Neighborhood Characteristics and Crime: A Test of Sampson and Groves\u27 Model of Social Disorganization

In 1989 Sampson and Groves proposed a model of social disorganization. In this model, neighborhoods with low socioeconomic status, high residential mobility, racial heterogeneity, and family disruption were predicted to have sparse local friendship networks\u27, low organizational participation, and unsupervised youth groups. These, in turn, were predicted to increase neighborhood crime rates. Although Sampson and Groves\u27 work represents the most complete model of social disorganization to date, it has only been tested twice and then on the same data set. Using data from 36 neighborhoods from 7 U.S. cities, this study examines extensions of Sampson and Groves\u27 model suggested by past research findings. The results indicate that Sampson and Groves\u27 model is modestly supported by the data. Social disorganization variables are more effective in transmitting the effects of neighborhood structural characteristics on assault than on robbery. Implications of the study and directions for future research are discussed

Social Disorganization and the Ability and Willingness to Enact Control: A Preliminary Test

Dominant models in the social disorganization literature differentially focus on the ability of neighborhoods to enact social control and the willingness to do so. Despite the interest in both concepts, often no clear definition of either is provided, and there is little discussion of their relationship or how they interact to affect neighborhood crime rates. This paper begins to explore the relationship between ability and willingness to enact social control. The findings suggest that, for formal control, ability and willingness are closely related. Furthermore, at the aggregate level, concentrated disadvantage combined with perceived inability has a strong impact on neighborhood crime rates

Justifications for the Probation Sanction Among Residents of Virginia--Cool or Un-Cool?

Perhaps as evidence of a growing cultural gap between our students and ourselves, one of the authors was recently amused when a student asked whether probation was a cool sanction. In this study, we begin an investigation into how cool the probation sanction is in the eyes of residents of the Commonwealth of Virginia. Specifically, we use data from a telephone survey of 840 registered voters to explore three questions. First, how often would they recommend the probation sanction in comparison to other sanctions? Second, how do they justify the sanction relative to justifications for other sanctions? Finally, are their justifications and sentencing recommendations consistent across crimes? We address these questions in this study to see whether the sanction is cool or uncool. In the review of literature, we discuss punishment justifications in general and probation as a punitive experience

A cross-discipline approach to healthcare needs

With rapid advancements in technology and growing demand for better healthcare, hospitals are struggling to find a balance between providing the best possible care and maintaining a responsible budget. This issue is especially evident in small hospitals lacking resources and infrastructure to keep up with modern technology. The Engineering for Modern Healthcare Creative Inquiry is a collaboration between Industrial Engineering and Bioengineering students. Our goal is to help small hospitals to develop efficient, cost-effective solutions to their needs. Currently, we are working with hospitals in South Carolina and Virginia to explore these solutions. We are interviewing clinicians, nurses, and other staff members to better understand current practices and identify improvement opportunities. Our initial focus will be on inventory management and sterile processing. Utilizing both departments\u27 expertise, we will develop a comprehensive solution to this complicated need

Clay mineral formation under oxidized conditions and implications for paleoenvironments and organic preservation on Mars

Clay mineral-bearing locations have been targeted for martian exploration as potentially habitable environments and as possible repositories for the preservation of organic matter. Although organic matter has been detected at Gale Crater, Mars, its concentrations are lower than expected from meteoritic and indigenous igneous and hydrothermal reduced carbon. We conducted synthesis experiments motivated by the hypothesis that some clay mineral formation may have occurred under oxidized conditions conducive to the destruction of organics. Previous work has suggested that anoxic and/or reducing conditions are needed to synthesize the Fe-rich clay mineral nontronite at low temperatures. In contrast, our experiments demonstrated the rapid formation of Fe-rich clay minerals of variable crystallinity from aqueous Fe^(3+) with small amounts of aqueous Mg^(2+). Our results suggest that Fe-rich clay minerals such as nontronite can form rapidly under oxidized conditions, which could help explain low concentrations of organics within some smectite-containing rocks or sediments on Mars

Saponite Dissolution Experiments and Implications for Mars

Recent work suggests that the mineralogical sequence of the Murray formation at Gale crater may have resulted from diagenetic alteration after sedimentation, or deposition in a stratified lake with oxic surface and anoxic bottom waters. Fe-containing clay minerals are common both at Gale crater, and throughout the Noachian-aged terrains on Mars. These clay minerals are primarily ferric (Fe3+), and previous work suggests that these ferric clay minerals may result from alteration of ferrous (Fe2+) smectites that were oxidized after deposition. The detection of trioctahedral smectites at Gale crater by CheMin suggests Fe2+ smectite was also deposited during the early Hesperian. However, due to their sensitivity to oxygen, Fe2+ smectites are difficult to analyze on Earth and very few saponite dissolution rates exist in the literature. To the best of our knowledge, no experiments have measured the dissolution rates of ferrous saponites under oxidizing and reducing conditions. In order to better understand the characteristics of water-rock interaction at Gale crater, particularly the oxidation state, we report our results to date on ongoing syntheses of ferrous and magnesium saponites and dissolution experiments of natural saponite under ambient conditions. Future experiments will include the dissolution of synthetic ferric, ferrous, and magnesium saponites under oxidizing and anoxic conditions at a range of pH values

Tuning gastropod locomotion: Modeling the influence of mucus rheology on the cost of crawling

Common gastropods such as snails crawl on a solid substrate by propagating muscular waves of shear stress on a viscoelastic mucus. Producing the mucus accounts for the largest component in the gastropod's energy budget, more than twenty times the amount of mechanical work used in crawling. Using a simple mechanical model, we show that the shear-thinning properties of the mucus favor a decrease in the amount of mucus necessary for crawling, thereby decreasing the overall energetic cost of locomotion.Comment: Corrected typo

Designing medical technology for developing countries

Resource-poor countries have markedly different healthcare systems. Many developed nations donate medical supplies to these countries, but this often does not meet the needs of the recipients. Our goal is to develop simple healthcare solutions that can be produced in-country so the developing area does not depend on outside sources for its supplies. Our group works on many projects, including sustainable woven grass neck braces and a variety of low-cost sensors. Our designs do not require frequent donations, minimize the use of consumables, and provide better detection and/or treatment of prevalent medical concerns. Our baby monitor will detect skin temperature and control a heating element based on the needs of the infant. Our low-cost glucometer operates with the use of test strips that can be printed for a penny with a standard inkjet printer. This will allow the hospital or clinic to print the strips themselves rather than depend on donated strips. Our bacterial sensor will measure resistance to quickly detect the quantity of bacteria in a sample. We seek sustainable solutions for in-house manufacturing to advance more self-sufficient healthcare systems