12,256 research outputs found
Howard University Players on TV 2
No full textSubcategory: Education - Univesitites and Colleges; Pulitzer Prize winning author and Poet Laureate, Toni Morrison, Acts Out a Scene with the Howard Players at Howard Universityhttps://dh.howard.edu/pittcourier_eduuni/1018/thumbnail.jp
COOK, George
No full textTitle: Papers, 1855-1931 Description: .5 linear ft.
Notes: Author, educator. Includes correspondence, manuscripts, addresses, biographical sketches, memorials, photographs, a scrapbook and a song composed by William Weston Patton, President of Howard University. Gift, 1958.
Subjects: Business; Education; Washington (DC). Childers, Lulu V. Du Bois, W. E. B. (William Edward Burghardt), 1868-1963; As correspondent Funeral rites and ceremonies; Cook, George William Howard University; Administration Howard University; Faculty; Cook, George William Howard University; Presidents; Patton, William Weston Howard University; Students; Cook, George William Howard University, Washington (DC); Faculty members\u27 papers Howard University, Washington (DC); School of Commerce and Finance Patton, William Weston Roosevelt, Theodore, 1858-1919; As correspondent Spingarn, J. E. (Joel Elias), 1875-1939 Tunnell, W. V. White, Walter F. (Walter Francis), 1893-1955; As correspondent Wilkinson, F. D. Woodson, Carter G. (Carter Godwin), 1875-1950
Location: Howard University, Moorland-Spingarn Research Center (Washington, DC) NIDS Fiche #: 4.72.22 NUCMC Number: MS 83-122
Out-of-equilibrium Soft Matter
No full textThe term active fluids refers to motions that are created by transforming energy from the surroundings into directed motion. There are many examples, both natural and synthetic, including individual swimming bacteria or motile cells, drops and bubbles that move owing to surface stresses (so-called Marangoni motions), and chemical- or optical-driven colloids. Investigations into active fluids provide new insights into non-equilibrium systems, have the potential for novel applications, and open new directions in physics, chemistry, biology and engineering. This book provides an expert introduction to active fluids systems, covering simple to complex environments. It explains the interplay of chemical processes and hydrodynamics, including the roles of mechanical and rheological properties across active fluids, with reference to experiments, theory, and simulations. These concepts are discussed for a variety of scenarios, such as the trajectories of microswimmers, cell crawling and fluid stirring, and apply to collective behaviours of dense suspensions and active gels. Emerging avenues of research are highlighted, ranging from the role of active processes for biological functions to programmable active materials, showcasing the exciting potential of this rapidly-evolving research field
Tacit knowledge, learning and expertise in dry stone walling
No full textThis is a detailed study of learning in the context of dry stone walling. It examines
what happens in the learning situation. The aim of this work was:
'To understand the nature of expertise in dry stone walling, how it is understood
by those practising the craft, and how it is transmitted to others'.
The main research questions were, therefore:
What happens when dry stone wallers are learning their craft?
How do they acquire expertise in dry stone walling?
How is this learning communicated?
This process necessitated developing a way of engaging with the practitioners,
eliciting descriptive data about what they were doing, and why they were doing it,
through interviews (or conversations) with both individuals and groups, whilst
they practiced their skill. Twenty three wailers were interviewed as they worked,
building walls.
The material obtained was analysed under seven different themes:
'Knowing how'
The use of tacit knowledge or intuition
'Flow'
Constant decision making, reflection and learning from mistakes
Individual and subjective variations and experiences
The relevance of emotion
The use of 'rules of thumb' or maxims.
Learning walling does not fit simply into any of the seven themes. It is
contextualised, complex and individual. It demonstrates tacit knowledge and
intuition. It involves emotion, sometimes consciously, sometimes not. It involves
memory, problem solving, and learning from mistakes, and reflection. Maxims or
'rules of thumb' were a key element in the learning process at all stages. Linear
stages of learning were not evidenced. Deep understanding of the practice is
evidenced, and the wider learning and teaching implications are explored
Nigger - NI\u27G-IR,- or NIG-IR\u27O is writing
No full textA confusing exposition on the origin of writing in two chapters submitted to Howard University, Washington, D.C., 1938. 21 p. 25 cm Holograph. Author unknown.https://dh.howard.edu/og_hu/1006/thumbnail.jp
LOGAN, Rayford W.
No full textTitle: Papers, 1917-1980s Description: 44 linear ft.
Notes: Afro-American historian, administrator, author, civil rights activist, and Howard University faculty member. Personal and family papers, teaching materials, correspondence, travel documents, speeches, writings and book reviews, organizational files, subject files, printed materials, photographs, memorabilia, and audiotapes and films, relating to Logan\u27s activities as a scholar and advocate of human rights. Includes materials relating to his association with Alpha Phi Alpha, Howard University, the Peace Corps, and Unesco, and to the preparation of the Dictionary of American Negro Biography (1982). Dictionary of American Negro Biography files restricted. Gift of Michael Winston, 1983.
Subjects: Afro-American authors -- Washington (DC) lcsh Afro-American college teachers -- Washington (DC) lcsh Afro-American historians -- Washington (DC) lcsh Afro-Americans -- Civil rights. Alpha Phi Alpha Fraternity. Human rights workers -- Washington (DC) lcsh Human rights advocacy. Howard University -- Faculty. Peace Corps (US) Unesco.
Location: Howard University, Moorland-Spingarn Research Center (Washington, DC) NUCMC #: DCLV96-A94
Flow-induced gelation of microfiber suspensions
No full textThe flow behavior of fiber suspensions has been studied extensively, especially in the limit of dilute concentrations and rigid fibers;
at the other extreme, however, where the suspensions are concentrated and the fibers are highly flexible, much less is understood
about the flow properties.We use a microfluidic method to produce uniform concentrated suspensions of high aspect ratio, flexible
microfibers, and we demonstrate the shear thickening and gelling behavior of such microfiber suspensions, which, to the best of our
knowledge, has not been reported previously. By rheological means, we show that flowing the suspension triggers the irreversible
formation of topological entanglements of the fibers resulting in an entangled water-filled network. This phenomenon suggests
that flexible fiber suspensions can be exploited to produce a new family of flow-induced gelledmaterials, such as porous hydrogels. A
significant consequence of these flow properties is that the microfiber suspension is injectable through a needle, from which it can be
extruded directly as a hydrogel without any chemical reactions or further treatments. Additionally, we show that this fiber hydrogel is
a soft, viscoelastic, yield-stress material
Thermochemical hydrogen production from the sulphur-iodine cycle powered by solar or nuclear sources
No full textSince mankind's adoption of fossil fuels as its primary energy carrier for heating, elec-
tricity and transportation, the release of greenhouse gases into the atmosphere has
increased constantly . A potential replacement energy carrier is hydrogen. Current
industrial techniques for dissociating hydrogen from its common substances are con-
ventionally reliant on fossil fuels and thus greenhouse gases are still released. As a
mechanism to develop a hydrogen economy current industrial techniques will suffice;
however, a long-term sustainable solution to hydrogen mass production that does not
release greenhouses gases is desired. The United States of America Government be-
lieves that the Sulphur-Iodine thermochemical hydrogen production cycle, thermally
powered by a nuclear source, is the most likely long-term solution. A critical part
of the Sulphur-Iodine cycle is the point of interaction between the thermal source
and sulphuric acid used within the cycle. A novel bayonet heat exchanger made
from silicon carbide is theoretically applied to the point of interaction. Through a
combination of experiments and theoretical modelling, the bayonet heat exchanger is
characterised. The bayonet model is then modified to simulate the intended nuclear
reactor favoured by the United States Department of Energy. In addition, the bayo-
net heat exchanger is analysed for a solar thermal application. An advanced design
of the bayonet is also presented and theoretically analysed for its increased thermal
efficiency
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