8,404 research outputs found
Goodbye to all that: Disintermediation, disruption and the diminishing library
The librarianâs role in collection development is being eroded through disintermediation. A number of factors are contributing to this:
⢠With the Big Deals for e-journals power has shifted considerably in the publishersâ favour, and librariesâ freedom to make collection development decisions has been curtailed. If the trend towards national deals and block payments, seen for instance in the Scottish Higher Education Digital Library (SHEDL), continues, this freedom will be eroded even more; acquisitions decisions are increasingly made at the level of publisher rather than title.
⢠A notable response to the power of the publishersâ monopoly is the open access movement, which aims to make scholarly literature freely available to all. One route is through open access publishing, where typically the author, or their institution or research funder, pays the cost of peer review and publishing. The other route is the deposit of pre- or post-prints of traditionally published materials in the authorâs institutional repository or in a subject repository such as Arxiv. The librarian again is making no decisions on availability in collections.
⢠E-book technology has enabled the introduction of so-called âpatron selectionâ or âpatron driven acquisitionâ (PDA). Suppliers of e-books are now offering libraries the opportunity to make available a fund to be spent on new e-book titles as they become popular with library users. PDA is becoming increasingly popular: a recent survey of 250 libraries in the USA showed that â32 have PDA programs deployed; 42 planned to have a program deployed within the next year; and an additional 90 plan to deploy a program within the next three yearsâ (http://www.libraries.wright.edu/noshelfrequired/?p=932). Librarians are able to impose some restrictions â for instance specifying subjects or ranges of titles; otherwise selection is taken out of the hands of librarians and entrusted to users . Initial statistics show the usage of many titles selected by users to be as high as the usage of titles selected by librarians or academics.
⢠Googleâs massive digitisation programme, although currently under legal threat, is another example.
In the disintermediated world the librarianâs role is changing. It will in my view become increasingly focused not on externally produced resources, but on creating, developing and maintaining repositories of materials, whether learning objects, research data-sets or research outputs, produced in house in their own institution.
Traditionally librarians have sought through the art of collection development to obtain the outputs of the worldâs scholars and make them available to the scholars of their own institution â an impossible task. However our role is now being reversed: it will be to collect the outputs of our own institutionâs scholars and make them freely available to the world. This task is capable of achievement and attains the aim of universal availability of scholarship to scholars. However it is not collection development as it has been practised down the years in the print world; that art, it can be argued, will no longer be needed in the era of disintermediation
Seasonal Growth of Waterhyacinth in the Sacramento/San Joaquin Delta, California
Waterhyacinth (
Eichhornia crassipes
(Mart.) Solms), is a serious
problem in the Sacramento/San Joaquin Delta, California.
There is little published information on its phenology or
seasonal growth in this system. Waterhyacinths were sampled
at 2 to 3 week intervals from November, 1995 to July, 1997
and the following measurements were made on individual
plants: dry weight, height, number of living leaves, number of
dead leaves, and the width of the largest lamina. (PDF has 4 pages.
Do tissue carbon and nitrogen limit population growth of weevils introduced to control waterhyacinth at a site in the Sacramento-San Joaquin Delta, California?
Waterhyacinth (Eichhornia crassipes(Mart.) Solms), is a serious problem in the Sacramento Delta. Two weevil species
(Neochetina bruchi Hustache and N. eichhorniae
Warner) have been introduced as biological control agents. The purpose of this study was to test the hypothesis that nitrogen (N) in the tissue of waterhyacinth was not sufficient to support weevil growth and reproduction. Because it grows better on plants with high N content and because it has a greater impact on the growth of high N plants, N. bruchi may be a more effective biological control agent in the Sacramento Delta
Interactions between American pondweed and monoecious hydrilla grown in mixtures
To assess the potential for monoecious hydrilla (
Hydrilla
verticillata
(L.f.) Royle) to invade existing aquatic plant communities,
monoecious hydrilla was grown in mixtures with
American pondweed (
Potamogeton nodosus
Poiret). When
grown with hydrilla
from axillary turions, American pondweed
was a stronger competitor. When grown with hydrilla
from tubers, American pondweed was equally as strong a
competitor as hydrilla
Seasonal Changes in Chemical Composition of Eurasion Watermilfoil (Myriophyllum spicatum L.) and Water Temperature at Two Sites in northern California: implications for Herbivory
We compared seasonal changes in Eurasian watermilfoil (Myriophyllum spicatum L.) characteristics and water temperature for a shallow poind in Davis, CA, and the Truckee River, near Tahoe City, CA. Tissue C and N were 15% lower in plants from the Truckee River than in plants from the Davis pond. Seasonal fluctuations in tissue N were also different. Mean phenolic acid content of Truckee River palnts (162yM g-1) was less than those from the shallow pond (195 yM g-1). Phenolic acid content was positively related to tissue C for Truckee River and Davis pond plants and, tissue C:N ratio for Truckee River plants. Mean monthly water temperature (1990 to 1998) for the Truckee River site was less than 20 C. Water temperatures were warmer in August and September at this site. However, Eurasian watermilfoil collected during these months was characterized by lower levels of tissue N. During a 29-month period beginning January 1994, mean monthly water temperature for the Davis pond exceeded 20 C, only during July to September 1995. Tissue N was generally greater during summer for watermilfoil growing in the pond. These results imply that Eurasian watermilfoil biological control agents may have different developmental rates in these habitats, and thus different impacts on watermilfoil populations
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