Robustness to non-normality of various tests for the one-sample location problem

This paper studies the effect of the normal distribution assumption on the power and size of the sign test, Wilcoxon's signed rank test and the t-test when used in one-sample location problems. Power functions for these tests under various skewness and kurtosis conditions are produced for several sample sizes from simulated data using the g-and-k distribution of MacGillivray and Cannon.

International strategy: is it meeting the challenge?

The paper proposes an IS process model comprising inputs, development, outputs and a feedback loop based on performance measurement and its interpretation. The feedback impacts on the inputs and development components. Inputs are comprised of market information. human resources, diversity, value creation and host country environmental factors. Development includes preparation and learning. planning and scrutinising partnerships. anticipating impacts of globalisation and experience effects. Outputs comprise structure, scope of operations, target countries. facility location and positioning. Performance interpretation explains rapid and major changes in IS outputs, such as structure and business unit portfolios, whilst process complexity explains observed output similarities for organisations reacting to similar inputs and suggests an evolutionary approach in their determination.

International strategy : is it meeting the challenge?

International strategy (IS) is the approach by which an organisation's capabilities and resources are directed to generate value utilising the global market's opportunities (and risks). Many of the largest multinationals invest significant resources in their IS, however, the literature does not offer any substantive model for the process. This paper presents a model of the IS process which comprises two parts, the first part is made up of inputs, development and outputs and the second comprises a feedback loop based on organisational performance measurement and its interpretation which impacts on the first part stages of inputs and development. The content of the model is explained and justified using examples of practice. Inputs are comprised of market information, human resources, diversity and value creation and host country environmental factors. Development is comprised of preparation and learning, planning and scrutinising partnerships, anticipating impacts of globalisation, anticipating impacts of technology, location, experience effects, planning competencies, planning for cost effectiveness, scenario planning, planning structures and operations, leadership and ethics. Outputs are comprised of structure, scope of operations, target countries, facility location and positioning. Performance interpretation explains rapid and major changes in IS outputs, such as structure
and business unit portfolios, whilst process complexity explains observed output similarities for organisations reacting to similar inputs and suggests an evolutionary approach in their determination.

Bounded lower subdifferentiability optimization techniques : applications

In this article we develop a global optimization algorithm for quasiconvex programming where the objective function is a Lipschitz function which may have "flat parts". We adapt the Extended Cutting Angle method to quasiconvex functions, which reduces significantly the number of iterations and objective function evaluations, and consequently the total computing time. Applications of such an algorithm to mathematical programming problems inwhich the objective function is derived from economic systems and location problems are described. Computational results are presented.

Análise da acessibilidade urbana para o planejamento da urbanização de interesse social

An analysis of housing issues in the city of Canela (RS, Brazil) has been made in 2008 as part of the development of the Master Plan for Housing. The present paper deals with one component of this analysis, which is the assessment of urban accessibility for low-income population, and its consequences on the treatment of the problem of current shortage of low-income housing and the future demand from population growth until 2020. A three steps method is applied: (i) urban mobility is assessed and mapped on the basis of the road system and the routes of public transport; (ii) accessibility to different urban services, such as public education and health, recreation, consumption and jobs are measured and mapped considering the location of urban facilities, population distribution divided by income and age, and urban mobility; (iii) one map for urban accessibility is produced as a result of the weighted combination of accessibility to different urban facilities. This final urban accessibility map is then overlayed to empty urban lots with size and land value appropriate to low-income housing, and a simulation of their development over the future has been made. The lots with higher accessibility were selected, and the impact of urban development was assessed on the capacity of education facilities. Based on this study, we made some preliminary suggestions for widening places in some schools, the need for a new education facility (location and size) and the extension of public transport for an area with low accessibility.

Effectiveness of staff training programs to manage behavioural problems of dementia

Purpose : Behavioural problems among older people with dementia are a major concern in nursing homes. This study was designed to evaluate the effectiveness of staff training programs on both staff and residents.
Methodology : Two programs (standard dementia care, individualised behaviour therapy) were compared to a control condition. A total of 90 staff and 113 aged care residents participated in the study.
Findings: The results demonstrated an improvement in the self-efficacy of staff who received either training program at post-intervention, and at three- and six-month follow-up. Facility managers also rated an improvement in the performance of staff who received behaviour therapy at post-intervention and at follow-up. There were no changes in behaviours or quality of life for residents in any group.
Implications: Staff education programs may not assist in the management of behavioural symptoms of dementia, but can improve staff attitudes. Other explanations and suggestions for future research are discussed.

Recovery following laparoscopic cholecystectomy in either a 23 hour or an 8 hour facility

Research confirms that laparoscopic cholecystectomy (LC) results in shorter lengths of hospital stay and earlier return to usual activity than the traditional cholecystectomy procedure. Research in this area, however, focuses more on the medical aspects of patient recovery, but very few studies have evaluated how these patients manage their recovery at home or what types of problems they encounter. A total of 28 LC patients were randomly assigned to two groups: (1) 23 h stay (overnight) in a general surgical ward or (2) day procedure unit (DPU) stay. Data was collected by a self-administered Postoperative Symptoms Diary and telephone interview. Results showed no significant difference between the two groups of patients recovery symptoms scores. Problems with mobility, pain and elimination recorded the highest mean scores for both groups of patients. Overnight patients also experienced problems with tiredness and eating. All DPU patients were able to manage their postoperative symptoms, compared to only 44% of patients who had stayed in overnight. Carer assistance was needed with regard to activities of daily living, child care and reassurance. Results showed that with careful selection of patients, LC cases performed as day procedures did not impact at all on the patients' recovery trajectory.

Targeting and measuring housing problems in developing countries through urban texture analysis

Latin-american countries passed from predominantely rural to predominantely urban within few decades. The level of urbanisation in Brazil progressed from 36% in 1950, 50% in 1970, and scalating to 85% in 2005. This rapid transformation resulted in many social problems, as cities were not able to provide appropriate housing and infrastructure for the growing population. As a response, the Brazilian Ministry for Cities, in 2005, created the National System for Social Housing, with the goal to establish guidelines in the Federal level, and build capacity and fund social housing projects in the State and Local levels. This paper presents a research developed in Gramado city, Brazil, as part of the Local Social Housing Plan process, with the goal to produce innovative tools to help social housing planning and management. It proposes and test a methodology to locate and characterise/rank housing defficiencies across the city combining GIS and fractal geometry analysis. Fractal measurements, such as fractal dimension and lacunarity, are able to differentiate urban morphology, and integrated to infrastructure and socio-economical spatial indicators, they can be used to estimate housing problems and help to target, classify and schedule actions to improve housing in cities and regions. Gramado city was divided in a grid with 1,000 cells. For each cell, the following indicators were measured: average income of households, % of roads length which are paved (as a proxy for availability of infrastructures as water and sewage), fractal dimension and lacunarity of the dwellings spatial distribution. A statistical model combining those measurements was produced using a sample of 10% of the cells divided in five housing standards (from high income/low density dwellings to slum's dwellings). The estimation of the location and level of social housing deficiencies in the whole region using the model, compared to the real situation, achived high correlations. Simple and based on easily accessible and inexpensive data, the method also helped to overcome limitations of lack of information and fragmented knowledge of the area related to housing conditions by local professionals.

Parent and family factors associated with service use by young people with mental health problems: a systematic review

AIM: To conduct a systematic review of parent and family factors associated with service use for young people with mental health problems, to inform early intervention efforts aimed at increasing service use by young people. METHODS: A systematic search of academic databases was performed. Articles were included in the review if they had: a sample of young people aged between 5 and 18 years; service use as the outcome measure; one or more parental or family variables as a predictor; and a comparison group of non-service using young people with mental health problems. In order to focus on factors additional to need, the mental health symptoms of the young person also had to be controlled for. Stouffer's method of combining P-values was used to draw conclusions as to whether or not associations between variables were reliable. RESULTS: Twenty-eight articles were identified investigating 15 parental or family factors, 7 of which were found to be associated with service use for a young person with mental health needs: parental burden, parent problem perception, parent perception of need, parent psychopathology, single-parent household, change in family structure and being from the dominant ethnic group for the United States specifically. Factors not found to be related to service use were: family history of service use, parent-child relationship quality, family functioning, number of children, parent education level, parent employment status, household income and non-urban location of residence. CONCLUSIONS: A number of family-related factors were identified that can inform effective interventions aimed at early intervention for mental health problems. Areas requiring further research were also identified.