Physical and psychological outcomes of a supported physical activity program for older carers

This study evaluated health benefits of a supported physical activity program for 116 older carers (mean age 64.4 [SD = 7.9], 85% women). Participants undertook a 6-month center-based physical activity program (strength training, yoga, or Tai Chi). Eighty-eight participants (76%) completed the program. Multivariate repeated-measures ANOVA identified overall significant improvement postintervention (p = .004). Univariate analyses revealed significant improvements for balance, strength, gait endurance, depression, and SF-36 (physical component; p < .05). There was no change in the Zarit Carer Burden Scale (p > .05). Change in performance scores did not differ significantly between those with higher and lower attendance at classes, although there was significantly greater improvement in gait endurance and balance (p < .05) in those attending classes run twice weekly than in those attending once-weekly classes. In conclusion, a carer physical activity program, providing additional carer support to facilitate participation, can achieve high levels of involvement by carers and significant health benefits.     

Interactions among fungal endophytes, grasses and herbivores

The interaction between two species often depends on the presence or absence of a third species. One widespread three-species interaction involves fungal endophytes infecting grasses and the herbivores that feed upon them. The endophytes are allied with the fungal family Clavicipitaceae and grow systemically in intercellular spaces in above-ground plant tissues including seeds. Like relatedClaviceps species, the endophytes produce a variety of alkaloids that make the host plants toxic or distasteful to herbivores. A large number of grass species are infected, especially cool-season grasses in temperate areas. Field and laboratory studies have shown that herbivores avoid infected plants in choice trials and suffer increased mortality and decreased growth on infected grasses in feeding experiments. Resistance to herbivores may provide a selective advantage to infected plants in competitive interactions with noninfected plants. Recent studies have shown that differential herbivory can reverse competitive hierarchies among plant species. Both endophyte-infected and noninfected tall fescue grass (Festuca arundinacea) are outcompeted by orchardgrass (Dactylis glomerata) in the absence of insect herbivory. However, when herbivores are present infected tall fescue outcompetes orchardgrass. These results suggest that the frequency of infection in grass species and grassland communities will increase over time. Several studies are reviewed illustrating increases in infection frequency within grass populations subject to herbivore pressure. Endophytic fungi may be important regulators of plant-herbivore interactions and so indirectly affect the structure and dynamics of plant communities.     

Emergent Marketing Strategies and Performance: The Effects of Market Uncertainty and Strategic Feedback Systems

Although many process‐based studies appear in the strategic management literature, little attention has been devoted to the formation process of marketing strategies. Drawing on enactment and information‐processing theories, this study views the external environment as a source of information (i.e. enacted) and organizations as information‐processing entities. We propose a conceptual framework of antecedents and market performance consequences of emergent marketing strategies and test it with a sample of 214 UK enterprises. The results suggest that dimensions of market uncertainty (i.e. dynamism and complexity) and strategic feedback systems influence the formation of emergent marketing strategy. Furthermore, the data reveal that market uncertainty aspects condition the association between emergent marketing strategies and market performance in different ways. These findings provide new insights into how emergent marketing strategies evolve and influence organizational outcomes.     

User-centred responses to child sexual abuse: the way forward?

Two parallel surveys were carried out based in the north-east of England and Cumbria: one ascertaining statutory social work services provided for child and adult survivors of sexual abuse, the other drawing upon the perceptions of adult survivors of child sexual abuse about existing and desirable forms of provision for adults and children. The surveys indicate the need for greater genuine partnership between service users and statutory agencies in the field of child sexual abuse, similar to that which is being pioneered in the field of adult care and disability. A community-orientated response to sexual abuse, centred on service-users, is required if one of the largest social problems facing us today is to be effectively challenged.     

Mutual benefit societies in Hungary, 1830-1941

In Hungary for most of the nineteenth century mutual benefit societies played a key role in providing various social groups with aid in case of illness, accident, disability or death. The majority were linked to the burgeoning working-class movement and were voluntary associations whose members had no other recourse in times of adversity. Hungary was undergoing transformation in the nineteenth century. Changes in goods production and the craft guilds accelerated the establishment of workers'benefit societies, and so did the lack of a coherent system of social insurance in the new industrial order. They grew in tandem with the expansion of Hungary's economy and the return of constitutional government in 1867, and flourished from the 1870s to the decade preceding the First World War. Austria and Germany provided theoretical justifications and practical models. By the 1890s voluntary mutual benefit societies faced increasing competition from the State. As the economy and social structures evolved, successive governments sponsored their own insurance programmes. By the turn of the century, private companies were also offering life and accident insurance and the appeal of mutual benefit societies to both workers and the middle class diminished. Between the two world wars, they continued to serve a substantial segment of the population.     

The Association Between Perceived Spirituality, Religiosity, and Life Satisfaction: The Mediating Role of Self-Rated Health

This study examined the mediating role of self-perceived health between perceived spirituality, religiosity, and life satisfaction among a stratified, random sample of college students, while controlling for gender. Although both models displayed excellent fit criteria, the perceived spirituality and life satisfaction model was fully mediated by self-perceived health χ² (n=459, 4) = 1.64, p=0.80, CFI =0.99, TLI=0.99), and the perceived religiosity and life satisfaction model was partially mediated by self-perceived health χ² (n=459, 10) = 22.29, p=0.01 CFI = 0.99, TLI = 0.99). Both models were equal for men and women. Students who describe themselves as spiritual (or religious) are likely to report greater self-perceived health and greater self-perceived health likely influences life satisfaction for both men and women. Results preliminarily support the contention that life satisfaction is related to differing reported health status, whether physical or mental, and that life satisfaction may be influenced by religiosity and spirituality engagement. Implications for colleges and universities are discussed.     

State estimation for nonlinear state-space transmission models of tuberculosis

Given the high prevalence of tuberculosis (TB) and the mortality rate associated with the disease, numerous models, such as the Gammaitoni and Nucci (GN) model, were developed to model the risk of transmission. These models typically rely on a quanta generation rate as a measurement of infectivity. Since the quanta generation rate cannot be measured directly, the unique contribution of this work is to develop state estimators to estimate the quanta generation rate from available measurements. To estimate the quanta generation rate, the GN model is adapted into an augmented single-room GN model and a simplified two-room GN model. Both models are shown to be observable, i.e., it is theoretically possible to estimate the quanta generation rate given available measurements. Kalman filters are used to estimate the quanta generation rate. First, a continuous-time extended Kalman filter is used for both adapted models using a simulation and measurement sampling rate of 60 s. Accurate quanta generate rate estimates are achieved in both cases. A more realistic scenario is also considered with a measurement sampling rate of one day. For these estimates, a hybrid extended Kalman filter (HEKF) is used. Accurate quanta generation rate estimates are achieved for the more realistic scenario. Future work could potentially use the HEKFs, the adapted models, and real-time measurements in a control system feedback loop to reduce the transmission of TB in confined spaces such as hospitals.     

The intersections of race,immigrant status,and university confirmations in Toronto

Although the number of students attending university has been steadily increasing over the past 20 years, discrepancies remain across racialized student groups. Students who immigrate to Canada also face a number of barriers to university participation. However, few studies investigate variations in university participation across racialized immigrant student groups. We draw on an intersectional approach to analyze student data from the Toronto District School Board. We employ multilevel logistic regression to examine if there are interactive effects of being both racialized and having an immigrant status on confirming a university enrollment. Looking at self-identified race and immigrant status of students in combination reveals that there are important differences in the likelihood of confirming and offer of university admission between several self-identified racial categories, depending on if they were foreign-born.     

MODELING DEMAND DURING LEAD TIME*

This paper treats some of the important considerations in constructing an analytical model for the distribution of demand during lead time. It presents a formal model that can be developed along one of two lines. The first has order size and order intensity leading to a compound distribution of period demand, then period demand and lead time giving rise to a compound distribution of demand during lead time. The second has order intensity and lead time giving rise to a compound distribution of lead-time order intensity, then lead-time order intensity and order size leading to a compound distribution of demand during lead time. The paper also condenses the state of the art in a table and proposes some simple classification schemes that could help researchers extend that state of the art.