796 research outputs found
Robert L. Irish, approximately 1885-1889
No full textCabinet card photograph of a Norwich University student tentatively identified as Robert L. Irish, Class of 1889, in his cadet uniform, approximately 1880-1900
Guest Speaker Dr. Robert L. Owens III, 1972 Black History Week
No full textDr. Robert L. Owens III, Dean of the College of Liberal Arts at Howard University, visited Jacksonville State University to speak during the observance of Black History Week. Shown from left are Dr. Robert L. Owens III, Dr. Reuben Boozer, Dr. Jerry Wilson, Dr. Donald Patterson, and Dr. Alen Smith.https://digitalcommons.jsu.edu/lib-ac-histimg/43962/thumbnail.jp
Redistributive Politics and Market Efficiency: An Experimental Study
No full textWe study the interaction between competitive markets that produce large but unequally distributed welfare gains and elections through which the poor majority can redistribute income away from the rich minority. In our simple laboratory democracy, subjects first earn their income by trading in a double auction market and thereafter vote on redistributive policies in two-candidate elections. In addition, in one of the treatments subjects can attempt to influence the candidates’ policy choices by transferring money to them. We observe very high levels of redistribution – even when transfers to candidates are possible – with little effect on market efficiency. Overall, the experimental results are explained by our equilibrium predictions.redistribution, double auction, elections, lobbying
Justifying patents: a critique of the deontological approach
No full textThis thesis assesses philosophical arguments in favour of patent systems. These come in both consequentialist and deontological forms, the latter of which are the focus of this analysis. One kind of deontological argument is based on the concept of desert. I argue that on any plausible conception of desert, the patent system fails to distribute rewards as well as viable alternative systems could. The other kind of deontological argument claims that inventors are entitled to patent rights over their inventions as an extension of their natural rights, drawing on a Lockean account of the conditions of legitimate appropriation of unowned goods. After a discussion of the metaphysics of invention, and of the nature of the commons, I argue that Locke's conditions are not in fact always trivially satisfied in the case of patents. Furthermore, entitlement-based arguments conclude that because new inventions are unowned, claiming property rights in them involves only the same moral considerations that would apply in the state of nature. I argue that because we are not in the state of nature, pre-existing property rights also need to be taken into account, which conflict with patents. The broad conclusion of this thesis is that none of the plausible deontological arguments for patent systems are sound. The implication is that any justification of must therefore be made in consequentialist terms; this ultimately rests on strong empirical evidence rather than normative arguments alone
Sexuality and nature in Robert Frost's Lyrics
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Comunicação e ExpressãoEste trabalho se propõe a analisar a presença da sexualidade humana na lírica de Robert Frost, através do estudo de vinte e três poemas sobre natureza. Tomando por base teórica o método proposto pelo semiótico francês Michael Riffaterre no livro Semiotics of Poetry (1980), este estudo analisa o jogo da linguagem que, ao mesmo tempo que estes poemas líricos parecem recriar o real-natureza, apresentam também o tema do erotismo no nível semiótico da linguagem
A quantitative assessment of nanometric machinability of major polytypes of single crystal silicon carbide
No full textThe influence of polymorphism on nanometric machinability of single crystal silicon carbide (SiC) has been investigated through molecular dynamics (MD) simulation. The simulation results are compared with silicon as a reference material.
Cutting hardness was adopted as a quantifier of the machinability of the polytypes of single crystal SiC. 3C-SiC offered highest cutting resistance (∼2.9 times that of silicon) followed by the 4H-SiC (∼2.8 times that of silicon) whereas 6H-SiC (∼2.1 times that of silicon) showed the least. Despite its high cutting resistance, 4H-SiC showed the minimum sub-surface crystal lattice deformed layer depth, in contrast to 6H-SiC. Further analysis of temperatures in the cutting zone and the percentage tool wear indicated that single point diamond turning (SPDT) of single crystal SiC could be limited to either 6H-SiC or 4H-SiC depending upon quality and cost considerations as these were found to be more responsive and amenable to SPDT compared to single crystal 3C-SiC
Guidelines for the prevention of tuberculosis in health care facilities in resource-limited settings
No full textWriting committee: Reuben Granich, Nancy J. Binkin, William R. Jarvis and Patricia M. Simone, Centers for Disease Control and Prevention, Atlanta, United States of America; Hans L. Rieder, International Union Against Tuberculosis and Lung Disease, Paris, France; Marcos A. Espinal and Jacob Kumaresan, Communicable Diseases Programme, World Health Organization, Geneva, SwitzerlandIncludes bibliographical references
Minnesota Synod Convention Banquet of 1965
No full textThis image shows the 1965 Minnesota Synod Convention Banquet. (l-r): Robert Slater, Reuben Youngdahl, Franklin Clark Fry (at microphone) Leonard, Gerda, Mary, John, David, Peter, and Joanne Kendal
Brittle–ductile transition during diamond turning of single crystal silicon carbide
No full textIn this experimental study, diamond turning of single crystal 6H-SiC was performed at a cutting speed of 1 m/s on an ultra-precision diamond turning machine (Moore Nanotech 350 UPL) to elucidate the microscopic origin of ductile-regime machining. Distilled water (pH value 7) was used as a preferred coolant during the course of machining in order to improve the tribological performance. A high magnification scanning electron microscope (SEM FIB- FEI Quanta 3D FEG) was used to examine the cutting tool before and after the machining. A surface finish of Ra=9.2 nm, better than any previously reported value on SiC was obtained. Also, tremendously high cutting resistance was offered by SiC resulting in the observation of significant wear marks on the cutting tool just after 1 km of cutting length. It was found out through a DXR Raman microscope that similar to other classical brittle materials (silicon, germanium, etc.) an occurrence of brittle-ductile transition is responsible for the ductile-regime machining of 6H-SiC. It has also been demonstrated that the structural phase transformations associated with the diamond turning of brittle materials which are normally considered as a prerequisite to ductile-regime machining, may not be observed during ductile-regime machining of polycrystalline materials
A Finite Element approach to understanding constitutive elasto-plastic, visco-plastic behaviour in lead free micro-electronic BGA structures
No full textThis work investigates the non-linear elasto-plastic and visco-plastic behaviour of lead free solder material and soldered joints. Specifically, Finite Element (FE) tools were used to better understand the deformations within Ball Grid Array solder joints (BGA), and numerical and analytical methods were developed to quantify the identified constituent deformations. FE material models were based on the same empirical constitutive models (elastic, plastic and creep) used in analytical calculations. The current work recognises the large number of factors influencing material behaviour which has led to a wide range of published material properties for near eutectic SnAgCu alloys.
The work discovered that the deformation within the BGA was more complex than is generally assumed in the literature. It was shown that shear deformation of the solder ball could account for less than 5% of total measured displacement in BGA samples. Shear displacement and rotation of the solder balls relative to the substrate are sensitive to the substrate orthotropic properties and substrate geometry (relative to solder volume and array pattern). The FE modelling was used to derive orthotropic FR4 properties independently using published data. An elastic modulus for Sn3.8Ag0.7Cu was measured using homologous temperatures below 0.3. Suggested values of Abaqus-specific creep parameters m and f (not found in literature) for Sn3.8Ag0.7Cu have been validated with published data.
Basic verification against simple analytical calculations has given a better understanding of the components of overall specimen displacement that is normally missing from empirical validation alone. A combined approach of numerical and analytical modelling of BGAs, and mechanical tests, is recommended to harmonise published work, exploit new material data and for more informed analysis of new configurationsEPSRC-funded PhD studentshi
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