5,457 research outputs found
T.J. Stiles: “The Commodore’s Patriotism: Cornelius Vanderbilt’s Path to the Founding of Vanderbilt University”
No full textIncludes descriptive metadata provided by producer in MP4 file: "Chancellor's Lecture Series - Videos - T.J. Stiles: 'The Commodore’s Patriotism: Cornelius Vanderbilt’s Path to the Founding of Vanderbilt University'." By Vanderbilt University. T.J. Stiles, Pulitzer Prize-winning author and historian, speaks Sept. 29, 2010 as part of the Chancellor's Lecture Series. Stiles wrote the 2009 biography The First Tycoon: The Epic Life of Cornelius Vanderbilt. Chancellor Nicholas Zeppos introduces Stiles. Stiles takes questions after his lecture
Cwbr Author Interview: Custer\u27s Trials: A Life On The Frontier Of A New America
No full textInterview with T.J. Stiles, author of Custer\u27s Trials: A Life on the Frontier of a New America Interviewed by Tom Barber
Civil War Book Review (CWBR): The Civil War Book Review is pleased to speak with T.J. Stiles, winner of multiple awards for biography and author of Jesse James: Last Rebel of the Civil War and The First Tycoon: The Epic Life of Cornelius Vanderbilt. Today we get to discuss his most recent work Custer\u27s Trials: A Life on the Frontier of a New America. Mr. Stiles, thank you for joining us today. T.J. Stiles: Thanks very much for interviewing me...
Commerce Street at Night, Montgomery, Alabama
No full textColorized print of Commerce Street in Montgomery, AL. A moon lit city street with lighted buildings. Railroad car tracks, horses, wagons and Model-A cars line the street. A sign written in lights 'Montgomery (key symbol) your opportunity' at end of street. Date written on card was February 23, 1915. Divided back postcard.Printed on front: 'Commerce Street and 'slogan' sign by Night, Montgomery, Ala'. Printed on back: 'Published by T.J. Mattox Cigar & Tobacco Co., Montgomery, Ala., Made in U.S.A.', 'CT Co. Chicago', 'A-14946', 'C.T. Photochrom.'Written on back: 'Love Andrews, Feb 23, 1915'
Biomimetic systems
No full textSo far in this volume we have considered the nature of living things and some of their key building blocks and capabilities. This has set the stage for the current section and the next where we will describe some exemplar integrated biomimetic and biohybrid systems—living machines. To place these contributions in some additional context this introduction briefly reviews the history of life and of its variety, noting some of the critical branching points in the phylogenetic tree, identifying some of the organisms that have been the focus of research on biomimetic systems, and exploring why they might be seen to be important or pivotal. We begin with the first replicators, then consider bacterial colonies, the emergence of multicellularity and of bilateral symmetry, and conclude with a brief discussion of biomimetics applied to vertebrate brain and body plans including those of humans
Erosion-corrosion resistance of engineering materials in various test conditions
No full textErosion–corrosion is a complex phenomenon which involves the interaction between the mechanical processes of solid particle erosion and the electrochemical processes of corrosion. A whole range of issues is faced by a designer when trying to obtain relevant information on erosion–corrosion performance of a material. Amongst the constraints are the dispersed test conditions and test rigs available in the literature making comparisons and quantifying erosion–corrosion wear rates of different materials very difficult. The aim of this work is to evaluate the repeatability of erosion–corrosion experiments and to investigate the role of different parameters influencing erosion–corrosion. The materials tested in this work are stainless steel (SS316L/UNS S31603), carbon steel (AISI 1020/UNS G10200) and nickel-aluminium bronze (NAB/UNS C63200). A slurry pot erosion tester was used as the test apparatus and test parameters such as erodent size, erodent concentration, flow velocity and test solutions were varied to study their effect on erosion–corrosion. SEM analysis showed that a similar erosion–corrosion mechanism is seen for SS316L and NAB with formation of multiple extruded lips and platelets typically seen for erosion dominated material. In contrast the surface of AISI 1020 revealed the formation of craters, pits and shallow indentations which suggests that corrosion mechanism has a dominant influence on the material. Error rates in tests were found to have an average of 5.5% which are relatively low indicating good repeatability of test measurements and data from the test rig. The erosion–corrosion resistance of AISI 1020, SS316L and NAB were compared and it was found that SS316L showed the lowest erosion–corrosion mass loss rates in all test conditions followed by NAB and then AISI 1020. However in terms of synergistic ranking, NAB showed the best resistance to the combined action of erosion and corrosion with the highest negative synergy value. Positive synergy was evident for AISI 1020 in 3.5% NaCl and SS316L in 0.3 M HCl. A wear map is presented to evaluate erosion–corrosion trends of the materials. This work combines the assessment of test repeatability, variation in test conditions and comparison of material performance which are key stages in a material selection process
A Living Machines approach to the sciences of mind and brain
No full textHow do the sciences of mind and brain—neuroscience, psychology, cognitive science, and artificial intelligence (AI)—stand in relation to each other in the 21st century? This chapter proposes that despite our knowledge expanding at ever-accelerating rates, our understanding of the relationship between mind and brain is, in some important sense, becoming less and less. An increasing explanatory gap can only be bridged by a multi-tiered and integrated theoretical framework that recognizes the value of developing explanations at different levels, combining these into cross-level integrated theories, and directly contributing to new technologies that improve the human condition. Development of technologies that instantiate principles gleaned from the study of the mind and brain, or biomimetic technologies, is a key part of the validation process for scientific theories of mind and brain. We call this strategy for the integration of science and engineering a Living Machines approach. Following this path can lead not only to better science, and useful engineering, but also a richer view of human experience and of relationships between science, engineering, and art
Fredericksz transition threshold in nematic liquid crystals filled with ferroelectric nano-particles
No full textA key liquid crystalline property for electro-optic applications is the Frederiks threshold electric field. There has been recent experimental interest in liquid crystal-based colloidal suspensions in which the colloidal nanoparticles both possess a permanent electric polarization and provide strong director anchoring on the particle surface. Such suspensions are sometimes known as Filled Liquid Crystals. Our calculations suggest, in qualitative agreement with experiment, that filling the nematic liquid crystal with ferroelectric nanoparticles can significantly decrease the electric Frederiks transition threshold field
Assessment of industrial electrostatic hazards using finite-element electric field analysis
No full textCharged clouds, generated in industrial processes, can lead to large values of space potential and electric field inside a vessel. Isolated masses of airborne liquid within can carry induced charge to the wall resulting in electrostatic discharges. Critical values of space potential can be found using a relationship between the jet safety factor and the material hazard coefficient. A computer package is described which allows complex space potential profiles and electric fields to be modelled for a prescribed space charge density. This allows the central space potential, a key indicator of electrostatic risk, to be evaluated. Examples are presented of two recent hazard investigations made by Wolfson Electrostatics
Flow patterns around longitudinal training dams
No full textWith the intention to reduce the negative effects of ongoing bed erosion, as well as to improve several other river functions such as protection against floods, provision of safe and efficient navigation and ecology, a ‘pilot project longitudinal training dams’ was initiated. The training dams have recently been implemented in the Waal between Tiel and Sind Andries. In this project, river groynes have been completely removed and replaced by dams that lie parallel to the river bank. With help of the longitudinal training dams, a two-channel river system is created in which the river is divided into a main and side channel. The dams are placed in a continuous manner with openings in between that are relatively small compared to the dam length. At the beginning and end of the dam an inlet and outlet region is situated, as shown in Fig. 1. The combination of inlet and openings allows for water and sediment to be divided between the main and the side channel. Both inlet and openings are constructed with the help of a porous rock-layer. The crest heights can be altered by adding or removing stones. This is expected to influence the amount of water and sediment entering the side channel and can therefore be used as a regulation tool. A.J.F. Hoitink, T.V. de Ruijsscher, T.J. Geertsema, B. Makaske, J. Wallinga, J.H.J. Candel, J. Poelman (Eds.) NCR days 2017, Febr. 1-3, 2017. Book of abstracts, NCR publication 41-2017.Rivers, Ports, Waterways and Dredging EngineeringHydraulic Structures and Flood RiskEnvironmental Fluid Mechanic
Can locker box logistics enable more human-centric medical supply chains?
No full textThere are a range of non-clinical support services within hospitals, such as catering, linen / laundry and supply logistics, which are widely considered to have a significant effect on the delivery and quality of patient care. Supply chain activities are regarded as one of the most important owing to the potentially fatal consequences of ‘stock-outs’ (Özkil et al. 2009; Costantino et al. 2010) where key inventory becomes temporarily unavailable. As a result, hospitals typically employ inventory buffers but in spite of such practices, stock-outs still occur due to disparities in inventory requirements between the hospital and suppliers; the presence of unusual demand for specific items (Jarret 2006); and, receipt of goods which are faulty, contaminated or otherwise unfit for purpose. In such events, the supply chain needs to be agile, responding quickly in order to cater for demand. However, due to the structure of the healthcare supply chain which consists of an external chain (delivering goods to the hospital) and internal hospital chain (distributing delivered goods to end users throughout the hospital), the fast flow of goods is often stalled by the interface between the two (Aronsson et al. 2011).This paper critically assesses the current supply chain practices implemented at Great Ormond Street Hospital (GOSH) NHS Trust in London in relation to those that could be utilised, whilst presenting a new concept of supply for key lines and items to the trust using unattended electronic locker boxes to create a more individualistic human-centric service for users, with the overall aim of improving the speed of the distribution of goods both internally (between players once inventory has arrived at the hospital) and externally (for inventory being delivered into the hospital from outside)
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