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Search Results: 1 - 10 of 225424 matches for " Alex C. Londeau "
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Family Forest Owners’ Motivation to Control Understory Vegetation: Implications for Consulting Forestry  [PDF]
Alex C. Londeau, Thomas J. Straka
Open Journal of Forestry (OJF) , 2013, DOI: 10.4236/ojf.2013.34016

Forest vegetation management has evolved as a recognized component of intensive forest management practice. It involves the management of competing vegetation necessary to obtain the high yields expected in modern forest plantations via control of interfering plants that influence regeneration outcome, impact timber stand development, and limit native plant and wildlife diversity. It includes cultural control, fire control, mechanical control, biological control, and chemical control. The public perception of forest vegetation management, especially chemical control, is sometimes negative due to health and environmental concerns. It is an important tool in the forest management alternatives available to consulting foresters managing family forest lands (the vast majority of private forest land in the United States). We report on a study that addresses the motivations of family forest owners that implement forest vegetation management practices and the motivation of those who chose not to implement after forester recommendations to do so. For those who do implement forest vegetation management, improvement of wildlife habitat and increased timber growth was the main motivation. For those who did not, cost was the main concern. Size of forest holding plays a major role in determining who will practice intensive forestry.


Nanobiotechnology in the Management of Glaucoma  [PDF]
Pho Nguyen, Alex Huang, Samuel C. Yiu
Open Journal of Ophthalmology (OJOph) , 2013, DOI: 10.4236/ojoph.2013.34027
Abstract: As the prevalence of glaucoma continues to rise, clinicians and researchers are confronted with an age-old problem: how to reduce risk factors and preserve vision in glaucoma. Current management options revolve around a validated paradigm—intraocular pressure reduction. Active investigations to improve drug delivery efficacy and surgical outcomes are flourishing. This article aims to provide the interested readers with a review of recent discoveries in nanobiotechnology for the management of glaucoma. Targeted drug-delivery systems using mesoscale vectors demonstrate promising delivery profiles. The utility of nanoparticulate therapies to support retinal ganglion cell survival is being investigated. Studies to modulate tissue regeneration and remodeling and improve post-trabeculectomy outcomes are underway. Though these modalities promise new avenues to manage glaucoma, immediate market availability is not anticipated soon.
Consortium Building and Licensing by University Libraries in the Netherlands
Alex C. Klugkist
Liber Quarterly : The Journal of European Research Libraries , 2001,
Abstract: There are 13 university libraries in the Netherlands. Together with the Royal Library in The Hague and the Royal Dutch Academy of Sciences in Amsterdam they form an association, the Association UKB. The UKB is a voluntary association with no formal legal basis. It is a platform for discussing and developing joint policy in the area of scientific information provision and services in the Netherlands. Her main interests include designing a national information infrastructure, organising loans between libraries, developing digital information services, granting consortium-related licenses, agreeing on pricing policies with respect to publishers, co-ordinating collection development and shared cataloguing and indexing. The UKB co-operates closely with PICA, a Dutch corporation for library automation and information, which was founded by a number of Dutch libraries and is now merged with OCLC. Especially in the field of licensing, the UKB has taken a number of important actions over the last few years: For example, it was on the UKB’s initiative that various licensing deals with information providers were concluded. This paper deals with the results achieved so far and reviews some of the experienced successes and problems.
Electronic Dissertations in the Netherlands
Alex C. Klugkist
Liber Quarterly : The Journal of European Research Libraries , 2000,
Abstract: Several Dutch university libraries started full text electronic storing and publishing of scholarly information during the first half of the nineties; they aimed to build up collections of full text digital information and to develop digital user services. Doing so, they wanted to acquire expertise in the areas of producing, converting, indexing and providing electronic documents. The University of Groningen decided to concentrate in the first instance on dissertations (and other university publications), because these documents are quality controlled and free of copyright. At this university each year about 200 dissertations are submitted in all kind of disciplines. From January 1994 Ph D. students were allowed to present an electronic version of their dissertation to the University Library Groningen for interlibrary exchange instead of 50 printed copies.
LIBER Licensing Principles for Electronic Information
Alex C. Klugkist
Liber Quarterly : The Journal of European Research Libraries , 1999,
Abstract: Publishers are working on or are considering - with or without the intervention of libraries - activities such as storage, disclosure and provision of access that traditionally belong to the field of work of libraries. By using the new scope that information technology offers, they try to defend their position in the field of information and, if possible, to strengthen it.
The Research Library and Scholarly Information; a Future for Librarians?
Alex C. Klugkist
Liber Quarterly : The Journal of European Research Libraries , 2002,
Abstract: The development of information technology reminds me in many ways of the discovery of the printing press. They both have given rise to revolutionary new ways of disseminating information faster and on a broader scale. In the 15th century, no one had any awareness of the enormous impact that printing was to have. The first printed works were remarkably similar in appearance to the manuscripts that preceded them, and have consequently been termed cradle books” (incunabula). Printing technology’s effect on the community at large was only gradual, and in the initial stages affected the dissemination of learning and culture only to a minor degree. This had little to do with the new ways of producing information or the form the information was in; it was mainly because only few people had access to education and culture. Researchers were few in number. Long after the rise of printing, academics were still exchanging ideas and research results by journeying to do so in person or by corresponding with each other. It was the way they had always transmitted their knowledge, and they remained true to the tradition.
Digitising Journals: Conference on Future Strategies for European Libraries
Alex C. Klugkist
Liber Quarterly : The Journal of European Research Libraries , 1999,
Abstract: The growing use of electronic journals leads to an ever increasing and widespread wish to retrospectively digitise journals. The process, however, is both costly and complicated and furthermore - basic standards are missing. With a view to working out a better basis for decision-making and examining the possibilities for European co-operation we are pleased to announce that a conference will be organized about: Digitising Journals: Conference on future strategies for European libraries. The Conference is organised by LIBER and Denmark’s Electronic Research Library Programme in co-operation with the European project DIEPER, the North American JSTOR project and NORDINFO, the Nordic Council for Scientific Information.
Colony Foundation in Leafcutting Ants: The Perils of Polygyny in Atta Laevigata (Hymenoptera: Formicidae)
Alex C. Mintzer
Psyche , 1991, DOI: 10.1155/1991/71624
On Zero Modes and the Vacuum Problem -- A Study of Scalar Adjoint Matter in Two-Dimensional Yang-Mills Theory via Light-Cone Quantisation
Alex C. Kalloniatis
Physics , 1995, DOI: 10.1103/PhysRevD.54.2876
Abstract: SU(2) Yang-Mills Theory coupled to massive adjoint scalar matter is studied in (1+1) dimensions using Discretised Light-Cone Quantisation. This theory can be obtained from pure Yang-Mills in 2+1 dimensions via dimensional reduction. On the light-cone, the vacuum structure of this theory is encoded in the dynamical zero mode of a gluon and a constrained mode of the scalar field. The latter satisfies a linear constraint, suggesting no nontrivial vacua in the present paradigm for symmetry breaking on the light-cone. I develop a diagrammatic method to solve the constraint equation. In the adiabatic approximation I compute the quantum mechanical potential governing the dynamical gauge mode. Due to a condensation of the lowest omentum modes of the dynamical gluons, a centrifugal barrier is generated in the adiabatic potential. In the present theory however, the barrier height appears too small to make any impact in this odel. Although the theory is superrenormalisable on naive powercounting grounds, the removal of ultraviolet divergences is nontrivial when the constrained mode is taken into account. The open aspects of this problem are discussed in detail.
Ni-Au: A testing ground for theories of phase stability
C. Wolverton,Alex Zunger
Physics , 1997,
Abstract: The theory of phase stability in the Ni-Au alloy system is a popular topic due to the large size mismatch between Ni and Au, which makes the effects of atomic relaxation critical, and also the fact that Ni-Au exhibits a phase separation tendency at low temperatures, but measurements at high-temperature show an ordering-type short-range order. We have clarified the wide disparity which exists in the previously calculated values of mixing energies and thermodynamic properties by computing ``state-of-the-art'' energetics (full-potential, fully-relaxed LDA total energies) combined with ``state-of-the-art'' statistics (k-space cluster expansion with Monte Carlo simulations) for the Ni-Au system. We find: (i) LDA provides accurate mixing energies of disordered Ni_{1-x}Au_x alloys (\Delta H_{mix} < +100 meV/atom) provided that both atomic relaxation (a ~100 meV/atom effect) and short-range order (~25 meV/atom) are taken into account properly. (ii) Previous studies using empirical potentials or approximated LDA methods often underestimate the formation energy of ordered compounds, and hence also underestimate the mixing energy of random alloys. (iii) Measured values of the total entropy of mixing combined with calculated values of the configurational entropy demonstrate that the non-configurational entropy in Ni-Au is large, and leads to a significant reduction in miscibillity gap temperature. (iv) The calculated short-range order agrees well with measurements, and both predict ordering in the disordered phase. (v) Consequently, using inverse Monte Carlo to extract interaction energies from the measured/calculated short-range order in Ni-Au would result in interactions which would produce ordering-type mixing energies, in contradiction with both experimental measurements and precise LDA energies.
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