Competition and cooperation: Libraries and publishers in the transition to electronic scholarly journals

The conversion of scholarly journals to digital format is proceeding rapidly, especially for those from large commercial and learned society publishers. This conversion offers the best hope for survival for such publishers. The infamous "journal crisis" is more of a library cost crisis than a publisher pricing problem, with internal library costs much higher than the amount spent on purchasing books and journals. Therefore publishers may be able to retain or even increase their revenues and profits, while at the same time providing a superior service. To do this, they will have to take over many of the function of libraries, and they can do that only in the digital domain. This paper examines publishers' strategies, how they are likely to evolve, and how they will affect libraries

Helicopter rotor wake geometry and its influence in forward flight. Volume 1: Generalized wake geometry and wake effect on rotor airloads and performance

An analytic investigation to generalize wake geometry of a helicopter rotor in steady level forward flight and to demonstrate the influence of wake deformation in the prediction of rotor airloads and performance is described. Volume 1 presents a first level generalized wake model based on theoretically predicted tip vortex geometries for a selected representative blade design. The tip vortex distortions are generalized in equation form as displacements from the classical undistorted tip vortex geometry in terms of vortex age, blade azimuth, rotor advance ratio, thrust coefficient, and number of blades. These equations were programmed to provide distorted wake coordinates at very low cost for use in rotor airflow and airloads prediction analyses. The sensitivity of predicted rotor airloads, performance, and blade bending moments to the modeling of the tip vortex distortion are demonstrated for low to moderately high advance ratios for a representative rotor and the H-34 rotor. Comparisons with H-34 rotor test data demonstrate the effects of the classical, predicted distorted, and the newly developed generalized wake models on airloads and blade bending moments. Use of distorted wake models results in the occurrence of numerous blade-vortex interactions on the forward and lateral sides of the rotor disk. The significance of these interactions is related to the number and degree of proximity to the blades of the tip vortices. The correlation obtained with the distorted wake models (generalized and predicted) is encouraging

An Examination of the Relationship Between Published Book Reviews and the Circulation of Books at an Academic Library

The primary purpose of this study was to determine if book reviews are useful and significant indicators of potential circulation. Major book reviewing sources were studied to determine if some were more useful than others in selecting books which circulate. six hypotheses were developed and tested. A random sample of books published and purchased in 1987 was taken from the circulating book collection of the Auraria Library and used to test these hypotheses. Detailed descriptive statistics allowed comparisons between the findings of this research and that of other researchers

The effects of academic libraries’ resource, expenditure, and service decisions on library use: An analysis of ACRL and NCES data

Academic libraries are key contributors to the instructional and research missions of their parent institutions, but often struggle to demonstrate specifically what they do and how that affects institutional outcomes. High-impact educational practices are one area where libraries make a difference, but where explicit connections between activities and outcomes are not always articulated. Faculty and graduate student research is another area where libraries’ contribution makes logical sense, but specific relationships are not necessarily drawn. Libraries may place different emphasis on these two areas, effectively choosing different business strategies, to support their institutions’ missions. Two national surveys collect data about library expenditures, staffing, services, and use of resources. This study aims to explore the extent to which a library’s business strategy might be visible through patterns in these national data sets. What can the data we already have tell us about differences between libraries and how those differences affect library services and use? To what extent can library use data predict an institution’s external research dollars? By using a variety of statistical techniques, including structural equation modeling, MANCOVA, and multiple regression, the researcher explores these questions. The study also explores ways in which current data falls short in being able to connect library activities with high-impact educational practices and faculty and graduate research productivity, and proposes new ideas for measuring library activities such that they could be connected more clearly with institutional outcomes

Workshop on Drought Forecasting for Northeast Brazil

Precipitation forecasting parameters for northeast Brazil were developed. Hydrological, sociological, and economic aspects were examined. A drought forecasting model is presented

Comprehensive rotorcraft analysis methods

The development and application of comprehensive rotorcraft analysis methods in the field of rotorcraft technology are described. These large scale analyses and the resulting computer programs are intended to treat the complex aeromechanical phenomena that describe the behavior of rotorcraft. They may be used to predict rotor aerodynamics, acoustic, performance, stability and control, handling qualities, loads and vibrations, structures, dynamics, and aeroelastic stability characteristics for a variety of applications including research, preliminary and detail design, and evaluation and treatment of field problems. The principal comprehensive methods developed or under development in recent years and generally available to the rotorcraft community because of US Army Aviation Research and Technology Activity (ARTA) sponsorship of all or part of the software systems are the Rotorcraft Flight Simulation (C81), Dynamic System Coupler (DYSCO), Coupled Rotor/Airframe Vibration Analysis Program (SIMVIB), Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics (CAMRAD), General Rotorcraft Aeromechanical Stability Program (GRASP), and Second Generation Comprehensive Helicopter Analysis System (2GCHAS)

Oceanus.

v. 39, no. 2 (1996