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Filter for Car Tracking Based on Acceleration and Steering Angle
The motion of a car is described using a stochastic model in which the driving processes are the steering angle and the tangential acceleration. The model incorporates exactly the kinematic constraint that the wheels do not slip sideways. Two filters based on this model have been implemented, namely the standard EKF, and a new filter (the CUF) in which the expectation and the covariance of the system state are propagated accurately. Experiments show that i) the CUF is better than the EKF at predicting future positions of the car; and ii) the filter outputs can be used to control the measurement process, leading to improved ability to recover from errors in predictive tracking
Preparing for Marriage: What Pastoral Marital Counselors Should Know About Religious Belief, Psychological Health, and Marital Outcome
Sports concussion management using Facebook: A feasibility study of an innovative adjunct "iCon
Context: Sports concussion is currently the focus of much international attention. Innovative methods of facilitating management following this injury need to be investigated to assist athletic trainers. Objective: The objective of this study was to investigate the feasibility of using a Facebook concussion management program termed "iCon" ("interactive concussion management") to facilitate the safe return to play (RTP) of young persons following a sports concussion. Design: This qualitative study was designed as a single-group observational feasibility study using programme evaluation methodology, with the focus on gauging the suitability of the Facebook management strategy for a potential larger study. Setting: iCon involved a Facebook group containing interactive elements, with moderation and support from trained healthcare professionals. Patients or Other Participants: Eleven participants completed the study (n=9 males, n=2 females), and ranged from 18 to 28 years old. Data Collection and Analysis: The study was conducted over a three-month period, with participant questionnaires administered pre- and post-intervention. The primary focus was on the qualitative experiences of the participants in the study, and the effect of iCon on their RTP. Usage data was also collected during the study. Results: At the completion of the study, all participants (100%) stated that they would recommend an intervention such as iCon to others, with their supporting quotes all indicating that iCon has the potential to improve the management of concussion amongst this cohort. The majority of participants (n=9 or 82%) stated they were better informed with regards to their RTP because of participating in iCon. Conclusions: This interactive adjunct to traditional concussion management was appreciated amongst this particular participant group and indicated feasibility for a future, larger study of iCon. Athletic trainers should consider the role that multimedia technologies may play in assisting with the management of sports concussion
Introduction
On August 19, 1994, the sponsorship of this Law School was transferred from the University of Puget Sound to a new parent institution, Seattle University, and the school became the Seattle University School of Law. It is now our great pleasure to welcome all past subscribers and supporters to the first issue of the Seattle University Law Review. Seattle University brings to the Law School the tradition of excellence of the Jesuit-sponsored universities and their law schools throughout the nation. From Fordham and Georgetown to Santa Clara and the Loyolas, these law schools have attained uniform reputations of quality and national prominence. Under its new sponsorship, the Seattle University School of Law will maintain the fine teaching and scholarly faculty, and the model clinical and legal writing programs that have brought it accolades in the past. The new partnership with Seattle University provides institutional support and opportunities for our law programs to flourish and to mesh with the other interdisciplinary activities and graduate programs of Seattle University. This merger of a thriving law school with an established and respected full service university is unprecedented, and is full of promise for both institutions. The Law Review will maintain its fine tradition of offering a balance of Symposia Issues, Articles, Notes and Comments that are timely and relevant for readers in both the northwest and the national legal community. We shall appreciate your continued support of the Seattle University Law Review and we promise you a publication that will be of continued and expanded service
A note on the algebraic growth rate of Poincar\'e series for Kleinian groups
In this note we employ infinite ergodic theory to derive estimates for the
algebraic growth rate of the Poincar\'e series for a Kleinian group at its
critical exponent of convergence.Comment: 8 page
Exploring experiential differences in everyday activities – A focused ethnographic study in the homes of people living with memory-led Alzheimer's disease and posterior cortical atrophy
Background
Supporting ageing in place, quality of life and activity engagement are public health priorities for people living with dementia, but little is known about the needs and experiences of community-dwelling people with rarer forms of dementia with lesser known symptoms. Posterior cortical atrophy (PCA) is a rare form of dementia usually caused by Alzheimer's disease but which is characterised by diminished visual processing (rather than a dominant memory problem), which poses challenges for maintaining independence and accessing appropriate support.
Methods
This study used a comparative qualitative design and focussed ethnographic methods to explore experiential differences in activity engagement for 10 people with the most common, memory-led presentation of Alzheimer's disease and 10 people with posterior cortical atrophy within their everyday home environments.
Results
While the data collection revealed much rich variation in individual and contextual factors, some tentative high-level differences in the experiences of everyday activities could be drawn out, seemingly attributable to the different diagnoses' differing dominant symptoms. These included people with posterior cortical atrophy being less likely to use environmental cues to initiate activities, and more likely to withhold from asking for support because of preserved insight into the impact of this on carers. This lack of initiation of activities could be misinterpreted as apathy. People with posterior cortical atrophy also were discouraged from engaging in activities by disorientation within the home, and difficulties localising, identifying and manipulating objects. People with the more common, memory-led presentation of Alzheimer's disease exhibited more memory-based difficulties with engaging with activities such as forgetting planned activities, where to locate the items required for an activity and the steps involved. Despite these distinct symptom-led challenges, all participants and their family members demonstrated resourcefulness and resilience in making creative adaptations to support continued engagement in everyday activities, supporting the widely reported management strategies of people with dementia of the Alzheimer's type more generally.
Conclusions
These findings offer helpful insights into some the differing impacts dementia related visual and memory impairments can have on everyday activity engagement, which will be helpful for others navigating these challenges and the health and social care practitioners working with people affected by these conditions. The findings also highlight the vast individual variation in the multitude of individual and contextual factors involved in everyday activity engagement, and suggest important areas for future work utilising methods which are similarly high in ecological validity and accessibility as the home-based focussed ethnographic methods utilised here
Radon--Nikodym representations of Cuntz--Krieger algebras and Lyapunov spectra for KMS states
We study relations between --KMS states on Cuntz--Krieger algebras
and the dual of the Perron--Frobenius operator .
Generalising the well--studied purely hyperbolic situation, we obtain under
mild conditions that for an expansive dynamical system there is a one--one
correspondence between --KMS states and eigenmeasures of
for the eigenvalue 1. We then consider
representations of Cuntz--Krieger algebras which are induced by Markov fibred
systems, and show that if the associated incidence matrix is irreducible then
these are --isomorphic to the given Cuntz--Krieger algebra. Finally, we
apply these general results to study multifractal decompositions of limit sets
of essentially free Kleinian groups which may have parabolic elements. We
show that for the Cuntz--Krieger algebra arising from there exists an
analytic family of KMS states induced by the Lyapunov spectrum of the analogue
of the Bowen--Series map associated with . Furthermore, we obtain a formula
for the Hausdorff dimensions of the restrictions of these KMS states to the set
of continuous functions on the limit set of . If has no parabolic
elements, then this formula can be interpreted as the singularity spectrum of
the measure of maximal entropy associated with .Comment: 30 pages, minor changes in the proofs of Theorem 3.9 and Fact
The Asymptotic distribution of circles in the orbits of Kleinian groups
Let P be a locally finite circle packing in the plane invariant under a
non-elementary Kleinian group Gamma and with finitely many Gamma-orbits. When
Gamma is geometrically finite, we construct an explicit Borel measure on the
plane which describes the asymptotic distribution of small circles in P,
assuming that either the critical exponent of Gamma is strictly bigger than 1
or P does not contain an infinite bouquet of tangent circles glued at a
parabolic fixed point of Gamma. Our construction also works for P invariant
under a geometrically infinite group Gamma, provided Gamma admits a finite
Bowen-Margulis-Sullivan measure and the Gamma-skinning size of P is finite.
Some concrete circle packings to which our result applies include Apollonian
circle packings, Sierpinski curves,
Schottky dances, etc.Comment: 31 pages, 8 figures. Final version. To appear in Inventiones Mat
A systematic review and psychometric evaluation of resilience measurement scales for people living with dementia and their carers
Psychometrically sound resilience outcome measures are essential to establish how health and care services or interventions can enhance the resilience of people living with dementia (PLWD) and their carers. This paper systematically reviews the literature to identify studies that administered a resilience measurement scale with PLWD and/or their carers and examines the psychometric properties of these measures. Electronic abstract databases and the internet were searched, and an international network contacted to identify peer-reviewed journal articles. Two authors independently extracted data. They critically reviewed the measurement properties from the available psychometric data in the studies, using a standardised checklist adapted for purpose. Fifty-one studies were included in the final review, which applied nine different resilience measures, eight developed in other populations and one developed for dementia carers in Thailand. None of the measures were developed for use with people living with dementia. The majority of studies (N = 47) focussed on dementia carers, three studies focussed on people living with dementia and one study measured both carers and the person with dementia. All the studies had missing information regarding the psychometric properties of the measures as applied in these two populations. Nineteen studies presented internal consistency data, suggesting seven of the nine measures demonstrate acceptable reliability in these new populations. There was some evidence of construct validity, and twenty-eight studies hypothesised effects a priori (associations with other outcome measure/demographic data/differences in scores between relevant groups) which were partially supported. The other studies were either exploratory or did not specify hypotheses. This limited evidence does not necessarily mean the resilience measure is not suitable, and we encourage future users of resilience measures in these populations to report information to advance knowledge and inform further reviews. All the measures require further psychometric evaluation in both these populations. The conceptual adequacy of the measures as applied in these new populations was questionable. Further research to understand the experience of resilience for people living with dementia and carers could establish the extent current measures -which tend to measure personal strengths -are relevant and comprehensive, or whether further work is required to establish a new resilience outcome measure
Peer support for people living with rare or young onset dementia: An integrative review
Objectives: The aim of this integrative review was to identify and synthesize the literature on peer
support interventions for people living with or caring for someone with a rare or young onset dementia.
Design: A literature search of articles was performed using the Nipissing University Primo search system, a central index that enables simultaneous searches across databases which included MEDLINE (PubMed), Web of Science, PsycINFO, CINAHL, Sociological Abstracts, Cochrane Library.
Results: The eleven papers that met the inclusion criteria spanned eighteen years and from five countries. Studies reported on peer support programs that were either hospital-based (n = 6) or community-based (n = 4), and were predominantly led by disciplines in the health sciences. Only one study did not involve delivering services. There was a range of methodological quality within the studies included in the review. Further analysis and synthesis led to the identification of three overarching peer support themes. These included: (1) peers as necessarily part of social support interventions; (2) a theoretical portmanteau; and (3) dementia spaces and relationality.
Conclusion: Consistent with a much larger body of work examining peer involvement in social interventions, this review reinforced the valuable contribution of peers. A full understanding of the mechanisms of change was not achieved. Notwithstanding, the issue of studies neglecting to sufficiently conceptualize and describe interventions is an important one – drawing attention to the need to continue to explore varied delivery, including co-produced models, and more effective evaluation strategies to inform the dementia care sector
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