A Look into the Rocky Mountain Herbarium Library Collection and Digital Projects

“From Picas to Pixels” editor Chad Hutchens takes a look into a herbarium library collection that is quickly being digitized and will be available in the new JSTOR Plants database. Dr. Ronald Hartman, curator of the Rocky Mountain Herbarium, discusses the physical collection of thousands of plants, as well as the scope of the collection. Larry Schmidt, science and engineering reference librarian at the University of Wyoming Libraries, talks about digitization efforts and the development of the Rocky Mountain Herbarium online databases.     

AACR2 and the New York State Library's CONSER Project

Abstract

Daisy P. Waters reviews Using Microsoft Access XP, Hazel Cameron reviews Business Statistics on the Web, Elizabeth Parang reviews JSTOR: A History, and Sheila Corman reviews MARC21 for Everyone.     

SUSHI to Go

Abstract

The Internet, Google, e-journals, packages, e-books and patron driven acquisitions have all been perceived as “a threat to libraries as we know them.” Yet, in spite of these developments and under the weight of chronic budget pressures, the typical academic library now offers more users better access to more content and services than ever before. In this session we will look at how librarians and the vendors that serve them have responded to these “threats” to their future to create new and improved services.     

1985 ALA Midwinter Reports

Abstract

As scholars have become more reliant upon electronic scholarly journals, the long-term preservation of these resources has become a growing and increasingly urgent need. In 2002, JSTOR launched a project which has now become Portico, a new, not-for-profit electronic archiving service established to address the scholarly community's critical need for a reliable means to preserve scholarly e-journals. Portico is focused on preserving the intellectual content of e-journals through source file normalization and format migration. To date, seven publishers have agreed to deposit more than 3,000 journals in the archive, which will be sustained by contributions from publishers and libraries.     

Embracing Change

The Internet, Google, e-journals, packages, e-books and patron driven acquisitions have all been perceived as “a threat to libraries as we know them.” Yet, in spite of these developments and under the weight of chronic budget pressures, the typical academic library now offers more users better access to more content and services than ever before. In this session we will look at how librarians and the vendors that serve them have responded to these “threats” to their future to create new and improved services.     

Little Magazine Interview Index 2006

Abstract

Portland State University collection development librarian Jill Emery talks with members of the Orbis Cascade Alliance demand driven acquisitions implementation team, EBL, and YBP Library Services about their participation in a pilot project to acquire e-books that are accessible to and jointly owned by the thirty-seven member libraries of the Orbis Cascade Alliance.     

Opening the Book

Open access book publishers often face different challenges than their counterparts in journal publishing. In particular, the funding models and discovery solutions that work for journal articles may not always function as well for books. Charles Watkinson of the University of Michigan Press answered questions about recent activities in these two areas. University of Michigan Press has participated in Knowledge Unlatched, a platform that allows a large network of libraries to financially support the open access publication of books from several publishers. In order to enhance discovery of these titles and learn more about their use, the press has also begun participating in the new Open Access eBooks on JSTOR program.     

Archiving Websites: A Practical Guide for Information Management Professionals

Abstract

This edition of “From Picas to Pixels” takes an in-depth look at some innovative oral history collections at the University of Texas at Austin. Focusing on one collection in particular, the Texas Legacy Project, Quinn Stewart tells us about old and new ways to encode and offer up high quality transcribed video. Also discussed is the new technology application, Glifos Social Media Creator, that makes these new collections possible. Other ongoing oral history projects at the University of Texas at Austin are addressed.     

Fledging size and survival in snow geese: Timing is everything (or is it?)

In many birds, body size at fledging is assumed to predict accurately the probability of subsequent survival, and size at fledging is often used as a proxy variable in analyses attempting to assess the pattern of natural selection on body size. However, in some species, size at fledging can vary significantly as a function of variation in the environmental component of growth. Such developmental plasticity has been demonstrated in several species of Arctic-breeding geese. In many cases, slower growth and reduced size at fledging has been suggested as the most parsimonious explanation for reduced post-fledging survival in goslings reared under poor environmental conditions. However, simply quantifying a relationship between mean size at fledging and mean survival rate (Francis et al ., 1992) may obscure the pattern of selection on the interaction of the genetic and environmental components of growth. The hypothesis that selection operates on the environmental component of body size at fledging, rather than the genetic component of size per se, was tested using data from the long-term study of Lesser Snow Geese ( Anser c. caerulescens ) breeding at La Pérouse Bay, Manitoba, Canada. Using data from female goslings measured at fledging, post-fledging survival rates were estimated using combined live encounter and dead recovery data (Burnham, 1993). To control for the covariation between growth and environmental factors, survival rates were constrained to be functions of individual covariation of size at fledging, and various measures of the timing of hatch; in all Arctic-breeding geese studied to date, late hatching goslings grow significantly more slowly than do early hatching goslings. The slower growth of late-hatching goslings has been demonstrated to reflect systematic changes in the environmental component of growth, and thus controlling for hatch date controls for a significant proportion of variation in the environmental component of growth. The relationship between size at fledging, hatch date and survival was found to be significantly non-linear; among early hatching goslings, there was little indication of significant differences in survival rate among large and small goslings. However, with increasingly later hatch dates, there was progressively greater mortality selection against smaller, slower growing goslings in most years. This would appear to suggest that body size matters, but not absolutely; small size leads to reduced survival for late-hatching goslings only at La Pe´rouse Bay. Since at least some of the variation in size among goslings for a given hatch date reflects genetic differences, this suggests selection may favour larger size at fledging, albeit only among late-hatching goslings.     

From Picas to Pixels: Innovative Oral Histories on the Web: An Interview with Quinn Stewart, Coordinator of Information, Technology and Lecturer at the University of Texas at Austin School of Information

This edition of “From Picas to Pixels” takes an in-depth look at some innovative oral history collections at the University of Texas at Austin. Focusing on one collection in particular, the Texas Legacy Project, Quinn Stewart tells us about old and new ways to encode and offer up high quality transcribed video. Also discussed is the new technology application, Glifos Social Media Creator, that makes these new collections possible. Other ongoing oral history projects at the University of Texas at Austin are addressed.     

Misspecification of at‐risk periods and distributional assumptions in estimating COPD exacerbation rates: The resultant bias in treatment effect estimation

In trials comparing the rate of chronic obstructive pulmonary disease exacerbation between treatment arms, the rate is typically calculated on the basis of the whole of each patient's follow‐up period. However, the true time a patient is at risk should exclude periods in which an exacerbation episode is occurring, because a patient cannot be at risk of another exacerbation episode until recovered. We used data from two chronic obstructive pulmonary disease randomized controlled trials and compared treatment effect estimates and confidence intervals when using two different definitions of the at‐risk period. Using a simulation study we examined the bias in the estimated treatment effect and the coverage of the confidence interval, using these two definitions of the at‐risk period. We investigated how the sample size required for a given power changes on the basis of the definition of at‐risk period used. Our results showed that treatment efficacy is underestimated when the at‐risk period does not take account of exacerbation duration, and the power to detect a statistically significant result is slightly diminished. Correspondingly, using the correct at‐risk period, some modest savings in required sample size can be achieved. Using the proposed at‐risk period that excludes recovery times requires formal definitions of the beginning and end of an exacerbation episode, and we recommend these be always predefined in a trial protocol.     

Strategies for handling missing data in longitudinal studies with questionnaires

Missing data methods, maximum likelihood estimation (MLE) and multiple imputation (MI), for longitudinal questionnaire data were investigated via simulation. Predictive mean matching (PMM) was applied at both item and scale levels, logistic regression at item level and multivariate normal imputation at scale level. We investigated a hybrid approach which is combination of MLE and MI, i.e. scales from the imputed data are eliminated if all underlying items were originally missing. Bias and mean square error (MSE) for parameter estimates were examined. ML seemed to provide occasionally the best results in terms of bias, but hardly ever on MSE. All imputation methods at the scale level and logistic regression at item level hardly ever showed the best performance. The hybrid approach is similar or better than its original MI. The PMM-hybrid approach at item level demonstrated the best MSE for most settings and in some cases also the smallest bias.     

Some extensions of zero-inflated models and Bayesian tests for them

Zero-inflated power series distribution is commonly used for modelling count data with extra zeros. Inflation at point zero has been investigated and several tests for zero inflation have been examined. However sometimes, inflation occurs at a point apart from zero. In this case, we say inflation occurs at an arbitrary point j. The j-inflation has been discussed less than zero inflation. In this paper, inflation at an arbitrary point j is studied with more details and a Bayesian test for detecting inflation at point j is presented. The Bayesian method is extended to inflation at arbitrary points i and j. The relationship between the distribution for inflation at point j, inflation at points i and j and missing value imputation is studied. It is shown how to obtain a proper estimate of the population variance if a mean-imputed missing at random data set is used. Some simulation studies are conducted and the proposed Bayesian test is applied on two real data sets.     

REGIONAL ECONOMIC-DEMOGRAPHIC MODELLING AND PROJECTION: REVIEW OF AN INTERNATIONAL CONFERENCE

The state-of-the-art in economic-demographic modelling of regional populations was presented at the International Conference on Forecasting Regional Population Change and its Economic Determinants and Consequences held at Airlie House, Virginia, U.S.A. over May 26 to 29, 1982. This review of papers presented at the Conference concludes that such modelling is at an early stage of development and currently provides only an adjunct to more conventional methods of regional forecasting. Given expected future improvements in the theory, data and techniques of economic-demographic modelling, such models could soon provide a worthwhile alternative.     

Short-run price forecast performance of individual and composite models for 496 corn cash markets

Using daily prices from 496 corn cash markets for July 2006–February 2011, this study investigates short-run forecast performance of 31 individual and 10 composite models for each market at horizons of 5, 10, and 30 days. Over the performance evaluation period September 2010–February 2011, two composite models are optimal across horizons for different markets based on the mean-squared error. For around half of the markets at the horizon of 5 days and most of them at 10 and 30 days, the mean-squared error of a market's optimal model is significantly different from those of at least other 23 models evaluated for it. Root-mean-squared error reductions through switching from non-optimal models to the optimal are generally around 0.40%, 0.55%, and 0.87% at horizons of 5, 10, and 30 days.     

Statistics at Liberal Arts Colleges

Statisticians and others who teach statistics at liberal arts colleges enjoy opportunities and encounter difficulties that are unique to the liberal arts setting. In July 1987 a small group of statisticians participated in a workshop at which discussion focused on three major issues: statistics in the liberal arts, the teaching of statistics, and the role of a statistician at a liberal arts college. By summarizing our discussion in this report we hope to provide support for statisticians at liberal arts colleges and to initiate discussion directed toward giving statistics education a prominent position in the liberal arts curriculum.     

Some Asymptotics for Localized Principal Components and Curves

The asymptotic behavior of localized principal components applying kernels as weights is investigated. In particular, we show that the first-order approximation of the first localized principal component at any given point only depends on the bandwidth parameter(s) and the density at that point. This result is extended to the context of local principal curves, where the characteristics of the points at which the curve stops at the edges are identified. This is used to provide a method which allows the curve to proceed beyond its natural endpoint if desired.     

Estimation of life expectancy in the Middle Ages

Summary. In the Middle Ages data on landholders were recorded. We use a selection of these data for estimating the life expectancy of adult males from the higher ranks of English society. The data consist of the age at which the landholder inherited land, a sequence of ages at which he was known to be alive and possibly the age at death. We explain that the date of death is left truncated and right censored at an unknown censoring time. We propose a model to fit (a selection of) the data, we give estimators of the unknown parameters in the model and we present estimates of adult life expectancy.     

Government Publications

Abstract

To determine whether health sciences faculty are sufficiently knowledgeable about copyright, fair use, and related precepts in their use of materials for teaching and research purposes, librarians at two comparable institutions, the University of Alabama at Birmingham (UAB) and the University of Texas Health Science Center at San Antonio (UTHSCSA), conducted a Web survey regarding copyright knowledge among their respective faculty. Responses were similar from both institutions despite the fact that UTHSCSA faculty had access to a more coordinated copyright education effort. Most respondents self-reported at least a limited familiarity with copyright law and fair use.