Computer program for the prediction of reorientation flow dynamics

Program uses Navier-Stokes and continuity equations for incompressible, viscous fluid as the basic equations governing reorientation flow dynamics. Program can simulate curved as well as straight-walled boundaries; has ability to calculate both free-surface and confined flows; and can be used in either cylindrical or plane geometry

Experience of a Confederate Chaplain, 1861-1864

Edited by W. A. Betts. A. D. Betts was the chaplain of the 30th NC troops.https://digitalcommons.wofford.edu/localhist/1008/thumbnail.jp

The Mackenzie Inuit Whale Bone Industry: Raw Material, Tool Manufacture, Scheduling, and Trade

The bones of bowhead whales (Balaena mysticetus) were used by Mackenzie Inuit groups in producing a number of items essential to transportation and procurement. However, the whale bone industry, and its relationship to Mackenzie Inuit economic and social systems, is poorly understood. A recently excavated archaeological assemblage from McKinley Bay, Northwest Territories, provides a record of intensive Nuvugarmiut whale bone tool manufacture, which can be used to reconstruct a reduction sequence. Bowhead bone reduction at McKinley Bay focused on ribs, which were transversely worked into large sections. Cortical blanks were isolated from central rib sections, but proximal and distal rib sections were treated directly as blanks and preforms for the production of large durable tools, such as harpoon heads, adze sockets, mattock blades, and picks. The intensive whale bone reduction at McKinley Bay was part of a broader gearing-up strategy focused on the manufacture and repair of sleds and harpoons needed for the late winter migration and spring seal hunt. More generally, because the whale bone industry was intimately related to the bowhead hunt and its proceeds, it may provide fundamental insights about key aspects of coastal whaling societies, such as social organization, redistribution, and inter-territorial trade.Les groupes d’Inuits du Mackenzie se servaient des os de baleines boréales (Balaena mysticetus) pour produire un certain nombre d’articles essentiels en matière de transport et d’approvisionnement. Cependant, l’industrie des os de baleine, de même que son lien avec les systèmes socioéconomiques des Inuits du Mackenzie, sont mal compris. Grâce à des fouilles archéologiques récentes à la baie de McKinley, dans les Territoires du Nord-Ouest, on a découvert une installation de fabrication intensive d’outils en os de baleine au Nuvugarmiut, ce qui a permis de reconstruire une séquence de transformation. La transformation d’os de baleines boréales à la baie de McKinley portait sur les côtes de baleine. Celles-ci étaient travaillées en grosses sections. Les pièces brutes corticales étaient isolées des sections de côtes centrales, tandis que les sections de côtes proximales et distales étaient traitées directement en tant que pièces brutes et ébrutées en vue de la réalisation de gros outils durables, comme des masses de harpon, des douilles d’herminettes, des lames de pioches ou de haches et des pics. La transformation intensive des os de baleine à la baie de McKinley relevait d’un programme plus important de fabrication et de réparation de traîneaux et de harpons dont les gens se servaient pour la migration de fin d’hiver et la chasse au phoque du printemps. De manière plus générale, puisque l’industrie des os de baleine était étroitement liée à la chasse à la baleine et à ses produits, elle pourrait permettre d’en savoir plus sur des aspects clés des sociétés baleinières de la côte, comme l’organisation sociale, le répartition du peuple et le commerce entre les territoires

Changing the model of workplace e-learning : a platform to facilitate autonomous social e-learning for adult learners : Innovation report

E-learning has a significant blind spot (Dalziel, 2003). The predominant existing model of delivering instructional 'Courseware' via a Learning Management System (LMS) is expensive to produce and often isolating; eschewing many seminal lessons concerning the importance of social context in a learning scenario (Dewey, 1938). Following a review of literature, a new method of facilitating workplace Elearning was devised, focused on user-generated content and the notion of a more social E-learning experience. This new method has subsequently been dubbed the Curatr Learning Cycle (CLC). To encourage user participation, a technique known as gamification was harnessed; the use of digital game-like progress measures in a non-game context. A software platform was devised to enable the new approach to be tested in the real world. Following positive testing results, the software platform received a wide commercial launch and became known as ‘Curatr’. Using the CLC as a template of the actions that need to be facilitated for an effective social E-learning experience, organisations can create workplace E-learning that is quick to deploy, low cost and highly effective. The CLC and Curatr represent a potentially disruptive innovation to the workplace E-learning marketplace, with the possibility to displace earlier technology and existing methods. Since its launch, Curatr has been recognised nationally and internationally as a disruptive innovation in workplace E-learning. The software has led to the commercial turnaround of its parent organisation and has been deployed to businesses globally. Research conducted as part of this project has led to the publication of journal articles, book chapters and conference papers

Whiter, brighter, and more stable cellulose paper coated with antibacterial carboxymethyl starch stabilized ZnO nanoparticles

Small, carboxymethyl-starch-stabilised zinc oxide nanoparticles with a defined shape, size and morphology were prepared in situ in water at relatively low reaction temperatures using soluble carboxymethyl starch (CMS) as a combined crystallising, stabilising and solubilising agent and triethanolamine as the reducing agent. Aqueous colloidal solutions of these CMS-stabilised ZnO nanoparticles were used to deposit a coating of ZnO nanoparticles on cellulose paper by a wet-chemistry, polyelectrolyte, layer-by-layer approach using water as the only solvent. Such cellulose paper samples, coated with these CMS-stabilised ZnO nanoparticles, show higher brightness and whiteness than that of blank reference paper and are more stable to UV-radiation than the paper reference as well as demonstrating good antibacterial activity against MRSA and A. baumannii

Persistent superfluid phase in a three-dimensional quantum XY model with ring exchange

We present quantum Monte Carlo simulation results on a quantum S=1/2 XY model with ring exchange (the J-K model) on a three-dimensional simple cubic lattice. We first characterize the ground state properties of the pure XY model, obtaining estimations for the energy, spin stiffness and spin susceptibility at T=0 in the superfluid phase. With the ring exchange, we then present simulation data on small lattices which suggests that the superfluid phase persists to very large values of the ring exchange K, without signatures of a phase transition. We comment on the consequences of this result for the search for various exotic phases in three dimensions.Comment: 4 pages, 4 figure

Trajectory generation for road vehicle obstacle avoidance using convex optimization

This paper presents a method for trajectory generation using convex optimization to find a feasible, obstacle-free path for a road vehicle. Consideration of vehicle rotation is shown to be necessary if the trajectory is to avoid obstacles specified in a fixed Earth axis system. The paper establishes that, despite the presence of significant non-linearities, it is possible to articulate the obstacle avoidance problem in a tractable convex form using multiple optimization passes. Finally, it is shown by simulation that an optimal trajectory that accounts for the vehicle’s changing velocity throughout the manoeuvre is superior to a previous analytical method that assumes constant speed

Characteristics of tropical squall-lines over Venezuela

July 1974.Includes bibliographical references.Sponsored by the National Science Foundation, Atmospheric Sciences Section GA-33182

Analytical sun synchronous low-thrust manoeuvres

Article describes analytical sun synchronous low-thrust manoeuvres

Optimal control technique for Many Body Quantum Systems dynamics

We present an efficient strategy for controlling a vast range of non-integrable quantum many body one-dimensional systems that can be merged with state-of-the-art tensor network simulation methods like the density Matrix Renormalization Group. To demonstrate its potential, we employ it to solve a major issue in current optical-lattice physics with ultra-cold atoms: we show how to reduce by about two orders of magnitudes the time needed to bring a superfluid gas into a Mott insulator state, while suppressing defects by more than one order of magnitude as compared to current experiments [1]. Finally, we show that the optimal pulse is robust against atom number fluctuations.Comment: 5 pages, 4 figures, published versio