Abnormal oscillation modes in a waning light bridge

A sunspot acts as a waveguide in response to the dynamics of the solar interior; the trapped waves and oscillations could reveal its thermal and magnetic structures. We study the oscillations in a sunspot intruded by a light bridge, the details of the oscillations could reveal the fine structure of the magnetic topology. We use the Solar Dynamics Observatory/Atmospheric Imaging Assembly data to analyse the oscillations in the emission intensity of light bridge plasma at different temperatures and investigate their spatial distributions. The extreme ultraviolet emission intensity exhibits two persistent oscillations at five-minute and sub-minute ranges. The spatial distribution of the five-minute oscillation follows the spine of the bridge; whereas the sub-minute oscillations overlap with two flanks of the bridge. Moreover, the sub-minute oscillations are highly correlated in spatial domain, however, the oscillations at the eastern and western flanks are asymmetric with regard to the lag time. In the meanwhile, jet-like activities are only found at the eastern flank. Asymmetries in forms of oscillatory pattern and jet-like activities \textbf{are} found between two flanks of a granular light bridge. Based on our study and recent findings, we propose a new model of twisted magnetic field for a light bridge and its dynamic interactions with the magnetic field of a sunspot.Comment: 5 figures, Accepted version in A&

The new way forward: Using collaborations and partnerships for greater efficiency and impact

This paper uses seven short case studies of nonprofit housing and community development organizations to explore three different collaborative strategies that increase their efficiency and impact. These case studies include both recent and long-standing partnerships in affordable housing, community development finance, neighborhood stabilization, and transit-oriented development. It concludes with recommendations based on the examples, including effective strategies for successful innovation, collaboration, and partnership formation.Housing ; Community development

Parliamentary Voting Procedures: Agenda Control, Manipulation, and Uncertainty

We study computational problems for two popular parliamentary voting procedures: the amendment procedure and the successive procedure. While finding successful manipulations or agenda controls is tractable for both procedures, our real-world experimental results indicate that most elections cannot be manipulated by a few voters and agenda control is typically impossible. If the voter preferences are incomplete, then finding which alternatives can possibly win is NP-hard for both procedures. Whilst deciding if an alternative necessarily wins is coNP-hard for the amendment procedure, it is polynomial-time solvable for the successive one

Psychological Adjustment and Caregive Attributes in Children Referred to Contact House

Child abuse and neglect (CAN) encompasses a heterogenous group of adverse practices with devastating personal, social, educational, health, legal and welfare consequences. The term child abuse and neglect covers four types maltreatment: physical abuse, emotional abuse, sexual abuse, and neglect, with many children experiencing a combination of these types. Australian child protection notifications have more than doubled in the 5-year period to 2004. Of most concern is that, of all the Australian States and Territories, Queensland has the highest rate of substantiated cases with 14.1 per 1,000 children (AIHW, 2006). Childhood abuse and neglect can have profound short- and long-term effects. Children with a history of abuse and neglect have been shown to experience insecure attachment, developmental delays, diminished social skills, violent behaviour and learning problems. Previous studies have also found that abused and neglected children frequently experience a higher incidence of a diverse range of adverse mental health outcomes including helplessness and sadness, lowered self-esteem and post traumatic stress disorder. However, relatively few studies have examined the psychological adjustment of children in more immediate terms especially within an Australian context. Furthermore, adults experiencing CAN during childhood frequently exhibit diverse psychopathologies. The variability in adverse consequences suggests the existence of mediating and moderating factors influencing the level of distress experienced by children. While associations have been made between factors surrounding the type of abuse, the child’s age and gender and negative outcomes, little is known about the role of the child’s non-offending caregiver and the relationship between caregiver attributes and the level of distress experienced by the child. A primary aim of this study was to investigate caregiver attributes and the psychological adjustment of children referred to a non-government treatment centre. This specific aims were: (i) to describe the psychological adjustment of children who have experienced abuse and/or neglect (ii) to compare the psychological functioning of children presenting for treatment with a community sample of children (iii) to describe the level of psychosocial functioning of the caregivers in the clinical group across a range of psychosocial and parenting practice variables and (iv) to explore the relationship between demographic variables, factors relating to the abuse and neglect, and caregiver variables, which may predict, mediate, or moderate the child’s psychological adjustment. In addition the study aimed to establish a database for future research into treatment outcomes. Through the inclusion of a comparison community sample, this study provided evidence to complement existing research and develop a more complete picture of families living with and without CAN. The findings also offer preliminary evidence regarding the effectiveness of treatment and underscore the need for ongoing evaluation of service outcomes to optimise the quality of life for children and families affected by CAN

Constraining Coronal Heating: Employing Bayesian Analysis Techniques to Improve the Determination of Solar Atmospheric Plasma Parameters

One way of revealing the nature of the coronal heating mechanism is by comparing simple theoretical one dimensional hydrostatic loop models with observations at the temperature and/or density structure along these features. The most well-known method for dealing with comparisons like that is the $\chi^2$ approach. In this paper we consider the restrictions imposed by this approach and present an alternative way for making model comparisons using Bayesian statistics. In order to quantify our beliefs we use Bayes factors and information criteria such as AIC and BIC. Three simulated datasets are analyzed in order to validate the procedure and assess the effects of varying error bar size. Another two datasets (Ugarte-Urra et al., 2005; Priest et al., 2000) are re-analyzed using the method described above. In one of these two datasets (Ugarte-Urra et al., 2005), due to the error estimates in the observed temperature values, it is not posible to distinguish between the different heating mechanisms. For this we suggest that both Classical and Bayesian statistics should be applied in order to make safe assumptions about the nature of the coronal heating mechanisms