Empirical force fields

This Handbook of Police Administration, co-edited by Jim Ruiz and Don Hummer, provides a smorgasbord of topics that are at the coalface of policing: the difficulties police encounter dealing with drug problems, traffic issues, race and ethnicity challenges, and street gang problems. Cross-cutting themes such as leadership in policing, use of force, and understanding how the law shapes (or fails to shape) police practice are relevant to students of police studies, practitioners, and scholars alike.

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As a long-standing advocate for understanding issues of cultural and ethnic diversity, I have served as President of APA Division 45, Society for the Psychological Study of Ethnic Minority Issues, and currently chair the American Psychological Association’s Commission for the Recruitment, Retention and Training of Ethnic Minorities implementation task force (CEMRRAT2). Both of these organizations were instrumental in the approval of the APA Multicultural Guidelines for Practice and the promotion of empirical research addressing mental health issues of ethnic minority clinical populations.

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In the early years of oil drilling and production, wells were primarily drilled on land to moder- ate depths and with relatively minor horizontal offsets, and an empirical understanding of the impact of geological forces and Earth material properties on required drilling practice was de- veloped by region. Successful practices were defined by trial and (sometimes costly and spectacular) error.

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An ultimate goal of modern biology is to understand how the genetic blueprint of cells (genotype) determines the structure, function, and behavior of a living organism (phenotype). At the center of this scientific endeavor is characterizing the biochemical and cellular roles of proteins, the working molecules of the machinery of life. A key to understanding of functional proteins is the knowledge of their folded structures in a cell, as the structures provide the basis for studying proteins’ functions and functional mechanisms at the molecular level....

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