Critical Assessment of the Foundations of Power Transmission and Distribution Reliability Metrics and Standards

The U.S. federal government regulates the reliability of bulk power systems, while the reliability of power distribution systems is regulated at a state level. In this article, we review the history of regulating electric service reliability and study the existing reliability metrics, indices, and standards for power transmission and distribution networks. We assess the foundations of the reliability standards and metrics, discuss how they are applied to outages caused by large exogenous disturbances such as natural disasters, and investigate whether the standards adequately internalize the impacts of these events. Our reflections shed light on how existing standards conceptualize reliability, question the basis for treating large‐scale hazard‐induced outages differently from normal daily outages, and discuss whether this conceptualization maps well onto customer expectations. We show that the risk indices for transmission systems used in regulating power system reliability do not adequately capture the risks that transmission systems are prone to, particularly when it comes to low‐probability high‐impact events. We also point out several shortcomings associated with the way in which regulators require utilities to calculate and report distribution system reliability indices. We offer several recommendations for improving the conceptualization of reliability metrics and standards. We conclude that while the approaches taken in reliability standards have made considerable advances in enhancing the reliability of power systems and may be logical from a utility perspective during normal operation, existing standards do not provide a sufficient incentive structure for the utilities to adequately ensure high levels of reliability for end‐users, particularly during large‐scale events.     

2009 New England Technical Services Librarians (NETSL) Spring Conference: Working the Cataloging Landscape: Fishing,Mining, and Harvesting

Abstract

Rachel Fleming and Kristin Calvert of Western Carolina University discuss their study of interlibrary loan borrowing requests in the three years surrounding a journal cancellation project. Noting that the impact of such a cancellation on interlibrary loan has not been studied since the 1990s, they examine numerous facets of requests for cancelled and non-cancelled journals, including request per journal, year of article requested, and request history for newly cancelled journals. Though journal cancellations resulted in a 2 percent increase in interlibrary loan requests, this number proved so small that Calvert and Fleming judged that their cancellations caused no undue effects.     

Engaging through Learning—Learning through Engaging: An Alternative Approach to Professional Learning about Human Diversity

This paper presents an alternative framework for construing learning about human diversity as an ongoing, socially constructed, contextual process based in relational learning. The approach enables shifts in understanding for teachers, students, practitioners, client groups and organizations. Conceived to strengthen professional social workers' capacity for on the job learning, this approach provides another entry point for social work faculty to conceptualize the learning process as relational, contextual and process based. It seeks to capitalize on the learning process itself as a mechanism through which learners simultaneously engage one another around issues of culture, identity, and difference and learn through the engagement. The approach is guided by four conceptual touchstones, 14 years of social work practice in a global context, and eight iterations of teaching a masters level diversity course. Eight constructs animate this process approach. They include: exposure, engagement, emotion, empathy, narrative, personal disposition, the learning environment, and a sense of ‘self‐in‐relation’. In addition to illuminating the social structures and social processes that construct diversity, the approach can also engender the sense of relational solidarity among learners necessary for prolonged commitment to social change.     

Reports of Conferences, Institutes, and Seminars

Late winter and early spring of 2009 was a busy conference time for librarians. Some of the conferences held during that time are reported herein: the American Library Association Midwinter Conference, January 23–28; Electronic Resources and Libraries (E&RL), February 9–12; the North Carolina Serials Conference, March 27; the New England Technical Services Librarians' (NETSL) Spring Conference, April 17; and the Technical, Electronic and Digital Services Interest Group (TEDSIG) Spring Meeting, April 24.     

Modeling Logistic Performance in Quantitative Microbial Risk Assessment

In quantitative microbial risk assessment (QMRA), food safety in the food chain is modeled and simulated. In general, prevalences, concentrations, and numbers of microorganisms in media are investigated in the different steps from farm to fork. The underlying rates and conditions (such as storage times, temperatures, gas conditions, and their distributions) are determined. However, the logistic chain with its queues (storages, shelves) and mechanisms for ordering products is usually not taken into account. As a consequence, storage times—mutually dependent in successive steps in the chain—cannot be described adequately. This may have a great impact on the tails of risk distributions. Because food safety risks are generally very small, it is crucial to model the tails of (underlying) distributions as accurately as possible. Logistic performance can be modeled by describing the underlying planning and scheduling mechanisms in discrete-event modeling. This is common practice in operations research, specifically in supply chain management. In this article, we present the application of discrete-event modeling in the context of a QMRA for  Listeria monocytogenes  in fresh-cut iceberg lettuce. We show the potential value of discrete-event modeling in QMRA by calculating logistic interventions (modifications in the logistic chain) and determining their significance with respect to food safety.     

The Migratory Response of Labor to Special Economic Zones in the Philippines, 1995–2005

In the mid 1990s the Filipino government adopted a new export-led development policy in an attempt to attract new investments and lower the unemployment rates throughout the country. The central idea was to provide foreign investors more access to Filipino markets and labor by giving them investor tax breaks and lowering trade tariffs. In return, the government hoped that investors would bring large amounts of capital into designated areas thereby creating new jobs and stimulating the domestic economy. The Filipino created the Philippine Economic Zone Authority (PEZA) and Base Conversion Development Authority (BCDA) to manage the operation of the Special Economic Zones (SEZ) throughout the country. Between 1995 and 2005 PEZA and BCDA approved over 200 new SEZ that have created over four million jobs throughout the country. However, these jobs are concentrated in a small number of regions. This research uses a modified Harris-Todaro model and GIS techniques to examine the inter-regional migration response to the PEZA and BCDA programs’ geographically targeted investments. We show that areas with the highest job growth have high rates of in-migration while regions with low SEZ related investments have become migration-sending areas. In addition, our analysis shows that in-migration to SEZ affected areas has tended to surpass available jobs resulting in high unemployment. We show how the Harris-Todaro model in combination with GIS might be used to identify locations for future PEZA and BCDA investments that are less likely to result in regional population loss or growth in unemployment.     

Gender Differences in Heterosexual College Students' Conceptualizations and Indicators of Sexual Consent: Implications for Contemporary Sexual Assault Prevention Education

Because sexual assault is often defined in terms of nonconsent, many prevention efforts focus on promoting the clear communication of consent as a mechanism to reduce assault. Yet little research has specifically examined how sexual consent is being conceptualized by heterosexual college students. In this study, 185 Midwestern U.S. college students provided responses to open-ended questions addressing how they define, communicate, and interpret sexual consent and nonconsent. The study aimed to assess how college students define and communicate consent, with particular attention to gender differences in consent. Results indicated no gender differences in defining consent. However, there were significant differences in how men and women indicated their own consent and nonconsent, with women reporting more verbal strategies than men and men reporting more nonverbal strategies than women, and in how they interpreted their partner's consent and nonconsent, with men relying more on nonverbal indicators of consent than women. Such gender differences may help to explain some misunderstandings or misinterpretations of consent or agreement to engage in sexual activity, which could partially contribute to the occurrence of acquaintance rape; thus, a better understanding of consent has important implications for developing sexual assault prevention initiatives.     

Human Immunodeficiency Virus (HIV) Seropositive Homeless Men: Behavioral and Social Characteristics

Homeless persons living in US. innercities are at risk for human immunodeficiency virus (HW) infection, but few studies have examined the continued risk behaviors of HIV infected homeless men. We investigated the sexual behavior of 32 homeless men who had tested HIV seropositive. Twenty-five percent of HW positive men reported a history of injection drug use, 34% had sex with men, over 40% had participated in commercial sex, and 59% had been treated for a non-HIV sexually transmitted disease. HIV seropositive men also reported recent sexual behavior, with 62% having sex in the previous month and 50% currently sexually active. Condom use was inconsistent among seropositive men; 44% of vaginal and 50% of anal intercourse occasions in the preceding three months did not involve condoms, and 28% of HW seropositive men did not use a condom during their most recent sexual encounter. Substance use was frequently associated with unprotected sexual behavior among HW seropositive men. Finally, measures of life satisfaction showed that HIV seropositive men were most satisfied with their relationships, mental health, and spiritual well being. These data suggest a need for intensive behavioral.interventions tailored for homeless HW infected men and we recommend that existing substance use treatment and holistic care be incorporated into behavioral interventions for HW infected men.