L'important,C'est Les Lunettes

Applying mathematics to solve any problem inevitably grants an aura of objectivity and truth to the results generated through such methodology. However, mathematics remains a means of elucidation that functions within strict constraints of tractability and stylization. Despite the aesthetics of models and the precision of computation, mathematical representations are but a shadow of the reality they seek to characterize. Nonetheless, because mathematics' pure form hides its own limitations, it becomes a privileged site of scholastic reason and, at the same time, of symbolic violence, two notions that Bourdieu theorized in his work. Despite this handicap, Bourdieu recognized the importance of formalizing tools such as those derived from mathematics. He thus devised many strategies to take advantage of their power of elucidation while avoiding the distortions and dogmatic stance they unavoidably bring about. This paper examines these strategies in detail to further inspire the identification of a number of reflexive approaches that can deflect the potential symbolic violence of mathematical reasoning. In this analysis, particular attention is given to the specific needs of practitioners engaged in mathematical formulation such as economists, statisticians, operations researchers and other quantitative scientists. This process of reflexive discovery is then used to enrich the notion of ‘specific intellectual’ that Foucault introduced and that Bourdieu further specified and ‘lived’. The paper concludes by foregrounding the perhaps unexpected moral dimensions of applied mathematics, a discipline that otherwise often appear distant and esoteric.     

Mutual Aid: A Contribution to Best-Practice Social Work

This keynote speech, delivered in French and translated to English with minor adjustments for publication, presents some of the author's ideas about mutual-aid practice as best-practice social work. The author discusses the etiology and centrality of mutual aid in social work with groups, presents five characteristics of mutual-aid practice that reflect best-practice social work and identifies four key characteristics—joy in sharing, faith, courage, and curiosity—of mutual-aid practitioners. Similarities between mutual-aid practice and evidence-based group work, practice evaluation and participatory-action research are discussed as well. The author presents group work as inherently evidence based and challenges the idea that subjective measures alone may not be valid in reaching this determination.     

Thinking outside the box by looking inside the box: Extending the cognitive revolution in leadership research

Follower and leader cognitions play critical roles in many organizational phenomena. In this review, we report and reflect on a decade of cognitive leadership research. Following a brief introduction, the review is divided into two sections—one devoted to individual and dyadic cognition, and the other to collective cognition. We identified three central themes for each section. For individual and dyadic cognition, we identified metacognitive processes and leadership, implicit leadership theories (ILTs), and network based models of ILTs as central themes. For collective cognition, we identified charisma, organizational performance and sensemaking, and transformation and change as central themes. Our goal in this review was to uncover important underlying assumptions of selected studies to illuminate more clearly the path of cognitive leadership research over the past 10 years and its potential paths over the next ten years.     

Multiple criteria decision analysis of treatment and land-filling technologies for waste incineration residues

In this paper, we present a real-world case realized in Switzerland on behalf of the federal agency in charge of the waste policy. The incineration of urban wastes generates hazardous residues that need specific treatment and/or land-filling technologies. The variety of local situations and appraisals led to the choice of very different solutions. Moreover, proponents were keen to propose new technologies. The purpose of this study was to provide the background for a national policy that would apply to all future projects.     

Estimation of k-Factor GIGARCH Process: A Monte Carlo Study

In this article, we discuss the parameter estimation for a k-factor generalized long-memory process with conditionally heteroskedastic noise. Two estimation methods are proposed. The first method is based on the conditional distribution of the process and the second is obtained as an extension of Whittle's estimation approach. For comparison purposes, Monte Carlo simulations are used to evaluate the finite sample performance of these estimation techniques, using four different conditional distribution functions.     

Kinect-based choice reaching and stepping reaction time tests for clinical and in-home assessment of fall risk in older people: a prospective study

Background

Quick protective reactions such as reaching or stepping are important to avoid a fall or minimize injuries. We developed Kinect-based choice reaching and stepping reaction time tests (Kinect-based CRTs) and evaluated their ability to differentiate between older fallers and non-fallers and the feasibility of administering them at home.

Methods

A total of 94 community-dwelling older people were assessed on the Kinect-based CRTs in the laboratory and were followed-up for falls for 6 months. Additionally, a subgroup (n?=?20) conducted the Kinect-based CRTs at home. Signal processing algorithms were developed to extract features for reaction, movement and the total time from the Kinect skeleton data.

Results

Nineteen participants (20.2 %) reported a fall in the 6 months following the assessment. The reaction time (fallers: 797?±?136 ms, non-fallers: 714?±?89 ms), movement time (fallers: 392?±?50 ms, non-fallers: 358?±?51 ms) and total time (fallers: 1189?±?170 ms, non-fallers: 1072?±?109 ms) of the reaching reaction time test differentiated well between the fallers and non-fallers. The stepping reaction time test did not significantly discriminate between the two groups in the prospective study. The correlations between the laboratory and in-home assessments were 0.689 for the reaching reaction time and 0.860 for stepping reaction time.

Conclusion

The study findings indicate that the Kinect-based CRT tests are feasible to administer in clinical and in-home settings, and thus represents an important step towards the development of sensor-based fall risk self-assessments. With further validation, the assessments may prove useful as a fall risk screen and home-based assessment measures for monitoring changes over time and effects of fall prevention interventions.

     

Relationship between sarcopenia and fracture risks in obese postmenopausal women

It is known that obesity is inversely correlated with fracture risk. It remains unclear if a low muscle mass (sarcopenia) modulates the relationship between obesity and bone mass density. Twenty-seven obese women were matched for total fat mass (+/- 0.5 kg) and age (+/- 4 yrs) and divided in 3 equal groups: class II sarcopenic, class I sarcopenic, and nonsarcopenic. Body composition (DXA) and dietary intake were measured. Our results suggest that obesity may offer some protection against osteoporosis, even in sarcopenic postmenopausal women. However, further studies are needed to examine the actual implication of these results on a clinical standpoint.