The Opportunistic President: How US Presidents Determine Their Legislative Programs

The president is the most influential policy actor in US politics, and his legislative program greatly influences Congress's agenda. Yet little research has focused on what factors affect the president's choices when constructing his agenda. We develop a theory that determines when a president will include an issue in his program. We hypothesize that presidents structure their agendas around the congressional calendar for consideration of expiring laws and salient issues. Using data over 28 years and across 12 policy areas, we find presidents build their programs around these policymaking opportunities. We assert that presidential agendas are less driven by individual priorities than previous accounts have concluded.     

Objective Analysis of Impressed Chisel Toolmarks

Historical and recent challenges to the practice of comparative forensic examination have created a driving force for the formation of objective methods for toolmark identification. In this study , fifty sequentially manufactured chisels were used to create impression toolmarks in lead (500 toolmarks total). An algorithm previously used to statistically separate known matching and nonmatching striated screwdriver marks and quasi-striated plier marks was used to evaluate the chisel marks. Impression toolmarks, a more complex form of toolmark, pose a more difficult test for the algorithm that was originally designed for striated toolmarks. Results show in this instance that the algorithm can separate matching and nonmatching impression marks, providing further validation of the assumption that toolmarks are identifiably unique.     

Investigating the Potential of Fluorescent Fingerprint Powders as a Marker for Blow Fly Larvae (Diptera: Calliphoridae)

Four fluorescent fingerprint powders (RedWop^?, GreenWop^?, Basic Yellow^?, and Yellow Powder^?) were evaluated as a marker for blow fly larvae. Administration methods included ingestion (high vs. low concentration) or topical. Ingestion of high concentrations of Basic Yellow^? and RedWop^? caused higher larval mortality. Basic Yellow^? delayed development and adult emergence while RedWop^? and Yellow Powder^? had a significant effect on particular stages of development, however, emergence time was not altered. Optimal administration is through ingestion at low concentration levels (<10%) or topically, with GreenWop^? demonstrating minimal adverse effects. Optimum wavelength for discrimination between powders was 450 nm. This research can aid in investigative training to increase visibility of larval and pupal blow flies. It can also be used in entomological studies to differentiate between larval blow flies (or other dipteran) species or individuals to further understand complex interactions and behavior during larval development.     

An empirical assessment of the AIDS Risk Reduction Model (ARRM) employing ordered probit analyses

The AIDS Risk Reduction Model (ARRM) is a conceptual model designed to explain the influence of knowledge and attitudes about AIDS/HIV on risk-related behaviors. This article measures the influence of the primary concepts associated with the ARRM (labeling, commitment, and enactment) on high-risk adolescent's knowledge, attitudes, and self-reported behaviors. Data were collected from 393 adolescents incarcerated in juvenile detention facilities. Ordered probit and ordinary least squares (OLS) analyses were conducted to determine which of several independent variables have the most impact on acceptance of the ARRM. Results indicated that the ARRM is effective for understanding the factors that influence AIDS risk avoidance. Findings also indicate that previous life experiences should be formally integrated into the model. Moreover, specific forms of enactment are associated with different factors. Suggestions as to how the ARRM may prove useful for promoting behavioral change among high-risk adolescents are provided.