Preference and performance linkage in aPhyllocolpa sawfly on the willow,Salix miyabeana, on Hokkaido

A leaf-folding sawfly in the genusPhyllocolpa (Hymenoptera: Tenthredinidae) attackingSalix miyabeana (Salicaceae) was studied near Sapporo, Hokkaido, along the Ishikari River in 1993. Host plant individuals were young trees 4–7 years old which were growing rapidly, producing some long shoots with large leaves. On a gradient of shoot length classes from 0–5 cm long to over 80 cm long, shoots were much more abundant in the shorter shoot length classes. However, attacks by ovipositing females increased as shoot length increase from 0 attacks on the shortest shoots to 5.17 attacks per shoot on the longest shoots. The frequency of attack per leaf increased from 0 to 0.13 over the same range of shoot lengths. This pattern of attack resulted in a high frequency of larval establishment in feeding sites, between 0.96 and 1.00, in all attacked shoot length categories. However, probability of survival to a late instar larva increased with shoot length and corresponded to the attack pattern, indicating a preference-performance linkage between female ovipositional decisions and larval survival. The patterns found for thisPhyllocolpa species are similar for galling sawflies in North America and Europe, especially in the genusEuura, members of which make stem, bud and leaf midrib galls. Extending the pattern to aPhyllocolpa species broadens identification of pattern and ultimately the generality of the emerging theory on populations of galling sawflies.     

Recommended Distributions for Exposure Factors Frequently Used in Health Risk Assessment

Although there has been nearly complete agreement in the scientific community that Monte Carlo techniques represent a significant improvement in the exposure assessment process, virtually all state and federal risk assessments still rely on the traditional point estimate approach. One of the rate-determining steps to a timely implementation of Monte Carlo techniques to regulatory decision making is the development of "standard" data distributions that are considered applicable to any setting. For many exposure variables, there is no need to wait any longer to adopt Monte Carlo techniques into regulatory policy since there is a wealth of data from which a robust distribution can be developed and ample evidence to indicate that the variable is not significantly influenced by site-specific conditions. In this paper, we propose several distributions that can be considered standard and customary for most settings. Age-specific distributions for soil ingestion rates, inhalation rates, body weights, skin surface area, tapwater and fish consumption, residential occupancy and occupational tenure, and soil-on-skin adherence were developed. For each distribution offered in this paper, we discuss the adequacy of the database, derivation of the distribution, and applicability of the distribution to various settings and conditions.     

The application of microcomputers in production management

The findings reported result from a questionnaire survey, and a number of company interviews. Further questions which need to be answered are identified, and a research project to provide these answers is outlined.     

Cognition in Situations

The symbolic interactionist tradition can contribute to advancing sociological studies of cognition by setting dual process models on more solid ground. I draw on Blumer's epistemological statements and the interactionist tradition more broadly to consider how dual process models of cognition could be applied to naturally occurring situations. I suggest that attending to the ways the past and the future are handled and modified within social interaction provides a usable inroad for the sociology of cognition to engage with situational analysis. I identify “resonance” and “iterative reprocessing” as concepts that are suitable to this end.     

Are Mothers and Fathers Interchangeable Caregivers?

Abstract

Recent debates about same-sex marriage have raised questions concerning the interchangeability of mothers and fathers. This paper provides three pieces of empirical evidence that highlight the distinct role that fathers and mothers play in the home. First, we use time-use data to show that fathers and mothers provide different amounts of time to their children regardless of who is the breadwinner in the household. Second, we show that men and women choose different occupations, with men more likely to choose occupations that have a protective role and mothers more likely to choose an occupation with a nurturing role. Third, we find that children are much less likely to experience domestic violence and neighborhood violence when there is a father in the home.     

Changing Meanings of Authority in Contemporary Rural India

The article explores political meanings in the context of recent economic and political changes in a village in south India. Cultural constructions of political relations emerged in conversations between the author and village informants in Andhra Pradesh. Informants perceived decline in the power and authority of former village lords and talked about the establishment of authority in the new setting. In processes of democratization which had taken place, showing and receiving honor and respect continued as political and social preoccupations. However, deserving honor and respect has become less a statement about political superiority and domination and more about individual moral qualities.

Reports of Conferences,Institutes, and Seminars

A busy time for librarians was late May through early July 2008 with the Ohio Valley Group of Technical Services Librarians meeting May 14–16, the North American Serials Interest Group meeting June 5–8, and an American Library Association preconference Electronic Serials 101: What I Wished I’d Known Before I Got in Over My Head, June 27.     

Retirement for women: the impact of employment

This study compares the retirement experiences of professional and nonprofessional women. The analysis is based on 48 interviews with women ranging in age from 63-83 years. Participants provided personal and occupational histories and described their retirement decisions, transitions, and lives in retirement. The women's retirement experiences differed in five areas: (1) attachment to work, (2) professional identity, (3) social contacts, (4) family roles/obligations, and (5) community involvement. Findings indicate investment in the work role does affect how women transition to retirement as well as how they structure their time in retirement.