PubMed Health⌕ Search

Biomedical subjects

G Finkelstein

Publications and source records attributed to G Finkelstein.

14 recordsLinked to original sources
PubMed2000

Topographic mapping of the quantum hall liquid using a few-electron bubble

A scanning probe technique was used to obtain a high-resolution map of the random electrostatic potential inside the quantum Hall liquid. A sharp metal tip, scanned above a semiconductor surface, sensed charges in an embedded two-dimensional (2D) electron gas. Under quantum Hall effect conditions, applying a positive voltage to the tip locally enhanced the 2D electron density and created a "bubble" of electrons in an otherwise unoccupied Landau level. As the tip scanned along the sample surface, the bubble followed underneath. The tip sensed the motions of single electrons entering or leaving the bubble in response to changes in the local 2D electrostatic potential.

Journal Article↗
PubMed2000

Why Darwin was English.

A 'late developer' argument, common to Psychology and Economic History, can be used to explain cultural innovation. It argues that the 19th century theory of natural selection arose in England and not Germany because of--and not in spite of--England's scientific backwardness. Measured in terms of institutions, communities, and ideas, the relative retardation of English science was precisely what enabled it to adopt German advances in novel ways.

Biological Evolution↗
PubMed1993

Correlates of suicide and violence risk in an inpatient population: coping styles and social support.

Forty-six suicidal psychiatric inpatients were compared with 44 nonsuicidal psychiatric inpatients on measures of suicide risk, violence risk, impulsivity, feelings of anger, social support, and eight coping styles. The two groups were similar on demographic variables, but the suicidal patients were higher on the suicide risk scale, the violence risk scale, the impulsivity scale, and feelings of anger. Suicidal patients were significantly less likely to use the coping style of minimization to deal with life problems. A negative correlation was found between the social support measure and both suicide risk and violence risk. Three coping styles were found to correlate negatively with violence risk, but none with suicide risk. Coping styles were found to be a better predictor of violence risk than of suicide risk. It was also found that the more variables included in the predictor equation, the higher the correlation with the risk measures.

Adaptation, Psychological↗
PubMedDate not supplied

The Suicide and Aggression Survey: a semistructured instrument for the measurement of suicidality and aggression.

Despite the rising concern with the increasing rate of violent and suicidal behaviors in this country and others, we remain relatively limited in our ability to rigorously define, classify, and measure these behaviors. In addition to our previous work in developing self-rating scales assessing aspects of aggressive behaviors, we have developed the Suicide and Aggression Survey (SAS), a new, comprehensive, semistructured interview and research tool, for the purpose of comprehensively evaluating and understanding the multiple constituents of these behaviors, and for assisting in predicting which individuals might be at high risk for suicide or violence. The present report describes the need for such an instrument and the theoretical models that have guided us in constructing it; one of these is a sequential description of the major classes of variables related to aggression and the other is a two-stage model of countervailing forces. Preliminary reliability data and a description of the structure of the interview are included.

Adolescent↗
PubMedDate not supplied

Correlates of violence risk in hospitalized adolescents.

Forty adolescent inpatients with histories of frequent interpersonal violent behavior were compared with 36 hospitalized adolescents without histories of overt violence using self-report questionnaires that measured violence risk, depression, impulsivity, and suicide risk. The two groups did not differ in terms of their demographic characteristics, but the violent patients had a higher prevalence of substance abuse and borderline personality disorder diagnoses. Violent adolescents were more impulsive and at higher suicide risk than nonviolent adolescents. In addition, violent adolescents had more positive histories of suicide attempts and had significantly higher family histories of attempted and completed suicide. In the total sample of adolescents, violence risk was significantly correlated with impulsivity and suicide risk, but not with depression.

Adolescent↗