4,657 research outputs found
[Taliaferro Preston Shaffner, full-length portrait, three-quarters to the right, head front, standing, holding a tall hat. On the left is a chair and on the right a small table covered with tablecloth]
No full textInventor, associate in the introduction of the telegraph and north Atlantic cable; telegraph company official; author and historian.Scratched on face of plate: Schaffner. Scratched on back of plate: 244.Identification from an engraving by J.C. Buttre for Shaffner's Telegraph Manual.Original served by appointment only.Produced by Mathew Brady's studio.Transfer; U.S. War College; 1920. (DLC/PP-1920:46153).Forms part of: Daguerreotype collection (Library of Congress)
J.C. Steyn Collection index
No full textThis index describes the J. C. Steyn collection which includes background material for 3 biographies by J.C. (Jaap) Steyn namely N.P. van Wyk Louw, P.J. Cillié and MER (M.E. Rothman). Prof. J.C. Steyn (1939-) is an educationist, linguist and author. Correspondence ; clippings ; photographs ; book reviews ; articles ; speeches ; varia compiled in 23 pamphlet boxes
[Thomas Starr King, half-length portrait, three-quarters to right, eyes front, with one hand in coat]
No full textUnitarian pastor, statesman, author.Identification from engraving in J.C. Buttre's American Portrait Gallery, 1877, v.1, [p. 61]Scratched on back of plate: 142; Rev. Thos. Starr King.Original served by appointment only.Produced by Mathew Brady's studio.Transfer; U.S. War College; 1920. (DLC/PP-1920:46153).Forms part of: Daguerreotype collection (Library of Congress)
Product Innovation Knowledge Transfer for Developing Countries: Towards a systematic Transfer Approach
No full textThe transfer of knowledge on product innovation to small- and medium-sized enterprises and local knowledge institutions in developing countries is expected to be one of the key drivers for competiveness and economical growth, and a part of the solution to environmental and social challenge. In that respect, this PhD study focuses on how the process of the current knowledge transfer takes place and how it can be improved. A combination of literature review and empirical research has resulted into a conceptual framework to describe the complex and dynamic process of product innovation knowledge transfer to developing countries. In order to improve this process, a systematic approach has been developed and operationalized by a needs assessment tool and a design manual: The UNEP Design for Sustainability for Developing Economies (D4S-DE) Manual (www.d4s-de.org). Both tools have been tested in practice by practitioners and have been evaluated by an academic review board.Design EngineeringIndustrial Design Engineerin
[Azariah C. Flagg, half-length portrait, three-quarters to the left]
No full textEditor of the Plattsburg, N.Y. Republican; financial advisor to the N.Y. state Democratic party; comptroller of N.Y. state and New York City.Identification from engraving by J.C. Buttre after a different daguerreotype by Brady, United States Review, August, 1855, opp. p. 7.Scratched on back of plate: 230. Written in ink on back of plate: A.C. Flagg.Original served by appointment only.Produced by Mathew Brady's studio.Transfer; U.S. War College; 1920; (DLC/PP-1920:46153).Forms part of: Daguerreotype collection (Library of Congress)
Where do we draw lines: professional relationship boundaries and the child and youth care practitioner
No full textThe question of professional relationship boundaries is a poignant one, in light of the many boundary grey-zones that are created by the variety of young people’s needs, practice settings and professional relationship contexts within the field of child and youth care. In order to support practitioners’ development of critical thought and awareness of professional boundaries, this paper applies a professional relationship boundaries conceptual framework to child and youth care work, and the literature is consulted to explore the impacts of boundary violations, influences on individual’s boundaries, cues to indicate blurring boundaries, and key strategies to maintain balanced boundaries
Anthropometry of the Beaver, Sekani, and Carrier Indians:
No full textby J.C. Boileau GrantBulletin (National Museum of Canada) ; 81. Bulletin (National Museum of Canada). Anthropological series. ; 18
J.C. Painter letter to Benjamin Lundy
No full textLetter from J.E. Painter to (presumably) Benjamin Lundy, answering a request for information about the history and operations of the Underground Railroad. Letter includes details of a story of an ex-slave transported on the Underground Railroad through Ohio and stories of the plight of other fugitive slaves crossing the Ohio River.
Benjamin Lundy (1789-1839) was a prominent Quaker abolitionist best known for his development of abolitionist periodicals. His "Genius of Universal Emancipation" was first published in 1821 from his home in Mt. Pleasant, Ohio, and enjoyed a wide circulation across the antebellum United States. In the 1820s, the young William Lloyd Garrison came to work for The Genius. Benjamin Lundy traveled widely seeking subscriptions to The Genius, giving talks about the anti-slavery movement, and observing and documenting the conditions of enslaved people across the Americas. He was also involved in the establishment of freed slave colonies in Mexico
Morphodynamic modeling and morphological upscaling in a fine sediment system
No full textSediment mobility and memory effects distinguish transport and morphodynamics in fine sediment settings from sandy settings. This paper focuses on the morphodynamic modeling of fine sediment systems, and an adaptation of modeling procedures more commonly used in sand-dominated systems. An extensive dataset of short-term transport and morphological trends along with ancillary data is used to support the development, parameterization, and calibration of a morphodynamic model of the Lower Passaic River (USA). The model is subsequently extended to include a morphological acceleration procedure in order to enable computationally efficient morphodynamic simulations. The performance of the resulting model is first verified and subsequently validated using measured decadal-scale morphological change. Subsequently, the model is used to assess the current morphodynamic status and the long-term response of the river to forcings such as shipping, episodic storm events, and climate change, with results that are consistent with theoretical expectations.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Fluid Mechanic
Transport and Morphodynamics in a Fine Sediment Estuary: From Conceptual Understanding to Numerical Modeling
No full textThis dissertation presents a study of fine sediment transport and morphodynamics in estuarine settings using data from the Lower Passaic River (LPR), located in New Jersey, USA. Originally a relatively shallow system, it has been dredged and deepened for navigation purposes from the late-1800s onwards, along with other modifications such as wetland reclamation, shoreline armoring, construction of bridges, etc. The last such dredging occurred several decades ago, and although the subsequent long-term morphological trend has been one of infilling, morphological trends over the short term (inter-annual durations) are more variable, with some years experiencing erosion and others experiencing infilling. Therefore, this dissertation seeks to understand the processes driving the long- and short-term morphological trends and the processes controlling the long-term morphodynamic equilibrium of the estuary. The dissertation approaches this problem by first assessing the small-scale (spatial and temporal) transport processes responsible for morphological evolution over the short term. Subsequently, it assesses the large-scale system dynamics from a morphodynamic perspective and the processes driving the variations thereof. Finally, the information gained from the small- and large-scale assessments is used to support the development and application of a morphodynamic model.Sediment transport, and consequently morphodynamics, in starved-bed or erosion-limited fine sediment systems is a non-equilibrium process related to the availability of mobile sediment. This defines one time-scale of transport in such systems, that of the tidal period. During such conditions, transport is associated with the dynamics of a thin layer (2-4 mm thick in the LPR) of easily-erodible surficial sediments termed the fluff layer. Based on variations in suspended sediment concentrations that follow the oscillatory tidal currents, an analytical method referred to as the entrainment flux method for quantifying fluff layer erodibility (specifically, the critical shear stress for erosion and the erosion rate coefficient) was formulated and applied. The results of the entrainment flux method are analogous to the erosion data used to formulate the well-known standard linear erosion formulation; the inferred erosion properties are also comparable to direct measurements of erodibility on sediment samples using a Gust Microcosm. The favorable comparison with the direct measurements suggests that the entrainment flux method can be used to quantify the erodibility of the fluff layer in such systems.Further to the various time-scales of transport in fine sediment systems, another time-scale is that spanning episodic scouring events. In the LPR, such scouring conditions are primarily associated with high river-flow events occurring every few years. During such conditions, depending on river flow-rate, erosion can extend beyond the fluff layer and up to tens of centimeters in the bed; consequently, sediment dynamics during such conditions is dependent on the fluvial forcing. However, during non-event conditions, sediment dynamics are controlled by barotropic and baroclinic circulation. In order to understand and quantify the dynamic impact of the various forcings on transport, an extensive dataset consisting of suspended sediment fluxes, inter-annual morphological change, sediment erodibility, and a numerical hydrodynamic model was analyzed. The former two datasets were used to develop an understanding of sediment dynamics over the full range of hydrologic conditions, and the latter two datasets were used to interpret the system behavior. Subsequently, a conceptual picture was developed, one that classifies the instantaneous morphological status of the system into three regimes dependent on river flow --- under Regime I the system imports sediments, under Regime II the system exports sediments by flushing the fluff layer, and under Regime III the system exports sediments by scouring the less-erodible strata underneath the fluff layer. Regime III is relevant for the long-term morphodynamic equilibrium of the estuary by providing a mechanism that scours and exports sediment accumulated under Regime I conditions. Limited information from the literature suggests that such a conceptualization of sediment dynamics may be common to estuaries characterized by starved-bed transport. These regimes also imply that transport in such systems also depends on the time-history of river flow and the long-term morphological progression of the system, i.e., the system develops a memory (represented by the availability of mobile sediment) that influences subsequent morphological response.The conceptual and quantitative information on transport and sediment dynamics in the LPR was used as the basis for the development of a process-based morphodynamic model. Key processes of relevance in fine sediment settings were formulated and parameterized in the model. Specifically, these include sediment mobility considerations that lead to erosion-limited transport, either due to armoring effects or decreasing sediment erodibility with depth in the bed. The model framework also includes morphological upscaling using the Morfac approach, with specific formulations and considerations relevant for morphodynamics in fine sediment settings. Model performance was assessed against various metrics including suspended sediment concentrations and fluxes, and short- and long-term morphological change. Although the model does not capture measured morphological response at local scales over the short term, it predicts the large-scale spatial and temporal (river flow-dependent) short- and long-term morphological trends of the system. The model was subsequently applied to assess the long-term morphodynamic evolution of the estuary in response to changes in various forcings, with results that are conceptually and theoretically explainable. The results support the application of the morphodynamic model using Morfac for studying the long-term morphodynamic evolution of such fine sediment systems.The overall conceptual findings, and the analytical and numerical methods developed in this dissertation are generally applicable to fine sediment systems characterized by starved-bed conditions. For instance, features such the presence of a fluff layer and its relatively high erodibility, and transport dynamics modulated by river flow have been observed in other systems as well. Similarly, concepts of sediment mobility and erosion-limited transport are also well known in the literature. This dissertation seeks to add to the body of knowledge for such systems by formulating a new method for quantifying the erodibility of the fluff layer, by presenting a conceptualization of sediment dynamics over the full range of hydrological conditions, by presenting a morphodynamic model framework that accounts for sediment mobility and erosion-limited transport, and by extending the applicability of the Morfac approach to fine sediment settings.Environmental Fluid Mechanic
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