Transient Excitation of an Elastic Half-Space by a Point Load Traveling on the Surface

The propagation of transient waves in a homogeneous, isotropic, linearly elastic half-space excited by a traveling normal point load is investigated. The load is suddenly applied and then it moves rectilinearly at a constant speed along the free surface. The displacements are derived for the interior of the half-space and for all load speeds. Wave front expansions are obtained from the exact solution, in addition to results pertaining to the steady-state displacement field. The limit case of zero load speed is considered, yielding new results for Lamb's point load problem

Relatives’ emotional involvement moderates the effects of family therapy for bipolar disorder.

The “critical comments” dimension of the expressed emotion (EE) construct has been found to predict the illness course of patients with bipolar disorder, but less is known about the “emotional overinvolvement” (EOI) component. The goal of this study was to evaluate whether relatives’ observed appropriate and inappropriate emotional involvement (intrusiveness, self-sacrifice, and distress about patients’ well-being) moderated the effectiveness of a family-based intervention for bipolar disorder

Family-Focused Treatment for Children and Adolescents with Bipolar Disorder

ABSTRACT The course of bipolar disorder in children and adolescents is highly recurrent and impairing. This article describes the adaptation of family-focused treatment (FFT) for children and adolescents with bipolar disorder. FFT is given in 21 sessions over 9 months, and is usually initiated during the recovery period following an acute episode of depression or (hypo)mania. The treatment consists of an engagement phase followed by psychoeducation, communication enhancement training, and problem-solving skills training. Results of randomized trials in adults and adolescents find that patients with bipolar disorder who receive FFT and pharmacotherapy recover from episodes more quickly and have longer periods of sustained remission than patients who receive briefer forms of therapy and pharmacotherapy. The application of FFT to youth who are genetically at risk for bipolar disorder is described. Problems in disseminating empirically supported family interventions in community settings are discussed

Near-field transient waves in anisotropic elastic plates for two and three dimensional problems

The formal solutions to a class of non-axisymmetric problems involving a transversely isotropic elastic plate are derived. The Cagniard-deHoop method of inversion is used to Obtain explicit solutions on the epicentral axis for certain materials, when a point shear load, with a "ramp" time-dependence, is applied to one face of the plate. Also treated is a problem involving plane-strain type motions, namely, the impulsive application of a normal line load to one face of an anisotropic plate, inversion for certain materials again being carried out on the epicentral axis. In both cases a numerical analysis of the solutions is presented.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32894/1/0000273.pd

Thought Suppression in Patients With Bipolar Disorder

Suppression of negative thoughts has been observed under experimental conditions among patients with major depressive disorder (MDD) but has never been examined among patients with bipolar disorder (BD). Patients with BD (n = 36), patients with MDD (n = 20), and healthy controls (n = 20) completed a task that required unscrambling 6-word strings into 5-word sentences, leaving out 1 word. The extra word allowed the sentences to be completed in a negative, neutral, or “hyperpositive” (manic/goal-oriented) way. Participants completed the sentences under conditions of cognitive load (rehearsing a 6-digit number), reward (a bell tone), load and reward, or neither load nor reward. We hypothesized that patients with BD would engage in more active suppression of negative and hyperpositive thoughts than would controls, as revealed by their unscrambling more word strings into negative or hyperpositive sentences. Under conditions of load or reward and in the absence of either load or reward, patients with BD unscrambled more negative sentences than did controls. Under conditions of reward, patients with BD unscrambled more negative sentences than did patients with MDD. Patients with BD also reported more use of negative thought suppression than did controls. These group differences in negative biases were no longer significant when current mood states were controlled. Finally, the groups did not differ in the proportion of hyperpositive sentence completions in any condition. Thought suppression may provide a critical locus for psychological interventions in BD

An evidence map of psychosocial interventions for the earliest stages of bipolar disorder.

Depression, schizophrenia, and bipolar disorder are three of the four most burdensome problems in people aged under 25 years. In psychosis and depression, psychological interventions are effective, low-risk, and high-benefit approaches for patients at high risk of first-episode or early-onset disorders. We review the use of psychological interventions for early-stage bipolar disorder in patients aged 15-25 years. Because previous systematic reviews had struggled to identify information about this emerging sphere of research, we used evidence mapping to help us identify the extent, distribution, and methodological quality of evidence because the gold standard approaches were only slightly informative or appropriate. This strategy identified 29 studies in three target groups: ten studies in populations at high risk for bipolar disorder, five studies in patients with a first episode, and 14 studies in patients with early-onset bipolar disorder. Of the 20 completed studies, eight studies were randomised trials, but only two had sample sizes of more than 100 individuals. The main interventions used were family, cognitive behavioural, and interpersonal therapies. Only behavioural family therapies were tested across all of our three target groups. Although the available interventions were well adapted to the level of maturity and social environment of young people, few interventions target specific developmental psychological or physiological processes (eg, ruminative response style or delayed sleep phase), or offer detailed strategies for the management of substance use or physical health

Controversies concerning the diagnosis and treatment of bipolar disorder in children

This commentary grows out of an interdisciplinary workshop focused on controversies surrounding the diagnosis and treatment of bipolar disorder (BP) in children. Although debate about the occurrence and frequency of BP in children is more than 50 years old, it increased in the mid 1990s when researchers adapted the DSM account of bipolar symptoms to diagnose children. We offer a brief history of the debate from the mid 90s through the present, ending with current efforts to distinguish between a small number of children whose behaviors closely fit DSM criteria for BP, and a significantly larger number of children who have been receiving a BP diagnosis but whose behaviors do not closely fit those criteria. We agree with one emerging approach, which gives part or all of that larger number of children a new diagnosis called Severe Mood Dysregulation or Temper Dysregulation Disorder with Dysphoria