Street Cop is not Street-Smart

Frontline, the award-winnnng WGBH-TV series, is airing a nationally televised special on the war against street drugs. The show, called Street Cop, takes viewers to Boston\u27s inner city for fifty minutes of heart-pumping violence. We see the police take a sledgehammer to an apartment door in search of drugs as the women and children inside scream in wide-eyed terror. We watch police officers wrestle a young man to the pavement over a suspected drug deal, and we feel the tension mount during a domestic argument until in the confusion a woman is arrested for throwing what an officer thought was a stone. Later, it turns out to have been a shoe. If war is hell, Street Cop says that life in Roxbury cannot be far behind

Media Images of Boston\u27s Black Community

In their efforts to report on the forces that affect Boston\u27s racial climate, the local media have typically focused on the more obvious institutional actors: businesses, city hall, school boards, churches, the courts, neighborhood groups. Rarely have the media themselves been subjected to the same scrutiny. This study represents one such effort It is an analysis of the images of Boston\u27s black community that are conveyed through the local news media. It asks the question: If a Bostonian relied solely on the local news for information about local blacks, 1) what impressions would he or she be left with, and 2) how representative of reality might those impressions be? Given Boston\u27s housing patterns, the question is far from academic. Much of the city is made up of tightiy segregated neighborhoods, places where white residents might have little or no meaningful contact with blacks. Similarly, Boston\u27s suburbs have failed to follow a national pattern of modest gains in black residents. People who do not interact with blacks would seem particularly vulnerable to media images whose accuracy they can neither verify nor reject on the basis of their personal experience. And yet all of us, no matter where we live, tend to internalize the messages we receive through the media. To the extent that those messages contradict racist attitudes about blacks or reinforce them, the local media stand as agents for positive social change or unwitting perpetuators of racism. To better understand how the local media portray Boston\u27s black community, I monitored news reports from a sample of newspapers and radio and television stations for one month during the summer of 1986. I noted the roles blacks played, the activities blacks were shown to be engaged in, and the events that brought blacks into the news. By comparing the portrayal of blacks in Boston\u27s major media with portrayals in the black media, I sought to understand the criteria that reporters and editors use to judge the newsworthiness of items relating to the black community, and to understand whether (and if so, why) the images broadcast about blacks may be unrepresentative

Media Images and Racial Stereotyping

To better understand how the local media portray Boston\u27s black community, I monitored news reports from a sample of newspapers and radio and television stations for one month during the summer of 1986. I noted the roles blacks played, the activities blacks were shown to be engaged in, and the events that brought blacks into the news. By comparing the portrayal of blacks in Boston\u27s major media with portrayals in the black media, I sought to understand the criteria that reporters and editors use to judge the newsworthiness of items relating to the black community, and to determine whether (and why) the images broadcast about blacks were or were not representative

Media Images of Boston\u27s Black Community

In their efforts to report on the forces that affect Boston\u27s racial climate, the local media have typically focused on the more obvious institutional actors: businesses, city hall, school boards, churches, the courts, neighborhood groups. Rarely have the media themselves been subjected to the same scrutiny. This study represents one such effort. It is an analysis of the images of Boston\u27s black community that are conveyed through the local news media. It asks the question: If a Bostonian relied solely on the local news for information about local blacks, what impressions would he or she be left with, and how representative of reality might those impressions be

Development of a Simulation Framework for CubeSat Performance Modeling

Space systems are notoriously difficult to develop due to the nature of the environment in which they must operate. Designers have only a limited window to ensure systems will function as intended, placing a high importance on testing. This paper discussed the ongoing development of a simulation framework to support Hardware-in-the-Loop (HIL) testing of CubeSat subsystem hardware. This work is being conducted at the Air Force Institute of Technology (AFIT) in support of the institution’s CubeSat program. The simulation framework is organized into the classic spacecraft subsystems. Each of these subsystems will support a software model and interfaces for the integration of flight hardware into the simulation framework. In demonstration of this concept, propulsion hardware has been successfully integrated into the model environment. Telemetry reception and command transmission within the simulation framework is functional and demonstrated. A loop containing the propulsion hardware, simple controller, and orbital motion propagator was developed to demonstrate the HIL test functionality of the simulation framework. This focus on the development of the propulsion HIL test configuration is a point of distinction from other HIL simulations, which typically focus on the Attitude Determination and Control System (ADCS). Presented results validate successful integration of propulsion subsystem hardware into the simulation framework. Future work will focus on the integration of CubeSat subsystem models into the framework

Effects of Timber Harvesting and Plantation Development on Cavity-nesting Birds in New Brunswick

We studied the abundance of cavity-nesting birds in forestry-related habitats in a region of Acadian forest in New Brunswick. We examined five reference stands of natural forest, a chronosequence of conifer plantations up to 19 years old (the oldest in the study area), two selectively harvested stands, and a 30-year-old naturally regenerated clear-cut. The species richness and abundance of cavity-nesting birds were higher in reference forest (average 10.0 species per stand; 5.3 territories per 10 ha) than in plantations (2.3/stand; 1.0/10 ha), selectively harvested stands (7.0/stand; 3.8/10 ha), or the naturally regenerated clear-cut (5.0/stand; 2.5/10 ha). A cluster analysis segregated the “community” of cavity-nesting birds of natural forest from those of other treatments. Of the various harvested stands and plantations, five with a relatively large number of residual snags clustered similarly in the cluster analysis, while those with no or very few snags also clustered together. We used arrays of nest boxes (12 per stand) to examine whether the availability of cavities was limiting the use of habitats otherwise suitable for foraging by cavity-dependent species. Nest-box use for nesting and roosting was much higher in the seven plantations examined (average 4.0/10 ha for nesting and 2.9/10 ha for roosting) than in three reference stands (each 0.3/10 ha), suggesting that the plantations were deficient in this critical-habitat element. Our results suggest that certain mitigations, such as leaving residual snags and living cavity-trees, would help maintain populations of some cavity-dependent birds in clear-cuts and plantations. However, some cavity-dependent species might not be accommodated by these mitigations and are potentially at risk in intensively managed areas, unless landscape-scale management plans ensure the survival of sufficient areas of older mixed-wood forest

Comparison of a human portable blood glucose monitor, a veterinary portable blood glucose monitor and an automated chemistry analyzer for measuring canine blood glucose concentration

OBJECTIVE: To compare blood glucose concentrations measured with 2 portable blood glucose meters (PBGMs) validated for use in dogs (PBGM-D) and humans (PBGM-H) and an automated chemistry analyzer. DESIGN: Validation study. SAMPLE POPULATION: 92 samples of fresh whole blood and plasma from 83 dogs with various diseases. PROCEDURES: Each PBGM was used to measure whole blood glucose concentration, and the automated analyzer was used to measure plasma glucose concentration. Passing-Bablok linear regression and Bland-Altman plots were used to determine correlations and bias between the PBGMs and the automated analyzer. Calculated acceptability limits based on combined inherent instrument imprecision were used with Bland-Altman plots to determine agreement. Clinical relevance was assessed via error grid analysis. RESULTS: Although correlation between results of both PBGMs and the standard analyzer was \u3e 0.90, disagreement was greater than could be explained by instrument imprecision alone. Mean difference between PBGM-H and chemistry-analyzer values was -15.8 mg/dL. Mean difference between PBGM-D and chemistry-analyzer values was 2.4 mg/dL. Linear regression analysis revealed proportional bias of PBGM-H (greater disagreement at higher glucose concentrations); no proportional bias was detected for PBGM-D. No constant bias was detected for either PBGM. Error grid analysis revealed all measurements from both PBGMs were within zones without an anticipated effect on clinical outcome. CONCLUSIONS AND CLINICAL RELEVANCE: Neither PBGM had exact agreement with the automated analyzer; however, the disagreement detected did not have serious clinical consequences. Our findings stressed the importance of using the same device for monitoring trends in dogs and using instrument-specific reference ranges

Habitat‐related error in estimating temperatures from leaf margins in a humid tropical forest

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142103/1/ajb21096.pd

Seeding rates for precision seeded canola

Non-Peer Reviewe

HK-2: An immortalized proximal tubule epithelial cell line from normal adult human kidney

HK-2: An immortalized proximal tubule epithelial cell line from normal adult human kidney. Studies assessing mechanisms of proximal tubular cell (PTC) physiology and pathophysiology increasingly utilize cell culture systems to avoid the complexity of whole organ/whole animal experiments. However, no well-differentiated PTC line derived from adult human kidney currently exists. Therefore, the goal of this research was to establish such a line by transduction with human papilloma virus (HPV 16) E6/E7 genes. A primary PTC culture from normal adult human renal cortex was exposed to a recombinant retrovirus containing the HPV 16 E6/E7 genes, resulting in a cell line designated HK-2 (human kidney-2) which has grown continuously in serum free media for more than one year. HK-2 cell growth is epidermal growth factor dependent and the cells retain a phenotype indicative of well-differentiated PTCs (positive for alkaline phosphatase, gamma glutamyltranspeptidase, leucine aminopeptidase, acid phosphatase, cytokeratin, α3β1 integrin, fibronectin; negative for factor VHI-related antigen, 6.19 antigen and CALLA endopeptidase). Furthermore, HK-2 cells retain functional characteristics of proximal tubular epithelium (Na+ dependent/phlorizin sensitive sugar transport; adenylate cyclase responsiveness to parathyroid, but not to antidiuretic, hormone). The E6/E7 genes are present in the HK-2 genome, as determined by PCR. To assess its potential usefulness as a tool for studying injury and repair, HK-2 cells were exposed to a toxic concentration of H2O2 ± iron chelation (deferoxamine) or hydroxyl radical scavenger (Na benzoate) therapy. Only the former blocked H2O2 cytotoxicity, reproducing results previously obtained with freshly isolated rat proximal tubular segments. In conclusion, an immortalized adult human PTC line has been established by transduction with HPV 16 E6/E7 genes. It appears to be well-differentiated on the basis of its histochemical, immune cytochemical, and functional characteristics, and it can reproduce experimental results obtained with freshly isolated PTCs. Thus, this new PTC line could have substantial research application