University of California, Irvine

About: University of California, Irvine is a education organization based out in Irvine, California, United States. It is known for research contribution in the topics: Population & Galaxy. The organization has 47031 authors who have published 113602 publications receiving 5521832 citations. The organization is also known as: UC Irvine & UCI.

Economic Networks: The New Challenges

Abstract: The current economic crisis illustrates a critical need for new and fundamental understanding of the structure and dynamics of economic networks. Economic systems are increasingly built on interdependencies, implemented through trans-national credit and investment networks, trade relations, or supply chains that have proven difficult to predict and control. We need, therefore, an approach that stresses the systemic complexity of economic networks and that can be used to revise and extend established paradigms in economic theory. This will facilitate the design of policies that reduce conflicts between individual interests and global efficiency, as well as reduce the risk of global failure by making economic networks more robust.

Dopamine activation of endogenous cannabinoid signaling in dorsal striatum

Abstract: We measured endogenous cannabinoid release in dorsal striatum of freely moving rats by microdialysis and gas chromatography/mass spectrometry Neural activity stimulated the release of anandamide, but not of other endogenous cannabinoids such as 2-arachidonylglycerol Moreover, anandamide release was increased eightfold over baseline after local administration of the D2-like (D2, D3, D4) dopamine receptor agonist quinpirole, a response that was prevented by the D2-like receptor antagonist raclopride Administration of the D1-like (D1, D5) receptor agonist SKF38393 had no such effect These results suggest that functional interactions between endocannabinoid and dopaminergic systems may contribute to striatal signaling In agreement with this hypothesis, pretreatment with the cannabinoid antagonist SR141716A enhanced the stimulation of motor behavior elicited by systemic administration of quinpirole The endocannabinoid system therefore may act as an inhibitory feedback mechanism countering dopamine-induced facilitation of motor activity

Violent Childhood Experiences and the Risk of Intimate Partner Violence in Adults Assessment in a Large Health Maintenance Organization

Abstract: Information about the relationship of experiencing abuse or witnessing domestic violence in childhood to the risk of intimate partner violence (IPV) in adulthood is scant. The relationship of childhood physical or sexual abuse or growing up with a battered mother to the risk of being a victim of IPV for women or a perpetrator for men was studied among 8,629 participants in the Adverse Childhood Experiences Study conducted in a large HMO. Each of the three violent childhood experiences increased the risk of victimization or perpetration of IPV approximately two-fold. A statistically significant graded relationship was found between the number of violent experiences and the risk of IPV. Among persons who had all three forms of violent childhood experiences, the risk of victimization and perpetration was increased 3.5-fold for women and 3.8-fold for men. These data suggest that as part of risk assessment for IPV in adults, screening for a history of childhood abuse or exposure to domestic violence is needed.

Volumetric MRI analysis comparing subjects having attention-deficit hyperactivity disorder with normal controls

Abstract: Article abstract-Objective: To test by MRI-based morphometry the a priori hypotheses that developmental anomalies exist in attention-deficit hyperactivity disorder (ADHD) in left caudate and right prefrontal/frontal/ and/or posterior parietal hemispheric regions, in accord with neurochemical, neuronal circuitry and attentional network hypotheses, and prior imaging studies. Design: Case-control study. Setting: Academic medical center. Participants: Fifteen male subjects with ADHD without comorbid diagnoses (aged 12.4 +/- 3.4 years) and 15 male normal controls (aged 14.4 +/- 3.4), group-matched for age, IQ, and handedness. Main outcome measures: Global and hemispheric regional volumes (in cm 3 ) of cerebral hemispheres, cortex, white matter, ventricles, caudate, lenticulate, central gray nuclei, insula, amygdala, and hippocampus. Results: Despite similar hemispheric volumes, ADHD subjects had smaller volumes of (1) left total caudate and caudate head (p NEUROLOGY 1997;48: 589-601

Understanding ENSO Diversity

Abstract: El Nino–Southern Oscillation (ENSO) is a naturally occurring mode of tropical Pacific variability, with global impacts on society and natural ecosystems. While it has long been known that El Nino events display a diverse range of amplitudes, triggers, spatial patterns, and life cycles, the realization that ENSO’s impacts can be highly sensitive to this event-to-event diversity is driving a renewed interest in the subject. This paper surveys our current state of knowledge of ENSO diversity, identifies key gaps in understanding, and outlines some promising future research directions.