Disk pole location for uncertain systems through convex optimization

In this paper, a necessary and sufficient condition for disk pole location for uncertain continuous or discrete time systems subject to norm-bounded uncertainty is derived. This condition being convex, the control law design is made through convex optimization. The approach adopted follows the quadratic stabilizability philosophy in the problem of pole placement.     

Categorisation and Retrieval of Scene Photographs from JPEG Compressed Database

Natural image categorisation and retrieval is the main challenge for image indexing. With the increase of available images and video databases, there is a real need to, first, organise the database automatically according to different semantic groups, and secondly, to take into account these large databases where most of the data is stored in a compressed form. The global distribution of orientation features is a very powerful tool to semantically organise the database into groups, such as outdoor urban scenes, indoor scenes, ‘closed’ landscapes (valleys, mountains, forests, etc.) and ‘open’ landscapes (deserts, fields, beaches, etc.). The constraint of a JPEG compressed database is completely integrated with an efficient implementation of an orientation estimator in the DCT (Discrete Cosinus Transform) domain. The proposed estimator is analysed from different points of view (accuracy and discrimination power). The images are then globally characterised by a set of a few parameters (two or three), allowing a fast scenes categorisation and organisation which is very robust to the quantisation effect, up to a quality factor of 10 in the JPEG format.     

Proneness to shame, proneness to guilt, and psychopathology.

Examined the links between shame, guilt, and psychopathology. In 2 studies, 245 and 234 undergraduates completed the Self-Conscious Affect and Attribution Inventory, the SCL-90, the Beck Depression Inventory, the State-Trait Anxiety Scale, and the Attributional Style Questionnaire. Results failed to support H. B. Lewis's (1971) notion that shame and guilt are differentially related to unique symptom clusters. Shame-proneness was strongly related to psychological maladjustment in general. Guilt-proneness was only moderately related to psychopathology; correlations were ascribable entirely to the shared variance between shame and guilt. Although clearly related to a depressogenic attributional style, shame accounted for substantial variance in depression, above and beyond attributional style. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A reply to Kaplan and Parlow: Minority rights and public health are not mutually exclusive.

It is unfortunate that Kaplan and Parlow (1988) misinterpreted our plea for justice and compassion in balancing the rights of smokers and non-smokers (1987; see record 1989-01264-001) as a blanket endorsement of smokers' rights to expose abstainers to environmental tobacco smoke (ETS). We absolutely do not advocate such a straw man; obviously, innocent third parties have the right to be protected. Kaplan and Parlow's assertion that our position is that "smoking is not a legitimate threat" is totally incorrect. In pointing to the controversy in the scientific literature about the degree of risk associated with ETS, we were not arguing that the risk is non-existent, nor that smokers are entitled to do as they please if others are adversely affected (or even if abstainers simply find ETS esthetically objectionable). Rather, we were emphasizing that the warlike rhetoric, emotionalism, and morally superior stance of the anti-smoking crusade can have a negative impact on the scientific objectivity that ought to guide social policy. The commendability of one's goals is not an excuse for ignoring contrary evidence or failing to examine the evidence for preferred hypotheses as critically as one would the support for unpopular causes. Our concern in our article, which Kaplan and Parlow failed to realize, was with how the rights of both smokers and non-smokers can best be achieved with a minimum of social and personal costs. The intent of our article was to remind readers that, in the past, emotionality and haste on the part of well-intentioned reformers have often been responsible for unnecessary social disruption and trammelling of individual rights--all while failing to achieve their noble goals. We agree with Kaplan and Parlow's position that individuals must be protected from exposure to unwanted ETS and that is the position we took in our article. This, however, can be done without creating greater social problems by trampling on the rights of smokers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effectiveness of abstinence-based incentives: Interaction with intake stimulant test results.

Intake urinalysis test result (drug positive vs. negative) has been previously identified as a strong predictor of drug abuse treatment outcome, but there is little information about how this prognostic factor may interact with the type of treatment delivered. The authors used data from a multisite study of abstinence incentives for stimulant abusers enrolled in outpatient counseling treatment (N. M. Petry, J. M. Peirce, et al., 2005) to examine this question. The first study urine was used to stratify participants into stimulant negative (n = 306) versus positive (n = 108) subgroups. Abstinence incentives significantly improved retention in those testing negative but not in those testing positive. Findings suggest that stimulant abusers presenting to treatment with a stimulant-negative urine benefit from abstinence incentives, but alternative treatment approaches are needed for those who test stimulant positive at intake. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Infants interpret ambiguous requests for absent objects.

The current studies investigated 2 skills involved in 14- to 20- month-olds' ability to interpret ambiguous requests for absent objects: tracking others' experiences (Study 1) and representing links between speakers and object features across present and absent reference episodes (Study 2). In the basic task, 2 experimenters played separately with a different ball. The balls were placed in opaque containers. One experimenter asked infants to retrieve her ball using an ambiguous request ("Where's the ball?"). In Study 1, infants used the experimenter's prior verbal and physical contact with the ball to interpret the request. A control condition demonstrated that infants were interpreting the request and not responding to the mere presence of the experimenter. Study 2 revealed that only infants who were given stable cues to the ball's spatial location appropriately interpreted the request: When spatial information was put in conflict with a color cue, infants did not select the correct ball. Links to infants' spatial memory skills and emerging pragmatic understanding are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relations between parental control and warmth and child well-being in stepfamilies.

Examined type-of-stepfamily differences in child well-being and parenting behaviors and how child well-being in stepfamilies relates to parenting behaviors. Data were drawn from the National Survey of Families and Households (J. A. Sweet et al, 1988) and included fathers and mothers in 448 stepfather, 76 stepmother, and 41 complex stepfamilies. Biological parents in stepfamilies perceived themselves as having higher quality relationships with their children than stepparents reported having with their stepchildren. Although stepfathers reported behaving less positively toward their children than did other fathers, stepmothers reported responding as positively to their stepchildren as did biological mothers in stepfamilies. In general, child well-being was positively related to perceptions of parental warmth. The relations between parental control and child well-being varied for different dimensions of well-being and in different types of stepfamilies. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The use of religious coping during stressful life events: Main effects, moderation, and mediation.

The effects of religious coping, the potential moderation of such effects by religious affiliation (i.e., Catholic, Protestant), and the potential mediation of such effects by various factors (i.e., cognitive restructuring, social support, perceived control) were investigated in patients and significant others coping with the stress of kidney transplant surgery. At 3 and 12 months after transplantation, results showed that the use of religious coping was generally associated with better adjustment both concurrently and over time in both patients and significant others. These effects were moderated by religious affiliation, such that religious coping was more effective in promoting adjustment for Protestants than for Catholics. Religious coping was related to adjustment beyond the effects of the proposed mediators. Implications of these results for future research and practice are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

P50 suppression in recent-onset schizophrenia: Clinical correlates and risperidone effects.

Chronic schizophrenic patients often do not suppress the auditory P50 component of the event-related potential to the second of 2 clicks, presented 500 ms apart, suggesting a loss of normal inhibition. This study attempted to replicate the P50 suppression deficit in patients with recent-onset schizophrenia and to examine whether P50 is related to clinical symptoms or is affected by an atypical antipsychotic medication. Data from 22 recent-onset schizophrenia patients and 11 normal controls revealed that disruption in P50 suppression is present during the early stages of illness. In addition, impaired P50 suppression covaried with clinical ratings of anxiety, depression, and anergia; results also suggested that the P50 inhibitory deficit may be related to the degree of patients' attentional impairment. Finally, risperidone, compared with a typical antipsychotic medication, improved inhibition of P50 to the second click. These results support P50 suppression as a measure of disordered neurocognition in schizophrenia. (PsycINFO Database Record (c) 2010 APA, all rights reserved)