Force and cavitation characteristics of the NACA 4412 hydrofoil

This report covers Water Tunnel measurements of the infinite aspect ratio characteristics and cavitation characteristics of a hydrofoil section. The profile tested is identical to the 4412 airfoil section of the National Advisory Committee for Aeronautics and is called the NACA 4412 hydrofoil in this report. Measurements and observations include lift, drag, and pitching moment and the inception and development of cavitation as functions of the angle of attack, velocity, and pressure of the flow. The purpose of this report is to present these measurements of the characteristics of this section in water, to compare the results with other available information on this shape, and to evaluate the Water Tunnel method for obtaining the complte hydrodynamic characteristics of hydrofoils

Voluntary Approaches to Transitioning from Competitive Fisheries to Rights-Based Management: Bringing the Field into the Lab

This paper describes a novel experiment designed to examine how rent dissipation may occur in fisheries in which the right to participate in the fishery is limited and fishermen compete amongst themselves for shares of an exogenous total allowable catch. We demonstrate that rent dissipation may occur through multiple mechanisms, and that the heterogeneity of fishermen has important implications for how rent dissipation occurs and the extent to which different individuals may benefit from the implementation of rights-based management. We apply this approach to investigate the concept of voluntary rights-based management under which managers divide the total allowable catch between two separate fisheries, and fishermen may choose between fishing for a guaranteed individual harvest quota or competing for a share of the total catch in a competitive fishery.

Voluntary Approaches to Transitioning from Competitive Fisheries to Rights-Based Management: Bringing the Field into the Lab

This paper describes a novel experiment designed to examine how rent dissipation may occur in fisheries in which the right to participate is limited and fishermen compete amongst themselves for shares of an exogenous total allowable catch. We demonstrate that rent dissipation may occur through multiple mechanisms, and that the heterogeneity of fishermen has important implications for how rent dissipation occurs and the extent to which different individuals may benefit from the implementation of rights-based management. We apply this approach to investigate the concept of voluntary rights-based management under which managers divide the total allowable catch between two separate fisheries, and fishermen may choose between fishing for a guaranteed individual harvest quota and competing for a share of the total catch in a competitive fishery.experimental economics, fisheries, rights-based management, IHQ, Institutional and Behavioral Economics, Resource /Energy Economics and Policy,

Rethinking the Literary Baroque

John Donne and Baroque Allegory by Hugh Grady. Cambridge: Cambridge University Press, 2017. Hardcover $105.00

Closing the Contextual and Chronological Gap: A Design and Development Study of a Systematic Tool for the Selection of Learning and Performance Support Interventions

Gaps in human performance resulting from a lack of skills and knowledge require solutions – interventions. The process of selecting the most effective intervention (solution) for closing a skills and knowledge gap—such as classroom training, e-Learning, Structured on-the-job Training (SOJT), or job-aid—is a fundamental and vital practice for Human Performance Technology (HPT) practitioners. Unlike other activities in the Performance Improvement/HPT (PI/HPT) model, the activity of intervention selection is ambiguous. Meaning, there is currently no systematic process or tool in place for selecting learning and performance-improvement solutions that is reflective of the learning science. Consequently, the critical activity of intervention selection is often more art than science, especially in contrast to other phases of the PI/HPT model. HPT is, first and foremost, a technology. HPT practitioners apply scientific and organized knowledge to practical ends using rigorous inquiry to provide initial evidence of possible interventions for performance gaps (Stolovitch, 2015). The results-driven approach of HPT empowers performance-improvement practitioners to select and design interventions that are beyond the scope of traditional classroom training. The ambiguity of the intervention selection process presents a persistent challenge for HPT practitioners when selecting between learning and performance-support solutions as well as determining specific modalities for delivery. The United States Coast Guard have been exemplar practitioners of HPT for over two decades, but the need for a systematic intervention selection methodology persisted. To address the need for a new process, a systematic decision-aid tool was developed called the Learning Intervention Type and Modality (LITAM) tool. The tool was designed to integrate seminal literature and research in the learning science field relative to train-to-memory decisions, and modalities of instruction. The LITAM tool was put through rigorous field-testing and evaluations, which validated that these new methods for generating performance intervention recommendations were both accurate and effectual. This paper shares the factors and implications for systematizing the intervention selection process for closing human performance gaps

A Night Out with the Nerds

Simon Singh and Richard Wiseman draw on examples from physics to psychology, to explore the extraordinary in the ordinary in their innovative new play Theatre of Scienc

Revised Crustal Architecture of the Southeastern Carpathian Foreland from Active and Passive Seismic Data

Integration of active and passive source seismic data is employed in order to study the nature of the relationships between crustal seismicity and geologic structures in the southeastern (SE) Carpathian foreland of Romania and the possible connection with the Vrancea Seismogenic Zone (VSZ) of intermediatedepth seismicity, one of the most active earthquakeprone areas in Europe. Crustal epicenters and focal mechanisms are correlated with four deep industry seismic profiles, the reprocessed Danube and Carpathian Integrated Action on Process in the Lithosphere and Neotectonics (DACIA PLAN) profile and the Deep Reflection Acquisition Constraining Unusual Lithospheric Activity II and III (DRACULA) profiles in order to understand the link between neotectonic foreland deformation and Vrancea mantle seismicity. Projection of crustal foreland hypocenters onto deep seismic profiles identifies several active crustal faults in the SE Carpathian foreland and suggests a mechanical coupling between the mantle located VSZ and the overlying foreland crust. The coupled associated deformation appears to take place on the Trotus Fault, the Sinaia Fault, and the newly detected Ialomita Fault. Seismic reflection imaging reveals the absence of west dipping reflectors in the crystalline crust and a slightly east dipping to horizontal Moho in the proximity of the Vrancea area. These findings argue against previously purported mechanisms to generate mantle seismicity in the VSZ including oceanic lithosphere subduction in place and oceanic slab break off, furthermore suggesting that the Vrancea seismogenic body is undetached from the overlying crust in the foreland

An Institutional Framework for Heterogeneous Formal Development in UML

We present a framework for formal software development with UML. In contrast to previous approaches that equip UML with a formal semantics, we follow an institution based heterogeneous approach. This can express suitable formal semantics of the different UML diagram types directly, without the need to map everything to one specific formalism (let it be first-order logic or graph grammars). We show how different aspects of the formal development process can be coherently formalised, ranging from requirements over design and Hoare-style conditions on code to the implementation itself. The framework can be used to verify consistency of different UML diagrams both horizontally (e.g., consistency among various requirements) as well as vertically (e.g., correctness of design or implementation w.r.t. the requirements)