Classification of cyclical time series using complex demodulation

A new and innovative procedure based on time varying amplitudes for the classification of cyclical time series is proposed. In many practical situations, the amplitude of a cyclical component of a time series is not constant. Estimated time varying amplitudes obtained through complex demodulation of the time series are used as the discriminating variables in classical discriminant analysis. The aim of this paper is to demonstrate through simulation studies and applications to well-known data sets, that time varying amplitudes have very good discriminating power and hence their use in classical discriminant analysis is a simple alternative to more complex methods of time series discrimination.     

Unmet health care needs of people with disabilities: population level evidence

The present study examined population level data on unmet needs for adults with physical, sensory and cognitive disabilities, using the National Population Health Survey. The study revealed that disabled adults (aged 20–64) reported more than three times as many unmet health care needs as their non‐disabled counterparts. Even after controlling for the effects of age, gender and poor health, disability had a significant effect on the perception of unmet needs, particularly disabilities associated with pain, hearing impairment and emotional problems. The greatest deterrent to receiving needed services among individuals with disabilities was cost. Despite being publicly funded and thereby presumably equally accessible to all, the health care system in Canada fails to meet the needs of some of its most vulnerable constituents – adults with disabilities.     

The ruins of Managua vieja: the use of expressive photography in urban ethnography

This article proposes a method of conducting urban visual work – a practice-led visual study in which researcher-generated expressive photography explores the ‘city-as-archive’ (Hetherington 2013) and contributes to the urban visual archive. The photographs used in this article focus upon the social world of material remnants in the setting of the old downtown of Managua, Nicaragua. The aim of the article is four-fold: to suggest the epistemological gains of expressive photography, to discuss the methodology and style, to present the use of these images in an urban visual ethnography of Managua and to address related ethical concerns. Although expressive photographs are used to some extent by scholars, there is a noticeable lack of discussion of the method and empirical examples in urban visual studies. In this article, I propose intentionally using expressive photography to convey the subjective and affective knowledge that is generally not communicated by more conventional, ‘realist’ documentary visual techniques. Moving into a more explicit conversation of the work process, I point out three arenas for inquiry, for which this method can be useful. I detail my own visual ethnographic practice, and present my primary visual aims in three image clusters: expressive photography in conjunction with historical images, theorising the oscillation between absence and presence and visually interpreting the vernacular design of the ruinscape. The article concludes with a consideration of ‘ruin romance’ as an ethical concern, as well as some reflections over perceived difficulties in using this method as a means of doing academic research.     

State of the science on prevention of elder abuse and lessons learned from child abuse and domestic violence prevention: Toward a conceptual framework for research

ABSTRACT

The goal of this review is to discuss the state of the science in elder abuse prevention. Findings from evidence-based programs to reduce elder abuse are discussed, drawing from findings and insights from evidence-based programs for child maltreatment and domestic/intimate partner violence. A conceptual measurement model for the study of elder abuse is presented and linked to possible measures of risk factors and outcomes. Advances in neuroscience in child maltreatment and novel measurement strategies for outcome assessment are presented.     

Civil Society Organizations in the Informal Settlements of Buenos Aires: Service Providers and Forces for Change

The objective of this paper is to analyze the historical roots and contribution to human development of civil society organizations in marginalized communities based on fieldwork undertaken in seven informal settlements of the City of Buenos Aires, Argentina. The paper provides evidence of a dense network of organizations whose principal function is the provision of social services, especially food assistance, through a complementary relationship with the state. The current effectiveness of the settlements’ representative organizations—the principal vehicles through which community members voice their collective demands—is limited by a mix of factors intimately related to civil society–state relations, including irregularities in election processes, conflicts between organizations, and lack of transparency in the allocation of public resources. The paper concludes that true empowerment of these communities to act as a unified force for change requires the strengthening of neighborhood organizations and greater government openness to civil society participation in public decision-making processes.     

Effect of mortgage indebtedness on health of U.S. homeowners

This paper examines the effect of excessive mortgage indebtedness on health among homeowners using nine waves of the Health and Retirement Study from 1992 to 2008. Health status is measured by subjective well-being, number of depressive symptoms, and incidence of hypertension. Using average annual state-level home prices as an instrument, we attempt to identify the causal effect in an panel IV framework. Results from the panel IV estimations suggest that having a high mortgage loan to home value (LTV), defined as LTV at or above 80 %, leads to more depressive symptoms and a higher incidence of hypertension, but has no effect on subjective well-being. Since the results from panel estimations did not show that debt affects health, whether the panel IV results demonstrate a causal relationship depends critically on the exclusion assumption.     

Do Marriage and Cohabitation Provide Benefits to Health in Mid-Life? The Role of Childhood Selection Mechanisms and Partnership Characteristics Across Countries

Extensive research has found that marriage provides health benefits to individuals, particularly in the U.S. The rise of cohabitation, however, raises questions about whether simply being in an intimate co-residential partnership conveys the same health benefits as marriage. Here, we use OLS regression to compare differences between partnered and unpartnered, and cohabiting and married individuals with respect to self-rated health in mid-life, an understudied part of the lifecourse. We pay particular attention to selection mechanisms arising in childhood and characteristics of the partnership. We compare results in five countries with different social, economic, and policy contexts: the U.S. (NLSY), U.K. (UKHLS), Australia (HILDA), Germany (SOEP), and Norway (GGS). Results show that living with a partner is positively associated with self-rated health in mid-life in all countries, but that controlling for children, prior separation, and current socio-economic status eliminates differences in Germany and Norway. Significant differences between cohabitation and marriage are only evident in the U.S. and the U.K., but controlling for childhood background, union duration, and prior union dissolution eliminates partnership differentials. The findings suggest that cohabitation in the U.S. and U.K., both liberal welfare regimes, seems to be very different than in the other countries. The results challenge the assumption that only marriage is beneficial for health.     

INTERNATIONAL TECHNOLOGY AND OPERATIONS MANAGEMENT: RESOURCE TOOLKIT FOR RESEARCH AND TEACHING

Increasing globalization has affected the way that firms are managed today. While its impact on competitive strategy, marketing, and finance has been well accepted and well studied, its effect on the firm's technology and operations has not. This paper provides resources for research and teaching in international technology and operations management (itom). Included are an extensive bibliography of papers and an overview of large-scale survey research initiatives in the area. By bringing together and categorizing this body of work, we hope to facilitate further work in the area and to help define ITOM'S scope.     

Challenges to care coordination posed by the use of multiple health IT applications

Coordinating care for hospitalized patients requires the use of multiple sources of information. Using a macroergonomic framework (i.e. the work system model), we conducted interviews and observations of care managers involved in care coordination across transitions of care. When information is distributed across multiple health IT applications, care managers experience a range of challenges, including organizational barriers, technology design problems, skills and knowledge issues, and task performance demands (i.e. issues related to individual information processing and management and sharing of information). These challenges can be used as a checklist to evaluate the proposed IT infrastructure that will allow the integration of multiple health IT applications and, therefore, support coordination across transitions of care.