821 research outputs found
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Effect of Cilia Orientation in Metachronal Transport of Microparticles
A biomimetic approach is used to generate a directed transversal transportation of micron-sized particles in liquids based on the principle of cilia-type arrays in coordinated motion. Rows of flaps mimicking planar cilia are positioned off-centre along an array of cavities covered with membranes that support the flaps. These membranes are deflected from a concave to a convex shape and vice versa by pneumatic actuation applying positive and negative pressures (relative to the ambient) inside the cavities. As a result, the flap on top of the membrane tilts to the left or right within such a pressure cycle, performing a beat stroke. Since each cavity can be addressed in the device individually and in rapid succession, waves of coordinated flap motion can be run along the wall. Such metachronal waves are generated and transport of particles along the cilia surface is achieved in both symplectic and antiplectic direction. It is shown that the initial tilt of the flaps relative to the wall-normal determines the direction of transport
The Epigram of the Great Entablature of St. Polyeuktos and the Legacy of Anicia Juliana
This work examines the epigram of the Early Byzantine church of St. Polyeuktos, and the lineage of its patron, Anicia Juliana, in order to gain insight into the structure’s layout, decoration, and departure from architectural norms.
By utilizing the epigram as a guide, it examines the design and decoration of the church. Topics covered include aspects of the structure such as its design connections to the Temple of Jerusalem, the vine and peacock iconography of its great entablature, the presence or absence of a domed roof, and a baptismal mosaic of Constantine. It also touches upon related commissions that lay outside the confines of St. Polyeuktos, such as the Vienna Dios corides medical treatise, and churches, such as St. Euphemia, also constructed by the patron.
Anicia Juliana designed St. Polyeuktos to match the measurements of the Jerusalem Temple. Its distinct decorative program included imagery and an inscribed poem that made this theme clear. This study finds that the unique perspective of this female patron has not been fully explored. By reviewing the history of her female progenitors, it establishes the theory that the Anicia Juliana possessed personal knowledge that prompted her to custom design St. Polyeuktos in hope of it someday housing the Temple treasure.
Although the interior location of the first half of the inscribed epigram has been firmly established within the nave of the St. Polyeuktos, the location of its second half remains a mystery. Sculptural fragments from its great entablature, bearing lines from the epigram, were accidentally unearthed in the quarter of Sarashane, Istanbul. A copy of the epigram, found in a tenth-century manuscript from the Palatine Anthology, AP 1.10, played a crucial role in identifying the church. This study examines the glosses, tie marks and signes-de-renvoi that surround the poem’s text, in an effort to establish the layout of the second half of the epigram for the exterior compound of the church
Communication in Collective Choice Environments
In this dissertation, I present three models of communication in collective choice environments. The first two models demonstrate how collective choice procedures provide opportunities for informed communicators to manipulate outcomes by strategically obfuscating information to appeal to different coalitions at different times. Paradoxically, the members of the collective choice institution are often better off gathering no information at all rather than relying on an expert who manipulates outcomes in this way. The final chapter characterizes the incentives of candidates to reveal information about their preferences to voters in an election when multiple policy issues are at stake. I show that candidates can credibly reveal directional information about their preferences but will leave the voters uncertain about which candidate is more extreme
Review of technology available to the underground mining industry for control of diesel emissions
"This report reviews the performance and applicability of technology for the control of emissions from diesel-powered equipment used in underground coal and metal/nonmetal mines. The methods discussed include Mine Safety and Health Administration-approved low-emission engines, engine derating, fuels, fuel additives, diesel oxidation catalysts, and diesel particulate filters. The potential of each of these technologies is examined individually and in combination. The performance estimates are derived from the published literature and presented in narrative and tabular form. The purpose of this report is to help the mining industry select the most appropriate method to reduce underground exposures of miners to diesel exhaust in the context of the recently developed diesel regulations. It is important to note that the control technologies discussed in this report have received limited evaluation in underground mines. Additional research is ongoing, and some engineering design changes may need to be implemented before all of these diesel emission control technologies can be safely and successfully used in underground mines." - NIOSHTIC-2by George H. Schnakenberg and Aleksandar D. Bugarski."August 2002."Also available via the World Wide Web.Includes bibliographical references (p. 42-47)
Measuring Mutual Dependence Between State Repressive Actions
This study explores the relationships between state violations of different human rights. Though most quantitative studies in international relations treat different types of repressive behaviors as either independent or arising from the same underlying process, significant insights are gained by conceptualizing different human rights violations as separate but dependent processes. We present a theoretical framework for conceptualizing the mechanisms relating human rights practices and produce a novel measurement strategy based on network analysis for exploring these relationships. We illustrate high levels of complementarity between most human rights practices. Substitution effects, in contrast, are occasionally substantial but relatively rare. Finally, using empirically informed Monte Carlo analyses, we present predictions regarding likely sequences of rights violations resulting in extreme violations of different physical integrity rights
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Pneumatically actuated biomimetic particle transporter
To prevent the adhesion of particles at surfaces by transporting them along the surface, a new type of pneumatically actuated particle transporter is introduced. The biomimetic approach is based on the transportation principle of particles by cilia arrays due to the generation of metachronal waves. Rows of flaps, which mimic the cilia, are asymmetrically positioned on flexible membranes. The membranes are individually deflected by applying a well-defined pressure profile to achieve a metachronal wave.
Detailed simulations of the membrane and flap deflections as well as a description of the proof-of-concept by applying metachronal waves to the flap arrays are presented
Plant growth regulators for cotton (1994)
Several new plant growth regulators have come on the market for use in cotton in recent years. These plant growth regulators have given growers a new opportunity to influence cotton growth to their advantage. However, this opportunity goes only as far as the ability of the grower to understand and use them properly.David W. Albers (State Extension Specialist-Cotton, Delta Center), C. Tim Schnakenberg (Mississippi County)New March 1994Includes bibliographical reference
Fescue seed and forage planning budget
Using this planning budget, farmers growing fescue for seed and forage can estimate their costs and returns for 2024. Table 1 presents estimates for established fescue used for seed, hay and grazing purposes. Assumptions were based on price forecasts as of October 2023. Detailed prices and practices are summarized in Tables 2 and 3. The production practices used to develop these cost estimates are common on Missouri farms. Use the “Your estimate” column to plan your operation’s costs and returns for 2024.Written by Ryan Milhollin (Assistant Extension Professor, Agricultural Business and Policy), Drew Kientzy (Research Analyst, Agricultural Business and Policy), C. Tim Schnakenberg (Field Specialist in Agronomy)New 10/2018; Revised 10/202
Alfalfa small bales planning budget
Using this planning budget, farmers growing alfalfa can estimate their costs and returns associated with producing small square bales in 2024. Establishment costs for alfalfa can be found in MU Extension publication G661, Alfalfa Establishment Planning Budget (extension.missouri.edu/g661). Table 1 presents estimates for established Roundup Ready [trademark symbol] alfalfa with small bale production. Assumptions were based on price forecasts as of October 2023. Detailed prices and practices are summarized in Tables 2 and 3. The production practices used to develop these cost estimates are common on Missouri farms. Farmers are encouraged to modify this budget based on their circumstances. For example, an alfalfa large round bale planning budget could be developed by modifying machinery activities and hay sales. Use the “Your estimate” column to plan your operation’s costs and returns for 2024.Written by Ryan Milhollin (Assistant Extension Professor, Agricultural Business and Policy), Drew Kientzy (Research Analyst, Agricultural Business and Policy), C. Tim Schnakenberg (Field Specialist in Agronomy)New 10/2018; Revised 10/202
Corn silage planning budget
Using this planning budget, farmers growing corn silage can estimate their costs and returns for 2024. Table 1 presents estimates for corn silage production in Missouri. Assumptions were based on price forecasts as of October 2023. Detailed prices and practices are summarized in Tables 2 and 3. The production practices used to develop these cost estimates are common on Missouri farms. Use the “Your estimate” column to plan your operation’s costs and returns for 2024.Written by Ryan Milhollin (Assistant Extension Professor, Agricultural Business and Policy), Drew Kientzy (Research Analyst, Agricultural Business and Policy), C. Tim Schnakenberg (Field Specialist in Agronomy)New 10/2018; Revised 10/202
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