Direct observation of closed magnetic flux trapped in the high-latitude magnetosphere.

The structure of Earth's magnetosphere is poorly understood when the interplanetary magnetic field is northward. Under this condition, uncharacteristically energetic plasma is observed in the magnetotail lobes, which is not expected in the textbook model of the magnetosphere. Using satellite observations, we show that these lobe plasma signatures occur on high-latitude magnetic field lines that have been closed by the fundamental plasma process of magnetic reconnection. Previously, it has been suggested that closed flux can become trapped in the lobe and that this plasma-trapping process could explain another poorly understood phenomenon: the presence of auroras at extremely high latitudes, called transpolar arcs. Observations of the aurora at the same time as the lobe plasma signatures reveal the presence of a transpolar arc. The excellent correspondence between the transpolar arc and the trapped closed flux at high altitudes provides very strong evidence of the trapping mechanism as the cause of transpolar arcs.

Factors influencing maltreated children's early adjustment in foster care.

Internal representations of self and primary attachment figures may be one mechanism by which maltreatment affects children's interpersonal behavior and relationships with others. Research on the continuity and influence of maltreated children's attachment representations, however, has not included youngsters removed from abusive or neglectful home environments. This paper examines the influence of maltreated children's maternal and self-representations on subsequent relationships with foster mothers and behavioral adjustment in foster care. Participants included 32 children, ages 9-13 years, who entered foster placement for the first time after a sustained relationship with a maltreating biological mother. Upon initially entering foster care, children's maternal and self-representations were significantly related to each other and to severity of maltreatment history but not to other factors believed to influence the quality of parent-child relationship (e.g., maternal mental health, partner stability). In addition, these representations significantly predicted children's subsequent views of their relationships with foster mothers. Finally, children's behavior in their foster homes was associated with maltreatment severity, internal representations assessed at entry into foster care, and to concurrent perceptions of their new foster mothers. These findings advance our understanding of foster placement's role in maltreated children's development and provide preliminary insight into the processes associated with the formation of potentially compensatory relationships.