Helicopter sling load accident/incident survey: 1968 - 1974

During the period considered a mean of eleven accidents per year occurred and a mean of eleven persons were killed or seriously injured per year. Forty-one percent of the accidents occurred during hover, and 63 percent of the accidents had pilot error listed as a cause/factor. Many accidents involved pilots losing control of the helicopter or allowing a collision with obstructions to occur. There was a mean of 58 incidents each year and 51 percent of these occurred during cruise

When CoGeNT met PAMELA

If the excess events from the CoGeNT experiment arise from elastic scatterings of a light dark matter off the nuclei, crossing symmetry implies non-vanishing annihilation cross-sections of the light dark matter into hadronic final states inside the galactic halo, which we confront with the anti-proton spectrum measured by the PAMELA collaboration. We consider two types of effective interactions between the dark matter and the quarks: 1) contact interactions from integrating out heavy particles and 2) long-range interactions due to the electromagnetic properties of the dark matter. The lack of excess in the anti-proton spectrum results in tensions for a scalar and, to a less extent, a vector dark matter interacting with the quarks through the Higgs portal.Comment: 15 pages, 3 figures. Updated references and included effects of solar modulatio

The Other Side of the Rabbit Hole: Reconciling Recent Supreme Court Personal Jurisdiction Jurisprudence with Jurisdiction to Terminate Parental Rights

This Essay contrasts the jurisdictional regime followed in termination of parental rights and other child custody cases with the regime that has dominated recent Supreme Court personal jurisdiction cases. Jurisdiction in child custody cases has long been based upon the connection of the child, not the defendant parent, to the jurisdiction. Recent Supreme Court cases, on the other hand, have focused nearly exclusively on the defendant’s connection to the forum state. This Essay argues that the Supreme Court cases betray a failure of the Court to provide a consistent constitutional justification for the jurisdictional limitations it has imposed. The Essay suggests that the regime followed in child custody cases can be reconciled with the various justifications that the Court has offered for limiting the scope of personal jurisdiction and further suggests that the child custody jurisdictional regime provides a useful example of a constitutionally permissible jurisdictional regime based upon the interest of the forum state in resolving the dispute and the connection of the litigation to the forum state

An Interview with Marcia Tate: Formative Assessment and Brain Based Learning

In this interview, Dr. Marcia Tate discusses her work and focuses on critical issues in brain based learning, and the need for both formative and summative assessment. Tangential issues such as grade retention, and response to intervention are also discussed. It is hope that this interview will assist teachers in the instructional and learning process and aid in both formative and summative assessment