Empirical Evaluation of the Reliability of Photogrammetry Software in the Recovery of Three-Dimensional Footwear Impressions

This paper examines the reliability of Structure from Motion (SfM) photogrammetry as a tool in the capture of forensic footwear marks. This is applicable to photogrammetry freeware DigTrace but is equally relevant to other SfM solutions. SfM simply requires a digital camera, a scale bar, and a selection of oblique photographs of the trace in question taken at the scene. The output is a digital three-dimensional point cloud of the surface and any plastic trace thereon. The first section of this paper examines the reliability of photogrammetry to capture the same data when repeatedly used on one impression, while the second part assesses the impact of varying cameras. Using cloud to cloud comparisons that measure the distance between two-point clouds, we assess the variability between models. The results highlight how little variability is evident and therefore speak to the accuracy and consistency of such techniques in the capture of three-dimensional traces. Using this method, 3D footwear impressions can, in many substrates, be collected with a repeatability of 97% with any variation between models less than ~0.5 mm.     

Beyond formal university technology transfer: innovative pathways for knowledge exchange

The Journal of Technology Transfer - University technology transfer is often associated with formal transmission of science-based inventions, for instance through the licensing of patented...     

Neighborhood,Family, and Peer Factors Associated with Early Adolescent Smoking and Alcohol Use

There is broad agreement that neighborhood contexts are important for adolescent development, but there is less consensus about their association with adolescent smoking and alcohol use. Few studies have examined associations between neighborhood socioeconomic contexts and smoking and alcohol use while also accounting for differences in family and peer risk factors for substance use. Data drawn from the Seattle Social Development Project (N?=?808), a gender-balanced (female?=?49%), multiethnic, theory-driven longitudinal study originating in Seattle, WA, were used to estimate trajectories of smoking and alcohol use from 5th to 9th grade. Time-varying measures of neighborhood socioeconomic, family, and peer factors were associated with smoking and alcohol use at each wave after accounting for average growth in smoking and alcohol use over time and demographic differences. Results indicated that living in more socioeconomically disadvantaged neighborhoods, lower family income, lower family general functioning, more permissive family smoking environments, and affiliation with deviant peers were independently associated with increased smoking. Lower family functioning, more permissive family alcohol use environments, and deviant peers were independently associated with increased alcohol use. The effect of neighborhood disadvantage on smoking was mediated by family income and deviant peers while the effect of neighborhood disadvantage on alcohol use was mediated by deviant peers alone. Family functioning and family substance use did not mediate associations between neighborhood disadvantage and smoking or alcohol use. The results highlight the importance of neighborhood, family, and peer factors in early adolescent smoking and alcohol use. Future studies should examine the unique association of neighborhood disadvantage with adolescent smoking net of family socioeconomics, functioning, and substance use, as well as peer affiliations. Better understanding of the role of contextual factors in early adolescent smoking and alcohol use can help bolster efforts to prevent both short and long harms from substance use.     

The use of mindfulness to promote ethical decision making and behavior: Empirical evidence from the public sector in Thailand

The study has two main purposes. First, the study explores core ethical values and behaviors from the perspective of Thai public service organizational leaders. Second, the study investigates the extent to which public sector leaders in Thailand consider Buddhist-based mindfulness practice to be a potentially effective mechanism for reinforcing core ethical values and behaviors in the public sector in Thailand. Using interview data derived from in-depth semi-structured interviews with 12 senior public sector officials in Thailand, the analysis elicits four dimensions of core ethical values and behaviors that are perceived by Thai public service organizational leaders as central to ethical behavior in the public sector. The study also sheds light on the interviewees' positive perceptions towards mindfulness and the role its associated practices can play in promoting ethical decision making and behavior in the public sector in Thailand.     

Public service ethics,values and spirituality in developing and transitional countries: Challenges and opportunities

Concerns over the unethical conduct of leaders and public officials have led to the renaissance of interest in public service ethics and values. Although national and organizational systems and structures have been instituted to either eradicate or ameliorate unethical behaviours in the public service of countries, the practice still persists with devastating consequences. As one way forward, spirituality has been touted as having the potential of stimulating the moral thoughts of individuals who are dealing with ethical issues, thereby reducing unethical behaviour and generating positive organizational behaviour. Drawing from the perspectives of developing and transitional countries, this special issue empirically examines the extent to which ethics, values and spirituality can reduce unethical behaviours.     

Race, “Deservingness,” and Social Spending Attitudes: The Role of Policy Delivery Mechanism

This paper examines how the means through which social benefits are delivered—either through a direct government program, or through a tax expenditure program—affects how citizens view social welfare programs and their beneficiaries. Attitudes toward social spending in the United States are strongly conditioned by both racial considerations and perceptions of the deservingness of recipients. We argue that the political cues given by spending conducted through the tax code differ from those given by direct spending in a way that both de-racializes spending attitudes and changes the lens through which citizens evaluate the deservingness of beneficiaries. Through a series of survey experiments, we demonstrate that social benefits delivered through the tax code are less likely to activate racialized thinking than similar or identical benefits delivered directly. This is true, at least in part, because recipients of tax expenditures are perceived as more deserving than recipients of otherwise identical direct spending.

     

Big School,Small School: (Re)Testing Assumptions about High School Size,School Engagement and Mathematics Achievement

In an effort to increase both adolescents’ engagement with school and academic achievement, school districts across the United States have created small high schools. However, despite the widespread adoption of size reduction reforms, relatively little is known about the relationship between size, engagement and outcomes in high school. In response, this article employs a composite measure of engagement that combines organizational, sociological, and psychological theories. We use this composite measure with the most recent nationally-representative dataset of tenth graders, Educational Longitudinal Study: 2002, (N = 10,946, 46% female) to better assess a generalizable relationship among school engagement, mathematics achievement and school size with specific focus on cohort size. Findings confirm these measures to be highly related to student engagement. Furthermore, results derived from multilevel regression analysis indicate that, as with school size, moderately sized cohorts or grade-level groups provide the greatest engagement advantage for all students and that there are potentially harmful changes when cohorts grow beyond 400 students. However, it is important to note that each group size affects different students differently, eliminating the ability to prescribe an ideal cohort or school size.     

Intentional Self Regulation in Middle Adolescence: The Emerging Role of Loss-based Selection in Positive Youth Development

Intentional self regulation describes how people make choices, plan actions to reach their goals, and regulate the execution of their actions, making processes of intentional self regulation central to healthy human functioning. Prior research has confirmed the presence of three processes of intentional self regulation—elective selection (ES), optimization (O), and compensation (C)—in middle adolescence (Grades 8 through 10) and concurrent and predictive relationships with measures of Positive Youth Development (PYD). A fourth process, loss-based selection (LBS), should also develop by the end of middle adolescence. The present study used data from the 4-H Study of PYD to confirm the presence of a four-scale structure of intentional self regulation (ES, O, C, and LBS) in a sample of 2,357 racially diverse Grade 10 youth (63% female) and examine its covariation with indicators of positive and problematic development. Results supported the identification of a four-part structure of intentional self regulation, and scores covaried positively with indicators of PYD and negatively with substance use, delinquency, and depressive symptoms. Implications of the findings for the understanding of self-regulatory actions in adolescence and for future research are discussed.     

Parental leave policies and parents' employment and leave‐taking

We describe trends in maternal employment and leave‐taking after birth of a newborn and analyze the extent to which these behaviors are influenced by parental leave policies. Data are from the June Current Population Survey (CPS) Fertility Supplements, merged with other months of the CPS, and cover the period 1987 to 1994. This time span is one during which parental leave legislation expanded at both the state and federal level. We also provide the first comprehensive examination of employment and leave‐taking by fathers of infants. Our main finding is that leave expansions are associated with increased leave‐taking by both mothers and fathers. The magnitudes of the changes are small in absolute terms but large relative to the baseline for men and much greater for college‐educated or married mothers than for their less‐educated or single counterparts. © 2009 by the Association for Public Policy Analysis and Management