Application of wavelets to the pre-processing of underwater sounds

In this paper we consider data on underwater sounds of differing types. Our objective is to filter background noise and achieve an acceptable level of reduction in the raw data, whilst at the same time maintaining the main features of the original signal. In particular, we consider data compression through the use of wavelet analysis followed by a thresholding of small coefficients in the resulting multiresolution decomposition. Various methods to threshold the wavelet representation are discussed and compared using recordings of dolphin sounds. An empirical modification to one of them is also proposed which shows promise in better preserving certain structures in our particular sound data.     

A RANDOMIZATION PROBLEM IN FORMING DESIGNS WITH SUPERIMPOSED TREATMENTS1

Some programmes of experimentation require the superimposition of a new set of treatments on an existing experiment. Randomization of such treatments has received little attention in the literature but merits careful consideration. The present paper examines two apparently different theoretical approaches, one in effect randomizing the experiments together and the other randomizing the second experiment without reference to any randomization used in the first. In the simplest superimpositions the two methods give identical results in practice but problems arise when one Latin square is to be superimposed on another.     

Family Members' Reports of Non-Staff Abuse in Michigan Nursing Homes

Recent research showed that mistreatment of nursing home residents by other residents may be highly prevalent. The present study examined the issue from family members' perspectives. The data came from the 2005 and 2007 random-digit dial telephone surveys of Michigan households with a family member in long-term care. Based on family members' reports, about 10% of nursing home residents aged 60 and over were abused by non-staff in nursing homes (e.g., other residents and visitors) during the past 12 months. Family members were more likely to report non-staff abuse when the nursing home residents were younger, were female, had behavior problems, and had greater level of physical functioning. Family members who reported staff abuse were four times more likely to also report non-staff abuse.     

Racial Differences in Attitudes Toward Professional Mental Health Treatment: The Mediating Effect of Stigma

Stigma associated with mental illness continues to be a pervasive barrier to mental health treatment, leading to negative attitudes about treatment and deterring appropriate care seeking. Empirical research suggests that the stigma of mental illness may exert an adverse influence on attitudes toward mental health treatment and service utilization patterns by individuals with a mental illness, particularly African Americans. However, little research has examined the impact of stigma on racial differences in attitudes toward seeking mental health treatment. This study examined the hypothesis that stigma partially mediates the relationship between race and attitudes towards mental health treatment in a community-based sample of 101 African American and White older adults. Multiple regression analyses and classic path analysis was utilized to test the partial mediation model. Controlling for socio-demographic factors, African American older adults were more likely to have negative attitudes toward mental health treatment, and they also reported more public and internalized stigma than their White counterparts. As hypothesized, the relationship between race and attitudes toward mental health treatment was partially mediated by internalized stigma, suggesting that internalized stigma may cause older adults to develop negative attitudes about mental health treatment. The partial mediation model was not significant for public stigma, however. Implications for social work research and practice are discussed.     

Local Solutions to Inequality: Steps Toward Fostering a Progressive Social Movement

Over the past four decades, inequality of income, wealth, and power have become increasingly extreme in the United States. The triumph of a neoliberal agenda to reduce taxes, deregulate the economy, and promote international trade has undermined the economic status of the middle class, increased poverty, and led to a concentration of wealth. This nation has gone through such periods before, followed by progressive movements that have realigned economic and political forces. I argue that we may be at a point where a new progressive social movement is about to emerge and I point out several areas where rural sociologists are working, such as local food systems, that reflect a reorientation of social values supporting such a movement. Promoting local food systems and similar locality‐based enterprises can foster economic relationships embedded in multistranded social relationships and contribute to progressive change through reducing the central role of large corporations in our daily lives. Building on Busch's (1999) concept of Leviathan, I identify the roles of researchers and community activists in which rural sociologists can work to democratize social, economic, and political relationships in society.     

Dollar appreciation,deficit stimulation,and the new protectionism

This article probes whether contemporary U.S. protectionism arises from an appreciating dollar. It concludes that (a) an enrich-thy-neighbor policy of upvaluation has transformed the current U.S. economic recovery into an engine of global recovery; (b) flexible exchange rates continually equilibrate the balance of payments as evidenced in changed domestic—relative to foreign—prices, as well as in capital movements induced by interest-rate differentials resulting from exchange-rate shifts; and (c) flexible exchange rates automatically alter so as to maintain a country's competitive position in the world economy even when facing deficits at home and abroad.     

Black Youth Violence Has a Bad Rap

This research elicited and assessed the perspectives on violence of 41 middle-school students attending a unique school in a low-income section of a large northern California city. Through participation in and observation of instruction and other school-related activities, the researchers explored ways that these students experienced and reflected on violence in their lives and in popular culture. The researchers probed ways that these students' interpreted or reflected upon rap music and hip-hop culture, particularly its representations of violence, crime, and sex. This research provided insights into what these youth thought about violence in their lives including its depictions in electronic media. Additionally, it revealed ways that they resisted and/or critiqued some negative images and influences of hip-hop and rap.     

Black Interactionist Thought and the Lived-Experience Approach to Symbolic Interactionism

Du Bois is often regarded as an important scholar for his contributions to the development of sociology. However, less is known about his work in developing interactionist thought. This essay is an introduction to this special issue, and a small attempt to acknowledge the work of scholars of color within the interactionist tradition. The Du Bosian approach to sociology has for too long been dismissed out of hand. Scholars pursuing new areas of inquiry, topics outside the bounds of “mainstream sociology,” are often met with fierce resistance—even today. Instead of building these scholars up, through mentorship and aid, so-called “accomplished” scholars see fit to tear down the work of those not like them. The Du Bosian perspective celebrates the plurality of voices, advocates for mentorship, and sees sociological inquiry as rooted in the real needs and concerns of those so marginalized. As this collection of articles illustrates, even when conforming to scientific standards work in this tradition has a political dimension as it lays bare the inequities in society—even, at times, drawing government interference with their work. This issue also calls upon professional sociologists to reflect on the ways they reproduce these patterns within the discipline and higher education.     

A Transaction‐Efficiency Analysis of an Internet Retailing Supply Chain in the Music CD Industry*

The emergence of the Internet may have fundamentally altered the mechanisms underlying information exchanges between sellers and end consumers. However, little attention has been given to the impact these mechanisms have on the efficiency of supply chain operations. This paper begins to address this deficiency in the literature by evaluating supply chain transaction efficiency effects from Internet purchases by consumers. It develops and empirically tests a theoretical framework examining the role Internet purchases have in establishing transaction‐efficiency levels in product exchanges involving sellers, placed at different supply chain echelons, and consumers. The theoretical framework integrates the transaction‐cost and internet economics, inter‐organizational information systems, and supply chain management literatures. Empirical testing, via structural equation modeling, is based on archival data in the Internet music CD market. The results show that Internet‐mediated purchases by consumers allow for greater transaction efficiencies when inventory ownership is postponed farther upstream in the supply chain and supply chain echelons are disintermediated. The results also indicate that channel structure configuration, defined by the supply chains' Internet retailing echelon, moderates these transaction efficiency effects.