath the hierarchical market economy: global production and working-class conflict in Argentina's automobile industry

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    This paper argues that the hierarchical market economy (HME) category does not provide an adequate starting point for addressing capitalist diversity in Latin America. Building from a critical perspective on the global commodity chain (GCC) and global production network (GPN) approaches, it instead considers the impact of firms’ transnational relations and the often neglected role of working-class struggles. It will argue that capitalist diversity can only be understood at the nexus of these ostensibly global and local phenomena; and by specifying the strategic decisions taken by firms in Argentina’s automobile industry, it will account for the failure of that sector. Finally, it examines the role of working-class struggles in the industry in Córdoba, Argentina, arguing that these were vital in shaping the specific and unstable form of capitalist diversity in Argentina, as well as potential alternatives to it

    Selected aspects of lunar mare geology from Apollo orbital photography

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    Crater size-frequency distributions were studied (100-500 m) and are shown to provide significant integrated information concerning mare surface ages, subsurface stratigraphy, and surficial geology. Equilibrium cratering is discussed gradually reducing the relative numbers of craters smaller than 300-400 m in diameter as surfaces age and regolith thickens. Results for surface ages are in good agreement with other published crater ages. The existing correlations of large ring structures among various circular mare basins are shown to be based on criteria that are inconsistent and nonstandardized. A means of comparing equivalent ring structures in the different maria is proposed which takes into account the important characteristics of young unflooded basins (Orientale) as well as the progressive development of tectonic and volcanic features within the older flooded maria. Specific geologic aspects of several of the lunar maria are discussed and especially Mare Smythii, because of its great age and significantly different surface morphology. Lunar photographs and maps are shown

    Using case studies in management education: the student perspective.

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    Case studies are widely used in management education. Most of the literature discussing the case study method has reflected the perspective of the teacher, implying a teacher-centred view of the case study as a learning strategy. Little is known about the student perspective on case studies. If we are to use the case study method as a component of a student-centred learning experience, then we must know how students perceive case studies, and understand the differences in attitude towards case studies that are found between different groups within the student body. This paper reports on a study of 288 final-year undergraduate students at two UK higher education institutions and is designed to uncover their views about the case study method. All of the respondents were currently enrolled on a strategic marketing or strategic management module on which case studies were used as a key component of the teaching and learning strategy. In general, students believed case studies to be useful as a method of acquiring skills and knowledge. The inherent ambiguity of the complex case study, grounded in business realities, can cause anxiety among some students. There is evidence of marked differences in attitude towards case studies between students with different entry qualifications and with different ethnic backgrounds. Older students are found to have more favourable attitudes to case studies than younger students. These findings have practical implications for the effective use of the case study method. Lecturers using this approach need to be aware of the likely differences of attitude towards case studies of students in their class, and consider these when designing appropriate teaching and learning strategies

    Structural Analysis and Matrix Interpetive System /SAMIS/ program report Technical memorandum, Feb. 1963 - Dec. 1965

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    High speed digital computer program and data handling instructions for problem solving with structural analysis and interpretive syste

    Cooldown time for simple cryogenic pipelines

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    Cooldown time for simple cryogenic pipeline

    Flexible conformable hydrophobized surfaces for turbulent flow drag reduction

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    In recent years extensive work has been focused onto using superhydrophobic surfaces for drag reduction applications. Superhydrophobic surfaces retain a gas layer, called a plastron, when submerged underwater in the Cassie-Baxter state with water in contact with the tops of surface roughness features. In this state the plastron allows slip to occur across the surface which results in a drag reduction. In this work we report flexible and relatively large area superhydrophobic surfaces produced using two different methods: Large roughness features were created by electrodeposition on copper meshes; Small roughness features were created by embedding carbon nanoparticles (soot) into Polydimethylsiloxane (PDMS). Both samples were made into cylinders with a diameter under 12 mm. To characterize the samples, scanning electron microscope (SEM) images and confocal microscope images were taken. The confocal microscope images were taken with each sample submerged in water to show the extent of the plastron. The hydrophobized electrodeposited copper mesh cylinders showed drag reductions of up to 32% when comparing the superhydrophobic state with a wetted out state. The soot covered cylinders achieved a 30% drag reduction when comparing the superhydrophobic state to a plain cylinder. These results were obtained for turbulent flows with Reynolds numbers 10,000 to 32,500

    Breadboard linear array scan imager using LSI solid-state technology

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    The performance of large scale integration photodiode arrays in a linear array scan (pushbroom) breadboard was evaluated for application to multispectral remote sensing of the earth's resources. The technical approach, implementation, and test results of the program are described. Several self scanned linear array visible photodetector focal plane arrays were fabricated and evaluated in an optical bench configuration. A 1728-detector array operating in four bands (0.5 - 1.1 micrometer) was evaluated for noise, spectral response, dynamic range, crosstalk, MTF, noise equivalent irradiance, linearity, and image quality. Other results include image artifact data, temporal characteristics, radiometric accuracy, calibration experience, chip alignment, and array fabrication experience. Special studies and experimentation were included in long array fabrication and real-time image processing for low-cost ground stations, including the use of computer image processing. High quality images were produced and all objectives of the program were attained

    Pattern of physical activity can influence its efficacy on muscle and bone health in middle-aged men and women

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    Purpose This study aimed at investigating whether association between physical activity, and bone density and muscle strength depends on daily activity pattern.Methods Loading dose of moderate-to-vigorous physical activity (MVPA) was measured using accelerometer on 54 men (Mage = 54.1 years) and 59 women (Mage = 52.1 years). Pattern of MVPA was quantiied as number and length of MVPA bouts, and the length of break bouts between MVPA bouts. Knee extension torque (KET) and broadband ultrasound attenu-ation (BUA) of the calcaneus were also measured. Regression analysis was employed to examine the moderation efect of MVPA pattern.Results Loading dose had a larger efect on BUA (b = .002, p = .035) and KET (b = .004, p = .01) with the increase of median length of MVPA bout, but had a smaller efect on KET with the increase of maximal length of break bout (b = − .015, p = .024).Conclusions This study suggests that pattern of physical activity can inluence its eicacy on muscle and bone health
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